:root {
  --bg: #0f1115;
  --panel: #161a22;
  --panel-2: #1c2330;
  --ink: #e8ecf2;
  --ink-dim: #a3acbd;
  --ink-faint: #6b7488;
  --accent: #7cc4ff;
  --accent-2: #b6f0c2;
  --rule: #232a38;
  --maxw: 980px;
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Header */
header.container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  padding-bottom: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand .mark { font-size: 22px; }
.brand .wordmark { font-size: 18px; }
/* Hero */
.hero {
  padding-top: 60px;
  padding-bottom: 80px;
}
.eyebrow {
  color: var(--ink-faint);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 18px;
}
.hero h1 {
  font-size: 44px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  max-width: 22ch;
}
.lede {
  font-size: 19px;
  color: var(--ink-dim);
  max-width: 60ch;
  margin: 0;
}

/* Sections */
section {
  padding-top: 96px;
  padding-bottom: 96px;
}
section h2 {
  font-size: 28px;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}
section h3 {
  font-size: 17px;
  margin: 0 0 8px;
  color: var(--ink);
}
section p {
  color: var(--ink-dim);
  margin: 0 0 12px;
  max-width: 65ch;
}
.section-lede {
  font-size: 17px;
  color: var(--ink-dim);
  margin: 0 0 12px;
  max-width: 60ch;
}

/* Grids */
.grid {
  display: grid;
  gap: 24px;
}
.grid.two { grid-template-columns: 1fr 1fr; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 720px) {
  .grid.two, .grid.three, .grid.four { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  .hero { padding-top: 32px; padding-bottom: 48px; }
}

.how-detail { margin-top: 36px; }

/* Diagram */
.diagram {
  margin: 24px 0 40px;
  padding: 0;
}
.diagram svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 820px;
}
.d-panel { fill: var(--panel); stroke: var(--rule); stroke-width: 1.5; }
.d-gene  { fill: var(--panel-2); stroke: var(--accent); stroke-width: 1.5; }
.d-rule  { stroke: var(--rule); stroke-width: 1; }
.d-line {
  stroke: var(--accent);
  stroke-width: 1.6;
  fill: none;
  stroke-dasharray: 2 8;
  stroke-linecap: round;
  animation: d-flow 1.6s linear infinite;
}
@keyframes d-flow {
  to { stroke-dashoffset: -10; }
}
@media (prefers-reduced-motion: reduce) {
  .d-line { animation: none; }
}
.d-label        { fill: var(--ink); font: 500 14px var(--font); }
.d-label-gene   { fill: var(--ink); font: 600 17px var(--font); }
.d-label-sub    { fill: var(--accent-2); font: 400 12px var(--font); }
.d-label-faint  { fill: var(--ink-faint); font: 400 11px var(--font); font-style: italic; }
.d-label-tiny   { fill: var(--ink-faint); font: 400 11px var(--font); }
.d-col-label    { fill: var(--ink-faint); font: 600 10px var(--font); letter-spacing: 0.12em; }

/* Reasons list (vs MCPs) */
.reasons {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  max-width: 65ch;
}
.reasons li {
  color: var(--ink-dim);
  padding: 14px 0;
  border-top: 1px solid var(--rule);
}
.reasons li:first-child { border-top: 0; padding-top: 4px; }
.reasons strong { color: var(--ink); font-weight: 600; display: block; margin-bottom: 4px; }
code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
  background: var(--panel);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--ink);
}

/* Cards */
.card {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
}
.card p { margin: 0; }

/* Status */
.status p { max-width: 65ch; }

/* Footer */
footer.container {
  padding-top: 40px;
  padding-bottom: 60px;
  color: var(--ink-faint);
  font-size: 14px;
  border-top: 1px solid var(--rule);
  margin-top: 40px;
}
footer a { color: var(--ink-dim); }