:root {
    --primary: #4F46E5;
    --primary-light: #818CF8;
    --accent: #10B981;
    --bg: #1E1B4B;
    --text: #E0E7FF;
    --text-secondary: #A5B4FC;
}

body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg), #2D3748);
    color: var(--text);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* 頂部導航 */
.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-light);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-controls {
    display: flex;
    gap: 1rem;
}

/* 搜索欄 */
.search-bar {
    display: flex;
    gap: 1rem;
    flex: 1;
    max-width: 500px;
    margin: 0 2rem;
}

.search-input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid var(--primary-light);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text);
}

.search-btn {
    padding: 0.8rem 1.5rem;
    background: var(--primary-light);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
}

/* 分類選單 */
.category-menu {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    overflow-x: auto;
    padding: 0.5rem 0;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.category-btn {
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--primary-light);
    border-radius: 20px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    -webkit-tap-highlight-color: transparent;
}

.category-btn.active {
    background: var(--primary-light);
    box-shadow: 0 0 10px rgba(129, 140, 248, 0.3);
}

/* 影片網格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.video-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    filter: blur(10px);
    position: relative;
    border: 2px solid transparent;
    transition: transform 0.3s ease, 
                background-color 0.3s ease, 
                border-color 0.3s ease, 
                box-shadow 0.3s ease;
}

.video-card.animate {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
    transition: opacity 0.6s ease,
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                filter 0.6s ease;
}

/* 滑鼠懸停效果 */
.video-card:hover {
    transform: translateY(-6px);
    background: rgba(79, 70, 229, 0.2);
    border-color: var(--primary-light);
    box-shadow: 
        0 12px 24px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(129, 140, 248, 0.2);
}

.video-card::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(129, 140, 248, 0.2) 0%, transparent 70%);
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: transform 0.4s ease-out, opacity 0.3s ease-out;
    pointer-events: none;
}

.video-card:hover::before {
    transform: translate(-50%, -50%) scale(1.5);
    opacity: 1;
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.video-card:hover .video-info {
    background: rgba(79, 70, 229, 0.1);
}

.video-card:hover .video-title {
    color: var(--primary-light);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 比例 */
    background: #000;
    overflow: hidden;
    border-radius: 12px;
}

.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.06);
    filter: brightness(1.1);
}

.video-thumbnail::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        transparent 60%,
        rgba(0, 0, 0, 0.5)
    );
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-card:hover .video-thumbnail::after {
    opacity: 1;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    z-index: 1;
}

/* 卡片信息區域效果 */
.video-info {
    padding: 1rem;
    transition: background-color 0.3s ease;
}

.video-card:hover .video-info {
    background: rgba(79, 70, 229, 0.15);
}

/* 標題效果 */
.video-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.video-card:hover .video-title {
    color: var(--primary-light);
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 按鈕樣式 */
.back-btn {
    padding: 0.8rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-5px);
}

.back-btn i {
    font-size: 1.1rem;
}

/* 動畫延遲（每行4個卡片） */
.video-card.animate:nth-child(4n+1) { transition-delay: 0.1s; }
.video-card.animate:nth-child(4n+2) { transition-delay: 0.2s; }
.video-card.animate:nth-child(4n+3) { transition-delay: 0.3s; }
.video-card.animate:nth-child(4n+4) { transition-delay: 0.4s; }

/* 響應式設計 */
@media (max-width: 768px) {
    .nav-bar {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 1rem;
        flex-wrap: wrap;
    }

    .nav-brand {
        order: 1;
        font-size: 1.2rem;
    }

    .nav-controls {
        order: 2;
        width: auto;
    }

    .search-bar {
        order: 3;
        width: 100%;
        margin: 1rem 0;
        max-width: none;
        flex-basis: 100%;
    }

    .back-btn {
        width: auto;
        padding: 0.6rem 1rem;
    }

    .category-menu {
        padding: 0.8rem 0;
        position: relative;
        z-index: 1;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        margin: 0 -20px 2rem -20px;
        padding: 0.8rem 20px;
    }

    .category-btn {
        padding: 0.6rem 1.8rem;
        min-height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }
}

@media (max-width: 319px) {
    .container {
        padding: 10px;
    }

    .video-grid {
        grid-template-columns: 1fr;
    }

    .nav-controls {
        width: 100%;
    }

    .back-btn {
        width: 100%;
        justify-content: center;
    }
}

/* 隱藏 Webkit 瀏覽器的滾動條 */
.category-menu::-webkit-scrollbar {
    display: none;
}

/* 分頁容器樣式 */
.pagination-container {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.pagination-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 頁碼按鈕樣式 */
.page-numbers {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-number {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.page-number.active {
    background: #2196F3;
    color: white;
    border-color: #2196F3;
}

.page-number:hover:not(.active) {
    background: rgba(255, 255, 255, 0.1);
}

/* 上一頁/下一頁按鈕 */
.page-btn {
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.page-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 分頁信息 */
.page-info {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.separator {
    color: rgba(255, 255, 255, 0.2);
}

.page-dots {
    color: rgba(255, 255, 255, 0.5);
    padding: 0 0.3rem;
}

/* 響應式調整 */
@media (max-width: 768px) {
    .pagination-container {
        padding: 1rem;
    }

    .page-numbers {
        gap: 0.3rem;
    }

    .page-number {
        width: 35px;
        height: 35px;
        font-size: 0.8rem;
    }

    .page-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .page-info {
        flex-wrap: wrap;
        justify-content: center;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .page-numbers button:not(.active):not(:first-child):not(:last-child) {
        display: none;
    }

    .page-info .separator,
    .page-info span:not(:last-child) {
        display: none;
    }
}

/* 類別選擇器樣式 */
.category-filter {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.category-btn {
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-btn i {
    font-size: 1.1rem;
}

.category-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.category-btn.active {
    background: #2196F3;
    color: white;
    border-color: #2196F3;
}

/* 響應式調整 */
@media (max-width: 768px) {
    .category-filter {
        justify-content: center;
    }
    
    .category-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}

/* 加載動畫樣式 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    color: #2196F3;
    font-size: 2.5rem;
    animation: spin 1s linear infinite;
}

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

/* 系列作品卡片特殊樣式 */
.series-card {
    position: relative;
    border: 2px solid #9C27B0;
}

.series-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(156, 39, 176, 0.9);
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 5px;
    backdrop-filter: blur(4px);
    z-index: 2;
}

.series-card:hover {
    border-color: #E040FB;
    box-shadow: 
        0 12px 24px rgba(156, 39, 176, 0.2),
        0 0 0 1px rgba(156, 39, 176, 0.2);
}

.series-card::before {
    background: radial-gradient(circle, rgba(156, 39, 176, 0.2) 0%, transparent 70%);
}