html, body {
    padding: 0;
    margin: auto;
    height: 100%;
    position: relative;
    width: 75%;
    overflow: hidden;
}

#settings {
    height: 100%;
    position: relative;
}

.row {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid grey;
    height: 40px;
}

input {
    width: 80px;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
   opacity: 1;
}

div.percentage-symbol::after{
    content: "%";
    margin-left: -35px;
}