#box{
    text-align: center;
    margin: 40px 20px;
}
#btnBox{
    margin:20px;
}
button{
    cursor: pointer;
}
#clockBox{
    margin:20px;
}
#clock{
    display: inline-block;
    width:40px;
    text-align: left;
}
.l{
    font-size: 0;
}
.l>span{
    
    border: 1px solid #bec6d4;
    width: 50px;
    height: 50px;
    text-align: center;
    LINE-height: 40px;
    display: inline-block;
}
.l>span>input{
    FONT-SIZE: 25px;
    border: none;
    background-color: transparent;
    WIDTH: 46px;
    HEIGHT: 46px;
    LINE-HEIGHT: 46px;
    TEXT-ALIGN: center;
    margin: 0px;
    FONT-FAMILY: Verdana;
}
.l>span>input:hover{
    cursor: pointer;
    /* background-color:green; */
}
.l0>span, .l3>span, .l6>span{
    border-top:2px solid #344861
}
.l8>span{
    border-bottom:2px solid #344861
}
.l>span:first-child{
    border-left: 2px solid #344861
}
.l>span:last-child{
    border-right: 2px solid #344861
}
.l>span:nth-child(3), .l>span:nth-child(6){
    border-right: 2px solid #344861
}

#msg{
    font-size: 30px;
    font-weight: bold;
}
.error{
    border-color: red!important;
}
#instruction p{
    margin:20px 60px;
    
}