:root {
  /* Dark theme variables */
  --tv-main-bg: #131722;
  --tv-secondary-bg: #1e222d;
  --tv-header-bg: #2a2e39;
  --tv-border-color: #363c4e;
  --tv-text-primary: #d1d4dc;
  --tv-text-secondary: #787b86;
  --tv-accent-color: #2962ff;
  --tv-up-color: #089981;
  --tv-down-color: #f23645;
  --tv-button-bg: #2a2e39;
  --tv-button-hover: #363a45;
  --transition: all 0.2s ease;
}

/* Light theme variables */
.light-theme {
  --tv-main-bg: #ffffff;
  --tv-secondary-bg: #f8f9fd;
  --tv-header-bg: #f8f9fd;
  --tv-border-color: #e0e3eb;
  --tv-text-primary: #131722;
  --tv-text-secondary: #787b86;
  --tv-accent-color: #2962ff;
  --tv-up-color: #089981;
  --tv-down-color: #f23645;
  --tv-button-bg: #f0f3fa;
  --tv-button-hover: #e0e3eb;
}

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

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

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.header {
  background: var(--tv-header-bg);
  border-bottom: 1px solid var(--tv-border-color);
  padding: 0 16px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo i {
  font-size: 20px;
  color: var(--tv-accent-color);
}

.logo h1 {
  font-size: 20px;
  font-weight: 600;
  color: var(--tv-text-primary);
  letter-spacing: -0.5px;
}

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

.toolbar {
  background: var(--tv-secondary-bg);
  border-bottom: 1px solid var(--tv-border-color);
  padding: 5px 16px;
  display: flex;
  gap: 16px;
  align-items: center;
  height: 48px;
  overflow-x: auto;
}

.toolbar::-webkit-scrollbar {
  height: 0;
  background: transparent;
}

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

.control-group label {
  color: var(--tv-text-secondary);
  font-size: 12px;
  font-weight: 500;
}

select, button, input[type="file"] {
  background: var(--tv-button-bg);
  border: 1px solid var(--tv-border-color);
  color: var(--tv-text-primary);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 13px;
  transition: var(--transition);
  cursor: pointer;
  height: 32px;
  outline: none;
}

select:hover, button:hover {
  background: var(--tv-button-hover);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  min-width: 32px;
  justify-content: center;
  white-space: nowrap;
}

.btn i {
  font-size: 16px;
}

.btn-icon {
  width: 32px;
  padding: 0;
}

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

.btn-primary:hover {
  background: #1e4bd8;
  border-color: #1e4bd8;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#replay-controls {
  display: flex;
  gap: 4px;
  align-items: center;
}

.speed-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
  padding-left: 8px;
  border-left: 1px solid var(--tv-border-color);
  width: 200px;
}

#speed-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--tv-text-secondary);
  font-size: 12px;
  white-space: nowrap;
  width: 45px;
}

#speed-value {
  min-width: 28px;
  text-align: right;
}

/* Enhanced Slider Styling */
.styled-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 4px;
  background: var(--tv-border-color);
  border-radius: 2px;
  outline: none;
  margin: 0;
  padding: 0;
  cursor: pointer;
  flex: none;
}

.styled-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--tv-text-primary);
  border: 2px solid var(--tv-accent-color);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  transition: all 0.2s ease;
}

.styled-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  background: var(--tv-accent-color);
  border-color: var(--tv-accent-color);
}

.styled-slider::-webkit-slider-thumb:active {
  transform: scale(0.95);
  background: var(--tv-accent-color);
  border-color: var(--tv-accent-color);
}

/* Playback direction controls */
.direction-controls {
  display: none;
}

.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 86px); /* 38px header + 48px toolbar */
}

.left-toolbar {
  width: 48px;
  background: var(--tv-secondary-bg);
  border-right: 1px solid var(--tv-border-color);
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 8px;
  flex-shrink: 0;
}

.chart-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#chart {
  width: 100%;
  flex: 1;
  background: var(--tv-main-bg);
  min-height: 0; /* Important for proper flex behavior */
}

/* Status bar at bottom */
.status-bar {
  height: 25px;
  background: var(--tv-secondary-bg);
  border-top: 1px solid var(--tv-border-color);
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-size: 12px;
  color: var(--tv-text-secondary);
  flex-shrink: 0;
}

.status-bar-item {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: 16px;
}

.status-bar-item i {
  font-size: 14px;
}

/* Adjust info panel position */
#info-panel {
  position: absolute;
  top: 40px;
  right: 8px;
  padding: 4px 8px;
  font-size: 12px;
  line-height: 1.5;
  z-index: 100;
  min-width: 120px;
  font-family: 'JetBrains Mono', monospace;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.info-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  white-space: nowrap;
}

.info-label {
  color: var(--tv-text-secondary);
  font-weight: 500;
}

.info-value {
  color: var(--tv-text-primary);
  font-weight: 500;
}

.value-up {
  color: var(--tv-up-color);
}

.value-down {
  color: var(--tv-down-color);
}

/* Custom File Input */
.file-input-wrapper {
  position: relative;
  overflow: hidden;
}

.file-input-wrapper input[type="file"] {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  cursor: pointer;
}

.file-input-wrapper .btn {
  pointer-events: none;
}

/* Separator */
.separator {
  width: 1px;
  height: 24px;
  background: var(--tv-border-color);
  margin: 0 8px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .main-content {
    height: calc(100vh - 78px); /* Adjusted for smaller header/toolbar on mobile */
  }
  
  .left-toolbar {
    width: 40px;
  }
  
  .status-bar {
    padding: 0 8px;
  }
  
  .status-bar-item {
    margin-right: 8px;
  }
  
  #info-panel {
    top: auto;
    bottom: 33px; /* Position above status bar */
    right: 8px;
  }
}

/* Pairs Dialog */
.pairs-dialog {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(2px);
}

.pairs-dialog-content {
  background: var(--tv-secondary-bg);
  border: 1px solid var(--tv-border-color);
  border-radius: 8px;
  padding: 20px;
  min-width: 300px;
  max-width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.pairs-dialog h3 {
  margin: 0 0 16px;
  color: var(--tv-text-primary);
  font-size: 18px;
  font-weight: 500;
}

.pairs-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  max-height: 60vh;
  overflow-y: auto;
  padding: 4px;
  margin-top: 8px;
}

.pairs-list::-webkit-scrollbar {
  width: 8px;
}

.pairs-list::-webkit-scrollbar-track {
  background: var(--tv-button-bg);
  border-radius: 4px;
}

.pairs-list::-webkit-scrollbar-thumb {
  background: var(--tv-border-color);
  border-radius: 4px;
}

.pairs-list::-webkit-scrollbar-thumb:hover {
  background: var(--tv-text-secondary);
}

.pair-button {
  background: var(--tv-button-bg);
  color: var(--tv-text-primary);
  border: 1px solid var(--tv-border-color);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  height: 36px;
  display: flex;
  align-items: center;
}

.pair-button:hover {
  background: var(--tv-button-hover);
  border-color: var(--tv-accent-color);
}

.pair-button:active {
  transform: translateY(1px);
}