/* Shared styles for the interactive explainers (explainers/<name>/index.html).
   Same tokens as the site (assets/theme.scss). Each explainer is
   self-contained and embedded in its blog post via {{< explainer name >}}.
   Dark mode follows the site toggle (postMessage) or the OS setting. */

@font-face { font-family: "Instrument Sans"; font-style: normal; font-weight: 400 700; font-display: swap;
  src: url("../../assets/fonts/instrument-sans-latin-wght-normal.woff2") format("woff2"); }
@font-face { font-family: "Instrument Sans"; font-style: italic; font-weight: 400 700; font-display: swap;
  src: url("../../assets/fonts/instrument-sans-latin-wght-italic.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 300 700; font-display: swap;
  src: url("../../assets/fonts/jetbrains-mono-latin-wght-normal.woff2") format("woff2"); }

:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f5f7f9;
  --border: #e3e7ec;
  --grid: #edf0f3;
  --text: #404248;
  --heading: #17181b;
  --muted: #6b6f78;
  --accent: #52c8ff;
  --accent-soft: rgba(82, 200, 255, .16);
  --s1: #1497d6;              /* categorical slot 1 (blue) */
  --s1-soft: rgba(20, 151, 214, .18);
  --s2: #d9772b;              /* categorical slot 2 (orange) */
  --s2-soft: rgba(217, 119, 43, .22);
  --neutral: #a3a9b2;         /* reference / "not significant" / null */
  --neutral-soft: rgba(163, 169, 178, .22);
  --seq-1: #a9d8f3; --seq-2: #4aa8e0; --seq-3: #0b6fa4;   /* sequential blues */
  --radius: 14px;
  --ease: cubic-bezier(.2, .8, .2, 1);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e1013;
  --surface: #15181d;
  --border: #272c34;
  --grid: #1d2128;
  --text: #c6cbd3;
  --heading: #f2f4f7;
  --muted: #8b919b;
  --accent-soft: rgba(82, 200, 255, .14);
  --s1: #2f9ad3;
  --s1-soft: rgba(47, 154, 211, .24);
  --s2: #d9772b;
  --s2-soft: rgba(217, 119, 43, .26);
  --neutral: #5d636d;
  --neutral-soft: rgba(120, 128, 140, .22);
  --seq-1: #1d5578; --seq-2: #2f9ad3; --seq-3: #9fdcff;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body {
  font: 15px/1.55 "Instrument Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  padding: 20px 22px 18px;
}
.ex { max-width: 980px; margin: 0 auto; }
.ex-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 12px; }
.ex-title { margin: 0; font-size: 1.02rem; font-weight: 600; color: var(--heading); letter-spacing: -.005em; }
.ex-hint { margin: 0; font-size: .82rem; color: var(--muted); }

/* Controls */
.ex-controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px 22px; margin: 4px 0 14px; }
.ex-control label { display: flex; justify-content: space-between; align-items: baseline; font-size: .8rem; color: var(--muted); margin-bottom: 4px; }
.ex-control output { font: 600 .86rem "JetBrains Mono", ui-monospace, monospace; color: var(--heading); font-variant-numeric: tabular-nums; }
input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 22px; background: transparent; cursor: pointer; margin: 0; }
input[type="range"]::-webkit-slider-runnable-track { height: 4px; border-radius: 4px; background: linear-gradient(to right, var(--s1) var(--fill, 50%), var(--border) var(--fill, 50%)); }
input[type="range"]::-moz-range-track { height: 4px; border-radius: 4px; background: var(--border); }
input[type="range"]::-moz-range-progress { height: 4px; border-radius: 4px; background: var(--s1); }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; margin-top: -7px; border-radius: 50%; background: var(--bg); border: 2px solid var(--s1); box-shadow: 0 1px 4px rgba(0,0,0,.15); transition: transform .15s var(--ease), box-shadow .2s ease; }
input[type="range"]::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: var(--bg); border: 2px solid var(--s1); }
input[type="range"]:hover::-webkit-slider-thumb, input[type="range"]:focus-visible::-webkit-slider-thumb { transform: scale(1.12); box-shadow: 0 0 0 6px var(--accent-soft); }
input[type="range"]:focus-visible { outline: none; }

.ex-buttons { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
button.ex-btn {
  font: 500 .84rem "Instrument Sans", system-ui, sans-serif; color: var(--heading); background: var(--bg);
  border: 1px solid var(--border); border-radius: 999px; padding: .38rem .95rem; cursor: pointer;
  transition: background .2s ease, border-color .2s ease, transform .2s var(--ease);
}
button.ex-btn:hover { border-color: var(--s1); background: var(--accent-soft); }
button.ex-btn:active { transform: scale(.97); }
button.ex-btn.primary { background: var(--s1); border-color: var(--s1); color: #fff; }
button.ex-btn.primary:hover { filter: brightness(1.06); }
button.ex-btn[aria-pressed="true"] { background: var(--heading); color: var(--bg); border-color: var(--heading); }
button.ex-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Figures */
.ex-fig { position: relative; }
.ex-fig svg { display: block; width: 100%; height: auto; overflow: visible; }
.ex-row { display: grid; grid-template-columns: 1.35fr 1fr; gap: 22px; align-items: start; }
@media (max-width: 620px) { .ex-row { grid-template-columns: 1fr; } body { padding: 16px 14px; } }
.axis line, .axis path { stroke: var(--border); }
.axis text, .tick text { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.gridline { stroke: var(--grid); stroke-width: 1; }
.axis-label { fill: var(--muted); font-size: 11.5px; }
.lbl { fill: var(--heading); font-size: 12px; font-weight: 600; }
.lbl-muted { fill: var(--muted); font-size: 11.5px; }
.panel-title { font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin: 0 0 6px; }

/* Readouts (stat tiles) */
.ex-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin: 14px 0 6px; }
.ex-stat { border: 1px solid var(--border); border-radius: 12px; padding: .55rem .8rem; background: var(--bg); }
.ex-stat .k { font-size: .74rem; color: var(--muted); display: flex; align-items: center; gap: .4rem; }
.ex-stat .v { font: 600 1.35rem/1.25 "Instrument Sans", system-ui, sans-serif; color: var(--heading); font-variant-numeric: tabular-nums; }
.ex-stat .s { font-size: .74rem; color: var(--muted); }
.swatch { display: inline-block; width: 10px; height: 10px; border-radius: 3px; flex: none; }
.ex-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: .8rem; color: var(--text); margin: 6px 0 0; }
.ex-legend span { display: inline-flex; align-items: center; gap: .4rem; }
.ex-note { font-size: .84rem; color: var(--text); margin: 10px 0 0; padding: .6rem .85rem; border-radius: 10px; background: var(--surface); }
.ex-note b { color: var(--heading); }

/* Tooltip */
.ex-tip {
  position: absolute; pointer-events: none; z-index: 5; min-width: 120px;
  background: var(--heading); color: var(--bg); font-size: .78rem; line-height: 1.4;
  padding: .4rem .6rem; border-radius: 8px; box-shadow: 0 6px 20px rgba(0,0,0,.18);
  opacity: 0; transform: translateY(4px); transition: opacity .12s ease, transform .15s var(--ease);
}
.ex-tip.on { opacity: 1; transform: translateY(0); }
.ex-tip b { font-weight: 600; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
details.ex-table { margin-top: 10px; font-size: .8rem; color: var(--muted); }
details.ex-table summary { cursor: pointer; }
details.ex-table table { border-collapse: collapse; margin-top: 6px; font-variant-numeric: tabular-nums; }
details.ex-table td, details.ex-table th { padding: 2px 10px 2px 0; text-align: right; color: var(--text); }

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