body{
    background-color: black;
    font-family: 'Open Sans', sans-serif;
}

/* #container{
    width: 1000px;
    height: 550px;
    background-image: url(./iamges/imgbg.jpg);
    background-repeat: no-repeat;
    background-size: 3000px 2000px;
    margin: 20px auto;

} */

#calculator{
    width: 320px;
    height: 520px;
    background-color: #eaedef;
    margin: 0 auto;
    top: 20px;
    position: relative;
    border-radius: 5px;
    box-shadow:grey;


}
#result{
    height: 120px;

}
#history{
    text-align: right;
    height: 20px;
    margin: 0 20px;
    padding-top: 20px;
    font-size: 20px;
    color: #919191;
}
#output{
    text-align: right;
    height: 60px;
    margin: 10px 20px;
    font-size: 30px;

}

#keyboard{
    height: 400px;
}

.operator, .number , .empty{
    width: 50px;
    height: 50px;
    margin: 15px;
    float: left;
    border-radius: 50%;
    border-width: 0;
    font-weight: bold;
    font-size: 15px;



}

.number , .empty{

    background-color: #eaedef;
}
.number, .operator{
    cursor: pointer;
}

.operator:active, .number:active{
	font-size: 13px;
}

.operator:focus, .number:focus, .empty:focus{
	outline: 0;
}

button:nth-child(8){
	font-size: 20px;
	background-color: #ffa500;
}
button:nth-child(12){
	font-size: 20px;
	background-color: #f08080;
}
button:nth-child(16){
	font-size: 20px;
	background-color: #7d93e0;
}
button:nth-child(20){
	font-size: 20px;
	background-color: #9477af;
}