:root {
  color-scheme: light;
  --plane: #f9f9f7; --surface: #fcfcfb; --raised: #ffffff;
  --ink: #0b0b0b; --ink-2: #52514e; --muted: #77756f;
  --grid: #e1e0d9; --axis: #c3c2b7; --border: rgba(11, 11, 11, 0.10); --border-strong: rgba(11, 11, 11, 0.18);
  --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --div-neg: #e34948;
  --good: #0ca30c; --warn: #fab219; --serious: #ec835a; --crit: #d03b3b;
  --good-ink: #006300; --warn-ink: #7a5200; --info-ink: #1c5cab;
  --good-wash: rgba(12, 163, 12, 0.10); --warn-wash: rgba(250, 178, 25, 0.16); --info-wash: rgba(42, 120, 214, 0.10);
  --star: #f6c453; --star-edge: #e9a23b;
  --link: #1c5cab;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --plane: #0d0d0d; --surface: #1a1a19; --raised: #222221;
    --ink: #f0efec; --ink-2: #c3c2b7; --muted: #98968f;
    --grid: #2c2c2a; --axis: #45453f; --border: rgba(255, 255, 255, 0.10); --border-strong: rgba(255, 255, 255, 0.20);
    --s1: #3987e5; --s2: #d95926; --s3: #199e70; --div-neg: #e66767;
    --good-ink: #4ccb4c; --warn-ink: #fab219; --info-ink: #86b6ef;
    --good-wash: rgba(12, 163, 12, 0.16); --warn-wash: rgba(250, 178, 25, 0.14); --info-wash: rgba(57, 135, 229, 0.16);
    --star: #f0bb48; --star-edge: #c9862a;
    --link: #86b6ef;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --plane: #0d0d0d; --surface: #1a1a19; --raised: #222221;
  --ink: #f0efec; --ink-2: #c3c2b7; --muted: #98968f;
  --grid: #2c2c2a; --axis: #45453f; --border: rgba(255, 255, 255, 0.10); --border-strong: rgba(255, 255, 255, 0.20);
  --s1: #3987e5; --s2: #d95926; --s3: #199e70; --div-neg: #e66767;
  --good-ink: #4ccb4c; --warn-ink: #fab219; --info-ink: #86b6ef;
  --good-wash: rgba(12, 163, 12, 0.16); --warn-wash: rgba(250, 178, 25, 0.14); --info-wash: rgba(57, 135, 229, 0.16);
  --star: #f0bb48; --star-edge: #c9862a;
  --link: #86b6ef;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--plane); color: var(--ink); font: 16px/1.6 var(--sans); }
a { color: var(--link); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
code, .mono { font-family: var(--mono); font-size: 0.92em; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- top bar */
.topbar { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--plane) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.topbar .wrap { display: flex; align-items: center; gap: 16px; height: 52px; }
.brand { font-family: var(--mono); font-size: 13px; font-weight: 600; color: var(--ink); text-decoration: none; white-space: nowrap; }
.topnav { display: flex; gap: 4px; overflow-x: auto; flex: 1; scrollbar-width: none; }
.topnav::-webkit-scrollbar { display: none; }
.topnav a { color: var(--ink-2); text-decoration: none; font-size: 14px; padding: 6px 10px; border-radius: 6px; white-space: nowrap; }
.topnav a:hover { background: var(--border); color: var(--ink); }
.theme-toggle { border: 1px solid var(--border-strong); background: transparent; color: var(--ink-2); border-radius: 6px; height: 32px; padding: 0 10px; font: 13px var(--sans); cursor: pointer; white-space: nowrap; }
.theme-toggle:hover { color: var(--ink); background: var(--border); }

/* ---------- hero */
.hero { padding: 56px 0 28px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; align-items: center; }
@media (max-width: 820px) { .hero-grid { grid-template-columns: 1fr; } .hero-art { max-width: 260px; } .hero { padding-top: 36px; } }
.kicker { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; }
h1 { font-size: clamp(38px, 6.4vw, 64px); line-height: 1.04; letter-spacing: -0.03em; font-weight: 650; margin: 0 0 18px; }
.lede { font-size: clamp(18px, 2.1vw, 21px); line-height: 1.5; color: var(--ink-2); max-width: 40em; margin: 0 0 22px; }
.lede strong { color: var(--ink); font-weight: 600; }
.hero-art svg { width: 100%; height: auto; display: block; }
.hero-art figcaption { font-size: 12.5px; color: var(--muted); margin-top: 8px; text-align: center; }
.art-star { fill: var(--star); } .art-limb { fill: none; stroke: var(--star-edge); stroke-width: 1.5; }
.art-planet { fill: #141413; } .art-path { stroke: var(--ink); stroke-width: 1; opacity: 0.35; }
.art-label { fill: var(--ink-2); font: 11px var(--sans); }

.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; line-height: 1; padding: 6px 10px 6px 8px; border-radius: 999px; white-space: nowrap; }
.pill svg { width: 14px; height: 14px; flex: none; }
.pill-good { background: var(--good-wash); color: var(--good-ink); }
.pill-warn { background: var(--warn-wash); color: var(--warn-ink); }
.pill-info { background: var(--info-wash); color: var(--info-ink); }
.pill-lg { font-size: 14.5px; padding: 8px 14px 8px 10px; }

.tiles { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; margin: 34px 0 0; padding: 0; list-style: none; }
@media (max-width: 900px) { .tiles { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 560px) { .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px 15px; min-width: 0; }
.tile-label { font-size: 13px; color: var(--ink-2); }
.tile-value { font-size: 27px; font-weight: 650; letter-spacing: -0.02em; line-height: 1.2; margin-top: 4px; white-space: nowrap; }
.tile-value small { font-size: 15px; font-weight: 500; color: var(--ink-2); letter-spacing: 0; }
.tile-note { font-size: 12.5px; color: var(--muted); margin-top: 3px; line-height: 1.35; }

/* ---------- sections */
section.block { padding: 44px 0 8px; }
h2 { font-size: clamp(24px, 3.2vw, 30px); letter-spacing: -0.02em; line-height: 1.2; margin: 0 0 8px; font-weight: 650; }
.section-intro { color: var(--ink-2); max-width: 46em; margin: 0 0 22px; }
h3 { font-size: 19px; letter-spacing: -0.01em; line-height: 1.3; margin: 0; font-weight: 650; }
h4 { font-size: 14px; margin: 22px 0 8px; font-weight: 650; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 24px; margin: 0 0 18px; }
@media (max-width: 600px) { .card { padding: 18px 16px; border-radius: 12px; } }
.ev:target { border-color: var(--s1); box-shadow: 0 0 0 3px var(--info-wash); }
.ev-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 10px; }
.ev-id { font-family: var(--mono); font-size: 12.5px; color: var(--muted); border: 1px solid var(--border-strong); border-radius: 6px; padding: 2px 6px; }
.ev-head h3 { flex: 1 1 240px; }
.permalink { font-size: 13px; color: var(--ink-2); text-decoration: none; border: 1px solid var(--border-strong); border-radius: 6px; padding: 4px 9px; background: transparent; cursor: pointer; font-family: var(--sans); white-space: nowrap; }
.permalink:hover { color: var(--ink); background: var(--border); }
.ev p { margin: 0 0 12px; max-width: 48em; }
.ev .result { color: var(--ink); }
.ev .why { color: var(--ink-2); }
.caption { font-size: 13.5px; color: var(--ink-2); margin: 10px 0 0; max-width: 52em; }
.files { margin: 16px 0 0; padding: 12px 0 0; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--ink-2); display: flex; flex-wrap: wrap; gap: 6px 8px; align-items: baseline; }
.files-label { font-weight: 600; color: var(--ink); margin-right: 4px; }
.files a { font-family: var(--mono); font-size: 12.5px; padding: 2px 7px; border: 1px solid var(--border); border-radius: 6px; text-decoration: none; background: var(--raised); }
.files a:hover { border-color: var(--link); }

.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px 28px; align-items: start; }
@media (max-width: 760px) { .two { grid-template-columns: 1fr; } }
.small-multiples { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 22px; }
@media (max-width: 760px) { .small-multiples { grid-template-columns: 1fr; } }
.sm-title { font-size: 13px; font-weight: 600; color: var(--ink-2); margin: 0 0 2px; }
.sm-title span { font-weight: 400; color: var(--muted); }

/* ---------- tables */
.table-wrap { overflow-x: auto; margin: 0; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th, td { text-align: left; padding: 9px 12px 9px 0; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { font-size: 12.5px; font-weight: 600; color: var(--ink-2); border-bottom-color: var(--border-strong); white-space: nowrap; }
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
tbody th { font-weight: 500; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; padding-right: 0; padding-left: 12px; }
.data-table { font-size: 13.5px; }
.data-table td, .data-table th { padding: 6px 12px 6px 0; }
.table-note { font-size: 12.5px; color: var(--muted); margin: 8px 0 0; }
.glance td:first-child { white-space: nowrap; }
.glance a { text-decoration: none; font-weight: 550; }
.glance a:hover { text-decoration: underline; }
.glance .mono { color: var(--muted); font-size: 12.5px; margin-right: 6px; }
details.tableview { margin-top: 12px; }
details.tableview > summary { cursor: pointer; font-size: 13.5px; color: var(--ink-2); width: fit-content; padding: 3px 0; }
details.tableview > summary:hover { color: var(--ink); }
details.tableview[open] > summary { margin-bottom: 8px; }
.nowrap { white-space: nowrap; }

/* ---------- lists */
.plain { margin: 0; padding-left: 1.1em; max-width: 50em; }
.plain li { margin: 0 0 8px; }
.callout { border-left: 3px solid var(--warn); background: var(--warn-wash); padding: 12px 16px; border-radius: 0 10px 10px 0; margin: 0 0 16px; max-width: 52em; }
.callout p { margin: 0; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; max-width: 50em; }
.steps li { counter-increment: s; position: relative; padding: 0 0 12px 36px; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 1px; width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--border-strong); font: 600 12.5px/22px var(--mono); text-align: center; color: var(--ink-2); }

/* ---------- charts */
.viz { position: relative; margin-top: 6px; }
.viz-frame { position: relative; }
.viz svg { display: block; touch-action: pan-y; }
.viz-legend { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 13px; color: var(--ink-2); margin: 2px 0 6px; }
.viz-legend-item { display: inline-flex; align-items: center; gap: 7px; }
.viz-swatch { display: inline-block; background: var(--c); flex: none; }
.viz-swatch-dot { width: 9px; height: 9px; border-radius: 50%; }
.viz-swatch-line { width: 18px; height: 2px; border-radius: 1px; }
.viz-swatch-bar { width: 10px; height: 10px; border-radius: 2px; }
.viz-ylabel { font-size: 12px; color: var(--ink-2); margin: 0 0 2px; }
.viz-grid { stroke: var(--grid); stroke-width: 1; shape-rendering: crispEdges; }
.viz-axis { stroke: var(--axis); stroke-width: 1; shape-rendering: crispEdges; }
.viz-tick { fill: var(--muted); font: 11px var(--sans); font-variant-numeric: tabular-nums; }
.viz-axis-title { fill: var(--ink-2); font: 12px var(--sans); }
.viz-ref { stroke: var(--ink-2); stroke-width: 1; opacity: 0.55; shape-rendering: crispEdges; }
.viz-ref-faint { opacity: 0.22; }
.viz-ref-circle { fill: none; stroke: var(--ink-2); stroke-width: 1; opacity: 0.5; }
.viz-band { fill: var(--ink); opacity: 0.045; }
.viz-mark-label { fill: var(--ink-2); font: 11.5px var(--sans); }
.viz-ring { stroke: var(--surface); stroke-width: 2; }
.viz-hover-ring { fill: none; stroke: var(--ink); stroke-width: 1.5; pointer-events: none; }
.viz-tip { position: absolute; z-index: 5; pointer-events: none; background: var(--raised); color: var(--ink); border: 1px solid var(--border-strong); border-radius: 8px; padding: 7px 10px; font-size: 12.5px; line-height: 1.45; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.14); white-space: nowrap; }
.viz-tip-title { font-weight: 650; margin-bottom: 2px; }
.viz-tip-row { display: flex; justify-content: space-between; gap: 14px; }
.viz-tip-key { color: var(--ink-2); }
.viz-tip-val { font-variant-numeric: tabular-nums; font-weight: 550; }
.viz-bars { display: grid; gap: 9px; margin-top: 6px; }
.viz-bar-row { display: grid; grid-template-columns: minmax(150px, 34%) minmax(0, 1fr) 62px; gap: 12px; align-items: center; font-size: 13.5px; }
@media (max-width: 560px) { .viz-bar-row { grid-template-columns: 1fr 56px; } .viz-bar-label { grid-column: 1 / -1; margin-bottom: -4px; } }
.viz-bar-label { color: var(--ink-2); line-height: 1.3; }
.viz-bar-track { height: 14px; border-left: 1px solid var(--axis); }
.viz-bar { height: 14px; border-radius: 0 4px 4px 0; min-width: 2px; }
.viz-bar-value { text-align: right; font-variant-numeric: tabular-nums; font-weight: 550; }
.viz-pixels { width: 100%; height: auto; display: block; border-radius: 4px; }
.viz-pixels-bg { fill: var(--plane); }
.viz-marker-cross { stroke: var(--ink); stroke-width: 1.4; }
.viz-marker-ring { fill: none; stroke: var(--s2); stroke-width: 1.8; }
.cutouts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px 22px; margin-top: 8px; }
@media (max-width: 760px) { .cutouts { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 420px) { .cutouts { grid-template-columns: 1fr; } }
.cutout-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.cutout-cap { font-size: 12.5px; color: var(--ink-2); margin-top: 6px; line-height: 1.35; }
.cutout-cap b { color: var(--ink); font-weight: 600; }
.key { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 13px; color: var(--ink-2); margin: 12px 0 0; }
.key span { display: inline-flex; align-items: center; gap: 7px; }
.key i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; }
.key .k-cross { width: 12px; height: 12px; background: linear-gradient(var(--ink), var(--ink)) center / 100% 1.5px no-repeat, linear-gradient(var(--ink), var(--ink)) center / 1.5px 100% no-repeat; border-radius: 0; }
.key .k-ring { border: 2px solid var(--s2); border-radius: 50%; background: none; }
.map-wrap { max-width: 470px; }

/* ---------- footer */
footer { margin-top: 48px; padding: 28px 0 56px; border-top: 1px solid var(--border); color: var(--ink-2); font-size: 14px; }
footer p { margin: 0 0 8px; max-width: 56em; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--ink); color: var(--plane); font-size: 13.5px; padding: 8px 14px; border-radius: 8px; opacity: 0; pointer-events: none; transition: opacity 0.15s; z-index: 50; }
.toast.on { opacity: 1; }