.circulo {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    width: 50px;
    height: 50px;
    -moz-border-radius: 50%;
    -webkit-border-radius: 50%;
    border-radius: 50%;
    text-align: center;
    max-width: 50px;
    max-height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.circulo.activo {
    background: #049ce3;
    border: solid #3b6ccc;
    border-width: 4px;
    color: white;
}
.circulo.inactivo{
    background: white;
    border: solid #b5bac9;
    border-width: 4px;
    color: #b5bac9;
}
.circulo.cancelacion{
    background: #fa6351;
    border: solid #be1704;
    border-width: 4px;
    color: white;
}