/* Bundled fonts (SIL OFL, see fonts/OFL.txt): Inter for text, Newsreader for headings. Each Inter file
   covers a weight range, so heavier text uses the 600 face instead of a synthesized bold. */
@font-face {
  font-family: "Inter";
  src: url("fonts/inter-latin-400-normal.woff2") format("woff2");
  font-weight: 100 450;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("fonts/inter-latin-500-normal.woff2") format("woff2");
  font-weight: 451 550;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("fonts/inter-latin-600-normal.woff2") format("woff2");
  font-weight: 551 900;
  font-display: swap;
}

@font-face {
  font-family: "Newsreader";
  src: url("fonts/newsreader-latin-500-normal.woff2") format("woff2");
  font-weight: 100 550;
  font-display: swap;
}

@font-face {
  font-family: "Newsreader";
  src: url("fonts/newsreader-latin-600-normal.woff2") format("woff2");
  font-weight: 551 900;
  font-display: swap;
}

/* :root holds the dark tokens; [data-theme="light"] on <html> (the default, set in index.html) switches them all. */
:root {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-2: #0e1428;
  --panel: rgba(24, 31, 50, 0.7);
  --panel-solid: #161d30;
  --card: rgba(19, 26, 44, 0.8);
  --card-solid: #131a2b;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.17);
  --fill-1: rgba(255, 255, 255, 0.035);
  --fill-2: rgba(255, 255, 255, 0.07);
  --fill-3: rgba(255, 255, 255, 0.12);
  --text: #eef2f7;
  --text-2: #aab4c4;
  --text-3: #727d91;
  --assistant: #5ee6d0;
  --assistant-soft: rgba(94, 230, 208, 0.12);
  --assistant-glow: rgba(94, 230, 208, 0.35);
  --human: #ffb86b;
  --human-soft: rgba(255, 184, 107, 0.12);
  --human-glow: rgba(255, 184, 107, 0.35);
  --action: #a6b4ff;
  --action-soft: rgba(166, 180, 255, 0.12);
  --action-glow: rgba(166, 180, 255, 0.45);
  --on-accent: #06121a;
  --danger: #ff6b6b;
  --reminder: #ffd166;
  --title-grad: linear-gradient(180deg, #ffffff 35%, #aebbd0 115%);
  --primary: #5ee6d0;
  --hero-name-grad: linear-gradient(100deg, #ffffff 0%, #ffffff 34%, #bdf7ee 46%, #b9c3ff 56%, #ffffff 68%, #ffffff 100%);
  --hero-sub: #dbe3ee;
  --hero-bg: radial-gradient(ellipse 120% 90% at 50% 28%, #16204a 0%, #0d1430 46%, #0b1020 78%);
  --hero-veil: rgba(11, 16, 32, 0.62);
  --spark-grad: linear-gradient(90deg, #7ff0de, #b9c3ff 55%, #ffd2a6);
  --aurora-1: rgba(94, 230, 208, 0.16);
  --aurora-2: rgba(124, 140, 255, 0.2);
  --aurora-3: rgba(255, 170, 90, 0.1);
  --aurora-4: rgba(124, 140, 255, 0.09);
  --dot: rgba(255, 255, 255, 0.07);
  --chapter-glow: rgba(124, 140, 255, 0.13);
  --hud: rgba(94, 230, 208, 0.42);
  --header-bg: rgba(11, 16, 32, 0.74);
  --clip-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  --glow: rgba(255, 255, 255, 0.055);
  --radius-lg: 22px;
  --radius-md: 16px;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  --font: "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-display: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

:root[data-theme="light"] {
  color-scheme: light;
  /* Meta's look: white pages, near-black slate text, Meta blue for actions and links, pastel gradient surfaces. */
  --bg: #ffffff;
  --bg-2: #ffffff;
  --panel: #ffffff;
  --panel-solid: #ffffff;
  --card: #ffffff;
  --card-solid: #ffffff;
  --line: rgba(28, 43, 51, 0.1);
  --line-strong: rgba(28, 43, 51, 0.17);
  --fill-1: rgba(28, 43, 51, 0.035);
  --fill-2: rgba(28, 43, 51, 0.06);
  --fill-3: rgba(28, 43, 51, 0.1);
  --text: #1c2b33;
  --text-2: #465a69;
  --text-3: #637686;
  --assistant: #0064e0;
  --assistant-soft: rgba(0, 100, 224, 0.08);
  --assistant-glow: rgba(0, 100, 224, 0.25);
  --human: #c94f27;
  --human-soft: rgba(201, 79, 39, 0.08);
  --human-glow: rgba(201, 79, 39, 0.24);
  --action: #0064e0;
  --action-soft: rgba(0, 100, 224, 0.08);
  --action-glow: rgba(0, 100, 224, 0.25);
  --primary: #0064e0;
  --on-accent: #ffffff;
  --danger: #d93025;
  --reminder: #b26b00;
  --title-grad: linear-gradient(180deg, #0b1317 40%, #2c3e4a 125%);
  --hero-name-grad: linear-gradient(100deg, #0b1317 0%, #0b1317 34%, #0064e0 46%, #4f8dff 56%, #0b1317 68%, #0b1317 100%);
  --hero-sub: #1c2b33;
  --hero-bg:
    radial-gradient(48% 60% at 0% 18%, #fbe9df 0%, rgba(251, 233, 223, 0) 72%),
    radial-gradient(40% 55% at 6% 82%, #f4e3f0 0%, rgba(244, 227, 240, 0) 72%),
    radial-gradient(55% 62% at 100% 0%, #dae8fc 0%, rgba(218, 232, 252, 0) 72%),
    radial-gradient(48% 58% at 100% 100%, #dcf4e6 0%, rgba(220, 244, 230, 0) 72%),
    radial-gradient(60% 50% at 50% 108%, #e4e4f6 0%, rgba(228, 228, 246, 0) 72%),
    #f6f8fd;
  --hero-veil: rgba(255, 255, 255, 0.5);
  --spark-grad: linear-gradient(90deg, #0b1317 0%, #0050c8 55%, #0082fb 100%);
  --aurora-1: transparent;
  --aurora-2: transparent;
  --aurora-3: transparent;
  --aurora-4: transparent;
  --dot: transparent;
  --chapter-glow: rgba(0, 100, 224, 0.06);
  --hud: rgba(0, 100, 224, 0.3);
  --header-bg: rgba(255, 255, 255, 0.86);
  --clip-shadow: 0 10px 26px rgba(16, 32, 64, 0.12);
  --glow: rgba(0, 100, 224, 0.05);
  --shadow: 0 20px 50px rgba(16, 32, 64, 0.1);
  /* Pastel surfaces sampled from meta.com product cards. */
  --meta-blue: linear-gradient(135deg, #e2edfd 0%, #ebe6fa 100%);
  --meta-peach: linear-gradient(135deg, #fdeee6 0%, #f7e5f0 100%);
  --meta-mint: linear-gradient(135deg, #e3eefd 0%, #dff5e8 100%);
}

/* Anything drawn over video keeps the dark palette in both themes. */
.viewport,
.fpv,
.task-media {
  --text: #eef2f7;
  --text-2: #aab4c4;
  --text-3: #8a95a8;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.17);
  --fill-1: rgba(255, 255, 255, 0.035);
  --fill-2: rgba(255, 255, 255, 0.07);
  --fill-3: rgba(255, 255, 255, 0.12);
  --assistant: #5ee6d0;
  --assistant-soft: rgba(94, 230, 208, 0.12);
  --assistant-glow: rgba(94, 230, 208, 0.35);
  --human: #ffb86b;
  --action: #a6b4ff;
  --action-soft: rgba(166, 180, 255, 0.12);
  --action-glow: rgba(166, 180, 255, 0.45);
  --on-accent: #06121a;
  --danger: #ff6b6b;
  --reminder: #ffd166;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

/* Only the root paints the base colour: an opaque body would cover the fixed .backdrop (z-index -1). */
html {
  background: var(--bg);
}

button {
  font: inherit;
  color: inherit;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1000px 620px at 8% -6%, var(--aurora-1), transparent 62%),
    radial-gradient(900px 600px at 100% 6%, var(--aurora-2), transparent 62%),
    radial-gradient(1000px 700px at 50% 112%, var(--aurora-3), transparent 62%),
    radial-gradient(700px 500px at -6% 58%, var(--aurora-4), transparent 65%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

.backdrop::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--dot) 1px, transparent 1.4px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 35%, #000 25%, transparent 85%);
  mask-image: radial-gradient(ellipse 85% 75% at 50% 35%, #000 25%, transparent 85%);
}

/* ---------- header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px clamp(18px, 4vw, 48px);
  border-bottom: 1px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease, backdrop-filter 0.35s ease;
}

.site-header.is-scrolled {
  backdrop-filter: blur(14px);
  background: var(--header-bg);
  border-bottom-color: var(--line);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--fill-1);
  color: var(--text-2);
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease, transform 0.3s ease;
}

.theme-toggle:hover {
  color: var(--text);
  background: var(--fill-2);
  transform: rotate(-15deg);
}

.theme-toggle svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle .i-moon,
:root[data-theme="light"] .theme-toggle .i-sun {
  display: none;
}

:root[data-theme="light"] .theme-toggle .i-moon {
  display: block;
}

/* Two copies of the Meta lockup: white wordmark for dark, dark wordmark for light. */
:root[data-theme="light"] .logo-dark,
.logo-light {
  display: none !important;
}

:root[data-theme="light"] .logo-light {
  display: inline-block !important;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand-meta {
  display: block;
  height: 19px;
  width: auto;
}

.brand-divider {
  width: 1px;
  height: 18px;
  background: var(--line-strong);
}

.site-nav {
  display: flex;
  gap: 6px;
}

.site-nav a {
  padding: 7px 13px;
  border-radius: 999px;
  color: var(--text-2);
  text-decoration: none;
  font-size: 16px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover {
  color: var(--text);
}

.site-nav a.is-active {
  color: var(--text);
  background: var(--fill-2);
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px) 96px;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  min-height: max(720px, 100vh);
  padding: 96px clamp(18px, 4vw, 48px) 88px;
  overflow: hidden;
  text-align: center;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: var(--hero-bg);
}

.hero-media canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

/* A soft veil behind the text block keeps it legible over the artwork. */
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 44% 48% at 50% 46%, var(--hero-veil), transparent 74%),
    linear-gradient(180deg, transparent 74%, var(--bg) 100%);
}

/* Glasses-HUD corner brackets framing the hero. */
.hero-hud {
  position: absolute;
  inset: 78px clamp(14px, 3vw, 40px) 34px;
  z-index: -1;
  pointer-events: none;
}

.hero-hud i {
  position: absolute;
  width: 34px;
  height: 34px;
  border: 0 solid var(--hud);
}

.hero-hud i:nth-child(1) {
  top: 0;
  left: 0;
  border-width: 2px 0 0 2px;
  border-top-left-radius: 10px;
}

.hero-hud i:nth-child(2) {
  top: 0;
  right: 0;
  border-width: 2px 2px 0 0;
  border-top-right-radius: 10px;
}

.hero-hud i:nth-child(3) {
  bottom: 0;
  left: 0;
  border-width: 0 0 2px 2px;
  border-bottom-left-radius: 10px;
}

.hero-hud i:nth-child(4) {
  bottom: 0;
  right: 0;
  border-width: 0 2px 2px 0;
  border-bottom-right-radius: 10px;
}

.hero-inner {
  width: 100%;
  max-width: 1240px;
}

.hero-title {
  margin: 0;
}

.hero-name {
  display: block;
  font-size: clamp(46px, 8vw, 108px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  background: var(--hero-name-grad);
  background-size: 250% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shine 9s ease-in-out infinite;
  font-family: var(--font-display);
}

.hero-sub {
  display: block;
  max-width: 1000px;
  margin: 18px auto 0;
  font-size: clamp(20px, 2.2vw, 27.5px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--hero-sub);
  text-wrap: balance;
  font-family: var(--font-display);
}

.authors {
  max-width: 1120px;
  margin: 26px auto 0;
  padding: 0;
  list-style: none;
  font-size: clamp(18.5px, 1.75vw, 24px);
  font-weight: 500;
  line-height: 1.55;
  color: var(--text-2);
  text-wrap: balance;
}

.authors li {
  display: inline-block;
  margin: 2px 12px;
  white-space: nowrap;
}

.authors a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1.5px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.authors a:hover,
.authors a:focus-visible {
  color: var(--primary);
  text-decoration-color: currentColor;
}

.affiliation {
  margin-top: 24px;
}

.meta-logo {
  height: clamp(40px, 4.6vw, 58px);
  width: auto;
  filter: drop-shadow(0 6px 28px rgba(0, 129, 251, 0.3));
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 26px;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--fill-2);
  backdrop-filter: blur(10px);
  color: var(--text);
  font-size: 16.5px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.link-btn svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.link-btn svg .fill {
  fill: currentColor;
  stroke: none;
}

a.link-btn:hover {
  transform: translateY(-1px);
}

.link-btn.is-primary {
  border-color: transparent;
  background: var(--primary);
  color: var(--on-accent);
}

.link-btn.is-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.hero-question {
  max-width: 980px;
  margin: 40px auto 0;
}

/* Sized so the paragraph balances into three even lines on desktop. */
.q-lead {
  max-width: 790px;
  margin: 0 auto;
  color: var(--text-2);
  font-size: 19px;
  line-height: 1.62;
  text-wrap: balance;
}

.q-main {
  max-width: 18em;
  margin: 18px auto 0;
  font-size: clamp(28.5px, 3.44vw, 43px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.01em;
  text-wrap: balance;
  font-family: var(--font-display);
}

.q-text {
  background: var(--spark-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.q-main .caret {
  display: inline-block;
  width: 3px;
  height: 0.9em;
  margin-left: 4px;
  vertical-align: -0.08em;
  background: var(--action);
  animation: blink 0.9s steps(1) infinite;
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 26px;
  width: 26px;
  height: 42px;
  margin-left: -13px;
  border-radius: 999px;
  border: 2px solid var(--line-strong);
}

.scroll-cue span {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 4px;
  height: 8px;
  margin-left: -2px;
  border-radius: 2px;
  background: var(--assistant);
  animation: cue 1.8s ease-in-out infinite;
}

/* ---------- chapters ---------- */
.chapter {
  padding-top: clamp(112px, 14vw, 200px);
  scroll-margin-top: 0;
}

.chapter-head {
  position: relative;
  isolation: isolate;
  max-width: 1240px;
  margin: 0 auto clamp(44px, 5.5vw, 72px);
  text-align: center;
}

.chapter-head::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -70px;
  z-index: -1;
  width: min(1100px, 92vw);
  height: 340px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, var(--chapter-glow), transparent);
  pointer-events: none;
}

.chapter-title {
  margin: 0;
  font-size: clamp(40px, 6.2vw, 82px);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.02em;
  background: var(--title-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-wrap: balance;
  font-family: var(--font-display);
}

.chapter-lede {
  max-width: 1200px;
  margin: 22px auto 0;
  color: var(--text-2);
  font-size: clamp(18.5px, 1.81vw, 21.5px);
  line-height: 1.6;
  text-wrap: balance;
}

.demo-head {
  margin: 0 auto 28px;
  text-align: center;
}

.demo-title {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin: 0;
  font-size: clamp(31px, 4.12vw, 45.5px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  font-weight: 600;
  background: var(--title-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-family: var(--font-display);
}

.demo-live {
  flex: none;
  width: 0.32em;
  height: 0.32em;
  border-radius: 50%;
  background: var(--assistant);
  animation: live 2.4s ease-out infinite;
}

@keyframes live {
  0% {
    box-shadow: 0 0 0 0 var(--assistant-glow);
  }
  70%,
  100% {
    box-shadow: 0 0 0 0.36em transparent;
  }
}

.demo-intro {
  max-width: 1100px;
  margin: 14px auto 0;
  color: var(--text-2);
  font-size: 18.5px;
  line-height: 1.6;
  text-align: center;
  text-wrap: balance;
}

/* Brief cross-fade while the theme switches. */
html.theme-anim *,
html.theme-anim *::before,
html.theme-anim *::after {
  transition: background-color 0.35s ease, border-color 0.35s ease, color 0.35s ease, fill 0.35s ease !important;
}

/* Scroll-in reveal; the js class is set in <head> so content stays visible without scripts. */
.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

.lede {
  margin: 22px auto 0;
  max-width: 740px;
  color: var(--text-2);
  font-size: clamp(18px, 1.78vw, 20px);
  line-height: 1.6;
}

/* ---------- console rows ---------- */
.demo {
  position: relative;
  /* Keep the three rows and the 960x760 view on one screen. */
  width: clamp(600px, calc((100vh - 400px) * 1.263), 100%);
  margin: 0 auto;
  scroll-margin-top: 76px;
}

.console {
  display: grid;
  gap: 10px;
  margin-bottom: 14px;
}

.row {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  align-items: start;
  padding: 12px 16px 13px 14px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  transition: border-color 0.35s ease, box-shadow 0.35s ease, background 0.35s ease;
}

.avatar {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
}

.avatar svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.avatar-assistant {
  color: var(--assistant);
  background: var(--assistant-soft);
}

.avatar-assistant svg {
  fill: currentColor;
  stroke: none;
}

.avatar-human {
  color: var(--human);
  background: var(--human-soft);
}

.avatar-actions {
  color: var(--action);
  background: var(--action-soft);
}

.row-main {
  min-width: 0;
}

.row-label {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 18px;
  margin-bottom: 4px;
  font-size: 13.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.who-name {
  font-weight: 700;
}

.row-assistant .who-name {
  color: var(--assistant);
}

.row-human .who-name {
  color: var(--human);
}

.row-actions .who-name {
  color: var(--action);
}

.who-sub {
  color: var(--text-3);
  letter-spacing: 0.04em;
  text-transform: none;
  font-size: 14px;
}

.speech {
  margin: 0;
  font-size: 18px;
  line-height: 1.55;
  color: var(--text);
}

.speech.is-long {
  font-size: 16px;
  line-height: 1.5;
}

.row-assistant .speech.is-long {
  max-height: 7.6em;
}

.row-human .speech {
  max-height: 4.65em;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.row-assistant .speech {
  min-height: 1.55em;
  max-height: 6.2em;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.speech .caret {
  display: inline-block;
  width: 2px;
  height: 1.05em;
  margin-left: 2px;
  vertical-align: -0.15em;
  background: currentColor;
  animation: blink 0.9s steps(1) infinite;
}

.row-assistant.is-speaking {
  border-color: color-mix(in srgb, var(--assistant) 42%, transparent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--assistant) 14%, transparent), 0 12px 40px color-mix(in srgb, var(--assistant) 9%, transparent);
}

.row-human.is-speaking {
  border-color: color-mix(in srgb, var(--human) 42%, transparent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--human) 14%, transparent), 0 12px 40px color-mix(in srgb, var(--human) 8%, transparent);
}

.row-actions.is-acting {
  border-color: color-mix(in srgb, var(--action) 34%, transparent);
}

/* Watch-over-me alerts: the assistant row turns red for a hazard and amber for a reminder. */
.row-assistant[data-alert="danger"] {
  border-color: rgba(255, 107, 107, 0.65);
  background: linear-gradient(0deg, rgba(255, 107, 107, 0.09), rgba(255, 107, 107, 0.09)), var(--panel);
  box-shadow: 0 0 0 1px rgba(255, 107, 107, 0.18), 0 12px 40px rgba(255, 107, 107, 0.12);
}

.row-assistant[data-alert="reminder"] {
  border-color: rgba(255, 209, 102, 0.6);
  background: linear-gradient(0deg, rgba(255, 209, 102, 0.08), rgba(255, 209, 102, 0.08)), var(--panel);
  box-shadow: 0 0 0 1px rgba(255, 209, 102, 0.16), 0 12px 40px rgba(255, 209, 102, 0.1);
}

.alert-badge {
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #0b0f1a;
  animation: fade-in 0.25s ease both;
}

.row-assistant[data-alert="danger"] .alert-badge {
  background: var(--danger);
}

.row-assistant[data-alert="reminder"] .alert-badge {
  background: var(--reminder);
}

.wave {
  display: inline-flex;
  gap: 3px;
  height: 14px;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.wave i {
  width: 3px;
  height: 5px;
  border-radius: 2px;
  background: var(--assistant);
  animation: wave 1s ease-in-out infinite;
}

.wave i:nth-child(2) {
  animation-delay: 0.15s;
}

.wave i:nth-child(3) {
  animation-delay: 0.3s;
}

.wave i:nth-child(4) {
  animation-delay: 0.45s;
}

.row-assistant.is-speaking .wave {
  opacity: 1;
}

/* ---------- choices ---------- */
.choices {
  display: grid;
  gap: 8px;
}

.choice {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 14px;
  text-align: left;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--human) 34%, transparent);
  background: linear-gradient(90deg, color-mix(in srgb, var(--human) 13%, transparent), color-mix(in srgb, var(--human) 3%, transparent));
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.choice:hover,
.choice:focus-visible {
  outline: none;
  transform: translateX(3px);
  border-color: color-mix(in srgb, var(--human) 75%, transparent);
  box-shadow: 0 8px 26px color-mix(in srgb, var(--human) 15%, transparent);
}

.choice-index {
  flex: none;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--human);
  letter-spacing: 0.08em;
}

.choice-text {
  flex: 1;
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--text);
}

.choice-go {
  flex: none;
  color: var(--human);
  font-size: 18.5px;
  opacity: 0.8;
}

.choice.is-soon {
  border-color: var(--line);
  background: var(--fill-1);
}

.choice.is-soon:hover {
  border-color: var(--line-strong);
  box-shadow: none;
}

.choice.is-soon .choice-index {
  color: var(--text-3);
}

.choice.is-soon .choice-text {
  color: var(--text-2);
}

.soon-badge {
  flex: none;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  border: 1px solid var(--line-strong);
}

.notice {
  margin: 10px 0 0;
  font-size: 15px;
  color: var(--text-3);
}

/* ---------- action pills ---------- */
.pills {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 6px;
  margin: 0 -4px;
  padding: 6px 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 22px, #000 calc(100% - 22px), transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 22px, #000 calc(100% - 22px), transparent 100%);
}

.pills::-webkit-scrollbar {
  display: none;
}

.pill {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--text-3);
  font-size: 15.5px;
  white-space: nowrap;
  transition: color 0.3s ease, background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  animation: pill-in 0.45s ease both;
}

.pill-verb {
  font-family: var(--mono);
  font-weight: 650;
  letter-spacing: -0.01em;
}

.pill-args {
  margin-left: -1px;
  font-family: var(--mono);
  letter-spacing: -0.02em;
  opacity: 0.82;
}

.pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.5;
}

.pill.is-active {
  color: var(--on-accent);
  background: var(--action);
  border-color: var(--action);
  box-shadow: 0 0 0 4px var(--action-soft), 0 0 22px var(--action-glow);
}

.pill.is-active .pill-dot {
  opacity: 1;
  animation: pulse 1.1s ease-in-out infinite;
}

.pill.is-done {
  color: var(--text-2);
  background: var(--action-soft);
  border-color: color-mix(in srgb, var(--action) 25%, transparent);
}

.pill.is-done .pill-dot {
  width: 5px;
  height: 9px;
  opacity: 1;
  background: none;
  border-radius: 0;
  border: solid var(--action);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -2px);
}

.pill-sep {
  flex: none;
  color: var(--text-3);
  font-size: 14px;
  opacity: 0.6;
}

.placeholder {
  margin: 0;
  color: var(--text-3);
  font-size: 16px;
}

/* ---------- video viewport ---------- */
.viewport {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 960 / 760;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: #000;
  box-shadow: var(--shadow);
}

.viewport video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.viewport::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), inset 0 -80px 120px rgba(0, 0, 0, 0.25);
}

.hud {
  position: absolute;
  left: 16px;
  right: 16px;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.hud-top {
  top: 14px;
}

.hud-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 11px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 14px;
  color: #e6ebf2;
}

.hud-time {
  font-family: var(--mono);
}

.rec-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #8a93a3;
}

.viewport[data-state="playing"] .rec-dot {
  background: #ff5d5d;
  box-shadow: 0 0 10px rgba(255, 93, 93, 0.8);
  animation: pulse 1.4s ease-in-out infinite;
}

.hud-cta {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 184, 107, 0.4);
  color: #ffe2bf;
  font-size: 16px;
  transition: opacity 0.4s ease;
  animation: float 2.6s ease-in-out infinite;
}

.viewport:not([data-state="idle"]) .hud-cta {
  opacity: 0;
  pointer-events: none;
}

.end-card {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 10px;
  padding: 24px;
  text-align: center;
  background: radial-gradient(closest-side, rgba(7, 9, 13, 0.82), rgba(7, 9, 13, 0.6));
  backdrop-filter: blur(3px);
  animation: fade-in 0.5s ease both;
}

.end-card[hidden] {
  display: none;
}

.end-title {
  margin: 0;
  font-size: 28.5px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-family: var(--font-display);
}

.end-body {
  margin: 0;
  max-width: 460px;
  color: var(--text-2);
  font-size: 17.5px;
  line-height: 1.5;
}

.end-buttons {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.btn {
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--fill-2);
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: var(--fill-3);
}

.btn-primary {
  border-color: transparent;
  background: var(--assistant);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--assistant);
  filter: brightness(1.1);
}

/* ---------- timeline ---------- */
.timeline {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 14px 8px 8px;
  border-radius: 999px;
  background: rgba(6, 8, 12, 0.55);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.viewport[data-state="idle"] .timeline {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}

.play-toggle {
  flex: none;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 0;
  background: rgba(255, 255, 255, 0.14);
  cursor: pointer;
}

.play-toggle:disabled {
  opacity: 0.35;
  cursor: default;
}

.play-toggle svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.play-toggle .i-pause,
.timeline.is-playing .play-toggle .i-play {
  display: none;
}

.timeline.is-playing .play-toggle .i-pause {
  display: block;
}

.track {
  position: relative;
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
}

.track-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--assistant), var(--action));
}

.track-marks span {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-left: -5px;
  border-radius: 50%;
  transform: translateY(-50%);
  border: 2px solid var(--bg);
}

.track-marks .mark-assistant {
  background: var(--assistant);
}

.track-marks .mark-human {
  background: var(--human);
}

.track-marks .mark-alert-danger {
  background: var(--danger);
}

.track-marks .mark-alert-reminder {
  background: var(--reminder);
}

.legend {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: none;
  color: var(--text-3);
  font-size: 14px;
}

.legend .dot {
  width: 8px;
  height: 8px;
  margin-left: 6px;
  border-radius: 50%;
}

.dot-assistant {
  background: var(--assistant);
}

.dot-human {
  background: var(--human);
}

/* ---------- simulator sections ---------- */
.sim {
  position: relative;
  left: 50%;
  width: min(1440px, calc(100vw - 2 * clamp(16px, 4vw, 32px)));
  margin-top: clamp(96px, 13vw, 168px);
  transform: translateX(-50%);
  scroll-margin-top: 76px;
}

.sim + .sim {
  margin-top: clamp(88px, 11vw, 144px);
}

.sim-head {
  margin: 0 auto 34px;
  max-width: 1440px;
  text-align: center;
}

.sim-head h2 {
  margin: 0;
  font-size: clamp(31px, 4.12vw, 45.5px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  font-weight: 600;
  background: var(--title-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-wrap: balance;
  font-family: var(--font-display);
}

.sim-head .lede {
  max-width: 1320px;
  margin-top: 18px;
  text-wrap: balance;
}

.sim-head code,
.cmd {
  font-family: var(--mono);
  letter-spacing: -0.02em;
}

.sim-head code {
  white-space: nowrap;
  padding: 2px 7px;
  border-radius: 7px;
  color: var(--action);
  background: var(--action-soft);
  font-size: 0.88em;
}

.clip {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--panel-solid);
  aspect-ratio: 960 / 760;
  box-shadow: var(--clip-shadow);
}

.clip video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 26px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.action-tile {
  text-align: center;
}

.action-tile .clip {
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.action-tile:hover .clip {
  transform: translateY(-3px);
  border-color: rgba(166, 180, 255, 0.35);
}

.action-name {
  margin: 12px 0 2px;
  font-size: 18.5px;
  font-weight: 600;
  letter-spacing: 0;
  font-family: var(--font-display);
}

.cmd {
  margin: 0;
  color: var(--action);
  font-size: 14.5px;
  line-height: 1.45;
}

.auto-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.auto-card {
  margin: 0;
  padding: 12px 12px 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--panel);
}

.auto-card figcaption {
  padding: 14px 6px 0;
}

.auto-card h3 {
  margin: 0 0 6px;
  font-size: 21.5px;
  letter-spacing: -0.005em;
  font-family: var(--font-display);
  font-weight: 600;
}

.auto-text {
  margin: 10px 0 0;
  color: var(--text-2);
  font-size: 16.5px;
  line-height: 1.55;
  text-wrap: pretty;
}

.auto-card .cmd {
  text-wrap: balance;
}

@media (max-width: 1000px) {
  .action-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .auto-grid {
    grid-template-columns: 1fr;
    max-width: 640px;
    margin: 0 auto;
  }
}

@media (max-width: 560px) {
  .action-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.site-footer {
  margin-top: 56px;
  text-align: center;
  color: var(--text-3);
  font-size: 14.5px;
}

/* ---------- animation ---------- */
@keyframes blink {
  50% {
    opacity: 0;
  }
}

@keyframes wave {
  0%,
  100% {
    height: 5px;
  }
  50% {
    height: 17px;
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.35);
  }
}

@keyframes pill-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
}

@keyframes float {
  0%,
  100% {
    transform: translate(-50%, 0);
  }
  50% {
    transform: translate(-50%, -4px);
  }
}

@keyframes shine {
  0%,
  100% {
    background-position: 100% 0;
  }
  50% {
    background-position: 0 0;
  }
}

@keyframes cue {
  0% {
    opacity: 0;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(14px);
  }
}

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .demo {
    width: 100%;
  }
  .authors li {
    margin: 1px 7px;
  }
  .legend {
    display: none;
  }
  .brand-divider,
  .brand-name,
  .nav-pre,
  .hero-hud {
    display: none;
  }
  .header-right {
    gap: 4px;
  }
  .site-nav {
    gap: 2px;
  }
  .site-nav a {
    padding: 7px 10px;
    font-size: 14.5px;
  }
  .hero {
    padding-top: 84px;
    padding-bottom: 124px;
  }
  .authors {
    font-size: 15.5px;
  }
}

/* Short laptop screens: tighten the hero so the closing question stays above the fold. */
@media (min-width: 761px) and (max-height: 860px) {
  .hero {
    padding-top: 72px;
    padding-bottom: 56px;
  }
  .hero-name {
    font-size: clamp(46px, min(8vw, 12vh), 108px);
  }
  .hero-sub {
    margin-top: 12px;
    font-size: clamp(20px, min(2.2vw, 3.4vh), 27.5px);
  }
  .authors {
    margin-top: 12px;
    font-size: clamp(18.5px, min(1.75vw, 2.9vh), 24px);
  }
  .affiliation {
    margin-top: 10px;
  }
  .meta-logo {
    height: clamp(38px, 5.6vh, 58px);
  }
  .hero-links {
    margin-top: 14px;
  }
  .hero-question {
    margin-top: 20px;
  }
  .q-lead {
    font-size: min(19px, 2.5vh);
  }
  .q-main {
    font-size: clamp(28.5px, min(3.44vw, 5.4vh), 43px);
  }
}

@media (min-width: 761px) and (max-height: 760px) {
  .scroll-cue {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- kitchen HUD (story clock, appliances, allergens) ---------- */
.hud-panel {
  position: absolute;
  top: 54px;
  padding: 11px 13px 12px;
  border-radius: 14px;
  background: rgba(6, 8, 12, 0.74);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #e6ebf2;
  pointer-events: none;
  animation: fade-in 0.5s ease both;
}

.hud-kitchen {
  right: 16px;
  width: 232px;
}

.clock-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 18px;
}

.clock-label,
.avoid-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}

.clock-skip {
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #0b0f1a;
  background: var(--human);
  animation: fade-in 0.25s ease both;
}

.clock-value {
  margin-top: 2px;
  font-family: var(--mono);
  font-size: 28.5px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.clock-limit {
  margin-left: 6px;
  font-size: 15px;
  color: var(--text-3);
}

.clock-bar {
  height: 4px;
  margin: 6px 0 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.clock-bar span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--assistant), var(--human));
  transition: width 0.25s linear;
}

.appliances {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.appliance {
  display: grid;
  grid-template-columns: 10px auto 1fr;
  grid-template-areas:
    "dot name timer"
    ". text text";
  column-gap: 8px;
  align-items: center;
  font-size: 14.5px;
}

.appliance-dot {
  grid-area: dot;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #59616e;
}

.appliance-name {
  grid-area: name;
  font-weight: 650;
}

.appliance-timer {
  grid-area: timer;
  justify-self: end;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--human);
}

.appliance-text {
  grid-area: text;
  font-size: 13.5px;
  color: var(--text-2);
}

.appliance[data-state="on"] .appliance-dot {
  background: #ff8a3d;
  box-shadow: 0 0 10px rgba(255, 138, 61, 0.9);
  animation: pulse 1.4s ease-in-out infinite;
}

.appliance[data-state="on"] .appliance-text {
  color: #ffd2ad;
}

.appliance[data-state="done"] .appliance-dot {
  background: var(--assistant);
  box-shadow: 0 0 10px var(--assistant-glow);
}

.appliance[data-state="done"] .appliance-text {
  color: var(--assistant);
}

.appliance[data-state="warn"] .appliance-dot {
  background: var(--danger);
  box-shadow: 0 0 10px rgba(255, 107, 107, 0.9);
  animation: pulse 0.9s ease-in-out infinite;
}

.appliance[data-state="warn"] .appliance-text {
  color: #ffb3b3;
}

.appliance[data-state="note"] .appliance-dot {
  background: var(--reminder);
  box-shadow: 0 0 10px rgba(255, 209, 102, 0.8);
}

.appliance[data-state="note"] .appliance-text {
  color: #ffe3a3;
}

.watch-title {
  margin: 0 0 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}

.hud-avoid {
  left: 16px;
  max-width: 250px;
}

.avoid-title {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 7px;
  color: #ff9a9a;
}

.avoid-icon {
  position: relative;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid #ff7b7b;
}

.avoid-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: -1px;
  bottom: -1px;
  width: 2px;
  margin-left: -1px;
  background: #ff7b7b;
  transform: rotate(45deg);
}

.avoid-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14.5px;
}

.avoid-list li {
  display: flex;
  gap: 8px;
}

.avoid-group {
  flex: none;
  width: 66px;
  font-weight: 650;
}

.avoid-foods {
  color: var(--text-2);
  text-decoration: line-through;
  text-decoration-color: rgba(255, 123, 123, 0.7);
}

@media (max-width: 760px) {
  .hud-panel {
    transform: scale(0.85);
    transform-origin: top right;
  }
  .hud-avoid {
    transform-origin: top left;
  }
}

/* ---------- side-by-side demo: rows left of the video so both fit one screen ---------- */
@media (min-width: 900px) {
  main {
    max-width: 1600px;
  }

  .demo {
    display: grid;
    grid-template-columns: minmax(300px, 390px) minmax(0, calc((100vh - 112px) * 1.263));
    justify-content: center;
    align-items: start;
    gap: 16px;
    width: 100%;
  }

  .console-wrap {
    position: relative;
    align-self: stretch;
    min-width: 0;
  }

  .console {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0;
  }

  .console .row {
    grid-template-rows: minmax(0, 1fr);
    min-height: 0;
    overflow: hidden;
  }

  .console .row-main {
    display: flex;
    flex-direction: column;
    min-height: 0;
    max-height: 100%;
  }

  .console .row-assistant {
    flex: 0 1 auto;
    max-height: 46%;
  }

  .console .row-human {
    flex: 0 1 auto;
    max-height: 32%;
  }

  .console .row-human[data-state="choose"] {
    max-height: 64%;
  }

  .console .row-actions {
    flex: 1 1 0;
    min-height: 118px;
  }

  .console .speech,
  .console .row-assistant .speech,
  .console .row-assistant .speech.is-long,
  .console .row-human .speech {
    flex: 0 1 auto;
    min-height: 0;
    max-height: none;
    overflow-y: auto;
  }

  .console .choices {
    overflow-y: auto;
    min-height: 0;
  }

  .console .pills {
    position: relative;
    flex: 1 1 auto;
    flex-wrap: wrap;
    align-content: flex-start;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 10px, #000 calc(100% - 14px), transparent 100%);
    mask-image: linear-gradient(180deg, transparent 0, #000 10px, #000 calc(100% - 14px), transparent 100%);
  }

  .console .pill-sep {
    display: none;
  }

  .console .pill {
    font-size: 15px;
  }
}

/* Larger, wider conversation column beside the video. */
@media (min-width: 900px) {
  .demo {
    grid-template-columns: minmax(320px, min(500px, 35vw)) minmax(0, calc((100vh - 112px) * 1.263));
  }

  .console .row-label {
    font-size: 15px;
  }

  .console .who-sub {
    font-size: 15.5px;
  }

  .console .speech,
  .console .row-assistant .speech,
  .console .row-human .speech {
    font-size: 19.5px;
    line-height: 1.55;
  }

  .console .speech.is-long,
  .console .row-assistant .speech.is-long {
    font-size: 18.5px;
    line-height: 1.5;
  }

  .console .choice-text {
    font-size: 18.5px;
  }

  .console .pill {
    font-size: 17.5px;
  }
}

/* ---------- light theme: Meta-style pastel surfaces ---------- */
/* :where() keeps these at the specificity of the base rules, so speaking, alert and active states still win. */
:where(:root[data-theme="light"]) .row {
  border-color: transparent;
  backdrop-filter: none;
}

:where(:root[data-theme="light"]) .row-assistant {
  background: var(--meta-blue);
}

:where(:root[data-theme="light"]) .row-human {
  background: var(--meta-peach);
}

:where(:root[data-theme="light"]) .row-actions {
  background: var(--meta-mint);
}

:where(:root[data-theme="light"]) .avatar {
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(16, 32, 64, 0.1);
}

:where(:root[data-theme="light"]) .choice {
  background: #ffffff;
  border-color: rgba(201, 79, 39, 0.2);
  box-shadow: 0 1px 3px rgba(16, 32, 64, 0.06);
}

:where(:root[data-theme="light"]) .pill {
  background: #ffffff;
}

:where(:root[data-theme="light"]) .link-btn {
  border-color: rgba(28, 43, 51, 0.08);
  background: #ffffff;
  color: var(--primary);
  box-shadow: 0 2px 10px rgba(16, 32, 64, 0.08);
  backdrop-filter: none;
}