html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

a, .btn-link {
    color: #0366d6;
}

.btn-primary {
    color: #fff;
    background-color: #1b6ec2;
    border-color: #1861ac;
}

.content {
    padding-top: 1.1rem;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid red;
}

.validation-message {
    color: red;
}

.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.alert-info {
    background-color: #d9edf7;
    color: #31708f;
    border: 1px solid #bce8f1;
}

.alert-warning {
    background-color: #fcf8e3;
    color: #8a6d3b;
    border: 1px solid #faebcc;
}

.alert-danger {
    background-color: #f2dede;
    color: #a94442;
    border: 1px solid #ebccd1;
}

.close {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: inherit;
}

#blazor-error-ui {
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

    #blazor-error-ui .dismiss {
        cursor: pointer;
        position: absolute;
        right: 0.75rem;
        top: 0.5rem;
    }

.fixed-top.mi-barra-superior {
    top: 0;
    left: 320px; /* ancho de tu sidebar */
    width: calc(100% - 320px); /* resto del ancho */
    z-index: 1030; /* puede quedar sobre el contenido principal */
}