* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.header h1 {
    color: #333;
    font-size: 1.8em;
}

.header-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-upload,
.btn-delete-all,
.btn-logout {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-upload {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-upload:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-delete-all {
    background: #e67e22;
    color: white;
}

.btn-delete-all:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(230, 126, 34, 0.4);
}

.btn-logout {
    background: #e74c3c;
    color: white;
}

.btn-logout:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(231, 76, 60, 0.4);
}

/* 照片网格 */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

/* 照片卡片 */
.photo-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.photo-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.photo-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    cursor: pointer;
    transition: opacity 0.3s;
    opacity: 0; /* 初始隐藏，加载后显示 */
}

.photo-card img.loaded {
    opacity: 1;
}

.photo-card img:hover {
    opacity: 0.9;
}

/* 视频样式 */
.video-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: bold;
}

.photo-card video:hover {
    opacity: 0.95;
}

.photo-info {
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.photo-date {
    color: #666;
    font-size: 14px;
}

.btn-delete {
    padding: 8px 16px;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 12px;
    transition: background 0.3s;
}

.btn-delete:hover {
    background: #c0392b;
}

/* 上传进度条 */
.upload-progress {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    min-width: 400px;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #ecf0f1;
    border-radius: 10px;
    overflow: hidden;
    margin: 20px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    transition: width 0.3s;
    width: 0%;
}

.upload-progress p {
    text-align: center;
    color: #666;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: white;
}

.empty-icon {
    font-size: 80px;
    margin-bottom: 20px;
}

.empty-state h2 {
    font-size: 2em;
    margin-bottom: 10px;
}

.empty-state p {
    font-size: 1.1em;
    opacity: 0.9;
}

.tip {
    margin-top: 20px;
    font-style: italic;
}

/* 加载更多按钮 */
.load-more-container {
    text-align: center;
    padding: 40px 20px;
}

.btn-load-more {
    padding: 15px 40px;
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s;
}

.btn-load-more:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(102, 126, 234, 0.3);
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

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

/* 图片查看器 */
.image-viewer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    cursor: pointer;
}

.image-viewer img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 10px;
    opacity: 1 !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }

    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
        padding: 15px;
    }

    .photo-card img {
        height: 200px;
    }

    .upload-progress {
        min-width: 300px;
        padding: 30px;
    }
}