:root {
  color-scheme: dark;
  --bg: #071016;
  --panel: #0d1b24;
  --panel-2: #122632;
  --text: #edf7fb;
  --muted: #9bb0ba;
  --line: rgba(255,255,255,0.12);
  --accent: #67d7ff;
  --accent-2: #f4c76b;
  --good: #8ef0b8;
  --warn: #ff9d7a;
  --shadow: 0 20px 70px rgba(0,0,0,0.34);
  --radius: 20px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(103,215,255,0.16), transparent 35rem),
    radial-gradient(circle at 85% 5%, rgba(244,199,107,0.13), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
}

button, input { font: inherit; }
button {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border-radius: 999px;
  padding: 0.68rem 1rem;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}
button:hover { transform: translateY(-1px); border-color: rgba(103,215,255,0.55); background: rgba(103,215,255,0.12); }
button.active, .primary-action { background: var(--accent); color: #00131c; border-color: transparent; font-weight: 700; }
button.primary-action:hover { background: #8de2ff; }

.hero {
  padding: 4rem 1.4rem 2.1rem;
  border-bottom: 1px solid var(--line);
}
.hero__inner {
  max-width: 1220px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(310px, 0.6fr);
  gap: 2rem;
  align-items: center;
}
.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  margin: 0 0 0.5rem;
}
h1 {
  font-size: clamp(3.2rem, 9vw, 7.4rem);
  line-height: 0.86;
  margin: 0;
  letter-spacing: -0.07em;
}
.subtitle {
  font-size: clamp(1.25rem, 3vw, 2.2rem);
  margin: 0.7rem 0 1rem;
  color: var(--accent-2);
}
.lede { max-width: 820px; font-size: 1.12rem; color: #cfe0e6; }
.claim-card, .tile, .narrative-card, .flow-card, .control-card, .result-card, .pipeline-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.035));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}
.claim-card { padding: 1.4rem; }
.claim-card strong { display: block; font-size: 1.55rem; line-height: 1.1; margin: 0.2rem 0 0.7rem; }
.claim-card__label, .badge { display: inline-flex; align-items: center; gap: 0.3rem; color: #071016; background: var(--accent-2); border-radius: 999px; padding: 0.15rem 0.55rem; font-size: 0.75rem; font-weight: 800; }
.claim-card p { color: var(--muted); }
.tabs {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding: 0.75rem max(1rem, calc((100vw - 1220px) / 2));
  background: rgba(7,16,22,0.86);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.tab { white-space: nowrap; }
main { max-width: 1220px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
.panel { display: none; animation: fade 180ms ease; }
.panel.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.section-head { margin: 1.8rem 0 1.3rem; max-width: 960px; }
h2 { font-size: clamp(1.8rem, 4vw, 3.2rem); line-height: 1.02; letter-spacing: -0.04em; margin: 0 0 0.8rem; }
h3 { margin: 0 0 0.75rem; font-size: 1.16rem; }
p { color: #c9d9df; }
.grid { display: grid; gap: 1rem; }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.tile { padding: 1.2rem; min-height: 180px; }
.tile h3 { margin-top: 0.75rem; }
.tile p { margin-bottom: 0; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1rem; margin-top: 1rem; }
.narrative-card, .flow-card, .control-card, .result-card, .pipeline-card { padding: 1.25rem; }
.wide-card { margin-top: 1rem; }
.argument-list { padding-left: 1.25rem; color: #dbe9ed; }
.argument-list li { margin: 0.45rem 0; }
.api-shadow { display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap; margin: 1rem 0; }
.shadow-box { border: 1px solid rgba(103,215,255,0.35); border-radius: 16px; padding: 1rem; min-width: 150px; background: rgba(103,215,255,0.06); text-align: center; }
.shadow-box small { color: var(--muted); }
.arrow { color: var(--accent-2); font-size: 2rem; }
.note { font-size: 0.93rem; color: var(--muted); }
.timeline { position: relative; display: grid; gap: 0.8rem; margin: 1.2rem 0; }
.timeline-item { display: grid; grid-template-columns: 100px 1fr; gap: 1rem; align-items: stretch; }
.timeline-year { color: #071016; background: var(--accent); border-radius: 14px; display: flex; align-items: center; justify-content: center; font-weight: 900; }
.timeline-body { padding: 1rem; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,0.045); }
.timeline-body h3 { margin: 0; }
.timeline-body p { margin: 0.35rem 0 0; }
.source-strip { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1rem; }
.source-strip a, .source-pill { border: 1px solid var(--line); color: var(--accent); text-decoration: none; border-radius: 999px; padding: 0.4rem 0.65rem; font-size: 0.86rem; background: rgba(255,255,255,0.04); }
.mini-code { background: rgba(0,0,0,0.3); border: 1px solid var(--line); border-radius: 14px; overflow: auto; }
.mini-code pre { margin: 0; padding: 1rem; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; font-size: 0.9rem; }
.mini-code.large { margin-top: 0.8rem; max-height: 420px; }
.demo-grid { display: grid; grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr); gap: 1rem; align-items: stretch; margin: 1rem 0; }
.control-card label, .resolver-grid label, .rowid-controls label { display: grid; gap: 0.35rem; color: #d7e7ed; font-size: 0.9rem; margin: 0.7rem 0; }
input { width: 100%; border: 1px solid var(--line); border-radius: 12px; color: var(--text); background: rgba(0,0,0,0.3); padding: 0.7rem; }
input[type="range"] { accent-color: var(--accent); }
.button-row { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.8rem; }
.metric-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.8rem; margin-bottom: 1rem; }
.metric-grid > div { border: 1px solid var(--line); border-radius: 16px; padding: 1rem; background: rgba(0,0,0,0.18); }
.metric { display: block; font-size: clamp(1.5rem, 4vw, 2.45rem); font-weight: 900; color: var(--accent-2); line-height: 1; }
.metric-grid small { color: var(--muted); }
.bar-row { display: grid; grid-template-columns: 135px 1fr; gap: 0.8rem; align-items: center; margin: 0.65rem 0; color: #dbe9ed; }
.bar-track { height: 16px; border-radius: 999px; background: rgba(255,255,255,0.08); overflow: hidden; }
.bar-fill { height: 100%; width: 40%; background: var(--warn); border-radius: inherit; transition: width 180ms ease; }
.bar-fill.alt { background: var(--good); }
.cursor-demo { min-height: 260px; border: 1px solid var(--line); border-radius: 16px; padding: 1rem; display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.5rem; align-items: center; background: rgba(0,0,0,0.18); }
.cursor-col { border: 1px solid var(--line); min-height: 210px; border-radius: 14px; padding: 0.6rem; position: relative; }
.cursor-col h4 { margin: 0 0 0.6rem; font-size: 0.82rem; color: var(--muted); }
.row-dot { width: 100%; height: 8px; border-radius: 999px; background: rgba(103,215,255,0.22); margin: 5px 0; }
.row-dot.active { background: var(--accent); box-shadow: 0 0 18px rgba(103,215,255,0.55); }
.pipeline-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.pipeline { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin: 1rem 0; }
.node, .edge { border-radius: 14px; border: 1px solid var(--line); padding: 0.85rem; min-height: 54px; display: flex; align-items: center; justify-content: center; text-align: center; }
.node { background: rgba(103,215,255,0.08); min-width: 120px; }
.node.wide { min-width: 180px; }
.edge { background: rgba(244,199,107,0.1); color: var(--accent-2); }
.pipeline-card.highlight-crossings .crossing, .pipeline-card.highlight-crossings .bulk { outline: 2px solid var(--accent-2); }
.pipeline-card.highlight-engine .client, .pipeline-card.highlight-engine .target.wide { outline: 2px solid var(--accent); }
.pipeline-card.highlight-failure .crossing, .pipeline-card.highlight-failure .client { box-shadow: 0 0 0 2px var(--warn); }
.compact-list { color: #dbe9ed; padding-left: 1.1rem; }
.sticky-controls { position: sticky; top: 66px; z-index: 10; background: rgba(7,16,22,0.75); padding: 0.5rem; border-radius: 999px; backdrop-filter: blur(10px); border: 1px solid var(--line); width: fit-content; }
.artifact-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.artifact-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem; background: rgba(255,255,255,0.045); }
.artifact-card h3 { margin-top: 0.7rem; }
.artifact-meta { color: var(--muted); font-size: 0.88rem; }
.artifact-card ul { padding-left: 1.1rem; color: #dbe9ed; }
.resolver-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 0.8rem; }
.dispatch-demo { display: grid; gap: 0.5rem; }
.dispatch-step { border: 1px solid var(--line); border-radius: 14px; padding: 0.8rem; color: var(--muted); background: rgba(0,0,0,0.18); }
.dispatch-step.active { color: #06131a; background: var(--accent-2); font-weight: 900; }
.rowid-controls { display: flex; gap: 1rem; flex-wrap: wrap; align-items: end; }
.extent-map { display: flex; width: 100%; height: 70px; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; margin: 1rem 0; background: rgba(0,0,0,0.2); }
.extent { height: 100%; display: flex; align-items: center; justify-content: center; border-right: 1px solid rgba(0,0,0,0.24); min-width: 20px; color: #00131c; font-weight: 900; font-size: 0.72rem; }
.extent:nth-child(3n+1) { background: #67d7ff; }
.extent:nth-child(3n+2) { background: #8ef0b8; }
.extent:nth-child(3n+3) { background: #f4c76b; }
.copybook-demo { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0.8rem; align-items: center; }
.copybook-demo pre { background: rgba(0,0,0,0.3); border: 1px solid var(--line); border-radius: 14px; padding: 1rem; overflow: auto; }
.evidence-filters { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.evidence-table { display: grid; gap: 0.75rem; }
.evidence-row { display: grid; grid-template-columns: 120px 1fr 1.2fr; gap: 1rem; border: 1px solid var(--line); border-radius: 16px; padding: 1rem; background: rgba(255,255,255,0.04); }
.evidence-row strong { display: block; }
.evidence-kind { text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.74rem; font-weight: 900; color: var(--accent-2); }
.evidence-row a { color: var(--accent); }
footer { max-width: 1220px; margin: 0 auto; padding: 2rem 1rem 3rem; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); }

@media (max-width: 920px) {
  .hero__inner, .split, .demo-grid, .pipeline-grid, .artifact-grid { grid-template-columns: 1fr; }
  .grid.three, .grid.four { grid-template-columns: 1fr; }
  .copybook-demo { grid-template-columns: 1fr; }
  .evidence-row { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: 1fr; }
  .cursor-demo { grid-template-columns: 1fr; }
  .cursor-col { min-height: 100px; }
  footer { flex-direction: column; }
}

@media print {
  body { background: white; color: #111; }
  .tabs, button, .sticky-controls { display: none !important; }
  .panel { display: block !important; page-break-inside: avoid; }
  .claim-card, .tile, .narrative-card, .flow-card, .control-card, .result-card, .pipeline-card, .artifact-card, .evidence-row { box-shadow: none; border-color: #ccc; background: white; }
  p, .note, .artifact-meta, .compact-list { color: #222; }
}


/* Cloudflare second-pass enhancements */
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f7fbff;
  --panel: #ffffff;
  --panel-2: #eef5fb;
  --text: #10212b;
  --muted: #506572;
  --line: rgba(12, 42, 58, 0.16);
  --accent: #006d91;
  --accent-2: #946300;
  --good: #04784f;
  --warn: #b5482f;
  --shadow: 0 18px 50px rgba(6, 30, 45, 0.12);
}
.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  transform: translateY(-160%);
  z-index: 99;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  background: var(--accent);
  color: #00131c;
  font-weight: 800;
}
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--accent-2); outline-offset: 3px; }
.graph-card svg {
  width: 100%;
  min-height: 320px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,0.035);
}
.graph-node { stroke: var(--line); stroke-width: 1.5; }
.graph-label { fill: var(--text); font: 600 13px ui-sans-serif, system-ui; }
.graph-edge { stroke: rgba(255,255,255,0.25); stroke-width: 2; }
:root[data-theme="light"] .graph-edge { stroke: rgba(12,42,58,0.25); }
.deploy-tile code, .file-grid code { color: var(--accent-2); }
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}
.file-grid div {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.05);
  padding: 1rem;
  display: grid;
  gap: .35rem;
}
.file-grid span { color: var(--muted); font-size: .92rem; }
.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 100;
  max-width: min(420px, calc(100vw - 2rem));
  padding: .8rem 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: 0.001ms !important; }
}