/* ============================================
   TERRANOVA CONSTRUCTORA - Estilos Principales
   Diseño Premium · Responsive · Modo Oscuro
   ============================================ */

/* === Google Fonts === */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700;800&family=Outfit:wght@300;400;500;600;700&display=swap');

/* === Variables CSS === */
:root {
    /* Colores corporativos */
    --azul-primario: #1B3A5C;
    --azul-medio: #2A5F8F;
    --azul-claro: #4A90C4;
    --dorado: #C8973E;
    --dorado-claro: #E8B85A;
    --dorado-oscuro: #A67B2E;

    /* Fondos y superficies */
    --bg-principal: #FAFAFA;
    --bg-seccion-alt: #F0F2F5;
    --bg-card: #FFFFFF;
    --bg-footer: #0F1923;
    --bg-hero-overlay: rgba(15, 25, 35, 0.75);

    /* Textos */
    --texto-principal: #1A1A2E;
    --texto-secundario: #4A5568;
    --texto-claro: #FFFFFF;
    --texto-muted: #8896A6;

    /* Bordes y sombras */
    --borde-sutil: rgba(0, 0, 0, 0.08);
    --sombra-card: 0 4px 24px rgba(0, 0, 0, 0.06);
    --sombra-card-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
    --sombra-nav: 0 2px 20px rgba(0, 0, 0, 0.08);

    /* Tipografía */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Outfit', system-ui, sans-serif;

    /* Espaciado */
    --section-padding: 100px 0;
    --container-max: 1200px;

    /* Transiciones */
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* === Modo Oscuro === */
[data-theme="dark"] {
    --bg-principal: #0D1117;
    --bg-seccion-alt: #161B22;
    --bg-card: #1C2333;
    --texto-principal: #E6EDF3;
    --texto-secundario: #8B949E;
    --texto-muted: #6E7681;
    --borde-sutil: rgba(255, 255, 255, 0.08);
    --sombra-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --sombra-card-hover: 0 12px 40px rgba(0, 0, 0, 0.5);
    --sombra-nav: 0 2px 20px rgba(0, 0, 0, 0.4);
}

/* === Reset y Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-principal);
    color: var(--texto-principal);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

ul { list-style: none; }

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* === Preloader === */
#preloader {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--azul-primario);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
}

.preloader-content img {
    width: 120px;
    margin: 0 auto 20px;
    animation: pulse-logo 1.5s ease-in-out infinite;
}

.preloader-bar {
    width: 200px;
    height: 3px;
    background: rgba(255,255,255,0.15);
    border-radius: 4px;
    overflow: hidden;
    margin: 0 auto;
}

.preloader-bar::after {
    content: '';
    display: block;
    width: 40%;
    height: 100%;
    background: var(--dorado);
    border-radius: 4px;
    animation: loading-bar 1.2s ease-in-out infinite;
}

@keyframes pulse-logo {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
}

@keyframes loading-bar {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}

/* === Navegación === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 12px 0;
    transition: var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    background: var(--bg-principal);
    box-shadow: var(--sombra-nav);
    padding: 8px 0;
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo img {
    height: 52px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
    transition: var(--transition-smooth);
}

.nav-brand-text {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--texto-claro);
    letter-spacing: 0.08em;
    transition: var(--transition-smooth);
}

.navbar.scrolled .nav-brand-text {
    color: var(--texto-principal);
}

.navbar.scrolled .nav-logo img {
    height: 44px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--texto-claro);
    padding: 8px 16px;
    border-radius: 8px;
    transition: var(--transition-smooth);
    position: relative;
    letter-spacing: 0.02em;
}

.navbar.scrolled .nav-links a {
    color: var(--texto-principal);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--dorado);
    background: rgba(200, 151, 62, 0.1);
}

.nav-links a.nav-cta {
    background: var(--dorado);
    color: #fff !important;
    font-weight: 600;
    padding: 10px 24px;
    border-radius: 50px;
}

.nav-links a.nav-cta:hover {
    background: var(--dorado-oscuro);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(200, 151, 62, 0.4);
}

/* Toggle tema */
.theme-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    cursor: pointer;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--texto-claro);
    transition: var(--transition-smooth);
    margin-left: 8px;
}

.navbar.scrolled .theme-toggle {
    background: var(--bg-seccion-alt);
    color: var(--texto-principal);
}

.theme-toggle:hover {
    transform: rotate(30deg) scale(1.1);
}

/* Hamburguesa */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
    z-index: 1001;
}

.hamburger span {
    width: 26px;
    height: 2.5px;
    background: var(--texto-claro);
    border-radius: 4px;
    transition: var(--transition-smooth);
}

.navbar.scrolled .hamburger span {
    background: var(--texto-principal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* === HERO === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--azul-primario);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-bg img.hero-logo-bg {
    position: absolute;
    width: auto;
    height: 80%;
    max-height: 500px;
    object-fit: contain;
    opacity: 0.12;
    animation: hero-logo-slide 12s ease-in-out infinite;
    filter: brightness(1.5) grayscale(0.3);
}

@keyframes hero-logo-slide {
    0% { transform: translateX(-30%) scale(1.1); opacity: 0.08; }
    25% { transform: translateX(0%) scale(1.15); opacity: 0.14; }
    50% { transform: translateX(30%) scale(1.1); opacity: 0.08; }
    75% { transform: translateX(0%) scale(1.15); opacity: 0.14; }
    100% { transform: translateX(-30%) scale(1.1); opacity: 0.08; }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(15, 25, 40, 0.9) 0%,
        rgba(27, 58, 92, 0.75) 50%,
        rgba(42, 95, 143, 0.6) 100%
    );
    z-index: 1;
}

/* Partículas decorativas hero */
.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 2;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--dorado);
    border-radius: 50%;
    opacity: 0;
    animation: float-particle 8s ease-in-out infinite;
}

.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; }
.particle:nth-child(2) { left: 25%; top: 60%; animation-delay: 1.5s; }
.particle:nth-child(3) { left: 45%; top: 30%; animation-delay: 3s; }
.particle:nth-child(4) { left: 65%; top: 70%; animation-delay: 4.5s; }
.particle:nth-child(5) { left: 80%; top: 40%; animation-delay: 6s; }
.particle:nth-child(6) { left: 90%; top: 80%; animation-delay: 2s; }
.particle:nth-child(7) { left: 15%; top: 85%; animation-delay: 3.5s; }
.particle:nth-child(8) { left: 55%; top: 15%; animation-delay: 5s; }

@keyframes float-particle {
    0% { opacity: 0; transform: translateY(0) scale(0); }
    20% { opacity: 0.6; transform: translateY(-30px) scale(1); }
    80% { opacity: 0.3; transform: translateY(-120px) scale(0.6); }
    100% { opacity: 0; transform: translateY(-180px) scale(0); }
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 0 24px;
    max-width: 850px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(200, 151, 62, 0.15);
    border: 1px solid rgba(200, 151, 62, 0.3);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--dorado-claro);
    margin-bottom: 28px;
    backdrop-filter: blur(4px);
    animation: fadeInDown 0.8s ease both;
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 5.5vw, 4.2rem);
    font-weight: 800;
    color: var(--texto-claro);
    line-height: 1.15;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero h1 span {
    color: var(--dorado);
    display: inline-block;
    position: relative;
}

.hero h1 span::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--dorado);
    opacity: 0.3;
    border-radius: 2px;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 36px;
    font-weight: 300;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: var(--dorado);
    color: #fff;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    letter-spacing: 0.02em;
}

.btn-primary:hover {
    background: var(--dorado-oscuro);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(200, 151, 62, 0.45);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: transparent;
    color: var(--texto-claro);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-secondary:hover {
    border-color: var(--dorado);
    color: var(--dorado);
    background: rgba(200, 151, 62, 0.08);
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    margin-top: 60px;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.hero-stat {
    text-align: center;
}

.hero-stat .number {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--dorado);
    display: block;
}

.hero-stat .label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 400;
    margin-top: 4px;
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: fadeInUp 1s ease 1s both;
}

.scroll-indicator span {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.4);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 12px;
    position: relative;
}

.scroll-mouse::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 8px;
    background: var(--dorado);
    border-radius: 2px;
    animation: scroll-dot 2s ease-in-out infinite;
}

@keyframes scroll-dot {
    0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0.3; transform: translateX(-50%) translateY(12px); }
}

/* === Títulos de Sección === */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--dorado);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 16px;
}

.section-tag::before,
.section-tag::after {
    content: '';
    width: 30px;
    height: 2px;
    background: var(--dorado);
    opacity: 0.4;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--texto-principal);
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--texto-secundario);
    max-width: 600px;
    margin: 0 auto;
    font-weight: 300;
}

/* === SOBRE NOSOTROS === */
.about {
    padding: var(--section-padding);
    background: var(--bg-principal);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-image-wrapper {
    position: relative;
}

.about-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--sombra-card-hover);
    position: relative;
}

.about-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.about-image:hover img {
    transform: scale(1.03);
}

.about-accent {
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 160px;
    height: 160px;
    border: 3px solid var(--dorado);
    border-radius: 16px;
    z-index: -1;
    opacity: 0.3;
}

.about-experience-badge {
    position: absolute;
    top: 24px;
    left: -16px;
    background: var(--dorado);
    color: #fff;
    padding: 16px 24px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 24px rgba(200, 151, 62, 0.4);
    z-index: 2;
}

.about-experience-badge .big-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    display: block;
    line-height: 1;
}

.about-experience-badge .badge-text {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.about-content h3 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--texto-principal);
}

.about-content .highlight-text {
    color: var(--dorado);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 20px;
    display: block;
}

.about-content p {
    color: var(--texto-secundario);
    margin-bottom: 24px;
    font-size: 0.98rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 28px;
}

.about-feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-seccion-alt);
    border-radius: 10px;
    transition: var(--transition-smooth);
}

.about-feature-item:hover {
    transform: translateX(4px);
    box-shadow: var(--sombra-card);
}

.about-feature-item i {
    color: var(--dorado);
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.about-feature-item span {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--texto-principal);
}

/* === SERVICIOS === */
.services {
    padding: var(--section-padding);
    background: var(--bg-seccion-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 36px 28px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
    border: 1px solid var(--borde-sutil);
    cursor: default;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--azul-primario), var(--dorado));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--sombra-card-hover);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--azul-primario), var(--azul-medio));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: var(--transition-smooth);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--dorado), var(--dorado-oscuro));
    transform: scale(1.08) rotate(-3deg);
}

.service-icon i {
    font-size: 1.5rem;
    color: #fff;
}

.service-card h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--texto-principal);
}

.service-card p {
    font-size: 0.9rem;
    color: var(--texto-secundario);
    line-height: 1.65;
}

.service-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--texto-principal);
    opacity: 0.04;
    line-height: 1;
}

/* === GALERÍA === */
.gallery {
    padding: var(--section-padding);
    background: var(--bg-principal);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: auto auto;
    gap: 16px;
}

.gallery-item {
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    min-height: 240px;
}

.gallery-item:hover img {
    transform: scale(1.08);
}

.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15,25,40,0.7) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.gallery-item:hover::after {
    opacity: 1;
}

.gallery-item .gallery-caption {
    position: absolute;
    bottom: 16px;
    left: 16px;
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    z-index: 2;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition-smooth);
}

.gallery-item:hover .gallery-caption {
    opacity: 1;
    transform: translateY(0);
}

/* Galería items grandes */
.gallery-item:nth-child(1) {
    grid-column: span 2;
    grid-row: span 2;
}

.gallery-item:nth-child(1) img {
    min-height: 496px;
}

/* === CONTACTO === */
.contact {
    padding: var(--section-padding);
    background: var(--bg-seccion-alt);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    padding: 40px;
    background: linear-gradient(135deg, var(--azul-primario), var(--azul-medio));
    border-radius: 20px;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.contact-info::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(200,151,62,0.1) 0%, transparent 70%);
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.contact-info > p {
    opacity: 0.8;
    margin-bottom: 32px;
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

.contact-detail .icon-circle {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: rgba(255,255,255,0.12);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.contact-detail .detail-text strong {
    display: block;
    font-weight: 600;
    margin-bottom: 2px;
    font-size: 0.95rem;
}

.contact-detail .detail-text span,
.contact-detail .detail-text a {
    font-size: 0.9rem;
    opacity: 0.8;
    color: #fff;
}

.contact-detail .detail-text a:hover {
    color: var(--dorado-claro);
}

.contact-social {
    display: flex;
    gap: 12px;
    margin-top: 32px;
    position: relative;
    z-index: 1;
}

.contact-social a {
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
}

.contact-social a:hover {
    background: var(--dorado);
    transform: translateY(-3px);
}

/* Formulario */
.contact-form-wrapper {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--sombra-card);
    border: 1px solid var(--borde-sutil);
}

.contact-form-wrapper h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--texto-principal);
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--texto-principal);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-seccion-alt);
    border: 2px solid transparent;
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--texto-principal);
    transition: var(--transition-smooth);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--dorado);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(200, 151, 62, 0.1);
}

.form-group input.error,
.form-group textarea.error {
    border-color: #E74C3C;
}

.form-group .error-msg {
    display: none;
    color: #E74C3C;
    font-size: 0.78rem;
    margin-top: 6px;
    font-weight: 500;
}

.form-group input.error ~ .error-msg,
.form-group textarea.error ~ .error-msg {
    display: block;
}

.form-group textarea {
    min-height: 130px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.btn-submit {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--dorado), var(--dorado-oscuro));
    color: #fff;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(200, 151, 62, 0.4);
}

.form-success {
    display: none;
    text-align: center;
    padding: 24px;
    background: rgba(39, 174, 96, 0.08);
    border: 1px solid rgba(39, 174, 96, 0.2);
    border-radius: 12px;
    margin-top: 16px;
    color: #27AE60;
    font-weight: 500;
}

.form-success.show {
    display: block;
    animation: fadeInUp 0.5s ease;
}

/* === FOOTER === */
.footer {
    background: var(--bg-footer);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand img {
    height: 48px;
    margin-bottom: 16px;
    filter: brightness(1.2);
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
    transition: var(--transition-smooth);
}

.footer-social a:hover {
    background: var(--dorado);
    border-color: var(--dorado);
    color: #fff;
    transform: translateY(-3px);
}

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--dorado);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 0.9rem;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-col ul li a:hover {
    color: var(--dorado);
    transform: translateX(4px);
}

.footer-col ul li a i {
    font-size: 0.7rem;
    opacity: 0.5;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
    font-size: 0.88rem;
}

.footer-contact-item i {
    color: var(--dorado);
    margin-top: 3px;
    width: 16px;
    text-align: center;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.83rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: var(--dorado);
}

/* === Botón WhatsApp === */
.whatsapp-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 999;
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.7rem;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: var(--transition-smooth);
    animation: whatsapp-pulse 2s ease-in-out infinite;
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.6);
}

@keyframes whatsapp-pulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4); }
    50% { box-shadow: 0 4px 30px rgba(37, 211, 102, 0.6), 0 0 0 10px rgba(37, 211, 102, 0.1); }
}

/* === Botón Volver Arriba === */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 100px;
    z-index: 998;
    width: 48px;
    height: 48px;
    background: var(--azul-primario);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--dorado);
    transform: translateY(-3px);
}

/* === Animaciones de Scroll (Reveal) === */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

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

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === LIGHTBOX === */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 90%;
    max-height: 85vh;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.4s ease;
}

.lightbox.active img {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 24px;
    right: 32px;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    background: none;
    border: none;
    transition: var(--transition-smooth);
}

.lightbox-close:hover {
    color: var(--dorado);
    transform: rotate(90deg);
}

/* ==============================
   RESPONSIVE
   ============================== */

@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .gallery-item:nth-child(1) {
        grid-column: span 2;
        grid-row: span 1;
    }

    .gallery-item:nth-child(1) img {
        min-height: 280px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 70px 0;
    }

    /* Menú mobile */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 360px;
        height: 100vh;
        background: var(--bg-principal);
        flex-direction: column;
        justify-content: center;
        gap: 8px;
        padding: 24px;
        transition: right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        box-shadow: -4px 0 30px rgba(0, 0, 0, 0.15);
    }

    [data-theme="dark"] .nav-links {
        background: var(--bg-card);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        color: var(--texto-principal) !important;
        font-size: 1.1rem;
        padding: 14px 20px;
        width: 100%;
        text-align: center;
        border-radius: 10px;
    }

    .nav-links a:hover,
    .nav-links a.active {
        background: var(--bg-seccion-alt);
    }

    .hamburger {
        display: flex;
    }

    .nav-brand-text {
        display: none;
    }

    .mobile-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-smooth);
    }

    .mobile-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* Hero mobile */
    .hero-stats {
        gap: 24px;
    }

    .hero-stat .number {
        font-size: 1.6rem;
    }

    /* About mobile */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image img {
        height: 300px;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    /* Services mobile */
    .services-grid {
        grid-template-columns: 1fr;
    }

    /* Gallery mobile */
    .gallery-grid {
        grid-template-columns: 1fr 1fr;
    }

    .gallery-item:nth-child(1) {
        grid-column: span 2;
    }

    .gallery-item img {
        min-height: 180px;
    }

    .gallery-item:nth-child(1) img {
        min-height: 220px;
    }

    /* Contact mobile */
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    /* Footer mobile */
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .back-to-top {
        right: 20px;
        bottom: 100px;
    }

    .whatsapp-btn {
        bottom: 20px;
        right: 20px;
        width: 54px;
        height: 54px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.9rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

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

    .gallery-item:nth-child(1) {
        grid-column: span 1;
    }

    .contact-form-wrapper,
    .contact-info {
        padding: 28px;
    }
}