/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* 用户信息区域 */
.user-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-top: 15px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 25px;
    backdrop-filter: blur(10px);
}

.welcome-text {
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 6px 15px;
    border-radius: 15px;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
}

/* 导航按钮 */
.nav-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.nav-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 0.9rem;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* 主内容区域 */
.main {
    flex: 1;
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

/* 上传区域 */
.upload-section {
    margin-bottom: 40px;
}

.upload-area {
    border: 3px dashed #ddd;
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    background: #fafafa;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    border-color: #667eea;
    background: #f0f4ff;
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: #667eea;
    background: #e8f2ff;
    transform: scale(1.02);
}

.upload-content {
    pointer-events: none;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.6;
}

.upload-text {
    font-size: 1.3rem;
    font-weight: 600;
    color: #555;
    margin-bottom: 10px;
}

.upload-hint {
    color: #888;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.select-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    pointer-events: auto;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.select-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

/* 进度条 */
.progress-container {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-text {
    font-weight: 600;
    color: #667eea;
    min-width: 40px;
}

/* 结果展示区域 */
.results-section {
    border-top: 2px solid #f0f0f0;
    padding-top: 30px;
}

.results-section h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.result-item {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
}

.result-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.result-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.result-thumbnail {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
    border: 2px solid #e9ecef;
}

.result-info {
    flex: 1;
}

.result-filename {
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
    word-break: break-all;
}

.result-details {
    color: #666;
    font-size: 0.9rem;
}

.result-url {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.url-input {
    flex: 1;
    border: none;
    background: none;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: #555;
    outline: none;
}

.copy-btn {
    background: #28a745;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.copy-btn:hover {
    background: #218838;
    transform: translateY(-1px);
}

.copy-btn.copied {
    background: #17a2b8;
}

/* 底部样式 */
.footer {
    text-align: center;
    color: white;
    opacity: 0.8;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .main {
        padding: 25px;
        border-radius: 15px;
    }
    
    .upload-area {
        padding: 40px 15px;
    }
    
    .upload-text {
        font-size: 1.1rem;
    }
    
    .result-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .result-thumbnail {
        width: 50px;
        height: 50px;
    }
    
    .progress-container {
        flex-direction: column;
        gap: 10px;
    }
    
    .progress-text {
        align-self: flex-end;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-item {
    animation: fadeIn 0.5s ease;
}

/* 成功/错误提示 */
.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}