/* 在线演示样式 */
.demo-container {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.demo-header {
    text-align: center;
    padding: 40px 20px;
    color: white;
}

.demo-header h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.demo-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.demo-nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    flex-wrap: wrap;
}

.nav-item {
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.demo-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.demo-section {
    display: none;
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.demo-section.active {
    display: block;
    animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.demo-section h2 {
    color: #333;
    margin-bottom: 30px;
    font-size: 2rem;
    text-align: center;
}

.demo-player-container {
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.demo-player {
    width: 100%;
    height: 400px;
}

.demo-controls {
    display: flex;
    gap: 15px;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.demo-controls button {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    background: #007bff;
    color: white;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.demo-controls button:hover {
    background: #0056b3;
    transform: translateY(-2px);
}

.demo-controls button:active {
    transform: translateY(0);
}

.demo-controls input[type="range"] {
    width: 150px;
    margin: 0 10px;
}

.demo-controls span {
    font-weight: 500;
    color: #007bff;
    min-width: 50px;
}

.demo-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
}

.demo-info h3 {
    color: #333;
    margin-bottom: 15px;
}

.demo-info ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.demo-info li {
    padding: 8px 0;
    border-bottom: 1px solid #e9ecef;
    position: relative;
    padding-left: 20px;
}

.demo-info li:last-child {
    border-bottom: none;
}

.demo-info li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
}

/* 主题控制 */
.theme-controls {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.theme-controls h3 {
    color: #333;
    margin-bottom: 15px;
}

.theme-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.theme-btn {
    padding: 8px 16px;
    border: 2px solid #dee2e6;
    border-radius: 6px;
    background: white;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
}

.theme-btn:hover {
    border-color: #007bff;
    background: #f8f9ff;
}

.theme-btn.active {
    border-color: #007bff;
    background: #007bff;
    color: white;
}

.color-controls {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.color-controls label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: #555;
}

.color-controls input[type="color"] {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.color-controls input[type="range"] {
    width: 120px;
}

/* 插件控制 */
.plugin-controls {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.plugin-controls h3 {
    color: #333;
    margin-bottom: 15px;
}

.plugin-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.plugin-buttons button {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    background: #6c757d;
    color: white;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.plugin-buttons button:hover {
    background: #5a6268;
}

.plugin-buttons button.active {
    background: #28a745;
}

.plugin-info {
    background: #e9ecef;
    padding: 15px;
    border-radius: 4px;
}

.plugin-info p {
    margin: 0;
    font-size: 14px;
    color: #495057;
}

.plugin-info span {
    font-weight: 600;
    color: #007bff;
}

/* 主题定制器 */
.theme-customizer {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.theme-customizer h3 {
    color: #333;
    margin-bottom: 15px;
}

.customizer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.customizer-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.customizer-group label {
    font-weight: 500;
    color: #555;
    font-size: 14px;
}

.customizer-group input[type="color"] {
    width: 100%;
    height: 40px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.customizer-group input[type="range"] {
    width: 100%;
    margin: 5px 0;
}

/* 高级控制 */
.advanced-controls {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.advanced-controls h3 {
    color: #333;
    margin-bottom: 15px;
}

.control-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.control-grid button {
    padding: 12px 20px;
    border: none;
    border-radius: 6px;
    background: #007bff;
    color: white;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.control-grid button:hover {
    background: #0056b3;
    transform: translateY(-2px);
}

.advanced-info {
    background: #e9ecef;
    padding: 15px;
    border-radius: 4px;
}

.advanced-info h4 {
    color: #333;
    margin-bottom: 10px;
    font-size: 16px;
}

.advanced-info ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 8px;
}

.advanced-info li {
    padding: 5px 0;
    font-size: 14px;
    color: #495057;
}

kbd {
    background: #495057;
    color: white;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 12px;
    margin-right: 5px;
}

/* 页脚 */
.demo-footer {
    background: rgba(0, 0, 0, 0.1);
    color: white;
    text-align: center;
    padding: 30px 20px;
    backdrop-filter: blur(10px);
}

.demo-footer p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.footer-links a:hover {
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .demo-header h1 {
        font-size: 2rem;
    }
    
    .demo-header p {
        font-size: 1rem;
    }
    
    .demo-main {
        padding: 20px 10px;
    }
    
    .demo-section {
        padding: 20px;
    }
    
    .demo-controls {
        flex-direction: column;
        gap: 10px;
    }
    
    .theme-buttons {
        justify-content: center;
    }
    
    .color-controls {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .customizer-grid {
        grid-template-columns: 1fr;
    }
    
    .control-grid {
        grid-template-columns: 1fr;
    }
    
    .advanced-info ul {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}

/* 加载动画 */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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