:root {
  --bg: #0a0f16;
  --bg-raise: #0e1520;
  --panel: #101a26;
  --line: rgba(140, 170, 195, 0.16);
  --line-strong: rgba(140, 170, 195, 0.35);
  --ink: #e9f1f6;
  --ink-soft: #93a6b4;
  --accent: #2ee6a8;
  --accent-2: #4cc9f0;
  --accent-3: #8b7bff;
  --gradient: linear-gradient(92deg, var(--accent), var(--accent-2) 55%, var(--accent-3));
  --warn-bg: rgba(255, 196, 87, 0.14);
  --warn-ink: #ffc457;
  --stale-bg: rgba(255, 122, 89, 0.16);
  --stale-ink: #ff8f6b;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --display: "Space Grotesk", -apple-system, "Segoe UI", sans-serif;
  --body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(60rem 30rem at 70% -12rem, rgba(46, 230, 168, 0.07), transparent 60%),
    radial-gradient(50rem 26rem at 10% -10rem, rgba(139, 123, 255, 0.06), transparent 60%),
    var(--bg);
  color: var(--ink);
  font: 16px/1.6 var(--body);
}

.wrap { max-width: 64rem; margin: 0 auto; padding: 0 1.25rem; }

h1, h2, h3 { font-family: var(--display); line-height: 1.15; letter-spacing: -0.01em; }
h1 { font-size: 2rem; margin: 1.8rem 0 0.8rem; }
h2 { font-size: 1.3rem; margin: 2.4rem 0 0.6rem; }
main { padding-bottom: 3rem; }
main a { color: var(--accent-2); text-decoration-color: rgba(76, 201, 240, 0.4); }
main a:hover { color: var(--accent); }
section { margin: 1.7rem 0; }
strong { color: var(--ink); }
code { font-family: var(--mono); font-size: 0.88em; background: var(--panel); border: 1px solid var(--line); padding: 0.05em 0.35em; border-radius: 4px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(10, 15, 22, 0.85);
  position: relative;
}
.site-header::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--gradient);
}
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem 1rem; padding-top: 0.55rem; padding-bottom: 0.55rem; }
.wordmark {
  font-family: var(--display); font-weight: 700; font-size: 1.3rem; letter-spacing: 0.02em;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-decoration: none;
}
.wordmark-sub {
  font-family: var(--mono); font-weight: 400; font-size: 0.72rem;
  letter-spacing: 0.02em; color: var(--ink-soft);
}
.site-header nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; margin-left: auto; }
.site-header nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.87rem; font-weight: 500; padding: 0.15rem 0; }
.site-header nav a[aria-current="page"] { color: var(--ink); border-bottom: 2px solid var(--accent); }
.site-header nav a:hover { color: var(--ink); }
.ticker {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-family: var(--mono); font-size: 0.78rem; color: var(--accent);
  border: 1px solid rgba(46, 230, 168, 0.35); border-radius: 999px;
  padding: 0.22rem 0.7rem; background: rgba(46, 230, 168, 0.07);
  white-space: nowrap;
}
.ticker-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(46, 230, 168, 0.5); }
  50% { opacity: 0.55; box-shadow: 0 0 0 5px rgba(46, 230, 168, 0); }
}
.ticker-age { font-size: 0.72rem; color: var(--ink-soft); margin-left: 0.1rem; }
@media (prefers-reduced-motion: reduce) { .ticker-dot { animation: none; } }

/* Page ledes */
.lede { font-size: 1.15rem; color: var(--ink); max-width: 42rem; margin: 0.2rem 0 0.4rem; }
.page-meta { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-soft); margin: 0 0 1rem; }
.page-meta a { color: inherit; }

/* Hero */
.hero { border-bottom: 1px solid var(--line); padding: 1.5rem 0 1.3rem; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 1rem 2.5rem; align-items: center; }
.hero-side .radar { margin: 0; }
.hero-side .radar svg { max-width: 23rem; margin: 0 auto; }
.hero-side .chip-row { justify-content: center; }
.hero-side .footnote { font-size: 0.74rem; text-align: center; margin: 0.4rem 0 0; }
@media (max-width: 52rem) { .hero-grid { grid-template-columns: 1fr; } }
.kicker { font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.74rem; color: var(--accent); margin: 0 0 0.3rem; }
.hero-number {
  font-family: var(--display); font-weight: 700; font-size: 4.8rem; line-height: 1;
  font-variant-numeric: tabular-nums; margin: 0;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-unit { font-size: 1.5rem; margin-left: 0.4rem; -webkit-text-fill-color: var(--ink-soft); color: var(--ink-soft); font-weight: 500; }
.hero-sub { max-width: 46rem; color: var(--ink-soft); }
.hero-note { font-family: var(--mono); font-size: 0.8rem; color: var(--ink-soft); }
.sparkline { color: var(--accent); margin-top: 0.5rem; filter: drop-shadow(0 0 6px rgba(46, 230, 168, 0.45)); }

/* Tables */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: rgba(46, 230, 168, 0.04); }
thead th {
  border-bottom: 1px solid var(--line-strong);
  font-family: var(--mono); font-weight: 500; font-size: 0.7rem;
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-soft);
  background: var(--bg-raise);
}
tbody th { font-weight: 600; font-family: var(--body); }
td.num, th.num { text-align: right; font-family: var(--mono); font-size: 0.88rem; font-variant-numeric: tabular-nums; }
td.num { color: var(--ink); }

/* Stats */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1rem; }
.stat {
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  padding: 1rem 1.1rem; position: relative; overflow: hidden;
}
.stat::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--gradient); }
.stat-label { margin: 0; font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-soft); }
.stat-value { margin: 0.35rem 0 0; font-family: var(--display); font-weight: 700; font-size: 1.8rem; font-variant-numeric: tabular-nums; }

/* Provenance + badges */
.source-line { font-size: 0.8rem; font-family: var(--mono); color: var(--ink-soft); margin: 0.6rem 0 0; }
.source-line a { color: inherit; }
.badge { display: inline-block; font-family: var(--mono); font-size: 0.68rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; padding: 0.12rem 0.5rem; border-radius: 999px; border: 1px solid currentColor; }
.badge-stale { background: var(--stale-bg); color: var(--stale-ink); }
.badge-warn { background: var(--warn-bg); color: var(--warn-ink); }
.footnote { font-size: 0.85rem; color: var(--ink-soft); }

/* Lists */
.corridor-list, .reg-list { padding-left: 0; list-style: none; }
.corridor-list li { padding: 0.5rem 0; border-bottom: 1px solid var(--line); }
.reg-list li { padding: 0.6rem 0; border-bottom: 1px solid var(--line); }
.reg-source { display: inline-block; min-width: 9rem; font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); }
.reg-list time { display: block; font-family: var(--mono); font-size: 0.76rem; color: var(--ink-soft); margin-left: 9rem; }

/* Interactive enhancements (site.js) */
th.sortable { cursor: pointer; user-select: none; }
th.sortable:hover { color: var(--ink); }
th.sortable[data-dir="asc"]::after { content: " ↑"; color: var(--accent); }
th.sortable[data-dir="desc"]::after { content: " ↓"; color: var(--accent); }

.chart-tip {
  position: absolute; z-index: 10; pointer-events: none;
  font-family: var(--mono); font-size: 0.76rem; color: var(--ink);
  background: var(--bg-raise); border: 1px solid var(--line-strong);
  border-radius: 6px; padding: 0.3rem 0.55rem; max-width: 18rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

.index-chart { margin: 1rem 0 0; }
.index-chart svg { width: 100%; height: auto; }
.index-chart .chip-row { margin: 0.2rem 0 0.5rem; }
/* Each series group sets its own `color`; the line and dots inherit it. */
.chart-series { color: var(--accent); }
.chart-line { stroke: currentColor; stroke-width: 2; }
.chart-series[data-series="index"] .chart-line { filter: drop-shadow(0 0 5px rgba(46, 230, 168, 0.4)); }
.chart-dot { fill: currentColor; }
.chart-pt:hover .chart-dot { r: 4.5; fill: var(--accent-2); }
.chart-axis { fill: var(--ink-soft); font-family: var(--mono); font-size: 11px; }

.bar-chart { margin: 0.8rem 0 1.2rem; }
.bar-row { display: grid; grid-template-columns: 8.5rem 1fr 6rem; align-items: center; gap: 0.8rem; padding: 0.28rem 0; }
.bar-label { font-size: 0.88rem; font-weight: 500; }
.bar-track { background: rgba(140, 170, 195, 0.08); border-radius: 4px; }
.bar { height: 14px; border-radius: 4px; background: var(--gradient); min-width: 4px; opacity: 0.85; transition: opacity 0.15s; }
.bar:hover { opacity: 1; }
.bar-value { font-family: var(--mono); font-size: 0.82rem; text-align: right; color: var(--ink-soft); }

/* Radar */
.radar { margin: 1rem 0; }
.radar svg { max-width: 26rem; width: 100%; height: auto; display: block; }
.radar-grid { fill: none; stroke: var(--line); stroke-width: 1; }
.radar-axis { fill: var(--ink-soft); font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; }
.radar-poly { fill-opacity: 0.09; stroke-width: 1.8; stroke-linejoin: round; transition: fill-opacity 0.15s, opacity 0.25s; }
.radar-poly:hover { fill-opacity: 0.24; }
.chip-row { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.7rem 0 0.2rem; }
.chip {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--mono); font-size: 0.75rem; color: var(--ink-soft);
  background: var(--panel); border: 1px solid var(--line); border-radius: 999px;
  padding: 0.25rem 0.7rem; cursor: pointer;
}
.chip-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.chip:not(.active) { opacity: 0.45; }
.chip:not(.active) .chip-dot { background: var(--ink-soft) !important; }
.chip:hover { color: var(--ink); border-color: var(--line-strong); }
.chip-score { color: var(--accent); font-weight: 500; margin-left: 0.15rem; }
.chip:not(.active) .chip-score { color: inherit; }

.filter-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; margin: 0.8rem 0; }
.rank-row { margin-bottom: 0.6rem; }
.rank-label { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-soft); }
.filter-btn {
  font-family: var(--mono); font-size: 0.78rem; color: var(--ink-soft);
  background: var(--panel); border: 1px solid var(--line); border-radius: 999px;
  padding: 0.3rem 0.85rem; cursor: pointer;
}
.filter-btn:hover { color: var(--ink); border-color: var(--line-strong); }
.filter-btn.active { color: var(--accent); border-color: rgba(46, 230, 168, 0.5); background: rgba(46, 230, 168, 0.08); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-raise); margin-top: 2.5rem; }
.site-footer .wrap { padding-top: 1.3rem; padding-bottom: 1.7rem; }
.site-footer p { font-size: 0.82rem; color: var(--ink-soft); max-width: 52rem; }
.site-footer a { color: var(--ink-soft); }
.site-footer a:hover { color: var(--ink); }
.site-footer a.footer-acquire { color: var(--accent); font-weight: 600; }
.site-footer a.footer-acquire:hover { color: var(--accent-2); }
.footer-fine { font-family: var(--mono); font-size: 0.72rem; }

/* Subtle load animations — motion-safe only; pages are static without them */
@media (prefers-reduced-motion: no-preference) {
  .chart-line {
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    animation: chart-draw 1.4s cubic-bezier(0.4, 0, 0.2, 1) 0.15s forwards;
  }
  .chart-area { opacity: 0; animation: fade-in 0.8s ease-out 1.1s forwards; }
  /* Once the reader is picking series, the draw-in becomes a delay, not a
     flourish — swapped series appear at once. */
  .index-chart.picked .chart-line { animation: none; stroke-dashoffset: 0; }
  .index-chart.picked .chart-area { animation: none; opacity: 1; }
  .bar { transform-origin: left; animation: bar-grow 0.8s cubic-bezier(0.2, 0.7, 0.3, 1) backwards; }
  .bar-row:nth-child(2) .bar { animation-delay: 0.07s; }
  .bar-row:nth-child(3) .bar { animation-delay: 0.14s; }
  .bar-row:nth-child(4) .bar { animation-delay: 0.21s; }
  .bar-row:nth-child(5) .bar { animation-delay: 0.28s; }
  .bar-row:nth-child(6) .bar { animation-delay: 0.35s; }
  .bar-row:nth-child(7) .bar { animation-delay: 0.42s; }
  .bar-row:nth-child(8) .bar { animation-delay: 0.49s; }
  .bar-row:nth-child(9) .bar { animation-delay: 0.56s; }
  .stat { animation: rise-in 0.5s ease-out backwards; }
  .stat:nth-child(2) { animation-delay: 0.08s; }
  .stat:nth-child(3) { animation-delay: 0.16s; }
  .hero .kicker, .hero .hero-number, .hero .hero-sub { animation: rise-in 0.55s ease-out backwards; }
  .hero .hero-sub { animation-delay: 0.1s; }
  .radar-poly {
    transform-box: view-box; transform-origin: 50% 54.3%;
    animation: radar-in 0.75s cubic-bezier(0.2, 0.7, 0.3, 1) backwards;
  }
}
@keyframes radar-in { from { opacity: 0; transform: scale(0.5); } }
@keyframes chart-draw { to { stroke-dashoffset: 0; } }
@keyframes fade-in { to { opacity: 1; } }
@keyframes bar-grow { from { transform: scaleX(0); } }
@keyframes rise-in { from { opacity: 0; transform: translateY(6px); } }

@media (max-width: 40rem) {
  .hero-number { font-size: 3.2rem; }
  .reg-list time { margin-left: 0; }
}

/* Per-rail pages */
.stat-unit { font-size: 0.55em; color: var(--ink-soft); margin-left: 0.15em; }
.rail-others { line-height: 2; }
.rail-others a { white-space: nowrap; }
main .rail-link { color: inherit; text-decoration: none; border-bottom: 1px dotted var(--line-strong); }
main .rail-link:hover { color: var(--accent); border-bottom-color: var(--accent); }