body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #cdcdcd;
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    width: 100%;
    max-width: 400px;
    height: 400px;
    border: 5px double black;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    position: relative;
}

.buttonholder {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

h2 {
    width: 100%;
    text-align: center;
}

p {
    margin-top: 0;
    width: 100%;
    text-align: center;
    font-size: 20px;
}

a.button {
    padding: 10px 25px;
    margin: 0 10px;
    font-size: 18px;
    border: 1px solid black;
    color: black;
    text-decoration: none;
}

a.back {
    position: absolute;
    top: 0;
    left: 0;
    border-right: 1px solid black;
    border-bottom: 1px solid black;
    color: black;
    text-decoration: none;
    padding: 5px 10px;
    background-color: #cdcdcd;
    border-radius: 0 0 10px 0;
}

.cont {
    width: 100%;
}

.input-holder {
    position: relative;
}

input {
    width: calc(100% - 22px);
    padding: 10px;
    text-align: center;
    font-size: 20px;
    border: 1px solid black;
}

.selection-code {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: calc(100% - 2px);
    background: #fff;
    z-index: 5;
    border-left: 1px solid black;
    border-right: 1px solid black;
    border-bottom: 1px solid black;
    text-align: center;
    max-height: 200px;
    overflow-y: auto;
}

.selection-code a {
    display: block;
    padding: 5px;
    cursor: pointer;
}

.selection-code a:hover {
    background: #cdcdcd;
}

.info .row {
    width: 100%;
    display: flex;
    justify-content: space-between;
    font-size: 18px;
}

.valinput {
    margin-top: 50px;
}

button.submit {
    display: block;
    cursor: pointer;
    border: 3px solid black;
    text-align: center;
    padding: 10px 20px;
    margin-top: 10px;
    font-size: 18px;
    background-color: #cdcdcd;
    font-weight: bold;
    text-transform: uppercase;
    width: 100%;
}

p.green {
    color: #008c1a;
}