@import url('https://fonts.googleapis.com/css?family=Roboto:400,100');

body {
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    background: rgb(245, 245, 245);
    font-family: 'Roboto', sans-serif;
    color: #2f2f2f
}

.calc-container {
    display: grid;
    grid-template-columns: 100px 100px 100px 100px;
    width: 400px;
    background-color: rgb(122, 184, 255);
    padding: 10px;
}

.calc-display {
    width: 395px;
    height: 70px;
    padding-bottom: 20px;
    resize: none;
}

.calc-item {
    background-color: rgb(228, 228, 228);
    border: 1px solid #2f2f2f;
    padding: 20px;
    font-size: 30px;
    text-align: center;
}
  
.calc-item:hover {
    background-color: rgb(195, 195, 195);
}