/* Variables CSS */
:root {
    --blue-primary: #1e3a8a;
    --blue-secondary: #3b82f6;
    --blue-light: #dbeafe;
    --gray-dark: #374151;
    --gray-medium: #6b7280;
    --gray-light: #f3f4f6;
    --gold: #d4af37;
    --silver: #c0c0c0;
    --white: #ffffff;
    --black: #000000;
}

/* Reset y base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Source Sans Pro', sans-serif;
    line-height: 1.6;
    color: var(--gray-dark);
    overflow-x: hidden;
    font-display: swap;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Secciones */
.section {
    padding: 3rem 0;
    content-visibility: auto;
    contain-intrinsic-size: 400px;
}

.section-title {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--blue-primary);
    position: relative;
    font-family: 'Roboto Condensed', sans-serif;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--gold);
}

/* Tecnología */
.technology {
    background: var(--gray-light);
}

.tech-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.tech-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    will-change: transform;
    transform: translateZ(0);
}

.tech-card:hover {
    transform: translateY(-5px);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tech-card h3 {
    color: var(--blue-primary);
    margin-bottom: 1rem;
    font-family: 'Roboto Condensed', sans-serif;
}

/* Productos */
.products {
    background: var(--white);
}

.products-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.product-card {
    background: var(--gray-light);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid var(--gold);
    will-change: transform;
    transform: translateZ(0);
}

.product-card h3 {
    color: var(--blue-primary);
    margin-bottom: 1rem;
    font-family: 'Roboto Condensed', sans-serif;
}

.product-card ul {
    list-style: none;
    margin-top: 1rem;
}

.product-card li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.product-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--gold);
    font-weight: bold;
}

/* Garantías */
.guarantees {
    background: linear-gradient(135deg, var(--blue-light) 0%, var(--white) 100%);
}

.guarantees-content {
    display: grid;
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.guarantee-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--gold);
    will-change: transform;
    transform: translateZ(0);
}

.guarantee-item h3 {
    color: var(--blue-primary);
    margin-bottom: 1rem;
    font-family: 'Roboto Condensed', sans-serif;
}

/* Calculadora */
.calculator {
    background: var(--white);
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: start;
    will-change: transform;
    transform: translateZ(0);
}

.calculator-form {
    background: var(--gray-light);
    padding: 1.5rem;
    border-radius: 10px;
    order: 1;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid #e5e7eb;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: 'Source Sans Pro', sans-serif;
    min-height: 44px;
}

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

.help-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--gray-medium);
}

.calculator-result {
    background: var(--blue-light);
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    order: 2;
    transform: translateZ(0);
}

.km-result {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--blue-primary);
    margin: 1rem 0;
}

.time-result {
    font-size: 1.2rem;
    color: var(--gray-medium);
    margin-bottom: 1rem;
}

.stars-result {
    font-size: 2rem;
    color: var(--gold);
}

/* Contacto */
.contact {
    background: var(--gray-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    will-change: transform;
    transform: translateZ(0);
}

.contact-form {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    order: 1;
}

.contact-form h3 {
    color: var(--blue-primary);
    margin-bottom: 1.5rem;
    font-family: 'Roboto Condensed', sans-serif;
}

.contact-info {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    order: 2;
    transform: translateZ(0);
}

.contact-info h3 {
    color: var(--blue-primary);
    margin-bottom: 1.5rem;
    font-family: 'Roboto Condensed', sans-serif;
}

.contact-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item a {
    color: var(--blue-secondary);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.map-container {
    margin-top: 2rem;
    border-radius: 10px;
    overflow: hidden;
}

/* Footer */
.footer {
    background: var(--blue-primary);
    color: var(--white);
    padding: 2rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--gold);
    font-family: 'Roboto Condensed', sans-serif;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #e5e7eb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--gold);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Mejoras de accesibilidad */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles mejorados */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--blue-primary);
    outline-offset: 2px;
}

/* Reduce motion para preferencias del usuario */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .tech-card:hover,
    .product-card:hover {
        transform: none;
    }
}

/* Tablets */
@media (min-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
    
    .section {
        padding: 4rem 0;
    }
    
    .section-title {
        font-size: 2.5rem;
        margin-bottom: 3rem;
    }
    
    .tech-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }
    
    .tech-card,
    .product-card {
        padding: 2rem;
    }
    
    .calculator-container {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
    
    .calculator-form {
        order: 1;
    }
    
    .calculator-result {
        order: 1;
    }
    
    .contact-grid {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
    
    .contact-form {
        order: 1;
    }
    
    .contact-info {
        order: 1;
    }
    
    .calculator-form,
    .contact-form,
    .contact-info {
        padding: 2rem;
    }
    
    .footer-content {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        text-align: left;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
    
    .calculator-container {
        gap: 3rem;
    }
    
    .contact-grid {
        gap: 3rem;
    }
}

/* Optimización de imágenes */
img {
    max-width: 100%;
    height: auto;
}

/* Prevenir layout shifts */
.hero-image,
.moto-image img,
.thumb img {
    aspect-ratio: 16 / 9;
}