body {
    background: #1b3a2b;
    color: #fff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.ui {
    margin-top: 20px;
    margin-bottom: 10px;
    text-align: center;
}
#gameCanvas {
    background: #2e8b57;
    border: 8px solid #654321;
    border-radius: 20px;
    box-shadow: 0 0 20px #000a;
    display: block;
    margin: 0 auto;
}
.controls {
    margin-bottom: 10px;
}
.scoreboard span {
    margin: 0 10px;
    font-size: 1.2em;
}
button, select {
    font-size: 1em;
    padding: 5px 15px;
    margin: 0 5px;
    border-radius: 5px;
    border: none;
    outline: none;
}


button {
    background: #4caf50;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s;
}
button:hover {
    background: #388e3c;
}