:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --border-radius: 16px;
    --sidebar-width: 260px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dark-color);
    background: #f1f5f9;
    line-height: 1.6;
}

.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero-section .navbar {
    background: white !important;
}

.min-vh-75 {
    min-height: 75vh;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    border-radius: 8px;
    padding: 10px 24px;
    font-weight: 500;
}

.btn-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
}

.card {
    border-radius: var(--border-radius);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1) !important;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
}

.feature-box {
    font-size: 48px;
}

.shadow-sm {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08) !important;
}

/* Dashboard Styles */
.stat-card {
    border-left: 4px solid var(--primary-color);
}

.table-actions a {
    margin: 0 5px;
}

.badge {
    padding: 6px 12px;
    border-radius: 6px;
}

/* Image Grid */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.image-card {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.image-card:hover .image-overlay {
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}