/* ========================================
   视频播放器模块样式
   ======================================== */

/* 视频中心页面 - 列表布局 */
.video-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: rgba(255, 255, 255, 0.6);
}

.empty-icon {
    font-size: 80px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-text {
    font-size: 24px;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.8);
}

.empty-hint {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.4);
}

/* 视频网格布局 - 2列，限制宽度不超出屏幕 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(300px, 500px));
    gap: 24px;
    padding: 30px;
    justify-content: center;
    margin: 0 auto;
    max-width: 1200px;
}

/* 视频卡片 */
.video-card {
    background: rgba(30, 33, 57, 0.6);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.3);
    border-color: rgba(139, 92, 246, 0.5);
}

/* 视频缩略图 */
.video-thumbnail {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, rgba(20, 20, 30, 0.8), rgba(30, 30, 45, 0.8));
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    height: auto;
    max-height: 280px;
}

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

.video-thumbnail-placeholder {
    font-size: 80px;
    opacity: 0.5;
    color: rgba(139, 92, 246, 0.8);
}

/* 视频时长标签 */
.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.85);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    color: white;
}

/* 管理员删除按钮 */
.video-delete-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(255, 71, 87, 0.9);
    color: white;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    z-index: 10;
}

.video-card:hover .video-delete-btn.admin-only {
    display: flex;
}

.video-delete-btn:hover {
    background: rgba(255, 71, 87, 1);
    transform: scale(1.1);
}

/* 视频信息区域 */
.video-info {
    padding: 14px;
}

.video-card-title {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.4;
    min-height: 42px;
    color: rgba(255, 255, 255, 0.95);
}

.video-meta {
    display: flex;
    gap: 12px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.video-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ========================================
   视频播放页面样式
   ======================================== */

.btn-back {
    background: rgba(30, 33, 57, 0.8);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-back:hover {
    background: rgba(40, 43, 67, 0.9);
    border-color: rgba(139, 92, 246, 0.5);
    transform: translateX(-2px);
}

.video-title-header {
    flex: 1;
    text-align: center;
    font-size: 22px;
    margin: 0 20px;
}

.video-player-actions {
    display: flex;
    gap: 8px;
}

.btn-icon {
    background: rgba(30, 33, 57, 0.8);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: rgba(40, 43, 67, 0.9);
    border-color: rgba(139, 92, 246, 0.5);
}

.btn-icon.btn-danger:hover {
    background: rgba(255, 71, 87, 0.2);
    border-color: rgba(255, 71, 87, 0.5);
}

/* 视频播放器主内容区 */
.video-player-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    overflow-y: auto;
    height: auto;
}

/* 视频播放器容器 */
.video-player-container {
    background: black;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.video-player {
    width: 100%;
    max-height: 60vh;
    height: auto;
    display: block;
    background: black;
}

/* 播放控制栏 */
.video-controls {
    background: rgba(30, 33, 57, 0.6);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.control-group label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    min-width: 80px;
}

.btn-speed,
.btn-control {
    background: rgba(60, 63, 87, 0.6);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-speed:hover,
.btn-control:hover {
    background: rgba(70, 73, 97, 0.8);
    border-color: rgba(139, 92, 246, 0.5);
}

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

/* 视频信息区域 */
.video-info-section {
    background: rgba(30, 33, 57, 0.6);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.video-meta-info {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.meta-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.meta-value {
    font-size: 16px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.95);
}

.video-description h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: rgba(255, 255, 255, 0.9);
}

.video-description p {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   上传视频对话框（将在JS中动态创建）
   ======================================== */
.upload-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.upload-modal-content {
    background: linear-gradient(135deg, #1e2139 0%, #2a2d47 100%);
    border-radius: 16px;
    padding: 32px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.upload-modal-header {
    font-size: 20px;
    margin-bottom: 24px;
    color: white;
}

.upload-form-group {
    margin-bottom: 20px;
}

.upload-form-group label {
    display: block;
    font-size: 14px;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.8);
}

.upload-form-group input[type="text"],
.upload-form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: rgba(20, 20, 30, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: white;
    font-size: 14px;
    font-family: inherit;
}

.upload-form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.upload-file-input {
    display: none;
}

.upload-file-label {
    display: block;
    padding: 40px 20px;
    background: rgba(20, 20, 30, 0.6);
    border: 2px dashed rgba(139, 92, 246, 0.4);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.upload-file-label:hover {
    border-color: rgba(139, 92, 246, 0.8);
    background: rgba(30, 30, 40, 0.8);
}

.upload-file-icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.6;
}

.upload-file-text {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.upload-file-hint {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
    margin-top: 8px;
}

.upload-file-selected {
    margin-top: 12px;
    padding: 12px;
    background: rgba(102, 126, 234, 0.2);
    border-radius: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
}

.upload-progress {
    margin-top: 16px;
    display: none;
}

.upload-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(20, 20, 30, 0.6);
    border-radius: 4px;
    overflow: hidden;
}

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

.upload-progress-text {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 8px;
    text-align: center;
}

.upload-modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.upload-modal-actions button {
    flex: 1;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
}

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

.btn-upload-confirm:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-upload-confirm:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-upload-cancel {
    background: rgba(60, 63, 87, 0.6);
    color: white;
}

.btn-upload-cancel:hover {
    background: rgba(70, 73, 97, 0.8);
}

/* ========================================
   响应式设计
   ======================================== */

/* 回到顶部按钮 - 矩形半透明样式 */
.back-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 12px 24px;
    background: rgba(139, 92, 246, 0.85);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
}

.back-to-top-btn:hover {
    background: rgba(139, 92, 246, 0.95);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.back-to-top-btn:active {
    transform: translateY(-1px);
}

.back-to-top-text {
    font-size: 14px;
    font-weight: 500;
    color: white;
    white-space: nowrap;
    letter-spacing: 0.5px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .back-to-top-btn {
        padding: 10px 20px;
        bottom: 20px;
        right: 20px;
    }

    .back-to-top-text {
        font-size: 13px;
    }
}

@media (max-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        padding: 20px;
    }
    
    .video-meta-info {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .video-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 16px;
    }
    
    .video-title-header {
        font-size: 18px;
        margin: 10px;
    }
    
    .video-meta-info {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .control-group {
        flex-wrap: wrap;
    }
    
    .video-player-main {
        padding: 16px;
    }
}