/* StreamSnag website. System fonts only, nothing loaded from other hosts.
   One accent, and it means one thing: a minute in the lecture.
   Light by default, dark when the system asks for it, and the header button overrides either. */

/* ---------- Tokens ---------- */

:root {
  --font-ui: "Segoe UI Variable Text", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", system-ui, sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", system-ui, sans-serif;
  --font-said: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --font-min: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, monospace;

  --bg: #f6f7f9;
  --bg-2: #eceef2;
  --stage: #e5e8ed;
  --surface: #ffffff;
  --tint: #f0f2f5;
  --ink: #0e1116;
  --ink-2: #434a55;
  --ink-3: #5b6370;
  --ink-pre: #6c7482;
  --line: #d6dadf;
  --line-strong: #b0b7c1;
  --accent: #e8590c;
  --accent-ink: #a83c07;
  --on-accent: #0e1116;
  --free-bg: #dcf0e8;
  --free-ink: #14584a;
  --ai-bg: #fff0c2;
  --ai-ink: #5a4200;
  --ai-line: #dfbf5e;
  --butter: #ffd466;
  --shadow: 0 1px 1px rgba(14, 17, 22, .05), 0 22px 44px -22px rgba(14, 17, 22, .26);
  --shadow-sm: 0 1px 1px rgba(14, 17, 22, .04), 0 8px 20px -14px rgba(14, 17, 22, .22);
  --hero-glow: #ffffff;

  --gutter: clamp(16px, 4vw, 40px);
  --ease: cubic-bezier(.16, 1, .3, 1);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101317;
    --bg-2: #0b0d10;
    --stage: #0a0c0f;
    --surface: #181c22;
    --tint: #20252d;
    --ink: #f1f3f5;
    --ink-2: #b9bfc9;
    --ink-3: #969da8;
    --ink-pre: #7d8694;
    --line: #2a3038;
    --line-strong: #414853;
    --accent: #ff6a1f;
    --accent-ink: #ff8f55;
    --on-accent: #0b0d10;
    --free-bg: #12382f;
    --free-ink: #93dcc6;
    --ai-bg: #3a2f0d;
    --ai-ink: #f2d27a;
    --ai-line: #6b5618;
    --butter: #c79a35;
    --shadow: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 24px 48px -24px rgba(0, 0, 0, .7);
    --shadow-sm: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 10px 24px -16px rgba(0, 0, 0, .7);
    --hero-glow: #171c24;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #101317;
  --bg-2: #0b0d10;
  --stage: #0a0c0f;
  --surface: #181c22;
  --tint: #20252d;
  --ink: #f1f3f5;
  --ink-2: #b9bfc9;
  --ink-3: #969da8;
  --ink-pre: #7d8694;
  --line: #2a3038;
  --line-strong: #414853;
  --accent: #ff6a1f;
  --accent-ink: #ff8f55;
  --on-accent: #0b0d10;
  --free-bg: #12382f;
  --free-ink: #93dcc6;
  --ai-bg: #3a2f0d;
  --ai-ink: #f2d27a;
  --ai-line: #6b5618;
  --butter: #c79a35;
  --shadow: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 24px 48px -24px rgba(0, 0, 0, .7);
  --shadow-sm: 0 1px 0 rgba(255, 255, 255, .03) inset, 0 10px 24px -16px rgba(0, 0, 0, .7);
  --hero-glow: #171c24;
  color-scheme: dark;
}

/* The inverse of the page: dark on the light page, light on the dark one. Used for the Pro plan. */
.inverse {
  --bg: #0e1116;
  --surface: #14181d;
  --tint: #20252d;
  --ink: #f1f3f5;
  --ink-2: #b9bfc9;
  --ink-3: #969da8;
  --line: #2a3038;
  --line-strong: #414853;
  --accent-ink: #ff8f55;
  --ai-bg: #3a2f0d;
  --ai-ink: #f2d27a;
  --ai-line: #6b5618;
  background: var(--surface);
  color: var(--ink);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .inverse {
    --bg: #f6f7f9;
    --surface: #f1f3f5;
    --tint: #e2e5ea;
    --ink: #0e1116;
    --ink-2: #434a55;
    --ink-3: #5b6370;
    --line: #d0d4da;
    --line-strong: #a9b0bb;
    --accent-ink: #a83c07;
    --ai-bg: #fff0c2;
    --ai-ink: #5a4200;
    --ai-line: #dfbf5e;
  }
}
:root[data-theme="dark"] .inverse {
  --bg: #f6f7f9;
  --surface: #f1f3f5;
  --tint: #e2e5ea;
  --ink: #0e1116;
  --ink-2: #434a55;
  --ink-3: #5b6370;
  --line: #d0d4da;
  --line-strong: #a9b0bb;
  --accent-ink: #a83c07;
  --ai-bg: #fff0c2;
  --ai-ink: #5a4200;
  --ai-line: #dfbf5e;
}

/* ---------- Base ---------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 16px;
  scrollbar-color: var(--line-strong) var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.55 var(--font-ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}

h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-underline-offset: .2em; text-decoration-thickness: 1px; }
strong, b { font-weight: 650; }
button { font: inherit; color: inherit; }
img, svg { max-width: 100%; }
code, kbd {
  font: .88em var(--font-min);
  background: var(--tint);
  border-radius: 4px;
  padding: .1em .35em;
  overflow-wrap: anywhere;
}
[hidden] { display: none !important; }

::selection { background: var(--accent); color: var(--on-accent); }

:focus-visible {
  outline: 2px solid var(--accent-ink);
  outline-offset: 3px;
  border-radius: 4px;
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.ic {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.ic-fill { fill: currentColor; stroke: none; }

.vh {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 10;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 600;
}
.skip:focus { top: 12px; }

.wrap {
  width: min(100% - 2 * var(--gutter), 1280px);
  margin-inline: auto;
}

/* The minute tag: the one use of the accent. */
.cite {
  display: inline-block;
  font: 500 .74rem/1.5 var(--font-min);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--accent-ink);
  border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent);
  border-radius: 4px;
  padding: 0 .45em;
  transition: background-color .25s, color .25s, border-color .25s;
}
.cite-on {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

/* Free, Pro and AI are always words, never only a colour. */
.tag {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: .12rem .58rem;
  border-radius: 999px;
  font: 650 .74rem/1.5 var(--font-ui);
  letter-spacing: .005em;
}
.tag-free { background: var(--free-bg); color: var(--free-ink); }
.tag-pro { background: var(--ink); color: var(--bg); }
.tag-ai { background: var(--ai-bg); color: var(--ai-ink); box-shadow: inset 0 0 0 1px var(--ai-line); }
.tag-plain { color: var(--ink-2); box-shadow: inset 0 0 0 1px var(--line-strong); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* A caveat in the margin: the things a sales page usually leaves out. */
.mn {
  font-size: .88rem;
  line-height: 1.5;
  color: var(--ink-2);
  border-left: 2px solid var(--line-strong);
  padding-left: .85rem;
  text-wrap: pretty;
}
.mn b { color: var(--ink); }
.mn a { color: var(--ink); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  min-height: 46px;
  padding: 0 1.15em;
  border: 1px solid transparent;
  border-radius: 9px;
  font: 600 .98rem/1.2 var(--font-ui);
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: background-color .2s, border-color .2s, color .2s;
}
.btn .ic { transition: transform .35s var(--ease); }
.btn:hover .ic { transform: translateX(3px); }
.btn-primary:hover .ic-down { transform: translateY(2px); }
.btn-sm { min-height: 40px; font-size: .9rem; padding: 0 .95em; }

.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: color-mix(in srgb, var(--ink) 86%, var(--bg)); }

.btn-quiet { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn-quiet:hover { border-color: var(--ink); background: color-mix(in srgb, var(--ink) 6%, transparent); }

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
}
.link-arrow:hover { text-decoration-color: currentColor; }
.link-arrow .ic { transition: transform .35s var(--ease); }
.link-arrow:hover .ic { transform: translateX(3px); }

/* ---------- Header ---------- */

.site-head { position: relative; z-index: 2; }
.head-row {
  display: flex;
  align-items: center;
  gap: 10px 22px;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font: 700 1.08rem/1 var(--font-display);
  letter-spacing: -.01em;
  text-decoration: none;
}
.mark { width: 26px; height: 26px; flex: none; }
.mark-sm { width: 18px; height: 18px; }
.site-nav { display: flex; gap: 4px; margin-left: auto; }
.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 11px;
  border-radius: 8px;
  font-size: .93rem;
  color: var(--ink-2);
  text-decoration: none;
  transition: color .2s, background-color .2s;
}
.site-nav a:hover { color: var(--ink); background: color-mix(in srgb, var(--ink) 6%, transparent); }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }

.theme-btn {
  display: none;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: transparent;
  cursor: pointer;
  transition: border-color .2s, background-color .2s;
}
.js .theme-btn { display: inline-grid; }
.theme-btn:hover { border-color: var(--ink); background: color-mix(in srgb, var(--ink) 6%, transparent); }
.theme-btn .ic { width: 18px; height: 18px; }
.theme-btn .i-sun { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-btn .i-sun { display: block; }
  :root:not([data-theme="light"]) .theme-btn .i-moon { display: none; }
}
:root[data-theme="dark"] .theme-btn .i-sun { display: block; }
:root[data-theme="dark"] .theme-btn .i-moon { display: none; }

/* ---------- Hero ---------- */

.hero {
  padding: clamp(10px, 1.6vw, 20px) 0 clamp(48px, 5.4vw, 76px);
  background: radial-gradient(64% 56% at 24% 70%, var(--hero-glow) 0%, transparent 72%);
}

.hero h1 {
  font: 700 clamp(2.15rem, 4.7vw, 4.1rem)/1.03 var(--font-display);
  letter-spacing: -.032em;
  text-wrap: balance;
}
.h1-pre { color: var(--ink-pre); }
@media (min-width: 900px) { .h1-pre { display: block; } }

.hero-sub {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: 20px clamp(24px, 6vw, 96px);
  align-items: start;
  margin-top: clamp(14px, 1.5vw, 18px);
}
.hero .lede { font-size: 1.1rem; line-height: 1.5; color: var(--ink-2); max-width: 58ch; text-wrap: pretty; }
.hero-facts { margin-top: 12px; font-size: .88rem; line-height: 1.5; color: var(--ink-3); max-width: 56ch; text-wrap: pretty; }
.hero-facts b { color: var(--ink-2); font-weight: 600; }

.scene-fig { margin-top: clamp(24px, 2.6vw, 34px); }
.scene-fig figcaption { margin-top: 14px; font-size: .86rem; color: var(--ink-3); max-width: 92ch; text-wrap: pretty; }

.scene-fig figcaption a { color: var(--ink-2); }
.demo-reset {
  border: 0;
  background: none;
  padding: 0;
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: .2em;
  cursor: pointer;
}
.demo-reset:hover { text-decoration-color: currentColor; }

/* The opening picture: save it (free), then study it (Pro). */
.scene {
  --pos: .2868;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}
.scene:has(#at-b:checked) { --pos: .5118; }
.scene:has(#at-c:checked) { --pos: .7399; }
@media (min-width: 1200px) {
  .scene { grid-template-columns: minmax(0, 1.14fr) 26px minmax(0, 1fr); gap: 0 10px; align-items: stretch; }
  .half { grid-template-rows: auto 1fr; }
}

.half { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; align-content: start; min-width: 0; }
.half-head { display: grid; grid-template-columns: minmax(0, 1fr); gap: 6px; align-content: start; font: 700 1.05rem/1.2 var(--font-display); letter-spacing: -.01em; }
.doc-name { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; min-height: 36px; }
.half-n { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--ink); color: var(--bg); font: 700 .76rem/1 var(--font-ui); }
.step-arrow { display: grid; place-items: center; color: var(--ink-3); }
.step-arrow .ic { width: 22px; height: 22px; stroke-width: 2; transform: rotate(90deg); }
@media (min-width: 1200px) {
  .step-arrow { align-self: stretch; padding-top: 38px; align-content: center; }
  .step-arrow .ic { transform: none; }
}

/* A drawn browser window on an invented course site. */
.browser {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
}
.br-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px 6px 10px;
  border-bottom: 1px solid var(--line);
  background: var(--tint);
  border-radius: 11px 11px 0 0;
  min-width: 0;
}
.br-dots { display: flex; gap: 4px; flex: none; }
.br-dots i { width: 7px; height: 7px; border-radius: 50%; background: var(--line-strong); }
.br-tabs { display: flex; gap: 2px; flex: none; }
.br-tab { position: relative; cursor: pointer; }
.br-tab input { position: absolute; left: 50%; top: 50%; opacity: 0; width: 1px; height: 1px; margin: 0; }
.br-tab span {
  display: block;
  padding: 5px 10px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: .78rem;
  line-height: 1.4;
  color: var(--ink-2);
  white-space: nowrap;
  transition: background-color .2s, color .2s;
}
.br-tab:hover span { color: var(--ink); }
.br-tab input:checked + span { background: var(--surface); border-color: var(--line); color: var(--ink); font-weight: 600; }
.br-tab input:focus-visible + span { outline: 2px solid var(--accent-ink); outline-offset: 2px; }
.br-url {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font: 400 .7rem/1.5 var(--font-min);
  color: var(--ink-3);
}
.url-course, .scene:has(#pg-course:checked) .url-lecture { display: none; }
.scene:has(#pg-course:checked) .url-course { display: inline; }
.br-ext { display: grid; place-items: center; width: 28px; height: 26px; flex: none; border-radius: 6px; background: color-mix(in srgb, var(--ink) 10%, transparent); }
.br-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 300px); gap: 10px; padding: 10px; align-items: start; }

.course, .scene:has(#pg-course:checked) .lecture { display: none; }
.scene:has(#pg-course:checked) .course { display: block; }
.course { padding: 4px 4px 0; min-width: 0; }
.course-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.course-list li { display: grid; gap: 3px; align-content: start; font-size: .76rem; line-height: 1.3; min-width: 0; }
.course-list .thumb { display: grid; place-items: center; aspect-ratio: 16 / 9; border-radius: 6px; border: 1px solid var(--line); background: var(--tint); color: var(--ink-3); }
.course-list b { font-weight: 600; color: var(--ink); }
.course-list i { font: 400 .68rem/1.4 var(--font-min); color: var(--ink-3); }
.pg-files { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; padding: 0 4px 8px; font-size: .74rem; color: var(--ink-3); }
.pg-files span { display: inline-flex; align-items: center; gap: 4px; }
.pg-files span + span { color: var(--ink-2); text-decoration: underline; text-decoration-color: var(--line-strong); }
.pg-files .ic { width: 13px; height: 13px; }

/* The popup: a working copy, in the real one's own colours and type. */
.xpop {
  --p-bg: #f5f3ee;
  --p-surface: #fffefb;
  --p-sunken: #ebe8e0;
  --p-line: #dfdbd1;
  --p-line2: #c6c1b4;
  --p-ink: #1c1b18;
  --p-ink2: #4f4c45;
  --p-ink3: #6c685f;
  --p-mark: #e8590c;
  --p-ok: #2a6a45;
  --p-btn: #1c1b18;
  --p-btnfg: #fffefb;
  --p-serif: "Iowan Old Style", Charter, "Sitka Text", Constantia, Cambria, Georgia, serif;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 448px;
  min-width: 0;
  overflow: hidden;
  background: var(--p-bg);
  color: var(--p-ink);
  border: 1px solid var(--p-line2);
  border-radius: 10px;
  box-shadow: 0 14px 32px -12px rgba(14, 17, 22, .32);
  font: 400 .8rem/1.4 var(--font-ui);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .xpop {
    --p-bg: #151515; --p-surface: #1e1e1e; --p-sunken: #0e0e0e; --p-line: #2d2d2d; --p-line2: #474747;
    --p-ink: #eeece7; --p-ink2: #bcb9b2; --p-ink3: #96938d; --p-mark: #f0661a; --p-ok: #7cc79a; --p-btn: #eeece7; --p-btnfg: #151515;
  }
}
:root[data-theme="dark"] .xpop {
  --p-bg: #151515; --p-surface: #1e1e1e; --p-sunken: #0e0e0e; --p-line: #2d2d2d; --p-line2: #474747;
  --p-ink: #eeece7; --p-ink2: #bcb9b2; --p-ink3: #96938d; --p-mark: #f0661a; --p-ok: #7cc79a; --p-btn: #eeece7; --p-btnfg: #151515;
}
.xpop :focus-visible { outline: 2px solid var(--p-mark); outline-offset: 2px; border-radius: 6px; }
.xpop button { font-family: var(--font-ui); cursor: pointer; }
.xpop .live-dot { background: var(--p-mark); }
.xp-head { display: flex; align-items: center; gap: 8px; padding: 9px 12px; border-bottom: 1px solid var(--p-line); font-size: .86rem; flex: none; }
.xp-view { flex: 1; min-height: 0; display: flex; flex-direction: column; overflow-y: auto; }
.xp-course, .scene:has(#pg-course:checked) .xp-lecture { display: none; }
.scene:has(#pg-course:checked) .xp-course { display: flex; }
.xp-hero { padding: 12px 12px 12px; }
.xp-eyebrow { display: flex; align-items: center; gap: 7px; font: 500 .66rem/1.3 var(--font-min); letter-spacing: .09em; text-transform: uppercase; color: var(--p-ink3); }
.xp-title { margin-top: 5px; font: 500 1.06rem/1.2 var(--p-serif); letter-spacing: -.012em; }
.xp-sub { margin-top: 4px; font-size: .78rem; color: var(--p-ink2); }
.xp-action { margin-top: 11px; display: grid; gap: 6px; }
.xp-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 38px;
  padding: 0 14px;
  border: 0;
  border-radius: 8px;
  background: var(--p-btn);
  color: var(--p-btnfg);
  font-size: .84rem;
  font-weight: 600;
}
.xp-btn:disabled { opacity: .45; cursor: default; }
.xp-busy {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 4px 0 12px;
  border: 1px solid var(--p-line2);
  border-radius: 8px;
  background: var(--p-surface);
  overflow: hidden;
}
.xp-busy-text { flex: 1; min-width: 0; font: 500 .74rem/1.3 var(--font-min); font-variant-numeric: tabular-nums; white-space: nowrap; }
.xp-fill { position: absolute; left: 0; bottom: 0; height: 3px; width: 0; background: var(--p-mark); transition: width .6s linear; }
.xp-done { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 5px; min-height: 38px; font-size: .76rem; color: var(--p-ink2); }
.xp-done .xp-link { padding: 4px 2px; margin-left: auto; }
.xp-done .ic { width: 14px; height: 14px; stroke-width: 2.4; color: var(--p-ok); }
.xp-link {
  border: 0;
  background: none;
  min-height: 30px;
  padding: 4px 6px;
  color: var(--p-ink);
  font-size: .76rem;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--p-line2);
  text-underline-offset: .2em;
  white-space: nowrap;
}
.xp-link:hover { text-decoration-color: currentColor; }
.xp-link:disabled { color: var(--p-ok); text-decoration: none; cursor: default; }
.xp-file { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 8px; padding: 7px 9px; border-radius: 7px; background: var(--p-sunken); font: 400 .7rem/1.4 var(--font-min); }
.xp-file span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.xp-file i, .xp-files i, .xp-list i { font-style: normal; color: var(--p-ink3); white-space: nowrap; }
.xp-file .ic { width: 15px; height: 15px; color: var(--p-ink3); }
.xp-row { display: flex; align-items: center; gap: 10px; min-height: 48px; padding: 7px 12px; border-top: 1px solid var(--p-line); }
.xp-row > .ic { width: 17px; height: 17px; color: var(--p-ink3); stroke-width: 1.5; }
.xp-row-main { flex: 1; min-width: 0; display: grid; }
.xp-row-main b { font-weight: 600; font-size: .82rem; }
.xp-row-main span { font-size: .74rem; color: var(--p-ink2); }
.xp-rowbtn { width: 100%; border: 0; border-top: 1px solid var(--p-line); background: none; color: inherit; font-size: inherit; text-align: left; }
.xp-rowbtn:hover { background: var(--p-surface); }
.xp-chev { transition: transform .2s; }
.xp-rowbtn[aria-expanded="true"] .xp-chev { transform: rotate(90deg); }
.xp-chip {
  flex: none;
  min-height: 32px;
  padding: 0 11px;
  border: 1px solid var(--p-line2);
  border-radius: 7px;
  background: var(--p-surface);
  color: var(--p-ink);
  font-size: .76rem;
  font-weight: 600;
  white-space: nowrap;
}
.xp-chip:hover { border-color: var(--p-ink); }
.xp-files { padding: 0 8px 8px 39px; }
.xp-files li { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 6px; font: 400 .7rem/1.4 var(--font-min); }
.xp-files li span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.xp-list { margin-top: 6px; }
.xp-list li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; padding: 5px 0; border-top: 1px solid var(--p-line); font-size: .76rem; }
.xp-list li:first-child { border-top: 0; }
.xp-list span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.xp-list i { font: 400 .68rem/1.6 var(--font-min); }
.xp-note { font-size: .74rem; color: var(--p-ink2); min-height: 2.1em; }
.xp-dock { display: flex; flex: none; border-top: 1px solid var(--p-line); background: var(--p-surface); font-size: .72rem; font-weight: 500; color: var(--p-ink2); }
.xp-dock span { flex: 1; padding: 9px 4px; text-align: center; border-right: 1px solid var(--p-line); white-space: nowrap; }
.xp-dock span:last-child { flex: 0 0 40px; border-right: 0; display: grid; place-items: center; }
.xp-dock i { font-style: normal; font-weight: 400; color: var(--p-ink3); }
.xp-dock .ic { width: 15px; height: 15px; }

/* The sheet "Download all" opens over the popup. */
.xp-sheet { position: absolute; inset: 0; z-index: 2; display: flex; flex-direction: column; background: var(--p-bg); outline: none; }
.rv-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; padding: 10px 6px 8px 12px; border-bottom: 1px solid var(--p-line); flex: none; }
.rv-title { font: 500 1.02rem/1.2 var(--p-serif); letter-spacing: -.01em; }
.rv-sum { margin-top: 2px; font-size: .74rem; color: var(--p-ink2); }
.rv-close { display: grid; place-items: center; width: 32px; height: 32px; flex: none; border: 0; border-radius: 6px; background: none; color: var(--p-ink2); }
.rv-close:hover { background: var(--p-sunken); color: var(--p-ink); }
.rv-close .ic { width: 16px; height: 16px; }
.rv-body { flex: 1; min-height: 0; overflow-y: auto; padding: 8px 12px; display: grid; gap: 8px; align-content: start; }
.rv-where { display: flex; align-items: center; gap: 7px; padding: 6px 9px; border-radius: 7px; background: var(--p-sunken); font-size: .74rem; font-weight: 600; }
.rv-where .ic { width: 14px; height: 14px; color: var(--p-ink3); }
.rv-group-h { display: flex; align-items: center; gap: 6px; padding-bottom: 4px; border-bottom: 1px solid var(--p-ink); font-size: .78rem; font-weight: 600; }
.rv-count { padding: 0 6px; border-radius: 5px; background: var(--p-sunken); font: 500 .66rem/1.7 var(--font-min); color: var(--p-ink2); }
.rv-hint { margin-top: 4px; font-size: .7rem; color: var(--p-ink3); }
.rv-item { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 2px 8px; align-items: center; padding: 5px 0; border-bottom: 1px solid var(--p-line); cursor: pointer; }
.rv-item:last-child { border-bottom: 0; }
.rv-item input { width: 16px; height: 16px; margin: 0; accent-color: var(--p-btn); }
.rv-name { font: 500 .7rem/1.4 var(--font-min); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rv-meta { font-size: .68rem; color: var(--p-ink3); white-space: nowrap; }
.rv-meta:has(.rv-tag) { grid-column: 2 / -1; }
.rv-tag { padding: 0 5px; border: 1px solid var(--p-line2); border-radius: 4px; color: var(--p-ink2); }
.rv-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 8px 12px; border-top: 1px solid var(--p-line); background: var(--p-surface); flex: none; }
.rv-foot .xp-btn { width: auto; min-height: 34px; }
.rv-foot .xp-chip { min-height: 34px; }

/* The lecture */
.lecture {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 12px 6px;
  box-shadow: var(--shadow-sm);
  container-type: inline-size;
}
.lecture-title {
  display: flex;
  flex-wrap: wrap;
  gap: 0 .6em;
  font-size: .8rem;
  line-height: 1.4;
  color: var(--ink-3);
  padding: 0 2px 10px;
}
.lecture-title span + span { color: var(--ink-2); }

/* The slide may stretch from 16:9 towards 4:3 to stay level with the cards, no further. */
.lecture .frame { flex: 1 0 auto; max-height: 66cqw; }
.frame {
  position: relative;
  aspect-ratio: 16 / 9;
  container-type: inline-size;
  background: #dfe3e8;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.slide {
  position: absolute;
  inset: 0;
  padding: 7cqw 6cqw;
  color: #12151a;
  background: linear-gradient(180deg, #f1f3f6, #e1e5ea);
  opacity: 0;
  transition: opacity .45s ease;
}
.slide-on,
.scene:has(#at-a:checked) .slide-a,
.scene:has(#at-b:checked) .slide-b,
.scene:has(#at-c:checked) .slide-c { opacity: 1; }

.slide-n { font: 500 2.5cqw/1 var(--font-min); color: #515a68; letter-spacing: .02em; }
.slide-h { margin-top: 2.2cqw; font: 700 5.2cqw/1.08 var(--font-display); letter-spacing: -.02em; max-width: 46%; }
.slide-p { margin-top: 2.2cqw; font-size: 2.9cqw; line-height: 1.35; color: #3b424d; max-width: 42%; }
.slide-f { margin-top: 3cqw; font: 600 3.4cqw/1.2 var(--font-min); }
.slide-g { position: absolute; right: 5cqw; top: 9cqw; width: 42cqw; height: 25.2cqw; max-width: none; }
.slide-g-ring { top: 8cqw; width: 38cqw; height: 22.8cqw; right: 6cqw; }
.axis { position: absolute; font-size: 2.3cqw; line-height: 1; color: #515a68; white-space: nowrap; }
.axis-x { right: 6cqw; top: 35.4cqw; }
.axis-y { left: 52cqw; top: 6.6cqw; }

.caption {
  position: absolute;
  left: 50%;
  bottom: 3.6cqw;
  width: max-content;
  max-width: 88%;
  transform: translateX(-50%);
  background: rgba(8, 10, 13, .88);
  color: #fff;
  font-size: clamp(.7rem, 2.9cqw, .92rem);
  line-height: 1.35;
  text-align: center;
  text-wrap: balance;
  padding: .4em .8em;
  border-radius: 4px;
  opacity: 0;
  transition: opacity .45s ease;
}
.scene:has(#at-a:checked) .cap-a,
.scene:has(#at-b:checked) .cap-b,
.scene:has(#at-c:checked) .cap-c { opacity: 1; }

.transport {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: start;
  gap: 12px;
  padding: 14px 22px 0 4px;
}
.tp-play { color: var(--ink); font-size: .95rem; line-height: 20px; }
.tp-play .ic { vertical-align: -3px; }
.tp-time { font: 500 .78rem/20px var(--font-min); font-variant-numeric: tabular-nums; color: var(--ink-3); white-space: nowrap; }
.now { display: none; color: var(--ink); }
.scene:has(#at-a:checked) .now-a,
.scene:has(#at-b:checked) .now-b,
.scene:has(#at-c:checked) .now-c { display: inline; }

.track { position: relative; height: 58px; }
.rail {
  position: absolute;
  left: 0;
  right: 0;
  top: 8px;
  height: 4px;
  border-radius: 2px;
  background: var(--line-strong);
  overflow: hidden;
}
.rail-fill {
  display: block;
  height: 100%;
  background: var(--ink-2);
  transform-origin: 0 50%;
  transform: scaleX(var(--pos));
  transition: transform .7s var(--ease);
}
.head {
  position: absolute;
  top: 1px;
  left: calc(var(--pos) * 100%);
  width: 4px;
  height: 18px;
  margin-left: -2px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--surface);
  transition: left .7s var(--ease);
}
.tick {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  padding: 26px 2px 6px;
  cursor: pointer;
}
.tick::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 5px;
  width: 2px;
  height: 10px;
  margin-left: -1px;
  background: var(--accent);
  opacity: .7;
}
.tick-a { left: 28.68%; }
.tick-b { left: 51.18%; }
.tick-c { left: 73.99%; }
.tick input { position: absolute; left: 50%; top: 30px; opacity: 0; width: 1px; height: 1px; margin: 0; }
.tick .cite { line-height: 1.7; padding: 0 .5em; }
.tick:hover .cite { border-color: var(--accent); }
.tick input:checked + .cite { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.tick input:focus-visible + .cite { outline: 2px solid var(--ink); outline-offset: 3px; }

/* What the lecture becomes */
.made {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px 18px;
  box-shadow: var(--shadow-sm);
  transition: border-color .35s;
  min-width: 0;
}
.browser .lecture { border: 0; border-radius: 0; box-shadow: none; background: none; padding: 4px 4px 0; }
.browser .transport { grid-template-columns: auto minmax(0, 1fr); padding-right: 26px; }
.browser .tick .cite { font-size: .7rem; padding: 0 .4em; }

/* The reading edition comes first and is the largest. */
.made-read { padding: 16px 18px 18px; }
.made-read .made-kind b { font: 700 1rem/1.2 var(--font-display); color: var(--ink); margin-right: .5em; }
.made-read-h { margin-top: 10px; font: 600 1.22rem/1.22 var(--font-said); letter-spacing: -.008em; }
.made-slide { display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline; margin-top: 10px; padding: 6px 10px; border-radius: 6px; background: var(--tint); font-size: .8rem; color: var(--ink-2); }
.made-slide b { font: 600 .72rem/1.4 var(--font-min); color: var(--ink-3); }
.made-read .para p { font-size: 1rem; line-height: 1.55; }
.made-read .para a.cite { text-decoration: none; }
.made-read .para a.cite:hover { border-color: var(--accent); }
.made-more { margin-top: 12px; font-size: .88rem; }

.scene:has(#at-a:checked) .made-guide,
.scene:has(#at-b:checked) .made-quiz,
.scene:has(#at-c:checked) .made-card { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow-sm); }

.scene:has(#at-a:checked) .cite-a,
.scene:has(#at-b:checked) .cite-b,
.scene:has(#at-c:checked) .cite-c { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

.made-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.made-kind { font-size: .78rem; line-height: 1.4; color: var(--ink-3); }
label.cite { cursor: pointer; line-height: 1.7; }
label.cite:hover { border-color: var(--accent); }

.made-q {
  margin-top: 12px;
  font: 600 1.3rem/1.27 var(--font-said);
  letter-spacing: -.005em;
  text-wrap: pretty;
}
.made-q-sm { font-size: 1.02rem; line-height: 1.32; margin-top: 10px; }
.made-p { margin-top: 12px; font-size: .9rem; line-height: 1.5; color: var(--ink-2); }
.made-ask { margin-top: 14px; font-size: .86rem; line-height: 1.5; color: var(--ink-2); }
.made-ask b { color: var(--ink); margin-right: .3em; }

.said { margin-top: 14px; padding-left: 12px; border-left: 1px solid var(--line-strong); }
.said-label { display: block; font-size: .74rem; line-height: 1.4; color: var(--ink-3); }
.said p { margin-top: 3px; font: italic 400 .96rem/1.45 var(--font-said); color: var(--ink); }

.opts { display: grid; gap: 6px; margin-top: 12px; }
.opt {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: .86rem;
  line-height: 1.4;
  color: var(--ink-2);
  cursor: pointer;
  transition: border-color .2s, color .2s, background-color .2s;
}
.opt input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; }
.opt-k { font: 600 .76rem/1 var(--font-min); color: var(--ink-3); }
.opt:hover { border-color: var(--line-strong); color: var(--ink); }
.opt:has(input:checked) { border-color: var(--ink-2); color: var(--ink); background: var(--tint); }
.opt:has(input:focus-visible) { outline: 2px solid var(--accent-ink); outline-offset: 2px; }
.why { display: none; margin-top: 10px; font-size: .86rem; line-height: 1.45; color: var(--ink-2); }
.why b { color: var(--ink); }
.made-quiz:has(#hq-a:checked) .why-a,
.made-quiz:has(#hq-b:checked) .why-b,
.made-quiz:has(#hq-c:checked) .why-c { display: block; }

.flip { margin-top: 12px; }
.flip summary {
  display: inline-flex;
  list-style: none;
  cursor: pointer;
  font-size: .86rem;
  font-weight: 600;
  line-height: 1.4;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  transition: border-color .2s, background-color .2s;
}
.flip summary::-webkit-details-marker { display: none; }
.flip summary:hover { border-color: var(--ink-2); background: var(--tint); }
.flip[open] summary { color: var(--ink-3); }
.flip p { margin-top: 10px; font: 400 .98rem/1.45 var(--font-said); }

@media (prefers-reduced-motion: no-preference) {
  .made { animation: develop .9s var(--ease) backwards; }
  .made-guide { animation-delay: .25s; }
  .made-quiz { animation-delay: .4s; }
  .made-card { animation-delay: .55s; }
  .head { animation: sweep 1.2s var(--ease) backwards .1s; }
  .scene .rail-fill { animation: fill 1.2s var(--ease) backwards .1s; }
}
@keyframes develop {
  from { opacity: 0; transform: translateY(14px); filter: blur(8px); }
}
@keyframes sweep { from { left: 0; } }
@keyframes fill { from { transform: scaleX(0); } }

.demo-nojs { margin-top: 12px; padding: 12px 14px; border: 1px solid var(--line-strong); border-radius: 10px; font-size: .95rem; color: var(--ink-2); max-width: 92ch; }
.demo-nojs b { color: var(--ink); }
.js .demo-nojs { display: none; }

/* Download, transcribe, read: the three numbered steps above the browser. */
.steps3 { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 6px; }
.steps3 li { display: flex; align-items: center; gap: 6px; }
.steps3 li + li::before { content: ""; width: 14px; border-top: 2px solid var(--line-strong); }
.steps3 button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 3px 9px 3px 5px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: none;
  font: 700 .95rem/1.2 var(--font-display);
  color: var(--ink-2);
  cursor: pointer;
  transition: background-color .2s, border-color .2s, color .2s;
}
.steps3 button:hover { background: var(--surface); border-color: var(--line); color: var(--ink); }
.steps3 button[aria-current="step"] { background: var(--surface); border-color: var(--line-strong); color: var(--ink); box-shadow: var(--shadow-sm); }
.steps3 .half-n { background: var(--ink-3); }
.steps3 button[aria-current="step"] .half-n { background: var(--accent); color: var(--on-accent); }
.steps3 .is-done .half-n { background: var(--ink); }
.scene:not(.is-live) .steps3 button { cursor: default; }
.clicks { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 6px; min-height: 24px; font: 400 .88rem/1.4 var(--font-ui); letter-spacing: 0; color: var(--ink-2); }
.clicks b { font-weight: 700; color: var(--ink); }
.clicks .tag { margin-left: 4px; }
.doc-state { display: flex; align-items: center; min-height: 24px; font: 400 .88rem/1.4 var(--font-ui); letter-spacing: 0; color: var(--ink-2); }
.doc-state span { display: inline-flex; align-items: center; gap: 5px; }
.doc-state .ic { width: 14px; height: 14px; stroke-width: 2.4; }
.scene[data-state="3"] .doc-state { color: var(--free-ink); font-weight: 650; }
.scene[data-state="3"] .made-read { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow-sm); }
.made-read:focus { outline: none; }
.made-read:focus-visible { outline: 2px solid var(--accent-ink); outline-offset: 3px; }

/* The steps inside the popup: one main button at a time, moving down the lecture's path. */
.xp-pro { padding: 7px 12px 6px; border-top: 1px solid var(--p-line); font: 500 .62rem/1.3 var(--font-min); letter-spacing: .09em; text-transform: uppercase; color: var(--p-ink3); }
.xp-step { padding-bottom: 2px; }
.xp-step .xp-row { border-top: 0; min-height: 40px; padding-top: 3px; padding-bottom: 3px; }
.xp-step > .xp-btn, .xp-step > .xp-busy, .xp-step > .xp-chip { margin: 2px 12px 8px; width: calc(100% - 24px); }
.xp-chip-wide { min-height: 36px; }
.xp-ok { width: 15px; height: 15px; flex: none; stroke-width: 2.4; color: var(--p-ok); }
.xp-row > .xp-ok { color: var(--p-ok); stroke-width: 2.4; width: 15px; height: 15px; }
.xp-busy-plain { padding-right: 12px; }
.xp-busy-plain .xp-busy-text { font-family: var(--font-ui); font-size: .76rem; color: var(--p-ink2); }
.xp-fill-run { width: 35%; }
@media (prefers-reduced-motion: no-preference) {
  .xp-fill-run { animation: xp-slide 1.3s ease-in-out infinite; }
}
@keyframes xp-slide { from { left: -35%; } to { left: 100%; } }

/* And then, if you want more: the slides, and study material. */
.more-row { margin-top: 14px; padding-top: 16px; border-top: 1px solid var(--line); min-width: 0; }
@media (min-width: 1200px) { .more-row { grid-column: 1 / -1; } }
.more-head { font-size: .98rem; color: var(--ink-2); }
.more-head b { font: 700 1.05rem/1.2 var(--font-display); letter-spacing: -.01em; color: var(--ink); margin-right: .3em; }
.more-head a { color: var(--ink); text-decoration-color: var(--line-strong); }
.more-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 3fr); gap: 12px; margin-top: 12px; align-items: start; }
.more-a, .more-b { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; min-width: 0; }
.more-top { display: grid; gap: 6px; align-content: start; min-height: 6.6rem; }
.more-sub { font: 400 .88rem/1.4 var(--font-ui); color: var(--ink-2); text-wrap: pretty; }
.more-title { font: 700 1rem/1.25 var(--font-display); letter-spacing: -.01em; text-wrap: balance; }
.more-cost { font-size: .8rem; font-weight: 600; color: var(--ink-2); align-self: center; }
.more-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; align-items: start; }
.more-cards .made-q { font-size: 1.06rem; line-height: 1.28; margin-top: 10px; }
.more-cards .made-q-sm { font-size: .98rem; }
.more-cards .said { margin-top: 10px; }
.more-cards .said p { font-size: .9rem; }
.sp-mini { margin-top: 8px; display: grid; }
.sp-mini li { display: grid; grid-template-columns: 1.5em minmax(0, 1fr) auto; gap: 8px; align-items: baseline; padding: 6px 0; border-top: 1px solid var(--line); font-size: .84rem; line-height: 1.35; color: var(--ink-2); }
.sp-mini li:first-child { border-top: 0; color: var(--ink); font-weight: 600; }
.sp-mini .n { font: 500 .72rem/1.5 var(--font-min); color: var(--ink-3); }
.made-sp .made-p { margin-top: 8px; font-size: .84rem; }
.made-sp .made-more, .made-read .made-more { margin-top: 10px; font-size: .88rem; }

/* ---------- Read the lecture ---------- */

.read { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.read-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 36px clamp(28px, 5vw, 72px); align-items: start; }
.read-copy { display: grid; gap: 18px; align-content: start; }
.read h2 { font-size: clamp(2.05rem, 4.3vw, 3.5rem); }
.read-lede { font-size: 1.12rem; line-height: 1.5; color: var(--ink-2); max-width: 46ch; text-wrap: pretty; }
.read-fact { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; padding: 14px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line); }
.read-fact b { font: 700 clamp(1.3rem, 2.2vw, 1.62rem)/1.15 var(--font-display); letter-spacing: -.022em; }
.read-fact .ic { width: 1.2em; height: 1.2em; align-self: center; color: var(--ink-3); stroke-width: 2; }
.read-fact span { width: 100%; font-size: .9rem; color: var(--ink-3); }
.easy { display: grid; gap: 0; counter-reset: easy; }
.easy li { display: grid; grid-template-columns: 1.7rem minmax(0, 1fr); gap: 0 8px; align-items: baseline; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 1.02rem; }
.easy li .ic { width: 18px; height: 18px; stroke-width: 2.4; color: var(--free-ink); align-self: center; }
.easy b { font-weight: 650; }
.easy span span { color: var(--ink-2); }
.read-sub { font: 700 1rem/1.3 var(--font-display); }
.uses { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 20px; }
.uses li { font-size: .97rem; color: var(--ink-2); padding-left: 14px; border-left: 2px solid var(--line-strong); text-wrap: pretty; }
.uses b { display: block; color: var(--ink); font-weight: 650; }
.read-extra { padding: 12px 14px; border-radius: 10px; background: var(--ai-bg); color: var(--ai-ink); box-shadow: inset 0 0 0 1px var(--ai-line); font-size: .95rem; line-height: 1.45; text-wrap: pretty; }
.read-extra b { font-weight: 700; }
.read-cta { display: grid; gap: 10px; }
.read-trial { font-size: .92rem; color: var(--ink-2); }
.read-trial b { color: var(--ink); }

.read-doc { min-width: 0; display: grid; gap: 14px; }
.sheet-of-paper {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: clamp(20px, 3.4vw, 40px) clamp(18px, 3.6vw, 44px);
  min-width: 0;
}
.sheet-of-paper .paper-kind { font: 650 .76rem/1.4 var(--font-ui); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.doc-title { margin-top: 6px; font: 700 clamp(1.5rem, 2.6vw, 2.1rem)/1.12 var(--font-display); letter-spacing: -.022em; text-wrap: balance; }
.doc-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.doc-chips span { padding: 2px 11px; border: 1px solid var(--line-strong); border-radius: 999px; background: var(--surface); font-size: .82rem; color: var(--ink-2); }
.doc-chips b { color: var(--ink); font-weight: 650; }
.doc-how { margin-top: 10px; font-size: .86rem; color: var(--ink-3); }
.doc-sec { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 14px; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line-strong); }
.doc-sec h3 { font: 700 1.3rem/1.2 var(--font-display); letter-spacing: -.015em; }
.doc-sec span { font: 400 .76rem/1.4 var(--font-min); color: var(--ink-3); }
.sheet-of-paper .para { grid-template-columns: 3.4rem minmax(0, 1fr); margin-top: 14px; }
.sheet-of-paper .para p { font-size: 1.06rem; line-height: 1.62; }
.sheet-of-paper .para p b { font: 650 .92rem/1 var(--font-ui); }
.sheet-of-paper .para a.cite { text-decoration: none; margin-top: .42em; }
.sheet-of-paper .para a.cite:hover { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.doc-fade { margin-top: 14px; font-size: .88rem; color: var(--ink-3); }
.honest { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px clamp(20px, 3vw, 40px); margin-top: clamp(32px, 4vw, 52px); }

/* ---------- Sections ---------- */

.section { padding: clamp(60px, 8vw, 116px) 0; }
.band { background: var(--bg-2); }

.section-head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 14px clamp(24px, 5vw, 72px); align-items: end; }
.section h2, .closing h2 {
  font: 700 clamp(1.85rem, 3.7vw, 3.05rem)/1.06 var(--font-display);
  letter-spacing: -.028em;
  text-wrap: balance;
}
.section-head .lede { font-size: 1.08rem; line-height: 1.5; color: var(--ink-2); max-width: 54ch; text-wrap: pretty; }
.h2-part { display: inline-block; }
.kicker { font-size: .86rem; font-weight: 650; color: var(--ink-3); margin-bottom: 10px; }

/* ---------- One evening on a clock ---------- */

.path {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin-top: clamp(32px, 4vw, 52px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 6px;
}
.path li { position: relative; }
.path a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 10px;
  align-items: start;
  height: 100%;
  padding: 10px 12px 12px;
  border-radius: 9px;
  text-decoration: none;
  transition: background-color .2s;
}
.path a:hover { background: var(--tint); }
.path-n {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--bg);
  font: 700 .78rem/1 var(--font-ui);
}
.path-name { font: 700 .95rem/1.25 var(--font-display); align-self: center; }
.path .tags { grid-column: 1 / -1; }
.path li + li::before { content: ""; position: absolute; left: 0; top: 18%; bottom: 18%; border-left: 1px solid var(--line); }
.path .path-line::before { border-left: 2px solid var(--accent); top: 6%; bottom: 6%; }

.stops { position: relative; display: grid; gap: clamp(26px, 3.4vw, 40px); margin-top: clamp(36px, 4.4vw, 56px); }
.stops + .stops { margin-top: 0; }
.stop { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; scroll-margin-top: 20px; }
.stop-when { display: flex; align-items: center; gap: 12px; }
.dial { width: 52px; height: 52px; flex: none; }
.dial-face { fill: var(--surface); stroke: var(--line-strong); stroke-width: 1.6; }
.dial-wedge { fill: var(--butter); }
.dial-ticks { fill: none; stroke: var(--line-strong); stroke-width: 1.8; stroke-linecap: round; }
.dial-hour { fill: none; stroke: var(--ink); stroke-width: 3.2; stroke-linecap: round; }
.dial-min { fill: none; stroke: var(--accent); stroke-width: 2.6; stroke-linecap: round; }
.dial-pin { fill: var(--ink); }
.stop-time { font: 700 1.45rem/1 var(--font-display); letter-spacing: -.02em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.stop-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 32px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  padding: clamp(18px, 2.6vw, 30px);
  min-width: 0;
}
.stop-text { display: grid; gap: .75rem; align-content: start; min-width: 0; }
.stop-step { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; }
.step-name { font: 650 .88rem/1.4 var(--font-ui); color: var(--ink-3); margin-right: 2px; }
.stop-text h3, .after-evening h3 { font: 700 clamp(1.3rem, 1vw + 1.05rem, 1.65rem)/1.14 var(--font-display); letter-spacing: -.02em; text-wrap: balance; }
.stop-text p:not(.stop-step) { color: var(--ink-2); text-wrap: pretty; }
.stop-text strong { color: var(--ink); }
.stop .mn { align-self: start; }

@media (min-width: 860px) {
  .stops::before {
    content: "";
    position: absolute;
    left: 45px;
    top: 30px;
    bottom: 40px;
    width: 2px;
    background: var(--line-strong);
  }
  .stop { grid-template-columns: 92px minmax(0, 1fr); gap: 12px 22px; align-items: start; }
  .stop-when { position: relative; flex-direction: column; gap: 6px; padding-top: 4px; }
  .stop-time { font-size: 1.12rem; background: var(--bg-2); padding: 5px 0 7px; }
  .stop-card { grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); align-items: center; }
  .stop .mn { grid-column: 2; max-width: 74ch; }
}
@media (min-width: 1180px) {
  .stop { grid-template-columns: 92px minmax(0, 1fr) 216px; }
  .stop .mn { grid-column: 3; margin-top: clamp(18px, 2.6vw, 30px); }
}

/* The rule between what is free and what is Pro. */
.free-line {
  display: grid;
  gap: 8px;
  margin: clamp(30px, 4vw, 48px) 0;
  font: 650 1rem/1.3 var(--font-display);
  color: var(--ink);
}
.free-line::before { content: ""; grid-row: 2; border-top: 2px solid var(--accent); }
.free-line > span { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; }
.free-line > span:last-child { justify-content: flex-end; text-align: right; color: var(--ink-2); }
.free-line .ic { color: var(--ink-3); }

.after-evening {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px clamp(24px, 4vw, 56px);
  margin-top: clamp(40px, 5vw, 64px);
}
.after-evening > div { display: grid; gap: .6rem; align-content: start; padding-top: 18px; border-top: 2px solid var(--ink); }
.after-evening h3 { font-size: 1.2rem; }
.after-evening p:not(.stop-step) { color: var(--ink-2); font-size: .98rem; text-wrap: pretty; }
.drawn { margin-top: clamp(24px, 3vw, 36px); font-size: .86rem; color: var(--ink-3); max-width: 92ch; }

/* ---------- Drawings of the product ---------- */

.mock { min-width: 0; display: grid; gap: 12px; align-content: center; }
.win {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
  min-width: 0;
}
.stop-card .win { background: var(--bg); box-shadow: none; }
:root[data-theme="dark"] .stop-card .win { background: var(--tint); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .stop-card .win { background: var(--tint); } }

.ui-label { display: flex; align-items: center; gap: 6px; font-size: .7rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.live-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); flex: none; }
.ui-btn {
  display: inline-flex;
  align-items: center;
  gap: .45em;
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  font-size: .78rem;
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
}
.ui-btn-main { background: var(--ink); border-color: var(--ink); color: var(--surface); padding: 7px 14px; font-size: .84rem; }
.ui-btn-main i { font: 400 .72rem/1 var(--font-min); opacity: .75; padding-left: .8em; margin-left: .3em; border-left: 1px solid color-mix(in srgb, var(--surface) 40%, transparent); }

/* The popup */
.pop { font-size: .86rem; line-height: 1.4; }
.pop-head { display: flex; align-items: center; gap: 8px; padding: 11px 14px; border-bottom: 1px solid var(--line); }
.pop-now { padding: 13px 14px 12px; border-bottom: 1px solid var(--line); }
.pop-title { margin-top: 5px; font: 600 1.16rem/1.2 var(--font-said); }
.pop-meta { margin-top: 3px; font-size: .8rem; color: var(--ink-3); }
.pop-checks { display: flex; flex-wrap: wrap; gap: 2px 14px; margin-top: 8px; font-size: .78rem; color: var(--ink-2); }
.pop-checks span { display: inline-flex; align-items: center; gap: 4px; }
.pop-checks .ic { width: 13px; height: 13px; stroke-width: 2.4; }
.pop-path { padding: 12px 14px 12px; display: grid; gap: 0; }
.pop-path li { position: relative; display: grid; grid-template-columns: 7.4em minmax(0, 1fr); gap: 2px 8px; padding: 6px 0 6px 22px; font-size: .82rem; color: var(--ink-3); }
.pop-path li::before { content: ""; position: absolute; left: 3px; top: 11px; width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--line-strong); background: var(--surface); z-index: 1; }
.pop-path li::after { content: ""; position: absolute; left: 7px; top: 20px; bottom: -11px; border-left: 1px dashed var(--line-strong); }
.pop-path li:last-child::after { display: none; }
.pop-path li b { color: var(--ink); font-weight: 600; }
.pop-path .is-next { grid-template-columns: minmax(0, 1fr); padding-bottom: 10px; }
.pop-path .is-next::before { border-color: var(--accent); box-shadow: inset 0 0 0 2px var(--surface); background: var(--accent); width: 11px; height: 11px; left: 2px; }
.pop-path .is-next b { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: .9rem; }
.pop-path .is-next .ui-btn { justify-self: start; margin-top: 4px; }
.pop-path .pop-pro { grid-template-columns: minmax(0, 1fr); font-size: .68rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; padding-top: 8px; padding-bottom: 2px; }
.pop-path .pop-pro::before { display: none; }

/* The folder */
.files { font-size: .86rem; line-height: 1.4; }
.files-path { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; padding: 11px 14px; border-bottom: 1px solid var(--line); font-weight: 600; }
.files-path span { color: var(--ink-3); font-weight: 400; }
.files li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas: "ic name size" "ic what size";
  gap: 1px 10px;
  align-items: center;
  padding: 11px 14px;
}
.files li + li { border-top: 1px solid var(--line); }
.files li .ic { grid-area: ic; width: 20px; height: 20px; color: var(--ink-3); stroke-width: 1.5; }
.f-name { grid-area: name; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.f-name i { font-style: normal; font-weight: 400; color: var(--ink-3); }
.f-what { grid-area: what; font-size: .8rem; color: var(--ink-3); }
.f-size { grid-area: size; font: 400 .72rem/1.4 var(--font-min); color: var(--ink-3); white-space: nowrap; }

/* The reading edition */
.paper { padding: clamp(16px, 2.4vw, 26px) clamp(16px, 2.6vw, 28px); }
.paper-kind { font-size: .74rem; color: var(--ink-3); }
.paper-h1 { margin-top: 4px; font: 600 clamp(1.2rem, 1.8vw, 1.45rem)/1.18 var(--font-said); letter-spacing: -.01em; }
.paper-meta { display: flex; flex-wrap: wrap; gap: 2px 14px; margin-top: 6px; font-size: .76rem; color: var(--ink-3); }
.paper-meta b { color: var(--ink); font-weight: 650; }
.paper-slide { display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline; margin-top: 14px; padding: 7px 10px; border-radius: 6px; background: var(--surface); border: 1px solid var(--line); font-size: .78rem; color: var(--ink-2); }
.paper-slide b { font: 600 .72rem/1.4 var(--font-min); color: var(--ink-3); }
.para { display: grid; grid-template-columns: 3.3rem minmax(0, 1fr); gap: 0 10px; margin-top: 10px; align-items: start; }
.para .cite { margin-top: .3em; justify-self: start; }
.para p { font: 400 .93rem/1.55 var(--font-said); color: var(--ink); }

/* The study page */
.sp { font-size: .78rem; line-height: 1.4; overflow: hidden; }
.sp-bar { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.sp-bar b { margin-right: auto; font-size: .86rem; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sp-bar span { color: var(--ink-3); font-size: .74rem; white-space: nowrap; }
.sp-body { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
.sp-video { padding: 12px; }
.sp-slides { border-left: 1px solid var(--line); }
.sp-text { grid-column: 1 / -1; border-top: 1px solid var(--line); }
.sp-transport { display: flex; align-items: center; gap: 10px; padding-top: 10px; }
.sp-transport .rail { position: relative; top: 0; flex: 1; }
.rail-fill-static { transform: scaleX(.306); }
.sp-slides { padding: 8px; display: grid; gap: 2px; align-content: start; }
.sp-slides li { display: grid; grid-template-columns: 1.6em minmax(0, 1fr); gap: 8px; align-items: start; padding: 5px 6px; border-radius: 6px; color: var(--ink-2); }
.sp-slides .n { font: 500 .7rem/1.6 var(--font-min); color: var(--ink-3); text-align: center; background: var(--surface); border-radius: 4px; }
.sp-slides .is-now { background: var(--surface); color: var(--ink); font-weight: 650; }
.sp-slides .is-now .n { background: var(--ink); color: var(--surface); }
.sp-text { padding: 8px; }
.sp-text p {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  padding: 8px;
  border-radius: 7px;
  font: 400 .86rem/1.5 var(--font-said);
  color: var(--ink-2);
}
.sp-text .cite { margin-top: .2em; }
.sp-text .is-now { background: var(--surface); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }

/* Before an AI run */
.sheet { padding: 16px; font-size: .82rem; line-height: 1.45; }
.sheet-title { font: 600 1.12rem/1.2 var(--font-said); }
.sheet-sub { color: var(--ink-3); font-size: .78rem; margin-top: 2px; }
.sheet dl { margin-top: 10px; }
.sheet dl div { display: grid; grid-template-columns: 4.6em minmax(0, 1fr); gap: 10px; padding: 8px 0; border-top: 1px solid var(--line); }
.sheet dt { font: 600 .66rem/1.9 var(--font-ui); letter-spacing: .07em; text-transform: uppercase; color: var(--ink-3); }
.sheet dd { color: var(--ink-2); }
.sheet dd b { color: var(--ink); font-weight: 600; }
.sheet-btns { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; margin-top: 4px; padding-top: 12px; border-top: 1px solid var(--line); }

/* A review card */
.bigcard { padding: clamp(16px, 2.4vw, 24px); }
.bigcard-src { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; font-size: .78rem; color: var(--ink-3); }
.bigcard-q { margin-top: 10px; font: 600 clamp(1.08rem, 1.7vw, 1.3rem)/1.25 var(--font-said); letter-spacing: -.008em; text-wrap: pretty; }
.bigcard-a { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); font: 400 1.08rem/1.3 var(--font-said); }
.bigcard .said p { font-size: .9rem; }
.bigcard-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-top: 14px; }
.grades { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; margin-top: 14px; }
.grades li { display: grid; gap: 1px; padding: 7px 4px; text-align: center; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.grades b { font-size: .84rem; }
.grades span { font: 400 .7rem/1.4 var(--font-min); color: var(--ink-3); }
.grades .is-picked { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }

/* ---------- See what it makes ---------- */

.lec { margin-top: clamp(36px, 4.6vw, 60px); }
.lec + .lec { padding-top: clamp(36px, 4.6vw, 60px); border-top: 1px solid var(--line); }
.lec-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 16px; }
.lec-n { width: 100%; font: 500 .8rem/1.4 var(--font-min); color: var(--ink-3); }
.lec-head h3 { font: 600 clamp(1.3rem, 2.1vw, 1.7rem)/1.2 var(--font-said); letter-spacing: -.01em; text-wrap: balance; }
.lec-meta { width: 100%; font-size: .9rem; color: var(--ink-3); }

.samples {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
  margin-top: 20px;
}
.sample {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: clamp(16px, 2vw, 22px);
  min-width: 0;
  transition: border-color .2s, box-shadow .2s;
}
.sample:hover { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.sample-read { grid-row: span 2; padding: clamp(18px, 2.4vw, 28px); box-shadow: var(--shadow-sm); }
.sample-wide { grid-column: 2 / -1; }
.sample-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 10px; }
.sample-kind { font: 700 1.05rem/1.2 var(--font-display); letter-spacing: -.01em; }
.sample-read .sample-kind { font-size: 1.3rem; }
.sample-what { font-size: .93rem; line-height: 1.5; color: var(--ink-2); text-wrap: pretty; }
.sample-ex {
  flex: 1;
  margin-top: 2px;
  padding: 12px 14px;
  border-radius: 9px;
  background: var(--tint);
  font: 400 .92rem/1.5 var(--font-said);
  color: var(--ink);
  min-width: 0;
}
.sample-ex .para:first-child { margin-top: 0; }
.sample-ex .ex-label { font: 400 .74rem/1.4 var(--font-ui); color: var(--ink-3); margin-bottom: 4px; }
.sample-ex .ex-q { font-weight: 600; font-size: 1rem; line-height: 1.35; }
.sample-ex .ex-a { margin-top: 6px; color: var(--ink-2); }
.sample-ex .ex-cites { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.sample-ex .paper-slide { margin-top: 10px; background: var(--surface); }
.sample-ex .ex-row { display: grid; grid-template-columns: 1.6em minmax(0, 1fr) auto; gap: 8px; align-items: baseline; padding: 4px 0; font: 400 .84rem/1.4 var(--font-ui); color: var(--ink-2); }
.sample-ex .ex-row + .ex-row { border-top: 1px solid var(--line); }
.sample-ex .ex-row .n { font: 500 .72rem/1.5 var(--font-min); color: var(--ink-3); }
.sample-links { display: flex; flex-wrap: wrap; gap: 6px 18px; align-items: center; margin-top: 2px; font-size: .95rem; }
.sample-links .also { font-size: .88rem; color: var(--ink-2); }
/* The whole card is the target of its main link. */
.sample-open::after { content: ""; position: absolute; inset: 0; border-radius: 14px; }
.sample-links a:not(.sample-open) { position: relative; z-index: 1; }
.gallery-note { margin-top: clamp(28px, 3.4vw, 44px); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px clamp(24px, 4vw, 56px); }

/* ---------- Only the downloader ---------- */

#downloader { padding-top: clamp(48px, 6vw, 84px); padding-bottom: clamp(48px, 6vw, 84px); }
.nones { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin-top: clamp(22px, 2.6vw, 32px); border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.nones li { display: grid; gap: 1px; padding: 14px 18px; border-left: 1px solid var(--line); }
.nones li:first-child { border-left: 0; }
.nones b { font: 700 clamp(1.15rem, 1.9vw, 1.5rem)/1.15 var(--font-display); letter-spacing: -.02em; }
.nones span { font-size: .9rem; color: var(--ink-2); }
.handles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 clamp(20px, 3vw, 44px); margin-top: clamp(18px, 2.2vw, 28px); }
.handles li { display: grid; gap: 4px; align-content: start; padding: 14px 0; border-top: 2px solid var(--ink); }
.handles h3 { font: 700 1.08rem/1.3 var(--font-display); letter-spacing: -.01em; }
.handles p { color: var(--ink-2); font-size: .96rem; line-height: 1.45; text-wrap: pretty; }
.cannot { margin-top: clamp(10px, 1.4vw, 16px); padding: 12px 16px; border-radius: 10px; border: 1px solid var(--line-strong); font-size: .98rem; color: var(--ink-2); text-wrap: pretty; }
.cannot b { color: var(--ink); }
.dl-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 28px; margin-top: clamp(18px, 2.2vw, 26px); }
.dl-foot .mn { flex: 1 1 320px; max-width: 62ch; }

/* ---------- Free and Pro ---------- */

.fp-wrap { margin-top: clamp(32px, 4vw, 52px); }
.fp { width: 100%; border-collapse: collapse; font-size: .98rem; line-height: 1.4; }
.fp th, .fp td { padding: 13px 14px; text-align: left; vertical-align: middle; }
.fp thead th { font: 700 1.05rem/1.2 var(--font-display); text-align: center; padding-bottom: 12px; }
.fp thead th:first-child { text-align: left; padding-left: 0; }
.fp thead th:nth-child(n+2), .fp td { width: 19%; text-align: center; }
.fp tbody th[scope="row"] { font-weight: 400; padding-left: 0; }
.fp tbody th[scope="row"] b { font-weight: 650; }
.fp tbody th .tag { margin-left: 8px; vertical-align: 1px; }
.fp tbody tr:not(.group):not(.line-row) > * { border-top: 1px solid var(--line); }
.fp tr.group th { padding: 26px 0 10px; font: 700 .86rem/1.2 var(--font-ui); color: var(--ink-3); }
.fp td .ic { width: 20px; height: 20px; stroke-width: 2.2; vertical-align: middle; }
.fp td .ic-none { color: var(--line-strong); }
.fp td.txt { font-size: .88rem; color: var(--ink-2); }
.fp thead th:last-child, .fp td:last-child { background: color-mix(in srgb, var(--ink) 5%, transparent); }
.fp thead th:last-child { border-radius: 10px 10px 0 0; }
.fp tbody tr:last-child td:last-child { border-radius: 0 0 10px 10px; }
.fp td:last-child.txt { color: var(--ink); font-weight: 600; }
.fp .line-row td { padding: 22px 0 0; background: none; text-align: left; width: auto; }
.fp .line-row .free-line { margin: 0; }

/* ---------- Pricing ---------- */

.plans {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 18px;
  margin-top: clamp(32px, 4vw, 52px);
}
.plan {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  border-radius: 16px;
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line);
  scroll-margin-top: 20px;
  min-width: 0;
}
.plan-free { background: var(--surface); }
.plan-pro { box-shadow: var(--shadow); }
.plan h3 { font: 700 1.12rem/1.2 var(--font-display); display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.price { display: flex; align-items: baseline; gap: 10px; margin-top: 14px; }
.amount { font: 700 clamp(2.4rem, 4.4vw, 3.5rem)/1 var(--font-display); letter-spacing: -.035em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.per { font-size: 1rem; color: var(--ink-2); }
.prices { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 22px; }
.price-or { color: var(--ink-3); font-size: 1rem; }
.plan-line { margin-top: 14px; color: var(--ink-2); max-width: 50ch; text-wrap: pretty; }
.ticks { display: grid; gap: 9px; margin: 20px 0 26px; }
.plan-pro .ticks { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px 28px; }
.ticks li { display: flex; gap: 10px; align-items: baseline; font-size: .97rem; line-height: 1.4; }
.ticks .ic { position: relative; top: .2em; color: var(--ink-3); stroke-width: 2; }
.plan .btn-row { margin-top: auto; width: 100%; }
.plan-foot { margin-top: 12px; font-size: .88rem; color: var(--ink-3); text-wrap: pretty; }
.plan-foot strong { color: var(--ink-2); }
.plan-ai { margin: 0 0 22px; padding: 12px 14px; border-radius: 10px; background: var(--ai-bg); color: var(--ai-ink); box-shadow: inset 0 0 0 1px var(--ai-line); font-size: .93rem; line-height: 1.45; text-wrap: pretty; }
.plan-ai b { font-weight: 700; }
.plan-ai a { color: inherit; font-weight: 600; }

.own-ai {
  margin-top: 18px;
  border: 1px solid var(--ai-line);
  background: color-mix(in srgb, var(--ai-bg) 45%, var(--surface));
  border-radius: 16px;
  padding: clamp(20px, 3vw, 34px);
  scroll-margin-top: 20px;
}
.own-ai h3 { font: 700 clamp(1.3rem, 2.1vw, 1.65rem)/1.2 var(--font-display); letter-spacing: -.018em; text-wrap: balance; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.own-ai-body {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  gap: 24px clamp(28px, 5vw, 72px);
  margin-top: 16px;
  align-items: start;
}
.own-ai-text { display: grid; gap: 12px; }
.own-ai-text p { color: var(--ink-2); max-width: 60ch; text-wrap: pretty; }
.own-ai-text strong { color: var(--ink); }
.cost { width: 100%; border-collapse: collapse; font-size: .95rem; }
.cost caption { text-align: left; font-weight: 650; padding-bottom: 8px; }
.cost th, .cost td { text-align: left; padding: 9px 12px 9px 0; border-top: 1px solid color-mix(in srgb, var(--ink) 16%, transparent); vertical-align: baseline; }
.cost thead th { font-size: .8rem; font-weight: 650; color: var(--ink-3); }
.cost tbody th { font-weight: 400; color: var(--ink-2); }
.cost td:last-child, .cost th:last-child { text-align: right; padding-right: 0; white-space: nowrap; }
.cost td:last-child { font: 600 .95rem/1.5 var(--font-min); font-variant-numeric: tabular-nums; }
.cost-note { margin-top: 10px; font-size: .86rem; color: var(--ink-3); text-wrap: pretty; }

.terms-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px clamp(24px, 4vw, 56px);
  margin-top: clamp(32px, 4vw, 52px);
}
.terms-row li { display: grid; gap: 6px; align-content: start; padding-top: 16px; border-top: 2px solid var(--ink); }
.terms-row h3 { font: 700 1.1rem/1.3 var(--font-display); letter-spacing: -.008em; }
.terms-row p { color: var(--ink-2); font-size: .98rem; text-wrap: pretty; }

/* ---------- FAQ ---------- */

.faq { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 28px clamp(24px, 5vw, 72px); align-items: start; }
.faq-head p { margin-top: 14px; color: var(--ink-2); max-width: 34ch; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 0;
  list-style: none;
  cursor: pointer;
  font: 650 1.08rem/1.35 var(--font-display);
  letter-spacing: -.008em;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary .ic { color: var(--ink-3); transition: transform .4s var(--ease), color .2s; }
.faq-list summary:hover .ic { color: var(--ink); }
.faq-list details[open] summary .ic { transform: rotate(45deg); }
.faq-list details > div { padding: 0 40px 22px 0; display: grid; gap: 10px; }
.faq-list details p, .faq-list details li { color: var(--ink-2); max-width: 68ch; text-wrap: pretty; }
.faq-list details ul { display: grid; gap: 6px; padding-left: 1.1em; list-style: disc; }

/* ---------- Contact ---------- */

.contact { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 28px clamp(28px, 6vw, 88px); align-items: start; }
.contact-copy { display: grid; gap: 14px; }
.mailto { font: 700 clamp(1.25rem, 2.6vw, 1.9rem)/1.2 var(--font-display); letter-spacing: -.02em; text-decoration-color: var(--accent); text-decoration-thickness: 2px; overflow-wrap: anywhere; }
.contact-copy p { color: var(--ink-2); max-width: 46ch; }
.write-for { border-top: 2px solid var(--ink); }
.write-for li { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 4px 20px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.write-for b { font: 700 1rem/1.35 var(--font-display); }
.write-for span { color: var(--ink-2); font-size: .98rem; text-wrap: pretty; }

/* ---------- Closing: get it ---------- */

.closing { padding: clamp(60px, 8vw, 110px) 0; scroll-margin-top: 0; }
.night {
  --bg: #0b0d10;
  --surface: #14181d;
  --tint: #1c2128;
  --ink: #f1f3f5;
  --ink-2: #b9bfc9;
  --ink-3: #969da8;
  --line: #262b33;
  --line-strong: #3a414b;
  --accent: #ff6a1f;
  --accent-ink: #ff8f55;
  background: var(--bg);
  color: var(--ink);
}
.closing-row { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: 28px clamp(28px, 6vw, 88px); align-items: start; }
.closing h2 { font-size: clamp(2.1rem, 4.6vw, 3.8rem); line-height: 1.02; letter-spacing: -.032em; }
.closing-act { display: grid; gap: 18px; }
.closing-act > p { color: var(--ink-2); max-width: 50ch; text-wrap: pretty; }
.first-steps { counter-reset: step; display: grid; gap: 0; border-top: 1px solid var(--line); }
.first-steps li { counter-increment: step; display: grid; grid-template-columns: 2em minmax(0, 1fr); gap: 0 8px; padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--ink-2); font-size: .98rem; }
.first-steps li::before { content: counter(step); font: 500 .84rem/1.9 var(--font-min); color: var(--ink-3); }
.first-steps b { color: var(--ink); }

/* ---------- Footer ---------- */

.site-foot { padding: clamp(36px, 5vw, 56px) 0 44px; border-top: 1px solid var(--line); }
.foot-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); gap: 28px clamp(20px, 4vw, 56px); }
.foot-about p { margin-top: 12px; font-size: .9rem; line-height: 1.55; color: var(--ink-3); max-width: 40ch; }
.foot-col h2 { font: 650 .86rem/1.4 var(--font-ui); color: var(--ink-3); letter-spacing: 0; }
.foot-col ul { margin-top: 10px; display: grid; gap: 2px; }
.foot-col a { display: inline-block; padding: 4px 0; font-size: .95rem; color: var(--ink-2); text-decoration: none; }
.foot-col a:hover { color: var(--ink); text-decoration: underline; }
.foot-notes { display: grid; gap: 8px; margin-top: 32px; padding-top: 22px; border-top: 1px solid var(--line); }
.foot-notes p { font-size: .84rem; line-height: 1.55; color: var(--ink-3); max-width: 100ch; }

/* ---------- Document pages: guides, comparison, privacy, terms ---------- */

.doc-head { padding: clamp(20px, 3vw, 40px) 0 clamp(28px, 4vw, 48px); border-bottom: 1px solid var(--line); }
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; font-size: .88rem; color: var(--ink-3); margin-bottom: 16px; }
.crumbs a { color: var(--ink-2); }
.doc-head h1 { font: 700 clamp(2rem, 4.2vw, 3.3rem)/1.05 var(--font-display); letter-spacing: -.03em; text-wrap: balance; max-width: 22ch; }
.doc-head .lede { margin-top: 16px; font-size: 1.15rem; line-height: 1.5; color: var(--ink-2); max-width: 62ch; text-wrap: pretty; }
.doc-head .tags { margin-top: 16px; }
.doc-date { margin-top: 14px; font-size: .88rem; color: var(--ink-3); }

.doc-grid { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 40px clamp(32px, 6vw, 88px); align-items: start; padding: clamp(32px, 4.4vw, 56px) 0 clamp(56px, 7vw, 96px); }
.doc-grid-wide { grid-template-columns: minmax(0, 1fr); }
.prose { min-width: 0; max-width: 72ch; }
.doc-grid-wide .prose { max-width: none; }
.prose > * + *, .prose .narrow > * + * { margin-top: 1rem; }
.prose .narrow + .cmp, .prose .cmp + .narrow { margin-top: 0; }
.prose .narrow > h2:first-child { margin-top: 2.6rem; }
.prose > .narrow:first-child > h2:first-child { margin-top: 0; }
.prose h2 { font: 700 clamp(1.4rem, 2.3vw, 1.8rem)/1.15 var(--font-display); letter-spacing: -.02em; margin-top: 2.6rem; text-wrap: balance; scroll-margin-top: 20px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font: 700 1.14rem/1.3 var(--font-display); letter-spacing: -.01em; margin-top: 1.8rem; }
.prose p, .prose li { color: var(--ink-2); text-wrap: pretty; }
.prose strong { color: var(--ink); }
.prose a { color: var(--ink); text-decoration-color: var(--line-strong); }
.prose a:hover { text-decoration-color: currentColor; }
.prose ul.facts { display: grid; gap: 8px; padding-left: 1.15em; list-style: disc; }
.prose ul.facts li::marker { color: var(--line-strong); }
.prose .narrow { max-width: 72ch; }

.how { counter-reset: how; display: grid; gap: 0; border-top: 1px solid var(--line); }
.how > li { counter-increment: how; display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); gap: 0 6px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.how > li::before { content: counter(how); display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--ink); color: var(--bg); font: 700 .8rem/1 var(--font-ui); margin-top: 1px; }
.how h3 { margin: 0; font-size: 1.08rem; }
.how p { margin-top: 4px; }
.how .tags { margin-top: 8px; }

.prose .faq-list { margin-top: 1rem; }
.prose .faq-list summary { font-size: 1.04rem; padding: 14px 0; }
.prose .faq-list summary::after { content: "+"; font: 400 1.3rem/1 var(--font-ui); color: var(--ink-3); }
.prose .faq-list details[open] summary::after { content: "\2212"; }
.prose .faq-list details > div { padding: 0 0 16px; }

.callout { margin-top: 2.2rem; padding: clamp(16px, 2.4vw, 24px); border-radius: 14px; background: var(--surface); border: 1px solid var(--line); }
.callout h2, .callout h3 { margin: 0 0 6px; font: 700 1.14rem/1.3 var(--font-display); }
.callout-ai { background: color-mix(in srgb, var(--ai-bg) 45%, var(--surface)); border-color: var(--ai-line); }
.callout p + p { margin-top: 8px; }

.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.pair > div { padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); font: 400 .95rem/1.45 var(--font-said); color: var(--ink); }
.pair span { display: block; font: 650 .74rem/1.5 var(--font-ui); color: var(--ink-3); margin-bottom: 2px; }
.pair small { display: block; margin-top: 6px; font: 400 .84rem/1.45 var(--font-ui); color: var(--ink-2); }
.pair .better { border-color: var(--free-ink); }
.pair .better span { color: var(--free-ink); }

.doc-side { position: sticky; top: 20px; display: grid; gap: 22px; }
.toc h2, .side-cta h2 { font: 650 .86rem/1.4 var(--font-ui); color: var(--ink-3); }
.toc ol { margin-top: 8px; display: grid; gap: 0; border-left: 1px solid var(--line); }
.toc a { display: block; padding: 5px 0 5px 14px; margin-left: -1px; border-left: 1px solid transparent; font-size: .93rem; color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--ink); border-left-color: var(--ink); }
.side-cta { padding: 16px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); display: grid; gap: 10px; }
.side-cta p { font-size: .9rem; color: var(--ink-2); }
.side-cta .btn { width: 100%; }

.more-guides { padding-bottom: clamp(56px, 7vw, 96px); }
.more-guides h2 { font: 700 1.3rem/1.2 var(--font-display); letter-spacing: -.015em; }
.guide-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 16px; }
.guide-cards a { display: grid; gap: 6px; height: 100%; padding: 18px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; transition: border-color .2s, box-shadow .2s; }
.guide-cards a:hover { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.guide-cards .tagline { font-size: .78rem; font-weight: 650; color: var(--ink-3); }
.guide-cards b { font: 700 1.08rem/1.3 var(--font-display); letter-spacing: -.01em; }
.guide-cards span:last-child { font-size: .92rem; color: var(--ink-2); }

/* The comparison table */
.cmp { width: 100%; border-collapse: collapse; font-size: .97rem; line-height: 1.45; margin-top: 1.4rem; }
.cmp caption { text-align: left; font-size: .88rem; color: var(--ink-3); padding-bottom: 12px; caption-side: top; }
.cmp th, .cmp td { text-align: left; vertical-align: top; padding: 14px 18px 14px 0; border-top: 1px solid var(--line); }
.cmp thead th { font: 700 1rem/1.3 var(--font-display); border-top: 0; border-bottom: 2px solid var(--ink); vertical-align: bottom; }
.cmp tbody th { font-weight: 650; color: var(--ink); width: 22%; }
.cmp td { color: var(--ink-2); width: 39%; }
.cmp td b { color: var(--ink); }
.cmp .src { display: block; margin-top: 4px; font-size: .82rem; color: var(--ink-3); }
.cmp tr.group th { padding-top: 30px; border-top: 0; font: 700 .86rem/1.2 var(--font-ui); color: var(--ink-3); width: auto; }
.sources { display: grid; gap: 8px; padding-left: 1.3em; list-style: decimal; }
.sources li { color: var(--ink-2); font-size: .93rem; overflow-wrap: anywhere; }

/* ---------- Responsive ---------- */

@media (max-width: 1099px) {
  .path { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .path li:nth-child(4)::before { display: none; }
  .samples { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sample-read { grid-row: auto; grid-column: 1 / -1; }
  .sample-wide { grid-column: 1 / -1; }
  .foot-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .foot-about { grid-column: 1 / -1; }
}

@media (max-width: 899px) {
  .site-nav { display: none; }
  .head-row { justify-content: space-between; }
  .head-row .theme-btn { margin-left: auto; }
  .hero-sub,
  .section-head,
  .dl-grid,
  .plans,
  .own-ai-body,
  .faq,
  .contact,
  .closing-row { grid-template-columns: minmax(0, 1fr); }
  .scene .made-ask { display: none; }
  .after-evening { grid-template-columns: minmax(0, 1fr); }
  .terms-row { grid-template-columns: minmax(0, 1fr); }
  .doc-grid { grid-template-columns: minmax(0, 1fr); }
  .doc-side { position: static; order: -1; }
  .doc-side .side-cta { display: none; }
  .guide-cards { grid-template-columns: minmax(0, 1fr); }
  .gallery-note { grid-template-columns: minmax(0, 1fr); }
}
@media (min-width: 900px) {
  .head-row .btn { margin-left: 4px; }
}

@media (max-width: 719px) {
  body { font-size: 1rem; }
  /* On a phone the browser window stays whole: the lecture, then the popup under it. */
  .br-body { grid-template-columns: minmax(0, 1fr); }
  .xpop { height: 456px; }
  .path { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .path li:nth-child(4)::before { display: block; }
  .path li:nth-child(odd)::before { display: none; }
  .path .path-line::before { display: none; }
  .samples { grid-template-columns: minmax(0, 1fr); }
  .sp-body { grid-template-columns: minmax(0, 1fr); }
  .sp-slides { border-left: 0; border-top: 1px solid var(--line); }
  .handles div, .write-for li { grid-template-columns: minmax(0, 1fr); }
  .plan-pro .ticks { grid-template-columns: minmax(0, 1fr); }
  .fp { font-size: .92rem; }
  .fp th, .fp td { padding: 12px 6px; }
  .fp thead th:nth-child(n+2), .fp td { width: 23%; }
  .fp td.txt { font-size: .78rem; }
  .fp tbody th .tag { margin: 4px 0 0; display: flex; width: max-content; }
  .faq-list details > div { padding-right: 0; }
  .btn-row .btn { flex: 1 1 auto; }
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pair { grid-template-columns: minmax(0, 1fr); }
  .free-line { font-size: .92rem; }

  /* The comparison table becomes one block per row. */
  .cmp thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .cmp, .cmp tbody, .cmp tr, .cmp th, .cmp td { display: block; width: auto; }
  .cmp tbody tr { padding: 14px 0; border-top: 1px solid var(--line); }
  .cmp tbody tr.group { padding: 22px 0 0; border-top: 0; }
  .cmp th, .cmp td, .cmp tbody th { border: 0; padding: 0; width: auto; }
  .cmp caption { display: block; }
  .cmp td { margin-top: 8px; }
  .cmp td::before { content: attr(data-label); display: block; font-size: .78rem; font-weight: 650; color: var(--ink-3); }
}

@media (max-width: 480px) {
  .head-row { gap: 8px; }
  .head-row .btn { padding: 0 .8em; }
  .para { grid-template-columns: minmax(0, 1fr); }
  .para .cite { margin: 0 0 4px; }
  .nones { grid-template-columns: minmax(0, 1fr); }
  .pop-path li { grid-template-columns: minmax(0, 1fr); }
  .foot-grid { grid-template-columns: minmax(0, 1fr); }
  .amount { font-size: 2.3rem; }
  .sheet dl div { grid-template-columns: minmax(0, 1fr); gap: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation: none !important; }
}

@media print {
  .site-nav, .btn, .theme-btn, .skip { display: none !important; }
  .night, .inverse { --bg: #fff; --surface: #fff; --ink: #000; --ink-2: #222; --ink-3: #444; --line: #bbb; --line-strong: #888; background: #fff; color: #000; }
  body { background: #fff; }
}

/* ---------- Responsive: the opening, "Read the lecture" and the downloader ---------- */

@media (max-width: 1199px) {
  .more-grid { grid-template-columns: minmax(0, 1fr); }
  .more-top { min-height: 0; }
}
@media (max-width: 1079px) {
  .site-nav { display: none; }
  .head-row { justify-content: space-between; }
  .head-row .theme-btn { margin-left: auto; }
}
@media (max-width: 899px) {
  .read-grid, .honest { grid-template-columns: minmax(0, 1fr); }
  .more-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .handles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nones { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nones li:nth-child(3) { border-left: 0; }
  .nones li:nth-child(n+3) { border-top: 1px solid var(--line); }
}
@media (max-width: 719px) {
  .more-cards, .uses { grid-template-columns: minmax(0, 1fr); }
  .handles { gap: 0 16px; }
  .handles p { font-size: .9rem; }
}
@media (max-width: 480px) {
  .steps3 button { font-size: .9rem; padding-right: 7px; }
  .steps3 li + li::before { width: 8px; }
  .nones li { padding: 10px 12px; }
  .nones b { font-size: 1.08rem; }
  .sheet-of-paper .para { grid-template-columns: minmax(0, 1fr); }
  .sheet-of-paper .para a.cite { margin: 0 0 4px; }
}

/* ---- Content pass, 2026-11-11: the demo as the real popup, three prices, new sections ---- */

/* The demo's popup: what the real one shows that the first copy did not. */
.xp-site { font: 400 .7rem/1.3 var(--font-min); color: var(--p-ink3); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.xp-view > * { flex: none; }
.xp-pathline { display: flex; align-items: center; gap: 10px; margin: 0 12px; padding: 10px 0; border-top: 1px solid var(--p-line); font-size: .74rem; line-height: 1.4; color: var(--p-ink2); }
.xp-pathline span { flex: 1; min-width: 0; }
.xp-pathline b { color: var(--p-ink); font-weight: 600; text-decoration: underline; text-decoration-color: var(--p-line2); text-underline-offset: .2em; }
.xp-pathline .ic { width: 14px; height: 14px; flex: none; color: var(--p-ink3); }
.xp-card { display: grid; gap: 6px; margin: 2px 12px 10px; padding: 11px 12px 12px; border: 1px solid var(--p-line); border-radius: 10px; background: var(--p-surface); box-shadow: 0 3px 10px -6px rgba(14, 17, 22, .28); }
.xp-card-h { font-size: .84rem; font-weight: 600; }
.xp-card-p { font-size: .76rem; line-height: 1.4; color: var(--p-ink2); }
.xp-card .xp-btn { margin-top: 3px; }
.xp-line { display: flex; align-items: center; gap: 8px; min-height: 40px; padding: 3px 12px; font-size: .78rem; color: var(--p-ink2); }
.xp-line > span { flex: 1; min-width: 0; }
.xp-line b { color: var(--p-ink); font-weight: 600; }
.xp-made { padding: 0 12px 9px 35px; font-size: .72rem; color: var(--p-ink3); }
.xp-step > .xp-busy-plain { min-height: 5px; margin-top: 0; padding: 0; border: 0; border-radius: 3px; background: var(--p-sunken); }
.xp-busy-plain .xp-fill { height: 100%; }
.xp-row-main b .rv-count { margin-left: 4px; font: 500 .66rem/1.7 var(--font-min); color: var(--p-ink2); }

/* The course page in the demo: eight videos, so the popup shows its strip. */
.course-list { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px 7px; }
.course-list li { font-size: .72rem; }
.xp-course .xp-hero { padding-bottom: 11px; }
.xp-strip { padding: 10px 12px 10px; border-top: 1px solid var(--p-line); border-bottom: 1px solid var(--p-line); background: var(--p-surface); }
.xp-strip-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; font-size: .76rem; }
.xp-strip-head b { font-weight: 600; }
.xp-strip-head span { font: 500 .62rem/1.3 var(--font-min); letter-spacing: .09em; text-transform: uppercase; color: var(--p-ink3); white-space: nowrap; }
.xp-cells { display: grid; grid-template-columns: repeat(20, 1fr); gap: 3px; margin-top: 8px; }
.xp-cells i, .xp-legend i { height: 11px; border-radius: 2px; border: 1.25px solid var(--p-line2); background: transparent; }
.xp-cells i.c-saved, .xp-legend i.c-saved { background: var(--p-ink); border-color: var(--p-ink); }
.xp-cells i.c-check, .xp-legend i.c-check { border-style: dotted; }
.xp-cells i.c-busy, .xp-legend i.c-busy { border-color: var(--p-mark); background: linear-gradient(to top, var(--p-mark) 50%, transparent 50%); }
.xp-cells i.here { background: var(--p-mark); border-color: var(--p-mark); border-style: solid; }
.xp-cells i.here.c-saved { background: var(--p-ink); border-color: var(--p-ink); outline: 1.5px solid var(--p-mark); outline-offset: 1px; }
.xp-legend { display: flex; flex-wrap: wrap; gap: 3px 12px; margin-top: 7px; font-size: .7rem; color: var(--p-ink2); }
.xp-legend li { display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; }
.xp-legend i { width: 9px; height: 9px; flex: none; }
.xp-bulk { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; margin-top: 9px; }
.xp-bulk .xp-chip { display: inline-flex; align-items: center; gap: 6px; }
.xp-bulk .ic { width: 14px; height: 14px; }
.xp-bulk .xp-note { flex-basis: 100%; min-height: 0; }
.xp-course .xp-list { margin: 0; padding: 2px 12px 8px; }
.xp-list em { grid-column: 1 / -1; justify-self: start; font-style: normal; font-size: .66rem; border-style: dotted; }
.xp-list small { grid-column: 1 / -1; font-size: .68rem; line-height: 1.35; color: var(--p-ink3); }
.rv-why { grid-column: 2 / -1; font-size: .68rem; line-height: 1.35; color: var(--p-ink3); }
.rv-have { font-size: .7rem; color: var(--p-ink3); }
.rv-total { margin-right: auto; align-self: center; font-size: .68rem; color: var(--p-ink3); }
.rv-meta .rv-tag { margin-right: 4px; }

/* The two things Pro does differently, said as headlines. */
.claims { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(22px, 3vw, 44px); margin-top: clamp(24px, 3vw, 40px); }
.claims > li { display: grid; gap: .7rem; align-content: start; padding-top: 18px; border-top: 2px solid var(--ink); }
.claims h3 { font: 700 clamp(1.45rem, 1.3vw + 1.05rem, 2rem)/1.12 var(--font-display); letter-spacing: -.024em; text-wrap: balance; }
.claims p { color: var(--ink-2); max-width: 62ch; text-wrap: pretty; }
.claims p strong, .claims p b { color: var(--ink); }
.claims .facts-in { display: grid; gap: 6px; margin: 2px 0 0; }
.claims .facts-in li { position: relative; padding-left: 16px; color: var(--ink-2); font-size: .98rem; text-wrap: pretty; }
.claims .facts-in li::before { content: ""; position: absolute; left: 0; top: .62em; width: 7px; height: 2px; background: var(--ink-3); }
.claims .facts-in b { color: var(--ink); font-weight: 650; }

/* Three ways to pay, the yearly one first, and what the AI costs in the same list and the same size. */
.price-list { display: grid; gap: 8px; margin-top: 14px; width: 100%; }
.price-list li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 10px; padding: 10px 14px 11px; border-radius: 12px; box-shadow: inset 0 0 0 1px var(--line-strong); }
.price-list li.is-first { box-shadow: inset 0 0 0 2px var(--ink); }
.price-list .amount { font-size: clamp(1.75rem, 2.8vw, 2.3rem); }
.price-list .per { font-size: 1rem; }
.price-what { margin-left: auto; font-size: .95rem; color: var(--ink-2); text-align: right; }
.price-list li.price-ai { display: grid; gap: 8px; background: var(--ai-bg); color: var(--ai-ink); box-shadow: inset 0 0 0 1px var(--ai-line); }
.price-ai-h { font-size: .95rem; font-weight: 700; }
.price-ai-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 10px; }
.price-list li.price-ai .amount { white-space: normal; }
.price-list li.price-ai .per { color: inherit; flex: 1 1 100%; text-wrap: pretty; }
.plan-pro .btn-row { margin-top: 4px; }
.plan-ai { margin-top: 0; }

/* More than lectures, and the comparison with online study-note tools. */
.more-than { margin-top: clamp(44px, 5.5vw, 76px); scroll-margin-top: 20px; }
.kinds { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0 clamp(18px, 2.6vw, 36px); margin-top: clamp(20px, 2.4vw, 32px); }
.kinds li { display: grid; gap: 4px; align-content: start; padding: 14px 0; border-top: 2px solid var(--ink); }
.kinds h3 { font: 700 1.08rem/1.3 var(--font-display); letter-spacing: -.01em; }
.kinds p { color: var(--ink-2); font-size: .96rem; line-height: 1.45; text-wrap: pretty; }
.kinds-note { margin-top: clamp(10px, 1.4vw, 16px); }
.two-ways { width: 100%; border-collapse: collapse; margin-top: 1.2rem; font-size: .97rem; line-height: 1.45; }
.two-ways th, .two-ways td { text-align: left; vertical-align: top; padding: 12px 18px 12px 0; border-top: 1px solid var(--line); }
.two-ways thead th { font: 700 1rem/1.3 var(--font-display); border-top: 0; border-bottom: 2px solid var(--ink); }
.two-ways tbody th { font-weight: 650; width: 22%; }
.two-ways td { color: var(--ink-2); width: 39%; }
.two-ways td b { color: var(--ink); }

@media (max-width: 899px) {
  .claims { grid-template-columns: minmax(0, 1fr); }
  .kinds { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 719px) {
  .price-what { margin-left: 0; flex: 1 1 100%; text-align: left; }
  .two-ways thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .two-ways, .two-ways tbody, .two-ways tr, .two-ways th, .two-ways td { display: block; width: auto; }
  .two-ways tbody tr { padding: 12px 0; border-top: 1px solid var(--line); }
  .two-ways th, .two-ways td, .two-ways tbody th { border: 0; padding: 0; width: auto; }
  .two-ways td { margin-top: 8px; }
  .two-ways td::before { content: attr(data-label); display: block; font-size: .78rem; font-weight: 650; color: var(--ink-3); }
}
@media (max-width: 480px) {
  .kinds { grid-template-columns: minmax(0, 1fr); }
}

/* Before launch: one plain line at the top of every page. Remove with the note in _shell.html when 1.6 is out. */
.prelaunch { margin: 0; padding: 10px 16px; text-align: center; font-size: 0.875rem; line-height: 1.45; background: #fbf4e1; color: #5a430c; border-bottom: 1px solid #dcc48a; }
.prelaunch a { color: inherit; }
:root[data-theme="dark"] .prelaunch { background: #262112; color: #e6cf8f; border-color: #5e4f26; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .prelaunch { background: #262112; color: #e6cf8f; border-color: #5e4f26; } }
.legal .prelaunch, article .prelaunch { text-align: left; border: 1px solid #dcc48a; border-radius: 8px; margin: 12px 0; }
a[aria-disabled="true"] { cursor: default; opacity: .85; }

/* ==== Pass 3 (2026-11-11): the short home page and the pages its depth moved to. Kept in pass3.css beside the site tooling. ==== */

/* The menu: on a phone or tablet the header's links fold into one button, so the header stays one row. */
.menu { display: none; }
@media (max-width: 1079px) {
  .menu { display: block; flex: none; }
  .menu > summary {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 .85em;
    border: 1px solid var(--line-strong);
    border-radius: 9px;
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: border-color .2s, background-color .2s;
  }
  .menu > summary::-webkit-details-marker { display: none; }
  .menu > summary:hover { border-color: var(--ink); background: color-mix(in srgb, var(--ink) 6%, transparent); }
  .menu[open] > summary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
  .menu-list {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: grid;
    padding: 0 var(--gutter) 10px;
    background: var(--bg);
    border-bottom: 1px solid var(--line-strong);
    box-shadow: 0 22px 30px -22px rgba(0, 0, 0, .45);
  }
  .menu-list a {
    display: flex;
    align-items: center;
    min-height: 46px;
    border-top: 1px solid var(--line);
    font-weight: 600;
    text-decoration: none;
  }
  .menu-list a[aria-current="page"] { color: var(--accent-ink); }
  .head-row .btn { white-space: nowrap; }
  /* On a phone the light and dark switch moves into the menu, so the row has room for the three things that matter. */
  .menu-theme { display: none; }
}
@media (max-width: 480px) {
  .head-row { gap: 8px; }
  .head-row .theme-btn, .js .head-row .theme-btn { display: none; }
  .head-row .btn { margin-left: auto; }
  .head-row .btn, .menu > summary { padding: 0 .7em; font-size: .86rem; }
  .brand { gap: 8px; font-size: 1rem; }
  .js .menu-theme {
    display: flex;
    align-items: center;
    min-height: 46px;
    padding: 0;
    border: 0;
    border-top: 1px solid var(--line);
    background: none;
    color: var(--ink-2);
    font: inherit;
    text-align: left;
    cursor: pointer;
  }
}
@media (min-width: 1080px) { .menu-theme { display: none; } }
/* The narrowest phones: the mark alone stands for the name, which stays there for a screen reader. */
@media (max-width: 349px) {
  .brand span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
}
@media print { .menu { display: none !important; } }

/* The home page: the line under the buttons, and the row of what it does. */
.hero-facts a { color: var(--ink-2); font-weight: 600; }
.feats { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin-top: clamp(20px, 2.4vw, 30px); }
.feats a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-content: start;
  gap: 8px;
  height: 100%;
  padding: 12px 14px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  text-decoration: none;
  transition: border-color .2s, box-shadow .2s;
}
.feats a:hover { border-color: var(--line-strong); box-shadow: var(--shadow-sm); }
.feats .tag { grid-column: 1 / -1; justify-self: start; }
.feats b { font: 650 1rem/1.3 var(--font-display); letter-spacing: -.008em; text-wrap: balance; }
.feats .ic { margin-top: .2em; color: var(--ink-3); transition: transform .35s var(--ease); }
.feats a:hover .ic { transform: translateX(3px); color: var(--ink); }
@media (max-width: 1079px) { .feats { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 719px) {
  .feats { grid-template-columns: minmax(0, 1fr); gap: 0; border-top: 1px solid var(--line); }
  .feats a {
    grid-template-columns: 3.1rem minmax(0, 1fr) auto;
    align-items: center;
    align-content: center;
    gap: 10px;
    min-height: 50px;
    padding: 9px 2px;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: none;
  }
  .feats a:hover { box-shadow: none; }
  .feats .tag { grid-column: auto; justify-content: center; }
  .feats .ic { margin-top: 0; }
}

/* The note about the demonstration, folded under one line. */
.demo-about { margin-top: 4px; }
.demo-about > summary {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--ink-2);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  cursor: pointer;
  list-style: none;
}
.demo-about > summary::-webkit-details-marker { display: none; }
.demo-about > summary:hover { text-decoration-color: currentColor; }
.demo-about > p { margin-top: 4px; }

/* One "more" link under a short section. */
.more { font-size: .98rem; color: var(--ink-2); text-wrap: pretty; }
.more .link-arrow { display: inline; color: var(--ink); }
.more .link-arrow .ic { display: inline-block; vertical-align: -.16em; margin-left: .15em; }
.more-section { margin-top: clamp(22px, 3vw, 36px); }
.claims .more { max-width: none; }

/* On a phone the demonstration stops at its three steps. The cards after them ("And then, if you want more")
   show the study page, the guide, the quiz and a flashcard, which the samples further down the page open in full. */
@media (max-width: 719px) { .scene .more-row { display: none; } }

/* The samples on the home page: four cards, no excerpts. */
.samples-brief { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.samples-brief .sample-links { margin-top: auto; padding-top: 4px; }
@media (max-width: 1099px) { .samples-brief { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 719px) { .samples-brief { grid-template-columns: minmax(0, 1fr); } }

/* The Free card's links to the downloader's own page. */
.plan-more a { color: var(--ink-2); }
.plan-more#downloader { padding: 0; } /* (#downloader is also the section on the downloader's page, which has its own padding) */
.doc-head + #downloader { padding-top: clamp(28px, 4vw, 52px); }
.faq-head p a { color: var(--ink); }

/* Pages made from sections that used to be on the home page. */
.doc-head + .section { padding-top: clamp(28px, 4vw, 52px); }
.doc-head .page-jumps { margin-top: 14px; font-size: .93rem; color: var(--ink-3); max-width: 70ch; }
.doc-head .page-jumps a { color: var(--ink-2); }
.section > .wrap > .path:first-child, .section > .wrap > .nones:first-child, .section > .wrap > .own-ai:first-child, .section > .wrap > .terms-row:first-child { margin-top: 0; }
.section .after-install { margin-top: clamp(28px, 3.4vw, 44px); max-width: 70ch; }
.section .after-install h2 { font-size: clamp(1.3rem, 2.1vw, 1.65rem); letter-spacing: -.018em; margin-bottom: 12px; }
.page-next { padding: clamp(36px, 5vw, 64px) 0; border-top: 1px solid var(--line); }
.page-next .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 28px; }
.page-next p { flex: 1 1 280px; max-width: 56ch; color: var(--ink-2); text-wrap: pretty; }
.faq-all { max-width: 860px; }
.terms-four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 899px) { .terms-four { grid-template-columns: minmax(0, 1fr); } }
.ai-more { padding: clamp(36px, 5vw, 64px) 0 clamp(48px, 6vw, 84px); }
.ai-more .prose { max-width: 72ch; }

/* ==== Pass 4 (2026-11-11): the calm home page. Kept in pass4.css beside the site tooling. ==== */
/* The rules of this page: a few large things, one idea to a screen. Nothing boxed that does not have to be;
   two sizes of running text (--t and --t-s); wide gaps between sections; sections that are not all built the
   same way. The orange is used three times, each on purpose: the button that gets the product, the band for
   the feature the page makes the most of (the lecture as a document), and, as everywhere on this site, a
   minute in the lecture. The pictures are the product's own pages. */
:root {
  --t: clamp(1.0625rem, .98rem + .35vw, 1.1875rem);
  --t-s: .9375rem;
  --paper: #fffdf8;
  --go: #e8590c;
  --go-over: #f26a1f;
  --on-go: #0e1116;
  --field: #e8590c;
  --on-field: #0e1116;
  --night: #0e1116;
  --night-ink: #c5cad3;
  --night-line: #3a414c;
  --night-accent: #ff8f55;
  --slide: #f3f4f6;
  --slide-ink: #0e1116;
  --sheet: #f7f5ef;
  --pop-shade: rgba(0, 0, 0, .5);
  --shadow-sheet: 0 1px 2px rgba(14, 17, 22, .1), 0 28px 60px -20px rgba(14, 17, 22, .42);
  --shadow-lift: 0 2px 3px rgba(14, 17, 22, .1), 0 34px 70px -26px rgba(14, 17, 22, .5);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --paper: #1b1f25; --go: #ff6a1f; --go-over: #ff7f3d; --night: #07090c; --shadow-sheet: 0 1px 2px rgba(0, 0, 0, .3), 0 28px 60px -20px rgba(0, 0, 0, .7); --shadow-lift: 0 2px 3px rgba(0, 0, 0, .3), 0 34px 70px -26px rgba(0, 0, 0, .8); }
}
:root[data-theme="dark"] { --paper: #1b1f25; --go: #ff6a1f; --go-over: #ff7f3d; --night: #07090c; --shadow-sheet: 0 1px 2px rgba(0, 0, 0, .3), 0 28px 60px -20px rgba(0, 0, 0, .7); --shadow-lift: 0 2px 3px rgba(0, 0, 0, .3), 0 34px 70px -26px rgba(0, 0, 0, .8); }

html, body { overflow-x: clip; }

/* ---------- Every page: a quieter header and a slim launching-soon line ---------- */
.theme-btn { border-color: transparent; }
main > .prelaunch { padding: 7px 16px; font-size: .8125rem; line-height: 1.4; border-bottom: 0; }
.pl-narrow { display: none; }
@media (max-width: 599px) {
  .pl-wide { display: none; }
  .pl-narrow { display: inline; }
}

/* ---------- First screen ---------- */
.top { padding: clamp(44px, 7.5vw, 104px) 0 clamp(40px, 6vw, 76px); text-align: center; }
.top h1 {
  max-width: 13em;
  min-width: 0;
  margin-inline: auto;
  font: 700 clamp(2.35rem, 6.1vw, 4.6rem)/1.04 var(--font-display);
  letter-spacing: -.035em;
  text-wrap: balance;
  overflow-wrap: break-word;
}
@media (min-width: 760px) {
  .top h1 { max-width: none; }
  .h1-line { display: block; }
}
.top-say {
  max-width: 33em;
  margin: clamp(18px, 2.2vw, 28px) auto 0;
  font-size: var(--t);
  line-height: 1.5;
  color: var(--ink-2);
  text-wrap: balance;
}
.top-act { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 6px 30px; margin-top: clamp(26px, 3vw, 38px); }
.btn-lg { min-height: 56px; padding: 0 1.6em; border-radius: 14px; font-size: 1.0625rem; }
.btn-go { background: var(--go); color: var(--on-go); font-weight: 650; }
.btn-go:hover { background: var(--go-over); }
.btn-go:hover .ic-down { transform: translateY(2px); }
.btn-go:active { transform: translateY(1px); }
.plain-link { display: inline-flex; align-items: center; min-height: 44px; font-size: var(--t); font-weight: 600; text-decoration: underline; text-decoration-color: var(--line-strong); }
.plain-link:hover { text-decoration-color: currentColor; }
.top-price { margin-top: 16px; font-size: var(--t-s); font-variant-numeric: tabular-nums; color: var(--ink-3); }

/* The picture of the first screen: a recording becomes a document. */
.pic { max-width: 1120px; margin: clamp(44px, 6vw, 84px) auto 0; }
.pic-stage {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 7fr);
  align-items: center;
  padding: clamp(18px, 5vw, 64px);
  border-radius: clamp(18px, 2.6vw, 34px);
  background: var(--bg-2);
  text-align: left;
}
.pic-video { padding: clamp(10px, 1.2vw, 16px); border-radius: 16px; background: var(--night); box-shadow: var(--shadow-sheet); }
.pic-slide {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  aspect-ratio: 16 / 10;
  padding: 7% 7% 6%;
  border-radius: 8px;
  background: var(--slide);
  color: var(--slide-ink);
}
.pic-slide-h { max-width: 11em; font: 700 clamp(1.05rem, 1.75vw, 1.4rem)/1.2 var(--font-display); letter-spacing: -.015em; text-wrap: balance; }
.pic-graph { justify-self: end; align-self: end; width: 64%; aspect-ratio: 200 / 120; height: auto; }
.pic-bar { display: flex; align-items: center; gap: 12px; margin-top: clamp(10px, 1.2vw, 16px); padding: 0 26px 2px 4px; color: var(--night-ink); }
.pic-rail { flex: 1; height: 4px; border-radius: 2px; background: var(--night-line); }
.pic-rail i { display: block; width: 32.5%; height: 100%; border-radius: inherit; background: var(--go); }
.pic-time { font: 500 .8rem/1 var(--font-min); font-variant-numeric: tabular-nums; color: var(--night-accent); }
.pic-doc {
  position: relative;
  z-index: 1;
  max-height: clamp(380px, 35vw, 450px);
  margin-left: -14px;
  overflow: hidden;
  padding: clamp(22px, 3.4vw, 46px) clamp(20px, 3.4vw, 46px) 0;
  border-radius: 10px;
  background: var(--paper);
  box-shadow: var(--shadow-sheet);
}
.pic-doc::after { content: ""; position: absolute; inset: auto 0 0; height: 96px; background: linear-gradient(to bottom, transparent, var(--paper)); pointer-events: none; }
.pic-kind { font-size: .8125rem; font-weight: 650; color: var(--ink-3); }
.pic-title { margin-top: 6px; font: 700 clamp(1.35rem, 2.2vw, 1.8rem)/1.18 var(--font-said); letter-spacing: -.012em; text-wrap: balance; }
.pic-meta { display: flex; gap: 18px; margin-top: 8px; font-size: .875rem; color: var(--ink-3); }
.pic-para { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; align-items: start; margin-top: clamp(16px, 1.8vw, 22px); }
.pic-para .cite { margin-top: .32em; }
.pic-para p { font: 400 clamp(1rem, 1.25vw, 1.0938rem)/1.6 var(--font-said); }
.pic figcaption { margin-top: 16px; font-size: var(--t-s); color: var(--ink-3); text-align: center; }
.pic figcaption a { display: inline-block; padding: 10px 0; margin-left: .35em; color: var(--ink); font-weight: 600; text-decoration-color: var(--line-strong); }
.pic figcaption a:hover { text-decoration-color: currentColor; }
@media (max-width: 759px) {
  .pic-stage { grid-template-columns: minmax(0, 1fr); }
  .pic-video { padding-bottom: 36px; }
  .pic-doc { max-height: 330px; margin: -24px 10px 0; }
  .pic-bar { padding-right: 4px; }
  .pic-para { gap: 10px; }
}

/* ---------- The three moments ---------- */
.moment { padding: clamp(40px, 6vw, 76px) 0; }
.moment h2 { font: 700 clamp(2rem, 4.5vw, 3.5rem)/1.05 var(--font-display); letter-spacing: -.035em; text-wrap: balance; overflow-wrap: break-word; min-width: 0; }
.moment-row { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); align-items: center; gap: 44px clamp(32px, 7vw, 110px); max-width: 1120px; }
.moment-words p { max-width: 29em; margin-top: 18px; font-size: var(--t); line-height: 1.5; color: var(--ink-2); text-wrap: pretty; }
.moment-words .moment-link, .moment-words .moment-link#downloader { margin-top: 14px; padding: 0; }
.moment-link a { display: inline-block; padding: 10px 0; color: var(--ink); font-weight: 600; text-decoration-color: var(--line-strong); }
.moment-link a:hover { text-decoration-color: currentColor; }
.moment-row-flip { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }
.moment-row-flip .moment-words { order: 2; }
.sheet { display: block; height: auto; border-radius: 10px; background: var(--sheet); box-shadow: var(--shadow-sheet); }

/* One: the popup, set on the dark of a recording. */
.moment-save .moment-pic { display: grid; place-items: center; padding: clamp(36px, 6vw, 72px) 24px; border-radius: clamp(18px, 2.6vw, 34px); background: var(--night); }
.shot-popup { display: block; width: min(100%, 380px); height: auto; filter: drop-shadow(0 30px 40px var(--pop-shade)); }

/* Two: the lecture as a document. The one band of colour on the page, edge to edge, and the largest picture. */
.moment-read { margin: clamp(40px, 6vw, 76px) 0; padding: clamp(64px, 9vw, 124px) 0 0; overflow: clip; background: var(--field); color: var(--on-field); }
.moment-read ::selection { background: var(--on-field); color: var(--field); }
.moment-read :focus-visible { outline-color: var(--on-field); }
.read-words { max-width: 50rem; margin-inline: auto; text-align: center; }
.moment-read h2 { font-size: clamp(2.2rem, 5.6vw, 4.3rem); }
.read-words p { max-width: 33em; margin: clamp(16px, 2vw, 24px) auto 0; font-size: var(--t); line-height: 1.5; text-wrap: balance; }
.read-words .read-quiet { max-width: none; margin-top: 10px; font-size: var(--t-s); }
.read-words .read-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0 30px; margin-top: 12px; }
.read-links a { display: inline-block; padding: 10px 0; font-weight: 650; }
.read-sheets { position: relative; display: block; max-width: 1000px; height: clamp(380px, 47vw, 620px); margin: clamp(36px, 5vw, 64px) auto 0; }
.sheet-section { position: absolute; top: 0; right: 0; width: 64%; box-shadow: var(--shadow-lift); }
.sheet-cover { position: absolute; top: 9%; left: 0; width: 44%; transform: rotate(-3deg); }
@media (max-width: 699px) {
  .sheet-cover { display: none; }
  .sheet-section { right: auto; left: 0; width: 150%; max-width: none; }
}

/* Three: the study material, three pages fanned. */
.fan { display: flex; align-items: center; padding: 5% 0; }
.fan a { flex: 0 0 44%; border-radius: 10px; transition: transform .5s var(--ease); }
.fan a:nth-child(1) { transform: rotate(-5deg) translateY(3%); }
.fan a:nth-child(2) { z-index: 1; flex-basis: 50%; margin-left: -19%; }
.fan a:nth-child(3) { margin-left: -19%; transform: rotate(5deg) translateY(3%); }
.fan a:hover, .fan a:focus-visible { z-index: 2; transform: translateY(-2%); }
.fan img { width: 100%; }

@media (max-width: 759px) {
  .moment-row { grid-template-columns: minmax(0, 1fr); }
  .moment-row-flip .moment-words { order: 0; }
}

/* ---------- The plainer sections: prices, questions, the button again ---------- */
.calm { padding: clamp(40px, 6vw, 76px) 0; }
.calm h2 { font: 700 clamp(1.9rem, 3.8vw, 3rem)/1.08 var(--font-display); letter-spacing: -.03em; text-wrap: balance; overflow-wrap: break-word; min-width: 0; }
.calm-narrow { max-width: 1120px; }
.calm-head p { max-width: 33em; margin-top: 14px; font-size: var(--t); line-height: 1.5; color: var(--ink-2); }
.calm-head p a { display: inline-block; padding: 10px 0; color: var(--ink); font-weight: 600; text-decoration-color: var(--line-strong); }
.calm-head p a:hover { text-decoration-color: currentColor; }

/* Two prices. */
.pcs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin-top: clamp(30px, 4vw, 52px); }
.pc { display: flex; flex-direction: column; gap: 18px; padding: clamp(26px, 3.6vw, 48px); border-radius: 24px; }
.pc-free { box-shadow: inset 0 0 0 1px var(--line-strong); }
.pc h3 { font: 650 1.125rem/1.2 var(--font-display); }
.pc-price { font-size: var(--t); line-height: 1; }
.pc-amount { font: 700 clamp(2.6rem, 4.6vw, 3.6rem)/1 var(--font-display); letter-spacing: -.035em; font-variant-numeric: tabular-nums; }
.pc-per { margin-left: .2em; color: var(--ink-2); }
.pc-alt { margin-top: -8px; font-size: var(--t-s); color: var(--ink-2); }
.pc-line { font-size: var(--t); line-height: 1.45; color: var(--ink-2); text-wrap: pretty; }
.pc-ticks { display: grid; gap: 10px; font-size: var(--t); line-height: 1.4; }
.pc-ticks li { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px; }
.pc-ticks .ic { margin-top: .12em; color: var(--ink-3); }
.pc-ai { font-size: var(--t-s); line-height: 1.5; color: var(--ink-2); text-wrap: pretty; }
.pc-ai .link-arrow { display: inline; color: var(--ink); white-space: nowrap; }
.pc-ai .link-arrow .ic { display: inline-block; vertical-align: -.18em; }
.pc > .btn { margin-top: auto; }
.pc-foot { font-size: var(--t-s); line-height: 1.5; color: var(--ink-3); text-wrap: pretty; }
.pc-foot a { color: var(--ink-2); }
@media (max-width: 759px) { .pcs { grid-template-columns: minmax(0, 1fr); } }

/* Four questions: plain rows that open. */
.qa-row { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 24px clamp(32px, 6vw, 96px); align-items: start; }
.qa { border-top: 1px solid var(--line); }
.qa details { border-bottom: 1px solid var(--line); }
.qa summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 66px;
  padding: 10px 2px;
  font-size: var(--t);
  font-weight: 600;
  line-height: 1.35;
  cursor: pointer;
  list-style: none;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary .ic { color: var(--ink-3); transition: transform .35s var(--ease); }
.qa details[open] summary .ic { transform: rotate(45deg); }
.qa details > div { display: grid; gap: 10px; max-width: 40em; padding: 0 2px 24px; font-size: var(--t); line-height: 1.55; color: var(--ink-2); }
.qa details ul { display: grid; gap: 6px; padding-left: 1.15em; list-style: disc; }
@media (max-width: 899px) { .qa-row { grid-template-columns: minmax(0, 1fr); } }

/* The closing line and the button. */
.last { padding-top: clamp(56px, 8vw, 110px); padding-bottom: clamp(84px, 11vw, 150px); text-align: center; }
.last h2 { font-size: clamp(2.3rem, 5.6vw, 4.3rem); letter-spacing: -.035em; }
.last-say { margin-top: 14px; font-size: var(--t); color: var(--ink-2); }
.last .btn { margin-top: clamp(24px, 3vw, 34px); }
.last-note { max-width: 30em; margin: 18px auto 0; font-size: var(--t-s); color: var(--ink-3); text-wrap: balance; }

/* Motion: the first screen arrives once, and the two pages of the reading edition rise into place as the
   band scrolls into view. Everything is in its place without either, and nothing moves for a reader who
   asked for no motion. */
@media (prefers-reduced-motion: no-preference) {
  @keyframes rise { from { opacity: 0; transform: translateY(14px); } }
  .top h1, .top-say, .top-act, .top-price, .pic { animation: rise .8s var(--ease) both; }
  .top-say { animation-delay: .07s; }
  .top-act, .top-price { animation-delay: .14s; }
  .pic { animation-delay: .24s; }
  @supports (animation-timeline: view()) {
    @keyframes sheet-up { from { transform: translateY(90px); } }
    @keyframes cover-up { from { transform: translateY(150px) rotate(-8deg); } }
    .sheet-section { animation: sheet-up linear both; animation-timeline: view(); animation-range: entry 0% cover 38%; }
    .sheet-cover { animation: cover-up linear both; animation-timeline: view(); animation-range: entry 0% cover 44%; }
  }
}
@media (prefers-reduced-motion: reduce) {
  .fan a, .qa summary .ic { transition: none; }
}

@media print {
  .pic-doc { max-height: none; }
  .pic-doc::after { display: none; }
}

/* ---------- How it works: the working demo at its top, then the evening ---------- */
.demo-sec { padding: clamp(28px, 4vw, 52px) 0 clamp(40px, 5vw, 72px); }
.demo-sec .section-head h2 { font: 700 clamp(1.85rem, 3.7vw, 3.05rem)/1.06 var(--font-display); letter-spacing: -.028em; text-wrap: balance; }
.evening-when { max-width: 54ch; margin-bottom: clamp(20px, 2.6vw, 32px); font-size: 1.08rem; line-height: 1.5; color: var(--ink-2); }
/* ==== end of pass 4 ==== */