body {
    margin: 0;
    background: #111;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: Arial, sans-serif;
    overflow: hidden;
}

#game {
    border: 5px solid #ff6600;
    background: linear-gradient(to bottom, #0a3d62, #87CEEB);
}

#ui {
    position: absolute;
    top: 15px;
    left: 15px;
    color: white;
    font-size: 26px;
    text-shadow: 2px 2px 5px black;
    pointer-events: none;
}

#restartBtn {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 12px 24px;
    font-size: 18px;
    background: #ff4444;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: all 0.2s;
}

#restartBtn:hover {
    background: #ff6666;
    transform: scale(1.05);
}