/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #f8f9fa;
    --card-bg: #ffffff;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #10b981;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
}

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

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

/* Header */
.header {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
}

.logo span { color: var(--primary); }

.nav { display: flex; gap: 1.5rem; align-items: center; }
.nav a {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}
.nav a:hover { color: var(--primary); }

/* Hero */
.hero {
    text-align: center;
    padding: 3rem 2rem 2rem;
    max-width: 700px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Filters */
.filters {
    max-width: 1200px;
    margin: 0 auto 2rem;
    padding: 0 2rem;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 100px;
    background: #fff;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.filter-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-right: 0.25rem;
    align-self: center;
}

.filter-separator {
    width: 1px;
    height: 24px;
    background: var(--border);
    align-self: center;
    margin: 0 0.5rem;
}

/* Search */
.search-bar {
    max-width: 1200px;
    margin: 0 auto 1.5rem;
    padding: 0 2rem;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.95rem;
    background: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Grid */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem 3rem;
}

.offers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.25rem;
}

/* Offer Card */
.offer-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow 0.2s, transform 0.2s;
}

.offer-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.offer-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: #f1f5f9;
}

.offer-body { padding: 1.25rem; }

.offer-network {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.offer-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.offer-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.offer-meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-type {
    background: #eff6ff;
    color: #2563eb;
}

.badge-vertical {
    background: #f0fdf4;
    color: #16a34a;
}

.badge-payout {
    background: #fefce8;
    color: #ca8a04;
}

.offer-cta {
    display: inline-block;
    padding: 0.6rem 1.25rem;
    background: var(--primary);
    color: #fff;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: background 0.2s;
    width: 100%;
    text-align: center;
}

.offer-cta:hover {
    background: var(--primary-hover);
    color: #fff;
}

/* Network Page */
.network-header {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.network-header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.network-header p {
    color: var(--text-muted);
}

.network-header .network-link {
    display: inline-block;
    margin-top: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: #fff;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.network-header .network-link:hover {
    background: var(--primary-hover);
    color: #fff;
}

/* Stats */
.stats {
    display: flex;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto 2rem;
    padding: 0 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* Admin */
.admin-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.admin-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.admin-card h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.btn {
    padding: 0.65rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover { background: var(--primary-hover); }

.btn-danger {
    background: #ef4444;
    color: #fff;
}

.btn-danger:hover { background: #dc2626; }

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-success { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }

/* Table */
.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Login */
.login-wrap {
    max-width: 400px;
    margin: 4rem auto;
    padding: 0 2rem;
}

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

.empty-state h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.6rem; }
    .offers-grid { grid-template-columns: 1fr; }
    .stats { gap: 1rem; }
    .stat-number { font-size: 1.5rem; }
    .header { padding: 0 1rem; }
    .container, .filters, .search-bar { padding-left: 1rem; padding-right: 1rem; }
}