@import url('data:text/css,');
:root{--ink:#22372f;--muted:#78847e;--paper:#f5f7f3;--line:#e2e8e0;--accent:#168765;--soft:#e5f2e9;--radius:22px;font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:4px}h1,h2,h3,p{margin:0}h1{font-size:38px;letter-spacing:-1.3px;line-height:1.2;font-weight:650}h2{font-size:23px;letter-spacing:-.5px}h3{font-size:17px}p{color:var(--muted)}.shell{display:flex;min-height:100vh}.sidebar{width:238px;flex-shrink:0;padding:33px 23px 24px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{font-size:26px;letter-spacing:3px;font-weight:700;display:flex;align-items:center;gap:9px}.brand-mark{display:grid;place-items:center;width:37px;height:39px;border-radius:13px 13px 4px 13px;color:white;background:#244f3c;font-family:Georgia,serif;font-size:32px;font-style:italic;letter-spacing:0}.beta{font-size:8px;letter-spacing:1px;background:#edf4e8;color:#688260;padding:3px 5px;border-radius:4px}.workspace-label{font-size:9px;letter-spacing:1.7px;color:#9aa49c;margin:53px 0 17px}nav{display:grid;gap:9px}nav a{padding:12px;border-radius:12px;color:#69776e;font-size:13px}nav a span{font-size:20px;display:inline-block;width:29px;vertical-align:middle}nav a.active{background:#eaf3eb;color:#2a6544;font-weight:600}.side-note{margin-top:auto;background:#f5f7ef;border:1px solid #e4eadb;padding:18px;border-radius:16px}.side-note strong{display:block;font-size:13px}.side-note p{font-size:11px;line-height:1.65;margin-top:7px}.seed{font-size:30px;color:#8ca16e}.local-note{margin-top:25px;font-size:10px;color:#67756a}.local-note i{display:inline-block;width:6px;height:6px;background:#96b386;border-radius:50%;margin-right:5px}.local-note p{font-size:10px;margin:6px 0 0 12px}.main-wrap{min-width:0;flex:1}header{height:89px;padding:0 40px;display:flex;align-items:center;justify-content:space-between;gap:15px;border-bottom:1px solid var(--line);font-size:12px;background:#f9faf7}.crumb{color:#8b958d}.slash{margin:0 15px;color:#bbc3ba}.profile{display:flex;align-items:center;gap:10px}.avatar{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:#e7e8d8;color:#75815e}.profile select{max-width:205px;border:0;background:transparent;font-size:11px;color:#5e6f62}main{max-width:1450px;margin:auto;padding:36px 40px 50px;min-height:calc(100vh - 145px)}footer{border-top:1px solid var(--line);padding:20px 40px;display:flex;justify-content:space-between;font-size:10px;color:#879487}.eyebrow{color:var(--accent);font-size:10px;font-weight:650;letter-spacing:2px;text-transform:uppercase;margin-bottom:11px}.heading{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:26px}.heading p{margin-top:12px;max-width:600px;font-size:13px}.badge{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:30px;padding:7px 12px;font-size:10px;background:#fff;color:#6f7f6e;white-space:nowrap}.badge.dot:before{content:'';width:6px;height:6px;border-radius:50%;background:#82a568}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:24px}.stat{border:1px solid var(--line);border-radius:15px;padding:15px 19px;background:#fff;display:flex;align-items:center;gap:14px}.stat .stat-icon{background:var(--soft);color:var(--accent);border-radius:10px;width:36px;height:36px;display:grid;place-items:center;font-size:20px}.stat strong{font-size:21px;line-height:1.2;display:block}.stat small{color:var(--muted);font-size:10px}.tree-layout{display:grid;grid-template-columns:minmax(0,1fr) 275px;gap:20px}.garden{position:relative;background:radial-gradient(ellipse at 50% 55%,#eef6e8 0,transparent 60%),#fbfcf8;border:1px solid #dce6d9;border-radius:24px;padding:24px;overflow:hidden;min-height:540px}.garden-head{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#75846e}.garden-head strong{font-weight:600;color:#4c6346}.live-dot{height:5px;width:5px;display:inline-block;background:#739f69;border-radius:50%;margin-right:6px}.tree-scene{height:430px;position:relative;max-width:760px;margin:auto}.tree-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.branch-node{position:absolute;width:144px;text-align:center;transform:translateX(-50%);border:0;background:transparent;padding:4px;z-index:2}.branch-node[data-group=code]{left:18%;top:57px;--node:#467cf1}.branch-node[data-group=quant]{left:44%;top:13px;--node:#239d74}.branch-node[data-group=language]{left:77%;top:63px;--node:#9b6bd5}.branch-node[data-group=science]{left:69%;top:226px;--node:#d29141}.orb{height:67px;width:67px;border-radius:50%;background:#fff;display:grid;place-items:center;margin:0 auto 12px;color:var(--node);font-size:25px;border:1px solid color-mix(in srgb,var(--node) 40%,white);box-shadow:0 0 0 8px color-mix(in srgb,var(--node) 6%,transparent),0 0 25px color-mix(in srgb,var(--node) 20%,transparent);transition:.25s}.branch-node:hover .orb,.branch-node.selected .orb{background:var(--node);color:white;box-shadow:0 0 0 9px color-mix(in srgb,var(--node) 12%,transparent),0 0 30px color-mix(in srgb,var(--node) 30%,transparent);transform:translateY(-3px)}.branch-node strong{font-size:11px;display:block;line-height:1.4}.branch-node small{font-size:9px;color:#8b9784;display:block;margin-top:4px}.root-node{position:absolute;bottom:7px;left:42%;transform:translateX(-50%);text-align:center}.root-disc{background:#2c4a35;color:white;height:64px;width:64px;display:grid;place-items:center;border-radius:50%;margin:auto;box-shadow:0 0 0 8px #e4ebdc;font-size:24px;font-family:Georgia,serif;font-style:italic}.root-node small{font-size:9px;letter-spacing:1.5px;display:block;margin-top:14px;color:#83927a}.leaf-dot{fill:#91b88c;opacity:.5}.garden-tip{font-size:10px;text-align:center;color:#94a08a}.branch-panel{background:white;border:1px solid var(--line);border-radius:22px;padding:23px;min-width:0}.panel-icon{background:var(--soft);color:var(--accent);font-size:25px;display:grid;place-items:center;width:50px;height:50px;border-radius:15px;margin-bottom:17px}.branch-panel h2{font-size:19px;line-height:1.3}.branch-panel p{font-size:11px;margin-top:8px}.subject-list{display:grid;gap:8px;margin-top:20px;max-height:330px;overflow:auto}.subject-row{display:flex;align-items:center;text-align:left;background:#fafbf9;border:1px solid #edf0e9;padding:11px 10px;border-radius:11px;gap:10px}.subject-row:hover{border-color:var(--accent);background:var(--soft)}.mini-icon{font-size:16px;color:var(--accent);width:28px}.subject-row strong{font-size:11px;display:block}.subject-row small{font-size:9px;color:#8b958a}.arrow{margin-left:auto;color:#93a18d}.section-head{display:flex;justify-content:space-between;align-items:center;margin:29px 0 15px}.section-head h2{font-size:18px}.text-link{font-size:11px;color:var(--accent)}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.card{background:white;border:1px solid var(--line);border-radius:18px;padding:22px;display:flex;flex-direction:column;min-width:0;transition:border-color .2s}.card:hover{border-color:color-mix(in srgb,var(--accent) 45%,white)}.card-top{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:17px}.tag{font-size:9px;color:var(--accent);background:var(--soft);padding:4px 8px;border-radius:6px}.card h3{font-size:16px;line-height:1.35}.card p{font-size:11px;margin:9px 0 17px}.card .bottom{margin-top:auto;padding-top:15px;border-top:1px solid #edf0e9;display:flex;justify-content:space-between;font-size:10px;color:#7f8b7b}.pill-icon{font-size:22px;color:var(--accent)}.primary,.secondary{border-radius:11px;padding:11px 17px;font-size:12px;font-weight:550;display:inline-flex;justify-content:center;align-items:center;gap:8px}.primary{border:1px solid var(--accent);background:var(--accent);color:white}.secondary{border:1px solid var(--line);background:white}.primary:hover{filter:brightness(.94)}.secondary:hover{background:var(--soft)}.filters{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:23px}.filters input,.filters select{border:1px solid var(--line);border-radius:11px;padding:11px 14px;background:#fff;color:var(--ink);min-width:0}.filters input{flex:1;min-width:160px}.filters select{font-size:12px;max-width:100%}.notice{padding:13px 17px;border:1px solid #e4e8d8;border-radius:12px;background:#f3f5e9;color:#7a8164;font-size:11px;margin:20px 0}.back{font-size:12px;color:var(--muted);display:inline-block;margin-bottom:20px}.course-layout{display:grid;grid-template-columns:1fr 290px;gap:23px}.lesson-list{display:grid;gap:9px}.lesson-row{display:flex;align-items:center;gap:16px;padding:17px 20px;border:1px solid var(--line);background:white;border-radius:13px}.lesson-row:hover{border-color:var(--accent)}.lesson-num{font-size:12px;width:35px;height:35px;border-radius:50%;background:var(--soft);color:var(--accent);display:grid;place-items:center}.lesson-row h3{font-size:13px}.lesson-row p{font-size:10px;margin-top:4px}.book-mini{display:block;padding:13px 0;border-bottom:1px solid var(--line);font-size:12px}.book-mini small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.paper{background:white;border:1px solid var(--line);border-radius:20px;padding:30px;margin-bottom:18px}.reading{font-family:Georgia,'Times New Roman',serif;font-size:21px;line-height:1.8;color:#394b3d;white-space:pre-wrap;margin:20px 0}.lesson-body{max-width:850px;margin:auto}.lesson-body .heading{margin-bottom:25px}.step-label{font-size:9px;color:var(--accent);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:10px}.quiz-options{display:grid;gap:10px;margin:20px 0}.quiz-option{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:11px;padding:13px 15px;font-size:14px;cursor:pointer}.quiz-option:has(input:checked){background:var(--soft);border-color:var(--accent)}input[type=radio]{accent-color:var(--accent)}.quiz-result{background:var(--soft);border-radius:14px;padding:20px;margin:15px 0}.quiz-result p{color:#4e6557;margin-top:8px;font-size:13px}textarea{width:100%;min-height:130px;padding:15px;border:1px solid var(--line);border-radius:12px;margin:17px 0;resize:vertical}.muted{font-size:11px;color:var(--muted)}.rubric{font-size:12px;color:var(--muted);padding-left:19px}.book-cover{height:145px;background:linear-gradient(130deg,var(--accent),color-mix(in srgb,var(--accent) 55%,#203a31));border-radius:6px 13px 13px 6px;border-left:9px solid #ffffff26;padding:19px;color:white;display:flex;flex-direction:column;justify-content:space-between;margin-bottom:19px;box-shadow:3px 5px 12px #15362212}.book-cover small{font-size:8px;letter-spacing:1.5px;text-transform:uppercase;color:#ffffffbc}.book-cover strong{font-family:Georgia,serif;font-size:18px;font-weight:400;line-height:1.25}.book-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}.book-actions a{font-size:10px;padding:8px 10px}.book-card .license{font-size:9px;line-height:1.45;margin-bottom:16px}.book-card h3{font-size:14px}.empty{padding:45px;text-align:center;background:white;border:1px dashed var(--line);border-radius:20px}.history-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 22px;display:flex;align-items:center;gap:20px;margin-bottom:10px}.history-item h3{font-size:13px}.history-item p{font-size:10px}.result-num{font-size:22px;color:var(--accent)}.reader-layout{display:grid;grid-template-columns:240px 1fr;gap:25px}.reader-layout aside{min-width:0}.reader-page{white-space:pre-wrap;font:16px/1.8 Georgia,serif;color:#374236;background:white;border:1px solid var(--line);padding:35px;border-radius:15px;overflow-wrap:anywhere}.reader-tools{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:16px 0}.reader-tools input{width:80px;padding:8px;border:1px solid var(--line);border-radius:8px}.reader-tools button{font-size:11px}.pdf-frame{width:100%;height:78vh;border:1px solid var(--line);border-radius:12px;background:white}.breadcrumbs{display:flex;flex-wrap:wrap;gap:10px;font-size:11px;color:var(--muted);margin-bottom:16px}.progress{height:4px;background:#e9eee6;border-radius:5px;overflow:hidden;margin:16px 0 6px}.progress div{height:100%;background:var(--accent)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);border-radius:12px;background:#263e30;color:white;padding:12px 20px;font-size:12px;opacity:0;pointer-events:none;transition:opacity .2s;z-index:10}#toast.visible{opacity:1}.meta-row{display:flex;justify-content:space-between;gap:15px;font-size:10px;color:var(--muted);margin:10px 0}.action-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.bookmark{font-size:10px;color:var(--accent);margin-left:auto}.book-count{font-size:11px;color:var(--muted);margin-bottom:20px}@media(min-width:1550px){.cards{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:1150px){.sidebar{width:205px;padding:26px 17px}.tree-layout{grid-template-columns:minmax(0,1fr) 235px}.branch-panel{padding:18px}.branch-node{width:110px}.branch-node strong{font-size:10px}.orb{height:58px;width:58px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}main{padding:28px}.stat{padding:12px;gap:9px}.stat .stat-icon{display:none}header{padding:0 28px}}@media(max-width:900px){.sidebar{width:175px;padding:25px 12px}.brand{font-size:21px;gap:5px}.brand-mark{width:32px;height:34px}.beta{display:none}nav a{font-size:11px;padding:9px}.tree-layout{grid-template-columns:1fr}.branch-panel{display:grid;grid-template-columns:1fr 2fr;gap:18px}.subject-list{margin:0;max-height:200px}.panel-icon{width:35px;height:35px;font-size:20px;margin-bottom:9px}.course-layout{grid-template-columns:1fr}.course-layout>.branch-panel{display:block}.reader-layout{grid-template-columns:1fr}.reader-layout aside{display:none}h1{font-size:31px}header .crumb,header .slash{display:none}.profile select{max-width:155px}.stats{gap:8px}.stat strong{font-size:18px}.stat small{font-size:9px}}@media(max-width:640px){.shell{display:block}.sidebar{position:static;width:100%;height:auto;padding:15px 18px;background:#fff}.brand{font-size:21px}.brand-mark{height:29px;width:29px;font-size:24px}.workspace-label,.side-note,.local-note{display:none}nav{display:flex;gap:3px;margin-top:13px;justify-content:space-between}nav a{padding:7px 5px;font-size:9px;white-space:nowrap}nav a span{font-size:14px;width:18px}header{height:58px;padding:0 19px;font-size:10px}.avatar{width:25px;height:25px;font-size:10px}.profile select{max-width:153px;font-size:9px}main{padding:25px 18px}h1{font-size:29px}.heading{align-items:flex-start;gap:10px}.heading .badge{display:none}.heading p{font-size:12px}.stats{grid-template-columns:repeat(2,1fr);gap:8px}.stat{padding:11px 14px}.stat .stat-icon{display:grid;width:29px;height:29px;font-size:17px}.garden{padding:15px;min-height:475px}.tree-scene{height:390px}.branch-node{width:99px}.branch-node[data-group=code]{left:16%;top:60px}.branch-node[data-group=quant]{left:48%;top:18px}.branch-node[data-group=language]{left:84%;top:72px}.branch-node[data-group=science]{left:76%;top:220px}.orb{width:49px;height:49px;font-size:20px;margin-bottom:10px}.branch-node strong{font-size:9px}.branch-node small{font-size:8px}.root-node{left:42%}.root-disc{height:54px;width:54px}.garden-head{font-size:9px}.garden-tip{font-size:9px}.branch-panel{grid-template-columns:1fr;gap:10px}.branch-panel>div:first-child{display:flex;gap:12px;align-items:center}.branch-panel h2{font-size:17px}.branch-panel .panel-icon{flex-shrink:0}.subject-list{grid-template-columns:1fr 1fr;max-height:260px;gap:7px}.subject-row{padding:9px 7px;gap:4px}.subject-row strong{font-size:10px}.subject-row small{font-size:8px}.mini-icon{font-size:14px;width:20px;flex-shrink:0}.cards{grid-template-columns:1fr 1fr;gap:10px}.card{padding:15px;border-radius:14px}.card h3{font-size:13px}.card p{font-size:10px}.card .bottom{font-size:8px}.card-top{margin-bottom:13px}.tag{font-size:8px}.book-cover{height:137px;padding:12px}.book-cover strong{font-size:15px}.book-cover small{font-size:7px}.book-card .license{font-size:8px}.book-actions{display:grid}.book-actions a{font-size:9px}.filters{gap:8px}.filters input{width:100%;flex-basis:100%}.filters select{flex:1;width:45%}.paper{padding:22px 18px}.reading{font-size:18px}.lesson-row{padding:13px 12px;gap:10px}.lesson-row h3{font-size:12px}.lesson-row p{font-size:9px}.lesson-num{width:29px;height:29px;flex-shrink:0}.lesson-row .bookmark{font-size:9px}.history-item{padding:16px;gap:12px}.history-item .secondary{font-size:10px;padding:7px}.reader-page{padding:20px;font-size:14px}footer{padding:18px;font-size:9px;display:block}footer span{display:block;margin-top:5px}.notice{font-size:10px}.empty{padding:25px}.eyebrow{font-size:9px}.section-head h2{font-size:17px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

.subject-branch{min-width:0}.subject-branch>summary{cursor:pointer;list-style:none}.subject-branch>summary::-webkit-details-marker{display:none}.twigs{margin:8px 0 13px 12px;padding:2px 0 0 15px;border-left:1px solid var(--accent)}.twigs details{margin-top:10px}.twigs summary{cursor:pointer;font-size:11px;color:var(--accent)}.twig-leaf{display:block;border-left:1px solid var(--line);margin:7px 0 7px 5px;padding-left:10px;font-size:10px;color:#73856d}.twig-leaf:hover{color:var(--accent)}
@media(max-width:640px){nav{display:grid;grid-template-columns:1fr 1fr;gap:4px}nav a{font-size:11px;padding:7px 9px}.profile{min-width:0;gap:6px}.profile .muted{display:block;max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile .secondary{font-size:10px;padding:8px}.profile .avatar{display:none}}