/* CORIDIS — Night Dial
   トークンはコンセプトブック ④「CSSトークン（草案）」に揃える。 */
:root {
  --cds-carbon: #0C0E11;
  --cds-graphite: #15181D;
  --cds-steel: #1E2228;
  --cds-hairline: #2E333B;
  --cds-bone: #ECE6D8;
  --cds-bone-dim: #C9C4B8;
  --cds-ash: #8F8C84;
  --cds-arteria: #FF3B2F;
  --cds-amber: #FFB224;
  --cds-brass: #C9A45C;
  --cds-flatline: #4A4F57;

  --rhythm-sinus: var(--cds-bone);
  --rhythm-arrhythmia: var(--cds-amber);
  --rhythm-fibrillation: var(--cds-arteria);
  --rhythm-arrest: var(--cds-flatline);

  --cds-font-display: "Michroma", sans-serif;
  --cds-font-ui: "IBM Plex Sans JP", "IBM Plex Sans", sans-serif;
  --cds-font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --cds-font-motto: "Cinzel", serif;

  --cds-radius-panel: 2px;
  --cds-radius-control: 4px;
  --container: 1200px;

  /* ロゴの芯の赤はライトとダークで変えない（文字に使う Arteria とは別） */
  --logo-core: #FF3B2F;
  --header-bg: rgba(12, 14, 17, 0.92);

  color-scheme: dark light;
}

/* Enamel Dial：時計の白エナメル文字盤。文字色はすべて背景に対して 4.5:1 以上 */
@media (prefers-color-scheme: light) {
  :root {
    --cds-carbon: #F4F1EA;
    --cds-graphite: #FBF9F4;
    --cds-steel: #ECE8DF;
    --cds-hairline: #D8D3C8;
    --cds-bone: #14161A;
    --cds-bone-dim: #3F4248;
    --cds-ash: #6B6860;
    --cds-arteria: #C8241A;
    --cds-amber: #8F5D00;
    --cds-brass: #7F6226;
    --cds-flatline: #A7A39A;

    --header-bg: rgba(244, 241, 234, 0.92);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--cds-carbon);
  color: var(--cds-bone);
  font-family: var(--cds-font-ui);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
h1, h2, h3, p, ol, ul { margin: 0; }

a { color: var(--cds-bone); text-decoration: none; }
a:hover { color: var(--cds-arteria); }
a:focus-visible, .button:focus-visible {
  outline: 2px solid var(--cds-arteria);
  outline-offset: 3px;
}

.skip {
  position: absolute; left: 16px; top: -48px;
  padding: 8px 12px; background: var(--cds-bone); color: var(--cds-carbon);
  border-radius: var(--cds-radius-control); z-index: 10;
}
.skip:focus { top: 16px; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 16px; }
.stack { display: flex; flex-direction: column; gap: 40px; }

/* ---------- type ---------- */
.eyebrow, .label {
  font-family: var(--cds-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cds-ash);
}
.section-title {
  font-family: var(--cds-font-display);
  font-weight: 400;
  font-size: 28px;
  line-height: 1.3;
  letter-spacing: 0.04em;
  margin-top: 16px;
}
.muted { color: var(--cds-ash); }
.muted-strong { color: var(--cds-bone-dim); }
.motto {
  font-family: var(--cds-font-motto);
  font-size: 15px;
  letter-spacing: 0.2em;
  color: var(--cds-brass);
}

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: var(--header-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--cds-hairline);
}
.header-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 4px 32px; padding-top: 8px; padding-bottom: 8px;
}
.brand { display: flex; align-items: center; min-height: 44px; }
.nav {
  display: flex; flex-wrap: wrap; gap: 0 24px;
  font-family: var(--cds-font-mono); font-size: 11px; letter-spacing: 0.14em;
}
.nav a { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; }

/* ---------- status lamps ----------
   Pulse Lamp。状態は色だけでなく形と点滅の速さでも区別する。
   状態不明（データなし）＝薄い中空 / SINUS＝中空リング / ARRHYTHMIA＝琥珀の塗り・0.5Hz
   FIBRILLATION＝赤の塗り・2Hz / ARREST＝灰色に横線 */
.pulse-lamp {
  position: relative;
  width: 8px; height: 8px; border-radius: 50%;
  border: 1.5px solid var(--cds-flatline);
  flex: none;
}
[data-organ][data-rhythm="SINUS"] .pulse-lamp { border-color: var(--rhythm-sinus); }
[data-organ][data-rhythm="ARRHYTHMIA"] .pulse-lamp {
  border-color: var(--rhythm-arrhythmia); background: var(--rhythm-arrhythmia);
  animation: blink 2s steps(1, end) infinite;
}
[data-organ][data-rhythm="FIBRILLATION"] .pulse-lamp {
  border-color: var(--rhythm-fibrillation); background: var(--rhythm-fibrillation);
  animation: blink 500ms steps(1, end) infinite;
}
[data-organ][data-rhythm="ARREST"] .pulse-lamp { border-color: var(--rhythm-arrest); }
[data-organ][data-rhythm="ARREST"] .pulse-lamp::after {
  content: ""; position: absolute; left: -3px; right: -3px; top: 50%;
  height: 1.5px; margin-top: -0.75px; background: var(--rhythm-arrest);
}
[data-organ][data-rhythm="ARREST"] { color: var(--cds-ash); }
@keyframes blink { 50% { opacity: 0.25; } }

/* ---------- sections ---------- */
.section { border-bottom: 1px solid var(--cds-hairline); padding: 96px 0; }

.hero { padding: 80px 0 72px; }
.hero-inner { display: flex; flex-wrap: wrap-reverse; align-items: center; gap: 48px; }
.hero-copy { flex: 999 1 520px; min-width: 0; display: flex; flex-direction: column; gap: 28px; }
.hero-title {
  font-family: var(--cds-font-display);
  font-weight: 400;
  font-size: clamp(32px, 5vw, 60px);
  line-height: 1.15;
  letter-spacing: 0.02em;
}
.lead { max-width: 560px; font-size: 17px; color: var(--cds-bone-dim); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 22px;
  border: 1px solid var(--cds-flatline); border-radius: var(--cds-radius-control);
  font-family: var(--cds-font-mono); font-size: 13px; letter-spacing: 0.08em;
}
.button-primary { background: var(--cds-bone); border-color: var(--cds-bone); color: var(--cds-carbon); }
.button-primary:hover { background: var(--cds-arteria); border-color: var(--cds-arteria); color: var(--cds-carbon); }

.hero-mark { flex: 1 1 300px; display: flex; justify-content: center; }
.hero-mark svg { width: 100%; max-width: 400px; height: auto; }
.hero-mark .dial { stroke: var(--cds-brass); }
.hero-mark .ring { stroke: var(--cds-bone); }
.hero-mark .core {
  fill: var(--logo-core);
  transform-box: fill-box;
  transform-origin: 0% 100%; /* 扇形の頂点から拍動する */
}
/* 心臓が打っているあいだだけ拍動する。Rhythm は pulse.js が <html data-rhythm> に置く */
[data-rhythm="SINUS"] .hero-mark .core,
[data-rhythm="ARRHYTHMIA"] .hero-mark .core { animation: lubdub 1.24s infinite; }
[data-rhythm="ARRHYTHMIA"] .hero-mark .core { fill: var(--rhythm-arrhythmia); }
[data-rhythm="FIBRILLATION"] .hero-mark .core { animation: lubdub 0.5s infinite; }
[data-rhythm="ARREST"] .hero-mark .ring { stroke: var(--rhythm-arrest); }
[data-rhythm="ARREST"] .hero-mark .core { fill: var(--rhythm-arrest); }
/* lub-dub：1.00→1.08→1.00 を2回、120ms間隔、約0.8秒休む */
@keyframes lubdub {
  0%, 14%, 30%, 100% { transform: scale(1); }
  7%, 23% { transform: scale(1.08); }
}

/* rhythm strip */
.rhythm { background: var(--cds-graphite); border-bottom: 1px solid var(--cds-hairline); }
.rhythm-inner {
  display: flex; flex-wrap: wrap; align-items: center; gap: 16px 40px;
  padding-top: 24px; padding-bottom: 24px;
}
.rhythm-state { display: flex; align-items: baseline; gap: 14px; }
.rhythm-value { font-family: var(--cds-font-display); font-size: 20px; letter-spacing: 0.04em; }
[data-rhythm="ARRHYTHMIA"] .rhythm-value { color: var(--rhythm-arrhythmia); }
[data-rhythm="FIBRILLATION"] .rhythm-value { color: var(--rhythm-fibrillation); }
[data-rhythm="ARREST"] .rhythm-value { color: var(--cds-ash); }
.rhythm-bpm { display: flex; align-items: baseline; gap: 6px; }
.mono-num { font-family: var(--cds-font-mono); font-size: 28px; font-variant-numeric: tabular-nums; }
.unit { font-family: var(--cds-font-mono); font-size: 13px; color: var(--cds-ash); }
.ecg { flex: 1 1 240px; min-width: 0; height: 40px; }
.ecg path { stroke: var(--cds-bone); }
.ecg circle { fill: var(--cds-arteria); }
.organs {
  list-style: none; padding: 0;
  display: flex; flex-wrap: wrap; gap: 8px 20px;
  font-family: var(--cds-font-mono); font-size: 11px; letter-spacing: 0.14em;
}
.organs li { display: flex; align-items: center; gap: 8px; }

/* split layout (aside + main) */
.split { display: flex; flex-wrap: wrap; gap: 48px; }
.split-aside { flex: 1 1 280px; display: flex; flex-direction: column; gap: 16px; }
.split-aside .section-title { margin-top: 0; }
.split-aside .motto { margin-top: 8px; }

/* codex */
.codex {
  flex: 999 1 560px; min-width: 0;
  list-style: none; padding: 0;
  border-top: 1px solid var(--cds-hairline);
}
.codex li { display: flex; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--cds-hairline); }
.codex p { color: var(--cds-ash); }
.codex strong { color: var(--cds-bone); font-weight: 500; }
.numeral { font-family: var(--cds-font-motto); color: var(--cds-brass); width: 36px; flex: none; }
.numeral-first { color: var(--cds-arteria); }

/* section head */
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 16px; }
.head-note { max-width: 460px; }

/* cards */
.cards { display: grid; gap: 8px; }
.cards-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.cards-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card {
  background: var(--cds-graphite);
  border: 1px solid var(--cds-hairline);
  border-radius: var(--cds-radius-panel);
  padding: 28px;
  display: flex; flex-direction: column; gap: 16px;
}
.card h3 { font-size: 20px; font-weight: 500; line-height: 1.4; }
.card .muted { font-size: 14px; }
.card-link { padding: 24px; gap: 12px; transition: border-color 60ms; }
.card-link:hover { color: var(--cds-bone); border-color: var(--cds-flatline); }
.card-link h3 { font-size: 18px; }
.card-meta {
  display: flex; justify-content: space-between; gap: 12px;
  font-family: var(--cds-font-mono); font-size: 11px; letter-spacing: 0.14em; color: var(--cds-ash);
}


/* footer */
.site-footer { padding: 56px 0 40px; }
.site-footer .stack { gap: 32px; }
.morse { width: 100%; height: 14px; }
.morse path { stroke: var(--cds-brass); }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; }
.fineprint { font-family: var(--cds-font-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--cds-ash); }

/* 404 */
.not-found {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 20px;
}
.not-found .section-title { margin-top: 0; }

@media (prefers-reduced-motion: reduce) {
  .pulse-lamp, [data-rhythm] .hero-mark .core { animation: none !important; }
}