/* ===== MODERN ADMIN THEME CSS ===== */
/* Central stylesheet for consistent design across all admin pages */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
    /* Color Schemes */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --warning-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --info-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    --danger-gradient: linear-gradient(135deg, #ff416c 0%, #ff4b2b 100%);
    
    /* Background Colors */
    --sidebar-bg: #1a1d29;
    --content-bg: #f8fafc;
    --card-bg: #ffffff;
    --nav-bg: var(--primary-gradient);
    
    /* Shadow System */
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --card-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Text Colors */
    --text-primary: #1a202c;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-light: #f9fafb;
    
    /* Border & Dividers */
    --border-light: #e5e7eb;
    --border-medium: #d1d5db;
    --border-dark: #9ca3af;
    
    /* Status Colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* Spacing System */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: all 0.15s ease;
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--content-bg);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== MODERN NAVIGATION ===== */
.modern-navbar {
    background: var(--nav-bg);
    padding: var(--spacing-md) 0;
    box-shadow: var(--card-shadow);
    position: sticky;
    top: 0;
    z-index: 1030;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    text-decoration: none;
    color: white !important;
}

.navbar-brand:hover {
    color: rgba(255, 255, 255, 0.9) !important;
    transform: translateY(-1px);
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    margin: 0 var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md) !important;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.navbar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white !important;
    transform: translateY(-1px);
}

.navbar-text {
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 500;
}

.navbar-toggler {
    border: none;
    padding: var(--spacing-xs);
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* ===== HEADER SECTIONS ===== */
.page-header {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-light);
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

.page-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ===== MODERN CARDS ===== */
.modern-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    border: none;
    box-shadow: var(--card-shadow);
    transition: var(--transition-normal);
    overflow: hidden;
    border: 1px solid var(--border-light);
}

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

.modern-card-header {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 2px solid var(--border-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.modern-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.modern-card-title i {
    color: #667eea;
}

.modern-card-body {
    padding: var(--spacing-lg);
}

.modern-card-footer {
    background: #f8fafc;
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-md) var(--spacing-lg);
}

/* ===== STATISTICS CARDS ===== */
.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: none;
    box-shadow: var(--card-shadow);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    height: 100%;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-gradient);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.stat-card .stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.stat-card .stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-card .stat-label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card .stat-trend {
    font-size: 0.85rem;
    margin-top: var(--spacing-sm);
}

/* Stat card variants */
.stat-card.primary { --stat-color: #667eea; }
.stat-card.success { --stat-color: #10b981; }
.stat-card.warning { --stat-color: #f59e0b; }
.stat-card.danger { --stat-color: #ef4444; }
.stat-card.info { --stat-color: #3b82f6; }

.stat-card .stat-icon {
    background: linear-gradient(135deg, var(--stat-color), rgba(var(--stat-color), 0.8));
    color: white;
}

/* ===== MODERN BUTTONS ===== */
.modern-btn {
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-lg);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    text-transform: none;
    letter-spacing: 0.025em;
    transition: var(--transition-normal);
    box-shadow: 0 2px 4px rgba(102, 126, 234, 0.2);
    color: white;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
}

.modern-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
    color: white;
    text-decoration: none;
}

.modern-btn:focus {
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.3);
}

.modern-btn:active {
    transform: translateY(0);
}

.modern-btn:disabled {
    opacity: 0.6;
    transform: none;
    cursor: not-allowed;
}

/* Button variants */
.modern-btn-success {
    background: var(--success-gradient);
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

.modern-btn-success:hover {
    box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
    color: white;
}

.modern-btn-warning {
    background: var(--warning-gradient);
    box-shadow: 0 2px 4px rgba(245, 158, 11, 0.2);
}

.modern-btn-warning:hover {
    box-shadow: 0 4px 8px rgba(245, 158, 11, 0.3);
    color: white;
}

.modern-btn-info {
    background: var(--info-gradient);
    box-shadow: 0 2px 4px rgba(79, 172, 254, 0.2);
}

.modern-btn-info:hover {
    box-shadow: 0 4px 8px rgba(79, 172, 254, 0.3);
    color: white;
}

.modern-btn-danger {
    background: var(--danger-gradient);
    box-shadow: 0 2px 4px rgba(239, 68, 68, 0.2);
}

.modern-btn-danger:hover {
    box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
    color: white;
}

.modern-btn-outline {
    background: transparent;
    border: 2px solid #667eea;
    color: #667eea;
    box-shadow: none;
}

.modern-btn-outline:hover {
    background: #667eea;
    color: white;
}

/* Button sizes */
.modern-btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.modern-btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* ===== MODERN FORMS ===== */
.modern-form-control {
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: var(--transition-normal);
    background: #f9fafb;
    color: var(--text-primary);
}

.modern-form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white;
    outline: none;
}

.modern-form-control:hover {
    border-color: var(--border-medium);
}

.modern-form-control.is-valid {
    border-color: var(--success-color);
}

.modern-form-control.is-invalid {
    border-color: var(--danger-color);
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.form-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

.modern-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* ===== MODERN TABLES ===== */
.modern-table {
    margin: 0;
    border-collapse: separate;
    border-spacing: 0;
}

.modern-table th {
    background: #f8fafc;
    border: none;
    font-weight: 600;
    color: var(--text-primary);
    padding: var(--spacing-md);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border-bottom: 2px solid var(--border-light);
}

.modern-table td {
    border: none;
    padding: var(--spacing-md);
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

.modern-table tbody tr {
    transition: var(--transition-fast);
}

.modern-table tbody tr:hover {
    background: #f8fafc;
}

.modern-table tbody tr:last-child td {
    border-bottom: none;
}

/* ===== MODERN ALERTS ===== */
.modern-alert {
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--card-shadow);
    border-left: 4px solid;
    font-size: 0.9rem;
}

.modern-alert.alert-success {
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
    border-left-color: var(--success-color);
    color: #065f46;
}

.modern-alert.alert-danger {
    background: linear-gradient(135deg, #fef2f2 0%, #fef7f7 100%);
    border-left-color: var(--danger-color);
    color: #991b1b;
}

.modern-alert.alert-warning {
    background: linear-gradient(135deg, #fffbeb 0%, #fefce8 100%);
    border-left-color: var(--warning-color);
    color: #92400e;
}

.modern-alert.alert-info {
    background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
    border-left-color: var(--info-color);
    color: #1e40af;
}

/* ===== PROGRESS BARS ===== */
.modern-progress {
    height: 8px;
    border-radius: var(--radius-sm);
    background: #f1f5f9;
    overflow: hidden;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.modern-progress-bar {
    height: 100%;
    border-radius: var(--radius-sm);
    transition: width 0.6s ease;
    background: var(--primary-gradient);
}

.modern-progress-bar.bg-success {
    background: var(--success-gradient);
}

.modern-progress-bar.bg-warning {
    background: var(--warning-gradient);
}

.modern-progress-bar.bg-danger {
    background: var(--danger-gradient);
}

.modern-progress-bar.bg-info {
    background: var(--info-gradient);
}

/* ===== BADGES ===== */
.modern-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.modern-badge.badge-success {
    background: var(--success-gradient);
    color: white;
}

.modern-badge.badge-warning {
    background: var(--warning-gradient);
    color: white;
}

.modern-badge.badge-danger {
    background: var(--danger-gradient);
    color: white;
}

.modern-badge.badge-info {
    background: var(--info-gradient);
    color: white;
}

.modern-badge.badge-light {
    background: #f8fafc;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

/* ===== DROPDOWNS ===== */
.modern-dropdown-menu {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow-lg);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.modern-dropdown-item {
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-fast);
    color: var(--text-primary);
    text-decoration: none;
}

.modern-dropdown-item:hover {
    background: #f1f5f9;
    color: var(--text-primary);
    text-decoration: none;
}

.modern-dropdown-item.active {
    background: var(--primary-gradient);
    color: white;
}

/* ===== MODALS ===== */
.modern-modal .modal-content {
    border: none;
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow-lg);
}

.modern-modal .modal-header {
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    border-bottom: none;
    padding: var(--spacing-lg);
}

.modern-modal .modal-title {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modern-modal .modal-body {
    padding: var(--spacing-lg);
}

.modern-modal .modal-footer {
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-lg);
    background: #f8fafc;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.modern-modal .btn-close {
    color: white;
    opacity: 0.8;
}

.modern-modal .btn-close:hover {
    opacity: 1;
}

/* ===== PAGINATION ===== */
.modern-pagination .page-link {
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    margin: 0 2px;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    text-decoration: none;
}

.modern-pagination .page-link:hover {
    background: #f1f5f9;
    border-color: #667eea;
    color: #667eea;
}

.modern-pagination .page-item.active .page-link {
    background: var(--primary-gradient);
    border-color: #667eea;
    color: white;
}

.modern-pagination .page-item.disabled .page-link {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== LOADING STATES ===== */
.loading-shimmer {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== UTILITY CLASSES ===== */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-sm { box-shadow: var(--card-shadow); }
.shadow-md { box-shadow: var(--card-shadow-hover); }
.shadow-lg { box-shadow: var(--card-shadow-lg); }

.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }

.transition-fast { transition: var(--transition-fast); }
.transition-normal { transition: var(--transition-normal); }
.transition-slow { transition: var(--transition-slow); }

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .page-header {
        padding: var(--spacing-lg);
    }

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

    .stat-card {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-md);
    }

    .modern-card-body {
        padding: var(--spacing-md);
    }

    .modern-btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.85rem;
    }

    .page-actions {
        justify-content: stretch;
    }

    .page-actions .modern-btn {
        flex: 1;
        min-width: 0;
    }
}

@media (max-width: 576px) {
    .page-header {
        padding: var(--spacing-md);
    }

    .page-title {
        font-size: 1.25rem;
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .modern-card-header,
    .modern-card-body {
        padding: var(--spacing-md);
    }

    .stat-card .stat-value {
        font-size: 2rem;
    }

    .navbar-nav {
        margin-top: var(--spacing-md);
    }

    .navbar-nav .nav-link {
        margin: var(--spacing-xs) 0;
    }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --content-bg: #0f172a;
        --card-bg: #1e293b;
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --border-light: #334155;
        --border-medium: #475569;
    }

    .modern-card-header {
        background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    }

    .modern-table th {
        background: #1e293b;
    }

    .modern-table tbody tr:hover {
        background: #334155;
    }

    .modern-form-control {
        background: #1e293b;
        border-color: #334155;
        color: var(--text-primary);
    }

    .modern-form-control:focus {
        background: #334155;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .print-hide {
        display: none !important;
    }

    .modern-card {
        box-shadow: none;
        border: 1px solid #e5e7eb;
    }

    .modern-btn {
        background: #f3f4f6 !important;
        color: #000 !important;
        box-shadow: none;
    }

    .page-header {
        box-shadow: none;
        border: 1px solid #e5e7eb;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus states for keyboard navigation */
.modern-btn:focus-visible,
.modern-form-control:focus-visible,
.nav-link:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .modern-card {
        border: 2px solid var(--text-primary);
    }

    .modern-btn {
        border: 2px solid currentColor;
    }
}