:root{--ink:#233147;--muted:#788294;--line:#e4e8ee;--blue:#435ee2;--paper:#f6f8fb;--white:#fff;--danger:#ac4848}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.65}button,input,select,textarea{font:inherit}button,a,input,select,textarea{ -webkit-tap-highlight-color:transparent}button{border:1px solid var(--line);border-radius:9px;background:white;padding:10px 16px;color:var(--ink);cursor:pointer;transition:background .15s}button:hover{background:#edf0f8}button:disabled{opacity:.55;cursor:wait}button.primary{background:var(--blue);color:white;border-color:var(--blue)}button.primary:hover{background:#354ece}button.text-button{border:0;background:transparent;color:var(--blue)}a{color:var(--blue);text-decoration:none}input,select,textarea{width:100%;border:1px solid #dce1eb;background:#fff;border-radius:8px;padding:11px 12px;outline:none;color:var(--ink)}input:focus,textarea:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px #435ee211}textarea{resize:vertical;line-height:1.7}label{display:block;margin:15px 0;font-size:14px;font-weight:550}label input,label select,label textarea{display:block;margin-top:7px;font-weight:400}h1,h2,h3,p{margin-top:0}h1{font-size:32px;line-height:1.35;letter-spacing:-1px;margin-bottom:12px}h2{font-size:19px;margin-bottom:20px}h3{font-size:17px}.muted{color:var(--muted)}.small{font-size:12px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:650;color:#98a2b2;margin:0 0 12px}.topbar{height:76px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;padding:0 36px;gap:30px}.brand{color:var(--ink);font-size:21px;white-space:nowrap}.top-note{font-size:13px;color:var(--muted)}#account{margin-left:auto;display:flex;gap:15px;align-items:center;font-size:13px}#account button{padding:6px 12px}.auth{max-width:1000px;margin:65px auto;display:grid;grid-template-columns:1.2fr 1fr;gap:85px;padding:38px}.auth-intro h1{font-size:57px;margin:18px 0;line-height:1.3}.auth-intro p{color:var(--muted);font-size:18px}.auth form{background:white;padding:36px;border:1px solid var(--line);border-radius:16px;align-self:center}.auth form button{width:100%;margin-top:15px}.pills{display:flex;gap:12px}.pills span,.chip{background:#eaf0ff;border:1px solid #dbe4fb;padding:5px 11px;border-radius:30px;color:#526aaa;font-size:12px}#app{display:grid;grid-template-columns:222px 1fr;min-height:calc(100vh - 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/* Compact study layout and persistent shortcuts. */
body{font-size:14px;line-height:1.5}.topbar{height:54px;padding:0 20px;gap:20px}.brand{font-size:18px}#app{grid-template-columns:164px minmax(0,1fr);min-height:calc(100vh - 54px)}.sidebar{padding:20px 10px}.sidebar nav{gap:4px}.sidebar nav button{padding:10px 9px;font-size:13px}.main-content{padding:20px;max-width:1400px}.heading{margin-bottom:16px}h1{font-size:25px;margin-bottom:8px}h2{font-size:17px;margin-bottom:13px}h3{font-size:15px}.panel{padding:18px}.generator-grid{gap:16px}button{padding:7px 11px}input,select,textarea{padding:8px 10px}label{margin:10px 0}.bank-tools{margin-bottom:12px}.chapter-tabs{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}.chapter-tabs button{font-size:12px}.chapter-tabs .active{background:var(--blue);color:#fff}.inline-label{display:flex;align-items:center;gap:10px}.inline-label select{width:160px}#bank{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.set-card{padding:13px;margin:0;gap:10px;display:block}.set-card h3{margin:8px 0}.set-card p{margin:5px 0;font-size:12px}.set-card .card-actions{flex-direction:row;flex-wrap:wrap;margin-top:10px}.question{padding:16px;margin:12px 0;scroll-margin-top:16px}.question h3{line-height:1.6;margin:8px 0 10px}.option{padding:8px 10px;margin:7px 0;gap:9px;line-height:1.6}.option input{margin-top:4px}.explanation{padding:12px;font-size:13px}.score{padding:14px;margin:12px 0}.quick-switch{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.quick-switch label{display:flex;align-items:center;gap:10px;flex:1;min-width:220px}.quick-switch select{width:100%;max-width:700px;margin:0}.number-panel{margin:8px 0 12px;padding:8px 0;border:0}#questionNumbers{display:grid;grid-template-columns:repeat(20,minmax(0,1fr));gap:4px;margin-top:8px}#questionNumbers button{padding:5px 0;border-radius:5px;font-size:11px;min-width:0}#questionNumbers .answered{background:#e4eaff;color:#304ccc}#questionNumbers .right{background:#daf0e5;color:#226b48}#questionNumbers .incorrect{background:#ffe5df;color:#a34236}#questionNumbers .current{outline:1px solid #435ee2;outline-offset:-1px}.quiz-toolbar{gap:12px;margin-bottom:10px}.wrong-tools{display:grid;grid-template-columns:150px minmax(0,1fr);gap:10px;margin:12px 0}#history{display:grid;gap:10px}.wrong-events{max-height:180px;overflow:auto}.review-result button{margin-top:10px}.auth{margin:40px auto}.auth-intro h1{font-size:45px}
@media(max-width:1100px){#bank{grid-template-columns:repeat(2,minmax(0,1fr))}.main-content{padding:16px}#app{grid-template-columns:154px minmax(0,1fr)}}@media(max-width:700px){#app{display:block}.topbar{height:50px;padding:0 12px}.sidebar{padding:8px}.main-content{padding:14px 12px}.sidebar nav button{padding:8px;font-size:12px}.heading h1{font-size:22px}.panel{padding:15px}#bank{grid-template-columns:1fr 1fr;gap:7px}.set-card{padding:10px}.set-card .badge{font-size:10px}.set-card .card-actions{gap:5px}.set-card button{font-size:12px;padding:6px 8px}.question{padding:12px}#questionNumbers{grid-template-columns:repeat(10,minmax(0,1fr))}.quick-switch label{flex-basis:100%;font-size:12px}.wrong-tools{grid-template-columns:110px minmax(0,1fr)}}

#quizNavigation{position:sticky;top:0;z-index:30;background:var(--paper);padding:8px 0;border-bottom:1px solid var(--line);box-shadow:0 6px 10px #23314708}#quizNavigation .quiz-toolbar{margin-bottom:0}#quizNavigation .number-panel{margin-bottom:8px}#view-quiz .question{scroll-margin-top:calc(var(--quiz-nav-height,240px) + 12px)}@media(max-width:700px){#quizNavigation #questionNumbers{max-height:132px;overflow-y:auto;overscroll-behavior:contain}#quizNavigation .quick-switch{gap:5px}#quizNavigation .quick-switch label{margin:3px 0}}
.book-categories{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:12px 0}.book-categories button{text-align:left;display:flex;flex-direction:column;gap:5px;padding:12px}.book-categories b{font-size:13px;overflow-wrap:anywhere}.book-categories span{font-size:11px;color:var(--muted)}.book-categories .active{background:#eaf0ff;border-color:var(--blue)}.bank-management{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:12px 0;font-size:12px}.bank-management label,.set-select{display:flex;gap:7px;align-items:center;font-size:12px;margin:0}.bank-management input,.set-select input{width:auto;margin:0}.set-select{margin-bottom:8px}.danger-button{color:var(--danger);border-color:#e6c5c5}#chapterTabs{max-height:220px;overflow:auto}#chapterTabs small{opacity:.7;margin-left:5px}@media(max-width:900px){.book-categories{grid-template-columns:repeat(2,minmax(0,1fr))}}
.memory-controls{display:grid;grid-template-columns:minmax(190px,1.4fr) minmax(150px,1fr) minmax(140px,1fr) minmax(150px,1fr);gap:12px;margin-bottom:14px}.memory-controls label{margin:0;font-size:12px}.memory-controls input,.memory-controls select{margin-bottom:0}.memory-overview{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:12px;margin:12px 0 20px}.memory-overview .segmented{margin:0}.memory-position{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:14px 0;color:var(--muted);font-size:13px}.memory-flashcard{min-height:350px;background:linear-gradient(150deg,#fff,#f6f8fd);border:1px solid var(--line);border-radius:18px;text-align:center;padding:28px;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 12px 32px #23314708}.memory-flashcard.revealed{background:linear-gradient(150deg,#fff,#eff5ff)}.memory-flashcard>div{width:100%}.memory-word{font-size:clamp(25px,4vw,44px);font-weight:650;line-height:1.35;overflow-wrap:anywhere;margin:26px 0 16px}.memory-english{font-size:15px;line-height:1.7;color:var(--muted)}.memory-structure-img{display:block;max-width:100%;width:560px;height:280px;object-fit:contain;margin:12px auto;background:white;border-radius:12px}.memory-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:18px 0}.memory-actions button{min-width:125px}.memory-actions small{font-size:10px;opacity:.65;margin-left:5px}.memory-source{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;font-size:11px;margin:16px 0;color:var(--muted)}.memory-source a{color:var(--blue)}.memory-next{text-align:center;font-size:12px}.memory-footnote{font-size:12px;line-height:1.7;margin-top:20px}.memory-summary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.memory-summary-card h2{font-size:20px;line-height:1.5}.memory-summary-card ul{padding-left:19px;font-size:14px;line-height:1.9}.memory-summary-card li+li{margin-top:6px}.memory-mnemonic,.memory-pitfall{border-radius:8px;background:#f0f4ff;padding:12px 14px;font-size:13px;line-height:1.7;margin:12px 0}.memory-pitfall{background:#fff4e8}.memory-mnemonic p,.memory-pitfall p{margin:4px 0 0}.memory-summary-card .memory-source{justify-content:flex-start}.memory-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.memory-list-card summary{cursor:pointer;font-weight:600;line-height:1.6}.memory-list-card summary .muted{font-size:11px;font-weight:400;margin-left:10px}.memory-list-card .memory-word{font-size:24px}.memory-list-card .memory-structure-img{height:230px}.memory-list-answer{border-top:1px solid var(--line);margin-top:12px;text-align:center}.memory-view button:disabled{opacity:.4;cursor:default}@media(max-width:1100px){.memory-controls{grid-template-columns:repeat(2,minmax(0,1fr))}.memory-summary-grid{grid-template-columns:1fr}}@media(max-width:650px){.memory-list{grid-template-columns:1fr}.memory-flashcard{min-height:310px;padding:22px 14px}.memory-structure-img{height:240px}.memory-actions button{min-width:0;flex:1;padding:9px}.memory-actions small{display:none}.memory-position button{font-size:12px;padding:8px}.memory-controls{gap:8px}.memory-overview .segmented{flex-wrap:wrap}.memory-summary-card h2{font-size:18px}}

.memory-controls-summary{grid-template-columns:1.4fr 1fr 1.4fr}@media(max-width:1100px){.memory-controls-summary{grid-template-columns:repeat(2,minmax(0,1fr))}}
.memory-mode-label{display:flex;align-items:center;gap:7px;font-size:12px;margin:0}.memory-mode-label select{margin:0;width:auto;min-width:112px;padding:7px}.memory-choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}.memory-choice{display:flex;align-items:center;gap:12px;text-align:left;min-height:72px;line-height:1.6;padding:16px}.memory-choice-letter{flex-shrink:0;width:30px;height:30px;border-radius:8px;background:#edf0f8;display:grid;place-items:center;font-weight:700}.memory-choice.correct,.memory-quiz-result.correct{border-color:#8bc3a3;background:#edf8f1}.memory-choice.incorrect,.memory-quiz-result.incorrect{border-color:#dfa496;background:#fff1ec}.memory-view .memory-choice:disabled{opacity:1}.structure-choices .memory-choice{display:block;position:relative}.structure-choices .memory-choice-letter{position:absolute;top:10px;left:10px}.structure-choices .memory-structure-img{height:190px;width:100%;margin:15px 0 0}.memory-guess{margin:20px auto;max-width:680px}.memory-guess>div:first-of-type{display:flex;gap:10px;align-items:center}.memory-guess input{margin:0;min-width:0;flex:1}.memory-guess-tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:12px 0;font-size:12px}.memory-hint{letter-spacing:3px;line-height:1.8;overflow-wrap:anywhere}.memory-quiz-result{padding:20px;border:1px solid var(--line);border-radius:12px;margin:20px 0}.memory-result-answer .memory-word{font-size:25px;margin:15px 0}.memory-result-answer{text-align:center}.memory-quiz-result .memory-source{justify-content:flex-start}@media(max-width:650px){.memory-choice{padding:12px;font-size:12px;gap:8px}.structure-choices .memory-structure-img{height:150px}.memory-guess>div:first-of-type{flex-wrap:wrap}.memory-guess input{flex-basis:100%}.memory-mode-label{width:100%}}

/* Keep rapid recall controls reachable without scrolling. */
.memory-has-dock{padding-bottom:170px}
.memory-quick-dock{position:fixed;bottom:0;left:0;right:0;z-index:90;background:rgba(255,255,255,.98);border-top:1px solid #dce4e2;box-shadow:0 -6px 24px rgba(21,47,42,.08);padding:10px max(16px,env(safe-area-inset-right)) calc(10px + env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left));display:flex;align-items:center;justify-content:center;gap:24px}
.memory-quick-dock .memory-position{margin:0;gap:16px;flex:1;max-width:560px}
.memory-quick-dock .memory-position span{white-space:nowrap;text-align:center}
.memory-quick-dock .memory-actions,.memory-dock-answer{display:flex;gap:8px;margin:0;justify-content:center}
.memory-quick-dock button{min-height:44px;white-space:nowrap;touch-action:manipulation}
.memory-quick-dock .memory-actions button{min-width:110px}
.memory-dock-answer [data-memory="quiz-next"]{min-width:180px}
@media(max-width:900px){.memory-quick-dock{flex-direction:column;gap:8px}.memory-quick-dock .memory-position{width:100%;max-width:680px;flex:auto}.memory-quick-dock .memory-actions,.memory-dock-answer{width:100%;max-width:680px}.memory-quick-dock .memory-actions button,.memory-dock-answer button{flex:1;min-width:0;padding:10px 8px}.memory-quick-dock .memory-position button{padding:9px 12px}.memory-quick-dock small{display:none}}

.study-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:24px 0}.study-stats article{padding:22px}.study-stats strong{display:block;font-size:38px;margin:14px 0;color:#245d50}.study-stats strong small{font-size:15px;margin-left:8px}.study-stats .study-time{font-size:25px}.study-stats p{font-size:13px;color:#65756e}.study-stats progress,.study-badge progress{width:100%;height:7px;accent-color:#327963}.study-calendar{margin-bottom:28px}.study-calendar-grid{display:grid;grid-template-columns:repeat(14,minmax(0,1fr));gap:7px}.study-day{padding:10px 3px;border-radius:8px;text-align:center;background:#f0f3f1}.study-day span{display:block;font-size:10px}.study-day b{display:block;margin-top:5px;font-size:17px}.study-day.level-1{background:#d9eee3}.study-day.level-2{background:#9cd2b5}.study-day.level-3{background:#327963;color:white}.study-badges{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:28px}.study-badge{display:flex;gap:16px;align-items:flex-start}.study-badge>div{flex:1;min-width:0}.study-badge h3{margin:10px 0}.study-badge p{font-size:13px}.study-medal{font-size:38px;color:#81918a}.study-badge.unlocked{border-color:#87bba5;background:#f2faf5}.study-badge.unlocked .study-medal{color:#ac7d21}.study-table-wrap{overflow:auto}.study-records table{width:100%;border-collapse:collapse;text-align:left}.study-records th,.study-records td{padding:12px;border-bottom:1px solid #e5ebe7}.study-rules{font-size:12px;line-height:1.8;margin:20px 0}@media(max-width:1000px){.study-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.study-badges{grid-template-columns:repeat(2,minmax(0,1fr))}.study-calendar-grid{grid-template-columns:repeat(7,minmax(0,1fr))}}@media(max-width:550px){.study-stats{gap:10px}.study-stats article{padding:16px}.study-stats strong{font-size:30px}.study-stats .study-time{font-size:20px}.study-badges{grid-template-columns:1fr}.study-records th,.study-records td{padding:10px 5px;font-size:13px}}

.highlight-line{display:flex;align-items:flex-start;gap:10px;justify-content:space-between}.highlight-text{flex:1;min-width:0;user-select:text}.highlight-text mark{background:#ffe59a;color:inherit;padding:1px 0;border-radius:2px;box-decoration-break:clone}.highlight-line button{flex:none;padding:5px 9px;font-size:12px;color:#856118;border-color:#e3c977;background:#fffbeb;min-height:32px}.highlight-points li{margin:12px 0}.memory-mnemonic .highlight-line,.memory-pitfall .highlight-line{margin:10px 0}.personal-highlight-controls{display:grid;grid-template-columns:1fr 1fr 2fr;gap:16px}.personal-highlight-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.personal-highlight-card h2{font-size:19px}.personal-highlight-card blockquote{margin:16px 0;padding:14px 18px;border-left:4px solid #d6a537;background:#fffae9;line-height:1.8;white-space:pre-wrap;overflow-wrap:anywhere}.personal-highlight-card textarea{resize:vertical;width:100%}.personal-highlight-card .actions{flex-wrap:wrap}.personal-highlight-card label{font-size:13px}@media(max-width:850px){.personal-highlight-list{grid-template-columns:1fr}}@media(max-width:550px){.personal-highlight-controls{grid-template-columns:1fr 1fr}.personal-highlight-controls label:last-child{grid-column:1/-1}.highlight-line{flex-wrap:wrap}.highlight-line button{margin-left:auto}.highlight-text{flex-basis:100%}}

.memory-controls{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.memory-concept-prompt{font-size:22px;line-height:1.8;text-align:left;max-width:800px;margin:20px auto}.memory-concept-task{font-size:16px;color:#66756c}.memory-concept-details{text-align:left;max-width:840px;margin:18px auto;font-size:15px;line-height:1.8}.memory-concept-details h3{font-size:15px;color:#327963;margin:20px 0 8px}.memory-concept-details ul{padding-left:20px}.memory-concept-details li{margin:10px 0}.personal-highlight-controls{grid-template-columns:repeat(4,minmax(0,1fr))}@media(max-width:600px){.memory-concept-prompt{font-size:18px}.memory-controls{grid-template-columns:repeat(2,minmax(0,1fr))}.personal-highlight-controls{grid-template-columns:1fr 1fr}.personal-highlight-controls label:last-child{grid-column:auto}}
.memory-concept-prompt{white-space:pre-line}
/* Focused quick practice: essential controls first, detail on demand. */
.memory-heading h1{font-size:28px;margin-bottom:5px}.memory-heading p{margin:0}.memory-primary-controls{display:grid;grid-template-columns:1.1fr 1fr 1.4fr .7fr;gap:12px;margin:18px 0 10px}.memory-primary-controls label{font-size:12px;color:var(--muted);margin:0}.memory-primary-controls select{margin:5px 0 0;background:#fff}.memory-more-settings,.memory-reference-info{border:1px solid var(--line);border-radius:10px;background:#fff;padding:12px 16px;margin:10px 0}.memory-more-settings>summary,.memory-reference-info>summary{font-size:13px;cursor:pointer;color:var(--muted)}.memory-more-settings .memory-controls{padding-top:16px;margin-bottom:10px}.memory-secondary-actions{display:flex;gap:8px;flex-wrap:wrap}.memory-secondary-actions button{font-size:12px;padding:7px 12px}.memory-reference-info{margin-top:24px;background:transparent}.memory-reference-info ul,.memory-reference-info p{font-size:12px;line-height:1.9}.memory-view .memory-flashcard{min-height:220px;padding:22px 26px;box-shadow:none;background:#fff}.memory-view .memory-word{font-size:30px;margin:16px 0}.memory-view .memory-concept-prompt{max-width:820px;margin:auto;font-size:18px;line-height:1.9;text-align:left}.memory-view .memory-choice-grid{max-width:960px;margin:16px auto;gap:12px}.memory-view .memory-choice{padding:18px;text-align:left;align-items:center;min-height:72px;line-height:1.8;transition:background .12s,border-color .12s}.memory-pathology-img{display:block;max-width:100%;height:340px;object-fit:contain;margin:10px auto;border-radius:8px}.memory-choice .memory-pathology-img{height:200px;width:100%;margin:0}.memory-answer-title{font-size:21px;font-weight:650;margin-top:12px}.memory-explanation{font-size:15px;line-height:1.95;text-align:left;max-width:850px;margin:12px auto;color:var(--ink)}.memory-result-details{text-align:left;font-size:13px;margin-top:16px}.memory-result-details>summary{cursor:pointer;color:var(--muted)}.memory-photo-credit{font-size:11px;line-height:1.7;text-align:left;color:var(--muted);margin-top:16px}.memory-photo-credit p{margin:4px 0}.memory-photo-credit a{color:var(--blue)}.memory-dock-answer{display:flex;gap:8px}.memory-quick-dock{box-shadow:0 -4px 16px #2331470a}.memory-view .memory-guess{max-width:780px;margin:18px auto}.memory-guess textarea{width:100%;resize:vertical;min-height:100px}.memory-view .memory-overview{margin:12px 0}.memory-view .memory-quiz-result{padding:20px}.memory-view .memory-choice-letter{min-width:24px}
@media(max-width:900px){.memory-primary-controls{grid-template-columns:repeat(2,minmax(0,1fr))}.memory-pathology-img{height:300px}.memory-choice .memory-pathology-img{height:160px}}
@media(max-width:650px){.memory-heading h1{font-size:24px}.memory-primary-controls{gap:8px}.memory-primary-controls select{font-size:13px;padding:9px}.memory-view .memory-flashcard{padding:18px 14px;min-height:180px}.memory-view .memory-concept-prompt{font-size:16px;line-height:1.8}.memory-view .memory-choice-grid{grid-template-columns:1fr}.memory-view .structure-choices{grid-template-columns:repeat(2,minmax(0,1fr))}.memory-view .memory-choice{font-size:14px;padding:13px}.memory-choice .memory-pathology-img{height:140px}.memory-pathology-img{height:260px}.memory-more-settings,.memory-reference-info{padding:10px 12px}.memory-quick-dock .memory-position{font-size:11px}.memory-dock-answer button{padding:9px 12px;font-size:12px}}
.memory-auto-next{display:flex;align-items:center;gap:8px;font-size:13px;margin:10px 0}.memory-auto-next input{width:auto;margin:0}.chapter-hub-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:24px;margin-top:20px}.chapter-hub-list{display:flex;flex-direction:column;gap:8px;align-self:start;position:sticky;top:18px;max-height:75vh;overflow:auto}.chapter-hub-list button{text-align:left;display:flex;flex-direction:column;gap:3px;font-size:13px;padding:12px}.chapter-hub-list button span{font-size:11px;color:var(--muted)}.chapter-hub-list .active{border-color:var(--blue);background:#eef1ff}.chapter-hub-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:18px 0}.chapter-hub-grid h3{font-size:19px;margin-top:0}.chapter-hub-grid details summary{cursor:pointer;font-weight:600}.chapter-hub-grid li{margin:8px 0}.chapter-hub-tabs{margin:16px 0}.chapter-hub-tabs .active{background:var(--blue);color:#fff}@media(max-width:750px){.chapter-hub-layout{grid-template-columns:1fr;gap:14px}.chapter-hub-list{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));max-height:240px}.chapter-hub-grid{grid-template-columns:1fr}}

.rank-mine{margin:20px 0}.rank-mine h2{margin:8px 0}.rank-table{width:100%;border-collapse:collapse;min-width:480px}.rank-table td,.rank-table th{text-align:left;padding:15px 12px;border-bottom:1px solid #e6eaf0}.rank-self{background:#eef4ff}.rank-table td:nth-child(2){overflow-wrap:anywhere;max-width:200px}

.quick-wrong-filters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.quick-wrong-card{margin:16px 0}.quick-wrong-answer{white-space:pre-wrap;overflow-wrap:anywhere}[data-quick-wrong-events]{margin-top:12px;border-top:1px solid #e3e7ed;padding-top:8px}[data-quick-wrong-events] p{overflow-wrap:anywhere}@media(max-width:600px){.quick-wrong-filters{grid-template-columns:1fr}}
/* Case-led learning and calmer course navigation */
:root{--case-accent:#177c73;--case-soft:#edf7f4}.case-filters{display:grid;grid-template-columns:1fr 1.6fr 1.2fr;gap:14px}.case-filters label{font-size:12px;color:var(--muted)}.case-overview{display:flex;gap:18px;flex-wrap:wrap;align-items:center;background:var(--case-soft);border:1px solid #cde7df;border-radius:12px;padding:16px 20px;margin:10px 0 24px;color:#276357}.case-overview span{font-size:13px}.case-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.case-card{display:flex;flex-direction:column;gap:10px;padding:22px;box-shadow:0 3px 10px #23314703}.case-card h3{margin:4px 0;font-size:19px;line-height:1.6}.case-card p{margin:0;font-size:13px}.case-card .badge{align-self:start}.case-card button{margin-top:auto;align-self:start}.case-progress{color:var(--case-accent);padding-bottom:12px}.case-context{background:#fff;border:1px solid #cee1dc;border-top:4px solid var(--case-accent);border-radius:12px;padding:20px;margin:0}.case-context>summary{font-weight:650;color:var(--case-accent);font-size:15px}.case-vignette{white-space:pre-wrap;font-size:16px;line-height:1.95;margin:16px 0}.case-sources{font-size:12px;line-height:1.7}.case-sources li{margin:10px 0;overflow-wrap:anywhere}.case-sources ul{padding-left:18px}.case-sources p{margin:6px 0}.case-context.compact{margin:0 0 18px;padding:14px;border-top-width:2px}.case-context.compact .case-vignette{font-size:14px}#caseWorkspace.active{display:grid;grid-template-columns:minmax(260px,.9fr) minmax(0,1.35fr);gap:24px;align-items:start;padding:20px 0}#caseWorkspace.active #caseReading{position:sticky;top:calc(var(--quiz-nav-height,180px) + 12px);max-height:calc(100vh - var(--quiz-nav-height,180px) - 35px);overflow:auto}#caseWorkspace.active .question{margin:0;min-height:350px}#caseWorkspace.active .question h3{font-size:20px}#caseControls{position:sticky;bottom:0;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fffffff5;backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:12px;padding:12px 18px;z-index:32;box-shadow:0 -5px 20px #23314708}.case-auto{display:flex;align-items:center;gap:8px;font-size:13px;margin:0}.case-auto input{width:auto;margin:0}#quizNavigation.case-navigation .quick-switch{display:none}#quizNavigation.case-navigation #questionNumbers{grid-template-columns:repeat(10,minmax(30px,1fr));max-width:660px}#quizNavigation.case-navigation .number-panel{border:0;padding:4px 0;margin:0 0 8px}#quizNavigation.case-navigation .quiz-toolbar{justify-content:space-between}#quizNavigation.case-navigation .quiz-toolbar button{min-width:120px}.memory-full-term{overflow-wrap:anywhere;line-height:1.5;font-size:clamp(21px,2.6vw,30px)!important}.chapter-hub-tabs{display:flex;flex-wrap:wrap;gap:7px;border:0}.chapter-hub-tabs button{border-radius:9px}.chapter-hub-list{scrollbar-width:thin}.chapter-hub-grid .panel{box-shadow:0 3px 9px #23314703}.chapter-hub-list .active{box-shadow:inset 3px 0 var(--blue)}button:focus-visible,a:focus-visible{outline:3px solid #8294ef;outline-offset:3px}.option:has(input:focus-visible){outline:2px solid #8294ef}.option:has(input:checked){border-color:#778be6;background:#f0f3ff}.option.correct:has(input:checked){background:#ebf7f1;border-color:#8dbda6}.option.wrong:has(input:checked){background:#fff0ee;border-color:#d8a097}
@media(max-width:1150px){.case-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}#caseWorkspace.active{grid-template-columns:minmax(240px,.8fr) minmax(0,1.2fr);gap:15px}}@media(max-width:850px){#caseWorkspace.active{grid-template-columns:1fr}#caseWorkspace.active #caseReading{position:static;max-height:none}.case-context .case-vignette{max-height:230px;overflow:auto}.case-filters{grid-template-columns:1fr 1fr}.case-filters label:last-child{grid-column:1/-1}.case-card-grid{grid-template-columns:1fr}.case-overview{gap:8px 16px}.case-auto{font-size:12px}#caseControls{padding:10px;gap:8px}#caseControls button{font-size:13px;padding:9px}#quizNavigation.case-navigation .quiz-toolbar button{min-width:0}.case-practicing .main-content{padding-top:18px}#quizNavigation.case-navigation #questionNumbers{gap:4px}#quizNavigation.case-navigation #questionNumbers button{padding:7px 0;min-width:0}}

.memory-image-option{min-width:0;display:flex;flex-direction:column;gap:7px}.memory-image-option>.memory-choice{width:100%;flex:1}.memory-image-zoom{text-align:center;font-size:12px;color:var(--blue);padding:7px}.structure-choices .memory-image-option .memory-structure-img{height:260px}@media(max-width:650px){.structure-choices .memory-image-option .memory-structure-img{height:200px}}

/* Paper state uses text, color and border so completed sets remain distinguishable. */
.paper-progress{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;margin:12px 0;font-size:.88rem;color:#506176}.paper-state{font-weight:700;border-radius:7px;padding:5px 9px;background:#edf0f4;color:#536070}.paper-state.completed{background:#def3e7;color:#196344}.paper-state.active{background:#e2eeff;color:#2156a2}.paper-updated{background:#fff0cd;color:#805711;padding:5px 9px;border-radius:7px;font-weight:600}.set-card.paper-completed,.panel.paper-completed{border-left:4px solid #4caa7c;background:linear-gradient(125deg,#f1faf5,#fff 65%)}.set-card.paper-active,.panel.paper-active{border-left:4px solid #6296dd}.paper-progress+button{margin:4px 6px 4px 0}