:root {
    --primary-bg: #0a0e27;
    --secondary-bg: #151932;
    --card-bg: #1a1f3a;
    --accent-blue: #00d4ff;
    --accent-blue-dark: #0099cc;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --border-color: #2d3748;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Header */
.header {
    background: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-blue);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-container {
    flex: 1;
    max-width: 500px;
    margin: 0 2rem;
}

.search-box {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s;
}

.search-box:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.tab {
    padding: 0.75rem 1.5rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
    font-size: 0.95rem;
    font-weight: 500;
}

.tab:hover {
    background: var(--card-bg);
    color: var(--text-primary);
}

.tab.active {
    background: var(--accent-blue);
    color: var(--primary-bg);
    border-color: var(--accent-blue);
    font-weight: 600;
}

/* Grid */
.webtoon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1.5rem;
}

/* Card */
.webtoon-card {
    background: var(--secondary-bg);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.webtoon-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.2);
    border-color: var(--accent-blue);
}

.webtoon-thumbnail {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    background: var(--card-bg);
}

.webtoon-info {
    padding: 1rem;
}

.webtoon-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.webtoon-author {
    font-size: 0.85rem;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}

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

/* Detail Page */
.detail-header {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    background: var(--secondary-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.detail-thumbnail {
    width: 200px;
    min-width: 200px;
    aspect-ratio: 3/4;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.detail-info {
    flex: 1;
}

.detail-title {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.detail-author {
    color: var(--accent-blue);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.detail-genre {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--card-bg);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.detail-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.episode-count {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Episodes */
.episodes-section {
    margin-top: 2rem;
}

.episodes-header {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.episodes-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.episode-item {
    background: var(--secondary-bg);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.episode-item:hover {
    background: var(--card-bg);
    border-color: var(--accent-blue);
}

.episode-info {
    flex: 1;
    cursor: pointer;
    padding-right: 1rem;
}

.episode-info:hover .episode-title {
    color: var(--accent-blue);
}

.episode-title {
    font-weight: 500;
    color: var(--text-primary);
    transition: color 0.3s;
}

.episode-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.episode-arrow {
    color: var(--accent-blue);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: transform 0.3s;
}

.episode-arrow:hover {
    transform: translateX(4px);
}

/* Download Button */
.download-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--accent-blue);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    position: relative;
}

.download-btn:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: var(--primary-bg);
}

.download-btn:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.download-btn .download-icon {
    font-size: 1rem;
}

.download-btn .download-spinner {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid var(--accent-blue);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    position: absolute;
}

.download-btn.loading .download-icon {
    display: none;
}

.download-btn.loading .download-spinner {
    display: block;
}

.download-btn.loading {
    background: var(--secondary-bg);
}

.download-btn.success {
    background: #10b981;
    border-color: #10b981;
    color: white;
}

.download-btn.success .download-icon::after {
    content: '✓';
}

.download-btn.success .download-icon {
    font-size: 0;
}

.download-btn.success .download-icon::after {
    font-size: 1rem;
}

.download-btn.error {
    background: #ef4444;
    border-color: #ef4444;
    color: white;
}

/* Download Progress Bar */
.download-progress-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.5rem;
}

.download-progress-bar {
    width: 60px;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.download-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), #00ff88);
    border-radius: 3px;
    transition: width 0.2s ease;
}

.download-progress-text {
    font-size: 0.75rem;
    color: var(--accent-blue);
    min-width: 35px;
    text-align: right;
    font-weight: 600;
}

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

/* Pagination */
.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
    padding: 1rem;
    flex-wrap: wrap;
}

.pagination-btn {
    padding: 0.75rem 1rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    min-width: 44px;
}

.pagination-btn:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: var(--primary-bg);
}

.pagination-page {
    padding: 0.5rem 0.75rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    min-width: 40px;
}

.pagination-page:hover {
    background: var(--card-bg);
    border-color: var(--accent-blue);
}

.pagination-page.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: var(--primary-bg);
    font-weight: 700;
}

.pagination-dots {
    color: var(--text-secondary);
    padding: 0 0.5rem;
    user-select: none;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* Load More Button */
.load-more-btn {
    width: 100%;
    padding: 1rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--accent-blue);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 0.75rem;
}

.load-more-btn:hover {
    background: var(--card-bg);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

/* Reader */
.reader-container {
    background: var(--primary-bg);
    min-height: 100vh;
}

.reader-header {
    background: var(--secondary-bg);
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-button {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

.back-button:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: var(--primary-bg);
}

.reader-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.reader-images {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

.reader-image {
    width: 100%;
    display: block;
    margin-bottom: 0;
    background: var(--card-bg);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .search-container {
        margin: 0;
        width: 100%;
        max-width: none;
    }

    .webtoon-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 1rem;
    }

    .detail-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .detail-thumbnail {
        width: 160px;
        min-width: 160px;
    }

    .detail-title {
        font-size: 1.5rem;
    }

    .tabs {
        -webkit-overflow-scrolling: touch;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue);
}