:root {
    --amu-blue: #00558B;
    --amu-blue-light: #2563a8;
    --amu-blue-hover: #f0f7ff;
    --amu-white: #FFFFFF;
    --amu-gray-light: #f8f9fa;
    --amu-text: #333333;
}

.navbar-amu {
    background-color: var(--amu-white) !important;
    padding: 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-top: solid var(--amu-blue-light) 1px;
}

.navbar-brand {
    color: var(--amu-blue) !important;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    padding: 1rem 1.5rem;
    background-color: transparent;
    margin-right: 0;
    transition: background-color 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-right: 1px solid rgba(0, 85, 139, 0.1);
}

.navbar-brand:hover {
    background-color: var(--amu-blue-hover);
    color: var(--amu-blue) !important;
}

.navbar-nav {
    height: 100%;
}

.navbar-nav .nav-item {
    height: 100%;
}

.navbar-nav .nav-link {
    color: var(--amu-blue) !important;
    font-weight: 500;
    padding: 1rem 1.25rem !important;
    transition: background-color 0.2s ease;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.3px;
    height: 100%;
    display: flex;
    align-items: center;
    border-right: 1px solid rgba(0, 85, 139, 0.1);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
    background-color: var(--amu-blue-hover);
    color: var(--amu-blue) !important;
}

.navbar-nav .dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu {
    background: var(--amu-white);
    border: 1px solid rgba(0, 85, 139, 0.1);
    border-radius: 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    margin-top: 0;
    padding: 0;
    min-width: 280px;
}

.dropdown-item {
    color: var(--amu-blue);
    padding: 0.75rem 1.25rem;
    font-weight: 400;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(0, 85, 139, 0.1);
    font-size: 0.9rem;
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--amu-blue-hover);
    color: var(--amu-blue);
}

.dropdown-divider {
    border-color: rgba(0, 85, 139, 0.2);
    margin: 0;
}

.navbar-toggler {
    border: 1px solid rgba(0, 85, 139, 0.3);
    border-radius: 0;
    padding: 0.5rem;
    margin: 0.5rem;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 85, 139, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Style pour le menu mobile */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background-color: var(--amu-white);
        margin-top: 0;
        padding: 0;
        box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        border-top: 1px solid rgba(0, 85, 139, 0.1);
    }

    .navbar-nav .nav-link {
        color: var(--amu-blue) !important;
        border-right: none;
        border-bottom: 1px solid rgba(0, 85, 139, 0.1);
        height: auto;
    }

    .navbar-nav .nav-link:hover {
        background-color: var(--amu-blue-hover);
        color: var(--amu-blue) !important;
    }

    .dropdown-menu {
        box-shadow: none;
        background-color: var(--amu-gray-light);
        margin-left: 1rem;
        border: 1px solid rgba(0, 85, 139, 0.1);
    }

    .dropdown-item {
        padding-left: 2rem;
        color: var(--amu-blue);
    }
}

/* Hauteur fixe pour la navbar */
.navbar {
    min-height: 60px;
}

/* Style pour les liens actifs */
.navbar-nav .nav-item.active .nav-link,
.navbar-nav .nav-link.active {
    background-color: var(--amu-blue-hover);
    color: var(--amu-blue) !important;
}

/* Amélioration de l'accessibilité */
.dropdown-item:focus {
    outline: 2px solid var(--amu-blue);
    outline-offset: -2px;
}

.navbar-nav .nav-link:focus {
    outline: 2px solid rgba(0, 85, 139, 0.5);
    outline-offset: -2px;
}