@import url('https://fonts.googleapis.com/css?family=Codystar:300&display=swap');

body {
    align-items: center;
    font-family: 'Codystar';
    background: black;
}

.neons {
    margin-top: 4rem;
    margin-bottom: 4rem;
    text-align: center;
}

.neons h1 {
    font-size: 3rem;
    font-weight: bold;
    -webkit-animation: glow 2s ease-in-out infinite alternate;
    -moz-animation: glow 2s ease-in-out infinite alternate;
    animation: glow 2s ease-in-out infinite alternate;
}

@-webkit-keyframes glow {
    from {
    color: #fff;
    text-shadow: 0 0 10px #00fff2, 0 0 20px #00fff2, 0 0 30px #00fff2, 0 0 40px #00fff2, 0 0 50px #00fff2, 0 0 60px #00fff2, 0 0 70px #00fff2, 0 0 90px #00fff2;
}

to {
    color: gray;
    text-shadow: 0 0 20px #00fff2, 0 0 30px #00fff2, 0 0 40px #00fff2, 0 0 50px #00fff2, 0 0 60px #00fff2, 0 0 70px #00fff2, 0 0 80px #00fff2, 0 1 90px #00fff2;
    }
}

.calculator{
    text-align: center;
    margin: -15% auto;
    padding-top: 200px;
    width: 400px;
}

.calculator-screen{
    width: 100%;
    height: 100px;
    background-color: #fff154;
    color: black;
    text-align: right;
    font-size: 36px;
    border-color : black;
    border: 3px;
    padding: 0 20px;
    box-sizing: border-box;
}

.calculator-keys{
    width: 100%;
}

.row{
    display: flex;
}

button{
    height: 80px;
    background-color: gray;
    border: 1px solid black;
    font-size: 32px;
    color: #fff;
    width: 25%;
    outline: none;
}

.all-clear, .zero-btn{
    width: 50%;
}

.operator, .equal-sign{
    background-color: orange;
}

button:hover{
    background-color: darkgray;
}

.operator:hover, .equal-sign:hover{
    background-color: darkorange;
}

/* h1{
    font-family: 'Oswald', sans-serif;
    text-align: center;
} */


