/* MNIST 智能分析平台 - 现代化样式设计 */

/* 基础重置和变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 科技蓝色系 */
    --primary-color: #4A90E2;
    --primary-color-rgb: 74, 144, 226;
    --primary-dark: #357ABD;
    --primary-light: #6BA3EC;
    
    /* 辅助色 */
    --secondary-color: #7B68EE;
    --accent-color: #FF6B6B;
    --success-color: #51CF66;
    --warning-color: #FFD93D;
    --danger-color: #FF6B6B;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    
    /* 背景色 */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-dark: #1a202c;
    --bg-overlay: rgba(0, 0, 0, 0.1);
    
    /* 文字颜色 */
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --text-white: #ffffff;
    
    /* 边框和阴影 */
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.2);
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* 字体 */
    --font-primary: 'Inter', 'Microsoft YaHei', sans-serif;
    --font-code: 'Fira Code', 'Consolas', monospace;
}

/* 全局样式 */
body {
    font-family: var(--font-primary);
    background: var(--gradient-primary);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    margin-top: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-height: calc(100vh - 4rem);
}

/* 头部样式 */
header {
    text-align: center;
    padding: var(--spacing-lg) 0;
    background: var(--gradient-primary);
    margin: -var(--spacing-md) -var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    color: var(--text-white);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 标签页导航 */
.tab-nav {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-primary);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.tab-btn:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.tab-btn.active {
    background: var(--primary-color);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

/* 标签页内容 */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-content h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--primary-color);
    padding-left: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tab-content h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-bottom: 10px;
}

/* 模型选择区域 */
.model-selection-section {
    margin-bottom: var(--spacing-xl);
}

.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* 模型卡片 */
.model-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.model-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transition: left 0.3s ease;
}

.model-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.model-card:hover::before {
    left: 0;
}

.model-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.model-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.attention-badge {
    background: var(--gradient-success);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.model-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.model-info {
    margin-bottom: var(--spacing-md);
}

.parameter-count {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
}

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

.parameter-count .value {
    color: var(--primary-color);
    font-weight: 600;
    font-family: var(--font-code);
}

/* 模型选择复选框 */
.model-checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: background-color 0.2s ease;
}

.model-checkbox-container:hover {
    background: var(--bg-primary);
}

.model-checkbox {
    margin-right: var(--spacing-sm);
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.checkbox-label {
    font-weight: 500;
    color: var(--text-primary);
}

/* 训练参数设置 */
.training-parameters-section {
    margin-bottom: var(--spacing-xl);
}

.parameters-panel {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.parameter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.parameter-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.parameter-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

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

.parameter-slider {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.parameter-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.parameter-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

.slider-value {
    min-width: 40px;
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
    background: var(--bg-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.parameter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.parameter-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* 按钮样式 */
.training-controls {
    text-align: right;
    margin-bottom: 0;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid transparent;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(var(--primary-color-rgb), 0.2);
}

.btn-primary:hover:not(:disabled) {
    color: var(--text-white);
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(1px);
    box-shadow: none;
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 进度条区域 */
#training-progress-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.training-progress-item {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.progress-model-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.progress-status {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-queued {
    background: var(--bg-primary);
    color: var(--text-secondary);
}

.status-running {
    background: var(--primary-color);
    color: var(--text-white);
    animation: pulse 2s infinite;
}

.status-completed {
    background: var(--success-color);
    color: var(--text-white);
}

.status-failed {
    background: var(--danger-color);
    color: var(--text-white);
}

.progress-bar-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-percentage {
    min-width: 50px;
    text-align: right;
    font-weight: 600;
    color: var(--primary-color);
}

.progress-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.metric {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
    text-align: center;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.metric-value {
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-code);
}

/* 消息提示 */
.error-message, .success-message {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    max-width: 400px;
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    animation: slideIn 0.3s ease;
}

.error-message {
    background: #fee;
    border-left: 4px solid var(--danger-color);
    color: #721c24;
}

.success-message {
    background: #f0fff4;
    border-left: 4px solid var(--success-color);
    color: #22543d;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.error-content, .success-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.error-close, .success-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: auto;
    opacity: 0.7;
}

.error-close:hover, .success-close:hover {
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        margin: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    
    .model-grid {
        grid-template-columns: 1fr;
    }
    
    .parameter-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-nav {
        flex-direction: column;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .progress-metrics {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .progress-metrics {
        grid-template-columns: 1fr;
    }
    
    .progress-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}

/* 新纪录样式 */
.training-progress-item.new-record {
    background: rgba(255, 215, 0, 0.15);
    border: 1px solid rgba(255, 215, 0, 0.3);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
    animation: recordGlow 2s ease-in-out infinite alternate;
}

@keyframes recordGlow {
    from {
        box-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
    }
    to {
        box-shadow: 0 0 30px rgba(255, 215, 0, 0.4);
    }
}

.new-record-badge {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #8b4513;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
    margin-left: 0.5rem;
    display: inline-flex;
    align-items: center;
    animation: bounce 1.5s ease-in-out infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-5px);
    }
    60% {
        transform: translateY(-3px);
    }
}

.progress-fill.record {
    background: linear-gradient(90deg, #ffd700, #ffed4e);
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

/* 手写识别页面样式 */
.recognition-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    align-items: start;
}

.drawing-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.canvas-container {
    position: relative;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius);
    background: #000;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.canvas-container:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

#drawing-canvas {
    display: block;
    border-radius: calc(var(--border-radius) - 3px);
    cursor: crosshair;
    background: #000;
}

.canvas-controls {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.brush-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.brush-size-slider {
    width: 100px;
    height: 4px;
    border-radius: 2px;
    background: var(--border-color);
    outline: none;
    appearance: none;
}

.brush-size-slider::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: var(--shadow-sm);
}

.brush-size-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: var(--shadow-sm);
}

.brush-size-value {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.prediction-area {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.model-selector {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.model-selector label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

#prediction-model-select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
}

#prediction-model-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.prediction-controls {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

#prediction-result {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.prediction-display {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    color: var(--text-white);
}

.predicted-digit {
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.confidence-score {
    font-size: 1.2rem;
    opacity: 0.9;
}

.probabilities-container {
    margin-top: var(--spacing-md);
}

.probabilities-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.probability-bars {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-sm);
}

.probability-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.probability-digit {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.probability-bar {
    width: 100%;
    height: 60px;
    background: var(--border-color);
    border-radius: var(--border-radius-sm);
    position: relative;
    overflow: hidden;
}

.probability-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-sm);
    transition: height 0.5s ease;
}

.probability-fill.highest {
    background: var(--gradient-success);
    box-shadow: 0 0 10px rgba(81, 207, 102, 0.3);
}

.probability-value {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 2px;
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 0.8s ease-in-out infinite;
}

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

.empty-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-secondary);
    height: 200px;
}

.empty-result-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-result-text {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.empty-result-hint {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 响应式设计 - 手写识别页面 */
@media (max-width: 968px) {
    .recognition-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .drawing-area {
        order: 1;
    }
    
    .prediction-area {
        order: 2;
    }
}

@media (max-width: 480px) {
    #drawing-canvas {
        width: 240px;
        height: 240px;
    }
    
    .canvas-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .probability-bars {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .predicted-digit {
        font-size: 3rem;
    }
}

/* =================================
   9. History Table
   ================================= */

.history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background-color: var(--surface-color);
}

.history-table th,
.history-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.history-table th {
    background-color: var(--bg-primary);
    font-weight: 600;
    color: var(--text-secondary);
    position: sticky;
    top: 0;
}

.history-table th[data-sort-key] {
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.history-table th[data-sort-key]:hover {
    background-color: #e9ecef; /* 浅灰色高亮 */
}

.history-table th.sorted-asc::after,
.history-table th.sorted-desc::after {
    margin-left: 0.5em;
    font-size: 0.8em;
    color: var(--primary-color);
}

.history-table th.sorted-asc::after {
    content: '▲';
}

.history-table th.sorted-desc::after {
    content: '▼';
}

.history-table .accuracy-cell {
    font-weight: 600;
    color: var(--primary-dark);
}

.history-main-row {
    transition: background-color 0.3s ease;
}

.history-main-row.is-expanded {
    background-color: var(--surface-light-color);
}

.history-details-row {
    display: none; /* 默认隐藏 */
}

.history-details-row.visible {
    display: table-row; /* 点击后显示 */
}

.history-details-row td {
    padding: 0;
    border: 0;
    background: var(--surface-light-color);
}

.details-card {
    padding: 20px;
    margin: 0 10px 10px 10px;
    background: var(--background-color);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.details-card h4 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    font-size: 14px;
}

.details-grid > div {
    display: flex;
    flex-direction: column;
}

.details-grid strong {
    color: var(--text-secondary-color);
    margin-bottom: 5px;
    font-weight: 500;
}

.details-grid .job-id-span {
    font-family: 'Courier New', Courier, monospace;
    font-size: 12px;
    color: #888;
    word-break: break-all;
}

.btn-details {
    transition: transform 0.3s ease;
}

.history-main-row.is-expanded .btn-details {
    transform: rotate(180deg);
}

/* =================================
   10. Model Comparison
   ================================= */
.comparison-controls {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

#model-selection-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-left: var(--spacing-lg);
    align-items: center;
}

.model-checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    background-color: var(--bg-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease-in-out;
}

.model-checkbox-label:hover {
    background-color: var(--bg-secondary);
    border-color: var(--primary-color);
}

.model-checkbox-label input[type="checkbox"] {
    margin-right: var(--spacing-sm);
    accent-color: var(--primary-color);
}

.charts-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.chart-wrapper {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    position: relative;
    height: 400px; /* 固定高度防止循环拉伸 */
}

.chart-wrapper canvas {
    width: 100% !important;
    height: 100% !important; /* 让图表完全填充容器 */
}

.chart-wrapper h3 {
    text-align: center;
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* =================================
   11. Comparison Status Bar
   ================================= */

#comparison-status-bar {
    position: sticky;
    top: 0;
    background-color: var(--primary-dark);
    color: var(--text-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    display: none; /* 默认隐藏 */
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-lg);
}

#comparison-status-bar.visible {
    display: flex;
    animation: fadeIn 0.3s ease;
}

#comparison-status-text {
    font-weight: 500;
}

#compare-now-btn {
    background-color: var(--accent-color);
    color: var(--text-white);
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

#compare-now-btn:hover {
    background-color: #d63031; /* accent-color 的深色变体 */
}

/* 表格中的对比按钮 */
.btn-compare {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 4px 8px;
    font-size: 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-compare:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.btn-compare.added {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: var(--text-white);
}

.status-badge.status-error {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ef9a9a;
}

/* 移除丑陋的、嵌入式的详情行样式 */
.details-row {
    display: none; /* 彻底隐藏旧的实现 */
}

/* =================================================================
   12. 详情模态框 (Modal) 样式
================================================================= */

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-backdrop.visible {
    opacity: 1;
}

.modal-content {
    background-color: #fefefe; /* 浅色背景 */
    color: #333; /* 深色文字 */
    margin: 5% auto;
    padding: 0; /* 移除内边距，让header/body/footer自己控制 */
    border: 1px solid #ddd;
    width: 90%;
    max-width: 1200px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: slideDown 0.5s ease-out;
}

.modal-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background-color: #f0f0f0; /* 头部浅灰色背景 */
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.modal-close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    font-weight: bold;
    color: #555; /* 关闭按钮颜色 */
    cursor: pointer;
    padding: 0 1rem;
    line-height: 1;
    transition: color 0.2s ease;
}

.modal-close-btn:hover {
    color: #000; /* 悬停时变黑 */
}

#modal-body {
    padding: var(--spacing-lg);
    max-height: 70vh;
    overflow-y: auto;
}

#modal-body .details-content {
    display: flex;
    gap: var(--spacing-lg);
}

#modal-body .details-chart {
    flex: 2;
    min-width: 0;
}

#modal-body .details-info {
    flex: 1;
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
}

#modal-body h4 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: var(--spacing-xs);
}

#modal-body .epoch-table-container {
    margin-top: var(--spacing-lg);
}

/* 核心指标卡片容器 */
.metrics-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.metric-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric-icon {
    font-size: 2rem;
    opacity: 0.8;
}

.metric-content {
    flex: 1;
}

.metric-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.metric-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.metric-value.highlight {
    color: var(--primary-color);
    font-size: 1.4rem;
}

/* 主要内容区域 */
.details-main-content {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.chart-section {
    flex: 2;
    display: flex;
    flex-direction: column;
}

.info-sidebar {
    flex: 1;
    background-color: var(--surface-light-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
}

/* 图表标签页样式 */
.chart-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: var(--spacing-md);
}

.chart-tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: transparent;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.chart-tab-btn:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.chart-tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: var(--bg-secondary);
}

.chart-tab-content {
    display: none;
    flex: 1;
}

.chart-tab-content.active {
    display: block;
}

.info-grid {
    display: grid;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.info-grid > div {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--border-color);
}

.info-section {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm);
    border-left: 4px solid var(--primary-color);
    background-color: rgba(var(--primary-color-rgb), 0.03);
}

.info-section h4 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}



.chart-container {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm);
    height: 300px;
}

/* 可折叠表格样式 */
.epoch-table-section {
    margin-top: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: white;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.section-header:hover {
    background-color: var(--border-color);
}

.section-header h4 {
    margin: 0;
    color: var(--text-primary);
}

.collapse-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.collapse-btn:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

.collapse-icon {
    font-size: 1rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.epoch-table-container {
    max-height: 400px;
    overflow-y: auto;
    border-top: 1px solid var(--border-color);
}

.details-epoch-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-sm);
}

.details-epoch-table th,
.details-epoch-table td {
    padding: var(--spacing-xs) var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.details-epoch-table th {
    background-color: var(--surface-light-color);
    font-weight: 600;
}

.modal-footer {
    padding: var(--spacing-md);
    text-align: right;
    border-top: 1px solid var(--border-color);
    background-color: #f0f0f0; /* 尾部浅灰色背景 */
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* =================================================================
   13. 超参数对比样式
================================================================= */

.hyperparameter-comparison-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
}

.comparison-section {
    margin-bottom: var(--spacing-xl);
}

.comparison-section h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: var(--spacing-xs);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-sm);
    background-color: white;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.comparison-table th {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
}

.comparison-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.comparison-table tbody tr:nth-child(even) {
    background-color: var(--surface-light-color);
}

.comparison-table tbody tr:hover {
    background-color: var(--hover-color);
    transition: background-color 0.2s ease;
}

.comparison-table td:first-child {
    font-weight: 600;
    color: var(--primary-color);
}

/* 响应式布局 */
@media (max-width: 968px) {
    .metrics-cards-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .details-main-content {
        flex-direction: column;
    }
    
    .chart-section, .info-sidebar {
        flex: 1;
    }
}

@media (max-width: 768px) {
    .metrics-cards-container {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 2% auto;
    }
    
    .chart-container {
        height: 250px;
    }
    
    .comparison-table {
        font-size: 0.8rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .hyperparameter-comparison-section {
        margin-top: var(--spacing-lg);
        padding-top: var(--spacing-md);
    }
}

.modal-body {
    padding: 20px 25px;
    max-height: calc(90vh - 120px);
    overflow-y: auto;
}

.metrics-cards-container {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    margin-bottom: 20px;
}

.metric-card {
    background-color: #ffffff;
    border-radius: 12px;
    border: 1px solid #e9ecef;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1 1 160px; /* Flex-grow, flex-shrink, basis */
    min-width: 160px;
    transition: all 0.2s ease-in-out;
}

.metric-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.metric-icon {
    font-size: 24px;
    background-color: #f0f3ff;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.metric-content {
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: 13px;
    color: #6c757d;
    margin-bottom: 2px;
}

.metric-value {
    font-size: 16px;
    font-weight: 600;
    color: #343a40;
}

.metric-value.highlight {
    color: #0056b3;
    font-weight: bold;
}


.details-main-content {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.chart-section {
    flex: 2;
    display: flex;
    flex-direction: column;
}

.info-sidebar {
    flex: 1;
    background-color: var(--surface-light-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
}

/* 图表标签页样式 */
.chart-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: var(--spacing-md);
}

.chart-tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: transparent;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.chart-tab-btn:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.chart-tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: var(--bg-secondary);
}

.chart-tab-content {
    display: none;
    flex: 1;
}

.chart-tab-content.active {
    display: block;
}

.info-grid {
    display: grid;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.info-grid > div {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--border-color);
}

.info-section {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm);
    border-left: 4px solid var(--primary-color);
    background-color: rgba(var(--primary-color-rgb), 0.03);
}

.info-section h4 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}



.chart-container {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm);
    height: 300px;
}

/* 可折叠表格样式 */
.epoch-table-section {
    margin-top: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: white;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.section-header:hover {
    background-color: var(--border-color);
}

.section-header h4 {
    margin: 0;
    color: var(--text-primary);
}

.collapse-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.collapse-btn:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

.collapse-icon {
    font-size: 1rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.epoch-table-container {
    max-height: 400px;
    overflow-y: auto;
    border-top: 1px solid var(--border-color);
}

.details-epoch-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-sm);
}

.details-epoch-table th,
.details-epoch-table td {
    padding: var(--spacing-xs) var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.details-epoch-table th {
    background-color: var(--surface-light-color);
    font-weight: 600;
}

.modal-footer {
    padding: var(--spacing-md);
    text-align: right;
    border-top: 1px solid var(--border-color);
    background-color: #f0f0f0; /* 尾部浅灰色背景 */
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* =================================================================
   13. 超参数对比样式
================================================================= */

.hyperparameter-comparison-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
}

.comparison-section {
    margin-bottom: var(--spacing-xl);
}

.comparison-section h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: var(--spacing-xs);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-sm);
    background-color: white;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.comparison-table th {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
}

.comparison-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.comparison-table tbody tr:nth-child(even) {
    background-color: var(--surface-light-color);
}

.comparison-table tbody tr:hover {
    background-color: var(--hover-color);
    transition: background-color 0.2s ease;
}

.comparison-table td:first-child {
    font-weight: 600;
    color: var(--primary-color);
}

/* 响应式布局 */
@media (max-width: 968px) {
    .metrics-cards-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .details-main-content {
        flex-direction: column;
    }
    
    .chart-section, .info-sidebar {
        flex: 1;
    }
}

@media (max-width: 768px) {
    .metrics-cards-container {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 2% auto;
    }
    
    .chart-container {
        height: 250px;
    }
    
    .comparison-table {
        font-size: 0.8rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .hyperparameter-comparison-section {
        margin-top: var(--spacing-lg);
        padding-top: var(--spacing-md);
    }
}

/* =================================================================
// 5. Button System (Ant Design Inspired)
// ================================================================= */

/* Generic Button Base - The "Body Type" for all buttons */
.btn,
button,
input[type="submit"],
input[type="button"],
input[type="reset"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    padding: 8px 16px; /* Consistent height and padding */
    font-size: 0.95rem;
    border-radius: var(--border-radius-sm); /* Consistent corner rounding */
    transition: all 0.2s ease-in-out;
    line-height: 1.5;
    white-space: nowrap;
}

/* Primary Button - The "Blue Suit" */
.btn-primary,
#start-training-btn,
#predict-btn {
    color: var(--text-white);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.045);
}

.btn-primary:hover:not(:disabled),
#start-training-btn:hover:not(:disabled),
#predict-btn:hover:not(:disabled) {
    color: var(--text-white);
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled),
#start-training-btn:active:not(:disabled),
#predict-btn:active:not(:disabled) {
    transform: translateY(1px);
    box-shadow: none;
}


/* Secondary Button - The "Ghost Dress" */
.btn-secondary,
.btn-details {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled),
.btn-details:hover:not(:disabled) {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background-color: rgba(74, 144, 226, 0.05);
}

/* Compare Button - Special Secondary */
.btn-compare {
    color: var(--success-color);
    background-color: rgba(46, 204, 113, 0.1);
    border-color: transparent;
}

.btn-compare.added {
    color: var(--text-secondary);
    background-color: var(--border-color);
}

.btn-compare:hover:not(.added) {
    background-color: rgba(46, 204, 113, 0.2);
}


/* Danger Button - The "Red Warning Robe" (for future use) */
.btn-danger {
    color: var(--text-white);
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-danger:hover:not(:disabled) {
    background-color: #ff7875;
    border-color: #ff7875;
}


/* Disabled State */
.btn:disabled,
button:disabled {
    color: rgba(0, 0, 0, 0.25);
    background-color: #f5f5f5;
    border-color: var(--border-color);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}


/* Overwrite old button styles */
.training-controls {
    text-align: right; /* Align button to the right */
    margin-bottom: 0; /* Remove old margin */
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid transparent;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(var(--primary-color-rgb), 0.2);
}

.btn-primary:hover:not(:disabled) {
    color: var(--text-white);
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(1px);
    box-shadow: none;
}


/* 清除画笔等次要按钮 */
#clear-canvas-btn {
    width: 100%;
}


/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 1s ease-in-out infinite;
}

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