:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:#1d1f21;background:#f4f6f8}*{box-sizing:border-box}body{margin:0}.auth-page{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-card{width:100%;max-width:420px;background:#fff;border:1px solid #d9e0e8;border-radius:12px;padding:24px}h1{margin-top:0;margin-bottom:18px}.mode-toggle{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:16px}.mode-toggle button,form button,.session-box button{border:1px solid #bdc8d6;border-radius:8px;padding:10px 12px;background:#fff;cursor:pointer}.mode-toggle .active{border-color:#0d6efd;background:#e8f1ff}form{display:grid;gap:10px}label{font-size:14px;color:#4c5561}input{border:1px solid #bdc8d6;border-radius:8px;padding:10px 12px}.message{margin-top:16px;font-size:14px}.ok{color:#1c7c3a}.err{color:#b32424}