@font-face {
  font-family: "IBM Plex Mono";
  src: url("assets/IBMPlexMono-Regular.81fc864103e7.woff2") format("woff2");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("assets/AtkinsonHyperlegibleNext.abde1ad5cf78.woff2") format("woff2");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-sans: "Atkinson Hyperlegible", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Theme: Light Mode (default) */
  --bg-canvas: #f2f4f8;
  --bg-surface: #ffffff;
  --bg-sunken: #e5e9f2;
  --bg-tape: #141b24;
  --border-subtle: #cbd5e1;
  --border-strong: #94a3b8;
  --border-tape: #2d3748;

  --text-primary: #090d16;
  --text-secondary: #273444;
  --text-muted: #526071;
  --text-tape: #e2e8f0;
  --text-tape-muted: #718096;

  --accent-amber: #b45309;
  --accent-amber-bg: #fef3c7;
  --accent-amber-glow: rgba(217, 119, 6, 0.25);

  --accent-cyan: #0369a1;
  --accent-cyan-bg: #e0f2fe;
  --accent-cyan-glow: rgba(2, 132, 199, 0.25);

  --focus-ring: #0284c7;
  --shadow-panel: 0 4px 16px rgba(15, 23, 42, 0.08);
}

html[data-theme="dark"] {
  --bg-canvas: #090d14;
  --bg-surface: #121926;
  --bg-sunken: #0b1019;
  --bg-tape: #06090e;
  --border-subtle: #242f42;
  --border-strong: #3b4961;
  --border-tape: #1e2838;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #8899ac;
  --text-tape: #f1f5f9;
  --text-tape-muted: #64748b;

  --accent-amber: #fbbf24;
  --accent-amber-bg: rgba(251, 191, 36, 0.15);
  --accent-amber-glow: rgba(251, 191, 36, 0.35);

  --accent-cyan: #38bdf8;
  --accent-cyan-bg: rgba(56, 189, 248, 0.15);
  --accent-cyan-glow: rgba(56, 189, 248, 0.35);

  --focus-ring: #38bdf8;
  --shadow-panel: 0 8px 24px rgba(0, 0, 0, 0.45);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Header & Top navigation */
.site-header {
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.brand-link {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.5px;
}

.brand-link:hover {
  text-decoration: underline;
}

.controls-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.control-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  background-color: var(--bg-sunken);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.control-btn:hover {
  background-color: var(--border-subtle);
  color: var(--text-primary);
}

.control-btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* Main Layout */
main {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.hero {
  margin-bottom: 24px;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-amber);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 6px;
}

.hero-title {
  font-size: clamp(1.8rem, 4.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.hero-deck {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 720px;
  line-height: 1.5;
}

/* The Instrument Console */
.instrument-console {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-strong);
  border-radius: 12px;
  box-shadow: var(--shadow-panel);
  padding: 24px;
  margin-bottom: 36px;
}

/* Scoreboard */
.scoreboard-bay {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 20px;
}

.round-tracker {
  display: flex;
  flex-direction: column;
}

.tracker-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.tracker-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.score-display {
  display: flex;
  align-items: center;
  gap: 20px;
}

.score-cell {
  text-align: center;
}

.score-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.score-title.machine {
  color: var(--accent-amber);
}

.score-title.player {
  color: var(--accent-cyan);
}

.score-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
}

.score-vs {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-muted);
}

/* Signal Lamps & Status */
.status-bay {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  background-color: var(--bg-sunken);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 10px 16px;
  margin-bottom: 24px;
  text-align: center;
}

.lamp-indicator {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.lamp-bulb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid currentColor;
  background-color: transparent;
  flex-shrink: 0;
  transition: background-color 0.2s, box-shadow 0.2s;
}

.lamp-indicator.idle {
  color: var(--text-muted);
}
.lamp-indicator.idle .lamp-bulb {
  background-color: transparent;
}

.lamp-indicator.machine-win {
  color: var(--accent-amber);
}
.lamp-indicator.machine-win .lamp-bulb {
  background-color: var(--accent-amber);
  box-shadow: 0 0 10px var(--accent-amber);
}

.lamp-indicator.player-win {
  color: var(--accent-cyan);
}
.lamp-indicator.player-win .lamp-bulb {
  background-color: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

/* Action Controls Bay */
.actions-bay {
  margin-bottom: 28px;
}

.actions-prompt {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 12px;
}

.choice-buttons-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 480px;
  margin: 0 auto;
}

.btn-choice {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 3px solid var(--border-strong);
  border-radius: 12px;
  padding: 18px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  box-shadow: 0 4px 0 var(--border-strong);
  transition: transform 0.08s, box-shadow 0.08s, background-color 0.15s, border-color 0.15s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn-choice:hover:not(:disabled) {
  border-color: var(--text-primary);
  box-shadow: 0 4px 0 var(--text-primary);
  background-color: var(--bg-sunken);
}

.btn-choice:active:not(:disabled) {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--text-primary);
}

.btn-choice:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

.btn-choice:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-choice-symbol {
  font-family: var(--font-mono);
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1;
}

.btn-choice-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* Punch Tape Channel */
.tape-chassis {
  background-color: var(--bg-tape);
  border: 2px solid var(--border-tape);
  border-radius: 8px;
  padding: 14px 10px;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) var(--bg-tape);
}

.tape-container {
  display: flex;
  gap: 8px;
  min-width: max-content;
  padding: 4px 8px;
}

.tape-cell {
  width: 58px;
  height: 120px;
  background-color: #1a2230;
  border: 1px solid #2d3748;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px;
  position: relative;
  transition: border-color 0.2s, background-color 0.2s;
}

.tape-cell.active {
  border-color: var(--accent-amber);
  background-color: #232d3f;
}

.tape-cell.active::before {
  content: "▼";
  position: absolute;
  top: -16px;
  font-size: 10px;
  color: var(--accent-amber);
}

.cell-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-tape-muted);
}

.cell-channels {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.channel-socket {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid #4a5568;
  background-color: #0b0f15;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: #718096;
}

.channel-socket.punched {
  background-color: #f8fafc;
  color: #090d16;
  border-color: #f8fafc;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.4);
}

.cell-result-pip {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: #2d3748;
}

.cell-result-pip.machine {
  background-color: var(--accent-amber);
  box-shadow: 0 0 6px var(--accent-amber);
}

.cell-result-pip.player {
  background-color: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

.tape-legend {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-tape-muted);
  flex-wrap: wrap;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.legend-dot.amber { background-color: var(--accent-amber); }
.legend-dot.cyan { background-color: var(--accent-cyan); }
.legend-dot.hole { background-color: #f8fafc; }

/* Final Verdict Panel */
.verdict-panel {
  margin-top: 24px;
  padding: 24px;
  background-color: var(--bg-sunken);
  border: 2px solid var(--border-strong);
  border-radius: 10px;
}

.verdict-header {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-amber);
  margin-bottom: 6px;
}

.verdict-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.metric-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 14px;
}

.metric-card-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.metric-card-val {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.metric-card-benchmark {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.verdict-narrative {
  background-color: var(--bg-surface);
  border-left: 4px solid var(--accent-amber);
  padding: 14px 18px;
  border-radius: 0 6px 6px 0;
  font-size: 0.96rem;
  color: var(--text-primary);
  margin-bottom: 20px;
  line-height: 1.5;
}

.verdict-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-primary {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  background-color: var(--text-primary);
  color: var(--bg-surface);
  border: 2px solid var(--text-primary);
  border-radius: 8px;
  padding: 10px 18px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.08s;
}

.btn-primary:hover {
  opacity: 0.9;
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.btn-secondary {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  background-color: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-strong);
  border-radius: 8px;
  padding: 10px 18px;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}

.btn-secondary:hover {
  background-color: var(--bg-surface);
  border-color: var(--text-primary);
}
.btn-secondary:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* Editorial & Explanation Section */
.editorial-section {
  max-width: 720px;
  margin: 48px auto 0;
}

.editorial-section h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 32px 0 12px;
}

.editorial-section h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 24px 0 10px;
}

.editorial-section p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.65;
}

.editorial-section ul {
  margin: 0 0 20px 24px;
  color: var(--text-secondary);
}

.editorial-section li {
  margin-bottom: 8px;
  font-size: 1rem;
}

.editorial-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 18px 20px;
  margin: 24px 0;
}

.editorial-box-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-amber);
  margin-bottom: 6px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  padding: 32px 20px;
  margin-top: auto;
}

.footer-container {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-nav {
  display: flex;
  gap: 16px;
  list-style: none;
}

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-nav a:hover {
  text-decoration: underline;
  color: var(--text-primary);
}

/* Accessibility & Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Mobile adjustments (390px) */
@media (max-width: 600px) {
  .scoreboard-bay {
    justify-content: center;
  }
  .score-display {
    gap: 14px;
  }
  .choice-buttons-row {
    gap: 12px;
  }
  .btn-choice {
    padding: 14px 8px;
  }
  .btn-choice-symbol {
    font-size: 2.2rem;
  }
  .instrument-console {
    padding: 16px;
  }
  .verdict-panel {
    padding: 16px;
  }
}