style.css

@import url('https://fonts.googleapis.com/css2?family=Sedgwick+Ave&display=swap');

html{
    box-sizing: border-box;
}
body{   
    margin:0;
    height:100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgb(31, 22, 22);
}
.button-container{
    border:2px solide black;
    padding: 10px;
    border-radius: 15px;
    box-shadow:inset 10px 15px 10px -16px rgba(255, 255, 255, 0.7);
}
button{
    cursor: pointer;
    outline: none;
    width:120px;
    height: 75px;
    font-family: 'Sedgwick Ave', cursive;
    font-size: 25px;
    color: white;
    text-shadow: 0 3px 8px black;
    background:linear-gradient(to top,#332b2b,#999797);
    border:2px solid black;
    box-shadow: 7px;
    box-shadow:inset 0 20px 4px -19px rgba(255, 255, 255, 0.7),0 12px 12px 0 rgba(0, 0, 0, 0.3);
}
button:hover{
    background:linear-gradient(to bottom,#696969,#545454);
}
button:active{
    transform:translateY(3px);
    box-shadow:inset 0 6px 6px 0 rgba(0, 0, 0, 0.3);
}