body {
    background-color: rgb(243, 243, 243);
    margin: 0 auto;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 13px;
    color: rgb(17, 17, 17);
    text-align: center;
}
#container {
    display: block;
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}
#controls {
    border-top: 0px solid #eee;
    padding-top: 30px;
}
#arpu-data {
    border: 0px solid #CCC;
    padding: 10px;
    margin-bottom: 10px;
    text-transform: uppercase;
}
#arpu-value {
    font-weight: bold;
}
#presets {
    border: 1px solid #CCC;
    padding: 10px;
    margin-bottom: 10px;
}
.preset {
    display: inline-block;
    margin-right: 10px;
    width: 320px;
}
section {
    width: 100%;
    display: inline-block;
    max-width: 280px;
    height: 150px;
    vertical-align: middle;
    padding: 5px;
    text-align: left;
    margin: 0 auto;
    line-height: 20px;
}
h3 { 
    margin: 0px;
    color: #333;
    text-transform: uppercase;
}
input {
    border: 1px solid rgb(221, 215, 206);
    background-color: transparent;
    text-align: center;
    margin-right: 2px;
    font-weight: bold;
}
input.sum {
    width: 50px;
}
input.part {
    width: 20px;
}