/* Container centré */
.document-unavailable-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
    text-align: center;
    padding: 50px 15px;
    background-color: #f8f9fa; /* fond léger */
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

/* Titre */
.document-unavailable-container h2 {
    font-size: 2rem;
    color: #dc3545; /* rouge Bootstrap pour erreur */
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
}

/* Texte descriptif */
.document-unavailable-container p {
    font-size: 1.1rem;
    color: #6c757d; /* gris Bootstrap */
    margin-bottom: 25px;
}

/* Bouton retour */
.document-unavailable-container .btn {
    padding: 10px 25px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 50px;
    transition: all 0.3s;
}

.document-unavailable-container .btn:hover {
    background-color: #218838; /* vert foncé au survol */
    color: #fff;
    text-decoration: none;
}