#main {
    width: 100%;  
    margin: 60px auto 0 auto;  
    text-align: center;
}


select{
    font-size:28px;
}

button{
    font-size:28px;
    margin-left: 10px;
}

form{
    margin-top: 20px;
    margin-bottom: 40px;
}

span{
    font-size:28px;
}

#alarm_disp{
    margin-top:20px;
    font-size:18px;
}

#clear_btn{
    font-size:16px;
    margin-top:2px;
}

h1{
    font-size:20px;
}

h2{
    font-size:12px;
}