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

:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --secondary: #10B981;
    --bg-dark: #0F172A;
    --bg-card: #1E293B;
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --border: #334155;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--primary);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Hero */
.hero {
    text-align: center;
    padding: 3rem 0;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    cursor: pointer;
    transition: all 0.2s;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.feature-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary);
    font-weight: 500;
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* Pagination Info */
.pagination-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Ads Grid */
.ads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.ad-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: border-color 0.2s;
}

.ad-card:hover {
    border-color: var(--primary);
}

.ad-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.ad-cover {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--bg-dark);
}

.ad-content {
    padding: 1rem;
}

.ad-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ad-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 1rem;
}

.ad-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
}

.meta-item {
    background: var(--bg-dark);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    color: var(--text-secondary);
}

.meta-item strong {
    color: var(--text-primary);
}

.ad-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.stat-icon {
    font-size: 0.9rem;
}

/* Ad Header Row with Status */
.ad-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.ad-header-row .ad-title {
    flex: 1;
    margin-bottom: 0;
}

.ad-status {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
    margin-left: 0.5rem;
}

.status-active {
    background: #10B981;
    color: white;
}

.status-inactive {
    background: #6B7280;
    color: white;
}

/* Score Row */
.ad-score-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.score-badge {
    background: linear-gradient(135deg, #667EEA 0%, #764BA2 100%);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.85rem;
}

.score-badge strong {
    font-weight: 600;
}

.score-detail {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-dark);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
}

/* Recommendation Reason */
.ad-reason {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--bg-dark);
    padding: 0.5rem;
    border-radius: 6px;
    margin-bottom: 0.75rem;
    border-left: 3px solid var(--primary);
}

.ad-reason strong {
    color: var(--text-primary);
}

/* Lifecycle Info */
.ad-lifecycle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    flex-wrap: wrap;
}

.lifecycle-tag {
    background: #F59E0B;
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
}

.lifecycle-tag.tag-potential {
    background: #10B981;
}

.lifecycle-views {
    color: var(--text-secondary);
}

.maturity-ratio {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

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

.error {
    color: #EF4444;
}

.empty {
    background: var(--bg-card);
    border-radius: 12px;
}

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

.btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn:hover:not(:disabled) {
    border-color: var(--primary);
}

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

.page-numbers {
    display: flex;
    gap: 0.25rem;
}

.page-num {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.page-num:hover {
    border-color: var(--primary);
}

.page-num.active {
    background: var(--primary);
    border-color: var(--primary);
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
    .stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

    .nav-menu {
        gap: 1rem;
    }
}