/* ===== MENÚ PRINCIPAL ===== */

.main-nav {
    background: #003666;
    width: 100%;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.30);
    position: sticky;
    top: 0;
    z-index: 999;
}

/* SOLO el primer nivel del menú */
.main-nav > ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    padding: 10px 0;
    margin: 0;
    gap: 10px;
}

.main-nav > ul > li {
    position: relative;      /* necesario para submenús */
    display: inline-block;
}

.main-nav > ul > li > a {
    display: inline-block;
    padding: 10px 22px;
    color: #e6ecf7;
    text-decoration: none;
    border-radius: 999px;
    font-size: 15px;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    position: relative;
    transition: all 0.25s ease-in-out;
}

/* Efecto de encendido (brillo) */
.main-nav > ul > li > a::before {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    opacity: 0;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.6);
    transition: opacity 0.25s ease-in-out;
}

.main-nav > ul > li > a:hover {
    background: linear-gradient(120deg, #0e74ff, #23d5ff);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 0 12px rgba(23, 140, 255, 0.9);
}

.main-nav > ul > li > a:hover::before {
    opacity: 1;
}

/* ===== SUBMENÚ (DROPDOWN DE CONTACTANOS) ===== */

.has-submenu .submenu {
    display: none;              /* oculto por defecto */
    position: absolute;
    top: 110%;                  /* un poquito debajo del botón */
    left: 0;
    background: #003666;
    border-radius: 10px;
    min-width: 260px;
    padding: 8px 0;
    box-shadow: 0 8px 20px rgba(0,0,0,0.35);
    z-index: 1000;
}

.has-submenu .submenu li {
    list-style: none;
    display: block;
    width: 100%;
}

.has-submenu .submenu a {
    display: block;
    padding: 8px 16px;
    font-size: 14px;
    color: #e6ecf7;
    text-decoration: none;
    border-radius: 0;
    border: none;
    letter-spacing: 0.3px;
    white-space: nowrap;
    transition: background 0.2s ease-in-out, padding-left 0.2s ease-in-out;
}

/* Hover en submenú (cascada) */
.has-submenu .submenu a:hover {
    background: rgba(14, 116, 255, 0.8);
    padding-left: 22px;
}

/* Mostrar submenú SOLO cuando el li tiene la clase "open" */
.has-submenu.open .submenu {
    display: block;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 768px) {
    .main-nav > ul {
        gap: 5px;
    }

    .main-nav > ul > li > a {
        padding: 8px 15px;
        font-size: 14px;
    }

    .has-submenu .submenu {
        position: static;
        box-shadow: none;
        border-radius: 0;
        min-width: 100%;
        padding: 5px 0;
        background: #01294a;
        margin-top: 4px;
    }

    .has-submenu .submenu a {
        font-size: 13px;
        padding: 6px 14px;
    }
}