:root{--bg: #0f0f0f;--surface: #1a1a1a;--border: #2e2e2e;--accent: #e0e0e0;--muted: #666;--red: #e53e3e;--green: #38a169}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;background:var(--bg);color:var(--accent);font-family:Courier New,monospace;-webkit-tap-highlight-color:transparent;touch-action:none;-webkit-user-select:none;user-select:none}#root{height:100%;display:flex;flex-direction:column;align-items:center}button{font-family:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--accent);padding:8px 16px;font-size:13px;letter-spacing:.05em;transition:background .15s}button:hover{background:#252525}button:active{background:#2e2e2e}button.primary{border-color:var(--accent)}