body {
    background-color: #000011;
    margin: 0;
    padding: 0;
    overflow: hidden;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
 
.start_container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}
 
.start_container button, #gameRule {
    padding: 12px 28px;
    font-size: 22px;
    cursor: pointer;
    background: #111;
    color: white;
    border: 2px solid green;
    border-radius: 6px;
}
 
.start_container button:hover, #gameRule:hover {
    background: #222;
}
 
.highscore p {
    color: white;
    font-size: 20px;
    font-family: Arial, sans-serif;
    margin: 0;
}
 
.gamerules {
    margin-top: 8px;
}
 
#game {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
}