/* ========================================
   CSS Variables - Theme System
   ======================================== */
:root {
    /* Light Theme (default) */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: rgba(59, 130, 246, 0.1);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.3);
    --track-color: #3b82f6;
    --track-glow: rgba(59, 130, 246, 0.4);
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --accent-color: #60a5fa;
    --accent-hover: #93c5fd;
    --accent-light: rgba(96, 165, 250, 0.15);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --glass-bg: rgba(30, 41, 59, 0.85);
    --glass-border: rgba(51, 65, 85, 0.5);
    --track-color: #60a5fa;
    --track-glow: rgba(96, 165, 250, 0.5);
}

/* ========================================
   Base Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ========================================
   Layout
   ======================================== */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* ========================================
   Header
   ======================================== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
}

.logo i {
    font-size: 1.5rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ========================================
   Map
   ======================================== */
.map-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.map-container {
    width: 100%;
    height: 100%;
    background: var(--bg-tertiary);
}

/* Map Controls */
.map-controls {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 10;
}

/* ========================================
   Upload Overlay
   ======================================== */
.upload-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    z-index: 50;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.upload-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.upload-box {
    text-align: center;
    padding: 3rem 4rem;
    background: var(--bg-secondary);
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 2px dashed var(--border-color);
    transition: border-color 0.3s ease, transform 0.3s ease;
}

.upload-box:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.upload-box.drag-over {
    border-color: var(--accent-color);
    background: var(--accent-light);
}

.upload-box i {
    font-size: 4rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.upload-box h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.upload-box p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* ========================================
   Data Panel (Expandable) - Max 1/4 Screen
   ======================================== */
.data-panel {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    display: flex;
    flex-direction: column;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-radius: 0.75rem;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-md);
    z-index: 10;
    /* 限制最大宽高为屏幕的50%，面积约为1/4 */
    max-width: min(280px, 45vw);
    max-height: 45vh;
    min-width: 140px;
    transition: opacity 0.3s ease, transform 0.3s ease, max-width 0.3s ease;
    overflow: hidden;
}

.data-panel.hidden {
    opacity: 0;
    transform: translateX(-20px);
    pointer-events: none;
}

.data-panel.expanded {
    max-width: min(420px, 55vw);
    max-height: 50vh;
}

/* Data Summary Section - Grid布局固定列数 */
.data-summary {
    display: grid;
    /* 固定3列布局，防止波动 */
    grid-template-columns: repeat(3, 1fr);
    gap: 0.25rem 0.5rem;
    padding: 0.5rem 0.625rem;
    overflow-y: auto;
    max-height: 25vh;
}

.data-item {
    display: flex;
    flex-direction: column;
    gap: 0.0625rem;
    min-width: 0;
    /* 允许收缩 */
}

.data-item.clickable {
    cursor: pointer;
    padding: 0.25rem;
    margin: -0.25rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s ease;
}

.data-item.clickable:hover {
    background: var(--accent-light);
}

.data-item.clickable .data-label i {
    font-size: 0.5rem;
    margin-left: 0.125rem;
    opacity: 0.6;
}

.data-label {
    font-size: 0.5rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.data-value {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Panel Toggle Button - 紧凑 */
.panel-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
    cursor: pointer;
    border-top: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
}

.panel-toggle:hover {
    background: var(--accent-light);
}

.panel-toggle i {
    font-size: 0.625rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.data-panel.expanded .panel-toggle i {
    transform: rotate(180deg);
}

/* Charts Container - 固定3列布局与数据项对应 */
.charts-container {
    display: grid;
    /* 固定3列，与数据项对应 */
    grid-template-columns: repeat(3, 1fr);
    gap: 0.25rem;
    padding: 0 0.5rem 0.5rem;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
}

.charts-container.collapsed {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
}

.data-panel.expanded .charts-container {
    /* PC端固定高度 */
    max-height: 180px;
    opacity: 1;
    padding: 0 0.5rem 0.5rem;
}

/* Chart Wrapper - 紧凑设计 */
.chart-wrapper {
    background: var(--bg-secondary);
    border-radius: 0.375rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.125rem 0.375rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.chart-title {
    font-size: 0.4375rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.chart-body {
    position: relative;
    /* 使用视口单位，小屏幕自动缩小 */
    height: min(45px, 6vh);
    padding: 0.125rem;
}

.chart-body canvas {
    width: 100% !important;
    height: 100% !important;
}

/* Chart Color Coding (顺序：配速/心率/海拔) */
.chart-wrapper:nth-child(1) .chart-header {
    border-left: 3px solid #34d399;
    /* Pace - Green */
}

.chart-wrapper:nth-child(2) .chart-header {
    border-left: 3px solid #f472b6;
    /* Heart Rate - Pink */
}

.chart-wrapper:nth-child(3) .chart-header {
    border-left: 3px solid #60a5fa;
    /* Altitude - Blue */
}

/* ========================================
   Player Controls
   ======================================== */
.player-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.player-controls.hidden {
    opacity: 0;
    transform: translateY(100%);
    pointer-events: none;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

/* Timeline */
.player-timeline {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.time-display {
    font-size: 0.875rem;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    color: var(--text-secondary);
    min-width: 60px;
}

.timeline {
    flex: 1;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    position: relative;
    cursor: pointer;
    transition: height 0.2s ease;
}

.timeline:hover {
    height: 12px;
}

.timeline-progress {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), var(--track-color));
    border-radius: 4px;
    width: 0%;
    /* 移除过渡动画以确保及时更新 */
}

.timeline-handle {
    position: absolute;
    top: 50%;
    left: 0%;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border: 2px solid var(--bg-secondary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    cursor: grab;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    z-index: 1;
}

.timeline-handle:hover {
    transform: translate(-50%, -50%) scale(1.2);
    box-shadow: 0 0 0 4px var(--track-glow);
}

.timeline-handle:active {
    cursor: grabbing;
}

/* Player Buttons */
.player-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1.5rem;
    padding-left: 1.5rem;
    border-left: 1px solid var(--border-color);
}

.speed-control label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.speed-select {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.speed-select:hover {
    border-color: var(--accent-color);
}

.speed-select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-light);
}

/* ========================================
   Buttons
   ======================================== */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.btn-icon:active {
    transform: scale(0.95);
}

.btn-play {
    width: 48px;
    height: 48px;
    font-size: 1.125rem;
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    border: none;
    border-radius: 0.75rem;
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    margin-left: 1.5rem;
    transition: all 0.2s ease;
}

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

/* ========================================
   Utilities
   ======================================== */
.hidden {
    display: none !important;
}

/* ========================================
   Animations
   ======================================== */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Responsive - Multi-breakpoint Layout
   ======================================== */

/* 平板及以上 - 图表横向排列 */
@media (min-width: 769px) {
    .data-panel.expanded {
        max-width: 600px;
    }

    .charts-container {
        grid-template-columns: repeat(3, 1fr);
    }

    .chart-body {
        height: 100px;
    }
}

/* PC 横屏 - 大屏优化 */
@media (min-width: 1025px) and (orientation: landscape) {
    .data-panel {
        max-width: 400px;
    }

    .data-panel.expanded {
        max-width: 700px;
    }

    .data-panel.expanded .charts-container {
        max-height: 200px;
    }

    .data-summary {
        grid-template-columns: repeat(5, 1fr);
        gap: 0.5rem;
    }

    .charts-container {
        grid-template-columns: repeat(3, 1fr);
    }

    .chart-body {
        height: 100px;
    }
}

/* 平板/小屏PC */
@media (min-width: 769px) and (max-width: 1024px) {
    .data-panel.expanded {
        max-width: 550px;
    }

    .charts-container {
        grid-template-columns: repeat(3, 1fr);
    }

    .chart-body {
        height: 90px;
    }
}

/* 移动端横屏 */
@media (max-width: 768px) and (orientation: landscape) {
    .data-panel {
        top: 0.5rem;
        left: 0.5rem;
        max-width: 280px;
    }

    .data-panel.expanded {
        max-width: 480px;
    }

    .data-summary {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.5rem;
        padding: 0.75rem;
    }

    .data-item {
        min-width: 70px;
    }

    .data-value {
        font-size: 0.875rem;
    }

    .data-label {
        font-size: 0.625rem;
    }

    .charts-container {
        grid-template-columns: repeat(3, 1fr);
    }

    .chart-body {
        height: 70px;
    }

    .chart-title {
        font-size: 0.625rem;
    }

    .player-controls {
        padding: 0.5rem 1rem;
    }
}

/* 移动端竖屏 - 紧凑布局 */
@media (max-width: 480px) {
    .header {
        padding: 0.375rem 0.75rem;
    }

    .logo span {
        display: none;
    }

    .upload-box {
        padding: 1.5rem;
        margin: 0.75rem;
    }

    /* 数据面板 - 使用视口单位限制 */
    .data-panel {
        top: 0.375rem;
        left: 0.375rem;
        right: auto;
        max-width: min(160px, 42vw);
        min-width: 100px;
        border-radius: 0.5rem;
    }

    .data-panel.expanded {
        max-width: min(240px, 60vw);
    }

    /* 移动端数据项 - 固定2列 */
    .data-summary {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.125rem 0.375rem;
        padding: 0.375rem 0.5rem;
    }

    /* 第5个数据项(海拔)跨2列居中 */
    .data-item:nth-child(5) {
        grid-column: 1 / -1;
        justify-self: center;
        max-width: 50%;
    }

    .data-item.clickable {
        padding: 0.125rem;
        margin: -0.125rem;
    }

    .data-value {
        font-size: 0.625rem;
    }

    .data-label {
        font-size: 0.4375rem;
    }

    /* 面板展开按钮 */
    .panel-toggle {
        padding: 0.125rem;
    }

    .panel-toggle i {
        font-size: 0.5rem;
    }

    /* 图表容器 - 固定3列 */
    .charts-container {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.125rem;
        padding: 0 0.25rem 0.25rem;
    }

    .data-panel.expanded .charts-container {
        max-height: min(80px, 10vh);
        padding: 0 0.25rem 0.25rem;
    }

    .chart-wrapper {
        border-radius: 0.25rem;
    }

    .chart-header {
        padding: 0.0625rem 0.125rem;
    }

    .chart-body {
        height: min(28px, 3.5vh);
        padding: 0.0625rem;
    }

    .chart-title {
        font-size: 0.3125rem;
    }

    /* 播放控制 */
    .player-controls {
        padding: 0.5rem 0.75rem;
    }

    .player-buttons {
        flex-wrap: wrap;
        gap: 0.375rem;
    }

    .btn-icon {
        width: 32px;
        height: 32px;
    }

    .btn-play {
        width: 36px;
        height: 36px;
    }

    .speed-control {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
    }

    .speed-control label {
        font-size: 0.625rem;
    }

    .speed-select {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }

    .btn-secondary {
        margin-left: 0;
        font-size: 0.625rem;
        padding: 0.375rem 0.5rem;
    }

    .time-display {
        font-size: 0.625rem;
        min-width: 45px;
    }
}

/* 超小屏幕 - 极简布局 */
@media (max-width: 360px) {
    .data-panel {
        max-width: 150px;
    }

    .data-panel.expanded {
        max-width: 280px;
    }

    .data-value {
        font-size: 0.625rem;
    }

    .chart-body {
        height: 35px;
    }

    .player-timeline {
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .time-display {
        font-size: 0.5rem;
        min-width: 40px;
    }

    .btn-icon {
        width: 28px;
        height: 28px;
    }

    .btn-play {
        width: 32px;
        height: 32px;
    }
}