/* ===== BROWSE PAGE ===== */
.browse-hero {
    position: relative;
    padding: 20px 40px;
    border-radius: 24px;
    margin: 0 0 20px;
    overflow: hidden;
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 40%, #EC4899 100%);
}

.browse-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.3;
}

.browse-hero-bg::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 60%);
    border-radius: 50%;
}

.browse-hero-bg::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -15%;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 60%);
    border-radius: 50%;
}

.browse-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
}

.browse-hero-content h1 {
    font-size: 26px;
    font-weight: 900;
    margin: 0 0 6px;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.browse-hero-content p {
    font-size: 14px;
    color: rgba(255,255,255,0.8);
    margin: 0 0 16px;
}

.browse-hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.browse-stat {
    text-align: center;
}

.browse-stat-num {
    display: block;
    font-size: 24px;
    font-weight: 900;
    color: #fff;
}

.browse-stat-label {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-top: 4px;
}

.browse-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.browse-section-card {
    background: #fff;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid rgba(226,232,240,0.5);
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

[data-theme="dark"] .browse-section-card {
    background: var(--bg-card);
    border-color: var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.browse-section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 28px;
}

.browse-section-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(99,102,241,0.2);
}

.browse-section-info h3 {
    font-size: 20px;
    font-weight: 800;
    color: #1E293B;
    margin: 0 0 4px;
}

.browse-section-info p {
    font-size: 14px;
    color: #64748B;
    margin: 0;
}

.browse-section-link {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    padding: 10px 16px;
    border-radius: 12px;
    background: rgba(255,255,255,0.6);
    transition: all 0.3s;
}

.browse-section-link:hover {
    background: rgba(255,255,255,0.9);
    transform: translateX(4px);
}

.browse-section-categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    padding: 20px 28px 28px;
}

.browse-category-card {
    background: #FAFBFC;
    border-radius: 16px;
    border: 1px solid transparent;
    padding: 20px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.browse-category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(99,102,241,0.08);
    background: #fff;
}

.browse-category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.browse-category-name {
    font-size: 15px;
    font-weight: 700;
    color: #1E293B;
}

.browse-category-count {
    font-size: 12px;
    font-weight: 600;
    color: #94A3B8;
    background: #F1F5F9;
    padding: 4px 10px;
    border-radius: 12px;
}

.browse-category-resources {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.browse-resource-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.2s;
    color: #475569;
}

.browse-resource-item:hover {
    background: rgba(99,102,241,0.06);
    color: #1E293B;
}

.browse-resource-name {
    font-size: 14px;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.browse-proxy-tag {
    font-size: 10px;
    font-weight: 600;
    color: #EF4444;
    background: rgba(239,68,68,0.08);
    padding: 2px 8px;
    border-radius: 8px;
    flex-shrink: 0;
}

.browse-more-resources {
    font-size: 13px;
    color: #6366F1;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.browse-more-resources:hover {
    background: rgba(99,102,241,0.08);
}

@media (max-width: 768px) {
    .browse-hero {
        padding: 12px 20px;
        border-radius: 16px;
        margin-bottom: 12px;
    }
    
    .browse-hero-content h1 {
        font-size: 20px;
    }
    
    .browse-hero-content p {
        font-size: 12px;
    }
    
    .browse-hero-stats {
        gap: 20px;
    }
    
    .browse-stat-num {
        font-size: 20px;
    }
    
    .browse-section-header {
        padding: 16px;
    }
    
    .browse-section-icon {
        width: 48px;
        height: 48px;
    }
    
    .browse-section-categories {
        grid-template-columns: 1fr;
        padding: 16px 20px;
    }
}

@media (max-width: 1024px) {
    .about-features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .about-title { font-size: 40px; }
    .about-features-grid { grid-template-columns: 1fr; }
    .about-stats { flex-wrap: wrap; gap: 24px; }
    .about-stat-item { padding: 0 24px; }
    .about-stat-divider { display: none; }
    .tree-container { padding: 20px; }
}

.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.8);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 200;
    will-change: opacity, transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 28px rgba(99, 102, 241, 0.5);
}

.back-to-top:active {
    transform: translateY(-2px) scale(0.95);
}


/* ===== NEW BROWSE PAGE STYLES ===== */
.browse-container {
    display: flex;
    gap: 32px;
    margin-bottom: 48px;
}

.browse-sidebar {
    width: 260px;
    flex-shrink: 0;
    position: sticky;
    top: 80px;
    height: fit-content;
}

.sidebar-header {
    padding: 16px 20px;
    margin-bottom: 8px;
}

.sidebar-header h3 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-sections {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: var(--bg-card);
    border-radius: 16px;
    padding: 8px;
    border: 1px solid var(--border-color);
}

.section-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: none;
    background: transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    text-align: left;
}

.section-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.section-btn.active {
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    color: #fff;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.section-count {
    margin-left: auto;
    font-size: 12px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(100, 116, 139, 0.15);
}

.section-btn.active .section-count {
    background: rgba(255, 255, 255, 0.2);
}

.sidebar-subcats {
    margin-top: 16px;
    background: var(--bg-card);
    border-radius: 16px;
    padding: 8px 10px 8px 8px;
    border: 1px solid var(--border-color);
    max-height: calc(100vh - 480px);
    min-height: 120px;
    overflow-x: hidden;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: color-mix(in srgb, var(--border-color) 70%, transparent) transparent;
}
.sidebar-subcats::-webkit-scrollbar {
    width: 6px;
}
.sidebar-subcats::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 999px;
}
.sidebar-subcats::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--border-color) 70%, transparent);
    border-radius: 999px;
    transition: background 0.2s ease;
}
.sidebar-subcats::-webkit-scrollbar-thumb:hover {
    background: color-mix(in srgb, var(--accent-cyan, #22D3EE) 60%, var(--accent-violet, #8B5CF6) 40%);
}

.subcat-header {
    padding: 8px 16px;
    margin-bottom: 4px;
}

.subcat-header span {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.subcat-btn {
    display: block;
    width: 100%;
    padding: 10px 16px;
    border: none;
    background: transparent;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
    font-size: 13px;
    text-align: left;
}

.subcat-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.subcat-btn.active {
    background: rgba(99, 102, 241, 0.1);
    color: #6366F1;
    font-weight: 600;
}

.browse-content {
    flex: 1;
    min-width: 0;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.content-title h2 {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 4px;
}

.content-title p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.content-filter {
    display: flex;
    gap: 12px;
    align-items: center;
}

.content-filter input {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    font-size: 14px;
    color: var(--text-primary);
    width: 200px;
    transition: all 0.2s;
}

.content-filter input:focus {
    outline: none;
    border-color: #6366F1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.content-filter select {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
}

.content-filter select:focus {
    outline: none;
    border-color: #6366F1;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.resource-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--border-color);
    cursor: default;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                border-color var(--theme-duration) var(--theme-easing), background var(--theme-duration) var(--theme-easing),
                color var(--theme-duration) var(--theme-easing);
    opacity: 0;
    animation: fadeInUp 0.4s ease-out forwards;
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: relative;
    overflow: hidden;
}

.resource-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    border-color: rgba(99, 102, 241, 0.3);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    flex-shrink: 0;
}

.resource-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.resource-card p {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0 0 14px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-category {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-tertiary);
    padding: 4px 10px;
    background: var(--bg-hover);
    border-radius: 8px;
}

.card-fav {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    transition: all 0.2s;
}

.card-fav:hover {
    background: var(--bg-hover);
    color: #F59E0B;
}

.card-fav.favorited {
    color: #F59E0B;
}

.load-more {
    display: flex;
    justify-content: center;
    margin-top: 32px;
}

.load-more button {
    padding: 14px 32px;
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.load-more button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.4);
}

.resource-preview-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.resource-preview-modal.open {
    opacity: 1;
    visibility: visible;
}

.resource-preview-modal.open .preview-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.preview-content {
    position: relative;
    width: 90%;
    max-width: 500px;
    background: var(--bg-card);
    border-radius: 24px;
    padding: 32px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    transform: scale(0.9) translateY(20px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.preview-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-hover);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.preview-close:hover {
    background: var(--bg-active);
    color: var(--text-primary);
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.preview-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.preview-info {
    flex: 1;
}

.preview-info h3 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 4px;
}

.preview-category {
    font-size: 13px;
    font-weight: 500;
    color: #6366F1;
    padding: 3px 10px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
}

.preview-fav {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-hover);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.preview-fav:hover {
    color: #F59E0B;
}

.preview-fav.favorited {
    background: rgba(245, 158, 11, 0.1);
    color: #F59E0B;
}

.preview-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 20px;
}

.preview-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.preview-tags span {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-tertiary);
    padding: 5px 12px;
    background: var(--bg-hover);
    border-radius: 20px;
}

.preview-actions {
    display: flex;
    gap: 12px;
}

.preview-link {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.preview-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.4);
}

.preview-copy {
    padding: 14px 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-copy:hover {
    border-color: #6366F1;
    background: rgba(99, 102, 241, 0.05);
}

@media (max-width: 1024px) {
    .browse-container {
        flex-direction: column;
    }

    .browse-sidebar {
        width: 100%;
        position: static;
        margin-bottom: 16px;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .sidebar-sections {
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: flex-start;
        overflow-x: auto;
        max-height: 60px;
        padding-bottom: 4px;
    }

    .section-btn {
        flex: 0 0 auto;
        padding: 10px 14px;
        font-size: 13px;
    }

    .sidebar-subcats {
        display: flex;
        flex-wrap: nowrap;
        gap: 4px;
        max-height: 50px;
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .subcat-header {
        display: none;
    }

    .subcat-btn {
        flex: 0 0 auto;
        padding: 8px 12px;
        font-size: 12px;
        border-radius: 8px;
    }
}

@media (max-width: 768px) {
    .content-header {
        flex-direction: column;
    }

    .content-filter {
        width: 100%;
    }

    .content-filter input {
        flex: 1;
        min-width: 0;
    }

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

    .preview-content {
        width: 95%;
        padding: 24px;
    }

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

    .preview-actions {
        flex-direction: column;
    }
}