body{margin:0;background:#f5f5f5;color:#262626;font:16px/1.5 system-ui}main{max-width:420px;margin:12vh auto;padding:28px}h1{font-size:26px}form{display:grid;gap:18px}label{display:grid;gap:8px}input,button{font:inherit;padding:12px;border:1px solid #ccc;border-radius:8px}button{background:#262626;color:white;cursor:pointer}button.secondary{color:#262626;background:white}.oauth-foot{font-size:13px;color:#555}