:root{--bg:#f8f9fa;--card:#fff;--muted:#6c757d;--primary:#0d6efd;--radius:8px;--shadow:0 2px 6px rgba(0,0,0,0.06);font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:#212529;display:flex;align-items:center;justify-content:center;padding:24px}.container{width:100%;max-width:980px}.card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);border:1px solid rgba(0,0,0,0.04)}h1{margin:0 0 12px 0;font-size:20px}.form-group{margin-bottom:12px}label{display:block;margin-bottom:6px;font-size:14px;color:var(--muted)}input[type="text"],input[type="email"],input[type="password"]{width:100%;padding:10px 12px;border:1px solid #dee2e6;border-radius:6px;font-size:14px}small.error{color:#a10000;display:block;margin-top:6px;font-size:13px}.button{display:inline-block;background:var(--primary);color:#fff;padding:10px 14px;border-radius:6px;border:none;cursor:pointer;font-weight:600;font-size:14px}.link{color:var(--primary);text-decoration:none;font-size:14px}.alert{padding:10px 12px;border-radius:6px;margin-bottom:12px}.alert-error{background:#fff0f0;border:1px solid #ffdddd;color:#a10000}.alert-success{background:#f0fff4;border:1px solid #ddffea;color:#006600}.toast{position:fixed;right:20px;bottom:20px;background:#333;color:#fff;padding:10px 14px;border-radius:6px;opacity:0;transform:translateY(10px);transition:all 250ms ease}.toast.show{opacity:1;transform:translateY(0)}.footer-links{margin-top:12px;font-size:13px;text-align:center}.footer-links a{margin:0 6px;color:var(--muted);text-decoration:none}@media (max-width:480px){.container{padding:12px}}