/* ============================================
   H2TECK - Hidráulica Residencial
   Modern CSS with CSS Variables
   ============================================ */

/* === CSS Variables === */
:root {
    /* Colors */
    --primary-dark: #0a1628;
    --primary-medium: #1565c0;
    --primary-light: #2196f3;
    --accent: #ff6b35;
    --success: #25D366;
    --white: #ffffff;
    --gray-light: #f5f7fa;
    --gray-medium: #e0e5eb;
    --gray-dark: #64748b;
    --text-dark: #1e293b;
    --text-light: #64748b;
    
    /* Typography */
    --font-body: 'Inter', sans-serif;
    --font-heading: 'Poppins', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(10, 22, 40, 0.08);
    --shadow-md: 0 4px 16px rgba(10, 22, 40, 0.12);
    --shadow-lg: 0 8px 32px rgba(10, 22, 40, 0.16);
    --shadow-xl: 0 16px 48px rgba(10, 22, 40, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* === Reset & Base Styles === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--white);
    /* Performance optimizations */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    /* Performance */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

ul {
    list-style: none;
}

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

/* === Section Spacing === */
section {
    padding: var(--spacing-xl) 0;
}

/* === Section Headers === */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-subtitle {
    display: inline-block;
    color: var(--primary-medium);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: var(--spacing-xs);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    cursor: pointer;
    white-space: nowrap;
    /* Performance */
    will-change: transform;
    transform: translateZ(0);
}

.btn-primary {
    background: var(--success);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: #20ba5a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-medium);
    border: 2px solid var(--primary-medium);
}

.btn-secondary:hover {
    background: var(--primary-medium);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-whatsapp-nav {
    background: var(--success);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

.btn-whatsapp-nav:hover {
    background: #20ba5a;
}

.btn-whatsapp-large {
    background: var(--success);
    color: var(--white);
    font-size: 1.25rem;
    padding: 1.25rem 3rem;
    box-shadow: var(--shadow-lg);
}

.btn-whatsapp-large:hover {
    background: #20ba5a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* === Utility Classes === */
.mt-2 {
    margin-top: var(--spacing-md);
}

/* === Header/Navbar === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
    /* Performance */
    will-change: box-shadow;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--spacing-md);
    min-height: 80px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-dark);
}

.logo span {
    color: var(--primary-medium);
}

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

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

.nav-link {
    font-weight: 500;
    color: var(--text-dark);
    padding: 0.5rem 0;
    position: relative;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    width: 30px;
    height: 24px;
    cursor: pointer;
}

.hamburger {
    width: 100%;
    height: 3px;
    background: var(--primary-dark);
    border-radius: 2px;
    transition: var(--transition-normal);
}

/* === Hero Section === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1a3a5c 100%);
    color: var(--white);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(33, 150, 243, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(33, 150, 243, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

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

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
    text-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    opacity: 0.95;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 2;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: auto;
}

/* === Why Choose Section === */
.why-choose {
    background: var(--gray-light);
    padding: var(--spacing-lg) 0;
}

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

.why-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

.why-icon {
    font-size: 2.5rem;
    color: var(--primary-medium);
    flex-shrink: 0;
}

.why-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.25rem;
}

.why-content p {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* === Services Section === */
.services {
    background: var(--white);
}

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

.service-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-medium);
    transition: var(--transition-normal);
    cursor: pointer;
}

.service-card:hover {
    border-color: var(--primary-medium);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-medium), var(--primary-light));
    color: var(--white);
    font-size: 1.75rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.service-description {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* === About Section === */
.about {
    background: var(--gray-light);
}

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

.about-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.8;
}

.about-text strong {
    color: var(--primary-medium);
    font-weight: 600;
}

.about-features {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.about-features h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
}

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

.features-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-dark);
    font-size: 0.95rem;
}

.features-list i {
    color: var(--success);
    font-size: 1.25rem;
    flex-shrink: 0;
}

/* === Process Section === */
.process {
    background: var(--white);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    position: relative;
}

.process-step {
    background: var(--gray-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    transition: var(--transition-normal);
}

.process-step:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--primary-medium);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: var(--spacing-md) auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-medium));
    color: var(--white);
    font-size: 2rem;
    border-radius: 50%;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.step-description {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* === Testimonials Section === */
.testimonials {
    background: var(--gray-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.testimonial-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

.testimonial-rating {
    display: flex;
    gap: 0.25rem;
    margin-bottom: var(--spacing-sm);
}

.testimonial-rating i {
    color: #fbbf24;
    font-size: 1rem;
}

.testimonial-text {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--gray-medium);
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--primary-light);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.author-name {
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.25rem;
}

.author-location {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* === FAQ Section === */
.faq {
    background: var(--white);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border: 2px solid var(--gray-medium);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    transition: var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--primary-light);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--primary-dark);
    text-align: left;
    cursor: pointer;
    transition: var(--transition-normal);
}

.faq-question:hover {
    color: var(--primary-medium);
}

.faq-question i {
    font-size: 1rem;
    transition: var(--transition-normal);
    flex-shrink: 0;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--text-light);
    line-height: 1.8;
}

/* === Contact CTA Section === */
.contact-cta {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1a3a5c 100%);
    color: var(--white);
    text-align: center;
}

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

.contact-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.contact-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-light);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    opacity: 0.8;
}

.contact-item a {
    color: var(--white);
    font-weight: 600;
}

.contact-item a:hover {
    color: var(--primary-light);
}

.contact-item p {
    font-size: 0.95rem;
    line-height: 1.5;
}

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

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

.footer-column h3,
.footer-column h4 {
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-heading);
}

.footer-column p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    font-size: 0.95rem;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-normal);
}

.social-links a:hover {
    background: var(--primary-medium);
    transform: translateY(-3px);
}

.footer-links,
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-links a,
.footer-contact a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-fast);
}

.footer-links a:hover,
.footer-contact a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-contact i {
    color: var(--primary-light);
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* === Floating WhatsApp Button === */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--success);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: var(--shadow-xl);
    z-index: 999;
    transition: var(--transition-normal);
    animation: pulse 2s infinite;
}

.whatsapp-float:hover {
    background: #20ba5a;
    transform: scale(1.1);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
    }
    50% {
        box-shadow: 0 0 0 20px rgba(37, 211, 102, 0);
    }
}

/* === Reveal Animation === */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    /* Performance */
    will-change: opacity, transform;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
    will-change: auto;
}

/* === Responsive Design === */

/* Tablet */
@media (max-width: 992px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .process-timeline {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }
    
    .navbar {
        padding: 1rem var(--spacing-sm);
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--spacing-md);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-lg);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--gray-medium);
        width: 100%;
    }
    
    .btn-whatsapp-nav {
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-sm);
    }
    
    .hero {
        min-height: 80vh;
        padding: var(--spacing-xl) 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-description {
        font-size: 1rem;
    }
    
    .why-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .process-timeline {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-title {
        font-size: 1.75rem;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .whatsapp-float {
        width: 55px;
        height: 55px;
        bottom: 20px;
        right: 20px;
        font-size: 1.75rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .hero-badges {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .service-card {
        padding: var(--spacing-sm);
    }
}