* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
}

body {
    background-color: #4CAF50;
    overflow: hidden;
    font-family: Arial, sans-serif;
    touch-action: none; 
}

canvas {
    display: block;
    margin: 0 auto;
    background-color: #81C784;
    max-width: 100vw;
    max-height: 100vh;
}

#ui-top {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: #FFD700;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 18px;
    z-index: 10;
}

#ui-bottom {
    position: absolute;
    bottom: 20px;
    width: 100%;
    text-align: center;
    z-index: 10;
}

button {
    background: #FF9800;
    color: white;
    border: 2px solid #E65100;
    padding: 12px 24px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    margin: 0 10px;
    box-shadow: 0 4px #E65100;
}

button:active {
    box-shadow: 0 1px #E65100;
    transform: translateY(3px);
}