@font-face {
  font-family: "Computer Modern Serif";
  src:
    url("https://cdn.jsdelivr.net/gh/dreampulse/computer-modern-web-font@master/font/Serif/cmunrm.woff")
      format("woff");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Computer Modern Serif";
  src:
    url("https://cdn.jsdelivr.net/gh/dreampulse/computer-modern-web-font@master/font/Serif/cmunbx.woff")
      format("woff");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper: #f8f9fa;
  --paper-subtle: #f8f9fa;
  --paper-deep: #f8f9fa;
  --ink: #1a1a1a;
  --ink-soft: #1a1a1a;
  --ink-faint: #1a1a1a;
  --line: #1a1a1a;
  --line-strong: #1a1a1a;
  --accent: #d52b1e;
  --accent-soft: #ffc72c;
  --accent-deep: #0033a0;
  --grid: #1a1a1a;
  --shadow: none;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--ink);
  font-family: "Computer Modern Serif", "Iowan Old Style", "Times New Roman", serif;
  background: var(--paper);
}

button,
input,
textarea,
select {
  font: inherit;
}

.lab-shell {
  width: min(1380px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 28px;
}

.lab-header {
  display: flex;
  gap: 18px;
  align-items: end;
  justify-content: space-between;
  padding: 0 2px 18px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.section-label {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--accent);
}

h1 {
  margin: 8px 0 0;
  font-size: clamp(2rem, 2.2vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.deck {
  max-width: 52rem;
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.55;
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

button {
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 0.8rem 1.2rem;
  cursor: pointer;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition:
    border-color 140ms ease,
    background-color 140ms ease,
    color 140ms ease,
    transform 140ms ease;
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.primary-action {
  border-color: var(--line);
  background: var(--accent-soft);
  color: var(--ink);
}

.primary-action:hover {
  border-color: var(--line);
  background: var(--accent);
  color: var(--paper);
}

.secondary-action {
  background: var(--paper);
  color: var(--ink-soft);
}

.secondary-action:hover {
  border-color: var(--line);
  background: var(--accent-deep);
  color: var(--paper);
}

.lab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(270px, 320px);
  gap: 20px;
  margin-top: 18px;
}

.stage-card,
.panel-block {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.stage-card {
  min-width: 0;
}

.stage-meta {
  display: flex;
  gap: 16px;
  align-items: start;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.section-label {
  color: var(--ink-faint);
}

.stage-note {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.5;
}

.stage-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.stage-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.38rem 0.62rem;
  background: var(--accent-soft);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.canvas-frame {
  position: relative;
  padding: 16px;
  background: var(--paper-subtle);
}

#game-canvas {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: block;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.canvas-overlay {
  position: absolute;
  inset: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--paper);
  z-index: 1;
  transition: opacity 160ms ease;
}

.canvas-overlay.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.canvas-overlay-card {
  width: min(100% - 40px, 420px);
  padding: 22px 24px;
  text-align: center;
  border: 1px solid var(--line);
  background: var(--paper-subtle);
}

.canvas-overlay-title {
  margin: 0 0 10px;
  font-size: 1.1rem;
  font-weight: 700;
}

.canvas-overlay-text {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.55;
}

.stage-footer {
  padding: 12px 18px 16px;
  border-top: 1px solid var(--line);
}

.footer-note {
  margin: 0;
  color: var(--ink-faint);
  font-size: 0.92rem;
  line-height: 1.5;
}

.instrument-panel {
  display: grid;
  gap: 14px;
  align-content: start;
}

.panel-block {
  padding: 16px;
}

.instruction-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.instruction-list p {
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  line-height: 1.45;
}

.instruction-list p:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.stats {
  margin: 12px 0 0;
}

.stats div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.stats div:last-child {
  border-bottom: 0;
}

.stats dt {
  color: var(--ink-soft);
}

.stats dd {
  margin: 0;
  color: var(--ink);
  font-family: "SFMono-Regular", "Menlo", "Monaco", "Courier New", monospace;
  font-size: 0.92rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.message-log {
  min-height: 154px;
  margin-top: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  background: var(--paper-subtle);
  color: var(--ink-soft);
  line-height: 1.55;
  white-space: pre-wrap;
}

@media (max-width: 1040px) {
  .lab-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .lab-shell {
    width: min(100% - 20px, 1380px);
    padding-top: 14px;
  }

  .lab-header,
  .stage-meta {
    flex-direction: column;
    align-items: start;
  }

  .header-actions,
  .stage-tags {
    justify-content: flex-start;
  }

  .header-actions {
    width: 100%;
  }

  .header-actions button {
    flex: 1 1 12rem;
  }

  .canvas-frame {
    padding: 10px;
  }

  .canvas-overlay {
    inset: 10px;
  }
}