/* Estilos básicos de alertas de Bootstrap */
.alert {
    position: relative;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid transparent;
    border-radius: 5px;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-danger {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-dismissible {
    padding-right: 35px;
}

.alert-dismissible .btn-close {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 5px 10px;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: inherit;
}

.alert-dismissible .btn-close:hover {
    background-color: transparent;
    color: #000;
    opacity: 0.75;
}

.alert-dismissible .btn-close:focus {
    box-shadow: none;
}