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

:root {
    /* Colores basados en el logo de HidraGas */
    --primary-blue: #47a9d7;
    --secondary-blue: #4c96da;
    --accent-green: #7cb342;
    --dark-blue: #2c5aa0;
    --light-blue: #e3f2fd;
    
    /* Colores neutros */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #6c757d;
    --dark-gray: #343a40;
    --black: #000000;
    
    /* Tipografía */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Bordes */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Transiciones */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo .logo {
    height: 90px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

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

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

.cta-button {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(71, 169, 215, 0.3);
    transition: var(--transition-fast);
}

.nav-toggle:hover {
    background: rgba(71, 169, 215, 0.1);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    transition: var(--transition-fast);
    border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
    padding: 120px 0 var(--spacing-3xl);
    background: linear-gradient(135deg, var(--light-blue) 0%, rgba(255, 255, 255, 0.8) 100%);
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%2347a9d7" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    color: var(--dark-gray);
}

.title-highlight {
    color: var(--primary-blue);
    display: block;
    font-size: var(--font-size-5xl);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--gray);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--dark-gray);
    font-weight: 500;
}

.feature-item i {
    color: var(--primary-blue);
    font-size: var(--font-size-lg);
    width: 24px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.cta-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-secondary {
    background: transparent;
    color: var(--primary-blue);
    padding: var(--spacing-md) var(--spacing-xl);
    border: 2px solid var(--primary-blue);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
}

.cta-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-img {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(var(--shadow-xl));
    animation: float 6s ease-in-out infinite;
}

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

/* Secciones */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

/* Servicios */
.services {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid rgba(71, 169, 215, 0.1);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.service-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.service-icon i {
    font-size: var(--font-size-2xl);
    color: var(--primary-blue);
}

.service-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
}

.service-card p {
    color: var(--gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.service-card ul {
    list-style: none;
}

.service-card li {
    color: var(--gray);
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-lg);
}

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

/* Productos */
.products {
    padding: var(--spacing-3xl) 0;
    background: var(--light-gray);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.product-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    height: 200px;
    overflow: hidden;
    background: var(--light-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.product-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.product-content {
    padding: var(--spacing-xl);
}

.product-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-sm);
}

.product-content p {
    color: var(--gray);
    margin-bottom: var(--spacing-lg);
}

.product-content ul {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.product-content li {
    color: var(--gray);
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-lg);
}

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

.product-cta {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
    display: inline-block;
}

.product-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Por qué elegirnos */
.why-choose {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

/* Video Section */
.video-section {
    padding: var(--spacing-3xl) 0;
    background: var(--light-gray);
}

.video-container {
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: var(--white);
    padding: var(--spacing-lg);
}

.professional-video {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    background: var(--dark-gray);
}

.professional-video:focus {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    transition: var(--transition-normal);
}

.feature-card:hover {
    background: var(--light-blue);
    transform: translateY(-5px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.feature-icon i {
    font-size: var(--font-size-2xl);
    color: var(--white);
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    color: var(--gray);
    line-height: 1.6;
}

/* Contacto */
.contact {
    padding: var(--spacing-3xl) 0;
    background: var(--light-gray);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    color: var(--white);
    font-size: var(--font-size-lg);
}

.contact-details h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-sm);
}

.contact-details p {
    color: var(--gray);
    line-height: 1.6;
}

/* Formulario */
.contact-form {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
}

.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 500;
    color: var(--dark-gray);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius-md);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(71, 169, 215, 0.1);
}

.form-submit {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: var(--transition-normal);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* WhatsApp CTA */
.whatsapp-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.whatsapp-button {
    background: #25d366;
    color: var(--white);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-lg);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.whatsapp-button:hover {
    background: #128c7e;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.whatsapp-button i {
    font-size: var(--font-size-xl);
}

/* Footer */
.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo img {
    height: 70px;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 2px 4px rgba(255, 255, 255, 0.1));
}

.footer-logo p {
    color: #adb5bd;
    margin-bottom: var(--spacing-md);
}

.social-icons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: var(--font-size-lg);
}

.social-icons a:hover {
    background: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.footer-links h4,
.footer-contact h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

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

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: #adb5bd;
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-blue);
}

.footer-contact p {
    color: #adb5bd;
    margin-bottom: var(--spacing-sm);
}

.footer-bottom {
    border-top: 1px solid #495057;
    padding-top: var(--spacing-lg);
    text-align: center;
    color: #adb5bd;
}

.footer-bottom p {
    margin-bottom: var(--spacing-sm);
}

.footer-bottom a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-bottom a:hover {
    color: var(--secondary-blue);
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-logo .logo {
        height: 100px;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xl);
        transition: left 0.3s ease-in-out;
        z-index: 999;
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        left: 0;
        display: flex;
    }
    
    .nav-menu .nav-link {
        font-size: var(--font-size-xl);
        font-weight: 600;
        color: var(--dark-gray);
        text-decoration: none;
        padding: var(--spacing-md);
        border-radius: var(--border-radius-md);
        transition: var(--transition-normal);
    }
    
    .nav-menu .nav-link:hover {
        background: var(--light-blue);
        color: var(--primary-blue);
    }
    
    .nav-menu .cta-button {
        background: var(--primary-blue);
        color: var(--white);
        padding: var(--spacing-md) var(--spacing-xl);
        border-radius: var(--border-radius-lg);
        font-weight: 600;
        text-decoration: none;
        transition: var(--transition-normal);
    }
    
    .nav-menu .cta-button:hover {
        background: var(--secondary-blue);
        transform: translateY(-2px);
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1000;
        position: relative;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .title-highlight {
        font-size: var(--font-size-4xl);
        padding-top: var(--spacing-lg);
        margin-top: var(--spacing-md);
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        max-width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-container {
        padding: 0 var(--spacing-md);
    }
    
    .video-container {
        padding: var(--spacing-md);
        margin: 0 var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .nav-logo .logo {
        height: 110px;
    }
    
    .hero {
        padding: 100px 0 var(--spacing-xl);
    }
    
    .hero-container {
        padding: 0 var(--spacing-lg);
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .title-highlight {
        font-size: var(--font-size-3xl);
        padding-top: var(--spacing-xl);
        margin-top: var(--spacing-lg);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-primary,
    .cta-secondary {
        width: 100%;
        text-align: center;
        justify-content: center;
    }
}

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

.service-card,
.product-card,
.feature-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Scroll suave */
html {
    scroll-behavior: smooth;
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}


/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 40px;
    right: 40px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 2px 2px 3px #999;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.3s ease;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 3px 3px 5px #777;
}

.whatsapp-float i {
    margin-top: 0;
}

@media (max-width: 768px) {
    .whatsapp-float {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 25px;
    }
}