*,
*:before,
*:after {
    box-sizing: border-box;
}

.toolbar {
}

.tool-list {
    display: flex;
    flex-flow: row nowrap;
    list-style: none;
    padding: 0;
    margin: 1rem;
    overflow: hidden;
    border-raduis: 10px;
}

.tool {
}

.tool--btn {
    display: block;
    border: none;
    padding: .5rem;
    font-size: 20px;
}

#output {
    width: 100%;
    height: calc(1.5em + 0.75rem + 2px);
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    transition: border-color .15
}