html, body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    height: 100%;
    width: 100%;
    position: fixed;
    color: black;
}

body {
    display: flex;
    flex-direction: column;
    height: 100vh;
    font-family: Arial, sans-serif;
    background-color: #000;
    color: #fff;
}

h1 {
    margin-bottom: 20px;
}

#gameArea {
    position: relative;
    width: 100vw;
    height: 100vh;
    border: 2px solid #fff;
    overflow: hidden;
    background-image: url('./images/background.png');
}

.tank {
    background-image: url('./images/tank.png');
    background-size: cover;
    width: 120px;
    height: 70px;
    position: absolute;
}

.monster {
    background-size: cover;
    position: absolute;
}

#scoreBoard {
    position: absolute;
    bottom: 20px;
    right: 20px;
    font-size: 24px;
    z-index: 100;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.progress {
    width: 100%;
    height: 5px;
    background-color: #ff0000;
    position: relative;
}

.progress-bar {
    position: absolute;
    width: 100%;
    height: 5px;
    background-color: #000000;
}

.bullet, .monsterBullet {
    position: absolute;
    background-color: #ffbf00;
    border-radius: 50%;

}

.monsterBullet {
    background-color: #f00;
    box-shadow: 0 0 10px 2px rgba(0, 0, 0, 0.5);
    filter: drop-shadow(0 0 2px rgba(255, 0, 0, 0.8));
} 

.bullet {
    box-shadow: 0 0 10px 2px rgba(0, 0, 0, 0.5);
    filter: drop-shadow(0 0 2px rgba(255, 100, 0, 0.8));
}

* {
    user-select: none !important;
    -moz-user-select: none !important;
    -webkit-user-select: none !important;
    -ms-user-select: none !important;
}