:root{--fg:#18181b;--muted:#71717a;--bg:#fafafa;--line:#e4e4e7;--accent:#2563eb;color:var(--fg);background:var(--bg);font-family:system-ui,sans-serif}body{margin:0}header{border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:8px 16px;display:flex}header .spacer{flex:1}main{max-width:960px;margin:0 auto;padding:16px}a{color:var(--accent)}.error{color:#b91c1c}.muted{color:var(--muted)}.game-frame{border:1px solid var(--line);background:#fff;width:100%;height:calc(100vh - 160px);min-height:480px}.ad-after-game{margin-top:150px}.ad-below-button{margin-top:48px}