style.css

@import url('https://fonts.googleapis.com/css2?family=Audiowide&display=swap');
*{
    box-sizing: border-box;
}
html{
    overflow: -moz-scrollbars-none;
    -ms-overflow-style: none;
  }
html::-webkit-scrollbar { 
      width: 0 !important 
} 
body{
    background-color:#444;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
#container-div{
    position:relative;
    display: inline-block;
}

#small-container-div{
    position: absolute;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 2rem;
}

#player-health-bar{
    position: relative;
    height: 30px;
    width: 100%;
    display: flex;
    justify-content: flex-end;
}

#player-health-total{
    border-top-left-radius: 35px;
    border-bottom-left-radius: 35px;
    background-color: yellow; 
    height: 30px;
    width: 100%;
}

#player-health{
    border-top-left-radius: 35px;
    border-bottom-left-radius: 35px;
    position: absolute;
    background-color: rgb(2, 15, 255);
    top: 0; 
    right: 0;
    bottom: 0;
    width: 100%;
}

#timer{
    background-color: rgb(111, 0, 255);
    width: 140px;
    font-family: 'Audiowide', cursive;
    height: 100px;
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 900;
    font-size: 3rem;
    color: #fff;
    border-radius: 35px;
}

#enemy-health-bar{
    position: relative;
    height: 30px;
    width: 100%;
}

#enemy-health-total{
    border-top-right-radius: 35px;
    border-bottom-right-radius: 35px;
    background-color: yellow; 
    height: 30px;
}

#enemy-health{
    border-top-right-radius: 35px;
    border-bottom-right-radius: 35px;
    position: absolute;
    background-color: rgb(2, 15, 255);
    top: 0; 
    right: 0;
    left: 0;
    bottom: 0;
}
#game-message{
    position: absolute;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    -webkit-text-stroke: 2px #000;
    font-family: 'Audiowide', cursive;
    font-weight: 900;
    font-size: 3rem;
}

button{
    background-color: rgb(111, 0, 255);
    padding: 2rem;
    font-family: 'Audiowide', cursive;
    font-weight: 900;
    font-size: 3rem;
    color: #fff;
    border-radius: 35px;
    cursor: pointer;
}

button:hover{
    background-color: rgb(25, 0, 105);
    cursor: pointer;
}