@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&family=IBM+Plex+Mono:wght@300;400;500&display=swap');

/* ============================================================
   FUZZBOX PHYSICS — Shared Lab Styles
   Clean typographic design inspired by DMA / academic sites
   ============================================================ */

:root {
  --text: #f5f5f7;
  --text-secondary: #86868b;
  --text-tertiary: #6e6e73;
  --bg: #000000;
  --border: #333;
  --border-light: #222;
  --accent: #e8803a;
  --accent-hover: #f09a50;
  --canvas-bg: #0a0a0a;
  --red: #cc3333;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 300;
  font-size: 14px;
  min-height: 100vh;
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ---- Typography ---- */

h1 {
  font-family: 'Roboto', sans-serif;
  font-size: 2.8rem;
  font-weight: 300;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h2 {
  font-family: 'Roboto', sans-serif;
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 12px;
}

.subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  margin-top: 6px;
  text-transform: uppercase;
}

/* ---- Layout ---- */

header {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

header .top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.section {
  margin-bottom: 32px;
}

.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-rule {
  border: none;
  border-top: 1px solid var(--border-light);
  margin: 32px 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ---- Panels (used in some labs) ---- */

.panel {
  margin-bottom: 24px;
}

.panel-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* ---- Canvas ---- */

canvas {
  width: 100%;
  display: block;
  border: 1px solid var(--border-light);
  background: var(--canvas-bg);
}

canvas.scope-large { height: 200px; }

/* ---- Controls ---- */

.knob-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 64px;
}

.knob-label {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  text-align: center;
  text-transform: uppercase;
}

.knob-value {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text);
  min-width: 48px;
  text-align: center;
  padding: 1px 4px;
}

.controls-row {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  flex-wrap: wrap;
  align-items: flex-end;
}

input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  height: 2px;
  background: var(--border-light);
  border-radius: 1px;
  outline: none;
  cursor: pointer;
  max-width: 140px;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--text);
  cursor: pointer;
}

input[type=range].amber::-webkit-slider-thumb {
  background: var(--accent);
}

/* ---- Buttons ---- */

button {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  cursor: pointer;
  transition: all 0.15s;
  text-transform: uppercase;
}

button:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text);
  border-color: var(--text);
}

button.active {
  background: rgba(255,255,255,0.12);
  color: var(--text);
  border-color: var(--text);
}

button.amber-btn {
  border-color: var(--accent);
  color: var(--accent);
}

button.amber-btn:hover, button.amber-btn.active {
  background: rgba(232,128,58,0.15);
  color: var(--accent);
  border-color: var(--accent);
}

.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }

/* ---- Links ---- */

a.nav-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  transition: color 0.15s;
}

a.nav-link:hover { color: var(--accent-hover); }

/* ---- Drop zone ---- */

.drop-zone {
  border: 1px dashed var(--border-light);
  padding: 40px 20px;
  text-align: center;
  transition: all 0.2s;
  cursor: pointer;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(232,128,58,0.05);
}

.drop-zone-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---- Progress ---- */

.progress-bar {
  height: 2px;
  background: var(--border-light);
  overflow: hidden;
  margin-top: 12px;
  display: none;
}

.progress-bar-fill {
  height: 100%;
  background: var(--text);
  width: 0%;
  transition: width 0.1s;
}

/* ---- Stats / readouts ---- */

.stats {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: 10px;
}

.stats span { color: var(--text); font-weight: 400; }

/* ---- Status bar ---- */

.status-bar {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-align: right;
  line-height: 1.8;
}

.status-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border-light);
  margin-right: 6px;
  transition: all 0.3s;
}

.status-dot.active { background: var(--text); }

/* ---- Explanatory text ---- */

.explanation {
  font-family: 'Roboto', sans-serif;
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.8;
  border-left: 2px solid var(--border-light);
  padding: 0 0 0 20px;
  margin-top: 12px;
}

.explanation strong { color: var(--text); font-weight: 600; }

/* ---- Recording animation ---- */

.recording { animation: rec-blink 0.5s infinite alternate; }
@keyframes rec-blink {
  from { border-color: var(--red); color: var(--red); }
  to { border-color: var(--text-secondary); color: var(--text-secondary); }
}

/* ---- Responsive ---- */

@media (max-width: 700px) {
  h1 { font-size: 2rem; }
  body { padding: 20px 16px; }
  canvas { height: 200px; }
  .grid-2 { grid-template-columns: 1fr; }
}