/* ============================================================
   ENCABEZADO MODERNO - ACA UNAM
   Compatible con Bootstrap 5.0 beta 2 + bootnavbar
   Este archivo SOLO modifica la apariencia.
   ============================================================ */

/* ---------- Barra principal ---------- */

#main_navbar.navbar-institucional {
    position: relative;
    z-index: 1030;
    margin: 0;
    padding: 0;
    border: 0;
    background: linear-gradient(135deg, #0b3554 0%, #104163 48%, #155a82 100%) !important;
    box-shadow: 0 4px 18px rgba(0, 0, 0, .18) !important;
}

/* Línea institucional superior */
#main_navbar.navbar-institucional::before {
    content: "";
    display: block;
    height: 4px;
    background: linear-gradient(90deg, #007b9e, #00a6c7, #007b9e);
}

/* Contenedor de la barra */
#main_navbar .container-fluid {
    min-height: 68px;
    padding: 0 22px !important;
    display: flex;
    align-items: center;
    background: transparent !important;
}

/* ---------- Marca ACA UNAM ---------- */

#main_navbar .navbar-brand {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 54px;
    margin-right: 28px;
    padding: 8px 20px 8px 4px !important;
    color: #fff !important;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: .8px;
    text-decoration: none;
    text-shadow: 0 1px 2px rgba(0,0,0,.25);
    white-space: nowrap;
}

#main_navbar .navbar-brand::after {
    content: "";
    position: absolute;
    right: 0;
    top: 13px;
    bottom: 13px;
    width: 1px;
    background: rgba(255,255,255,.28);
}

/* ---------- Botón móvil ---------- */

#main_navbar .navbar-toggler {
    border: 1px solid rgba(255,255,255,.35) !important;
    border-radius: 10px;
    padding: 8px 10px;
    box-shadow: none !important;
}

#main_navbar .navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(255,255,255,.14) !important;
}

/* ---------- Zona de navegación ---------- */

#main_navbar .navbar-collapse {
    align-items: center;
}

#main_navbar .navbar-nav {
    align-items: center;
    gap: 6px;
    margin-bottom: 0 !important;
}

/*
   El código existente utiliza .btn-group alrededor de los elementos
   del menú. Los convertimos visualmente en elementos de navegación.
*/
#main_navbar .btn-group {
    margin: 2px 0;
}

/* Enlaces y botones principales */
#main_navbar .btn-group > li > a,
#main_navbar .btn-group > .btn,
#main_navbar .btn-group > li > .btn {
    border: 1px solid transparent !important;
    border-radius: 9px !important;
    background: transparent !important;
    color: rgba(255,255,255,.92) !important;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 12px !important;
    line-height: 1.25;
    text-decoration: none;
    box-shadow: none !important;
    transition:
        background-color .2s ease,
        color .2s ease,
        border-color .2s ease,
        transform .2s ease;
}

/* Hover de los botones del menú */
#main_navbar .btn-group > li > a:hover,
#main_navbar .btn-group > .btn:hover,
#main_navbar .btn-group > li > .btn:hover,
#main_navbar .btn-group > .btn:focus,
#main_navbar .btn-group > li > .btn:focus {
    background: rgba(255,255,255,.13) !important;
    border-color: rgba(255,255,255,.16) !important;
    color: #fff !important;
    transform: translateY(-1px);
}

/* ---------- Dropdown principal ---------- */

#main_navbar .dropdown-menu {
    min-width: 220px;
    margin-top: 8px !important;
    padding: 8px !important;
    border: 1px solid rgba(16,65,99,.10) !important;
    border-radius: 12px !important;
    background: rgba(255,255,255,.98) !important;
    box-shadow: 0 12px 30px rgba(0,0,0,.18) !important;
}

/* Flechita visual bajo el menú */
#main_navbar .dropdown-menu::before {
    content: "";
    position: absolute;
    top: -6px;
    left: 24px;
    width: 12px;
    height: 12px;
    background: #fff;
    transform: rotate(45deg);
    border-left: 1px solid rgba(16,65,99,.08);
    border-top: 1px solid rgba(16,65,99,.08);
}

/* Elementos dropdown */
#main_navbar .dropdown-item {
    position: relative;
    border-radius: 8px !important;
    padding: 9px 12px !important;
    color: #21435a !important;
    font-size: 14px;
    font-weight: 500;
    transition:
        background-color .18s ease,
        color .18s ease,
        padding-left .18s ease;
}

#main_navbar .dropdown-item:hover,
#main_navbar .dropdown-item:focus {
    background: #eaf4f8 !important;
    color: #104163 !important;
    padding-left: 16px !important;
}

/* ---------- Submenús ---------- */

#main_navbar .dropdown-submenu {
    position: relative;
}

#main_navbar .dropdown-submenu > .dropdown-menu {
    margin-top: -8px !important;
    margin-left: 5px !important;
}

#main_navbar .dropdown-submenu > .dropdown-menu::before {
    top: 18px;
    left: -6px;
    transform: rotate(-45deg);
    border-left: 0;
    border-top: 1px solid rgba(16,65,99,.08);
    border-right: 1px solid rgba(16,65,99,.08);
}

/* ---------- Usuario ---------- */

#main_navbar .usuario-sesion {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    margin: 0 !important;
    padding: 8px 15px !important;
    border: 1px solid rgba(255,255,255,.15);
    border-radius: 10px;
    background: rgba(255,255,255,.08);
    color: #fff !important;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.06);
}

/* ---------- Zona derecha ---------- */

#main_navbar .col-12.col-md-4 {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    padding-left: 12px;
}

/* ---------- Botón SALIR ---------- */

#main_navbar > .container-fluid > ul:last-child {
    margin: 0 0 0 10px !important;
    padding: 0 !important;
}

#main_navbar a.btn.btn-primary {
    border: 1px solid rgba(255,255,255,.24) !important;
    border-radius: 9px !important;
    padding: 10px 17px !important;
    background: rgba(255,255,255,.13) !important;
    color: #fff !important;
    font-size: 14px;
    font-weight: 700;
    box-shadow: none !important;
    transition:
        background-color .2s ease,
        border-color .2s ease,
        transform .2s ease;
}

#main_navbar a.btn.btn-primary:hover,
#main_navbar a.btn.btn-primary:focus {
    background: #fff !important;
    border-color: #fff !important;
    color: #104163 !important;
    transform: translateY(-1px);
}

/* ---------- Separación visual de los grupos ---------- */

#main_navbar .btn-group + .btn-group {
    margin-left: 2px;
}

/* ---------- El menú HERIA ---------- */

#main_navbar a[href*="heria"] {
    background: rgba(255,255,255,.09) !important;
    border-color: rgba(255,255,255,.12) !important;
}

#main_navbar a[href*="heria"]:hover {
    background: rgba(255,255,255,.18) !important;
}

/* ---------- Pequeño brillo al pasar por ACA UNAM ---------- */

#main_navbar .navbar-brand:hover {
    color: #fff !important;
}

/* ---------- Alertas debajo del encabezado ---------- */

#main_navbar + .container {
    padding-top: 14px;
}

#main_navbar + .container .alert {
    border: 0;
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(0,0,0,.08);
}

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

@media (max-width: 1199px) {

    #main_navbar .navbar-brand {
        margin-right: 12px;
        font-size: 20px;
    }

    #main_navbar .btn-group > li > a,
    #main_navbar .btn-group > .btn,
    #main_navbar .btn-group > li > .btn {
        font-size: 13px;
        padding: 9px 9px !important;
    }

    #main_navbar .usuario-sesion {
        font-size: 13px;
    }
}

@media (max-width: 991px) {

    #main_navbar .container-fluid {
        min-height: 62px;
        padding: 0 14px !important;
        flex-wrap: wrap;
    }

    #main_navbar .navbar-brand {
        margin-right: auto;
        padding-right: 15px !important;
    }

    #main_navbar .navbar-brand::after {
        display: none;
    }

    #main_navbar .navbar-collapse {
        width: 100%;
        padding: 12px 0 6px;
    }

    #main_navbar .navbar-nav {
        align-items: stretch;
        gap: 4px;
    }

    #main_navbar .btn-group {
        width: 100%;
    }

    #main_navbar .btn-group > li > a,
    #main_navbar .btn-group > .btn,
    #main_navbar .btn-group > li > .btn {
        display: block;
        width: 100%;
        text-align: left;
    }

    #main_navbar .col-12.col-md-4 {
        width: 100%;
        justify-content: space-between;
        padding: 10px 0 4px;
    }

    #main_navbar .dropdown-menu {
        position: static !important;
        width: 100%;
        margin: 4px 0 !important;
        box-shadow: none !important;
    }

    #main_navbar .dropdown-menu::before {
        display: none;
    }
}

@media (max-width: 575px) {

    #main_navbar .container-fluid {
        padding: 0 10px !important;
    }

    #main_navbar .navbar-brand {
        font-size: 18px;
    }

    #main_navbar .usuario-sesion {
        max-width: calc(100vw - 110px);
        overflow: hidden;
        text-overflow: ellipsis;
    }

    #main_navbar a.btn.btn-primary {
        padding: 9px 13px !important;
    }
}

/* ---------- Accesibilidad ---------- */

@media (prefers-reduced-motion: reduce) {
    #main_navbar *,
    #main_navbar *::before,
    #main_navbar *::after {
        transition: none !important;
    }
}