:root {
    /* Color Palette - Basado en refrigeración y climatización */
    --primary-blue: #0A4D8C;
    --primary-cyan: #00A3E0;
    --accent-orange: #FF6B35;
    --dark-navy: #0D1B2A;
    --light-blue: #E8F4F8;
    --ice-white: #F8FBFD;
    --cool-gray: #778DA9;
    --warm-gradient: linear-gradient(135deg, #FF6B35 0%, #F7931E 100%);
    --cool-gradient: linear-gradient(135deg, #00A3E0 0%, #0A4D8C 100%);
    --frost-gradient: linear-gradient(180deg, rgba(0, 163, 224, 0.05) 0%, rgba(10, 77, 140, 0.1) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;
    
    /* Animation */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-glow: 0 0 40px rgba(0, 163, 224, 0.2);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--dark-navy);
    background: var(--ice-white);
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--cool-gradient);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 107, 53, 0.15) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: var(--spacing-md);
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-container {
    margin-bottom: var(--spacing-lg);
}

.brand {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #ffffff 0%, #E8F4F8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: clamp(0.9rem, 2vw, 1.2rem);
    font-weight: 300;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    opacity: 0.95;
}

.hero-description {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    max-width: 700px;
    margin: var(--spacing-lg) auto;
    line-height: 1.8;
    opacity: 0.9;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2.5rem;
    background: white;
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    margin-top: var(--spacing-md);
}

.cta-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    background: var(--light-blue);
}

.cta-button svg {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    60% { transform: translateY(-4px); }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.scroll-line {
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.8) 50%, rgba(255, 255, 255, 0) 100%);
    animation: scrollAnim 2s ease-in-out infinite;
}

@keyframes scrollAnim {
    0%, 100% { transform: translateY(-20px); opacity: 0; }
    50% { transform: translateY(0); opacity: 1; }
}

/* Sticky Navigation Index */
.index-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: white;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.index-nav.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav-wrapper {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-wrapper::-webkit-scrollbar {
    height: 4px;
}

.nav-wrapper::-webkit-scrollbar-thumb {
    background: var(--primary-cyan);
    border-radius: 10px;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--cool-gray);
}

.nav-icon {
    font-size: 1.5rem;
    transition: transform var(--transition-fast);
}

.nav-item:hover {
    background: var(--frost-gradient);
    border-color: var(--primary-cyan);
    color: var(--primary-blue);
}

.nav-item:hover .nav-icon {
    transform: scale(1.2);
}

.nav-item.active {
    background: var(--cool-gradient);
    color: white;
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-sm);
}

/* Services Section */
main {
    padding: var(--spacing-xl) 0;
}

.service-card {
    background: white;
    border-radius: 24px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-slow);
    scroll-margin-top: 100px;
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.service-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.service-icon {
    font-size: 4rem;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--frost-gradient);
    border-radius: 20px;
    flex-shrink: 0;
}

.service-title-wrapper {
    flex: 1;
}

.service-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.service-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--cool-gray);
    font-weight: 400;
}

.service-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.service-content.reverse {
    direction: rtl;
}

.service-content.reverse > * {
    direction: ltr;
}

.service-description {
    padding: var(--spacing-md) 0;
}

.service-description > p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--frost-gradient);
    border-radius: 16px;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

.feature:hover {
    border-color: var(--primary-cyan);
    background: linear-gradient(135deg, rgba(0, 163, 224, 0.08) 0%, rgba(10, 77, 140, 0.12) 100%);
    transform: translateX(8px);
}

.feature-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-cyan);
    flex-shrink: 0;
}

.feature h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 0.25rem;
}

.feature p {
    font-size: 0.9rem;
    color: var(--cool-gray);
    line-height: 1.5;
}

.service-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    aspect-ratio: 4/3;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.service-card:hover .service-image img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(10, 77, 140, 0) 0%, rgba(10, 77, 140, 0.3) 100%);
    pointer-events: none;
}

/* Contact Section */
.contact-section {
    background: var(--cool-gradient);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    color: white;
    scroll-margin-top: 100px;
}

.contact-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.contact-header h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

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

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.contact-card.cta-highlight {
    background: var(--warm-gradient);
    border-color: rgba(255, 255, 255, 0.3);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.contact-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.contact-card a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    transition: opacity var(--transition-fast);
}

.contact-card a:hover {
    opacity: 0.8;
}

.contact-card p {
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.6;
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-weight: 600;
    margin-top: var(--spacing-sm);
    transition: all var(--transition-normal);
}

.whatsapp-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

/* Footer */
.footer {
    background: var(--dark-navy);
    color: white;
    padding: var(--spacing-lg) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    opacity: 0.7;
    font-size: 0.9rem;
}

.footer-info {
    text-align: right;
}

.footer-info p {
    opacity: 0.7;
    font-size: 0.9rem;
}

.footer-link a {
    color: var(--primary-cyan);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.footer-link a:hover {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 968px) {
    .service-content,
    .service-content.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    
    .service-header {
        flex-direction: column;
        text-align: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-info {
        text-align: center;
    }
}

@media (max-width: 640px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }
    
    .service-card {
        padding: var(--spacing-md);
    }
    
    .nav-wrapper {
        justify-content: flex-start;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .nav-item {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .nav-icon {
        font-size: 1.25rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations on Scroll */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Print Styles */
@media print {
    .hero,
    .index-nav,
    .scroll-indicator,
    .cta-button {
        display: none;
    }
    
    .service-card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}