:root{--bg:#f5f5f0;--card:#fff;--ink:#233c38;--muted:#687770;--line:#dce3dd;--accent:#245b50;--soft:#e7eee7;--gold:#bb7937;--bad:#a3423d}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select{font:inherit}button,a,input,select{ -webkit-tap-highlight-color:transparent}a{color:inherit}button,.button{border:1px solid var(--line);border-radius:10px;background:white;padding:11px 18px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;color:var(--ink);font-weight:600}button:hover,.button:hover{border-color:var(--accent);background:var(--soft)}button:disabled{opacity:.45;cursor:not-allowed}.primary{background:var(--accent);color:white;border-color:var(--accent)}.primary:hover{background:#173f36;color:white}.ghost{background:transparent}.small{padding:7px 12px;font-size:14px}:focus-visible{outline:3px solid 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p{font-size:11px;color:var(--muted)}.dot{display:inline-block;background:#8ca389;width:7px;height:7px;border-radius:50%;margin-right:8px}.workspace{margin-left:245px}header{min-height:88px;display:flex;align-items:center;justify-content:space-between;padding:20px 5%;border-bottom:1px solid var(--line);gap:20px}.breadcrumb{font-size:10px;letter-spacing:1.4px;color:var(--muted)}.breadcrumb span{margin:0 13px;opacity:.5}.profile{font-size:12px;color:var(--muted);display:flex;gap:10px;align-items:center}select,input[type=number]{border:1px solid var(--line);background:#fff;padding:10px;border-radius:8px;color:var(--ink);max-width:100%}main{max-width:1240px;margin:auto;padding:45px 5% 60px;min-height:75vh}.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;font-weight:650;color:var(--accent);margin:0 0 16px}h1{font:normal clamp(30px,3.7vw,46px)/1.16 Georgia,serif;letter-spacing:-1px;margin:0 0 16px}h2{font-size:21px;line-height:1.35;margin:0 0 12px}h3{font-size:17px;line-height:1.45;margin:0 0 10px}p{margin:0 0 16px}.muted{color:var(--muted)}.intro{max-width:680px}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:30px;align-items:center;background:#e8eee5;border:1px solid #d8e2d4;border-radius:20px;padding:35px;margin:28px 0}.hero h2{font:31px/1.25 Georgia}.hero .path{display:flex;flex-direction:column;gap:16px;padding:25px;background:#ffffff90;border-radius:14px}.path div{display:flex;align-items:center;gap:15px;font-size:14px}.path i{font-style:normal;border:1px solid #b4c6b8;border-radius:50%;width:31px;height:31px;display:grid;place-items:center}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid.two{grid-template-columns:repeat(2,1fr)}.card{padding:25px;background:var(--card);border:1px solid var(--line);border-radius:15px}.card .number{font:33px Georgia}.card 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p{line-height:1.8}.reading h2{margin-top:30px}.reading h3{margin-top:22px}.tablewrap{overflow:auto;margin:18px 0}table{border-collapse:collapse;width:100%;font-size:14px}td,th{padding:13px;text-align:left;border:1px solid var(--line);vertical-align:top}th{background:var(--soft)}details{margin:15px 0}summary{cursor:pointer;font-weight:650;padding:12px 0}.question{max-width:850px;margin:25px auto}.question h2{font-size:23px;line-height:1.5;margin:24px 0}.options{display:grid;gap:11px}.option{width:100%;justify-content:flex-start;text-align:left;font-weight:400;padding:17px}.option .letter{border:1px solid var(--line);border-radius:6px;min-width:29px;height:29px;display:grid;place-items:center;font-size:12px}.option.selected{border-color:var(--accent);background:var(--soft)}.option.correct{border-color:#448461;background:#edf6ee}.option.wrong{border-color:#bf7770;background:#fff2ef}.question-nav{display:flex;flex-wrap:wrap;gap:7px;margin-top:24px}.question-nav button{width:36px;height:36px;padding:0;font-size:12px}.question-nav .answered{background:var(--soft)}.question-nav .current{outline:2px solid var(--accent)}.question-nav .flagged{border-bottom:4px solid var(--gold)}progress{width:100%;height:6px;accent-color:var(--accent);display:block}.feedback{padding:20px;border-radius:10px;background:var(--soft);margin-top:20px}.feedback.bad{background:#fff0eb}.feedback p:last-child{margin:0}.recall-mode{--bg:#f1f4ed;--card:#fcfdf8;--accent:#536c55;--soft:#e3ebdc}.recall-hero{border-left:3px solid #a4b797;padding-left:24px;margin-bottom:32px}.session-top{display:flex;align-items:center;justify-content:space-between;gap:15px}.clock{font-variant-numeric:tabular-nums;white-space:nowrap}.resultnum{font:64px Georgia;margin:15px 0}.error{color:var(--bad)}footer{font-size:11px;color:var(--muted);padding:25px 5%;border-top:1px solid 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.matchrow{display:grid;grid-template-columns:1.6fr 1fr;gap:18px;align-items:center}.matchrow p{margin:0;color:var(--ink);font-size:16px}.matchrow select{width:100%}.matchrow .feedback{grid-column:1/-1;margin:0}@media(max-width:650px){.matchrow{grid-template-columns:1fr;gap:8px}}
/* Unified study space */
:root{--bg:#f6f7f4;--ink:#253d39;--accent:#285e53;--line:#dfe6e0}.card{border-radius:18px;box-shadow:0 3px 16px #263d3905}h1{letter-spacing:-1.5px}header{gap:16px;flex-wrap:wrap}.breadcrumb{flex:1}.quiet-quote{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:14px;color:var(--muted);margin:20px 0;min-height:36px}.quiet-quote button{font-size:12px;flex-shrink:0}.gate .sidebar,.gate header,.gate footer{display:none}.gate .workspace{margin:0}.gate main{max-width:960px;margin:8vh auto;padding:32px}.entrance{text-align:left;display:block;padding:30px;min-height:210px}.entrance h2{margin:12px 0}.entrance .icon{display:inline-flex}.entrance:hover{background:#edf3ec;box-shadow:0 8px 28px #283d3910}.recall-mode{--bg:#f4f4e9;--card:#fffef9;--soft:#e6eddf;--accent:#446a53}.recall-mode .question{background:#fffef9;border-radius:22px}.recall-hero{background:transparent;border:0}.answer-line{padding:12px 16px;border-radius:10px;border:1px solid var(--line)}.answer-good{background:#e4f3e8;color:#155c32;border:1px solid #8fc49d;padding:12px 16px;border-radius:10px}.answer-bad{background:#fce9e7;color:#972d2c;border:1px solid #dda29b;padding:12px 16px;border-radius:10px}.correction h3{white-space:pre-line}.correction .feedback{margin-top:22px}.session-top .row{flex-wrap:wrap}.chapter-origin{font-size:13px}dialog{max-width:min(560px,92vw);border:1px solid var(--line);border-radius:20px;padding:30px;color:var(--ink);box-shadow:0 20px 80px #0003}dialog::backdrop{background:#183b354d;backdrop-filter:blur(3px)}#chapterCards{display:block}#chapterCards .card{margin:10px 0;padding:20px 24px;display:grid;grid-template-columns:1fr auto;gap:2px 24px}#chapterCards h2{font-size:21px;margin:6px 0!important}#chapterCards button{grid-column:2;grid-row:1/4;align-self:center}#chapterCards .tag{justify-self:start}#chapterCards p{margin:6px 0}.question .options{margin-top:26px}.question h2{font-size:clamp(20px,2.5vw,27px)}.question-jumps{margin-top:26px}details>summary{cursor:pointer}button,.button,.card.link{transition:background .18s,border-color .18s,box-shadow .18s}main{animation:arrive .18s ease-out}@keyframes arrive{from{opacity:.8;transform:translateY(3px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media(max-width:650px){.gate main{margin:3vh auto;padding:22px}.gate .grid{grid-template-columns:1fr}.entrance{min-height:150px;padding:24px}header{padding:16px!important}.breadcrumb{flex-basis:100%}.quiet-quote{align-items:flex-start}#chapterCards .card{display:block}#chapterCards button{margin-top:10px}.session-top{display:block}.session-top .row{margin-top:15px}.question{padding:20px!important}h1{font-size:34px}.card{border-radius:14px}.row{flex-wrap:wrap}.answer-line{overflow-wrap:anywhere}}