:root{color-scheme:light}html,body{margin:0;padding:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:#f6f7fb;color:#0f172a}h1,h2,h3{font-family:Plus Jakarta Sans,Inter,ui-sans-serif,system-ui,sans-serif;letter-spacing:-.01em}.pm-hdr{background:#fff;border-top:4px solid #0f766e;border-bottom:1px solid #e2e8f0;box-shadow:0 1px 3px #0f172a0a;position:sticky;top:0;z-index:40}.pm-hdr-in{max-width:920px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.pm-logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:#0f172a}.pm-logo img{width:44px;height:44px;border-radius:12px;border:1px solid #e2e8f0;background:#fff;-o-object-fit:contain;object-fit:contain}.pm-word{font-family:Plus Jakarta Sans,Inter,sans-serif;font-weight:800;font-size:19px;letter-spacing:-.02em;color:#0f1f3d}.pm-word span{color:#0d9488}.pm-sec{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#0f766e;background:#f0fdfa;border:1px solid #99f6e4;padding:4px 10px;border-radius:999px}.pm-sp{flex:1}.pm-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px}.pm-actions .btn{padding:6px 12px;font-size:13px;font-weight:600;text-decoration:none}.pm-who{color:#475569;font-size:13px}.pm-who b,.pm-who strong{color:#0f172a}.pm-pro-hdr .shell{padding-top:28px}.pm-hdr.wide .pm-hdr-in{max-width:1080px}@media (max-width: 520px){.pm-word{display:none}.pm-hdr-in{padding:8px 14px}}@media print{.pm-hdr{display:none}}.pm-pro-fs,.pm-pro-fs body{height:100%;overflow:hidden;background:#fff}*,*:before,*:after{box-sizing:border-box}button{font:inherit;cursor:pointer}.pv-top{background:#000;color:#fff;padding:10px 14px;display:flex;align-items:center;gap:16px}.pv-top .pv-title{font-weight:600;font-size:14px;letter-spacing:.02em}.pv-top .pv-spacer{flex:1}.pv-top .pv-user{font-size:13px;opacity:.85}.pv-top .pv-clock{font-variant-numeric:tabular-nums;background:#1f2937;padding:4px 10px;border-radius:4px;font-size:14px}.pv-top .pv-clock.warn{background:#92400e}.pv-top .pv-clock.crit{background:#991b1b}.pv-toolbar{background:#e5e7eb;border-top:1px solid #cbd5e1;border-bottom:1px solid #cbd5e1;padding:6px 14px;display:flex;align-items:center;gap:10px;font-size:13px}.pv-flag-btn{display:inline-flex;align-items:center;gap:6px;border:1px solid #94a3b8;background:#fff;padding:4px 10px;border-radius:3px}.pv-flag-btn.on{background:#fef3c7;border-color:#d97706}.pv-body{padding:20px 24px;max-width:1024px;margin:0 auto}.pv-exhibit{background:#0b1220;color:#d1e4ff;padding:12px 14px;border-radius:6px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px;white-space:pre;overflow-x:auto;margin:12px 0}.pv-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;background:#f1f5f9;color:#0f172a;padding:1px 5px;border-radius:4px}.pv-topology{margin:12px 0;padding:0}.pv-topology svg{display:block;width:100%;max-width:720px;margin:0 auto}.pv-topology figcaption{font-size:11px;color:#64748b;text-align:center;margin-top:4px}.pv-scenario{background:#f8fafc;border-left:4px solid #0891b2;padding:10px 14px;margin:12px 0;font-size:14px;line-height:1.5}.pv-question{font-size:16px;line-height:1.55;margin:10px 0 14px}.pv-opts{display:flex;flex-direction:column;gap:8px}.pv-opt{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;border:1px solid #cbd5e1;border-radius:4px;background:#fff;cursor:pointer;font-size:14.5px;line-height:1.5}.pv-opt:hover{background:#f1f5f9}.pv-opt input{margin-top:3px}.pv-opt.sel{background:#eff6ff;border-color:#2563eb}.pv-bottom{position:sticky;bottom:0;background:#f1f5f9;border-top:1px solid #cbd5e1;padding:10px 14px;display:flex;gap:10px;justify-content:space-between;align-items:center}.pv-bottom button,.pv-bottom .pv-btn{background:#0f172a;color:#fff;border:0;padding:8px 16px;border-radius:4px;font-size:14px}.pv-bottom button[disabled]{opacity:.4;cursor:not-allowed}.pv-bottom .pv-btn.ghost{background:#fff;color:#0f172a;border:1px solid #94a3b8}.pv-bottom .pv-btn.warn{background:#991b1b}.shell{max-width:920px;margin:0 auto;padding:48px 20px}.brand{font-weight:800;letter-spacing:-.01em;color:#0f172a;font-size:20px}.brand .accent{color:#0d9488}.card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:24px;box-shadow:0 1px 2px #00000008}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 16px;border-radius:8px;background:#0d9488;color:#fff;font-weight:600;border:0}.btn:hover{background:#0b7f74}.btn.ghost{background:#fff;color:#0f172a;border:1px solid #cbd5e1}.btn.danger{background:#b91c1c}.input{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:8px;font:inherit;background:#fff}label{display:block;font-size:13px;font-weight:600;color:#334155;margin-bottom:4px}.muted{color:#64748b;font-size:13px}.pill{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;background:#e0f2fe;color:#075985;padding:3px 8px;border-radius:999px}.pill.pass{background:#dcfce7;color:#166534}.pill.fail{background:#fee2e2;color:#991b1b}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}.err{color:#b91c1c;font-size:13px;margin-top:8px}.ok{color:#166534;font-size:13px;margin-top:8px}.nav-strip{display:flex;gap:6px;flex-wrap:wrap;padding:12px 14px;background:#f8fafc;border-top:1px solid #cbd5e1;border-bottom:1px solid #cbd5e1}.nav-cell{width:34px;height:30px;border:1px solid #cbd5e1;background:#fff;border-radius:3px;font-size:12px;font-weight:600;color:#334155;display:inline-flex;align-items:center;justify-content:center;cursor:pointer}.nav-cell.ans{background:#cffafe;color:#0e7490;border-color:#22d3ee}.nav-cell.flag:after{content:"⚑";position:absolute;margin:-20px 0 0 20px;color:#d97706}.nav-cell.current{outline:2px solid #0f172a;outline-offset:1px}