*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-ui);font-size:15px;line-height:1.65}button,input,select,textarea{font:inherit}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:42px;padding:8px 16px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--ink);cursor:pointer;text-decoration:none;transition:background .16s,border-color .16s}button:hover,.button:hover{background:var(--mint);border-color:#91b5a7}button:disabled{opacity:.4;cursor:default}button:focus-visible,a:focus-visible,textarea:focus-visible,select:focus-visible,.button:focus-visible{outline:3px solid #eda94c;outline-offset:3px}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:#086451;color:white}.quiet{border-color:transparent;background:transparent}.muted{color:var(--muted);font-size:13px}h1,h2,h3,p{margin-top:0}h2{font-size:21px;line-height:1.45}h3{font-size:17px}.topbar{max-width:1480px;margin:auto;padding:25px 40px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}#brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:650;font-size:19px;line-height:1.4}#brand small{display:block;font-size:11px;letter-spacing:.1em;color:var(--muted);font-weight:400;margin-top:3px}.brand-symbol{display:grid;place-items:center;width:42px;height:46px;background:var(--ink);color:#fafbf8;font-family:var(--serif);font-size:27px;border-radius:5px}.top-actions{display:flex;align-items:center;gap:5px;font-size:13px}#saveState{font-size:11px;color:var(--muted);margin-right:12px}main{max-width:1400px;padding:0 40px;margin:auto}.intro{padding:58px 0 36px;position:relative}.eyebrow{font-size:12px;color:var(--green);letter-spacing:.16em;margin-bottom:16px}h1{font-family:var(--serif);font-weight:600;font-size:43px;line-height:1.5;letter-spacing:.02em;margin-bottom:18px}.stats{position:absolute;right:0;bottom:48px;display:flex;gap:42px}.stat strong{display:block;font-size:32px;font-weight:500;font-variant-numeric:tabular-nums}.stat span{font-size:12px;color:var(--muted)}.mode-tabs{border-bottom:1px solid var(--line);display:flex;gap:28px}.mode-tabs button{border:0;background:none;padding:14px 0;border-radius:0;color:var(--muted);font-size:17px;border-bottom:3px solid transparent}.mode-tabs button[aria-pressed=true]{color:var(--ink);border-bottom-color:var(--green);font-weight:650}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:15px;margin:27px 0 15px}.section-heading h2{margin:0;font-size:17px}#paperList{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:42px}.paper-row{display:grid;grid-template-columns:42px 1fr auto;align-items:center;gap:14px;border-bottom:1px solid var(--line);padding:19px 0}.paper-index{font-size:13px;color:#8ba198;font-variant-numeric:tabular-nums}.paper-title{font-size:16px;font-weight:550;margin-bottom:4px}.paper-row button{padding:7px 12px}.paper-row small{color:var(--muted);font-size:11px}.filter-line{display:flex;align-items:flex-start;gap:25px;margin:24px 0}.filter-name{min-width:70px;font-size:13px;color:var(--muted);padding-top:8px}.chips{display:flex;flex-wrap:wrap;gap:8px}.chips button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.chips button{font-size:13px;min-height:38px;padding:7px 15px}select{max-width:100%;padding:9px 35px 9px 14px;background:white;color:var(--ink);border:1px solid var(--line);border-radius:7px;min-width:250px}.start-row{display:flex;align-items:center;gap:24px;padding:22px 0;border-top:1px solid var(--line);margin-top:30px}.start-row>span{flex:1}.start-row label{font-size:13px;color:var(--muted)}input[type=checkbox]{accent-color:var(--green)}.resume{width:100%;justify-content:space-between;margin-top:30px;background:var(--mint);border:0;padding:17px 20px}footer{margin:50px auto 0;padding:25px 20px;text-align:center;color:var(--muted);font-size:11px;border-top:1px solid var(--line)}#notice{position:sticky;top:8px;margin:10px auto;padding:12px 20px;border:1px solid #d6b87f;background:#fff6e6;z-index:10;max-width:750px;border-radius:8px}.practice-bar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:22px 0 15px}.practice-bar>div{flex:1}.practice-bar strong{font-size:14px}.practice-bar span{margin-left:15px;font-variant-numeric:tabular-nums}.progress-track{height:3px;background:var(--line);margin-bottom:25px}.progress-track>div{height:100%;background:var(--green);transition:width .2s}#outline{display:flex;flex-wrap:wrap;gap:7px;padding:15px 0;max-height:220px;overflow:auto}#outline button{font-size:12px;min-width:47px;padding:6px 9px;min-height:35px}#outline button.done{background:var(--mint)}#outline button.current{border:2px solid var(--green)}.workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:46px;align-items:start}.workspace.no-reading{grid-template-columns:1fr;max-width:850px;margin:auto}#readingPane{border-right:1px solid var(--line);padding-right:35px}.reading-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);margin-bottom:22px}.reading-head h2{font-size:15px;margin:0}.reading-head button{font-size:12px}.prose{font-size:16px;line-height:1.95;overflow-wrap:anywhere}.prose p{margin:0 0 1em;white-space:normal}.prose h1{font-family:var(--font-ui);font-size:20px;text-align:center;line-height:1.6;margin:20px 0}.prose h2{font-size:19px;line-height:1.6;margin:20px 0 14px}.prose h3{font-size:17px;margin:15px 0 10px}.prose ul,.prose ol{padding-left:23px}.prose img{max-width:100%;height:auto;display:block;margin:15px auto;cursor:zoom-in}.prose table{width:100%;border-collapse:collapse;font-size:14px;overflow-wrap:anywhere}.prose th,.prose td{border:1px solid var(--line);padding:8px}.prose u{text-decoration-thickness:1px;text-underline-offset:4px}.prose blockquote{margin:12px 0;padding:12px 18px;background:#eef2ec;border-left:3px solid #95af9c}.prose code{font-family:inherit;background:transparent}.question-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--muted);font-size:12px}.question-meta button{font-size:12px;padding:7px 9px}#questionHeading{font-size:24px;margin:13px 0 18px}.option{display:flex;align-items:flex-start;text-align:left;width:100%;margin:10px 0;padding:14px 17px;gap:14px;line-height:1.8;border-radius:8px}.option .letter{flex:0 0 25px;height:25px;line-height:25px;margin-top:3px;text-align:center;border:1px solid var(--line);border-radius:5px;font-size:12px}.option .prose{font-size:15px;flex:1}.option .prose p:last-child{margin:0}.option.selected{border-color:var(--green);background:var(--mint)}.option.correct{border-color:var(--green);background:#e7f4eb}.option.incorrect{border-color:#c56e51;background:#fff0e9}.option.selected .letter{background:var(--green);color:white}.answer-actions{display:flex;gap:10px;margin:20px 0}.answer-actions button{flex:1}#draftLabel{display:block;font-size:13px;color:var(--muted);margin:24px 0 10px}textarea{display:block;width:100%;min-height:170px;resize:vertical;padding:16px;background:#fff;border:1px solid #b8cbc1;border-radius:8px;color:var(--ink);font-size:16px;line-height:1.8}#draftInfo{margin-top:6px;font-size:11px}#answerPanel{padding:23px 0;border-top:1px solid var(--line)}#result{font-weight:650;margin-bottom:16px;color:var(--green)}#selfGrade{margin-top:24px;padding:18px;background:var(--mint);border-radius:9px}#selfGrade p{margin-bottom:10px;font-size:13px}summary{cursor:pointer;font-size:13px;color:var(--green);padding:12px 0}.notes{border-top:1px solid var(--line);margin-top:20px}.notes textarea{min-height:95px}.question-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:25px;padding:18px 0;position:sticky;bottom:0;background:var(--paper);border-top:1px solid var(--line);z-index:2}#completionState{font-size:11px;text-align:center}#finish{margin:30px 0;padding:30px;background:var(--mint);border-radius:12px}#finish button{margin-right:10px}.question-notice{padding:10px 14px;background:#fff4dc;border-left:3px solid var(--orange);margin:15px 0;font-size:13px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}[hidden]{display:none!important}#star[aria-pressed=true]{color:#a25b00}#translation{padding-top:15px}
@media(min-width:1100px){#reading{max-height:calc(100vh - 240px);min-height:420px;overflow:auto;padding-right:15px;overscroll-behavior:contain}#readingPane{position:sticky;top:20px}}
@media(max-width:850px){.topbar{padding:18px 20px;align-items:flex-start}.top-actions{flex-wrap:wrap;justify-content:flex-end;gap:0}#saveState{width:100%;text-align:right;margin:0;font-size:10px}.top-actions button,.top-actions .button{font-size:11px;padding:6px 9px;min-height:32px}main{padding:0 20px}.intro{padding:36px 0 26px}h1{font-size:34px}.stats{position:static;margin-top:25px;gap:35px}.stat strong{font-size:26px}#paperList{grid-template-columns:1fr}.workspace{grid-template-columns:1fr;gap:24px}#readingPane{border-right:0;padding:0;border-bottom:1px solid var(--line)}#reading{max-height:50vh;overflow:auto;padding-right:5px}#readingPane.reading-collapsed #reading{display:none}.practice-bar{flex-wrap:wrap}.practice-bar>div{order:3;flex-basis:100%;display:flex;justify-content:space-between}.question-footer{padding-bottom:max(16px,env(safe-area-inset-bottom))}.filter-line{gap:12px}.filter-name{min-width:58px;font-size:12px}.chips{gap:7px}.chips button{padding:6px 11px}.start-row{flex-wrap:wrap;gap:16px}.start-row>span{flex-basis:100%}.start-row>.primary{flex:1}.section-heading{align-items:flex-start;flex-direction:column;gap:5px}.paper-row{grid-template-columns:25px 1fr auto;gap:8px}.paper-title{font-size:15px}.prose{font-size:16px}#brand{font-size:16px}.brand-symbol{width:34px;height:39px;font-size:23px}.topbar{gap:8px}.top-actions{max-width:48%}.intro>.muted{font-size:12px}.filter-line select{min-width:0;width:100%}#questionHeading{font-size:22px}.option{padding:12px;gap:10px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.emphasis{text-emphasis:filled dot;text-emphasis-position:under;-webkit-text-emphasis:filled dot;-webkit-text-emphasis-position:under}u.wave{text-decoration-style:wavy}
.prose pre{white-space:pre-wrap;overflow-wrap:anywhere;font-family:inherit;max-width:100%}.prose pre code{font:inherit}.blank{white-space:nowrap;display:inline-block;font-family:var(--font-ui);max-width:100%;vertical-align:baseline}
.question-footer{position:static}
#imageDialog{max-width:95vw;max-height:95vh;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}#imageDialog::backdrop{background:#173c3788}#largeImage{display:block;max-width:85vw;height:auto;margin:15px auto}#closeImage{position:sticky;top:0;float:right}

@media(max-width:850px){.question-meta{flex-wrap:wrap;gap:4px 10px}#questionSource{flex:1 1 100%}#originalPaper,#star{white-space:nowrap;min-height:36px}#originalPaper{padding-left:0}#star{margin-left:auto}}