styles.css

/* Body */
body {
    background-color: #19194d;
    font-family: 'Montserrat', sans-serif;
    text-align: center;
    height: 100ex;
    color: white;
    font-family: 'Montserrat', sans-serif;
}

/* Page 1 */
h1 {
    color: #ffeb99;
    font-family: 'Sacramento', cursive;
    font-size: 10rem;
}

.blink {
    animation: blinker 1s linear infinite;
}
@keyframes blinker {
    50% {
        opacity: 0;
    }
}

/* Page_2 */
#level-title {
    color: #ffeb99;
    font-weight: 800;
    font-size: 5rem;
    margin-bottom: 10%;
}

.container {
    display: block;
    width: 50%;
    margin: auto;

}

.btn {
    margin: 25px;
    display: inline-block;
    height: 200px;
    width: 200px;
    border: 10px solid black;
    border-radius: 20%;
}

.game-over {
    background-color: red;
    opacity: 0.8;
}

.red {
    background-color: red;
}

.green {
    background-color: green;
}

.blue {
    background-color: blue;
}

.yellow {
    background-color: yellow;
}

.pressed {
    box-shadow: 0 0 20px white;
    background-color: grey;
}