/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --accent-color: #4cc9f0;
    --success-color: #4ade80;
    --danger-color: #f43f5e;
    --warning-color: #f59e0b;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-color: #64748b;
    --border-radius: 12px;
    --box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 90%;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-content h2 {
    color: var(--danger-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.terms-text {
    background: #fff7ed;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--warning-color);
    margin: 1.5rem 0;
}

.terms-text ol {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.terms-text li {
    margin-bottom: 0.5rem;
}

.warning {
    background: #fef2f2;
    color: var(--danger-color);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

/* 头部 */
header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

header h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.subtitle {
    color: var(--gray-color);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.disclaimer {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    margin-top: 1rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

/* 按钮样式 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
}

.btn-secondary {
    background: var(--light-color);
    color: var(--dark-color);
    border: 2px solid #e2e8f0;
}

.btn-secondary:hover {
    background: #f1f5f9;
}

.btn-parse {
    background: linear-gradient(135deg, var(--success-color), #22c55e);
    color: white;
    font-size: 1rem;
    padding: 0.875rem 2rem;
}

.btn-download {
    background: linear-gradient(135deg, var(--accent-color), #3b82f6);
    color: white;
    font-size: 1.1rem;
    padding: 1rem 3rem;
    margin-top: 1.5rem;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(76, 201, 240, 0.4);
}

/* 输入区域 */
.input-section {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.input-with-icon {
    flex: 1;
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-color);
}

#url-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

#url-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.url-examples {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.example-title {
    color: var(--gray-color);
    font-weight: 500;
}

.example-btn {
    background: #f1f5f9;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.example-btn:hover {
    background: #e2e8f0;
}

/* 平台区域 */
.platforms-section {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.platforms-section h2 {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.platform-card {
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.platform-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.platform-card i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
    color: var(--gray-color);
}

/* 平台特定颜色 */
.platform-card[data-platform="bilibili"]:hover i { color: #fb7299; }
.platform-card[data-platform="douyin"]:hover i { color: #000000; }
.platform-card[data-platform="kuaishou"]:hover i { color: #ff5e00; }
.platform-card[data-platform="tiktok"]:hover i { color: #000000; }
.platform-card[data-platform="youku"]:hover i { color: #00a1d6; }

.platform-card span {
    font-weight: 500;
    color: var(--dark-color);
}

/* 结果区域 */
.results-section {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
    animation: slideIn 0.3s ease;
}

.results-section h2 {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

/* 媒体预览 */
.media-preview {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .media-preview {
        flex-direction: column;
    }
}

.thumbnail {
    flex: 1;
    max-width: 400px;
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    background: black;
    aspect-ratio: 16/9;
}

.thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 3rem;
    opacity: 0.8;
    transition: var(--transition);
}

.thumbnail:hover .play-overlay {
    opacity: 1;
    transform: scale(1.1);
}

.close-player {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-player:hover {
    background: rgba(255, 0, 0, 0.7);
}

.duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.media-info {
    flex: 1;
}

.media-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.meta-info {
    display: flex;
    gap: 1.5rem;
    color: var(--gray-color);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.meta-info span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.platform-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* 下载选项 */
.download-options {
    background: var(--light-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
}

.download-options h4 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.format-selector, .quality-selector {
    margin-bottom: 1.5rem;
}

.format-selector label, .quality-selector label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.format-buttons, .quality-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.format-btn, .quality-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #e2e8f0;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.format-btn:hover, .quality-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.format-btn.active, .quality-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.download-action {
    text-align: center;
}

.demo-notice {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--gray-color);
}

.debug-info {
    margin-top: 2rem;
    border-top: 1px solid #e2e8f0;
    padding-top: 1rem;
}

.debug-info h5 {
    color: var(--gray-color);
    margin-bottom: 0.5rem;
}

.debug-info pre {
    background: #1e293b;
    color: #4ade80;
    padding: 1rem;
    border-radius: 8px;
    font-family: 'Consolas', monospace;
    font-size: 0.85rem;
    overflow-x: auto;
    white-space: pre-wrap;
}

/* 使用说明 */
.instructions {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.instructions h2 {
    margin-bottom: 2rem;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.step {
    text-align: center;
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step h3 {
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.step p {
    color: var(--gray-color);
    font-size: 0.9rem;
}

/* 页脚 */
footer {
    margin-top: 3rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 3rem 2rem;
}

.footer-section h4 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-section p {
    color: var(--gray-color);
    font-size: 0.9rem;
}

.footer-bottom {
    background: #f8fafc;
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid #e2e8f0;
}

.footer-bottom p {
    color: var(--gray-color);
    font-size: 0.9rem;
}

.version {
    margin-top: 0.5rem;
    font-family: monospace;
    color: var(--primary-color) !important;
}

/* 通知 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 10px;
    transform: translateX(150%);
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    z-index: 2000;
    border-left: 5px solid var(--primary-color);
}

.notification.show {
    transform: translateX(0);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .btn-parse {
        width: 100%;
    }
}