:root {
    --primary: #3b82f6;
    --primary-dark: #1e40af;
    --primary-light: #60a5fa;
    --accent: #0ea5e9;
    --accent-dark: #0284c7;
    
    --bg-light: #ffffff;
    --bg-light-secondary: #f8fafc;
    --bg-light-tertiary: #f1f5f9;
    
    --bg-dark: #0a0e27;
    --bg-dark-secondary: #111829;
    --bg-dark-tertiary: #1a202c;
    
    --text-light: #0f172a;
    --text-light-secondary: #475569;
    --text-dark: #f8fafc;
    --text-dark-secondary: #cbd5e1;
    
    --border-light: #e2e8f0;
    --border-dark: #334155;
    
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-light);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body.dark-mode {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

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

header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-light);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

body.dark-mode header {
    background-color: var(--bg-dark-secondary);
    border-bottom-color: var(--border-dark);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.logo img {
    width: 40px;
    height: 40px;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: inherit;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.cart-toggle {
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: inherit;
    position: relative;
    transition: transform 0.3s ease;
}

.cart-toggle:hover {
    transform: scale(1.1);
}

.cart-toggle svg {
    width: 24px;
    height: 24px;
}

.cart-count {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--primary);
    color: white;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

.cart-count.hidden {
    display: none;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: inherit;
    transition: transform 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.icon-sun,
.icon-moon {
    width: 24px;
    height: 24px;
    position: absolute;
    opacity: 1;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.icon-moon {
    opacity: 0;
    transform: rotate(-180deg);
}

body.dark-mode .icon-sun {
    opacity: 0;
    transform: rotate(180deg);
}

body.dark-mode .icon-moon {
    opacity: 1;
    transform: rotate(0deg);
}

.hero {
    padding: 120px 20px;
    text-align: center;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    transition: background 0.3s ease;
}

body.dark-mode .hero {
    background: linear-gradient(135deg, #082f4f 0%, #0c2d48 100%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: clamp(32px, 8vw, 56px);
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-light);
}

body.dark-mode .hero h1 {
    color: var(--text-dark);
}

.hero p {
    font-size: clamp(16px, 4vw, 20px);
    color: var(--text-light-secondary);
    margin-bottom: 32px;
}

body.dark-mode .hero p {
    color: var(--text-dark-secondary);
}

.btn {
    padding: 12px 32px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

main > section {
    padding: 80px 20px;
}

main > section h2 {
    font-size: clamp(28px, 6vw, 48px);
    font-weight: 700;
    margin-bottom: 60px;
    text-align: center;
    color: var(--text-light);
}

body.dark-mode main > section h2 {
    color: var(--text-dark);
}

.catalogo {
    background-color: var(--bg-light-secondary);
    transition: background-color 0.3s ease;
}

body.dark-mode .catalogo {
    background-color: var(--bg-dark-secondary);
}

.productos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.producto-card {
    background-color: white;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
}

body.dark-mode .producto-card {
    background-color: var(--bg-dark-tertiary);
    border-color: var(--border-dark);
}

.producto-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.1);
}

body.dark-mode .producto-card:hover {
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.3);
}

.producto-imagen {
    width: 120px;
    height: 120px;
    margin: 0 auto 16px;
    background-color: #f0f9ff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: background-color 0.3s ease;
}

body.dark-mode .producto-imagen {
    background-color: rgba(59, 130, 246, 0.1);
}

.producto-imagen svg {
    width: 80px;
    height: 80px;
}

.producto-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-light);
}

body.dark-mode .producto-card h3 {
    color: var(--text-dark);
}

.producto-card p {
    color: var(--text-light-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

body.dark-mode .producto-card p {
    color: var(--text-dark-secondary);
}

.precio {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.btn-add-cart {
    background-color: var(--accent);
    color: white;
    margin-top: 12px;
    width: 100%;
}

.btn-add-cart:hover {
    background-color: var(--accent-dark);
}

.btn-checkout {
    width: 100%;
    margin-top: 16px;
}

.btn-checkout:disabled {
    background-color: #9ca3af;
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-submit {
    width: 100%;
    margin-top: 16px;
}

.preventa {
    background-color: var(--bg-light);
    transition: background-color 0.3s ease;
}

body.dark-mode .preventa {
    background-color: var(--bg-dark);
}

.preventa-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.preventa-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: 12px;
    padding: 32px;
    position: relative;
    border-left: 4px solid var(--primary);
    transition: all 0.3s ease;
}

body.dark-mode .preventa-card {
    background: linear-gradient(135deg, #1a3a52 0%, #0f2847 100%);
}

.preventa-card:hover {
    transform: translateY(-4px);
}

.preventa-etiqueta {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.preventa-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-light);
}

body.dark-mode .preventa-card h3 {
    color: var(--text-dark);
}

.preventa-card p {
    color: var(--text-light-secondary);
    font-size: 14px;
    margin-bottom: 12px;
}

body.dark-mode .preventa-card p {
    color: var(--text-dark-secondary);
}

.preventa-fecha {
    font-style: italic;
    font-size: 13px;
    color: var(--primary);
    margin-top: 16px;
}

.acerca {
    background-color: var(--bg-light-secondary);
    transition: background-color 0.3s ease;
}

body.dark-mode .acerca {
    background-color: var(--bg-dark-secondary);
}

.acerca-content {
    max-width: 800px;
    margin: 0 auto;
}

.acerca-content p {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--text-light-secondary);
    line-height: 1.8;
}

body.dark-mode .acerca-content p {
    color: var(--text-dark-secondary);
}

.contacto {
    background-color: var(--bg-light);
    transition: background-color 0.3s ease;
}

body.dark-mode .contacto {
    background-color: var(--bg-dark);
}

.contacto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.contacto-item {
    text-align: center;
    padding: 32px;
    background-color: var(--bg-light-secondary);
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
}

body.dark-mode .contacto-item {
    background-color: var(--bg-dark-tertiary);
    border-color: var(--border-dark);
}

.contacto-item:hover {
    border-color: var(--primary);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.1);
}

body.dark-mode .contacto-item:hover {
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.2);
}

.contacto-item svg {
    width: 48px;
    height: 48px;
    color: var(--primary);
    margin-bottom: 16px;
}

.contacto-item h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-light);
}

body.dark-mode .contacto-item h3 {
    color: var(--text-dark);
}

.contacto-item a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: color 0.3s ease;
}

.contacto-item a:hover {
    color: var(--primary-dark);
}

footer {
    background-color: var(--primary-dark);
    color: white;
    padding: 40px 20px;
    text-align: center;
    transition: background-color 0.3s ease;
}

body.dark-mode footer {
    background-color: var(--bg-dark);
}

footer p {
    font-size: 14px;
    opacity: 0.8;
}

.cart-sidebar {
    position: fixed;
    right: -400px;
    top: 0;
    width: 400px;
    height: 100vh;
    background-color: var(--bg-light);
    border-left: 1px solid var(--border-light);
    transition: right 0.3s ease;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
}

body.dark-mode .cart-sidebar {
    background-color: var(--bg-dark-secondary);
    border-left-color: var(--border-dark);
}

.cart-sidebar.active {
    right: 0;
}

.cart-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

body.dark-mode .cart-header {
    border-bottom-color: var(--border-dark);
    background-color: var(--bg-dark-tertiary);
}

.cart-header h2 {
    font-size: 20px;
    margin: 0;
    color: var(--text-light);
}

body.dark-mode .cart-header h2 {
    color: var(--text-dark);
}

.close-cart {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s ease;
}

body.dark-mode .close-cart {
    color: var(--text-dark);
}

.close-cart:hover {
    color: var(--primary);
}

.close-cart svg {
    width: 24px;
    height: 24px;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.empty-cart {
    text-align: center;
    color: var(--text-light-secondary);
    padding: 40px 20px;
}

body.dark-mode .empty-cart {
    color: var(--text-dark-secondary);
}

.cart-item {
    background-color: var(--bg-light-secondary);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

body.dark-mode .cart-item {
    background-color: var(--bg-dark-tertiary);
    border-color: var(--border-dark);
}

.cart-item:hover {
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}

body.dark-mode .cart-item:hover {
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

.cart-item-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 12px;
}

.cart-item-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-light);
}

body.dark-mode .cart-item-name {
    color: var(--text-dark);
}

.cart-item-price {
    color: var(--primary);
    font-weight: 600;
}

.cart-item-preventa {
    display: inline-block;
    background-color: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-top: 4px;
    margin-bottom: 8px;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: space-between;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    background-color: var(--bg-light);
}

body.dark-mode .quantity-controls {
    background-color: var(--bg-dark-secondary);
    border-color: var(--border-dark);
}

.qty-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: color 0.2s ease;
}

.qty-btn:hover {
    color: var(--primary-dark);
}

.quantity {
    width: 32px;
    text-align: center;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-light);
}

body.dark-mode .quantity {
    color: var(--text-dark);
}

.remove-item {
    background: none;
    border: none;
    cursor: pointer;
    color: #ef4444;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s ease;
}

.remove-item:hover {
    color: #dc2626;
}

.remove-item svg {
    width: 18px;
    height: 18px;
}

.cart-footer {
    padding: 20px;
    border-top: 1px solid var(--border-light);
    background-color: var(--bg-light-secondary);
}

body.dark-mode .cart-footer {
    border-top-color: var(--border-dark);
    background-color: var(--bg-dark-tertiary);
}

.cart-total {
    margin-bottom: 16px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-light);
}

body.dark-mode .cart-total {
    color: var(--text-dark);
}

.cart-total p {
    margin: 0;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2500;
    display: none;
}

.modal-overlay.active {
    display: block;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--bg-light);
    border-radius: 12px;
    z-index: 3000;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    display: none;
}

body.dark-mode .modal {
    background-color: var(--bg-dark-secondary);
}

.modal.active {
    display: block;
}

.modal-content {
    padding: 32px;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s ease;
}

body.dark-mode .modal-close {
    color: var(--text-dark);
}

.modal-close:hover {
    color: var(--primary);
}

.modal-close svg {
    width: 24px;
    height: 24px;
}

.modal h2 {
    margin-bottom: 24px;
    font-size: 24px;
    color: var(--text-light);
}

body.dark-mode .modal h2 {
    color: var(--text-dark);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
    color: var(--text-light);
}

body.dark-mode .form-group label {
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.3s ease;
    background-color: var(--bg-light);
    color: var(--text-light);
}

body.dark-mode .form-group input,
body.dark-mode .form-group textarea {
    background-color: var(--bg-dark-tertiary);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 400;
    color: var(--text-light);
}

body.dark-mode .radio-label {
    color: var(--text-dark);
}

.radio-label input[type="radio"] {
    width: auto;
    margin: 0;
    cursor: pointer;
}

.order-summary {
    background-color: var(--bg-light-secondary);
    padding: 16px;
    border-radius: 8px;
    margin-top: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--border-light);
}

body.dark-mode .order-summary {
    background-color: var(--bg-dark-tertiary);
    border-color: var(--border-dark);
}

.order-summary h3 {
    font-size: 14px;
    margin-bottom: 12px;
    margin-top: 0;
    color: var(--text-light);
    font-weight: 600;
}

body.dark-mode .order-summary h3 {
    color: var(--text-dark);
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-light);
}

body.dark-mode .summary-item {
    border-bottom-color: var(--border-dark);
    color: var(--text-dark);
}

.summary-item-qty {
    color: var(--text-light-secondary);
    font-size: 12px;
}

body.dark-mode .summary-item-qty {
    color: var(--text-dark-secondary);
}

.summary-total {
    font-weight: 600;
    font-size: 14px;
    padding-top: 8px;
    border-top: 2px solid var(--border-light);
    margin-top: 8px;
    color: var(--primary);
}

body.dark-mode .summary-total {
    border-top-color: var(--border-dark);
}

.summary-total p {
    margin: 0;
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-light-secondary);
}

body.dark-mode .loading {
    color: var(--text-dark-secondary);
}

.error-message {
    background-color: rgba(220, 38, 38, 0.1);
    color: #dc2626;
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    border: 1px solid rgba(220, 38, 38, 0.3);
}

@media (max-width: 768px) {
    .cart-sidebar {
        width: 100%;
        right: -100%;
    }

    .header-content {
        height: 60px;
    }

    .nav {
        gap: 16px;
        font-size: 13px;
    }

    .logo {
        gap: 8px;
        font-size: 16px;
    }

    .logo img {
        width: 32px;
        height: 32px;
    }

    main > section {
        padding: 60px 20px;
    }

    .productos-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }

    .preventa-grid {
        grid-template-columns: 1fr;
    }

    .contacto-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .contacto-item {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .nav {
        gap: 12px;
        font-size: 12px;
    }

    .hero {
        padding: 80px 20px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 14px;
    }

    .productos-grid {
        grid-template-columns: 1fr;
    }

    main > section h2 {
        font-size: 24px;
    }

    .producto-card {
        padding: 16px;
    }

    .modal {
        width: 95%;
        max-height: 95vh;
    }

    .modal-content {
        padding: 20px;
    }
}