*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    background: #000818;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100dvh;
    overflow: hidden;
    font-family: 'Inter', sans-serif;
}
#game { display: block; touch-action: none; cursor: default; }
.back-link {
    position: fixed; top: 12px; left: 12px;
    color: rgba(255,255,255,0.45); font-family: 'Inter', sans-serif;
    font-size: 13px; font-weight: 600; text-decoration: none; z-index: 10; transition: color 0.2s;
}
.back-link:hover { color: #fff; }