:root {
  --bg-color: #0b0f1a;
  --panel-bg: #161b22;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #4088d8;
  --success: #3fb950;
  --danger: #ff4d4d;
  --glass-bg: rgba(22, 27, 34, 0.7);
}

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

body {
  background: var(--bg-color);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Topbar */
#topbar {
  display: flex; 
  align-items: center; 
  gap: 20px;
  padding: 0 20px; 
  background: var(--glass-bg); 
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0; 
  height: 60px;
  z-index: 100;
}

.logo { 
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px; 
  color: var(--accent); 
  font-weight: 700; 
  letter-spacing: 0.5px;
}

.controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 10px;
}

select {
  appearance: none;
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 32px 8px 12px;
  font-family: inherit;
  font-size: 14px;
  border-radius: 6px;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  min-width: 180px;
}

select:hover:not(:disabled) {
  border-color: var(--accent);
}

select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.3);
}

select:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn:hover {
  background: var(--border-color);
  color: var(--accent);
}

.info {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-left: auto;
}

.ticker { 
  font-size: 20px; 
  font-weight: 700; 
}

.date-range { 
  font-size: 12px; 
  color: var(--text-secondary); 
}

.price-display { 
  font-size: 18px; 
  color: var(--success); 
  font-weight: 600; 
}

/* Main App Body */
#app-body { 
  position: relative;
  display: flex; 
  flex: 1; 
  overflow: hidden; 
}

#panels { 
  display: flex; 
  flex-direction: column; 
  flex: 1; 
  overflow: hidden; 
}

#chart-wrapper { 
  flex: 1 1 auto; 
  min-height: 200px; 
  position: relative; 
  overflow: hidden; 
}

#chart { width: 100%; height: 100%; }

.indicator-wrapper { 
  flex: 0 0 auto; 
  position: relative; 
  overflow: hidden; 
}

.indicator-chart { width: 100%; height: 100%; }

.panel-label { 
  position: absolute; 
  top: 6px; 
  left: 12px; 
  font-size: 12px; 
  font-weight: 500;
  color: var(--text-secondary); 
  z-index: 10; 
  pointer-events: none; 
}

.resizer { 
  height: 4px; 
  background: var(--border-color); 
  flex: 0 0 auto; 
  cursor: ns-resize;
  transition: background 0.2s;
}

.resizer:hover,
.resizer.active {
  background: var(--accent);
}

#indicators-container { 
  display: flex; 
  flex-direction: column; 
  flex: 0 0 auto; 
}

/* Loading Overlay */
.overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.overlay.active {
  opacity: 1;
  pointer-events: all;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(88, 166, 255, 0.2);
  border-radius: 50%;
  border-top-color: var(--accent);
  animation: spin 1s ease-in-out infinite;
  margin-bottom: 16px;
}

.overlay-text {
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 500;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* UI Controls Additions */
.divider {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  margin: 0 4px;
}

.btn-primary {
  background: var(--success);
  color: #000;
  border-color: var(--success);
  font-weight: 600;
  padding: 0 12px;
  width: auto;
}
.btn-primary:hover {
  background: #349942;
  color: #000;
}

#cart-count {
  background: rgba(0,0,0,0.3);
  padding: 2px 6px;
  border-radius: 10px;
  margin-left: 6px;
  font-size: 12px;
}

/* Indicator Overlays & Controls */
.overlays-container {
  position: absolute;
  top: 10px;
  left: 12px;
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 4px;
  pointer-events: none;
}

.indicator-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
  font-size: 12px;
  color: var(--text-secondary);
}

.panel-drag-handle {
  cursor: grab;
  user-select: none;
}

.panel-drag-handle:active {
  cursor: grabbing;
}

.drag-handle {
  font-size: 13px;
  line-height: 1;
  color: var(--text-secondary);
  letter-spacing: -1px;
}

.indicator-group.dragging {
  opacity: 0.6;
}

.indicator-group.drag-over-top .indicator-wrapper {
  box-shadow: inset 0 2px 0 var(--accent);
}

.indicator-group.drag-over-bottom .indicator-wrapper {
  box-shadow: inset 0 -2px 0 var(--accent);
}

.indicator-title {
  font-weight: 500;
}

.indicator-val {
  color: var(--text-primary);
}

.indicator-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.2s;
}

.indicator-legend:hover .indicator-actions,
.panel-label:hover .indicator-actions {
  opacity: 1;
}

.ind-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 2px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ind-btn:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0; top: 0; width: 100%; height: 100%;
  background-color: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}
.modal.active { display: flex; }

.modal-content {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 300px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-header h3 { font-size: 16px; font-weight: 600; }
.close-modal { cursor: pointer; font-size: 24px; color: var(--text-secondary); line-height: 1; padding: 4px; }
.close-modal:hover { color: var(--text-primary); }

.modal-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.form-group label { font-size: 13px; color: var(--text-secondary); }
.form-group input {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: 4px;
  width: 80px;
}
.form-group input[type="color"] {
  padding: 0;
  width: 32px;
  height: 24px;
  border: none;
  cursor: pointer;
}

.modal-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.modal-footer .btn {
  width: auto;
  padding: 8px 16px;
  height: auto;
  min-width: 80px;
  font-size: 14px;
}

.modal-footer .btn:first-child {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.modal-footer .btn:first-child:hover {
  background: #cc0000;
}

/* New Controls */
.control-item {
  appearance: none;
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 32px 8px 12px;
  font-family: inherit;
  font-size: 13px;
  border-radius: 4px;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  min-width: 130px;
}

.control-item:hover {
  border-color: var(--accent);
  background-color: var(--border-color);
}

/* Legend Bar */
#legend-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 4px 14px;
  background: var(--bg-color);
  flex-shrink: 0;
  min-height: 24px;
  font-size: 11px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-dot {
  width: 12px;
  height: 3px;
  border-radius: 1px;
}

.remove-overlay-btn {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 11px;
  font-weight: bold;
  padding: 0 2px;
}

.remove-overlay-btn:hover {
  color: #ff9999;
}

/* Price Label */
#price-label {
  position: absolute;
  right: 60px;
  top: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: bold;
  padding: 2px 8px;
  border-radius: 3px;
  pointer-events: none;
  z-index: 20;
  font-family: 'Courier New', monospace;
}

#scale-controls {
  position: absolute;
  right: 10px;
  bottom: 12px;
  z-index: 25;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.scale-btn {
  width: 22px;
  height: 22px;
  border: 1px solid var(--border-color);
  background: rgba(22, 27, 34, 0.9);
  color: var(--text-secondary);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: all 0.15s ease;
}

.scale-btn:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: var(--accent);
}

.scale-btn.active {
  color: #ffffff;
  border-color: var(--accent);
  background: rgba(88, 166, 255, 0.35);
}

.scale-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* Theme-specific styles */
body.light-theme {
  --bg-color: #f0f2f5;
  --panel-bg: #ffffff;
  --border-color: #d0d7de;
  --text-primary: #24292f;
  --text-secondary: #57606a;
  --glass-bg: rgba(255, 255, 255, 0.8);
}

body.light-theme #topbar {
  background: var(--glass-bg);
  border-bottom-color: var(--border-color);
}

body.light-theme .ticker {
  color: var(--text-primary);
}

body.light-theme .control-item {
  background: var(--panel-bg);
  border-color: var(--border-color);
  color: var(--text-primary);
}

body.light-theme .control-item:hover {
  background: #eef1f4;
  color: #000;
}

body.light-theme #legend-bar {
  background: #ffffff;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

body.light-theme .panel-label {
  color: var(--text-secondary);
}

body.light-theme .resizer {
  background: var(--border-color);
}

body.light-theme .resizer:hover,
body.light-theme .resizer.active {
  background: #0969da;
}

body.light-theme select {
  background-color: var(--panel-bg);
  border-color: var(--border-color);
  color: var(--text-primary);
}

body.light-theme .btn {
  background: var(--panel-bg);
  border-color: var(--border-color);
  color: var(--text-primary);
}

body.light-theme .btn:hover {
  background: var(--border-color);
}

body.light-theme .scale-btn {
  background: rgba(255, 255, 255, 0.95);
}

body.light-theme .scale-btn.active {
  color: #0969da;
  background: rgba(9, 105, 218, 0.14);
}