/* VARIABLES GLOBALES Y PALETA */
:root {
    --azul-corporativo: #2C3E50;
    --amarillo-solar: #F39C12;
    --texto-oscuro: #1A252F;
    --gris-fondo: #FFFFFF;
    --gris-alternativo: #F8F9FA;
    --lineas: #E2E8F0;
    --max-ancho: 1200px;
}

/* CONFIGURACIÓN BÁSICA RESET */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--texto-oscuro);
    background-color: var(--gris-fondo);
    line-height: 1.6;
}

/* CABECERA (HEADER) */
header {
    background-color: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--lineas);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 5%;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 55px;
    width: auto;
    object-fit: contain;
}

nav a {
    color: var(--azul-corporativo);
    text-decoration: none;
    font-weight: 600;
    margin: 0 15px;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--amarillo-solar);
}

/* BOTONES */
.btn-cta {
    background-color: var(--amarillo-solar);
    color: white;
    padding: 12px 26px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    display: inline-block;
    transition: background-color 0.3s, transform 0.2s;
}

.btn-cta:hover {
    background-color: #D3840B;
    transform: translateY(-1px);
}

/* SECCIÓN HÉROE MODIFICADA CON IMAGEN DE FONDO REAL */
.hero {
    position: relative;
    background: linear-gradient(rgba(44, 62, 80, 0.4), rgba(26, 37, 47, 0.85)), url('assets/hero-installer.png') no-repeat center center/cover;
    color: white;
    padding: 160px 5% 140px;
    text-align: center;
}

.hero-content {
    max-width: 850px;
    margin: 0 auto;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero h1 {
    font-size: 3.2rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.4rem;
    margin-bottom: 35px;
    opacity: 0.95;
}

/* SECCIONES COMUNES */
.section {
    padding: 90px 5%;
}

.bg-alt {
    background-color: var(--gris-alternativo);
}

.container {
    max-width: var(--max-ancho);
    margin: 0 auto;
}

.section h2 {
    font-size: 2.4rem;
    text-align: center;
    color: var(--azul-corporativo);
    margin-bottom: 10px;
}

.divider {
    width: 60px;
    height: 4px;
    background-color: var(--amarillo-solar);
    margin: 0 auto 50px;
    border-radius: 2px;
}

.divider-left {
    width: 50px;
    height: 4px;
    background-color: var(--amarillo-solar);
    margin: 15px 0 25px 0;
    border-radius: 2px;
}

.text-highlight {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--azul-corporativo);
    margin-bottom: 20px;
}

.text-center-max {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.15rem;
}

/* DISEÑO PARTIDO (SPLIT LAYOUT) */
.layout-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

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

.rounded-shadow {
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* NUEVA REJILLA DE TARJETAS VISUALES CON IMÁGENES */
.grid-visual {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 35px;
}

.card-visual {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.card-visual:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.1);
}

.card-visual-img {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background-color: #eee;
}

.card-visual-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

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

.card-visual-body {
    padding: 25px;
    flex-grow: 1;
}

.card-visual-body h3 {
    margin-bottom: 12px;
    color: var(--azul-corporativo);
    font-size: 1.4rem;
}

.card-visual-body p {
    color: #555;
    font-size: 0.98rem;
}

/* MAQUETACIÓN DE CONTACTO */
.contacto-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contacto-info h3 {
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: var(--azul-corporativo);
}

.info-item {
    margin-bottom: 15px;
    font-size: 1.05rem;
}

/* FORMULARIO */
.contacto-form form {
    background: white;
    padding: 35px;
    border-radius: 6px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #CBD5E1;
    border-radius: 4px;
    font-size: 1rem;
    color: var(--texto-oscuro);
    outline: none;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--azul-corporativo);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-group input {
    width: auto;
}

.btn-submit {
    width: 100%;
    background-color: var(--azul-corporativo);
    color: white;
    padding: 14px;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-submit:hover {
    background-color: var(--texto-oscuro);
}

/* PIE DE PÁGINA (FOOTER) */
footer {
    background-color: var(--azul-corporativo);
    color: white;
    padding: 40px 5%;
}

.footer-container {
    max-width: var(--max-ancho);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    margin: 0 10px;
}

.footer-links a:hover {
    color: var(--amarillo-solar);
}

/* RESPONSIVE */
@media (max-width: 992px) {
    .layout-split { grid-template-columns: 1fr; gap: 35px; }
    .hero h1 { font-size: 2.6rem; }
}

@media (max-width: 768px) {
    header { flex-direction: column; gap: 15px; text-align: center; }
    nav { margin-bottom: 10px; }
    .hero h1 { font-size: 2.2rem; }
    .contacto-wrapper { grid-template-columns: 1fr; gap: 40px; }
}