@font-face { font-family: system-ui; src: local("Arial"); }
:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --panel: rgba(255,255,255,0.075);
  --panel-strong: rgba(255,255,255,0.12);
  --text: #f3f0e8;
  --muted: #b9b2a6;
  --line: rgba(255,255,255,0.16);
  --accent: #d4ff73;
  --accent-2: #8bd3ff;
  --shadow: 0 22px 80px rgba(0,0,0,0.38);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 18% 12%, rgba(212,255,115,0.14), transparent 30%),
    radial-gradient(circle at 78% 18%, rgba(139,211,255,0.12), transparent 32%),
    linear-gradient(145deg, #0b0d10 0%, #151217 48%, #0f1419 100%);
  color: var(--text);
  min-height: 100vh;
}
main { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.hero {
  min-height: 92vh;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 42px;
  align-items: center;
  padding: 54px 0 36px;
}
.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  font-weight: 700;
  margin: 0 0 18px;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  font-size: clamp(3rem, 8vw, 7.3rem);
  line-height: 0.86;
  letter-spacing: -0.075em;
  margin-bottom: 28px;
}
h2 {
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
  margin-bottom: 26px;
}
h3 { font-size: 1.18rem; margin-bottom: 12px; }
.lede {
  font-size: clamp(1.08rem, 2vw, 1.42rem);
  line-height: 1.45;
  color: var(--muted);
  max-width: 720px;
}
.facts { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.facts span, .downloads a {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.065);
  border-radius: 999px;
  padding: 10px 14px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.92rem;
}
.player-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(255,255,255,0.13), rgba(255,255,255,0.055));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}
.card-label { color: var(--accent-2); text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.75rem; font-weight: 800; margin-bottom: 16px; }
.waveform {
  width: 100%;
  min-height: 170px;
  object-fit: contain;
  border-radius: 22px;
  background: rgba(0,0,0,0.22);
  border: 1px solid var(--line);
  margin-bottom: 18px;
}
audio { width: 100%; height: 44px; }
.downloads { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.downloads a:hover { border-color: var(--accent); }
.process, .timeline, .method { padding: 72px 0; border-top: 1px solid var(--line); }
.conversation { padding: 72px 0; border-top: 1px solid var(--line); }
.conversation-intro { color: var(--muted); line-height: 1.62; max-width: 850px; margin-bottom: 24px; }
.chat-log {
  display: grid;
  gap: 14px;
  max-width: 980px;
}
.chat-row {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 18px 20px;
  background: var(--panel);
}
.chat-row p { margin: 0; color: var(--text); line-height: 1.55; }
.speaker {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 900;
}
.user-line { margin-right: clamp(0px, 12vw, 140px); background: rgba(212,255,115,0.075); }
.assistant-line { margin-left: clamp(0px, 12vw, 140px); background: rgba(139,211,255,0.07); }
.assistant-line .speaker { color: var(--accent-2); }

.story-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
article, .bar-map div, pre {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  padding: 22px;
}
article p, .method p, .bar-map span { color: var(--muted); line-height: 1.58; }
.step {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: #12140f;
  font-weight: 900;
  margin-bottom: 22px;
}
.bar-map {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 10px;
}
.bar-map div {
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.bar-map strong { font-size: 1.4rem; color: var(--accent-2); }
pre { overflow-x: auto; color: #efe9dc; line-height: 1.5; }
footer { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 50px; color: var(--muted); }
@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 44px; }
  .story-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bar-map { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .user-line, .assistant-line { margin-left: 0; margin-right: 0; }
  main, footer { width: min(100% - 22px, 1180px); }
  .story-grid, .bar-map { grid-template-columns: 1fr; }
  .player-card { padding: 16px; border-radius: 22px; }
}

.implementation { padding: 72px 0; border-top: 1px solid var(--line); }
.brief-box {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 22px;
}
.brief-box > div, .code-feature {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,0.10), rgba(255,255,255,0.055));
  padding: 24px;
}
.brief-box p, .code-copy p { color: var(--muted); line-height: 1.58; }
.code-feature {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: 22px;
  align-items: start;
}
.button-link {
  display: inline-flex;
  border: 1px solid var(--accent);
  background: rgba(212,255,115,0.12);
  color: var(--text);
  text-decoration: none;
  border-radius: 999px;
  padding: 11px 15px;
  font-weight: 800;
}
.code-feature pre { margin: 0; max-height: 420px; }
@media (max-width: 920px) {
  .brief-box, .code-feature { grid-template-columns: 1fr; }
}

.hero-video {
  width: 100%;
  display: block;
  border-radius: 22px;
  background: rgba(0,0,0,0.22);
  border: 1px solid var(--line);
}

.live-visualiser-card {
  overflow: hidden;
}
.live-visualiser {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  border-radius: 22px;
  background: #0b0d10;
  border: 1px solid var(--line);
}
.visualiser-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}
.visualiser-controls button {
  border: 1px solid var(--accent);
  background: rgba(212,255,115,0.14);
  color: var(--text);
  border-radius: 999px;
  padding: 11px 15px;
  font-weight: 800;
  cursor: pointer;
}
.visualiser-controls button:hover {
  background: rgba(212,255,115,0.22);
}
.visualiser-controls span {
  color: var(--muted);
  font-size: 0.92rem;
}

.section-intro {
  color: var(--muted);
  line-height: 1.65;
  max-width: 940px;
  margin: -8px 0 28px;
}
.extended-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.provenance {
  padding: 72px 0;
  border-top: 1px solid var(--line);
}
.provenance-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.provenance-grid div {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  padding: 22px;
}
.provenance-grid p {
  color: var(--muted);
  line-height: 1.58;
}
@media (max-width: 920px) {
  .extended-grid, .provenance-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .extended-grid, .provenance-grid { grid-template-columns: 1fr; }
}