styling.css

html{
    height: 100%;
    background: radial-gradient(circle,#fff,#ccc);
}

#container{
    height: 400px;
    width: 550px;
    background-color:#9DD2EA;
    margin: 100px auto;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 4px 0px 0px #009de4;
    position :relative;
}

#score{
    background-color: #F1FF92;
    color : #888E5F;
    padding : 10px;
    position: absolute;
    left: 500px;
    box-shadow: 0px 4px #9da853;
}

#correct{
    position: absolute;
    left: 260px;
    background-color:rgb(70, 202, 70) ;
    padding: 11px;
    display: none;
}

#wrong{
    position: absolute;
    left: 250px;
    background-color:rgb(228, 75, 75) ;
    padding: 11px;
    display: none;
}

#question{
    width: 450px;
    height: 150px;
     margin: 50px auto 10px auto;
     background-color: #9DA0EA;
     box-shadow: 0px 4px#535aa8;
     font-size: 100px;
     text-align: center;
     font-family: cursive, sans-serif;
     color: black;
}

#instruction{
    width: 450px;
    height: 50px;
    background-color: #8481D9;
    margin: 10px auto;
    text-align: center;
    line-height: 45px;
    box-shadow: 0px 4px #8153a8;
}

#choices{
    height: 100px;
    width: 450px;
    margin: 5px auto;
}

.box{
    width: 85px;
    height: 85px;
    background-color: white;
    float: left;
    margin-right: 36px;
    border-radius: 3px;
    cursor: pointer;
    box-shadow: 0px 4px rgpa( 0, 0, 0, 0.2);
    text-align: center;
    line-height: 80px;
    position: relative;
    transition: all 0.2s;
    -webkit-transition: all 0.2s;
}


.box:hover, #startreset:hover{
    background-color:#9C89F6;
    color: white;
    box-shadow: 0px 4px #6b54d3;
}

.box:active, #startreset:active{
    box-shadow: 0px 0px #6b54d3;
    top: 4px;
}

#box4{
    margin-right: 0;
}

#startreset{
    text-align: center;
    margin: 0 auto;
    padding: 10px;
    background-color: rgba(255, 255, 255, 0.5);
    width: 80px;
    border-radius: 3px;
    cursor: pointer;
    box-shadow: rgba(0, 0, 0, 0.2);
    position: relative;
    transition: all 0.2;
    -webkit-transition: all 0.2;
}

#timeremaining{
    width: 155px;
    padding: 10px;
    position: absolute;
    top: 390px;
    left: 400px;
    background-color: rgba(181, 235, 36, 0.78);
    border-radius: 3px;
    box-shadow: 0px 4px rgba(0, 0, 0, 0.2);
    /* visibility: hidden; */
    display: none;
}

#gameover{
    height: 200px;
    width: 500px;
    background: radial-gradient(#F3CA6B, #F3706C) ;
    color: white;
    font-size: 2.5em;
    text-transform: uppercase;
    text-align: center;
    position: absolute;
    top: 100px;
    left: 45px;
    display: none;
    text-transform: uppercase;
}