/* --- RESET Y VARIABLES --- */
:root {
    --primary: #003366; 
    --secondary: #ff6600; 
    --dark: #333;
    --light: #f4f4f4;
    --white: #fff;
    --gradient-start: #003366;
    --gradient-end: #ff6600;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', sans-serif; }
body { line-height: 1.6; color: var(--dark); overflow-x: hidden; } /* overflow-x evita scroll horizontal */
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* --- UTILIDADES --- */
.container { max-width: 1100px; margin: auto; padding: 0 20px; }
.section-padding { padding: 80px 0; }
.text-center { text-align: center; }

/* Accesibilidad: ocultar texto solo visualmente pero disponible para lectores de pantalla */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* Botones con transición suave */
.btn {
    display: inline-block;
    background: var(--secondary);
    color: var(--white);
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: bold;
    border: none;
    cursor: pointer;
    transition: all 0.4s ease; /* Suavidad al pasar el mouse */
}
.btn:hover { background: #e65c00; transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,0,0,0.2); }

/* Transiciones globales más suaves para interacciones */
:is(.btn, .nav-link, .service-card, .form-box, .contact-info-item) {
    transition: transform 0.45s cubic-bezier(.2,.9,.2,1), box-shadow 0.35s ease, opacity 0.35s ease;
}

/* --- HEADER --- */
.header { background: var(--white); box-shadow: 0 2px 15px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; }
.header .container { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); }
/* Logo imagen */
.site-logo { height: 46px; display: inline-block; vertical-align: middle; }
.logo-text-fallback { display:none; }

.navbar { display: flex; align-items: center; gap: 14px; }
.navbar a { margin-left: 0; font-weight: 500; position: relative; display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 8px; color: var(--dark); }
/* Efecto de linea debajo del link al pasar mouse */
.navbar a::after {
    content: ''; display: block; width: 0; height: 2px; background: var(--secondary); transition: width .3s;
}
.navbar a:hover::after { width: 100%; }
.menu-btn { display: none; font-size: 1.5rem; cursor: pointer; }

/* Estilo para el enlace Home (icono) */
.home-link i { font-size: 0.95rem; color: var(--primary); }

/* Botón de contacto destacado */
.btn--primary { background: var(--primary); color: var(--white); padding: 10px 18px; border-radius: 8px; }
.btn--primary:hover { background: #002244; transform: translateY(-3px); }

/* Estado activo para el enlace actual */
.active-link { color: var(--secondary); font-weight: 700; background: rgba(255,102,0,0.08); }

/* --- HERO (PORTADA) --- */
.hero {
    height: 90vh; /* Altura casi completa */
    background: linear-gradient(rgba(0,51,102,0.85), rgba(0,51,102,0.7)), url('img/fondo.jpg');
    background-size: cover; background-position: center;
    display: flex; align-items: center; justify-content: center;
    text-align: center; color: var(--white);
}
.hero h1 { font-size: 3.5rem; margin-bottom: 20px; line-height: 1.2; }
.hero p { font-size: 1.3rem; margin-bottom: 30px; max-width: 700px; margin-left: auto; margin-right: auto; }

/* --- TARJETAS DE SERVICIOS --- */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; margin-top: 50px; }
.service-card {
    background: var(--white); padding: 40px 30px; border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05); text-align: center;
    transition: all 0.5s ease; border-bottom: 3px solid transparent;
}
.service-card:hover { transform: translateY(-10px); border-bottom: 3px solid var(--secondary); }
.service-card i { font-size: 3rem; color: var(--secondary); margin-bottom: 20px; }

/* Zona de contacto: cajas legibles con sutil degradado y buen contraste */
.contact-info {
    /* Fondo claro para máxima legibilidad del texto */
    background: var(--white);
    padding: 22px; border-radius: 12px; box-shadow: 0 8px 20px rgba(0,0,0,0.06);
    color: var(--dark);
    border-left: 6px solid var(--secondary);
}
.form-box {
    /* Formulario sobre fondo blanco con sombra para separar visualmente */
    background: #fff;
    color: var(--dark);
    padding: 20px; border-radius: 12px; box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.form-box input, .form-box textarea {
    background: rgba(249,249,249,1); color: var(--dark);
}
.form-box input::placeholder, .form-box textarea::placeholder { color: #7a7a7a; }
.form-box button { border-radius: 8px; }

.contact-info h2, .contact-info h4 { color: var(--primary); }
.contact-info p { color: var(--dark); }

/* Botón de envío en formulario: degradado azul->naranja con texto blanco para contraste */
.form-box .btn {
    background: linear-gradient(90deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: #fff;
    padding: 12px 18px;
    border: none;
}
.form-box .btn:hover { transform: translateY(-3px); filter: brightness(0.95); }

/* --- PAGINA CABECERA (Para las otras paginas) --- */
.page-header {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: var(--white); padding: 60px 0; text-align: center;
}

/* --- FOOTER --- */
.footer { background: #1a1a1a; color: #888; padding: 40px 0; text-align: center; margin-top: auto; }

/* =========================================
   ANIMACIONES (SCROLL REVEAL)
   ========================================= */
/* Estado inicial (oculto) */
.reveal {
    opacity: 0;
    transform: translateY(36px) scale(.995); /* Empujado hacia abajo */
    transition: opacity 0.9s cubic-bezier(.2,.9,.2,1), transform 0.9s cubic-bezier(.2,.9,.2,1);
}

/* Estado activo (visible) - JavaScript agregará esta clase */
.reveal.active {
    opacity: 1;
    transform: translateY(0) scale(1); /* Vuelve a su lugar */
}

/* Animación de entrada para el Hero (siempre visible al cargar) */
.fade-in-down { animation: fadeInDown 1.2s ease; }
@keyframes fadeInDown {
    0% { opacity: 0; transform: translateY(-50px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .menu-btn { display: block; }
    .navbar { position: absolute; top: 80px; left: 0; width: 100%; background: var(--white); flex-direction: column; display: none; padding: 20px; box-shadow: 0 5px 10px rgba(0,0,0,0.1); }
    .navbar.active { display: flex; }
    .navbar a { margin: 10px 0; }
    .hero h1 { font-size: 2.2rem; }

    /* Menú móvil: suavizar entrada/exit */
    .navbar { transform: translateY(-8px); opacity: 0; transition: transform .35s ease, opacity .35s ease; }
    .navbar.active { transform: translateY(0); opacity: 1; }
}