.montenegro-boton-sesion {
    display: table;
    margin: 0 auto;
    background: #ffffff;
    color: #000000;
    border: 2px solid #000000;
    border-radius: 50px;
    padding: 14px 32px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    text-align: center;
    transition: background 0.2s, color 0.2s, transform 0.15s;
}

.montenegro-boton-sesion:hover {
    background: #000000;
    color: #ffffff;
    transform: translateY(-2px);
}