:root {
  --paper: #f0ebe3;
  --paper-deep: #e7e0d4;
  --cream: #f7f3ec;
  --ink: #2f2b25;
  --ink-2: #5c564c;
  --ink-3: #8a8378;
  --line: #ddd5c8;
  --line-strong: #cfc6b6;
  --sage: #5e7a64;
  --sage-deep: #3f5a47;
  --sage-soft: #d7e2d6;
  --clay: #c57b52;
  --gold: #a6853a;
  --shadow: 0 18px 40px rgba(47, 43, 37, 0.06);
  --radius: 22px;
  --sans: "Figtree", system-ui, sans-serif;
  --serif: "Newsreader", Georgia, serif;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

html {
  color-scheme: light;
}

body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #f7f1e6 0%, transparent 55%),
    radial-gradient(900px 500px at 110% 0%, #e7eee4 0%, transparent 50%),
    var(--paper);
  line-height: 1.5;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 40;
  opacity: 0.045;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.top,
main,
footer {
  width: min(1180px, calc(100% - 32px));
  margin-inline: auto;
}

.top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.brand span {
  font-family: var(--serif);
  font-size: 1.7rem;
  font-style: italic;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.mark {
  width: 28px;
  height: 28px;
  color: var(--sage-deep);
}

.lede {
  margin: 0;
  max-width: 38ch;
  color: var(--ink-2);
  font-size: 0.98rem;
  text-align: right;
}

.stage {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 16px;
}

.panel {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.7);
  overflow: hidden;
  min-height: 420px;
  display: flex;
  flex-direction: column;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 16px 20px 0;
}

.panel-head h2,
.notes h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.28rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.phase {
  margin: 0;
  color: var(--ink-3);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

canvas {
  display: block;
  width: 100%;
  flex: 1 1 auto;
  height: 380px;
  min-height: 300px;
  cursor: default;
}

.bench {
  margin-top: 16px;
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.7);
  padding: 18px 20px 16px;
}

.readouts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.readouts > div {
  padding: 4px 8px 8px 0;
  border-right: 1px solid var(--line);
}

.readouts > div:last-child {
  border-right: none;
}

.readouts dt,
.speed span {
  color: var(--ink-3);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.readouts dd {
  margin: 2px 0 0;
  font-family: var(--serif);
  font-size: 1.85rem;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.readouts small {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--ink-3);
}

.hint {
  margin: 4px 0 0;
  color: var(--ink-3);
  font-size: 0.8rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  margin-top: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.btn {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: #fbf8f2;
  color: var(--ink);
  font: 600 0.92rem var(--sans);
  padding: 10px 16px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn svg {
  width: 16px;
  height: 16px;
}

.btn:hover {
  border-color: #bfb5a4;
  background: #fffaf2;
}

.btn:focus-visible,
.switch input:focus-visible + .track,
.speed input:focus-visible {
  outline: 2px solid var(--sage);
  outline-offset: 3px;
}

.btn.primary {
  background: var(--sage-deep);
  border-color: var(--sage-deep);
  color: #f4efe6;
}

.btn.primary:hover {
  background: #334a3a;
  border-color: #334a3a;
}

.btn.primary[aria-pressed="true"] {
  background: var(--clay);
  border-color: var(--clay);
}

.switch {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  margin-left: 6px;
}

.switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.track {
  width: 44px;
  height: 26px;
  border-radius: 999px;
  background: #d8d0c3;
  position: relative;
  flex: none;
  transition: background 0.25s ease;
}

.track::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fbf8f2;
  top: 3px;
  left: 3px;
  box-shadow: 0 1px 3px rgba(47, 43, 37, 0.2);
  transition: transform 0.25s ease;
}

.switch input:checked + .track {
  background: var(--sage);
}

.switch input:checked + .track::after {
  transform: translateX(18px);
}

.switch-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.switch-copy strong {
  font-size: 0.92rem;
  font-weight: 650;
}

.switch-copy em {
  font-style: normal;
  color: var(--ink-3);
  font-size: 0.78rem;
}

.speed {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-2);
  font-size: 0.85rem;
}

.speed input {
  accent-color: var(--sage);
  width: 120px;
}

.notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 22px 0 8px;
}

.notes article {
  padding: 18px 18px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--cream) 70%, transparent);
}

.n {
  display: block;
  color: var(--gold);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  margin-bottom: 10px;
}

.notes p {
  margin: 8px 0 0;
  color: var(--ink-2);
  font-size: 0.95rem;
}

.notes em {
  font-family: var(--serif);
  font-style: italic;
}

footer {
  padding: 10px 0 36px;
}

footer p {
  color: var(--ink-3);
  font-size: 0.82rem;
  max-width: 78ch;
}

kbd {
  font-family: var(--sans);
  font-size: 0.75rem;
  border: 1px solid var(--line-strong);
  background: var(--cream);
  padding: 1px 6px;
  border-radius: 6px;
}

@media (max-width: 900px) {
  .panel-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .stage,
  .readouts,
  .notes {
    grid-template-columns: 1fr;
  }

  .readouts > div {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding-bottom: 12px;
  }

  .readouts > div:last-child {
    border-bottom: none;
  }

  .lede {
    text-align: left;
  }

  .top {
    flex-direction: column;
    gap: 8px;
  }

  .speed {
    margin-left: 0;
    width: 100%;
  }

  .panel {
    min-height: 340px;
  }
}

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