:root{color-scheme:light;--bg: #f3f0e8;--card: #fffdfb;--ink: #1b2430;--muted: #3e4c5e;--footer: #3a4654;--line: #e2dacd;--brand: #1a4e89;--brand-ink: #fff;--brand-soft: #e7f0fa;--good: #0d6834;--good-bg: #e5f6ec;--bad: #9f1d16;--bad-bg: #fdeceb;--warn: #8a4b00;--focus: #ffbf47;--shadow: 0 1px 2px rgba(27, 36, 48, .04), 0 10px 28px rgba(27, 36, 48, .05);--sans: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;--serif: "Liberation Serif", "Iowan Old Style", Palatino, Georgia, "Times New Roman", serif}@media (prefers-color-scheme: dark){:root{color-scheme:dark;--bg: #121820;--card: #1b2430;--ink: #e8eef5;--muted: #c3ceda;--footer: #c5d0dc;--line: #334456;--brand: #8eb6ff;--brand-ink: #0c1420;--brand-soft: #24344c;--good: #7ddeaf;--good-bg: #143024;--bad: #ffaaa2;--bad-bg: #3d1c1a;--warn: #f0b45a;--shadow: 0 1px 2px rgba(0, 0, 0, .25), 0 12px 32px rgba(0, 0, 0, .22)}}*{box-sizing:border-box}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%}body{margin:0;font:400 1.0625rem/1.6 var(--sans);background:var(--bg);color:var(--ink)}.wrap{max-width:960px;margin:0 auto;padding:0 24px}.card,.topbar,.option,.choice,.nav,.nav-cluster{min-width:0}h1,h2,.brand{font-family:var(--serif);letter-spacing:-.02em}h1{font-size:1.85rem;line-height:1.2;font-weight:700;margin:0 0 .45em}h2{font-size:1.45rem;line-height:1.25;font-weight:700;margin:0 0 .75rem}.top{background:var(--card);border-bottom:1px solid var(--line)}.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px 20px;flex-wrap:wrap;min-height:68px;padding-top:14px;padding-bottom:14px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:1.55rem;line-height:1;color:var(--ink);text-decoration:none}.brand:before{content:"";width:12px;height:12px;border-radius:3px;background:var(--brand);box-shadow:4px 4px color-mix(in srgb,var(--brand) 35%,transparent)}.tag{color:var(--muted);font-size:.82rem;font-weight:600;letter-spacing:.01em;line-height:1.35;padding:5px 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srgb,var(--brand) 45%,var(--line));background:var(--brand-soft)}.grid{display:grid;gap:16px}@media (min-width: 760px){#start{grid-template-columns:1fr 1fr;column-gap:16px}#start fieldset,#start .muted,#start .btn{grid-column:1 / -1}}fieldset{border:0;padding:0;margin:0;min-width:0}legend{padding:0;margin-bottom:8px;font-weight:700;font-size:.95rem}.grid>label{font-weight:600;font-size:.95rem}select,.input{display:block;width:100%;margin-top:6px;min-height:44px;font:inherit;font-weight:400;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--ink)}.choice{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:10px;margin:8px 0;cursor:pointer;line-height:1.45;background:var(--card)}.choice input{margin-top:4px;width:18px;height:18px;flex:none}.choice:has(input:checked){border-color:var(--brand);background:var(--brand-soft);box-shadow:inset 3px 0 0 var(--brand)}.choice span{min-width:0}.btn{font:inherit;font-weight:600;min-height:44px;padding:10px 16px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer;text-align:center}.btn:hover:not(:disabled){border-color:var(--brand)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--brand-ink);font-weight:700}.btn.big{font-size:1.05rem;min-height:48px}.btn.small{min-height:44px;padding:8px 14px;font-size:.92rem}.btn.quiet{background:transparent;border-color:transparent;color:var(--muted);font-weight:600}.btn.quiet:hover:not(:disabled){background:var(--bg);border-color:var(--line);color:var(--ink)}.btn.flag-on{border-color:var(--warn);color:var(--warn);background:color-mix(in srgb,var(--warn) 12%,var(--card))}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.muted{color:var(--muted)}.small{font-size:.84rem;line-height:1.45}.badge{display:inline-block;margin-right:6px;padding:2px 8px;border-radius:99px;background:var(--bg);border:1px solid var(--line);font-size:.75rem;font-weight:700;letter-spacing:.02em;vertical-align:1px}.badge.ok{color:var(--good);border-color:var(--good);background:var(--good-bg)}.access-card:has(.unlock-panel){display:grid;gap:12px;align-items:start}.access-card:has(.unlock-panel)>h2{margin-bottom:0}.access-card:has(.unlock-panel)>.access-status{margin:0;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}.unlock-panel{margin:0;padding:16px;border-radius:12px;border:1px solid color-mix(in srgb,var(--brand) 32%,var(--line));background:var(--brand-soft)}.offer{margin:0 0 12px;color:var(--ink);line-height:1.5}.access-status{margin-top:0}.auth-form{display:grid;gap:8px;margin-top:4px}.auth-form label{font-weight:700;font-size:.92rem}.auth-row .input{flex:1 1 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14px}.stem{font-size:1.15rem;font-weight:600;line-height:1.45;max-width:68ch}.option{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin:8px 0;cursor:pointer;min-height:48px;background:var(--card)}.option:hover:not(.right):not(.wrong){border-color:color-mix(in srgb,var(--brand) 50%,var(--line))}.option:has(input:checked){border-color:var(--brand);background:var(--brand-soft);box-shadow:inset 3px 0 0 var(--brand)}.option input{margin-top:4px;flex:none;width:18px;height:18px}.option input:focus-visible{outline:none}.option:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:2px}.option .letter{flex:none;width:1.75rem;height:1.75rem;display:inline-flex;align-items:center;justify-content:center;border-radius:7px;background:var(--bg);border:1px solid var(--line);font-size:.8rem;font-weight:700;color:var(--muted)}.option>span:nth-child(3){flex:1;min-width:0;padding-top:2px;line-height:1.45;overflow-wrap:anywhere}.option:has(input:checked) .letter{color:var(--brand);border-color:var(--brand)}.option.right,.option.right:has(input:checked){border-color:var(--good);background:var(--good-bg);box-shadow:inset 3px 0 0 var(--good)}.option.wrong,.option.wrong:has(input:checked){border-color:var(--bad);background:var(--bad-bg);box-shadow:inset 3px 0 0 var(--bad)}.option.right .letter,.option.right:has(input:checked) .letter{color:var(--good);border-color:var(--good);background:transparent}.option.wrong .letter,.option.wrong:has(input:checked) .letter{color:var(--bad);border-color:var(--bad);background:transparent}fieldset:disabled .option{cursor:default}.exhibit{margin:0 0 12px;max-width:100%}.exhibit figcaption{font-size:.8rem;color:var(--muted);margin-bottom:4px}pre{white-space:pre-wrap;word-break:break-word;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px;font-size:.85rem;overflow:auto;margin:0;max-width:100%}.exhibit-pre{margin:8px 0}.feedback{border-radius:12px;padding:14px 16px;margin-top:14px;outline:none}.feedback p{margin:.4em 0;max-width:68ch}.feedback p:first-child{margin-top:0}.feedback.good{background:var(--good-bg);border:1px solid var(--good)}.feedback.bad{background:var(--bad-bg);border:1px solid var(--bad)}.nav{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.nav-cluster{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.nav .btn.quiet{margin-left:auto}.qnav-label{margin:0 0 10px;font-size:.84rem;font-weight:700;color:var(--muted)}.jumps{display:flex;flex-wrap:wrap;gap:8px}.jump{min-width:44px;min-height:44px;padding:0 6px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-variant-numeric:tabular-nums;cursor:pointer}.jump.done{background:var(--brand-soft);border-color:color-mix(in srgb,var(--brand) 35%,var(--line));font-weight:700}.jump.flagged{border-color:var(--warn);box-shadow:inset 0 -3px 0 var(--warn)}.jump.cur{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}.jump.cur:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.domtable{width:100%;border-collapse:collapse;margin:12px 0}.domtable td,.domtable th{text-align:left;padding:8px 8px 8px 0;border-bottom:1px solid var(--line);vertical-align:top}.domtable th{font-size:.78rem;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);font-weight:700}.answers{padding-left:0;list-style:none}.answers li{padding:8px 10px;border-radius:8px;margin:4px 0;overflow-wrap:anywhere}.answers .right{background:var(--good-bg)}.answers .wrong{background:var(--bad-bg)}.good-t{color:var(--good);font-weight:700}.bad-t{color:var(--bad);font-weight:700}.bars{list-style:none;padding:0;margin:8px 0 14px}.bars li{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(88px,140px) 3rem;gap:8px 10px;align-items:center;margin:8px 0;font-size:.92rem}.bars li>span:first-child{min-width:0;line-height:1.35}.bar{height:8px;background:var(--line);border-radius:99px;overflow:hidden}.bar i{display:block;height:100%;background:var(--brand)}.num{text-align:right;font-variant-numeric:tabular-nums}.foot{margin-top:12px;border-top:1px solid var(--line)}.foot .wrap{padding-top:18px;padding-bottom:40px}.foot p{margin:0;max-width:72ch;color:var(--footer);font-size:.875rem;line-height:1.55}.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--card);color:var(--ink);padding:8px 12px;z-index:9;border-radius:8px;border:1px solid var(--line)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}@media (min-width: 800px){.hero{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,360px);column-gap:36px;row-gap:0;align-items:center}.hero h1,.hero .lede{grid-column:1;min-width:0}.hero .features{grid-column:2;grid-row:1 / span 2;grid-template-columns:1fr;align-self:center;margin:0;padding:0 0 0 28px;border-top:0;border-left:1px solid var(--line)}.access-card:has(.unlock-panel){grid-template-columns:minmax(0,.85fr) minmax(0,1.2fr);column-gap:16px}.access-card:has(.unlock-panel)>h2{grid-column:1 / -1}}@media (max-width: 640px){.wrap{padding:0 16px}.card{padding:18px 16px;margin:14px 0}.hero{margin-top:16px;padding:22px 16px 16px}.hero h1{font-size:1.7rem;max-width:none}.features{grid-template-columns:1fr;gap:8px}.topbar{align-items:flex-start;min-height:0;padding-top:14px;padding-bottom:12px}.nav{flex-direction:column;align-items:stretch}.nav-cluster{display:grid;grid-template-columns:1fr 1fr;width:100%}.nav-cluster .btn.primary,#flag{grid-column:1 / -1}.nav-cluster .btn.primary{order:-1}.nav .btn.quiet,#finish{margin-left:0;width:100%}.auth-row,.auth-alt,.access-actions{flex-direction:column;align-items:stretch}.auth-row .input,.auth-row .btn,.auth-alt .btn,.access-actions .btn{width:100%;flex:1 1 auto}.bars li{grid-template-columns:minmax(0,1fr) auto}.bars li .bar{grid-column:1 / -1}.choice{padding:12px}}@media (prefers-reduced-motion: reduce){*{transition:none!important;scroll-behavior:auto!important}}