/* ══ TOKENS ══ */
:root {
  --fg: #eaeaea; --fg2: #999; --fg3: #555; --fg4: #2a2a2a;
  --bg: #060606; --bg2: #101010; --bg3: #181818;
  --rule: rgba(255,255,255,0.07); --rule2: rgba(255,255,255,0.14);
}
[data-theme="light"] {
  --fg: #0c0c0c; --fg2: #4a4a4a; --fg3: #999; --fg4: #d0d0d0;
  --bg: #f6f6f4; --bg2: #eeeeec; --bg3: #e5e5e3;
  --rule: rgba(0,0,0,0.08); --rule2: rgba(0,0,0,0.15);
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--fg);
  overflow-x: hidden; line-height: 1.6;
  transition: background .4s, color .4s;
  padding-top: 44px; padding-bottom: 0;
}

/* ── TOPBAR ── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 400;
  height: 44px; padding: 0 44px;
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg); border-bottom: .5px solid var(--rule);
  transition: background .4s;
}
.tb-l { display: flex; align-items: center; gap: 32px; }
.tb-back {
  font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--fg3); background: none; border: none; cursor: pointer;
  font-family: inherit; transition: color .2s; text-decoration: none;
}
.tb-back:hover { color: var(--fg); }
.tb-meta { font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--fg3); }
.tb-r { display: flex; align-items: center; gap: 16px; }
.tb-date { font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--fg3); }
.theme-btn {
  font-size: 9px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--fg); background: none; border: .5px solid var(--rule2);
  padding: 5px 12px; cursor: pointer; font-family: inherit;
  transition: all .25s; white-space: nowrap;
}
.theme-btn:hover { background: var(--fg); color: var(--bg); }

/* ── DEMO SECTION ── */
.demo-section { padding: 100px 80px; border-top: .5px solid var(--rule); }
.demo-hdr { margin-bottom: 48px; }
.demo-hdr h2 {
  font-size: clamp(32px, 4.5vw, 48px); font-weight: 700;
  letter-spacing: -.025em; margin-bottom: 16px;
}
.demo-hdr p {
  font-size: 15px; color: var(--fg2); font-weight: 300;
  max-width: 640px; line-height: 1.7;
}
.demo-grid {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0;
  border: .5px solid var(--rule2);
}
.demo-pane {
  border-right: .5px solid var(--rule);
  display: flex; flex-direction: column; min-height: 360px; min-width: 0; overflow: hidden;
}
.demo-pane:last-child { border-right: none; }
.demo-ph {
  padding: 14px 22px; border-bottom: .5px solid var(--rule);
  display: flex; align-items: center; justify-content: space-between;
}
.demo-ph-title {
  font-size: 10px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--fg3);
}
.demo-pb { flex: 1; position: relative; overflow: hidden; background: var(--bg2); }
.demo-pb canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%; max-width: 100%; max-height: 100%;
  display: block; cursor: crosshair;
}
.demo-ctrl-row { padding: 14px 22px; border-top: .5px solid var(--rule); }
.gen-btn {
  width: 100%; padding: 12px; font-size: 10px;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--fg); background: transparent;
  border: .5px solid var(--rule2); cursor: pointer;
  font-family: inherit; transition: all .25s;
}
.gen-btn:hover { background: var(--fg); color: var(--bg); }
.token-stream {
  padding: 22px; font-family: "Courier New", monospace;
  font-size: 11px; line-height: 1.8; color: var(--fg2);
  overflow-y: auto; height: 100%; box-sizing: border-box;
}
.token-stream .tok {
  display: inline-block; padding: 2px 8px; margin: 2px 3px;
  background: var(--bg3); border: .5px solid var(--rule);
  border-radius: 2px; color: var(--fg); font-size: 10px;
}
.token-stream .tok.new { background: var(--fg); color: var(--bg); }

/* ── Reveal system ── */
.r { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.4,0,.2,1), transform .7s cubic-bezier(.4,0,.2,1); }
.r.v { opacity: 1; transform: translateY(0); }
.d1 { transition-delay: .1s; } .d2 { transition-delay: .2s; } .d3 { transition-delay: .3s; }

/* ── Hero ── */
.hero { padding: 100px 80px 80px; }
.hero-meta { display: flex; gap: 22px; margin-bottom: 32px;
  font-family: "Courier New", monospace; font-size: 10px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--fg3); }
.hero-meta span:not(:last-child)::after { content: ' · '; padding-left: 22px; color: var(--fg4); }
.hero-h {
  font-size: clamp(54px, 8vw, 110px); font-weight: 700;
  letter-spacing: -.035em; line-height: 1.02;
  margin-bottom: 40px;
}
.hero-h .line2 { color: var(--fg2); }
.hero-lede { font-size: 18px; line-height: 1.6; color: var(--fg2);
  max-width: 720px; font-weight: 300; }

/* ── Section ── */
.section { padding: 60px 80px; }
.section-label { font-family: "Courier New", monospace;
  font-size: 10px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--fg3); margin-bottom: 28px; display: block; }
.section-h { font-size: clamp(32px, 4.5vw, 48px); font-weight: 700;
  letter-spacing: -.025em; margin-bottom: 28px; }
.section-p { font-size: 15px; line-height: 1.8; color: var(--fg2);
  max-width: 760px; margin-bottom: 18px; font-weight: 300; }
.section-p strong { color: var(--fg); font-weight: 500; }

/* ── Pipeline diagram (full-bleed) ── */
.fig-bleed { margin: 36px -80px; padding: 56px 80px;
  background: var(--bg2);
  border-top: .5px solid var(--rule);
  border-bottom: .5px solid var(--rule); }
.fig-cap { font-size: 11px; color: var(--fg3); margin-top: 20px;
  font-style: italic; letter-spacing: .01em; line-height: 1.5; }

/* ── Method sub-section ── */
.method-grid { display: grid; grid-template-columns: 1fr 1fr;
  gap: 0; border: .5px solid var(--rule2); margin-top: 24px; }
.method-card { padding: 28px 32px; border-right: .5px solid var(--rule); }
.method-card:nth-child(2n) { border-right: none; }
.method-card:nth-child(-n+2) { border-bottom: .5px solid var(--rule); }
.mc-num { font-family: "Courier New", monospace; font-size: 10px;
  letter-spacing: .14em; color: var(--fg3); margin-bottom: 10px; }
.mc-h { font-size: 17px; font-weight: 700; letter-spacing: -.015em;
  margin-bottom: 12px; }
.mc-p { font-size: 13px; line-height: 1.75; color: var(--fg2);
  font-weight: 300; }
.mc-p code { font-family: "Courier New", monospace; font-size: 12px;
  background: var(--bg3); padding: 1px 6px; border-radius: 2px;
  color: var(--fg); }

/* ── Stat row ── */
.stats { display: flex; gap: 40px; flex-wrap: wrap;
  border-top: .5px solid var(--rule); border-bottom: .5px solid var(--rule);
  padding: 32px 0; margin-top: 32px; }
.stat { flex: 1; min-width: 160px; }
.stat-val { font-size: 30px; font-weight: 700; letter-spacing: -.02em;
  color: var(--fg); margin-bottom: 4px; }
.stat-lbl { font-family: "Courier New", monospace; font-size: 9px;
  letter-spacing: .16em; text-transform: uppercase; color: var(--fg3); }

/* ── Paper trigger ── */
.paper-trigger { padding: 72px 80px; display: flex;
  align-items: center; justify-content: space-between;
  border-top: .5px solid var(--rule); }
.pt-left h3 { font-size: 28px; font-weight: 700; letter-spacing: -.025em;
  margin-bottom: 8px; }
.pt-left p { font-size: 13px; color: var(--fg2); font-weight: 300; }
.pt-btn { font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--fg); background: none; border: .5px solid var(--rule2);
  padding: 16px 36px; cursor: pointer; font-family: inherit;
  transition: all .25s; flex-shrink: 0; display: inline-block;
  text-decoration: none; }
.pt-btn:hover { background: var(--fg); color: var(--bg); }

/* ── Related cards ── */
.led { padding: 72px 80px; border-top: .5px solid var(--rule); }
.led-label { font-family: "Courier New", monospace; font-size: 10px;
  letter-spacing: .18em; text-transform: uppercase; color: var(--fg3);
  margin-bottom: 32px; display: block; }
.led-grid { display: grid; grid-template-columns: repeat(3, 1fr);
  border: .5px solid var(--rule2); }
.led-card { padding: 28px 24px; border-right: .5px solid var(--rule);
  text-decoration: none; color: inherit; display: block;
  transition: background .2s; }
.led-card:last-child { border-right: none; }
.led-card:hover { background: var(--bg2); }
.led-arrow { font-size: 13px; color: var(--fg3); margin-bottom: 14px;
  display: block; }
.led-title { font-size: 15px; font-weight: 700; margin-bottom: 8px;
  letter-spacing: -.015em; }
.led-desc { font-size: 12px; color: var(--fg2); line-height: 1.65;
  font-weight: 300; }

/* ── Responsive ── */
@media (max-width: 960px) {
  .hero { padding: 60px 28px 50px; }
  .section, .paper-trigger, .led { padding: 48px 28px; }
  .fig-bleed { margin: 28px -28px; padding: 36px 28px; }
  .method-grid { grid-template-columns: 1fr; }
  .method-card { border-right: none !important;
    border-bottom: .5px solid var(--rule); }
  .method-card:last-child { border-bottom: none; }
  .led-grid { grid-template-columns: 1fr; }
  .led-card { border-right: none;
    border-bottom: .5px solid var(--rule); }
  .led-card:last-child { border-bottom: none; }
  .paper-trigger { flex-direction: column; gap: 24px;
    align-items: flex-start; }
  .demo-section { padding: 48px 28px; }
  .demo-grid { grid-template-columns: 1fr; }
  .demo-pane { border-right: none; border-bottom: .5px solid var(--rule); }
  .demo-pane:last-child { border-bottom: none; }
  .topbar { padding: 0 20px; }
  .tb-l { gap: 16px; }
  .tb-meta { display: none; }
}