/* Action Potential 3D - Styles
 * Myelinated vs Unmyelinated Neuron Visualization
 */

:root {
  --bg: #0b0f17;
  --bg-2: #0f1624;
  --bg-3: #141b2e;
  --text: #e6edf3;
  --muted: #9fb0c3;
  --accent: #7ae1ff;
  --accent-2: #ffb86b;
  --danger: #ff6b6b;
  --success: #51cf66;
  --inhibit: #9b59b6;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: radial-gradient(1200px 800px at 20% 10%, #0e1522 0%, var(--bg) 50%, #060a11 100%);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
}

#canvas-container {
  width: 100%;
  height: 100vh;
  position: relative;
  cursor: grab;
}

#canvas-container:active { cursor: grabbing; }

.controls-panel {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 300px;
  background: rgba(15, 22, 36, 0.95);
  border: 1px solid rgba(122, 225, 255, 0.3);
  border-radius: 12px;
  padding: 15px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  backdrop-filter: blur(10px);
  font-size: 12px;
}

.voltmeter {
  position: absolute;
  top: 20px;
  left: 20px;
  background: rgba(15, 22, 36, 0.95);
  border: 2px solid var(--accent);
  border-radius: 12px;
  padding: 15px;
  min-width: 220px;
  backdrop-filter: blur(10px);
}

.voltmeter-title {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.voltage-display {
  font-size: 42px;
  font-weight: 700;
  color: var(--accent);
  font-family: 'Courier New', monospace;
  text-align: center;
  text-shadow: 0 0 20px rgba(122, 225, 255, 0.5);
}

.voltage-bar {
  width: 100%;
  height: 24px;
  background: linear-gradient(90deg, var(--danger) 0%, var(--accent-2) 50%, var(--success) 100%);
  border-radius: 4px;
  position: relative;
  margin-top: 8px;
}

.voltage-indicator {
  position: absolute;
  top: -4px;
  width: 4px;
  height: 32px;
  background: white;
  box-shadow: 0 0 10px white;
  transition: left 0.05s;
}

.phase-label {
  text-align: center;
  margin-top: 8px;
  font-size: 13px;
  color: var(--accent-2);
  font-weight: 600;
  text-transform: uppercase;
}

.refractory-indicator {
  margin-top: 8px;
  padding: 6px;
  border-radius: 4px;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
}

.legend {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(15, 22, 36, 0.95);
  border: 1px solid rgba(122, 225, 255, 0.3);
  border-radius: 12px;
  padding: 12px;
  backdrop-filter: blur(10px);
  font-size: 11px;
}

.legend-item {
  display: flex;
  align-items: center;
  margin: 5px 0;
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  margin-right: 8px;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

h2 {
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(122, 225, 255, 0.3);
  padding-bottom: 8px;
}

.button-group {
  display: flex;
  gap: 6px;
  margin-bottom: 15px;
}

button {
  flex: 1;
  padding: 10px;
  background: linear-gradient(135deg, rgba(122, 225, 255, 0.2), rgba(122, 225, 255, 0.1));
  border: 1px solid rgba(122, 225, 255, 0.4);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  transition: all 0.2s;
}

button:hover {
  background: linear-gradient(135deg, rgba(122, 225, 255, 0.35), rgba(122, 225, 255, 0.2));
  transform: translateY(-1px);
}

button.active {
  background: linear-gradient(135deg, var(--success), rgba(81, 207, 102, 0.8));
  border-color: var(--success);
}

button.excite {
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.3), rgba(255, 107, 107, 0.15));
  border-color: var(--danger);
}

button.inhibit {
  background: linear-gradient(135deg, rgba(155, 89, 182, 0.3), rgba(155, 89, 182, 0.15));
  border-color: var(--inhibit);
}

.control-group {
  margin: 12px 0;
}

.control-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 11px;
}

.control-value {
  color: var(--accent);
  font-weight: 700;
  font-family: 'Courier New', monospace;
}

input[type="range"] {
  width: 100%;
  height: 5px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--bg-3), var(--accent));
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(122, 225, 255, 0.5);
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.info-box {
  background: rgba(255, 184, 107, 0.1);
  border-left: 3px solid var(--accent-2);
  padding: 8px;
  margin: 12px 0;
  border-radius: 4px;
  font-size: 10px;
  line-height: 1.4;
}

.back-link {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 16px;
  background: rgba(122, 225, 255, 0.15);
  border: 1px solid rgba(122, 225, 255, 0.3);
  border-radius: 6px;
  color: var(--accent);
  text-decoration: none;
  font-size: 12px;
  transition: all 0.2s;
  z-index: 100;
}

.back-link:hover {
  background: rgba(122, 225, 255, 0.25);
}

.stats {
  font-size: 10px;
  color: var(--muted);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(122, 225, 255, 0.2);
}

.stats div { margin: 4px 0; }

.click-hint {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 22, 36, 0.9);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 11px;
  color: var(--muted);
  border: 1px solid rgba(122, 225, 255, 0.2);
}

.section-divider {
  height: 1px;
  background: rgba(122, 225, 255, 0.2);
  margin: 15px 0;
}

.comparison-panel {
  position: absolute;
  bottom: 20px;
  right: 20px;
  width: 320px;
  background: rgba(15, 22, 36, 0.95);
  border: 1px solid rgba(122, 225, 255, 0.3);
  border-radius: 12px;
  padding: 15px;
  backdrop-filter: blur(10px);
  font-size: 12px;
}

.comparison-panel h3 {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 10px;
  border-bottom: 1px solid rgba(122, 225, 255, 0.3);
  padding-bottom: 6px;
}

.neuron-label {
  display: flex;
  align-items: center;
  margin: 6px 0;
  font-size: 11px;
}

.neuron-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 8px;
}

.myelin-legend {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(122, 225, 255, 0.2);
}

.myelin-legend-item {
  display: flex;
  align-items: center;
  margin: 4px 0;
  font-size: 10px;
}

.myelin-color {
  width: 20px;
  height: 8px;
  margin-right: 8px;
  border-radius: 2px;
}