/**
 * 航空票務-航權與指標教學系統 - 現代專業航太主題樣式
 * 支援深色模式 (Dark Mode) 與明亮模式 (Light Mode)
 * 移除多餘飄動元素，強化課堂投影清晰度與專業教學排版
 */

:root {
    /* 深色模式預設變數 */
    --bg-main: #070d1d;
    --bg-secondary: #0c1527;
    --bg-card: rgba(15, 23, 42, 0.85);
    --bg-card-hover: rgba(30, 41, 59, 0.95);
    --border-color: rgba(51, 65, 85, 0.6);
    --border-glow: rgba(0, 240, 255, 0.4);

    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    --accent-cyan: #00f0ff;
    --accent-blue: #3b82f6;
    --accent-emerald: #10b981;
    --accent-amber: #f59e0b;
    --accent-rose: #ff5d8f;
    --accent-red: #ef4444;

    --tc1-color: #3b82f6;
    --tc2-color: #10b981;
    --tc3-color: #f59e0b;

    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.2);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
}

/* 明亮模式 (Light Mode - 專為明亮教室與投影設計) */
[data-theme="light"] {
    --bg-main: #f1f5f9;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-card-hover: #f8fafc;
    --border-color: #cbd5e1;
    --border-glow: rgba(2, 132, 199, 0.35);

    --text-main: #0f172a;
    --text-muted: #475569;
    --text-dim: #64748b;

    --accent-cyan: #0284c7;
    --accent-blue: #2563eb;
    --accent-emerald: #059669;
    --accent-amber: #d97706;
    --accent-rose: #e11d48;
    --accent-red: #dc2626;

    --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 12px rgba(2, 132, 199, 0.18);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* 頂端主導覽條 */
.app-header {
    background: var(--bg-secondary);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 9px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    font-size: 24px;
    color: var(--accent-cyan);
    filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
}

.brand-title {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-title .badge-tag {
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 4px;
    background: rgba(0, 240, 255, 0.15);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 240, 255, 0.35);
    font-weight: 600;
}

.brand-sub {
    font-size: 11px;
    color: var(--text-muted);
}

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

/* 圖層控制開關工具列 */
.layer-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-card);
    padding: 4px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.layer-toggle-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
}

.layer-toggle-label:hover {
    color: var(--accent-cyan);
}

.layer-toggle-label input[type="checkbox"] {
    accent-color: var(--accent-cyan);
    cursor: pointer;
    width: 14px;
    height: 14px;
}

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

/* 系統時間鐘 (UTC / 臺北時間) */
.time-clock-display {
    display: flex;
    gap: 12px;
    font-size: 11.5px;
    background: var(--bg-card);
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    font-family: var(--font-mono);
}

.time-item span {
    color: var(--text-dim);
    margin-right: 4px;
}
.time-item strong {
    color: var(--accent-cyan);
}

/* 按鈕風格 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 12.5px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    user-select: none;
}

.btn-action {
    background: linear-gradient(135deg, #00b4d8, #0077b6);
    color: #ffffff;
    box-shadow: 0 0 8px rgba(0, 180, 216, 0.3);
}

.btn-action:hover {
    background: linear-gradient(135deg, #00f0ff, #0096c7);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
    transform: translateY(-1px);
}

.btn-outline {
    background: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.btn-xs {
    padding: 3px 8px;
    font-size: 11px;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: var(--radius-sm);
}

/* 主舞台分割視圖 (保持水平並排，左地圖右控制台) */
.main-stage {
    display: flex;
    flex-direction: row;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* 左側：地圖容器視窗 */
.map-view-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background: var(--bg-main);
}

#map-container {
    flex: 1;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* 拖曳調整寬度時全螢幕游標鎖定 */
body.resizing-active {
    cursor: col-resize !important;
    user-select: none !important;
}

/* 左右拖曳寬度調整手柄 (Draggable Resizer) */
.panel-resizer {
    width: 10px;
    margin-left: -5px;
    margin-right: -5px;
    z-index: 90;
    cursor: col-resize;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    user-select: none;
    transition: background 0.2s ease;
    flex-shrink: 0;
}

.panel-resizer:hover, .panel-resizer.is-resizing {
    background: rgba(0, 240, 255, 0.18);
}

.resizer-handle-line {
    width: 2.5px;
    height: 48px;
    border-radius: 2px;
    background: var(--border-color);
    transition: all 0.2s ease;
}

.panel-resizer:hover .resizer-handle-line, .panel-resizer.is-resizing .resizer-handle-line {
    height: 80px;
    background: var(--accent-cyan);
    box-shadow: 0 0 10px var(--accent-cyan);
}

/* 右側：教學互動控制台 (自適應可拉伸寬度) */
.teaching-panel-wrapper {
    width: 520px;
    min-width: 320px;
    max-width: 80vw;
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 50;
    box-shadow: var(--shadow-md);
    transition: background-color 0.25s ease;
    box-sizing: border-box;
}

/* 教學面板收合狀態 (支援一鍵隱藏與地圖全螢幕自適應) */
body.panel-collapsed .teaching-panel-wrapper {
    display: none !important;
}

body.panel-collapsed .panel-resizer {
    display: none !important;
}

body.panel-collapsed .map-view-wrapper {
    width: 100% !important;
    flex: 1 1 100% !important;
}

/* 控制台導航分頁列 */
.nav-tab-bar {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 5px;
    overflow-x: auto;
    scrollbar-width: none;
    flex-shrink: 0;
}

/* 面板內部收合按鈕 */
.panel-collapse-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-left: 4px;
    flex-shrink: 0;
}

.panel-collapse-btn:hover {
    background: rgba(0, 240, 255, 0.12);
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

/* 地圖右上角浮動「展開選單」按鈕 (當面板隱藏時呈現) */
.floating-panel-toggle {
    position: absolute;
    right: 18px;
    top: 18px;
    z-index: 150;
    display: none;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    color: var(--accent-cyan);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 12.5px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45), 0 0 12px rgba(0, 240, 255, 0.2);
    backdrop-filter: blur(12px);
    transition: all 0.22s ease;
}

.floating-panel-toggle:hover {
    background: var(--accent-cyan);
    color: #0b132b;
    transform: translateX(-3px);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.5), 0 0 18px rgba(0, 240, 255, 0.4);
}

body.panel-collapsed .floating-panel-toggle {
    display: flex;
    animation: fPanelSlideIn 0.25s ease-out;
}

@keyframes fPanelSlideIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}
.nav-tab-bar::-webkit-scrollbar {
    display: none;
}

.nav-tab-btn {
    flex: 1;
    min-width: 65px;
    padding: 8px 4px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 11.5px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    white-space: nowrap;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
}

.nav-tab-btn i {
    font-size: 13px;
}

.nav-tab-btn:hover {
    color: var(--text-main);
    background: var(--bg-card-hover);
}

.nav-tab-btn.active {
    color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.12);
    border: 1px solid rgba(0, 240, 255, 0.3);
    box-shadow: 0 0 6px rgba(0, 240, 255, 0.15);
}

/* 分頁內容視窗 */
.tab-content-area {
    flex: 1;
    overflow-y: auto;
    padding: 14px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.tab-pane {
    display: none;
}
.tab-pane.active {
    display: block;
}

/* 通用卡片風格 */
.card-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 13px;
    margin-bottom: 14px;
    box-shadow: var(--shadow-sm);
}

.card-section-title {
    font-size: 13.5px;
    font-weight: 800;
    color: var(--accent-cyan);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 7px;
}

/* 航點搜尋與列表樣式 */
.search-box {
    margin-bottom: 10px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 8px 12px 8px 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 12.5px;
    outline: none;
    transition: border-color 0.2s;
}
.search-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 6px rgba(0, 240, 255, 0.2);
}

.search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    font-size: 12px;
}

.airport-list-container {
    max-height: 220px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.airport-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 7px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.airport-list-item:hover {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--accent-cyan);
    transform: translateX(2px);
}

.airport-list-item.highlight-taiwan {
    border-left: 3px solid #fbbf24;
}

.ap-item-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ap-item-iata {
    font-size: 13.5px;
    color: var(--accent-cyan);
    width: 34px;
}

.ap-name-zh {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-main);
    margin-right: 4px;
}

.ap-name-en {
    font-size: 11px;
    color: var(--text-muted);
}

.ap-item-right {
    display: flex;
    gap: 4px;
}

/* 徽章 (Badges) */
.badge {
    display: inline-block;
    padding: 2px 6px;
    font-size: 10px;
    font-weight: 700;
    border-radius: 4px;
    background: rgba(51, 65, 85, 0.15);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.badge.tc1, .badge.tc-tc1 {
    background: rgba(59, 130, 246, 0.15);
    color: #2563eb;
    border-color: rgba(59, 130, 246, 0.4);
}
.badge.tc2, .badge.tc-tc2 {
    background: rgba(16, 185, 129, 0.15);
    color: #059669;
    border-color: rgba(16, 185, 129, 0.4);
}
.badge.tc3, .badge.tc-tc3 {
    background: rgba(245, 158, 11, 0.15);
    color: #d97706;
    border-color: rgba(245, 158, 11, 0.4);
}

.badge.WH {
    background: rgba(59, 130, 246, 0.12);
    color: #3b82f6;
}
.badge.EH {
    background: rgba(16, 185, 129, 0.12);
    color: #10b981;
}

.badge.gmt {
    background: rgba(0, 240, 255, 0.12);
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}

/* 航點檔案卡 */
.hub-profile-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    padding: 14px;
    box-shadow: var(--shadow-sm);
}

.profile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.profile-code {
    font-size: 26px;
    font-weight: 900;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}

.profile-title h3 {
    font-size: 15px;
    color: var(--text-main);
}

.profile-subtitle {
    font-size: 11px;
    color: var(--text-muted);
}

.profile-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 7px;
    margin-bottom: 10px;
}

.meta-box {
    background: var(--bg-card);
    padding: 6px 9px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.meta-k {
    font-size: 10px;
    color: var(--text-dim);
}

.meta-v {
    font-size: 12px;
    color: var(--text-main);
    margin-top: 1px;
}

.profile-notes {
    font-size: 11.5px;
    background: rgba(0, 240, 255, 0.08);
    border-left: 3px solid var(--accent-cyan);
    padding: 7px 9px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 12px;
    color: var(--text-main);
}

.profile-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* 快速分區切換按鈕組 */
.tc-quick-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.tc-filter-btn {
    flex: 1;
    min-width: 90px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-main);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s ease;
    user-select: none;
}

.tc-filter-btn .badge {
    font-size: 10px;
    padding: 2px 5px;
    border-radius: 3px;
    font-weight: 800;
}

.tc-filter-btn.tc-filter-tc1 .badge { background: rgba(59, 130, 246, 0.2); color: #3b82f6; }
.tc-filter-btn.tc-filter-tc2 .badge { background: rgba(16, 185, 129, 0.2); color: #10b981; }
.tc-filter-btn.tc-filter-tc3 .badge { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }

.tc-filter-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.tc-filter-btn.active {
    background: var(--accent-cyan);
    color: #040d1a !important;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.tc-filter-btn.active .badge {
    background: rgba(0, 0, 0, 0.25);
    color: #ffffff;
}

.tc-filter-btn.dimmed {
    opacity: 0.4;
}

/* TC 三大區域樣式 (支援互斥聚焦與自動變暗) */
.tc-area-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.tc-area-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.tc-area-card.selected {
    transform: scale(1.01);
    box-shadow: 0 0 0 2px var(--accent-cyan), var(--shadow-md);
    opacity: 1 !important;
    filter: none !important;
}

.tc-area-card.dimmed {
    opacity: 0.35 !important;
    filter: grayscale(60%) !important;
    transform: scale(0.98);
}

.tc-area-card.tc-tc1 { border-left: 4px solid var(--tc1-color); }
.tc-area-card.tc-tc2 { border-left: 4px solid var(--tc2-color); }
.tc-area-card.tc-tc3 { border-left: 4px solid var(--tc3-color); }

.tc-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 7px;
}

.tc-chip {
    font-size: 12px;
    font-weight: 800;
    padding: 3px 7px;
    border-radius: 4px;
}
.tc-chip.tc-tc1 { background: rgba(59, 130, 246, 0.2); color: #2563eb; }
.tc-chip.tc-tc2 { background: rgba(16, 185, 129, 0.2); color: #059669; }
.tc-chip.tc-tc3 { background: rgba(245, 158, 11, 0.2); color: #d97706; }

.tc-card-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
}
.tc-card-alias {
    font-size: 11.5px;
}

.tc-boundary-box {
    font-size: 11.5px;
    color: var(--text-muted);
    background: var(--bg-secondary);
    padding: 7px 9px;
    border-radius: var(--radius-sm);
    margin-bottom: 7px;
    border: 1px solid var(--border-color);
}

.tc-note-alert {
    font-size: 11px;
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--accent-amber);
    padding: 5px 8px;
    border-radius: var(--radius-sm);
    margin-bottom: 7px;
}

.sub-areas-container {
    font-size: 11.5px;
    margin-bottom: 7px;
}
.sub-areas-title {
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 4px;
}
.sub-area-item {
    padding: 3px 0;
    border-bottom: 1px dashed var(--border-color);
}
.sub-area-item:last-child {
    border-bottom: none;
}
.sub-name {
    color: var(--text-main);
}
.sub-countries {
    color: var(--text-muted);
}

.pricing-codes {
    font-size: 11px;
    color: var(--text-dim);
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

/* 跨區飛行範例卡 */
.cross-flight-section {
    margin-top: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
}
.section-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 8px;
}
.cross-examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 7px;
}
.cross-ex-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 9px;
    cursor: pointer;
    transition: all 0.2s;
}
.cross-ex-card:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.06);
}
.cross-ex-badge {
    font-size: 11px;
    font-weight: 700;
    color: #f59e0b;
    margin-bottom: 3px;
}
.cross-route {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 2px;
}
.cross-rule {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 5px;
}

/* GI 指標卡片清單 */
.gi-list-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.gi-item-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 11px 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.gi-item-card:hover {
    border-color: var(--accent-cyan);
    background: var(--bg-card-hover);
}

.gi-item-card.active {
    border-color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.08);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.gi-card-top {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 5px;
}

.gi-code-tag {
    font-size: 15px;
    font-weight: 900;
    font-family: var(--font-mono);
    padding: 2px 7px;
    border-radius: 4px;
}

.gi-title-block {
    display: flex;
    align-items: center;
    gap: 7px;
    flex-wrap: wrap;
}

.gi-name {
    font-size: 13.5px;
    font-weight: 700;
    color: var(--text-main);
}

.gi-region-badge {
    font-size: 10.5px;
    background: var(--bg-secondary);
    padding: 2px 5px;
    border-radius: 3px;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.gi-definition {
    font-size: 11.5px;
    color: var(--text-main);
    margin-bottom: 5px;
    line-height: 1.4;
}

.gi-sample-path {
    font-size: 11px;
    color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.06);
    padding: 3px 6px;
    border-radius: 3px;
    margin-bottom: 5px;
}

.gi-book-quote {
    font-size: 10.5px;
    color: var(--text-dim);
    font-style: italic;
    margin-bottom: 5px;
}

/* 九大航權視覺化卡片 */
.freedom-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px;
    margin-bottom: 14px;
}

.freedom-header {
    margin-bottom: 10px;
}
.freedom-badge-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 3px;
}
.freedom-badge {
    font-size: 11px;
    font-weight: 800;
    color: var(--accent-rose);
    background: rgba(255, 93, 143, 0.12);
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid rgba(255, 93, 143, 0.3);
}
.freedom-title {
    font-size: 16px;
    font-weight: 800;
    color: var(--text-main);
}
.freedom-alias {
    font-size: 12.5px;
}

.freedom-def-box {
    background: var(--bg-secondary);
    border-left: 3px solid var(--accent-cyan);
    padding: 9px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 12px;
    margin-bottom: 14px;
    border: 1px solid var(--border-color);
    border-left-width: 3px;
}

/* 航權色塊關聯圖解 (圖8-1 ~ 8-9) - ABCD 四國標準一致化排版 (徹底防止跑版) */
.diagram-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 10px;
    margin-bottom: 14px;
}

.diagram-title {
    font-size: 12px;
    font-weight: 800;
    color: var(--accent-cyan);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* 航線營運與承運航司流向條 */
.fc-flow-banner {
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fc-flow-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
}

.fc-airline-tag {
    font-weight: 800;
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    gap: 5px;
}

.fc-flight-badge {
    font-size: 10.5px;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 3px;
    background: rgba(0, 240, 255, 0.18);
    color: var(--text-main);
    border: 1px solid rgba(0, 240, 255, 0.4);
}

.fc-flow-route {
    font-size: 12px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.2px;
}
[data-theme="light"] .fc-flow-route {
    color: #0f172a;
}

/* ABCD 4 國標準等寬格線 (1fr * 4，完全鎖定比例不擠壓) */
.fc-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 7px;
    margin: 10px 0;
}

.fc-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 6px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: all 0.2s ease;
    min-width: 0;
    box-shadow: var(--shadow-sm);
    text-align: center;
}

/* 4 國各自代表主題色彩 (與課本圖示完美呼應) */
.fc-card.fc-card-a.active {
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.22) 0%, rgba(79, 70, 229, 0.10) 100%);
    border: 1.5px solid #818cf8;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}
.fc-card.fc-card-b.active {
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.22) 0%, rgba(217, 119, 6, 0.10) 100%);
    border: 1.5px solid #f59e0b;
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
}
.fc-card.fc-card-c.active {
    background: linear-gradient(180deg, rgba(14, 165, 233, 0.22) 0%, rgba(2, 132, 199, 0.10) 100%);
    border: 1.5px solid #38bdf8;
    box-shadow: 0 0 10px rgba(14, 165, 233, 0.2);
}
.fc-card.fc-card-d.active {
    background: linear-gradient(180deg, rgba(16, 185, 129, 0.22) 0%, rgba(5, 150, 105, 0.10) 100%);
    border: 1.5px solid #34d399;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}

/* 特殊狀態樣式 */
.fc-card.flyover {
    background: linear-gradient(180deg, rgba(6, 182, 212, 0.18) 0%, rgba(8, 145, 178, 0.08) 100%);
    border: 1.5px dashed #22d3ee;
}
.fc-card.home-not-fly {
    background: rgba(99, 102, 241, 0.08);
    border: 1px dashed rgba(129, 140, 248, 0.6);
    opacity: 0.85;
}
.fc-card.inactive {
    background: rgba(15, 23, 42, 0.25);
    border: 1px dashed var(--border-color);
    opacity: 0.42;
}
[data-theme="light"] .fc-card.inactive {
    background: rgba(241, 245, 249, 0.6);
    opacity: 0.45;
}

.fc-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 4px;
}
[data-theme="light"] .fc-card-top {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.fc-card-name {
    font-size: 13px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.2;
}
.fc-card-a .fc-card-name { color: #a5b4fc; }
.fc-card-b .fc-card-name { color: #fde047; }
.fc-card-c .fc-card-name { color: #7dd3fc; }
.fc-card-d .fc-card-name { color: #6ee7b7; }
[data-theme="light"] .fc-card-a .fc-card-name { color: #4338ca; }
[data-theme="light"] .fc-card-b .fc-card-name { color: #b45309; }
[data-theme="light"] .fc-card-c .fc-card-name { color: #0369a1; }
[data-theme="light"] .fc-card-d .fc-card-name { color: #047857; }

.fc-card-role {
    font-size: 9.5px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 核心客貨裝卸動作徽章 */
.fc-card-badge {
    font-size: 10px;
    font-weight: 800;
    padding: 3px 4px;
    border-radius: 4px;
    margin: 2px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
}

.fc-badge-load {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.4);
}
.fc-badge-unload {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.4);
}
.fc-badge-both {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.4);
}
.fc-badge-tech {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.4);
}
.fc-badge-hub {
    background: rgba(168, 85, 247, 0.2);
    color: #c084fc;
    border: 1px solid rgba(168, 85, 247, 0.4);
}
.fc-badge-flyover {
    background: rgba(6, 182, 212, 0.2);
    color: #22d3ee;
    border: 1px solid rgba(6, 182, 212, 0.4);
}
.fc-badge-inactive {
    background: transparent;
    color: var(--text-dim);
    border: 1px dashed var(--border-color);
}

.fc-card-detail {
    font-size: 9.5px;
    color: var(--text-muted);
    line-height: 1.3;
    min-height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fc-card-ex {
    font-size: 9px;
    color: var(--text-dim);
    border-top: 1px dashed var(--border-color);
    padding-top: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 航段與客貨權限流向條 (Legs strip) */
.fc-legs-strip {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 7px 10px;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fc-leg-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
}

.fc-leg-nodes {
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    min-width: 75px;
}

.fc-leg-arrow-sym {
    font-weight: 900;
    color: var(--accent-cyan);
}

.fc-leg-desc {
    color: var(--text-main);
    flex: 1;
}

.diagram-note-banner {
    font-size: 11.5px;
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    margin-top: 10px;
    color: var(--accent-amber);
    line-height: 1.45;
}
.diagram-note-banner.info {
    background: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--accent-blue);
}

.cabotage-alert-box {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    font-size: 11.5px;
    margin-top: 8px;
    color: var(--accent-red);
    line-height: 1.45;
}

.freedom-example-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px;
}

.ex-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.ex-airline-tag {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--accent-cyan);
}

.ex-route-path {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 3px;
}
.ex-action-desc {
    font-size: 11px;
    color: var(--text-muted);
}

/* 航權對照表 */
.freedom-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11.5px;
}
.freedom-table th {
    background: var(--bg-card-hover);
    color: var(--accent-cyan);
    padding: 7px 9px;
    text-align: left;
    font-weight: 700;
    border-bottom: 1px solid var(--border-color);
}
.freedom-table td {
    padding: 7px 9px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}
.freedom-table tr:hover {
    background: rgba(0, 240, 255, 0.08);
    cursor: pointer;
}

/* 飛行時間與時區計算器樣式 */
.calc-form-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 14px;
}

.form-row {
    display: flex;
    gap: 8px;
}
.form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.form-label {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--text-muted);
}

.form-select, .form-input {
    padding: 7px 9px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 12.5px;
    outline: none;
    transition: border-color 0.2s;
}
.form-select:focus, .form-input:focus {
    border-color: var(--accent-cyan);
}

.tz-hint-text {
    font-size: 10.5px;
    color: var(--text-dim);
    min-height: 15px;
}

.dst-checkbox-label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    color: var(--text-muted);
    cursor: pointer;
    margin-top: 2px;
}

/* 課本範例快捷按鈕網格 */
.example-shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
    margin-bottom: 14px;
}

.ex-btn-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 7px 9px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
}
.ex-btn-card:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.08);
    transform: translateY(-1px);
}
.ex-btn-tag {
    font-size: 10px;
    font-weight: 800;
    color: var(--accent-cyan);
}
.ex-btn-title {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 1px;
}

/* 飛行時間結果詳解卡 */
.flight-route-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-secondary);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    padding: 12px;
    margin-bottom: 12px;
}

.route-node {
    display: flex;
    flex-direction: column;
}
.node-iata {
    font-size: 20px;
    font-weight: 900;
    color: var(--accent-cyan);
    font-family: var(--font-mono);
}
.node-city {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-main);
}
.node-time {
    font-size: 11.5px;
    color: #f59e0b;
}
.node-gmt {
    font-size: 10px;
    color: var(--text-dim);
}

.route-vector {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
}
.vector-flight-badge {
    font-size: 9.5px;
    text-transform: uppercase;
    background: rgba(0, 240, 255, 0.15);
    color: var(--accent-cyan);
    padding: 1px 5px;
    border-radius: 3px;
    font-weight: 700;
}
.vector-line {
    width: 70px;
    height: 2px;
    background: var(--accent-cyan);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.vector-line i {
    font-size: 12px;
    color: var(--accent-cyan);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 12px;
}

.calc-card {
    padding: 10px;
    border-radius: var(--radius-sm);
    font-size: 11.5px;
}
.calc-card.wrong-method {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.3);
}
.calc-card.correct-method {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.card-tag {
    font-weight: 800;
    margin-bottom: 5px;
}
.tag-red { color: var(--accent-red); }
.tag-green { color: var(--accent-emerald); }

.step-row {
    display: flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 5px;
    color: var(--text-main);
}
.step-num {
    width: 17px;
    height: 17px;
    background: rgba(16, 185, 129, 0.25);
    color: var(--accent-emerald);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 800;
    flex-shrink: 0;
}
.step-row.highlight {
    background: rgba(16, 185, 129, 0.15);
    padding: 5px;
    border-radius: 4px;
    font-size: 12.5px;
}

/* 課本範例詳細卡 */
.example-detail-view {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    padding: 14px;
}
.ex-header {
    margin-bottom: 8px;
}
.ex-tag {
    font-size: 10.5px;
    font-weight: 800;
    color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.15);
    padding: 2px 6px;
    border-radius: 3px;
}
.ex-title {
    font-size: 15px;
    font-weight: 800;
    color: var(--text-main);
    margin-top: 3px;
}
.ex-problem-box {
    background: var(--bg-secondary);
    border-left: 3px solid var(--accent-amber);
    padding: 9px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 10px;
    border: 1px solid var(--border-color);
    border-left-width: 3px;
}
.ex-problem-label {
    font-size: 11px;
    font-weight: 800;
    color: var(--accent-amber);
    margin-bottom: 3px;
}
.ex-problem-text {
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-main);
}
.ex-solution-box {
    background: var(--bg-secondary);
    border-left: 3px solid var(--accent-emerald);
    padding: 9px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 10px;
    border: 1px solid var(--border-color);
    border-left-width: 3px;
}
.ex-solution-label {
    font-size: 11px;
    font-weight: 800;
    color: var(--accent-emerald);
    margin-bottom: 5px;
}
.ex-step-list {
    padding-left: 16px;
    font-size: 12px;
    line-height: 1.55;
    color: var(--text-main);
}
.ex-answer-banner {
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid var(--accent-cyan);
    border-radius: var(--radius-sm);
    padding: 9px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.ans-label {
    font-size: 11.5px;
    font-weight: 800;
    color: var(--accent-cyan);
}
.ans-val {
    font-size: 13px;
    font-weight: 900;
    color: var(--text-main);
}

/* 隨堂測驗樣式 */
.quiz-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
}
.quiz-progress-bar {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 10px;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #00f0ff, #3b82f6);
    transition: width 0.3s;
}
.quiz-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11.5px;
    margin-bottom: 10px;
    color: var(--text-muted);
}
.quiz-question-box {
    margin-bottom: 14px;
}
.quiz-question-title {
    font-size: 14.5px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.5;
}
.quiz-options-list {
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin-bottom: 14px;
}
.quiz-opt-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 9px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 12.5px;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
}
.quiz-opt-btn:hover:not(:disabled) {
    border-color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.08);
}
.quiz-opt-btn.correct {
    border-color: #10b981;
    background: rgba(16, 185, 129, 0.18);
    color: #059669;
}
.quiz-opt-btn.wrong {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.18);
    color: #dc2626;
}
.quiz-opt-btn.disabled {
    opacity: 0.6;
    cursor: default;
}
.opt-prefix {
    font-weight: 800;
    margin-right: 7px;
    color: var(--accent-cyan);
}
.opt-text {
    flex: 1;
}
.opt-icon {
    font-size: 11.5px;
    font-weight: 800;
}
.quiz-expl-box {
    padding: 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    margin-bottom: 14px;
}
.quiz-expl-box.expl-correct {
    background: rgba(16, 185, 129, 0.1);
    border-left: 3px solid #10b981;
    color: #059669;
}
.quiz-expl-box.expl-wrong {
    background: rgba(239, 68, 68, 0.1);
    border-left: 3px solid #ef4444;
    color: #dc2626;
}
.expl-title {
    font-weight: 800;
    margin-bottom: 3px;
}
.quiz-nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 測驗結果卡 */
.result-card {
    padding: 24px 16px;
}
.result-trophy {
    font-size: 44px;
    margin-bottom: 10px;
}
.result-title {
    font-size: 17px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 6px;
}
.final-score {
    margin-bottom: 12px;
}
.score-num {
    font-size: 38px;
    font-family: var(--font-mono);
}
.score-unit {
    font-size: 16px;
    color: var(--text-dim);
}
.result-comment {
    font-size: 12.5px;
    color: var(--text-muted);
    max-width: 320px;
    margin: 0 auto 16px auto;
}
.result-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.animate-fade-in {
    animation: fadeIn 0.2s ease-out;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(3px); }
    to { opacity: 1; transform: translateY(0); }
}

.text-cyan { color: var(--accent-cyan) !important; }
.text-danger { color: var(--accent-red) !important; }
.font-bold { font-weight: 700 !important; }
.font-mono { font-family: var(--font-mono) !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

/* 響應式佈局：保證寬度 >= 860px 時維持左右並排雙欄 */
@media (max-width: 860px) {
    .main-stage {
        flex-direction: column;
    }
    .map-view-wrapper {
        height: 52vh;
    }
    .teaching-panel-wrapper {
        width: 100%;
        min-width: 100%;
        max-width: 100%;
        height: 48vh;
        border-left: none;
        border-top: 1px solid var(--border-color);
    }
    body.panel-collapsed .map-view-wrapper {
        height: calc(100vh - 60px);
    }
    .header-center {
        display: none;
    }
}