:root {
  /* 主色調 - 亮色系 (Slate Palette) */
  --bg-primary: #f8fafc;    /* Slate 50 */
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;   /* Slate 100 */
  --bg-card: #ffffff;

  /* 文字顏色 */
  --text-primary: #0f172a;  /* Slate 900 */
  --text-secondary: #475569; /* Slate 600 */
  --text-muted: #94a3b8;    /* Slate 400 */

  /* 強調色 */
  --accent-gold: #fbbf24;   /* Amber 400 - Bright Gold */
  --accent-orange: #f97316; /* Orange 500 */
  --accent-blue: #3b82f6;   /* Blue 500 */

  /* K 線顏色 (保持識別性，但在亮底微調亮度) */
  --candle-up: #059669;     /* Emerald 600 */
  --candle-down: #dc2626;   /* Red 600 */
  --candle-up-bg: rgba(5, 150, 105, 0.1);
  --candle-down-bg: rgba(220, 38, 38, 0.1);

  /* 指標顏色 */
  --indicator-chase: #ea580c; /* Orange 600 */
  --indicator-chip: #2563eb;  /* Blue 600 */
  --indicator-ladder: #9333ea; /* Purple 600 */

  /* 邊框與陰影 */
  --border-color: #e2e8f0;  /* Slate 200 */
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);

  /* 間距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
}

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

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

/* 頂部工具列 */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  height: 48px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.product-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-gold);
}

.stock-symbol {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-gold);
}

.stock-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-left: 8px;
}

.price-info {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
}

.current-price {
  font-size: 24px;
  font-weight: 700;
}

.price-change {
  font-size: 14px;
  font-weight: 500;
}

.price-up {
  color: var(--candle-up);
}
.price-down {
  color: var(--candle-down);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* 工具按鈕 */
.tool-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: none;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.tool-btn:hover {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
}

.tool-btn.active {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
}

.tool-btn svg {
  width: 20px;
  height: 20px;
}

/* 時間週期選擇器 */
.timeframe-selector {
  display: flex;
  gap: var(--spacing-xs);
  background-color: var(--bg-tertiary);
  padding: 4px;
  border-radius: 8px;
}

.timeframe-btn {
  padding: 6px 12px;
  border: none;
  border-radius: 6px;
  background-color: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.timeframe-btn:hover {
  color: var(--text-primary);
}

.timeframe-btn.active {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
}

/* 主圖表區 */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.chart-container {
  /* 計算可用高度：100vh - header(48px) - nav(56px) - volume(120px) */
  height: calc(100vh - 48px - 56px - 120px);
  min-height: 200px; /* 最小高度保護 */
  position: relative;
  background-color: var(--bg-primary);
  overflow: hidden;
}

#main-chart {
  width: 100%;
  height: 100%;
  position: relative;
}

/* OHLCV Legend */
.ohlc-legend {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 20;
  display: flex;
  gap: 12px;
  font-size: 13px;
  font-family: "Inter", sans-serif;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.85); /* Semi-transparent background */
  backdrop-filter: blur(4px);
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
}

.legend-item {
  color: #888;
}

.legend-value {
  color: var(--text-primary);
  font-weight: 500;
  margin-left: 4px;
}

/* 成交量區 */
.volume-container {
  height: 120px;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
}

/* 加權指數區 */
.index-container {
  height: 100px;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  position: relative;
}

.index-label {
  position: absolute;
  top: 4px;
  left: 10px;
  font-size: 11px;
  color: var(--text-muted);
  z-index: 10;
  pointer-events: none;
}

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

/* 加權指數獨立頁面 */
.page-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
}

.index-page-header {
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.index-page-header h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-gold);
  margin: 0;
}

.index-page-chart {
  flex: 1;
  min-height: 300px;
}

/* 左側畫圖工具列 */
.drawing-toolbar {
  position: fixed;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  flex-direction: column;
  gap: 4px;
  background-color: var(--bg-secondary);
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  z-index: 100;
  box-shadow: var(--shadow);
  max-height: 80vh;
  overflow-y: auto;
}

.drawing-toolbar.show {
  display: flex;
}

.toolbar-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}

.drawing-btn {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  border: none;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.drawing-btn:hover {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
}

.drawing-btn.active {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
}

.drawing-btn svg {
  width: 20px;
  height: 20px;
}

/* 畫圖屬性列 */
.drawing-property-bar {
  position: fixed;
  top: 56px;
  left: 60px;
  display: none;
  align-items: center;
  gap: 16px;
  background-color: var(--bg-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  z-index: 99;
  box-shadow: var(--shadow);
}

.drawing-property-bar.show {
  display: flex;
}

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

.property-group label {
  font-size: 12px;
  color: var(--text-secondary);
}

.property-group input[type="color"] {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
  background: transparent;
}

.property-group input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.property-group input[type="color"]::-webkit-color-swatch {
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.color-presets {
  display: flex;
  gap: 4px;
}

.color-preset {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.color-preset:hover {
  transform: scale(1.2);
}

.thickness-selector {
  display: flex;
  gap: 4px;
}

.thickness-btn {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.thickness-btn:hover {
  background-color: var(--accent-blue);
  color: var(--bg-primary);
}

.thickness-btn.active {
  background-color: var(--accent-blue);
  color: var(--bg-primary);
}

.property-group input[type="text"] {
  width: 120px;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
}

.property-group select {
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 12px;
  cursor: pointer;
}

.property-delete-btn {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  border: none;
  background-color: var(--candle-down);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s ease;
}

.property-delete-btn:hover {
  opacity: 0.8;
}

/* SVG 繪圖層 */
#drawing-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

#drawing-layer.drawing-layer-enabled {
  pointer-events: auto;
  cursor: crosshair;
}

.drawing-obj {
  pointer-events: stroke;
}

.drawing-obj:hover {
  filter: brightness(1.2);
}

.drawing-obj.selected {
  filter: brightness(1.3);
  stroke-dasharray: 5, 3;
}

/* 斐波那契樣式 */
.fib-level {
  pointer-events: none;
}

.fib-label {
  font-size: 10px;
  fill: currentColor;
  pointer-events: none;
}

#volume-chart {
  width: 100%;
  height: 100%;
  position: relative;
}

/* 產業漲跌幅區 */
.industry-container {
  display: none;
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  overflow-y: auto;
  max-height: 200px;
}

.industry-container.show {
  display: block;
}

.industry-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.industry-tab {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.industry-tab.active {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
}

.industry-bars {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.industry-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 8px 12px;
  background-color: var(--bg-card);
  border-radius: 6px;
  min-width: 140px;
}

.industry-name {
  font-size: 12px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.industry-change {
  font-size: 14px;
  font-weight: 600;
  margin-left: auto;
}

/* 底部導覽 */
.bottom-nav {
  display: flex;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  height: 56px;
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: none;
  background-color: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-item:hover {
  color: var(--text-primary);
}

.nav-item.active {
  color: var(--accent-gold);
}

.nav-item svg {
  width: 24px;
  height: 24px;
}

.nav-item span {
  font-size: 12px;
  font-weight: 500;
}

/* 設定彈窗 */
.settings-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.4); /* 調深背景色以彌補失去模糊後的對比 */
  z-index: 1000;
  justify-content: center;
  align-items: center;
  /* 移除 backdrop-filter */
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
}

.settings-modal.show {
  display: flex;
  opacity: 1;
}

.settings-panel {
  background: #ffffff;
  border-radius: 24px;
  width: 90%;
  max-width: 420px;
  max-height: 85vh;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  box-shadow: 
    0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 8px 10px -6px rgba(0, 0, 0, 0.1);
  transform: translateY(20px);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 美化卷軸樣式 */
.settings-panel::-webkit-scrollbar {
  width: 6px;
}

.settings-panel::-webkit-scrollbar-track {
  background: transparent;
  margin: 12px 0;
}

.settings-panel::-webkit-scrollbar-thumb {
  background: #e2e8f0;
  border-radius: 10px;
}

.settings-panel::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.settings-modal.show .settings-panel {
  transform: translateY(0);
}

.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
}

.settings-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.settings-close {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 12px;
  background-color: rgba(241, 245, 249, 0.8);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.settings-close:hover {
  background-color: var(--candle-down);
  color: white;
  transform: rotate(90deg);
}

.settings-title {
  font-size: 18px;
  font-weight: 600;
}

.settings-close {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.settings-content {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 12px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  transition: all 0.2s ease;
  border-radius: 12px;
  margin: 4px -8px;
}

.setting-item:hover {
  background-color: rgba(241, 245, 249, 0.4);
}

.setting-item:last-child {
  border-bottom: none;
}

.setting-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.setting-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* 控盤階梯方案 Select 樣式優化 */
#ladder-mode-select {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  appearance: none; /* 移除預設箭頭 */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23475569'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 16px;
  padding-right: 32px;
}

#ladder-mode-select:hover {
  border-color: var(--accent-gold);
  background-color: #fafafa;
}

#ladder-mode-select:focus {
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.2);
}

/* 開關樣式 - iOS Style */
.toggle-switch {
  position: relative;
  width: 50px;
  height: 28px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #e2e8f0;
  border-radius: 28px;
  transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: 50%;
  transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.toggle-switch input:checked + .toggle-slider {
  background: linear-gradient(135deg, var(--accent-gold) 0%, #f59e0b 100%);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(22px);
}

.toggle-switch input:focus + .toggle-slider {
  box-shadow: 0 0 1px var(--accent-gold), inset 0 2px 4px rgba(0,0,0,0.05);
}

/* 設定區塊分隔線 (麥門指標等) */
.settings-section-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: var(--spacing-md) 0;
  margin-top: var(--spacing-sm);
}

.settings-section-divider::before,
.settings-section-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-color), transparent);
}

.settings-section-divider span {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

/* 十字準心浮窗 */
.crosshair-tooltip {
  display: none;
  position: absolute;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 12px;
  z-index: 100;
  pointer-events: none;
  box-shadow: var(--shadow);
}

.crosshair-tooltip.show {
  display: block;
}

.tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: 2px 0;
}

.tooltip-label {
  color: var(--text-muted);
}

.tooltip-value {
  font-weight: 500;
}

/* 指標標籤 */
.indicator-label {
  position: absolute;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  pointer-events: none;
  z-index: 50;
}

.label-chase {
  background-color: var(--indicator-chase);
  color: var(--bg-primary);
}

.label-chip {
  background-color: var(--indicator-chip);
  color: var(--bg-primary);
}

.label-ladder {
  background-color: var(--indicator-ladder);
  color: white;
}

/* 響應式設計 */
@media (max-width: 768px) {
  .header {
    padding: var(--spacing-sm);
  }

  .product-name {
    font-size: 14px;
  }

  .current-price {
    font-size: 18px;
  }

  .timeframe-selector {
    display: none;
  }
}
/* Loading Overlay */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(13, 13, 13, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 50;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.loading-overlay.show {
  visibility: visible;
  opacity: 1;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-left-color: var(--accent-gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* 右下角即時時鐘 */
.clock-display {
  position: fixed;
  bottom: 62px;
  right: 8px;
  background-color: transparent;
  border: none;
  padding: 2px 4px;
  font-size: 11px;
  font-weight: 500;
  font-family: "Roboto Mono", monospace;
  color: var(--text-primary);
  z-index: 50;
}

/* 股票自動完成選單 (Autocomplete) */
.autocomplete-results {
  position: absolute;
  top: 100%;
  left: 0;
  width: 200px;
  max-height: 300px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-top: 8px;
  overflow-y: auto;
  z-index: 2000;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

.autocomplete-item {
  padding: 10px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  transition: all 0.2s ease;
}

.autocomplete-item:last-child {
  border-bottom: none;
}

.autocomplete-item:hover, .autocomplete-item.selected {
  background-color: var(--bg-tertiary);
  color: var(--accent-blue);
}

.autocomplete-code {
  font-weight: 700;
  font-family: "Roboto Mono", monospace;
  font-size: 14px;
}

.autocomplete-name {
  font-size: 13px;
  color: var(--text-secondary);
}

.autocomplete-item:hover .autocomplete-name, 
.autocomplete-item.selected .autocomplete-name {
  color: var(--accent-blue);
}