/* Universal CSS Framework */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* Theme Variables */
:root {
    /* Colors */
    --primary: #1B67FF;
    --primary-light: rgba(27, 103, 255, 0.1);
    --primary-dark: #0D47A1;
    
    --success: #00A65A;
    --success-light: rgba(0, 166, 90, 0.1);
    --success-dark: #008548;
    
    --danger: #DC3545;
    --danger-light: rgba(220, 53, 69, 0.1);
    --danger-dark: #BD2130;
    
    --warning: #FF8F4B;
    --warning-light: rgba(255, 143, 75, 0.1);
    --warning-dark: #E67E3A;
    
    /* Theme Colors */
    --background: #0a0a0a;
    --surface: #1a1a1a;
    --surface-hover: #2a2a2a;
    
    /* Typography */
    --text: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.6);
    --text-light: rgba(255, 255, 255, 0.87);
    
    /* Border */
    --border: rgba(255, 255, 255, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Typography Utilities */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-md { font-size: 1rem; }
.text-lg { font-size: 1.25rem; }
.text-xl { font-size: 1.5rem; }
.text-2xl { font-size: 2rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: var(--text-muted); }
.text-light { color: var(--text-light); }

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Spacing Utilities */
.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* Components */

/* Cards */
.card {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.card-hover:hover {
    transform: translateY(-2px);
    background-color: var(--surface-hover);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
}

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.btn-success {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.btn-danger {
    background: var(--danger);
    border-color: var(--danger);
    color: white;
}

.btn-warning {
    background: var(--warning);
    border-color: var(--warning);
    color: white;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background-color: var(--background);
    color: var(--text);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
}

/* Tables */
.table-container {
    overflow-x: auto;
    background-color: var(--surface);
    border-radius: var(--radius-lg);
}

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

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    font-weight: 600;
    color: var(--text-light);
}

.table tr:hover {
    background-color: var(--surface-hover);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-primary {
    background-color: var(--primary-light);
    color: var(--primary);
}

.badge-success {
    background-color: var(--success-light);
    color: var(--success);
}

.badge-danger {
    background-color: var(--danger-light);
    color: var(--danger);
}

.badge-warning {
    background-color: var(--warning-light);
    color: var(--warning);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    width: 100%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.nav-brand {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

.nav-link.active {
    background-color: var(--primary);
    color: white;
}

.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 1rem;
}

.card-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.card-stats {
    padding: 1rem;
    background-color: var(--surface-hover);
    border-radius: var(--radius-sm);
    margin: 1rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.stat-item:last-child {
    margin-bottom: 0;
    border-bottom: none;
}

.stat-label {
    color: var(--text-muted);
}

.stat-value {
    font-weight: 600;
    color: var(--text);
}

.user-ads {
    padding: 0 1rem 1rem;
}

.ad-item {
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    background-color: var(--surface);
    transition: var(--transition);
}

.ad-item:hover {
    background-color: var(--surface-hover);
}

.ad-header {
    margin-bottom: 0.75rem;
}

.ad-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.ad-link:hover {
    color: var(--text);
}

.ad-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.ad-metrics {
    display: flex;
    gap: 1rem;
}

.ad-metrics span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

/* Responsive Design */
@media screen and (max-width: 1024px) {
    .grid-cols-4 { grid-template-columns: repeat(3, 1fr); }
}

@media screen and (max-width: 768px) {
    .grid-cols-3, .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
    
    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
    }

    .header-nav {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }

    .nav-link {
        padding: 0.375rem 0.75rem;
    }
}

@media screen and (max-width: 480px) {
    .grid-cols-2, .grid-cols-3, .grid-cols-4 { grid-template-columns: 1fr; }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .table th,
    .table td {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }
}