/* Gapnium — black, clean, data-first. */

:root {
  color-scheme: dark;
  --bg: #000;
  --surface: #0a0a0b;
  --surface-2: #121214;
  --surface-3: #1a1a1d;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f0efec;
  --text-2: #b9b8b1;
  --muted: #807f78;
  --grid: #1c1c1f;
  --axis: #34343a;
  --up: #2fbf5b;
  --down: #e66767;
  --focus: #9ec5f4;

  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --radius: 10px;
  --wrap: 1200px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--text); text-decoration-color: rgba(255,255,255,.3); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; font-weight: 600; }
h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); margin: .2em 0 .4em; }
h2 { font-size: 1.35rem; margin: 2em 0 .6em; }
h3 { font-size: 1.05rem; margin: 1.6em 0 .4em; }
.mono { font-family: var(--mono); font-feature-settings: "zero" 1; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.up { color: var(--up); }
.down { color: var(--down); }
.sr, .hp { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--text); color: #000; padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }
.center { text-align: center; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

.eyebrow { font: 500 .78rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--text-2); margin: 0; }
.eyebrow a { color: var(--text-2); text-decoration: none; }
.eyebrow a:hover { color: var(--text); }
.lede { font-size: 1.15rem; color: var(--text-2); line-height: 1.55; }

/* ── Header ─────────────────────────────────────────────── */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(0,0,0,.82); backdrop-filter: saturate(140%) blur(12px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand-mark { width: 28px; height: 28px; }
.brand-word { font-weight: 600; font-size: 1.15rem; letter-spacing: .02em; }
.brand-word.small { font-size: 1rem; }
.site-nav { margin-left: auto; display: flex; gap: 4px; }
.site-nav a { color: var(--text-2); text-decoration: none; font-size: .9rem; padding: 8px 12px; border-radius: 8px; white-space: nowrap; }
.site-nav a:hover { color: var(--text); background: var(--surface-2); }
.site-nav a[aria-current="page"] { color: var(--text); background: var(--surface-3); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--border-strong); border-radius: 8px; width: 40px; height: 40px; cursor: pointer; }
.nav-toggle .bars, .nav-toggle .bars::before, .nav-toggle .bars::after { display: block; width: 18px; height: 2px; background: var(--text); margin: 0 auto; position: relative; content: ""; }
.nav-toggle .bars::before { position: absolute; top: -6px; }
.nav-toggle .bars::after { position: absolute; top: 6px; }
@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; left: 0; right: 0; top: 64px; flex-direction: column; background: #000; border-bottom: 1px solid var(--border); padding: 8px 16px 16px; }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px; }
}

/* ── Footer ─────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--border); margin-top: 96px; padding: 40px 0 56px; }
.footer-inner { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-inner p { max-width: 420px; font-size: .9rem; }
.footer-links { display: grid; grid-template-columns: repeat(2, auto); gap: 6px 32px; align-content: start; }
.footer-links a { color: var(--text-2); text-decoration: none; font-size: .9rem; }
.footer-links a:hover { color: var(--text); }

/* ── Hero ───────────────────────────────────────────────── */
.hero { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px 48px; padding-top: 56px; padding-bottom: 24px; }
.hero-figure { display: flex; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin: 8px 0 12px; }
.hero-value { font-size: clamp(3.6rem, 11vw, 7.5rem); font-weight: 500; line-height: .95; letter-spacing: -0.04em; }
.hero-deltas { display: flex; flex-direction: column; gap: 6px; padding-bottom: 10px; }
.delta-pill { font-size: .85rem; padding: 3px 10px; border-radius: 99px; background: var(--surface-2); border: 1px solid var(--border); }
.delta-pill .mono { font-weight: 600; }
.hero-lede { color: var(--text-2); max-width: 560px; margin: 0; }
.hero-side { display: grid; grid-template-columns: 1fr; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; align-self: center; }
.stat { display: flex; flex-direction: column; gap: 2px; padding: 14px 18px; background: var(--surface); }
.stat-label { font: 500 .72rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.stat-value { font-size: 1.5rem; font-weight: 500; }
.stat-value small { font-size: .9rem; color: var(--muted); margin-left: 2px; }
.stat-note { font-size: .8rem; }
.gapbar { grid-column: 1 / -1; margin-top: 12px; }
.gapbar-track { position: relative; height: 10px; border-radius: 99px; background: var(--surface-3); }
.gapbar-fill { position: absolute; inset: 0 auto 0 0; border-radius: 99px; background: linear-gradient(90deg, #3a3a3f, var(--text)); }
.gapbar-now { position: absolute; top: -26px; transform: translateX(-50%); font-size: .72rem; color: var(--text); }
.gapbar-now::after { content: ""; position: absolute; left: 50%; top: 20px; width: 2px; height: 22px; background: var(--text); transform: translateX(-50%); }
.gapbar-labels { display: flex; justify-content: space-between; font-size: .72rem; color: var(--muted); margin-top: 8px; }
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 32px; }
  .hero-side { grid-template-columns: repeat(3, 1fr); }
  .stat { padding: 12px; }
  .stat-value { font-size: 1.15rem; }
}
@media (max-width: 520px) {
  .hero-side { grid-template-columns: 1fr; }
  .gapbar-labels span:nth-child(2), .gapbar-labels span:nth-child(4) { display: none; }
}

/* ── Tier tiles ─────────────────────────────────────────── */
.tiers { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; margin-top: 24px; margin-bottom: 24px; }
.tier { position: relative; display: flex; flex-direction: column; gap: 4px; padding: 12px 12px 30px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); text-decoration: none; overflow: hidden; transition: border-color .15s, background .15s; }
.tier:hover { border-color: var(--border-strong); background: var(--surface-2); }
.tier-top { display: flex; align-items: center; gap: 6px; min-width: 0; }
.tier-symbol { font-size: .7rem; color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tier-value { font-size: 1.35rem; font-weight: 500; }
.tier-foot { display: flex; justify-content: space-between; font-size: .72rem; gap: 4px; }
.spark { position: absolute; left: 0; right: 0; bottom: 0; width: 100%; height: 24px; }
.spark path { fill: none; stroke: var(--c); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
@media (max-width: 1100px) { .tiers { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 600px) { .tiers { grid-template-columns: repeat(2, 1fr); } }

.key { display: inline-block; flex: none; width: 14px; height: 3px; border-radius: 2px; background: var(--c, var(--text)); vertical-align: middle; }
.key.big { width: 22px; height: 5px; }
.key-overall { height: 4px; background: var(--text); }

/* ── Chart card ─────────────────────────────────────────── */
.chart-card { border: 1px solid var(--border); border-radius: 14px; background: var(--surface); padding: 16px; margin: 16px 0 32px; }
.chart-toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 10px; }
.seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; padding: 2px; }
.seg button { font: 500 .8rem var(--mono); color: var(--text-2); background: none; border: 0; padding: 6px 11px; border-radius: 6px; cursor: pointer; }
.seg button:hover { color: var(--text); }
.seg button[aria-pressed="true"] { background: var(--surface-3); color: var(--text); box-shadow: inset 0 0 0 1px var(--border-strong); }
.legend { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 8px; }
.legend-item { display: inline-flex; align-items: center; gap: 7px; font: 500 .8rem var(--font); color: var(--text-2); background: none; border: 1px solid transparent; border-radius: 99px; padding: 4px 10px; cursor: pointer; }
.legend-item:hover { border-color: var(--border-strong); color: var(--text); }
.legend-item[aria-pressed="false"] { color: var(--muted); }
.legend-item[aria-pressed="false"] .key { opacity: .25; }
.legend-item[aria-pressed="false"] span:last-child { text-decoration: line-through; text-decoration-color: var(--muted); }

.chart-body { display: grid; grid-template-columns: 1fr; gap: 16px; }
.chart-card.has-panel .chart-body { grid-template-columns: minmax(0, 1fr) 340px; }
@media (max-width: 980px) { .chart-card.has-panel .chart-body { grid-template-columns: 1fr; } }
.chart-plot { position: relative; min-width: 0; }
.chart-svg { width: 100%; height: 440px; outline: none; touch-action: pan-y; }
.chart-svg:focus-visible { box-shadow: 0 0 0 2px var(--focus); border-radius: 8px; }
@media (max-width: 600px) { .chart-svg { height: 320px; } .chart-card { padding: 12px; } }
.chart-svg svg { display: block; width: 100%; height: 100%; overflow: visible; }
.chart-hint { font-size: .78rem; margin: 6px 0 0; }

.grid-line { stroke: var(--grid); stroke-width: 1; }
.axis-line { stroke: var(--axis); stroke-width: 1; }
.tick { fill: var(--muted); font: 400 11px var(--mono); }
.sing-line { stroke: var(--text); stroke-width: 1; stroke-dasharray: 3 5; opacity: .5; }
.sing-label { fill: var(--text-2); font: 500 11px var(--mono); letter-spacing: .08em; }
.series { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; transition: opacity .2s; }
.series.overall { stroke: var(--text); stroke-width: 2.75; }
.series.dim { opacity: .28; }
.area { fill: url(#overall-fill); }
.marker { cursor: pointer; }
.marker circle.m { fill: var(--text); stroke: var(--surface); stroke-width: 2; transition: r .12s; }
.marker.neg circle.m { fill: var(--surface); stroke: var(--down); stroke-width: 2; }
.marker circle.hit { fill: transparent; stroke: none; }
.marker.selected circle.m { fill: var(--focus); }
.marker.neg.selected circle.m { fill: var(--down); stroke: var(--surface); }
.marker .ring { fill: none; stroke: var(--focus); stroke-width: 1.5; opacity: 0; }
.marker.selected .ring { opacity: 1; }
.crosshair { stroke: var(--text-2); stroke-width: 1; stroke-dasharray: 2 3; pointer-events: none; }
.hover-dot { stroke: var(--surface); stroke-width: 2; pointer-events: none; }

.tooltip { position: absolute; z-index: 5; pointer-events: none; min-width: 210px; max-width: 280px; padding: 10px 12px; background: rgba(18,18,20,.96); border: 1px solid var(--border-strong); border-radius: 10px; box-shadow: 0 12px 40px rgba(0,0,0,.6); font-size: .8rem; }
.tooltip .tt-date { font: 500 .72rem var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 6px; }
.tooltip .tt-row { display: grid; grid-template-columns: 14px 1fr auto; align-items: center; gap: 8px; line-height: 1.7; }
.tooltip .tt-row b { font: 600 .8rem var(--mono); text-align: right; }
.tooltip .tt-row span { color: var(--text-2); }
.tooltip .tt-row.overall b { color: var(--text); font-size: .9rem; }
.tooltip .tt-events { border-top: 1px solid var(--border); margin-top: 8px; padding-top: 8px; }
.tooltip .tt-ev { color: var(--text); line-height: 1.35; margin-bottom: 4px; }
.tooltip .tt-ev small { color: var(--muted); }

/* Event panel */
.event-panel { border-left: 1px solid var(--border); padding-left: 16px; max-height: 500px; overflow-y: auto; scrollbar-width: thin; }
@media (max-width: 980px) { .event-panel { border-left: 0; border-top: 1px solid var(--border); padding: 16px 0 0; max-height: none; } }
.ep-date { font: 500 .72rem var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .1em; }
.ep-event + .ep-event { border-top: 1px solid var(--border); margin-top: 16px; padding-top: 16px; }
.ep-event h3 { margin: 6px 0 6px; font-size: 1.05rem; }
.ep-event h3 a { text-decoration: none; }
.ep-event h3 a:hover { text-decoration: underline; }
.ep-event p { margin: 0 0 10px; color: var(--text-2); font-size: .9rem; }
.ep-meta { font-size: .75rem; color: var(--muted); margin-top: 8px; }
.ep-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.ep-nav { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 10px; }

/* Impacts list */
.impacts { list-style: none; margin: 0 0 10px; padding: 0; }
.impacts li { padding: 7px 0; border-top: 1px solid var(--border); font-size: .85rem; }
.impact-head { display: flex; align-items: center; gap: 8px; }
.impact-head a { text-decoration: none; font-size: .78rem; color: var(--text-2); }
.impact-head a:hover { color: var(--text); }
.impact-head .delta { margin-left: auto; font-weight: 600; }
.impact-why { display: block; color: var(--text-2); margin-top: 2px; line-height: 1.45; }

.sources-mini { list-style: none; margin: 0; padding: 0; font-size: .82rem; }
.sources-mini li { margin: 4px 0; line-height: 1.4; }
.sources-mini a { color: var(--text); }

/* ── Buttons ────────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 6px; font: 500 .88rem var(--font); color: #000; background: var(--text); border: 1px solid var(--text); border-radius: 8px; padding: 9px 16px; text-decoration: none; cursor: pointer; }
.btn:hover { background: #fff; }
.btn.ghost { color: var(--text); background: transparent; border-color: var(--border-strong); }
.btn.ghost:hover { background: var(--surface-2); }
.btn.sm { padding: 5px 10px; font-size: .8rem; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }

/* ── Event log ──────────────────────────────────────────── */
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin: 48px 0 8px; }
.section-head h2 { margin: 0; }
.filter { display: inline-flex; align-items: center; gap: 8px; font-size: .85rem; }
select, input, textarea { font: inherit; color: var(--text); background: var(--surface-2); border: 1px solid var(--border-strong); border-radius: 8px; padding: 8px 10px; }
select { padding-right: 28px; }
.log { list-style: none; margin: 0; padding: 0; }
.log-item { display: grid; grid-template-columns: 120px 1fr; gap: 24px; padding: 22px 0; border-top: 1px solid var(--border); }
.log-item:target { background: linear-gradient(90deg, rgba(158,197,244,.06), transparent); }
.log-date { font-size: .8rem; color: var(--muted); padding-top: 3px; }
.log-main h3 { margin: 0 0 4px; font-size: 1.08rem; }
.log-main h3 a { text-decoration: none; }
.log-main h3 a:hover { text-decoration: underline; }
.log-main p { margin: 0 0 10px; color: var(--text-2); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: .75rem; padding: 3px 9px; border-radius: 99px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text-2); }
.chip .delta { font-weight: 600; }
.log-sources { display: flex; flex-direction: column; gap: 2px; font-size: .85rem; }
.log-sources a { text-decoration: none; }
.log-sources a:hover { text-decoration: underline; }
@media (max-width: 640px) { .log-item { grid-template-columns: 1fr; gap: 4px; } }

/* ── Prose pages ────────────────────────────────────────── */
.prose { padding-top: 48px; }
.prose p, .prose li { color: var(--text-2); }
.prose strong { color: var(--text); font-weight: 600; }
.prose ul { padding-left: 1.2em; }
.prose li { margin: .35em 0; }
.callout { border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--surface); padding: 20px 24px; margin: 16px 0; }
.callout .big { font-size: 1.8rem; color: var(--text); margin: 0 0 8px; }
.accent { color: var(--focus); }
.formula { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); padding: 12px 20px; overflow-x: auto; }
.formula p { color: var(--text); font-size: 1.02rem; margin: 10px 0; white-space: nowrap; }
.table-wrap { overflow-x: auto; margin: 12px 0; border: 1px solid var(--border); border-radius: var(--radius); }
table.data { width: 100%; border-collapse: collapse; font-size: .88rem; }
table.data th, table.data td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
table.data th { font: 500 .72rem var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); background: var(--surface); }
table.data td { color: var(--text-2); }
table.data td a { text-decoration: none; color: var(--text); }
table.data .num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
table.data tfoot td { border-bottom: 0; color: var(--text); background: var(--surface); }
.tier-def { border-left: 2px solid var(--c); padding: 2px 0 2px 18px; margin: 24px 0; }
.tier-def h3 { margin-top: 0; }
.tier-def .key { width: 10px; height: 10px; border-radius: 50%; }

/* ── Event page ─────────────────────────────────────────── */
.event-page { padding-top: 40px; }
.event-page h1 { max-width: 900px; }
.event-meta { font-size: .88rem; }
.event-grid { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 40px; margin-bottom: 24px; }
.event-grid .prose { padding-top: 0; }
@media (max-width: 900px) { .event-grid { grid-template-columns: 1fr; } }
.event-side { display: flex; flex-direction: column; gap: 12px; }
.card { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); padding: 16px 18px; }
.card h3 { font-size: .9rem; margin: 14px 0 6px; }
.big-delta { font-size: 2.2rem; margin: 4px 0 0; font-weight: 500; }
.review dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 10px 0; font-size: .85rem; }
.review dt { color: var(--muted); }
.review dd { margin: 0; text-align: right; }
.actions { display: flex; flex-direction: column; gap: 8px; }
.actions .btn { justify-content: center; }
.sources { padding-left: 1.2em; }
.sources li { margin-bottom: 10px; }
.sources li span { display: block; font-size: .82rem; }

/* ── Coefficient page ───────────────────────────────────── */
.coef-page { padding-top: 40px; }
.coef-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.coef-head h1 { display: flex; align-items: center; gap: 14px; font-size: clamp(1.5rem, 4vw, 2.4rem); }
.coef-head .key { background: var(--c); }
.coef-head .lede { margin-top: 0; }
.coef-figures { display: flex; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.narrow-left { max-width: 760px; padding-top: 0; }

/* ── Forms ──────────────────────────────────────────────── */
.form-page { padding-top: 48px; }
.form { display: flex; flex-direction: column; gap: 18px; margin: 24px 0; }
.field { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 0; }
.field > span { font-size: .88rem; font-weight: 500; }
.field em { font-style: normal; font-size: .75rem; font-weight: 400; margin-left: 6px; }
.field em.req { color: var(--text-2); }
.field small { font-size: .78rem; }
.field-row { display: flex; gap: 16px; }
@media (max-width: 600px) { .field-row { flex-direction: column; } }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--focus); outline-offset: 0; border-color: transparent; }
textarea { resize: vertical; min-height: 140px; }
.form .btn { align-self: flex-start; }
.ref-box { border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 12px 16px; background: var(--surface); display: flex; flex-direction: column; }
.ref-box span { font-size: .78rem; }
.notice { border-radius: var(--radius); padding: 14px 18px; margin: 20px 0; border: 1px solid; }
.notice ul { margin: 0; padding-left: 1.2em; }
.notice.ok { border-color: rgba(47,191,91,.4); background: rgba(47,191,91,.07); }
.notice.err { border-color: rgba(230,103,103,.45); background: rgba(230,103,103,.07); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }