/* ==========================================================================
   VARIABLES DE DISEÑO (Fondo Claro y Moderno)
   ========================================================================== */
:root {
    --bg-principal: #f8fafc;       /* Gris ultra claro, descansa la vista */
    --bg-tarjeta: #ffffff;         /* Blanco puro para destacar elementos */
    --texto-principal: #0f172a;    /* Azul oscuro/negro para máxima legibilidad */
    --texto-mutado: #64748b;       /* Gris medio para descripciones */
    --color-rodev: #0284c7;        /* Azul corporativo vibrante para "RODEV" */
    --color-ia: #7c3aed;           /* Morado moderno e innovador para "IA" */
    --gradiente-rodevia: linear-gradient(135deg, #0284c7 0%, #7c3aed 100%);
    --sombra-suave: 0 10px 30px -10px rgba(0, 0, 0, 0.05);
    --sombra-tarjeta: 0 20px 40px -15px rgba(15, 23, 42, 0.06);
    --borde-sutil: 1px solid #e2e8f0;
}

/* ==========================================================================
   ESTILOS GENERALES
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-principal);
    color: var(--texto-principal);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* ==========================================================================
   NAVBAR / CABECERA (Adaptada para Menú Hamburguesa)
   ========================================================================== */
header {
    background-color: var(--bg-tarjeta);
    border-bottom: var(--borde-sutil);
    position: fixed; /* Mantiene el menú fijo arriba al hacer scroll */
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between; 
    align-items: center;
    padding: 0.9rem 0;
    position: relative; /* Clave para posicionar el despliegue móvil */
}

/* Contenedor del logo para evitar deformaciones */
.logo-container {
    display: flex;
    align-items: center;
}

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

/* Contenedor de enlaces en Escritorio */
.nav-links {
    display: flex;
    list-style: none;
    gap: 1.2rem; 
    align-items: center;
    padding: 0;
    margin: 0;
    margin-left: auto; /* Empuja el menú a la derecha */
}

/* Estilo Base de los Botones Flotantes */
.nav-links a {
    background: var(--gradiente-rodevia);
    color: #ffffff !important;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.7rem 1.8rem;
    border-radius: 50px;
    border: none;
    box-shadow: 0 8px 20px -6px rgba(2, 132, 199, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
}

/* Efecto HOVER Escritorio */
.nav-links a:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 28px -5px rgba(2, 132, 199, 0.5);
    opacity: 0.95;
}

/* Botón Hamburguesa (Oculto en PC) */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    background: transparent;
    border: none;
    gap: 5px;
    padding: 10px;
    z-index: 1010;
}

.menu-toggle .bar {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--gradiente-rodevia); /* Las líneas toman el estilo corporativo */
    border-radius: 3px;
    transition: all 0.3s ease-in-out;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
    padding: 220px 0 120px 0; /* Ajustado el padding superior por el header fixed */
    text-align: center;
    background: radial-gradient(circle at top, rgba(2, 132, 199, 0.05) 0%, transparent 50%);
}

.hero h1 {
    font-size: 3.2rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    color: #0f172a;
}

.hero h1 span {
    background: var(--gradiente-rodevia);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--texto-mutado);
    max-width: 750px;
    margin: 0 auto 2.5rem auto;
    font-weight: 400;
}

.btn {
    display: inline-block;
    background: var(--gradiente-rodevia);
    color: #ffffff;
    padding: 0.9rem 2.2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.3);
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px -5px rgba(2, 132, 199, 0.4);
}

/* ==========================================================================
   SECCIÓN SERVICIOS / SOLUCIONES
   ========================================================================== */
.servicios {
    padding: 100px 0;
    background-color: #ffffff;
}

.seccion-titulo {
    text-align: center;
    font-size: 2.4rem;
    margin-bottom: 4rem;
    font-weight: 800;
    color: #0f172a;
}

.seccion-titulo span {
    background: var(--gradiente-rodevia);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.grid-servicios {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2.5rem;
}

.tarjeta {
    background-color: var(--bg-principal);
    padding: 3rem 2rem;
    border-radius: 20px;
    border: var(--borde-sutil);
    box-shadow: var(--sombra-suave);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tarjeta:hover {
    transform: translateY(-8px);
    background-color: var(--bg-tarjeta);
    border-color: rgba(2, 132, 199, 0.2);
    box-shadow: var(--sombra-tarjeta);
}

.tarjeta-icono {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    background: rgba(2, 132, 199, 0.06);
    padding: 0.5rem 1rem;
    border-radius: 14px;
}

.tarjeta h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    font-weight: 700;
    color: #0f172a;
}

.tarjeta p {
    color: var(--texto-mutado);
    font-size: 0.95rem;
    line-height: 1.6;
}

.tarjeta-link,
.tarjeta-link h3,
.tarjeta-link p,
.tarjeta-link * {
    display: block;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.tarjeta-cta {
    display: inline-block;
    margin-top: 1.2rem;
    font-size: 0.88rem;
    font-weight: 700;
    color: #0284c7;
}

/* ==========================================================================
   FOOTER (PIE DE PÁGINA)
   ========================================================================== */
footer {
    background-color: #0f172a;
    padding: 60px 0 40px 0;
    color: #94a3b8;
}

.footer-contenido {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    text-align: center;
}

.footer-enlaces {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3rem;
    list-style: none;
}

.footer-enlaces a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-enlaces a:hover {
    color: #38bdf8;
}

.copyright {
    font-size: 0.85rem;
    color: #64748b;
    border-top: 1px solid #334155;
    width: 100%;
    padding-top: 20px;
}

/* ==========================================================================
   MEDIA QUERY UNIFICADA (Móviles y Tablets)
   ========================================================================== */
@media (max-width: 768px) {
    /* Redimensionamos el logo para que no ocupe toda la pantalla en móviles */
    .logo-img {
        width: 160px !important;
        height: auto !important;
    }

    /* Mostrar botón hamburguesa */
    .menu-toggle {
        display: flex !important;
    }

    /* Transformar el menú flotante en un panel desplegable vertical pulido */
    .nav-links {
        display: none; 
        flex-direction: column;
        align-items: center;
        position: absolute;
        top: 100%; /* Despliega justo debajo del header blanco */
        left: 0;
        width: 100%;
        background-color: var(--bg-tarjeta); /* Fondo blanco limpio en armonía con tu web */
        padding: 1.5rem 0;
        border-bottom: var(--borde-sutil);
        box-shadow: 0 15px 25px -10px rgba(0, 0, 0, 0.08);
        gap: 1rem;
        margin-left: 0;
    }

    /* Forzar a que los botones estéticos se vean bien apilados en móvil */
    .nav-links li {
        width: 80%;
    }
    
    .nav-links a {
        display: block;
        text-align: center;
        padding: 0.8rem 0;
    }

    /* Clase activa que inyecta JavaScript al hacer clic */
    .nav-links.active {
        display: flex !important;
    }

    /* Animación fluida de las líneas hacia la "X" */
    .menu-toggle.is-active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .menu-toggle.is-active .bar:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.is-active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    /* Ajustes extras del resto de la web en móvil */
    .hero h1 { font-size: 2.3rem; }
    .hero p { font-size: 1.1rem; }
    .footer-enlaces { flex-direction: column; gap: 1.2rem; }
    .seccion-titulo { font-size: 1.9rem; }
}