body, html {
    font-family: 'Courier New', Courier, monospace;
    font-size: 11pt;
}
.b-container {
    margin: 50px;
}
.b-flex {
    display: flex;
}
.b-flex div {
    padding-right: 20px;
}
input[type=text], input[type=number] {
    width: 150px;
    height: 36px;
    font-size: 13pt;
}
.b-color-red {
    color: red;
}
button {
    height: 36px;
    font-size: 13pt;
    background: rgb(36, 176, 241);
    border: 0px;
    color: #fff;
    cursor: pointer;
}
.b-hidden {
    display: none;
}