:root {
    --primary-blue: #003366;
    --primary-green: #2ecc71;
    --primary-red: #e74c3c;
    --light-bg: #f4f7f6;
    --white: #ffffff;
    --text-dark: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--light-bg);
    color: var(--text-dark);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
}

.logo-icon {
    color: var(--primary-blue);
    font-size: 1.8rem;
}

.text-red { color: var(--primary-red); }
.text-green { color: var(--primary-green); }

.nav a {
    text-decoration: none;
    color: var(--primary-blue);
    font-weight: 600;
    margin-left: 20px;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav a:hover {
    color: var(--primary-green);
}

.cart-badge {
    background-color: var(--primary-red);
    color: var(--white);
    font-size: 0.8rem;
    padding: 2px 8px;
    border-radius: 20px;
    margin-left: 5px;
}

/* Main Content */
main {
    flex: 1;
    padding: 40px 0;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, rgba(0, 51, 102, 0.9) 0%, rgba(0, 80, 158, 0.9) 100%), url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    color: var(--white);
    text-align: center;
    padding: 100px 20px;
    border-radius: 12px;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.product-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    cursor: pointer;
}

.product-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.product-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--primary-blue);
    cursor: pointer;
}

.product-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: 15px;
}

.btn {
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    width: 100%;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #002244;
}

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

.btn-green:hover {
    background-color: #27ae60;
}

/* Product Detail Page */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.detail-img {
    width: 100%;
    border-radius: 12px;
    object-fit: cover;
}

.detail-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.detail-title {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.detail-price {
    font-size: 1.5rem;
    color: var(--primary-green);
    font-weight: 700;
    margin-bottom: 20px;
}

.detail-desc {
    color: var(--text-light);
    margin-bottom: 30px;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.quantity-selector input {
    width: 60px;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    text-align: center;
    font-size: 1rem;
}

/* Cart Page */
.cart-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.cart-table th, .cart-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.cart-table th {
    background-color: var(--primary-blue);
    color: var(--white);
    font-weight: 600;
}

.cart-table td {
    vertical-align: middle;
}

.cart-item-flex {
    display: flex;
    align-items: center;
    gap: 15px;
}

.cart-item-img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 6px;
}

.cart-summary {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    text-align: right;
}

.cart-summary h3 {
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.cart-summary .btn {
    width: auto;
    display: inline-block;
    padding: 12px 30px;
}

/* Checkout Page */
.checkout-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.checkout-form {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.checkout-form h2 {
    margin-bottom: 20px;
    color: var(--primary-blue);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
}

.order-summary {
    background: var(--primary-blue);
    color: var(--white);
    padding: 30px;
    border-radius: 12px;
    height: fit-content;
}

.order-summary h3 {
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding-bottom: 10px;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
}

.summary-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.2rem;
    font-weight: 700;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.2);
}

/* Footer */
.footer {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 40px 0;
    margin-top: auto;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.footer h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.footer h3 small {
    font-size: 0.9rem;
    font-weight: 400;
    opacity: 0.8;
}

.footer .tagline {
    color: var(--primary-green);
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-branches h4 {
    margin-bottom: 15px;
    color: var(--primary-green);
}

.footer-branches ul {
    list-style: none;
}

.footer-branches ul li {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.footer-branches ul li::before {
    content: "•";
    color: var(--primary-red);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.modal-overlay.hidden .modal-content {
    transform: translateY(-50px);
}

.success-icon {
    font-size: 4rem;
    color: var(--primary-green);
    margin-bottom: 20px;
}

.modal-content h2 {
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.modal-content p {
    margin-bottom: 25px;
    color: var(--text-light);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}
.empty-state i {
    font-size: 4rem;
    color: var(--border-color);
    margin-bottom: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .product-detail {
        grid-template-columns: 1fr;
    }
    .checkout-container {
        grid-template-columns: 1fr;
    }
    .footer-container {
        grid-template-columns: 1fr;
    }
    .cart-table {
        display: block;
        overflow-x: auto;
    }
}