:root {
    --primary-color: #4361ee;
    --primary-light: #4895ef;
    --primary-dark: #3f37c9;
    --accent-color: #f72585;
    --secondary-color: #4cc9f0;
    --text-light: #f8f9fa;
    --text-dark: #212529;
    --background-light: #ffffff;
    --background-dark: #f8f9fa;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --success-color: #0ead69;
    --warning-color: #ff9e00;
    --danger-color: #e63946;
}

body {
    font-family: 'Noto Sans TC', 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    background-color: var(--background-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
}

/* Main content wrapper */
.content-wrapper {
    flex: 1 0 auto;
    display: flex;
    flex-direction: column;
}

/* Navbar Styling */
.navbar {
    background-color: var(--background-light) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 12px 0;
    transition: all 0.3s ease;
}

.navbar-dark {
    --bs-navbar-color: var(--text-dark);
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    font-size: 1.5rem;
}

.navbar-dark .navbar-nav .nav-link {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(67, 97, 238, 0.05);
}

.navbar-dark .navbar-nav .active>.nav-link, 
.navbar-dark .navbar-nav .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(67, 97, 238, 0.1);
}

/* Button Styling */
.btn {
    border-radius: 8px;
    padding: 0.5rem 1.25rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

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

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Cart Badge */
.cart-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.cart-badge {
    position: absolute;
    top: -8px;
    right: -10px;
    background-color: var(--accent-color) !important;
    color: var(--text-light) !important;
    border-radius: 50%;
    font-size: 0.7rem;
    min-width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.fa-shopping-cart {
    color: var(--primary-color);
}

/* Card Styling */
.card {
    border: none;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: var(--primary-light);
    color: var(--text-light);
    font-weight: 600;
    padding: 1rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background-color: var(--background-light);
    border-top: 1px solid var(--gray-200);
}

.card-img-top {
    height: 200px;
    object-fit: cover;
}

/* Alerts */
.alert {
    border-radius: 8px;
    border: none;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.alert-success {
    background-color: rgba(14, 173, 105, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background-color: rgba(255, 158, 0, 0.1);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background-color: rgba(230, 57, 70, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color)) !important;
    color: var(--text-light) !important;
    padding: 30px 0 !important;
    border-top-left-radius: 30px;
    border-top-right-radius: 30px;
    flex-shrink: 0;
}

/* List Group */
.list-group-item {
    border: none;
    padding: 0.75rem 1.25rem;
    transition: all 0.2s ease;
}

.list-group-item:hover {
    background-color: rgba(67, 97, 238, 0.05);
}

.list-group-item.active {
    background-color: var(--primary-color);
    color: var(--text-light);
}

/* Tables */
.table {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

.table thead th {
    background-color: var(--primary-color);
    color: var(--text-light);
    font-weight: 600;
    border-bottom: none;
}

.table-hover tbody tr:hover {
    background-color: rgba(67, 97, 238, 0.05);
    color: var(--text-dark);
}

/* Product cards special styling */
.product-card {
    height: 100%;
}

.product-card .card-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-dark);
}

.product-card .price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    margin: 0.5rem 0;
}

/* Home page hero section */
.hero-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(76, 201, 240, 0.1));
    border-radius: 20px;
    margin-bottom: 3rem;
    overflow: hidden;
}

.hero-section .hero-image {
    width: 100%;
    height: auto;
    max-width: 400px;
    margin: 0 auto;
    display: block;
    object-fit: contain;
    max-height: 400px;
}

.hero-section .svg-container {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    position: relative;
}

.hero-section .hero-image-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    height: 100%;
    min-height: 300px;
}

.hero-section .display-4 {
    font-weight: 700;
    color: var(--primary-dark);
}

.hero-section .lead {
    color: var(--text-dark);
    margin-bottom: 2rem;
}

@media (max-width: 991.98px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .hero-section .hero-image {
        max-width: 300px;
        margin-top: 2rem;
        max-height: 300px;
    }
    
    .hero-section .svg-container {
        max-width: 300px;
    }
}

/* Animation classes */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.5s ease-in-out;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}