body {
    text-align: center;
    font-size: 16px;
    background: #fefefe;
    color: #0f0f0f;
}

* {
    box-sizing: border-box;
}

.main {
    width: 420px;
    max-width: 100%;
    margin: 0 auto;
    padding: 10px;
}

.in {
    font-size: 40px;
    line-height: 68px;
    margin-top: 11px;
    display: block;

}

.result {
    font-size: 60px;
    line-height: 68px;
    color: #E20613;
}

label {
    display: block;
    font-size: 11px;
    text-align: left;
}

input {
    height: 60px;
    line-height: 68px;
    padding: 0 5px;
    font-size: 40px;
    text-align: center;
    width: 100%;
    border: 1px solid #000;
    background: #fefefe;
}

button {
    height: 60px;
    line-height: 60px;
    padding: 0 5px;
    font-size: 20px;
    text-align: center;
    width: 100%;
    border: 1px solid #000;
    background: #E20613;
    font-weight: bold;
}

[class*="col-"] {
    display: block;
    float: left;
}
.col-1-3 {
    width: 33.33333%;
}
.col-2-3 {
    width: 66.66666%;
}
.col-3-3 {
    width: 100%;
}

.mtm {
    margin-top: 30px;
}
.mbm {
    margin-bottom: 30px;
}

.cf:before,
.cf:after {
    content: " ";
    display: table;
}

.cf:after {
    clear: both;
}

.cf {
    *zoom: 1;
}