html{
    box-sizing: border-box;
    height: 100%;
}

#goBack {
    position: absolute;
    top: 0;
    left: 0;
    color: black;
    text-decoration: none;
}

body{
    align-items: center;
    font-family: sans-serif;
    background: linear-gradient(90deg, rgba(173,128,44,1) 0%, rgba(255,0,146,1) 100%);
    display: flex;
    height: inherit;
    justify-content: center;
    overflow: hidden;
}

.calculator{
    background: rgba(255,255,255,0.3);
    border: 1px solid black;
    border-radius: 5px;
    box-shadow: 0 1px 10px;
    flex-basis: 450px;
    height: 600px;
    padding: 25px 20px;
}

.interface{
    background: rgba(255,255,255,0.7);
    border: 1px solid black;
    border-radius: 5px;
    box-shadow: 0 4px 30px rgba(10,10,10,0.2);
    font-size: 50px;
    overflow: auto;
    height: 58px;
    padding: 10px;
    text-align: right;
}

.button-row{
    display: flex;
    justify-content: space-between;
    margin:5%;
}

.button{
    padding: 15px 15px;
    font-size: 24px;
    text-align: center;
    cursor: pointer;
    outline: none;
    flex-basis: 20%;
    height: 60px;
    color: #fff;
    background-color: #04AA6D;
    border: none;
    border-radius: 15px;
    box-shadow: 0 9px #999;
}

.button:active {
    box-shadow: 0 5px #666;
    transform: translateY(4px);
}

.change-input{
    background: rgba(255, 218, 0, 0.65);
}

.change-input:hover{
    background: rgba(255, 218, 0, 0.4);
}

.calc-buttons{
    background: rgba(255, 0, 221, 0.27);
}

.calc-buttons:hover{
    background: rgba(255, 0, 221, 0.05);
}

.calc-number{
    background: rgba(0, 0, 0, 0.56);
    color: white;
}

.calc-number:hover{
    background: rgba(0, 0, 0, 0.3);
    color: white;
}