/* Light, institutional theme is the default. Dark is opt-in via the nav toggle. */
:root {
  --bg: #ffffff;
  --bg-alt: #f6f8fa;
  --fg: #33475b;
  --heading: #0f2a44;
  --muted: #5b6b7c;
  --card: #ffffff;
  --border: #dfe4ea;
  --grid: #eef1f4;
  --accent: #2b5d8c;
  --accent-ink: #ffffff;
  --accent-soft: #e8eff6;
  --up: #1b7a4a;
  --down: #b23a2e;
  --warn: #b7791f;
  --band: rgba(43, 93, 140, 0.45);
  --median: #6b4fa0;
  --price: #0f2a44;
  --v1: #9aa5b1;
  --v2: #2b5d8c;
  --v2b: #2f855a;
  --neutral: #a3adb8;
  --shadow: 0 1px 2px rgba(15, 42, 68, 0.04), 0 1px 3px rgba(15, 42, 68, 0.06);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0e1620;
  --bg-alt: #121c27;
  --fg: #c9d3dd;
  --heading: #eef3f8;
  --muted: #93a2b2;
  --card: #141f2b;
  --border: #263445;
  --grid: #1c2937;
  --accent: #7fa8d4;
  --accent-ink: #0e1620;
  --accent-soft: #1b2b3d;
  --up: #4cc38a;
  --down: #ff7b6b;
  --warn: #e0a84a;
  --band: rgba(127, 168, 212, 0.55);
  --median: #b99cf0;
  --price: #e6edf3;
  --v1: #6f7d8c;
  --v2: #7fa8d4;
  --v2b: #68c08f;
  --neutral: #5d6b7a;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { color: var(--heading); letter-spacing: -0.015em; }
h1 { margin: 0 0 18px; font-size: clamp(1.75rem, 3.6vw, 2.6rem); line-height: 1.18; font-weight: 650; max-width: 880px; }
h2 { margin: 0 0 8px; font-size: 1.55rem; line-height: 1.3; font-weight: 650; }
h3 { margin: 36px 0 8px; font-size: 1.1rem; font-weight: 600; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
code { font: 0.88em ui-monospace, SFMono-Regular, Consolas, monospace; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 4px; padding: 0 4px; }
.muted { color: var(--muted); }
.small { font-size: 0.9rem; }
b, strong { color: var(--heading); font-weight: 600; }

/* Nav */
.topnav {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  -webkit-backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--heading); text-decoration: none; font-weight: 650; font-size: 1.02rem; letter-spacing: -0.01em; }
.mono {
  display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 6px;
  background: var(--heading); color: var(--bg); font-weight: 700; font-size: 0.95rem; line-height: 1;
}
.nav-links { display: flex; gap: 22px; margin-left: auto; }
.nav-links a { color: var(--heading); text-decoration: none; font-size: 0.92rem; font-weight: 500; opacity: 0.85; }
.nav-links a:hover { color: var(--accent); opacity: 1; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--card); color: var(--muted); cursor: pointer;
}
.theme-toggle:hover { color: var(--heading); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 6px;
  font: 500 0.95rem/1.2 inherit; font-family: inherit; text-decoration: none; border: 1px solid transparent; white-space: nowrap;
}
.btn-sm { padding: 7px 14px; font-size: 0.9rem; }
.btn-primary { background: var(--heading); color: var(--bg); }
.btn-primary:hover { background: var(--accent); color: var(--accent-ink); }
.btn-ghost { border-color: var(--border); color: var(--heading); background: var(--card); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.gh { flex: none; }

/* Hero */
.hero { padding: 72px 0 56px; border-bottom: 1px solid var(--border); background: linear-gradient(180deg, var(--bg-alt), var(--bg)); }
.eyebrow { margin: 0 0 14px; color: var(--accent); font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.lede { max-width: 760px; margin: 0 0 28px; font-size: 1.12rem; color: var(--fg); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px; margin: 0; padding: 5px 12px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--card); color: var(--muted); font-size: 0.85rem;
}
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); flex: none; }

/* Sections */
main section { padding: 56px 0 8px; }
main section + section { border-top: 1px solid var(--border); margin-top: 32px; }
.section-head { margin-bottom: 24px; }
.intro { max-width: 800px; margin: 0; color: var(--fg); }
.kicker { margin: -2px 0 10px; color: var(--accent); font-size: 0.82rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }
.verdict { font-size: 1rem; margin: 20px 0 8px; }

.feature {
  background: var(--bg-alt); border: 1px solid var(--border) !important; border-radius: 10px;
  padding: 40px 32px 32px !important; border-left: 4px solid var(--accent) !important;
}
.ledger-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 14px 16px; }
.stat .n { display: block; font-size: 1.7rem; font-weight: 650; color: var(--heading); font-variant-numeric: tabular-nums; line-height: 1.2; }
.stat .l { color: var(--muted); font-size: 0.85rem; }

/* Metric cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 20px 22px; box-shadow: var(--shadow); }
.card .label { color: var(--muted); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }
.card .value { margin: 8px 0 6px; color: var(--heading); font-size: 1.9rem; line-height: 1.15; font-weight: 650; font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.card .sub { color: var(--muted); font-size: 0.88rem; line-height: 1.45; }
#window { margin-top: 14px; }
.neg { color: var(--down); }
.pos { color: var(--up); }

/* Panels and charts */
.panel { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 18px 18px 14px; box-shadow: var(--shadow); margin-top: 8px; }
.controls { display: flex; flex-wrap: wrap; gap: 18px; margin: 0 0 12px; font-size: 0.92rem; color: var(--heading); font-weight: 500; }
select { font: inherit; font-weight: 400; margin-left: 6px; padding: 6px 10px; background: var(--card); color: var(--heading); border: 1px solid var(--border); border-radius: 6px; }

.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 0.85rem; color: var(--muted); margin-bottom: 10px; }
.sw { display: inline-block; width: 18px; height: 3px; vertical-align: middle; margin-right: 6px; border-radius: 2px; }
.sw-price { background: var(--price); }
.sw-band { background: var(--band); height: 8px; }
.sw-median { background: var(--median); }
.sw-v1 { background: var(--v1); }
.sw-v2 { background: var(--v2); }
.sw-v2b { background: var(--v2b); }
.mk { display: inline-block; width: 9px; height: 9px; margin-right: 6px; vertical-align: middle; border-radius: 50%; }
.mk-buy { background: var(--up); }
.mk-sell { background: var(--down); }
.mk-block { background: var(--warn); }

.chart { width: 100%; height: 440px; overflow: hidden; background: var(--card); }
.chart.short { height: 280px; }
.chart.mini { height: 170px; }
.caption { margin: 10px 0 0; color: var(--muted); font-size: 0.88rem; }
.hover { min-height: 2.8em; margin-top: 10px; }

.posts { width: 100%; height: 96px; display: block; border: 1px solid var(--border); border-radius: 8px; background: var(--card); }
.posts circle { cursor: pointer; }
.post-detail { min-height: 3em; margin-top: 8px; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; background: var(--card); margin-top: 16px; }
.table-wrap.tall { max-height: 460px; overflow-y: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: var(--bg-alt); }
th { position: sticky; top: 0; background: var(--bg-alt); color: var(--heading); font-weight: 600; font-size: 0.8rem; letter-spacing: 0.02em; }
td.num, th.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
#ledger td:nth-child(7) { min-width: 300px; }
#ledger td:nth-child(2), #ledger td:nth-child(8) { white-space: nowrap; }
#carry-results td:first-child, #carry-spec td:first-child, #evals td:nth-child(2) { white-space: nowrap; }
#decisions td:nth-child(1), #decisions td:nth-child(5) { white-space: nowrap; }
td code { background: none; border: 0; padding: 0; color: var(--muted); }
.tag { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; border: 1px solid currentColor; white-space: nowrap; }
.tag.kept { color: var(--up); }
.tag.killed { color: var(--down); }
.tag.baseline, .tag.preregistered, .tag.in_sample, .tag.design_choice { color: var(--muted); }

.how { padding-left: 22px; }
.how li { margin-bottom: 12px; max-width: 820px; padding-left: 4px; }
.how li::marker { color: var(--accent); font-weight: 600; }

.tip {
  position: fixed; z-index: 30; max-width: min(360px, calc(100vw - 32px)); padding: 10px 12px; border-radius: 6px;
  background: var(--card); color: var(--fg); border: 1px solid var(--border); box-shadow: 0 6px 20px rgba(15, 42, 68, 0.16);
  font-size: 0.85rem; pointer-events: none;
}

.footer { margin-top: 80px; padding: 36px 0 48px; border-top: 1px solid var(--border); background: var(--bg-alt); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; }
.footer p { margin: 8px 0 0; }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-actions { margin-left: auto; }
}

@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .hero { padding: 44px 0 36px; }
  .lede { font-size: 1.02rem; }
  h2 { font-size: 1.3rem; }
  main section { padding-top: 40px; }
  main section + section { margin-top: 24px; }
  .feature { padding: 28px 16px 20px !important; border-radius: 8px; }
  .cards { grid-template-columns: 1fr 1fr; gap: 10px; }
  .card { padding: 14px; }
  .card .value { font-size: 1.35rem; }
  .card .sub { font-size: 0.8rem; }
  .panel { padding: 12px 10px 10px; }
  .chart { height: 320px; }
  .chart.short { height: 220px; }
  .chart.mini { height: 150px; }
  th, td { padding: 8px 10px; }
  .footer-inner .btn span { white-space: normal; }
}

/* pipeline */
.pipeline { list-style: none; padding: 0; margin: 0; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: var(--card); box-shadow: var(--shadow); }
.pl-row { display: grid; grid-template-columns: 44px 170px 1fr 230px; gap: 16px; align-items: start; padding: 16px 20px; border-top: 1px solid var(--border); position: relative; }
.pl-row:first-child { border-top: 0; }
.pl-num { width: 28px; height: 28px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; display: grid; place-items: center; font-variant-numeric: tabular-nums; }
.pl-name { color: var(--heading); font-weight: 650; line-height: 1.3; padding-top: 3px; }
.pl-tag { margin-top: 4px; color: var(--muted); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }
.pl-what { line-height: 1.55; padding-top: 3px; }
.pl-code { padding-top: 3px; }
.pl-code { display: flex; flex-wrap: wrap; gap: 6px; }
.pl-code code { font-size: 0.78rem; color: var(--muted); background: var(--bg-alt); border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; white-space: nowrap; }
.pl-row:nth-child(3) { background: var(--accent-soft); }
.pl-row:nth-child(3) .pl-num { background: var(--accent); color: var(--accent-ink); }
.pl-note { margin-top: 12px; }
@media (max-width: 760px) {
  .pl-row { grid-template-columns: 36px 1fr; gap: 6px 12px; padding: 14px 14px; }
  .pl-what, .pl-code { grid-column: 2; }
}