:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --dark-color: #212529;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Navbar */
.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

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

/* Category Cards */
.category-card {
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.category-card:hover::before {
    opacity: 1;
}

.category-card .card-body {
    position: relative;
    z-index: 2;
    transition: all 0.3s ease;
}

.category-card:hover .card-body {
    transform: translateY(-5px);
    color: white !important;
}

.category-card:hover .card-body * {
    color: white !important;
}

.category-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.3) !important;
}

/* Product Cards */
.product-card {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid #e0e0e0;
    overflow: hidden;
    position: relative;
}

.product-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.product-card:hover::after {
    opacity: 1;
}

.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.25) !important;
    border-color: var(--primary-color);
}

.product-card .card-img-top {
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .card-img-top {
    transform: scale(1.1) rotate(2deg);
}

.product-card .card-img-container {
    overflow: hidden;
    position: relative;
}

.placeholder-img {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Buttons */
.btn {
    transition: all 0.2s ease;
}

.btn:hover {
    opacity: 0.9;
}

.btn:active {
    transform: scale(0.98);
}

/* Forms */
.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Alerts */
.alert {
    border-radius: 10px;
    border: none;
}

/* Footer */
footer a:hover {
    color: var(--primary-color) !important;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 1.1rem;
    }
}

/* Badge */
.badge {
    font-weight: 600;
    padding: 0.5em 0.8em;
}

/* Loading spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Sticky elements */
.sticky-top {
    z-index: 1020;
}

/* Table */
.table {
    margin-bottom: 0;
}

.table thead th {
    border-bottom: 2px solid var(--primary-color);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0b5ed7;
}

/* List group */
.list-group-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.list-group-item:hover {
    background-color: #f8f9fa;
}