/* --- Variables de Color (Azul Tecnológico Corporativo) --- */
:root {
    --main-blue: #003366;    /* Azul Marino Profundo (Corporativo) */
    --accent-blue: #007bff;  /* Azul Eléctrico (Tecnología/Acento) */
    --bg-light: #f4f7f9;    /* Gris muy claro para fondos alternos */
    --text-dark: #1a2a3a;   /* Gris casi negro para texto principal */
    --text-white: #ffffff;
}

/* --- Resets Basicos y Tipografía Robustecida --- */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Open Sans', sans-serif; line-height: 1.8; color: var(--text-dark); background-color: #ffffff; }

/* Títulos con mucho "cuerpo" (Montserrat Bold) */
h1, h2, h3 { font-family: 'Montserrat', sans-serif; font-weight: 800; color: var(--main-blue); text-transform: uppercase; letter-spacing: -1px; }
h1 { font-size: 3.8rem; margin-bottom: 20px; color: var(--text-white); } /* Título muy grande */
h2 { font-size: 2.8rem; text-align: center; margin-bottom: 60px; position: relative; padding-bottom: 15px; }
h2::after { content: ''; display: block; width: 80px; height: 5px; background: var(--accent-blue); margin: 10px auto 0; border-radius: 2px; }
h3 { font-size: 1.6rem; margin-bottom: 15px; color: var(--main-blue); }

/* --- Navegación Fija y Profesional --- */
.navbar { background: var(--text-white); padding: 25px 10%; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 1000; box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
.logo { font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 1.9rem; color: var(--main-blue); letter-spacing: -1.5px; }
.logo span { color: var(--accent-blue); }
.nav-links { display: flex; list-style: none; gap: 30px; }
.nav-links a { text-decoration: none; color: var(--text-dark); font-weight: 600; font-size: 1.1rem; transition: color 0.3s; }
.nav-links a:hover { color: var(--accent-blue); }

/* --- Estilos del Hero Slider (Rotativo) --- */
.hero-slider { position: relative; height: 75vh; width: 100%; overflow: hidden; }
.slide { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-size: cover; background-position: center; display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity 1s ease-in-out; z-index: 1; }
.slide.active { opacity: 1; z-index: 2; }
.hero-content { max-width: 900px; text-align: center; color: var(--text-white); padding: 0 20px; z-index: 3; }
.hero-content p { font-size: 1.6rem; font-weight: 300; margin-top: 15px; opacity: 0.9; }

/* --- Secciones y Contenedores --- */
section { padding: 100px 10%; }
.section-alt { background-color: var(--bg-light); }

/* Tecnología (Flexbox) */
.container-flex { display: flex; align-items: center; gap: 60px; flex-wrap: wrap; }
.container-flex img { width: 45%; max-width: 550px; border-radius: 15px; box-shadow: 0 15px 35px rgba(0,0,0,0.2); }
.text-content { flex: 1; min-width: 300px; }
.text-content p { font-size: 1.15rem; color: #555; margin-bottom: 20px; }

/* --- Cobertura y Tarifas (Grid y Cards Robustas) --- */
.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 40px; }
.card { background: var(--text-white); padding: 50px; border-radius: 20px; box-shadow: 0 20px 50px rgba(0,0,0,0.1); text-align: center; border-bottom: 6px solid transparent; transition: transform 0.3s, border-color 0.3s; }
.card:hover { transform: translateY(-10px); border-color: var(--accent-blue); }
.card h3 { font-size: 1.9rem; margin-bottom: 25px; color: var(--main-blue); }
.price-list p { font-size: 1.25rem; margin-bottom: 15px; padding-bottom: 10px; border-bottom: 1px solid #eee; color: #444; }
.price-list p span { font-weight: 700; color: var(--accent-blue); margin-right: 10px; }
.card.highlight { border-color: var(--accent-blue); background-color: #fffdec; /* Un ligero toque destacado */ }

/* Ventajas (Estilo minimalista pero robusto) */
.grid-container.advantages { gap: 30px; }
.ventaja-item { background: var(--text-white); padding: 40px; border-radius: 15px; box-shadow: 0 10px 25px rgba(0,0,0,0.05); text-align: center; border-top: 5px solid var(--accent-blue); }
.ventaja-item h3 { font-size: 1.5rem; color: var(--main-blue); margin-bottom: 15px; }
.ventaja-item p { font-size: 1.1rem; color: #666; }

/* --- Sección de Contacto con Imagen de Fondo (Premium) --- */
.contact-section { position: relative; background-image: url('https://images.pexels.com/photos/3184311/pexels-photo-3184311.jpeg?auto=compress&cs=tinysrgb&w=1600'); /* Imagen de equipo/tecnología */ background-size: cover; background-position: center; background-attachment: fixed; /* Efecto Parallax */ padding: 120px 10%; color: var(--text-white); display: flex; justify-content: center; align-items: center; }
.contact-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 26, 51, 0.85); /* Capa azul oscuro translúcida */ z-index: 1; }
.form-container { position: relative; z-index: 2; width: 100%; max-width: 650px; background: rgba(255,255,255,0.95); /* Fondo blanco translúcido */ padding: 60px; border-radius: 20px; box-shadow: 0 25px 60px rgba(0,0,0,0.3); color: var(--text-dark); text-align: center; }
.form-container h2 { color: var(--main-blue); font-size: 2.6rem; margin-bottom: 15px; }
.form-container h2::after { background: var(--main-blue); }
.form-container p { font-size: 1.2rem; color: #555; margin-bottom: 40px; }

/* Formulario con Estilo Robusto */
form { display: flex; flex-direction: column; gap: 20px; text-align: left; }
input, textarea { width: 100%; padding: 20px; border: 2px solid #ddd; border-radius: 10px; font-size: 1.1rem; font-family: 'Open Sans', sans-serif; transition: border-color 0.3s; }
input:focus, textarea:focus { border-color: var(--accent-blue); outline: none; }
textarea { height: 150px; resize: none; }
.btn { width: 100%; padding: 22px; background: var(--main-blue); color: var(--text-white); border: none; border-radius: 10px; font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 1.2rem; text-transform: uppercase; cursor: pointer; transition: background 0.3s, transform 0.2s; box-shadow: 0 5px 15px rgba(0,51,102,0.3); }
.btn:hover { background: var(--accent-blue); transform: translateY(-3px); }

.direct-contact { margin-top: 40px; padding-top: 20px; border-top: 1px solid #eee; }
.direct-contact p { font-size: 1rem; color: #777; margin-bottom: 5px; }
.direct-contact a { font-size: 1.3rem; color: var(--main-blue); font-weight: 700; text-decoration: none; }
.direct-contact a:hover { color: var(--accent-blue); }

/* --- Footer --- */
footer { background: #001a33; color: rgba(255,255,255,0.7); padding: 40px 10%; text-align: center; font-size: 1rem; }

/* --- Media Queries (Responsividad) --- */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.4rem; }
    .container-flex { flex-direction: column; text-align: center; }
    .container-flex img { width: 80%; }
}
@media (max-width: 768px) {
    .navbar { padding: 20px 5%; flex-direction: column; gap: 10px; }
    .nav-links { gap: 15px; font-size: 0.9rem; flex-wrap: wrap; justify-content: center; }
    h1 { font-size: 2.2rem; }
    section { padding: 60px 5%; }
    .form-container { padding: 40px 20px; }
}