:root {
  --night: #07090d;
  --iron: #171b20;
  --iron-high: #20262c;
  --paper: #eee8da;
  --muted: #c9c6bd;
  --brass: #d6aa52;
  --copper: #68b8ad;
  --signal: #c86455;
  --rule: #4a4d4f;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { font-size: 21px; background: var(--night); scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 85% 0%, rgba(104, 184, 173, 0.08), transparent 30rem),
    linear-gradient(110deg, rgba(214, 170, 82, 0.035), transparent 38rem),
    var(--night);
  color: var(--paper);
  font: 21px/1.55 "Atkinson Hyperlegible", Arial, sans-serif;
}
a { color: inherit; }
button, input { font: inherit; }
.skip-link {
  position: fixed;
  top: -8rem;
  left: 1rem;
  z-index: 30;
  padding: 0.75rem 1rem;
  background: var(--brass);
  color: var(--night);
  font-weight: 700;
}
.skip-link:focus { top: 1rem; }
:focus-visible { outline: 4px solid var(--copper); outline-offset: 5px; }
.history-shell { width: min(92vw, 76rem); margin: auto; padding: 1.2rem 0 4rem; }
.history-nav,
.instrument-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 2px solid var(--rule);
  padding: 0.7rem 0 1rem;
  font: 700 18px/1.3 "B612 Mono", "Courier New", monospace;
}
.history-nav div,
.instrument-nav div { display: flex; flex-wrap: wrap; gap: 1rem; }
.history-nav a,
.instrument-nav a {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  text-underline-offset: 0.28em;
  text-decoration-thickness: 2px;
}
.history-nav .brand,
.instrument-nav .brand { color: var(--brass); text-decoration: none; }
.room-hero { min-height: 66vh; display: grid; align-content: center; border-bottom: 2px solid var(--rule); padding: clamp(3rem, 8vw, 7rem) 0; }
.kicker {
  margin: 0 0 0.65rem;
  color: var(--copper);
  font: 700 18px/1.25 "B612 Mono", monospace;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.room-hero h1,
.instrument-shell h1 {
  margin: 0;
  font-family: Spectral, Georgia, serif;
  font-size: clamp(2.8rem, 7vw, 7rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.045em;
}
.room-time,
.instrument-time {
  display: block;
  margin-top: 1.2rem;
  color: var(--brass);
  font: 700 clamp(1.45rem, 3vw, 2.4rem)/1 "B612 Mono", monospace;
  font-variant-numeric: tabular-nums;
}
.room-philosophy,
.room-deck { max-width: 45rem; margin: 1.25rem 0 0; color: var(--muted); font-size: clamp(1rem, 1.8vw, 1.22rem); }
.room-philosophy { padding-left: 1rem; border-left: 5px solid var(--brass); }
.collection-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 2.8rem 0 1.4rem; }
.collection-head h2 { margin: 0; font: 700 clamp(2rem, 4vw, 3.6rem)/1 Spectral, Georgia, serif; }
.micro { color: var(--muted); font: 700 18px/1.3 "B612 Mono", monospace; }
.history-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; position: relative; }
.history-grid::before { content: ""; position: absolute; left: 4%; right: 4%; top: 50%; height: 3px; background: var(--brass); opacity: 0.36; }
.history-card {
  min-width: 0;
  min-height: 23rem;
  display: grid;
  grid-template-rows: 1fr auto;
  position: relative;
  z-index: 1;
  overflow: hidden;
  border: 2px solid var(--rule);
  border-radius: 0.3rem;
  background: rgba(23, 27, 32, 0.96);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}
.history-card:hover,
.history-card:focus-visible { transform: translateY(-0.25rem); border-color: var(--brass); background: var(--iron-high); }
.history-preview { min-height: 14rem; display: grid; place-items: center; position: relative; padding: 1.4rem; border-bottom: 2px solid var(--rule); }
.history-card-copy { padding: 1.15rem 1.25rem 1.35rem; }
.history-card h3 { margin: 0 0 0.35rem; font: 700 1.55rem/1.05 Spectral, Georgia, serif; }
.history-card p { margin: 0; color: var(--muted); }
.history-index { position: absolute; top: 0.8rem; left: 0.9rem; z-index: 3; color: var(--brass); font: 700 18px/1 "B612 Mono", monospace; }
.instrument-shell { padding: clamp(2.5rem, 6vw, 5.5rem) 0; }
.instrument-stage { margin-top: 2rem; padding: clamp(1rem, 3vw, 2.2rem); border: 2px solid var(--rule); background: rgba(23, 27, 32, 0.82); }
.reading-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.8rem; margin-top: 1.2rem; }
.reading { border-top: 2px solid var(--rule); padding-top: 0.75rem; }
.reading strong { display: block; color: var(--muted); font: 700 18px/1.25 "B612 Mono", monospace; text-transform: uppercase; letter-spacing: 0.08em; }
.reading span, .reading time, output { display: block; margin-top: 0.4rem; color: var(--brass); font: 700 clamp(1.15rem, 2.4vw, 1.7rem)/1.2 "B612 Mono", monospace; font-variant-numeric: tabular-nums; }
.instrument-status { min-height: 1.6em; margin: 0.8rem 0 0; color: var(--muted); font-size: 18px; }
.control-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.25rem; }
.control-row button,
.control-row a.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  border: 2px solid var(--brass);
  border-radius: 99rem;
  background: var(--brass);
  color: var(--night);
  padding: 0.65rem 1rem;
  font: 700 18px/1 "B612 Mono", monospace;
  cursor: pointer;
}
.control-row button.secondary { background: transparent; color: var(--paper); border-color: var(--rule); }
.history-note { max-width: 49rem; margin-top: 2.6rem; padding: 1.35rem 1.5rem 1.5rem; border-left: 6px solid var(--brass); background: rgba(23, 27, 32, 0.7); }
.history-note h2 { margin: 0 0 0.6rem; font: 700 clamp(1.8rem, 3.2vw, 2.6rem)/1 Spectral, Georgia, serif; }
.history-copy { margin: 0; color: var(--muted); }
.history-source { display: inline-block; min-height: 48px; margin-top: 0.7rem; color: var(--copper); font: 700 18px/1.3 "B612 Mono", monospace; text-underline-offset: 0.28em; }
.clock-traverse { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; margin-top: 2.3rem; padding-top: 1.1rem; border-top: 2px solid var(--rule); }
.clock-traverse a { min-height: 48px; display: inline-flex; align-items: center; color: var(--copper); font: 700 18px/1.3 "B612 Mono", monospace; text-underline-offset: 0.28em; }
.clock-traverse a:last-child { justify-self: end; text-align: right; }
.room-footer { margin-top: 3rem; padding-top: 1.3rem; border-top: 2px solid var(--rule); color: var(--muted); }

@media (max-width: 980px) {
  .history-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .history-shell { width: min(90vw, 34rem); }
  .history-nav, .instrument-nav { align-items: flex-start; flex-direction: column; }
  .history-grid, .reading-grid { grid-template-columns: 1fr; }
  .history-grid::before { top: 2%; bottom: 2%; left: 1.2rem; width: 3px; height: auto; right: auto; }
  .history-card { min-height: 21rem; }
  .collection-head { display: block; }
  .collection-head .micro { display: block; margin-top: 0.65rem; }
  .clock-traverse { grid-template-columns: 1fr 1fr; }
  .clock-traverse a:nth-child(2) { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}