:root{--bg:#f6f7f9;--surface:#ffffff;--text:#16181d;--muted:#5b6270;--border:#d9dde3;--accent:#0b5cad;--accent-text:#ffffff;--error:#b42318;--error-bg:#fef3f2;--ok:#067647;--ok-bg:#ecfdf3;--focus:#2e90fa}@media (prefers-color-scheme:dark){:root{--bg:#0f1115;--surface:#181b21;--text:#eceef2;--muted:#a3aab8;--border:#2d323b;--accent:#4c9be8;--accent-text:#0f1115;--error:#f97066;--error-bg:#2a1614;--ok:#47cd89;--ok-bg:#102a1e}}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}main.center{min-height:100vh;display:grid;place-items:center;padding:1rem}.card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:2rem 1.5rem}.card h1{margin:0 0 .25rem;font-size:1.5rem}.card p.sub{margin:0 0 1.5rem;color:var(--muted)}form{grid-gap:1rem;gap:1rem}form,label{display:grid}label{grid-gap:.35rem;gap:.35rem;font-weight:600;font-size:.9rem}input{font:inherit;padding:.65rem .75rem;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text)}input.code{font-size:1.4rem;letter-spacing:.4em;text-align:center}.button,button{font:inherit;font-weight:600;padding:.7rem 1rem;border-radius:8px;border:0;background:var(--accent);color:var(--accent-text);cursor:pointer;text-decoration:none;text-align:center}button.secondary{background:transparent;color:var(--text);border:1px solid var(--border)}button:disabled{opacity:.6;cursor:progress}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}a{color:var(--accent)}.alert{padding:.75rem;border-radius:8px;font-size:.9rem}.alert.error{background:var(--error-bg);color:var(--error)}.alert.ok{background:var(--ok-bg);color:var(--ok)}.links{margin-top:1.25rem;font-size:.9rem;text-align:center}.qr{display:grid;place-items:center;background:#fff;border-radius:8px;padding:.75rem}.qr img{width:200px;height:200px}code.secret{word-break:break-all;font-size:.85rem}.app-header{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1rem;background:var(--surface);border-bottom:1px solid var(--border)}.app-main{max-width:900px;margin:0 auto;padding:1.5rem 1rem}table{width:100%;border-collapse:collapse;background:var(--surface)}td,th{text-align:left;padding:.6rem .75rem;border-bottom:1px solid var(--border)}.app-nav{display:flex;gap:1.25rem;align-items:center}.app-nav .brand{font-weight:700;color:var(--text);text-decoration:none}.stack{display:grid;grid-gap:1.5rem;gap:1.5rem}.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.25rem}.panel h2{margin-top:0;font-size:1.15rem}.grid-form{display:grid;grid-gap:1rem;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));align-items:end}select{font:inherit;padding:.6rem .75rem;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text)}.inline{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}.muted{color:var(--muted);font-size:.9rem}.table-wrap{overflow-x:auto}button.small{padding:.35rem .6rem;font-size:.85rem}button.danger{background:transparent;color:var(--error);border:1px solid var(--error)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}