:root{--bg:#f6f7f9;--panel:#fff;--ink:#14181f;--muted:#5b6573;--line:#dde1e7;--brand:#1f4fd8;--brand-ink:#fff;--danger:#b42318;--danger-bg:#fdecea;--info-bg:#e8f0fe;--warn-bg:#fff4d6;--warn-ink:#6b4b00}@media (prefers-color-scheme:dark){:root{--bg:#0f1218;--panel:#171b23;--ink:#e8ebf0;--muted:#98a2b3;--line:#2a303b;--brand:#6c93ff;--brand-ink:#0b1020;--danger:#ff8a80;--danger-bg:#3a1714;--info-bg:#172544;--warn-bg:#3b2f0b;--warn-ink:#ffd886}}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--brand)}h1{margin:0 0 16px;font-size:22px}h2{margin:24px 0 10px;font-size:17px}.shell{grid-template-columns:220px 1fr;min-height:100vh;display:grid}.side{background:var(--panel);border-right:1px solid var(--line);flex-direction:column;gap:6px;padding:16px;display:flex}.side .brand{margin-bottom:4px;font-size:18px;font-weight:700}.side .practice{color:var(--muted);word-break:break-word;margin-bottom:12px;font-size:13px}.side a.nav{color:var(--ink);border-radius:8px;padding:8px 10px;text-decoration:none}.side a.nav[aria-current=page]{background:var(--info-bg);font-weight:600}.side .spacer{flex:1}.main{width:100%;max-width:1000px;padding:24px 32px}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;margin-bottom:16px;padding:20px}.auth{max-width:420px;margin:8vh auto;padding:0 16px}.row{flex-wrap:wrap;align-items:end;gap:12px;display:flex}.field{flex-direction:column;flex:200px;gap:4px;margin-bottom:12px;font-size:14px;display:flex}.field span{font-weight:600}input,select{font:inherit;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:8px;padding:9px 10px}input:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible{outline:2px solid var(--brand);outline-offset:2px}button{font:inherit;border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer;border-radius:8px;padding:9px 14px}button.primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand);font-weight:600}button.danger{color:var(--danger)}button:disabled{opacity:.55;cursor:not-allowed}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:8px 10px}th{text-transform:uppercase;letter-spacing:.04em;color:var(--muted);font-size:12px}.banner{border-radius:8px;margin-bottom:14px;padding:10px 12px}.banner.error{background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger)}.banner.info{background:var(--info-bg)}.banner.warn{background:var(--warn-bg);color:var(--warn-ink);border:1px solid var(--warn-ink)}.field-error{color:var(--danger)}.muted{color:var(--muted)}.badge{border:1px solid var(--line);border-radius:999px;padding:1px 8px;font-size:12px;display:inline-block}.badge.ok{background:var(--info-bg)}.badge.off{background:var(--warn-bg);color:var(--warn-ink)}code,.mono{word-break:break-all;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px}.codes{background:var(--bg);border:1px dashed var(--line);border-radius:8px;grid-template-columns:repeat(2,1fr);gap:6px;padding:12px;display:grid}@media (max-width:760px){.shell{grid-template-columns:1fr}.side{flex-flow:wrap;align-items:center}.main{padding:16px}}