:root{color-scheme:light;--paper:#fafbf8;--surface:#fff;--ink:#202d28;--muted:#59655f;--line:#d5dcd5;--accent:#245d45;--hover:#eaf1eb;--error:#974324;--radius:8px;--control-h:44px;--space:12px}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--accent);text-underline-offset:3px}a:hover{background:var(--hover)}button,input,select{font:inherit}button,a,summary,input,select{touch-action:manipulation;-webkit-tap-highlight-color:#d9e8dd}:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button{cursor:pointer}button:disabled{cursor:default;opacity:.65}.control{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:var(--control-h);padding:8px 16px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);color:var(--ink);font-size:.9rem;text-decoration:none;line-height:1.4}.control:hover{background:var(--hover)}.primary{background:var(--accent);border-color:var(--accent);color:white}.primary:hover{background:#194833;color:white}.shell{max-width:1000px;margin:auto;padding-inline:32px}header{border-bottom:1px solid var(--line)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:84px}.brand{font-size:.9rem;font-weight:650;letter-spacing:.02em}.navigation{display:flex;align-items:center;gap:20px;flex-wrap:wrap}nav a[aria-current=page]{font-weight:700;text-decoration-thickness:2px}main{padding-top:40px;padding-bottom:64px}h1{font-size:clamp(1.9rem,4vw,2.8rem);line-height:1.15;letter-spacing:-.035em;margin:8px 0 16px;font-weight:650}h2{font-size:1.35rem;letter-spacing:-.015em;margin:0 0 16px}h3{font-size:1rem;margin:0 0 6px}h1,h2,h3{text-wrap:balance;scroll-margin-top:24px}p{margin:8px 0 16px}.eyebrow{color:var(--muted);font-size:.8rem;letter-spacing:.08em;text-transform:uppercase}.lead{max-width:750px;color:var(--muted);font-size:1.05rem}.intro{margin-bottom:24px}.toc{display:flex;gap:8px 22px;flex-wrap:wrap;padding:16px 0;border-block:1px solid var(--line);margin:24px 0 32px;font-size:.9rem}.section{margin:34px 0}.section-head{display:flex;justify-content:space-between;gap:16px;align-items:baseline}.muted,small{color:var(--muted)}small{font-size:.85rem}.row{padding:20px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:32px minmax(0,1fr);gap:12px}.ref{color:var(--muted);font-size:.8rem;padding-top:2px;font-variant-numeric:tabular-nums}.comparison{display:grid;grid-template-columns:1fr 1.1fr;gap:24px;margin-top:10px}.label{display:block;font-size:.76rem;color:var(--muted);margin-bottom:4px}.comparison p{margin:0;font-size:.94rem}.answer{font-weight:600}.verdict{color:var(--error);font-size:.84rem}.verdict.correct{color:var(--accent)}details{margin-top:12px}summary{cursor:pointer;color:var(--accent);width:fit-content;padding:5px 0;min-height:36px;font-size:.9rem}summary:hover{background:var(--hover)}.lesson{padding:8px 0 0;max-width:770px;font-size:.94rem}.lesson p:last-child{margin-bottom:0}table{width:100%;border-collapse:collapse;font-size:.94rem}td,th{text-align:left;padding:10px 12px 10px 0;border-bottom:1px solid var(--line)}th{color:var(--muted);font-weight:500}.cycle{display:flex;flex-wrap:wrap;gap:8px 16px;padding:0;list-style:none;font-size:.93rem}.cycle li:not(:last-child)::after{content:' →';color:var(--muted);margin-left:12px}.note{border-left:3px solid var(--line);padding-left:16px;color:var(--muted);font-size:.88rem}.bottom-action{margin-top:32px}.skip{position:absolute;top:-100px;left:12px;z-index:9;background:white;padding:12px}.skip:focus{top:8px}footer{border-top:1px solid var(--line);padding:20px 0;font-size:.8rem;color:var(--muted)}.practice{max-width:760px;margin:auto}.practice h1{font-size:2rem}.progress-head{display:flex;justify-content:space-between;gap:12px;font-size:.87rem;color:var(--muted);margin-bottom:10px}progress{display:block;width:100%;height:5px;accent-color:var(--accent);border:0;background:var(--line)}progress::-webkit-progress-bar{background:var(--line)}progress::-webkit-progress-value{background:var(--accent)}.question-panel{margin:28px 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}.question-panel h2{font-size:1.3rem;margin:8px 0 20px}.options{display:grid;gap:10px}.option{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;min-height:48px;cursor:pointer}.option:hover{background:var(--hover)}.option:has(input:checked){background:var(--hover);border-color:var(--accent)}input[type=radio]{width:18px;height:18px;flex-shrink:0;accent-color:var(--accent);margin:0}input[type=text],select{min-height:var(--control-h);border:1px solid var(--line);border-radius:var(--radius);padding:8px 12px;color:var(--ink);background:white;max-width:100%;width:100%}fieldset{padding:0;margin:0;border:0;min-width:0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.order-row{display:grid;grid-template-columns:24px 1fr;align-items:center;gap:12px;margin:10px 0}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.feedback{padding-top:20px;margin-top:20px;border-top:1px solid var(--line)}.feedback h3{color:var(--accent)}.feedback.incorrect h3{color:var(--error)}.error{color:var(--error);font-size:.9rem;margin-top:12px}.question-nav{display:flex;align-items:center;justify-content:space-between;gap:12px}.question-nav select{width:auto;min-width:150px}.storage{font-size:.8rem;color:var(--muted);margin:24px 0 0}.result-title{font-size:2rem;margin:0 0 8px;font-variant-numeric:tabular-nums}.review-item{padding:14px 0;border-bottom:1px solid var(--line)}.review-item p{font-size:.9rem;margin:4px 0}.history-line{display:flex;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.9rem}.warning{color:var(--error)}[hidden]{display:none!important}
@media(max-width:650px){.shell{padding-inline:20px}.topbar{padding-block:16px;align-items:flex-start;flex-direction:column;gap:10px}.navigation{gap:16px;width:100%}.navigation .control{margin-left:auto;padding-inline:12px}main{padding-top:28px}.comparison{grid-template-columns:1fr;gap:10px}.section-head{display:block}.question-panel{padding:20px}.question-nav{flex-wrap:wrap}.question-nav select{min-width:0;flex:1}.row{gap:8px;grid-template-columns:24px minmax(0,1fr)}.lead{font-size:1rem}.brand{font-size:.8rem}.toc{margin-top:20px}.cycle{display:block}.cycle li{margin:6px 0}.cycle li:not(:last-child)::after{content:' ↓'}td,th{padding-right:8px}.history-line{flex-wrap:wrap} }
@media print{header,.toc,.bottom-action,button,footer{display:none}.shell{max-width:none;padding:0}body{background:white}details{break-inside:avoid}.row{break-inside:avoid}}

/* Review: keep each answer next to its correction; disclose correct work. */
.answer-line{display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 12px;margin:8px 0;font-size:.94rem}
.answer-line>span{min-width:0;overflow-wrap:anywhere}
.answer-label,.answer-arrow{color:var(--muted)}
.answer-correction{display:inline-flex;align-items:baseline;gap:12px}
.reason{font-size:.94rem;margin:8px 0;color:var(--ink);max-width:780px}
.row details{margin-top:4px}
.row .correct-entry{margin:0;min-width:0}
.correct-entry>summary{width:100%;padding:0;min-height:36px;color:var(--ink)}
.correct-entry>summary h3{display:inline;font-size:1rem}
.correct-note{display:inline-block;color:var(--accent);font-size:.85rem;font-weight:400;margin-left:12px}
.correct-entry[open]>summary{margin-bottom:10px}
.correct-entry .lesson{margin-top:12px}
.correct-overview{margin-top:0}
.correct-overview>summary{font-size:.94rem}
.disclosure-hint{color:var(--muted)}
@media(max-width:650px){.answer-line{gap:6px}.answer-line>span{flex-basis:100%}.correct-entry>summary{padding-bottom:4px}.correct-note{margin-left:8px}}
.photo-links{font-size:.85rem;white-space:nowrap}.photo-section{max-width:720px;scroll-margin-top:24px}.photo-image{display:block}.photo-image img{display:block;width:100%;height:auto}.section-head .photo-links{display:block;margin-bottom:16px}
/* A selected practice answer is not a correctness result. */
.practice .option:has(input:checked){background:#e9edf0;border-color:#536672}.practice input[type=radio]{accent-color:#536672}

/* Practice keeps its main action in the same row before and after submission. */
.practice .practice-question-nav{display:grid;grid-template-columns:auto 1fr;gap:12px;border-top:1px solid var(--line);padding-top:20px;margin-top:20px}
.practice-question-nav .primary{justify-self:end}
.practice .saved-answer{font-size:.87rem;margin:14px 0 0}
.practice #validation:empty{display:none}
.practice fieldset:disabled .option{cursor:default}


/* Dedicated practice session: one way out, no page tabs. */
.practice-session .session-topbar{max-width:824px;flex-direction:row;align-items:center;gap:16px}
.practice-session .session-topbar #translate{flex-shrink:0}
@media(max-width:450px){.practice-session .session-topbar{gap:12px}.practice-session .session-topbar #translate{font-size:.8rem;padding-inline:10px}.practice-session #exit-practice{font-size:.9rem}}

.test-subtitle{display:block;font-size:.8rem;font-weight:400;letter-spacing:0;color:var(--muted);margin-top:4px}
.language-switch{display:inline-flex;flex-shrink:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.language-switch .control{border:0;border-radius:0;min-width:44px;padding:8px 12px;margin:0!important}
.language-switch .control+ .control{border-left:1px solid var(--line)}
.language-switch .control[aria-pressed=true]{background:var(--accent);color:#fff}
.language-switch .control:focus-visible{outline-offset:-4px}
.topbar:has(.test-subtitle){align-items:center;flex-direction:row}
@media(max-width:650px){.topbar:has(.test-subtitle){align-items:flex-start}.topbar:has(.test-subtitle) .navigation{width:auto}.test-subtitle{max-width:240px}}

.practice summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}

.practice .active-question{margin-top:0}
.question-heading{display:flex;align-items:center;gap:24px;margin-bottom:24px}
.question-position{font-size:.87rem;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.question-heading progress{flex:1;min-width:0;height:4px}
.practice .active-question h2{margin-top:0}
.practice-session footer{display:none}
.bank-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:12px 0}
.bank-meta{display:flex;gap:12px;flex-wrap:wrap;font-size:.8rem;color:var(--muted);margin-bottom:10px}
.bank-extension{color:#754411;font-weight:650}
.bank-reason{font-size:.85rem;color:var(--muted);margin-top:8px}
.bank-item ol{padding-left:24px;margin-block:12px}.bank-item li{padding:3px 0}

.bank-legend{font-size:.85rem;color:var(--muted);margin:12px 0}
.bank-item.bank-new{background:#fffaf0;border-left:4px solid #b88636;padding-left:17px}
.bank-answer{background:#dcefe1;color:#195b37;border-radius:var(--radius);padding:10px 14px;margin:12px 0}
.bank-item details>p{font-size:.94rem;margin:10px 0 0}
.bank-item details>.bank-reason{font-size:.8rem}

.bank-filters{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:16px}
.bank-filters .control{padding-inline:14px}
.bank-filters [aria-pressed=true]{background:var(--accent);border-color:var(--accent);color:#fff}
.bank-count{font-size:.8rem;color:var(--muted);margin-left:4px}