/* --- PALETA ELEGANTE ESCALA DE GRISES Y NEGROS INDUSTRIALES (Punto 10) --- */
:root {
    --negro-puro: #111111;
    --carbon-oscuro: #1a1a1a;
    --carbon-medio: #262626;
    --gris-borde: #404040;
    --gris-industrial: #666666;
    --gris-suave: #aeaeae;
    --gris-fondo: #f5f5f5;
    --blanco: #ffffff;
    --blanco-transparente: rgba(255, 255, 255, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: #333333;
    line-height: 1.6;
    background-color: var(--blanco);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 25px;
}

/* --- WHATSAPP FLOATING BUTTON (Punto 3) --- */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 32px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    z-index: 10000;
    transition: transform 0.3s ease, background-color 0.3s;
    text-decoration: none;
}
.whatsapp-float:hover {
    transform: scale(1.1);
    background-color: #20ba5a;
}

/* --- NAV BAR Y IDIOMAS (Punto 5) --- */
header {
    background-color: var(--blanco);
    border-bottom: 1px solid #e5e5e5;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
}
.nav-container {
    display: flex;
    align-items: center;
    gap: 20px;
}
.logo-img { max-height: 55px; width: auto; }
.nav-links { display: flex; align-items: center; list-style: none; gap: 20px; }
.nav-links a:not(.btn-portal) {
    text-decoration: none;
    color: var(--carbon-oscuro);
    font-weight: 600;
    font-size: 0.95rem;
}
.btn-portal {
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 2px;
    font-size: 0.85rem;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}
.btn-clientes { border: 1px solid var(--negro-puro); color: var(--negro-puro); }
.btn-clientes:hover { background-color: var(--negro-puro); color: var(--blanco); }
.btn-proveedores { border: 1px solid var(--gris-industrial); color: var(--carbon-medio); }
.btn-proveedores:hover { background-color: var(--gris-industrial); color: var(--blanco); }

/* Selector de idioma Desplegable (Punto 5) */
.lang-selector {
    display: flex;
    align-items: center;
    gap: 4px;
    border-left: 1px solid #ccc;
    padding-left: 15px;
}
.lang-selector i { color: var(--gris-industrial); font-size: 0.9rem; }
.lang-selector select {
    border: none;
    background: transparent;
    font-weight: bold;
    cursor: pointer;
    font-size: 0.85rem;
    outline: none;
}

/* --- HERO SECTION Y CARRUSEL --- */
.hero-section {
    background-color: var(--carbon-oscuro);
    color: var(--blanco);
    padding: 50px 0 70px 0;
}
.hero-text h1 { font-size: 2.5rem; font-weight: 800; text-transform: uppercase; letter-spacing: -0.5px; margin-bottom: 15px; text-align: center; }
.hero-text p { font-size: 1.1rem; color: #bbbbbb; text-align: center; max-width: 800px; margin: 0 auto 35px; }
.carousel-container {
    width: 100%; height: 420px;
    background-size: cover; background-position: center;
    position: relative; display: flex; justify-content: space-between; align-items: center; padding: 0 20px;
    transition: background-image 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    border: 4px solid var(--gris-borde);
}
.carousel-overlay {
    position: absolute; bottom: 0; left: 0; width: 100%; padding: 25px;
    background: linear-gradient(0deg, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0) 100%);
    text-align: left;
}
.carousel-nav { font-size: 2.2rem; color: rgba(255,255,255,0.4); cursor: pointer; z-index: 10; transition: color 0.3s; }
.carousel-nav:hover { color: var(--blanco); }

/* --- ABOUT US SECTION (Punto 8) --- */
.about-section { padding: 80px 0; background-color: var(--blanco); }
.about-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 50px; align-items: start; }
.sub-title { font-weight: bold; text-transform: uppercase; color: var(--gris-industrial); letter-spacing: 2px; font-size: 0.85rem; display: block; margin-bottom: 5px; }
.about-text-block h2 { font-size: 2.2rem; color: var(--negro-puro); margin-bottom: 20px; font-weight: 700; }
.about-text-block p { color: #555; font-size: 1.05rem; margin-bottom: 30px; text-align: justify; }
.about-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; }
.highlight-item i { font-size: 1.5rem; color: var(--negro-puro); margin-bottom: 10px; }
.highlight-item h4 { font-size: 1.1rem; margin-bottom: 5px; color: var(--carbon-oscuro); }
.highlight-item p { font-size: 0.9rem; color: #666; }
.about-mv-block { display: flex; flex-direction: column; gap: 20px; }
.mv-card { background-color: var(--gris-fondo); padding: 30px; border-left: 4px solid var(--negro-puro); }
.mv-card h4 { font-size: 1.2rem; text-transform: uppercase; margin-bottom: 10px; color: var(--negro-puro); display: flex; align-items: center; gap: 10px; }
.mv-card p { font-size: 0.95rem; color: #444; text-align: justify; }

/* --- SERVICES MATRICIALES E ILUSTRATIVOS (Puntos 1, 7 y 9) --- */
.services-section { padding: 80px 0; background-color: var(--gris-fondo); }
.section-title { text-align: center; margin-bottom: 5px; }
.section-title h2 { font-size: 2.2rem; color: var(--negro-puro); text-transform: uppercase; font-weight: 800; margin-bottom: 15px; }
.section-title p { color: var(--gris-industrial); max-width: 600px; margin: 0 auto 50px; }

.services-grid-main { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; margin-bottom: 30px; }

/* REEMPLAZO DE ICONOS POR FONDOS IMPRESIÓN LOGÍSTICA (Punto 9) */
.service-card.featured {
    position: relative; height: 380px; overflow: hidden; display: flex; align-items: flex-end;
    border: 1px solid #ddd; transition: transform 0.3s ease;
}
.service-card.featured:hover { transform: translateY(-5px); }

/* Fondos ilustrativos simulados (reemplazables por tus fotos de proyectos) */
.project-cargo-bg { background: url('https://images.unsplash.com/photo-1578575437130-527eed3abbec?q=80&w=600') center/cover; }
.chartering-bg { background: url('https://images.unsplash.com/photo-1506012787146-f92b2d7d6d96?q=80&w=600') center/cover; }
.raw-materials-bg { background: url('https://images.unsplash.com/photo-1605559424843-9e4c228bf1c2?q=80&w=600') center/cover; }

.card-dark-filter { position: absolute; top:0; left:0; width:100%; height:100%; background: linear-gradient(180deg, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.95) 85%); z-index: 1; }
.card-content { position: relative; z-index: 2; padding: 25px; color: var(--blanco); }

/* Contenedores Hexagonales en CSS Inspirados en la presentación (Punto 9) */
.hex-icon-container {
    width: 50px; height: 50px; background-color: var(--blanco-transparente);
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
    display: flex; justify-content: center; align-items: center; font-size: 1.3rem; color: var(--blanco); margin-bottom: 15px;
    border: 1px solid rgba(255,255,255,0.4);
}
.service-card h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 2px; }
.service-focus { font-size: 0.8rem; font-weight: bold; text-transform: uppercase; color: var(--gris-suave); letter-spacing: 1px; margin-bottom: 10px; }
.card-content p:not(.service-focus) { font-size: 0.9rem; color: #ccc; }

/* INTEGRACIÓN FREIGHT FORWARDING (Punto 1) */
.forwarding-box { background-color: var(--carbon-oscuro); color: var(--blanco); padding: 40px; border: 1px solid var(--gris-borde); }
.forwarding-header { display: flex; gap: 20px; align-items: flex-start; margin-bottom: 30px; border-bottom: 1px solid var(--gris-borde); padding-bottom: 25px; }
.sub-hex { background-color: var(--blanco); color: var(--negro-puro); width: 60px; height: 60px; font-size: 1.6rem; }

.modalities-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.modality-item h5 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; color: var(--blanco); }
.modality-item h5 i { color: var(--gris-suave); }
.modality-item p { font-size: 0.88rem; color: #b3b3b3; }

/* --- SECCIÓN CONTACTO, FORMULARIO Y MAPA (Puntos 2 y 4) --- */
.contact-section { padding: 80px 0; background-color: var(--blanco); }
.contact-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; }

.contact-form-container h3 { font-size: 1.8rem; font-weight: 800; text-transform: uppercase; margin-bottom: 10px; }
.contact-form-container p { color: #666; margin-bottom: 25px; font-size: 0.95rem; }

.zt-form { display: flex; flex-direction: column; gap: 15px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.zt-form label { font-size: 0.85rem; font-weight: bold; color: var(--carbon-oscuro); text-transform: uppercase; }
.zt-form input, .zt-form textarea {
    padding: 12px; border: 1px solid #ccc; background-color: #fafafa;
    font-size: 0.95rem; font-family: inherit; transition: border-color 0.2s;
}
.zt-form input:focus, .zt-form textarea:focus { border-color: var(--negro-puro); outline: none; background-color: #fff; }
.btn-submit {
    background-color: var(--negro-puro); color: var(--blanco); border: none; padding: 14px;
    font-weight: bold; text-transform: uppercase; letter-spacing: 1px; cursor: pointer;
    display: inline-flex; justify-content: center; align-items: center; gap: 10px; transition: background-color 0.2s;
}
.btn-submit:hover { background-color: var(--carbon-medio); }

/* Integración del Mapa e info (Punto 4) */
.contact-map-info { display: flex; flex-direction: column; gap: 20px; }
.map-wrapper { width: 100%; height: 320px; border: 4px solid var(--gris-fondo); }
.quick-contact-card { background-color: var(--carbon-medio); color: var(--blanco); padding: 25px; }
.quick-contact-card h5 { font-size: 1.1rem; text-transform: uppercase; margin-bottom: 12px; letter-spacing: 1px; }
.quick-contact-card p { font-size: 0.95rem; margin-bottom: 8px; color: #ddd; display: flex; align-items: center; gap: 10px; }
.quick-contact-card p i { color: var(--gris-suave); }

/* --- CORPOREIDAD DEL PIE DE PÁGINA (Punto 6) --- */
footer { background-color: var(--negro-puro); color: var(--blanco); padding: 60px 0 20px 0; border-top: 3px solid var(--gris-borde); }
.footer-content { display: grid; grid-template-columns: 1.2fr 0.8fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-logo { max-height: 50px; width: auto; margin-bottom: 15px; filter: brightness(0) invert(1); }
.footer-brand p { font-size: 0.9rem; color: #999; max-width: 320px; }
.footer-links-block h4, .footer-info-block h4 { font-size: 1.1rem; text-transform: uppercase; margin-bottom: 20px; letter-spacing: 1px; color: var(--blanco); }
.footer-links-block ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links-block a { color: #999; text-decoration: none; font-size: 0.9rem; transition: color 0.2s; }
.footer-links-block a:hover { color: var(--blanco); }
.footer-info-block p { font-size: 0.9rem; color: #999; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.footer-info-block p i { color: var(--gris-suave); }

.footer-bottom { border-top: 1px solid var(--gris-borde); padding-top: 20px; text-align: center; }
.footer-bottom p { font-size: 0.8rem; color: #666; }

/* --- RESPONSIVIDAD TOTAL --- */
@media (max-width: 992px) {
    .about-grid, .contact-grid, .footer-content { grid-template-columns: 1fr; gap: 30px; }
    .services-grid-main { grid-template-columns: repeat(2, 1fr); }
    .modalities-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 15px; }
    .nav-container { flex-direction: column; width: 100%; gap: 15px; }
    .nav-links { flex-direction: column; gap: 12px; }
    .services-grid-main { grid-template-columns: 1fr; }
    .modalities-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; gap: 15px; }
    .forwarding-header { flex-direction: column; align-items: center; text-align: center; }
    .hero-text h1 { font-size: 1.9rem; }
    .carousel-container { height: 280px; }
}