#main {
    min-height: 100vh;
    display: flex;
    align-items: center;
}
.checkin-card {
    width: 100%;
}
.checkin-card .circle-btn {
    width: 100px;
    height: 100px;
    margin: 5px auto;
    font-size: 38px;
}
.checkin-card .common-keyboard {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(4, 1fr);
    justify-content: center;
    align-items: center;
}
.checkin-card .checkin-input {
    font-size: 32px;
    height: 58px;
}
.checkin-card button[type="submit"] {
    min-height: 54px;
}
@media screen and (max-width: 767px) {
    .checkin-card .circle-btn {
        width: 70px;
        height: 70px;
        font-size: 30px;
        line-height: 1.1;
    }
}