:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-muted: #eef2f7;
  --text: #172033;
  --muted: #5f6b7a;
  --line: #dfe5ee;
  --accent: #2878c8;
  --accent-dark: #1e5f9f;
  --shadow: 0 18px 50px rgba(34, 48, 74, 0.11);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

img,
video {
  display: block;
  width: 100%;
  max-width: 100%;
}

.container {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.narrow {
  width: min(840px, calc(100% - 32px));
}

.hero {
  padding: 80px 0 48px;
  background:
    radial-gradient(circle at top left, rgba(40, 120, 200, 0.16), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f7f8fb 100%);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  text-align: center;
}

.venue {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.18;
}

h1 {
  max-width: 980px;
  margin: 0 auto 18px;
  font-size: clamp(2.05rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  margin: 0 0 22px;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  text-align: center;
}

h3 {
  margin: 8px 0 8px;
  font-size: 1.05rem;
}

.subtitle {
  max-width: 860px;
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: 1.15rem;
}

.authors {
  margin: 24px auto 28px;
  color: var(--muted);
}

.authors p {
  margin: 6px 0;
}

.authors a {
  font-weight: 650;
}

.affiliations {
  font-size: 0.95rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--text);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(23, 32, 51, 0.16);
}

.button:hover {
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
}

.button.disabled {
  background: #687385;
  cursor: not-allowed;
  opacity: 0.85;
}

.section {
  padding: 58px 0;
}

.demo-section {
  background: #0d1626;
  color: #fff;
}

.demo-page { min-height: 100vh; background: #0d1626; }
.demo-page .demo-section { padding-top: 42px; }
.demo-nav { border-bottom: 1px solid #26364e; background: #0a1220; }
.demo-nav .container { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.demo-nav a { color: #b8c9df; font-weight: 650; }
.demo-nav strong { display: inline-flex; align-items: center; gap: 9px; color: #fff; }

.demo-heading {
  max-width: 720px;
  margin: 0 auto 28px;
  text-align: center;
}

.demo-heading h1 { margin-bottom: 10px; font-size: clamp(2rem, 5vw, 3.25rem); }
.demo-heading p { margin: 0; color: #aebbd0; }
.demo-heading .eyebrow { color: #63b3ff; font-size: .8rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }

.demo-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  overflow: hidden;
  min-height: 520px;
  border: 1px solid #2a3951;
  border-radius: 18px;
  background: #121e31;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .35);
}

.demo-avatar { position: relative; min-height: 420px; background: #050a12; }
.demo-avatar video { width: 100%; height: 100%; min-height: 520px; object-fit: cover; }
.demo-avatar-meta { position: absolute; top: 18px; left: 18px; display: flex; align-items: center; gap: 10px; padding: 9px 13px; border: 1px solid rgba(255,255,255,.16); border-radius: 12px; background: rgba(5,10,18,.76); backdrop-filter: blur(10px); }
.demo-avatar-meta strong, .demo-avatar-meta small { display: block; }
.demo-avatar-meta small { color: #aebbd0; font-size: .72rem; }
.live-dot { width: 9px; height: 9px; border-radius: 50%; background: #23d5ab; box-shadow: 0 0 0 5px rgba(35,213,171,.13); }

.demo-chat { display: flex; flex-direction: column; min-height: 520px; padding: 22px; }
.demo-messages { flex: 1; overflow-y: auto; max-height: 310px; padding-right: 6px; }
.message { max-width: 92%; margin-bottom: 14px; }
.message span { display: block; margin-bottom: 4px; color: #8fa2bd; font-size: .72rem; font-weight: 700; }
.message p { display: inline-block; margin: 0; padding: 11px 14px; border-radius: 4px 15px 15px 15px; background: #22324b; color: #edf4ff; line-height: 1.45; }
.message.user { margin-left: auto; text-align: right; }
.message.user p { border-radius: 15px 4px 15px 15px; background: #2878c8; color: #fff; text-align: left; }
.message.thinking p { color: #aebbd0; }

.demo-suggestions { display: flex; flex-wrap: wrap; gap: 7px; margin: 12px 0; }
.demo-suggestions button { padding: 7px 10px; border: 1px solid #344760; border-radius: 999px; background: transparent; color: #b9c8db; cursor: pointer; }
.demo-suggestions button:hover { border-color: #63b3ff; color: #fff; }
.demo-form { display: flex; gap: 8px; }
.demo-form input { flex: 1; min-width: 0; padding: 12px 14px; border: 1px solid #344760; border-radius: 10px; outline: none; background: #0b1423; color: #fff; font: inherit; }
.demo-form input:focus { border-color: #63b3ff; box-shadow: 0 0 0 3px rgba(99,179,255,.12); }
.demo-form button { padding: 0 17px; border: 0; border-radius: 10px; background: #2878c8; color: #fff; font-weight: 750; cursor: pointer; }
.demo-form button:hover { background: #3490ea; }
.demo-notice { margin: 10px 0 0; color: #8191aa !important; font-size: .7rem; line-height: 1.35; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.teaser-section {
  padding-top: 34px;
}

.section p {
  color: var(--muted);
}

.media-card,
.video-card {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.media-card img,
.video-card video {
  min-height: 240px;
  object-fit: cover;
  background:
    linear-gradient(135deg, rgba(40, 120, 200, 0.14), rgba(23, 32, 51, 0.04)),
    var(--surface-muted);
}

.media-card figcaption,
.caption {
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 0.96rem;
  text-align: center;
}

.media-card figcaption {
  padding: 0 18px 18px;
}

.pipeline-grid,
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 22px;
}

.pipeline-grid article {
  min-height: 210px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.pipeline-grid p {
  margin: 0;
}

.step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: #e9f3ff;
  color: var(--accent-dark);
  font-weight: 800;
  font-size: 0.85rem;
}

.video-grid {
  grid-template-columns: repeat(2, 1fr);
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #101827;
  color: #eef6ff;
  font-size: 0.92rem;
  line-height: 1.55;
}

.footer {
  padding: 34px 0 44px;
  border-top: 1px solid var(--line);
  background: #ffffff;
  text-align: center;
}

.footer p {
  margin: 0;
  color: var(--muted);
}

.asset-missing {
  display: grid;
  place-items: center;
  min-height: 240px;
  padding: 28px;
  background:
    linear-gradient(135deg, rgba(40, 120, 200, 0.14), rgba(23, 32, 51, 0.04)),
    var(--surface-muted);
  color: var(--muted);
  text-align: center;
  font-weight: 650;
}

@media (max-width: 860px) {
  .hero {
    padding: 56px 0 38px;
  }

  .pipeline-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .pipeline-grid article {
    min-height: auto;
  }

  .demo-shell { grid-template-columns: 1fr; }
  .demo-avatar, .demo-avatar video { min-height: 360px; height: 360px; }
  .demo-chat { min-height: 480px; }
}

@media (max-width: 520px) {
  .container,
  .narrow {
    width: min(100% - 24px, 1080px);
  }

  .section {
    padding: 42px 0;
  }

  .button-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}

/* Standalone booth preview */
:root { --booth-accent: #36d5b4; }
.booth-page { min-height: 100vh; overflow-x: hidden; background: #07101c; color: #f5f8fc; }
.booth-page button, .booth-page input, .booth-page select { font: inherit; }
.booth-app { min-height: 100vh; background: radial-gradient(circle at 50% 48%, rgba(24,137,126,.14), transparent 34%), #07101c; }
.booth-topbar { position: relative; z-index: 20; height: 68px; border-bottom: 1px solid #243043; background: rgba(7,14,25,.94); }
.booth-topbar { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 max(18px, calc((100vw - 1320px)/2)); }
.booth-topbar a { color: #afbed1; font-weight: 700; }
.booth-brand { display: flex; align-items: center; gap: 9px; color: #fff !important; font-size: 1.08rem; }
.booth-brand i, .room-status i, .avatar-state i { width: 9px; height: 9px; border-radius: 50%; background: var(--booth-accent); box-shadow: 0 0 0 5px color-mix(in srgb, var(--booth-accent) 15%, transparent); }
.booth-top-actions { display: flex; justify-content: flex-end; align-items: center; gap: 10px; }
.booth-top-actions button, .booth-top-actions a { padding: 8px 12px; border: 1px solid #2b394e; border-radius: 9px; background: #101b2b; color: #c5d1e1; cursor: pointer; }
.booth-top-actions span { display: inline-grid; place-items: center; min-width: 18px; height: 18px; margin-left: 4px; border-radius: 9px; background: #263750; font-size: .7rem; }
.booth-main { min-height: calc(100vh - 68px); }
.booth-welcome { position: relative; display: grid; justify-items: center; align-content: center; min-height: calc(100vh - 68px); padding: 40px 20px; text-align: center; overflow: hidden; }
.booth-welcome h1 { z-index: 2; margin: 0; font-size: clamp(4rem, 11vw, 8rem); letter-spacing: -.06em; }
.booth-welcome > p:not(.booth-kicker) { z-index: 2; margin: 8px 0 30px; color: #a9b7c9; font-size: 1.08rem; }
.booth-kicker { z-index: 2; color: var(--booth-accent) !important; font-size: .76rem; font-weight: 850; letter-spacing: .16em; }
.booth-primary { border: 0; border-radius: 11px; background: linear-gradient(100deg, #2be2b2, #52a8ee); color: #07101c; font-weight: 900; cursor: pointer; box-shadow: 0 15px 38px rgba(38,205,174,.22); }
.booth-welcome .booth-primary { z-index: 2; width: min(320px, 80vw); padding: 16px; font-size: 1.04rem; }
.booth-welcome small { z-index: 2; margin-top: 14px; color: #66788f; }
.booth-orbits { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; }
.booth-orbits:before, .booth-orbits:after, .booth-orbits i { content: ''; position: absolute; width: min(740px, 78vw); height: 190px; border: 1px solid rgba(71,219,192,.13); border-radius: 50%; transform: rotate(-8deg); }
.booth-orbits:after { transform: rotate(10deg) scale(.76); }
.booth-orbits i:nth-child(1), .booth-orbits i:nth-child(2), .booth-orbits i:nth-child(3) { width: 30px; height: 30px; border: 0; background: #f49b72; box-shadow: 0 0 34px #f49b72; transform: translate(-280px, 30px); }
.booth-orbits i:nth-child(2) { background: #51e0bc; box-shadow: 0 0 34px #51e0bc; transform: translate(285px, 55px); }
.booth-orbits i:nth-child(3) { width: 20px; height: 20px; background: #7aa9ff; transform: translate(95px, -75px); }
.booth-setup { width: min(960px, calc(100% - 32px)); margin: 0 auto; padding: 64px 0; }
.setup-copy { text-align: center; }
.setup-copy span { color: var(--booth-accent); font-size: .75rem; font-weight: 850; letter-spacing: .15em; }
.setup-copy h1 { margin: 8px auto 10px; font-size: clamp(2rem, 5vw, 3.4rem); }
.setup-copy p { color: #8798ae; }
.avatar-options { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin: 34px 0 24px; }
.avatar-option { display: grid; justify-items: center; gap: 7px; padding: 24px 14px; border: 1px solid #27364c; border-radius: 16px; background: #0e1929; color: #fff; cursor: pointer; }
.avatar-option b { display: grid; place-items: center; width: 72px; height: 72px; border-radius: 50%; background: linear-gradient(145deg, #263850, #132033); color: #a9bdd4; font-size: 1.2rem; }
.avatar-option small { color: #7f91a8; }
.avatar-option.active { border-color: var(--booth-accent); box-shadow: 0 0 0 3px rgba(54,213,180,.1); }
.avatar-option.active b { color: #07101c; background: var(--booth-accent); }
.setup-field { display: grid; gap: 8px; max-width: 460px; margin: 0 auto; color: #9cacc0; font-size: .83rem; font-weight: 700; }
.setup-field select { padding: 12px; border: 1px solid #2b3c53; border-radius: 10px; background: #0e1929; color: #fff; }
.setup-actions { display: flex; justify-content: center; gap: 12px; margin-top: 28px; }
.setup-actions button { min-width: 140px; padding: 12px 18px; border: 1px solid #2b3c53; border-radius: 10px; background: #101c2d; color: #d3ddea; cursor: pointer; }
.setup-actions .booth-primary { color: #07101c; }
.booth-room { width: min(1380px, calc(100% - 28px)); margin: 0 auto; padding: 15px 0 28px; }
.room-status { display: flex; justify-content: center; align-items: center; gap: 18px; padding: 4px 0 13px; color: #8192a8; font-size: .76rem; }
.room-status span { display: flex; align-items: center; gap: 8px; }
.room-status strong { color: #dce5f1; font-variant-numeric: tabular-nums; }
.call-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.call-panel { position: relative; overflow: hidden; min-height: min(46vw, 520px); border: 1px solid #26364b; border-radius: 15px; background: #0b1524; }
.call-panel video { width: 100%; height: 100%; min-height: inherit; object-fit: cover; }
.panel-label { position: absolute; z-index: 4; top: 15px; left: 15px; padding: 7px 11px; border-radius: 8px; background: rgba(5,10,17,.76); color: #fff; font-weight: 750; backdrop-filter: blur(8px); }
.camera-empty { position: absolute; inset: 0; display: grid; place-content: center; justify-items: center; gap: 9px; color: #60738b; text-align: center; background: radial-gradient(circle, #15253b, #0a1422 68%); }
.camera-empty div { display: grid; place-items: center; width: 90px; height: 90px; border: 1px solid #2b4059; border-radius: 50%; font-size: 2.2rem; }
.camera-empty span { max-width: 260px; font-size: .8rem; }
.avatar-panel { background: #060c14; }
.avatar-state { position: absolute; top: 16px; right: 16px; display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 8px; background: rgba(5,10,17,.76); color: #b7c6d8; font-size: .73rem; }
.reply-caption { position: absolute; right: 5%; bottom: 34px; left: 5%; padding: 12px 15px; border-radius: 10px; background: rgba(5,10,17,.82); color: #eef5fc; text-align: center; backdrop-filter: blur(10px); }
.conversation-bar { display: grid; grid-template-columns: minmax(260px,1fr) auto minmax(300px,.9fr); align-items: center; gap: 12px; margin-top: 12px; padding: 12px; border: 1px solid #26364b; border-radius: 14px; background: #0d1828; }
.conversation-log { max-height: 86px; overflow-y: auto; color: #a7b6c9; font-size: .8rem; }
.conversation-log p { margin: 3px 0; color: #a7b6c9; }
.conversation-log p.user { color: #fff; }
.prompt-row { display: flex; gap: 6px; }
.prompt-row button { padding: 7px 9px; border: 1px solid #31445d; border-radius: 999px; background: transparent; color: #aebdd0; cursor: pointer; font-size: .72rem; }
.room-composer { display: flex; gap: 7px; }
.room-composer input { flex: 1; min-width: 0; padding: 11px 12px; border: 1px solid #304158; border-radius: 9px; background: #08111e; color: #fff; }
.room-composer button { padding: 0 15px; border: 0; border-radius: 9px; background: #2878c8; color: #fff; font-weight: 800; cursor: pointer; }
.call-controls { display: flex; justify-content: center; gap: 12px; margin: 15px 0 8px; }
.call-controls button { display: grid; justify-items: center; gap: 2px; min-width: 76px; padding: 8px 12px; border: 1px solid #2b3c53; border-radius: 12px; background: #101c2d; color: #aebdd0; cursor: pointer; }
.call-controls span { font-size: 1.15rem; }.call-controls em { font-style: normal; font-size: .75rem; }.call-controls button.active { color: var(--booth-accent); border-color: var(--booth-accent); }
.call-controls .record-control { color: #fff; background: #c7464d; border-color: #dd5960; }.call-controls .record-control.recording { animation: recordPulse 1s infinite; }
@keyframes recordPulse { 50% { box-shadow: 0 0 0 8px rgba(221,89,96,.13); } }
.booth-disclaimer { margin: 0; color: #61738b !important; font-size: .7rem; text-align: center; }
.history-drawer { position: fixed; z-index: 50; top: 0; right: 0; width: min(390px, 92vw); height: 100vh; padding: 22px; transform: translateX(105%); transition: transform .25s ease; border-left: 1px solid #2b3b51; background: #0a1422; box-shadow: -20px 0 50px rgba(0,0,0,.28); }
.history-drawer.open { transform: none; }.history-drawer > div:first-child { display: flex; justify-content: space-between; align-items: center; }.history-drawer h2 { margin: 0; text-align: left; font-size: 1.3rem; }.history-drawer button { border: 0; background: transparent; color: #bdc9d8; cursor: pointer; font-size: 1.7rem; }
.history-list { display: grid; gap: 10px; max-height: calc(100vh - 150px); overflow-y: auto; margin-top: 22px; }.history-list article { padding: 13px; border: 1px solid #293a51; border-radius: 11px; background: #0e1b2d; }.history-list time,.history-list small { display: block; color: #73869e; font-size: .7rem; }.history-list p { margin: 7px 0; color: #aab9cb; font-size: .8rem; }.empty-history { color: #71849c !important; }
.history-clear { width: 100%; padding: 10px !important; border: 1px solid #3a4b60 !important; border-radius: 9px; font-size: .8rem !important; }.drawer-scrim { position: fixed; z-index: 40; inset: 0; background: rgba(0,0,0,.55); }
.booth-toast { position: fixed; z-index: 60; right: 24px; bottom: 24px; padding: 11px 16px; border: 1px solid #36506c; border-radius: 9px; background: #15263b; color: #fff; box-shadow: 0 12px 34px rgba(0,0,0,.3); }
@media (max-width: 980px) { .conversation-bar { grid-template-columns: 1fr; }.prompt-row { overflow-x: auto; }.call-panel { min-height: 420px; } }
@media (max-width: 700px) { .booth-topbar { grid-template-columns: auto 1fr auto; }.booth-brand { justify-self: center; }.booth-top-actions a { display: none; }.booth-back { font-size: 0; }.booth-back:after { content: '← Back'; font-size: .82rem; }.avatar-options,.call-grid { grid-template-columns: 1fr; }.avatar-options { gap: 9px; }.avatar-option { grid-template-columns: auto 1fr; justify-items: start; text-align: left; }.avatar-option b { grid-row: span 2; width: 48px; height: 48px; }.call-panel { min-height: 340px; }.booth-room { width: min(100% - 16px, 1380px); }.call-controls { gap: 5px; }.call-controls button { min-width: 65px; padding: 7px; font-size: .72rem; } }