:root {
  --bg: #0a0e13;
  --panel: #121821;
  --panel-2: #1a2230;
  --panel-3: #212b3b;
  --ink: #eef1f6;
  --ink-dim: #aab4c4;
  --ink-faint: #6d7a8d;
  --line: #2a3341;
  --line-soft: #1e2733;
  --accent: #e8a33d;
  --accent-dim: #a87730;
  --cyan: #57c7c2;
  --cyan-dim: #2f6f6c;
  --danger: #e2583f;
  --sky: #2f6fa8;
  --ground: #8a5a34;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --wrap: 780px;
}

* { box-sizing: border-box; }
html { background: var(--bg); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }

a { color: var(--cyan); }
a:hover { color: var(--accent); }
::selection { background: var(--accent-dim); color: var(--ink); }

.skip:focus {
  position: fixed !important;
  left: 12px !important;
  top: 12px !important;
  z-index: 100;
  background: var(--accent);
  color: #1a1305;
  padding: 10px 16px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
}

.top { padding: 16px 22px; font-size: 14px; }
.top a { color: var(--ink-faint); text-decoration: none; }
.top a:hover { color: var(--accent); }

.masthead { padding-top: 10px; padding-bottom: 14px; }
.kicker {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 16px;
}
h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 52px;
  line-height: 1.08;
  margin: 0 0 18px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.deck {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.48;
  color: var(--ink-dim);
  margin: 0 0 8px;
  font-weight: 500;
  font-style: italic;
}

main { padding-bottom: 8px; }
p { margin: 0 0 22px; color: var(--ink); }
p.lede { font-size: 20px; color: var(--ink); }

h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 30px;
  margin: 52px 0 18px;
  color: var(--ink);
}
h2 .num { color: var(--accent); font-family: var(--mono); font-size: 0.55em; letter-spacing: 0.05em; display: block; margin-bottom: 8px; font-weight: 600; }
h3 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 17px;
  margin: 0 0 10px;
  color: var(--ink);
}

.langbar { margin: 18px 0 6px; font-size: 14px; color: var(--ink-faint); }
.langbar a { color: var(--ink-dim); text-decoration: none; border-bottom: 1px solid var(--line); }
.langbar a:hover { color: var(--accent); border-color: var(--accent); }
.langbar .current { color: var(--accent); }

.caption { font-size: 14px; color: var(--ink-faint); margin: 10px 0 0; }
.note-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: 3px;
  padding: 16px 18px;
  margin: 0 0 22px;
  font-size: 15.5px;
  color: var(--ink-dim);
}
.note-box strong { color: var(--ink); }

/* ---------- anatomy diagram ---------- */
.anatomy {
  margin: 30px 0 40px;
  padding: 26px 22px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.anatomy svg { width: 100%; height: auto; display: block; }
.anatomy-legend { display: flex; flex-wrap: wrap; gap: 14px 22px; margin: 18px 0 0; font-size: 13.5px; color: var(--ink-dim); justify-content: center; }
.anatomy-legend span { display: inline-flex; align-items: center; gap: 7px; }
.anatomy-legend .sw { width: 12px; height: 12px; border-radius: 50%; display: inline-block; flex: none; }

/* ---------- generic panel ---------- */
.panel {
  margin: 36px 0 40px;
  padding: 26px 22px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.4);
}
.panel-caption { text-align: center; font-size: 14.5px; color: var(--ink-faint); margin: 0 0 22px; max-width: 560px; margin-left: auto; margin-right: auto; }
.panel h3 { text-align: center; margin-bottom: 4px; }

/* ---------- control stick ---------- */
.stick-row { display: flex; flex-direction: column; align-items: center; gap: 10px; margin: 4px 0 20px; }
.stick-track {
  position: relative;
  width: 100%;
  max-width: 360px;
  height: 54px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 27px;
  touch-action: none;
}
.stick-track::before {
  content: "";
  position: absolute;
  left: 50%; top: 8px; bottom: 8px;
  width: 2px;
  background: var(--line);
  transform: translateX(-50%);
}
.stick-zone-sub {
  position: absolute;
  top: 4px; bottom: 4px;
  left: 42%; right: 42%;
  background: rgba(87, 199, 194, 0.12);
  border-radius: 20px;
  pointer-events: none;
}
.stick-knob {
  position: absolute;
  top: 4px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #7a5a1e;
  left: 50%;
  transform: translateX(-50%);
  cursor: grab;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #1a1305;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 12px;
}
.stick-knob:active { cursor: grabbing; }
.stick-knob:focus-visible { outline: 3px solid var(--cyan); outline-offset: 2px; }
.stick-labels { display: flex; justify-content: space-between; width: 100%; max-width: 360px; font-size: 12.5px; color: var(--ink-faint); font-family: var(--mono); }

.btn-row { display: flex; justify-content: center; gap: 10px; margin: 4px 0 22px; flex-wrap: wrap; }
.btn {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 16px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--ink-dim);
  border-radius: 20px;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); color: var(--ink); }
.btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
.btn.primary { background: var(--accent); color: #1a1305; border-color: var(--accent); font-weight: 700; }
.btn.primary:hover { background: #f2b352; }
.btn:disabled { opacity: 0.5; cursor: default; }

/* ---------- dual dial ---------- */
.dial-wrap { display: flex; justify-content: center; margin: 6px 0 18px; }
.dial-wrap svg { width: 220px; height: 220px; max-width: 60vw; max-height: 60vw; }

.readouts { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 4px; overflow: hidden; margin: 0 0 20px; }
.readout { background: var(--panel-2); padding: 14px 12px; text-align: center; }
.readout .lbl { font-size: 12px; color: var(--ink-faint); display: block; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.05em; }
.readout .val { font-family: var(--mono); font-size: 20px; font-weight: 600; color: var(--ink); }
.readout .val.true { color: var(--cyan); }
.readout .val.felt { color: var(--accent); }
.readout .sub { display: block; font-size: 11px; color: var(--ink-faint); margin-top: 4px; }

.strip-wrap { margin: 0 0 8px; }
.strip-wrap canvas { width: 100%; height: 130px; display: block; background: var(--panel-2); border: 1px solid var(--line); border-radius: 4px; }
.strip-legend { display: flex; justify-content: center; gap: 22px; margin: 10px 0 0; font-size: 13px; color: var(--ink-dim); flex-wrap: wrap; }
.strip-legend span { display: inline-flex; align-items: center; gap: 7px; }
.strip-legend .sw { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }
.sw.true-c { background: var(--cyan); }
.sw.felt-c { background: var(--accent); }
.sw.thresh-c { background: rgba(87,199,194,0.35); height: 8px; }

.status-line { text-align: center; font-family: var(--mono); font-size: 13.5px; color: var(--ink-dim); min-height: 20px; margin: 4px 0 0; }
.status-line.alert { color: var(--danger); font-weight: 600; }
.status-line.calm { color: var(--cyan); }

/* ---------- cupula cutaway ---------- */
.cupula-wrap { display: flex; justify-content: center; margin: 22px 0 6px; }
.cupula-wrap svg { width: 100%; max-width: 380px; height: auto; }

/* ---------- graveyard spiral scenario ---------- */
.scenario-dials { display: flex; justify-content: center; gap: 28px; margin: 6px 0 18px; flex-wrap: wrap; }
.scenario-dial { text-align: center; }
.scenario-dial svg { width: 150px; height: 150px; border-radius: 50%; }
.scenario-dial .dlabel { font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); margin-top: 8px; text-transform: uppercase; letter-spacing: 0.05em; }

.alt-trace-wrap canvas { width: 100%; height: 90px; display: block; background: var(--panel-2); border: 1px solid var(--line); border-radius: 4px; }
.scenario-caption { text-align: center; font-size: 14.5px; color: var(--ink-dim); min-height: 44px; margin: 14px 0 6px; font-style: italic; font-family: var(--serif); }
.scenario-progress { height: 4px; background: var(--panel-2); border-radius: 2px; overflow: hidden; margin: 0 0 16px; }
.scenario-progress-fill { height: 100%; width: 0%; background: var(--accent); }
.scenario-clock { text-align: center; font-family: var(--mono); font-size: 12.5px; color: var(--ink-faint); margin: 0 0 4px; }

/* ---------- otolith vector demo ---------- */
.vector-wrap { display: flex; justify-content: center; margin: 8px 0 16px; }
.vector-wrap svg { width: 260px; height: 220px; max-width: 80vw; }
.slider-row { display: flex; flex-direction: column; align-items: center; gap: 8px; margin: 4px 0 18px; }
.slider-row input[type="range"] {
  width: 100%;
  max-width: 340px;
  accent-color: var(--accent);
}
.slider-row .slider-label { font-family: var(--mono); font-size: 13px; color: var(--ink-dim); }

/* ---------- family list ---------- */
.family-list { list-style: none; margin: 0 0 22px; padding: 0; display: grid; gap: 12px; }
.family-list li {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent-dim);
  border-radius: 3px;
  padding: 12px 16px;
  font-size: 15px;
  color: var(--ink-dim);
}
.family-list b { color: var(--ink); }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  margin: 8px 0 40px;
}
.stat { background: var(--panel); padding: 20px 14px; text-align: center; }
.stat .num { font-family: var(--mono); font-size: 23px; font-weight: 600; color: var(--accent); display: block; }
.stat .lbl { font-size: 12.5px; color: var(--ink-faint); margin-top: 6px; display: block; line-height: 1.4; }

.method {
  font-size: 14.5px;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
  padding-top: 20px;
  margin-top: 8px;
}
.method a { color: var(--ink-dim); }

.js-only { display: none; }
.js .js-only { display: block; }
.js .no-js-note { display: none; }
.js-only.inline { display: none; }
.js .js-only.inline { display: inline; }

.totop {
  position: fixed;
  right: 18px;
  bottom: 18px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 12px;
  padding: 9px 12px;
  border-radius: 20px;
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.totop.show { opacity: 1; pointer-events: auto; }
.totop:hover { color: var(--accent); border-color: var(--accent); }

footer.wrap { padding: 30px 22px 60px; font-size: 13.5px; color: var(--ink-faint); }
footer a { color: var(--ink-dim); }

@media (max-width: 560px) {
  h1 { font-size: 34px; }
  .deck { font-size: 19px; }
  body { font-size: 16.5px; }
  h2 { font-size: 24px; }
  .stats { grid-template-columns: 1fr; }
  .scenario-dials { gap: 16px; }
  .scenario-dial svg { width: 120px; height: 120px; }
  .readouts { grid-template-columns: 1fr 1fr; }
  .btn { font-size: 13px; padding: 9px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .totop { transition: none; }
}