/* Membrane Molecular - Styles
 * Molecular-scale visualization of axon hillock membrane patch
 */

:root {
  --bg: #050810;
  --bg-2: #0a0f1a;
  --bg-3: #101828;
  --text: #e8f0f8;
  --muted: #8ba3b8;
  --accent: #00d4ff;
  --accent-2: #ff7b4a;
  --danger: #ff4757;
  --success: #26de81;
  --warning: #fed330;
  --purple: #a55eea;
  
  /* Molecular colors */
  --lipid-head: #4a9eff;
  --lipid-tail: #2d5a87;
  --cholesterol: #ffd93d;
  --na-channel: #ff6b6b;
  --na-channel-open: #ff3838;
  --k-channel: #ffd93d;
  --k-channel-open: #ffb300;
  --pump: #9b59b6;
  --na-ion: #ff4757;
  --k-ion: #fed330;
  --cl-ion: #3867d6;
  --atp: #26de81;
  --water: #74b9ff;
}

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

body {
  font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', Monaco, monospace;
  background: radial-gradient(ellipse at 30% 0%, #0d1520 0%, var(--bg) 60%, #020408 100%);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
}

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

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

/* Info Panel (Left) */
.info-panel {
  position: absolute;
  top: 60px;
  left: 20px;
  width: 280px;
  background: rgba(10, 15, 26, 0.95);
  border: 1px solid rgba(0, 212, 255, 0.4);
  border-radius: 12px;
  padding: 12px;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.info-panel .panel-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
}

.panel-subtitle {
  font-size: 10px;
  color: var(--muted);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.voltage-section {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.2);
}

.voltage-display {
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  text-shadow: 0 0 30px rgba(0, 212, 255, 0.6);
  line-height: 1;
  margin-bottom: 8px;
}

.voltage-display .unit {
  font-size: 18px;
  opacity: 0.7;
}

.voltage-bar {
  height: 8px;
  background: linear-gradient(90deg, 
    #3867d6 0%, 
    #26de81 35%, 
    #fed330 50%, 
    #ff7b4a 70%, 
    #ff4757 100%
  );
  border-radius: 4px;
  position: relative;
  margin-bottom: 4px;
}

.voltage-marker {
  position: absolute;
  top: -4px;
  width: 4px;
  height: 16px;
  background: white;
  border-radius: 2px;
  box-shadow: 0 0 8px white, 0 0 16px rgba(255, 255, 255, 0.5);
  transition: left 0.1s ease;
  left: 15%;
}

.voltage-labels {
  display: flex;
  justify-content: space-between;
  font-size: 8px;
  color: var(--muted);
}

.phase-indicator {
  text-align: center;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--success);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stats-section {
  margin-bottom: 12px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  padding: 4px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-label { color: var(--muted); }
.stat-value { color: var(--text); font-weight: 500; }

.concentration-section {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 10px;
}

.conc-title {
  font-size: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
  text-align: center;
}

.conc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.conc-side {
  font-size: 9px;
}

.conc-header {
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 8px;
  letter-spacing: 0.5px;
}

.conc-item {
  padding: 2px 0;
}

.conc-item.na { color: var(--na-ion); }
.conc-item.k { color: var(--k-ion); }
.conc-item.cl { color: var(--cl-ion); }

/* Region Section */
.region-section {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 10px;
  margin-top: 10px;
}

.region-title {
  font-size: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
  text-align: center;
}

.region-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.region-item {
  font-size: 8px;
  padding: 6px;
  border-radius: 4px;
  line-height: 1.4;
}

.region-item.soma {
  background: linear-gradient(135deg, rgba(136, 136, 255, 0.15), rgba(136, 136, 255, 0.05));
  border: 1px solid rgba(136, 136, 255, 0.3);
  color: #aaaaff;
}

.region-item.hillock {
  background: linear-gradient(135deg, rgba(255, 68, 68, 0.15), rgba(255, 68, 68, 0.05));
  border: 1px solid rgba(255, 68, 68, 0.3);
  color: #ff8888;
}

.region-item strong {
  display: block;
  font-size: 9px;
  margin-bottom: 2px;
}

/* Legend */
.legend {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(10, 15, 26, 0.95);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 12px;
  padding: 12px;
  backdrop-filter: blur(12px);
  max-width: 280px;
}

.legend .panel-header .legend-title {
  font-size: 13px;
  color: var(--accent);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 0;
}

.legend-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 12px;
}

.legend-item {
  display: flex;
  align-items: center;
  font-size: 9px;
  color: var(--muted);
}

.legend-color {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  margin-right: 6px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.legend-color.lipid { background: var(--lipid-head); }
.legend-color.cholesterol { background: var(--cholesterol); }
.legend-color.na-channel { background: var(--na-channel); }
.legend-color.na-channel-open { background: var(--na-channel-open); box-shadow: 0 0 6px var(--na-channel-open); }
.legend-color.k-channel { background: var(--k-channel); }
.legend-color.k-channel-open { background: var(--k-channel-open); box-shadow: 0 0 6px var(--k-channel-open); }
.legend-color.pump { background: var(--pump); }
.legend-color.na-ion { background: var(--na-ion); border-radius: 50%; }
.legend-color.k-ion { background: var(--k-ion); border-radius: 50%; }
.legend-color.atp { background: var(--atp); }
.legend-color.adp { background: #888888; }
.legend-color.voltage-sensor { background: #4080ff; box-shadow: 0 0 4px #4080ff; }

/* Controls Panel (Right) */
.controls-panel {
  position: absolute;
  top: 60px;
  right: 20px;
  width: 300px;
  background: rgba(10, 15, 26, 0.95);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 12px;
  padding: 12px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  backdrop-filter: blur(12px);
  font-size: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.controls-panel .panel-content {
  max-height: calc(100vh - 160px);
  overflow-y: auto;
}

.controls-panel .panel-header h2 {
  font-size: 14px;
}

.controls-panel::-webkit-scrollbar {
  width: 6px;
}

.controls-panel::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 3px;
}

.controls-panel::-webkit-scrollbar-thumb {
  background: rgba(0, 212, 255, 0.3);
  border-radius: 3px;
}

.controls-panel .panel-content h2 {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
  margin-top: 4px;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.2);
}

.button-group {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
}

button {
  flex: 1;
  padding: 10px 8px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(0, 212, 255, 0.05));
  border: 1px solid rgba(0, 212, 255, 0.4);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  transition: all 0.2s ease;
}

button:hover {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.25), rgba(0, 212, 255, 0.1));
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 212, 255, 0.2);
}

button.active {
  background: linear-gradient(135deg, var(--success), rgba(38, 222, 129, 0.8));
  border-color: var(--success);
  box-shadow: 0 0 12px rgba(38, 222, 129, 0.4);
}

button.depol {
  background: linear-gradient(135deg, rgba(255, 71, 87, 0.25), rgba(255, 71, 87, 0.1));
  border-color: var(--danger);
}

button.depol:hover {
  background: linear-gradient(135deg, rgba(255, 71, 87, 0.4), rgba(255, 71, 87, 0.2));
}

button.hyperpol {
  background: linear-gradient(135deg, rgba(56, 103, 214, 0.25), rgba(56, 103, 214, 0.1));
  border-color: var(--cl-ion);
}

button.hyperpol:hover {
  background: linear-gradient(135deg, rgba(56, 103, 214, 0.4), rgba(56, 103, 214, 0.2));
}

.control-group {
  margin: 14px 0;
}

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

.control-value {
  color: var(--accent);
  font-weight: 600;
}

input[type="range"] {
  width: 100%;
  height: 6px;
  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: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--accent);
}

.slider-hint {
  font-size: 9px;
  color: var(--muted);
  margin-top: 4px;
  text-align: center;
}

.info-box {
  background: rgba(255, 123, 74, 0.1);
  border-left: 3px solid var(--accent-2);
  padding: 10px;
  margin: 14px 0;
  border-radius: 4px;
  font-size: 10px;
  line-height: 1.5;
  color: var(--muted);
}

.info-box strong {
  color: var(--accent-2);
}

.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);
  margin: 16px 0;
}

.back-link {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 20px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 20px;
  color: var(--accent);
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  transition: all 0.2s ease;
  z-index: 100;
}

.back-link:hover {
  background: rgba(0, 212, 255, 0.2);
  box-shadow: 0 4px 16px rgba(0, 212, 255, 0.2);
}

.stats {
  font-size: 10px;
  color: var(--muted);
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(0, 212, 255, 0.2);
}

.stats div {
  margin: 3px 0;
}

.click-hint {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 15, 26, 0.9);
  padding: 10px 24px;
  border-radius: 20px;
  font-size: 11px;
  color: var(--muted);
  border: 1px solid rgba(0, 212, 255, 0.2);
  white-space: nowrap;
}

/* Draggable Panel System */
.draggable-panel {
  position: absolute;
  z-index: 10;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  margin-bottom: 8px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.3);
  cursor: grab;
  user-select: none;
}

.panel-header:active {
  cursor: grabbing;
}

.panel-header .panel-title,
.panel-header .legend-title,
.panel-header h2 {
  margin: 0;
  padding: 0;
  border: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.panel-controls {
  display: flex;
  gap: 4px;
}

.minimize-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  font-size: 16px;
  font-weight: bold;
  line-height: 1;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 4px;
  color: var(--accent);
  cursor: pointer;
  transition: all 0.2s ease;
  flex: none;
}

.minimize-btn:hover {
  background: rgba(0, 212, 255, 0.2);
  transform: none;
  box-shadow: none;
}

.panel-content {
  transition: all 0.2s ease;
}

.draggable-panel.minimized {
  width: auto !important;
  min-width: 150px;
}

.draggable-panel.minimized .panel-header {
  margin-bottom: 0;
  border-bottom: none;
}

/* Graph Panel */
.graphs-panel {
  position: absolute;
  bottom: 20px;
  left: 320px;
  width: 420px;
  background: rgba(10, 15, 26, 0.95);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 12px;
  padding: 12px;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.graph-container {
  margin-bottom: 8px;
}

.graph-container:last-child {
  margin-bottom: 0;
}

.graph-title {
  font-size: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.graph-container canvas {
  width: 100%;
  height: auto;
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 6px;
  background: rgba(5, 8, 16, 0.8);
}

/* EPSP/IPSP buttons */
button.epsp {
  background: linear-gradient(135deg, rgba(38, 222, 129, 0.25), rgba(38, 222, 129, 0.1));
  border-color: var(--success);
}

button.epsp:hover {
  background: linear-gradient(135deg, rgba(38, 222, 129, 0.4), rgba(38, 222, 129, 0.2));
}

button.ipsp {
  background: linear-gradient(135deg, rgba(155, 89, 182, 0.25), rgba(155, 89, 182, 0.1));
  border-color: var(--purple);
}

button.ipsp:hover {
  background: linear-gradient(135deg, rgba(155, 89, 182, 0.4), rgba(155, 89, 182, 0.2));
}

/* Select dropdown */
select {
  width: 100%;
  padding: 8px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 6px;
  color: var(--text);
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2300d4ff' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.3);
}

select option {
  background: #0a0f1a;
  color: var(--text);
}

.recording-info {
  font-size: 9px;
  color: var(--muted);
  margin-top: 6px;
  padding: 6px;
  background: rgba(0, 212, 255, 0.05);
  border-left: 2px solid var(--accent);
  border-radius: 2px;
  line-height: 1.4;
}

/* Animations */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 5px currentColor; }
  50% { box-shadow: 0 0 20px currentColor, 0 0 30px currentColor; }
}

/* Channel state indicators */
.channel-open {
  animation: glow 0.5s ease-in-out infinite;
}

/* Responsive adjustments */
@media (max-width: 1200px) {
  .info-panel { width: 240px; }
  .controls-panel { width: 260px; }
}

@media (max-width: 900px) {
  .info-panel { 
    top: auto;
    bottom: 80px;
    left: 10px;
    width: 200px;
    font-size: 10px;
  }
  .controls-panel {
    width: 220px;
    right: 10px;
  }
  .legend {
    display: none;
  }
}