/* Decision Observatory — design system
   Ink/navy instrument aesthetic · amber probability accent
   Serif: Spectral · Sans: IBM Plex Sans · Mono: IBM Plex Mono */

:root {
  --ink: #0A1421;
  --ink-2: #0F1B2D;
  --ink-3: #0C1727;
  --line: #22344C;
  --line-soft: #1A2A40;
  --text-hi: #EDF2F8;
  --text: #C6D3E2;
  --muted: #8FA3BC;
  --faint: #5F7796;
  --amber: #C89B4A;
  --amber-hi: #E3B461;
  --amber-ink: #231A08;
  --green: #8FC98F;
  --green-bg: #1C2E1F;
  --red: #D98A7A;
  --serif: 'Spectral', Georgia, serif;
  --sans: 'IBM Plex Sans', -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --max: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--text-hi); text-decoration: none; }
a:hover { color: var(--amber-hi); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ── Nav ── */
.nav {
  border-bottom: 1px solid var(--line-soft);
  background: rgba(10, 20, 33, 0.92);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 50;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-name {
  font-family: var(--serif); font-size: 17px; font-weight: 500;
  color: var(--text-hi); letter-spacing: 0.01em;
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { font-size: 13.5px; color: var(--muted); }
.nav-links a:hover { color: var(--text-hi); }
.nav-links a.active { color: var(--amber-hi); }
.nav-cta {
  border: 1px solid #3A5578; color: var(--text-hi);
  padding: 8px 16px; border-radius: 6px; font-size: 13.5px;
  transition: border-color 0.2s, color 0.2s;
}
.nav-cta:hover { border-color: var(--amber); color: var(--amber-hi); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--text); border-radius: 6px; padding: 6px 10px; font-size: 14px; cursor: pointer; }

/* ── Type ── */
h1, h2, h3 { font-family: var(--serif); color: var(--text-hi); font-weight: 500; line-height: 1.25; }
h1 { font-size: clamp(30px, 4.6vw, 44px); letter-spacing: -0.01em; }
h2 { font-size: clamp(23px, 3vw, 30px); }
h3 { font-size: 19px; }
.eyebrow {
  font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--faint); margin-bottom: 14px; font-weight: 500;
}
.lede { font-size: 17.5px; color: var(--muted); max-width: 640px; line-height: 1.7; }
.q { font-family: var(--serif); font-style: italic; color: var(--muted); font-size: clamp(17px, 2.2vw, 21px); }
.figure { font-family: var(--mono); color: var(--amber-hi); }
.sample-tag {
  display: inline-block; font-size: 10.5px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--faint);
  border: 1px solid var(--line); border-radius: 3px; padding: 2px 7px;
}

/* ── Layout blocks ── */
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--line-soft); }
.hero { padding: 88px 0 56px; text-align: center; }
.hero .q { margin-bottom: 14px; }
.hero p.sub { margin-top: 16px; color: var(--muted); font-size: 16px; max-width: 560px; margin-left: auto; margin-right: auto; }

.btn {
  display: inline-block; border-radius: 6px; font-size: 14px;
  padding: 11px 22px; border: 1px solid transparent; cursor: pointer;
  font-family: var(--sans); transition: background 0.2s, border-color 0.2s;
}
.btn-amber { background: var(--amber); color: var(--amber-ink); font-weight: 500; }
.btn-amber:hover { background: var(--amber-hi); color: var(--amber-ink); }
.btn-ghost { border-color: #3A5578; color: var(--text-hi); background: transparent; }
.btn-ghost:hover { border-color: var(--amber); color: var(--amber-hi); }
.btn-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 26px; }

.card {
  background: var(--ink-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 22px;
}
.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* ── Run cards ── */
.run-card { display: block; transition: border-color 0.2s; }
.run-card:hover { border-color: #3A5578; }
.run-meta { font-size: 11.5px; color: var(--faint); margin-bottom: 8px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.run-title { font-family: var(--serif); font-size: 16.5px; color: var(--text-hi); line-height: 1.45; }
.run-stat { font-size: 12.5px; color: var(--muted); margin-top: 10px; }

.badge {
  font-size: 11px; padding: 3px 9px; border-radius: 10px;
  background: var(--green-bg); color: var(--green);
}

/* ── Track record strip ── */
.strip {
  background: var(--ink-3); border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft); padding: 18px 0;
}
.strip-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.strip p { font-size: 13.5px; color: var(--muted); }
.strip a { font-size: 13.5px; border-bottom: 1px solid #3A5578; padding-bottom: 1px; }

/* ── Tables ── */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th {
  text-align: left; font-size: 11.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--faint); font-weight: 500;
  padding: 10px 14px; border-bottom: 1px solid var(--line);
}
td { padding: 13px 14px; border-bottom: 1px solid var(--line-soft); color: var(--text); vertical-align: top; }
tr:last-child td { border-bottom: none; }
.table-card { background: var(--ink-2); border: 1px solid var(--line); border-radius: 10px; overflow-x: auto; }

.grade { font-family: var(--mono); font-size: 12.5px; }
.grade.hit { color: var(--green); }
.grade.miss { color: var(--red); }
.grade.open { color: var(--faint); }

/* ── Pricing ── */
.tiers { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; align-items: start; }
.tier { background: var(--ink-2); border: 1px solid var(--line); border-radius: 12px; padding: 28px 26px; }
.tier.featured { border-color: var(--amber); }
.tier h3 { margin-bottom: 4px; }
.tier .price { font-family: var(--mono); font-size: 30px; color: var(--text-hi); margin: 14px 0 2px; }
.tier .price span { font-size: 14px; color: var(--faint); font-family: var(--sans); }
.tier .per { font-size: 12.5px; color: var(--faint); margin-bottom: 18px; }
.tier ul { list-style: none; margin: 18px 0 24px; }
.tier li { padding: 7px 0; font-size: 14px; color: var(--text); border-bottom: 1px solid var(--line-soft); }
.tier li:last-child { border-bottom: none; }
.tier li::before { content: '— '; color: var(--amber); }
.founding {
  border: 1px solid var(--amber); border-radius: 12px; background: rgba(200, 155, 74, 0.06);
  padding: 24px 26px; margin-top: 28px;
}

/* ── Assumptions / definition lists ── */
.kv { display: grid; grid-template-columns: 220px 1fr; gap: 0; font-size: 14px; }
.kv dt { color: var(--faint); padding: 10px 14px; border-bottom: 1px solid var(--line-soft); font-family: var(--mono); font-size: 12.5px; }
.kv dd { padding: 10px 14px; border-bottom: 1px solid var(--line-soft); }
.kv dt:last-of-type, .kv dd:last-of-type { border-bottom: none; }

/* ── Footer ── */
footer { border-top: 1px solid var(--line-soft); padding: 42px 0 56px; margin-top: 40px; }
.foot-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot-col { font-size: 13px; color: var(--faint); }
.foot-col a { display: block; color: var(--muted); font-size: 13px; padding: 3px 0; }
.foot-col a:hover { color: var(--amber-hi); }
.foot-note { margin-top: 28px; font-size: 12.5px; color: var(--faint); }

/* ── Prose pages ── */
.prose { max-width: 720px; }
.prose p { margin: 16px 0; color: var(--text); }
.prose h2 { margin-top: 48px; margin-bottom: 8px; }
.prose h3 { margin-top: 32px; margin-bottom: 6px; }
.prose .q { display: block; margin: 22px 0; }

/* ── Responsive ── */
@media (max-width: 820px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--ink-3); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: flex-start; padding: 16px 24px; gap: 14px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .kv { grid-template-columns: 1fr; }
  .kv dt { border-bottom: none; padding-bottom: 0; }
  section { padding: 52px 0; }
}