/* Dave Defourneaux */

html {
    font-size: 70%;
    box-sizing: border-box;
}

body { 
    background-color: rgba(88, 40, 1, 0.767);
}

.blotter {
    padding: 50px;
    border: 10px solid rgba(32, 10, 0, 0.829);
    border-radius: 3px;
    margin:10px auto;
    width: 80%;
    position: relative;
    top:50px;
    /*transform: translate(-50%,-50%)*/
    background-color: rgb(18, 73, 18);
    
}

*, *:before, *::after {
    padding: 0;
    margin: 0;
    box-sizing: inherit;
}

.calculator {
    border: 2px solid darkslategray;
    border-radius: 10px;
    margin: 0 auto;
    width: 500px;
    position: relative;
    top: 50%;
    background-color: silver;
    box-shadow: -10px -10px 3px black;
    /*left: 50%;*/
    /*transform: translate(-50%,-50%);*/
}

.output {
    padding-right: 20px;
    padding-left: 20px;
    border: none;
    border-radius: 7px 7px 0px 0px;
    width: 100%;
    height: 100px;
    background-color: black;
    color: lime;
    font-size: 5.5rem;
    text-align: right;
}

button {
    border: 1px solid darkslategray;
    border-radius: 10px;
    box-shadow: -1px -1px 1px black;
    height: 70px;
    background-color: gray;
    background-image: linear-gradient(to bottom, transparent, transparent 50%, rgba(0,0,0,.06));
    color: black;
    font-size: 3.2rem;
    text-shadow: 0 1px rgba(255,255,255,.4);
}

button:hover {
    background-color: #9b9b9b;
}

.operator {
    background-color: lightgray;
    background-image: linear-gradient(to bottom, transparent, transparent 50%, rgba(0,0,0,.5));
}

.all-clear {
    border-color: darkslategray;
    background-color: rgb(255, 0, 0);
    color: #fff;    
}

.all-clear:hover {
    background-color: darkred;
}

.equal-sign {
    border-color: darkslategray;
    height: 100%;
    background-color: rgb(36, 10, 184);
    color: #fff;
    grid-area: 2 / 4 / 6 / 5;    
}

.equal-sign:hover {
    background-color: darkblue;
}

.keypad {
    padding:20px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 15px;
}