body {
    font-family: monospace, Arial;
    text-align:center;
    background-color: black;
    color:white;
}


button:hover{
    background-color: #777;
}

#enemy-hp {
    display: inline-block;
}

#restart-btn {
    display: block;
    margin: 20px auto
}


/* @keyframes shake{
    0% {transform: translateX(0);}
    25% {transform: translateX(-5px);}
    50% {transform: translateX(5px);}
    75% {transform: translateX(-5px);}
    100% {transform: translateX(0);}
}

.hit-effect{
    animation: shake 0.3s ease-in-out;
} */