:root{--blue-soft:#e8efff;--green:#2b8a3e;--green-soft:#e6f6ea;--red-soft:#fdecf1;--amber-soft:#fff3d6;--purple:#7048e8;--purple-soft:#efeaff;--teal:#0c8599;--teal-soft:#e3f7fa;--orange:#e8590c;--orange-soft:#fff0e6;--gray-soft:#f1efe9}a{color:inherit;text-decoration:none}.grow{flex:1;min-width:0}.muted{color:var(--muted)}.small{font-size:13px}.center{text-align:center}.lead{color:#4b5563;margin:8px 0 0;font-size:17px;line-height:1.55}.btn{border:1px solid var(--line);background:var(--panel);height:40px;color:var(--ink);white-space:nowrap;border-radius:12px;justify-content:center;align-items:center;gap:6px;padding:0 16px;font-size:14px;font-weight:800;transition:transform 80ms,background .12s,box-shadow .12s;display:inline-flex}.btn:hover:not(:disabled){background:#faf7f0;box-shadow:0 2px 8px #1f23280f}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:default}.btn.primary{background:var(--ink);border-color:var(--ink);color:var(--on-ink)}.btn.primary:hover:not(:disabled){background:#2d333b}.btn.ghost{background:0 0;border-color:#0000}.btn.ghost:hover:not(:disabled){background:#f3efe6}.btn.small{border-radius:10px;height:32px;padding:0 11px;font-size:13px}.btn.big{border-radius:16px;height:52px;padding:0 26px;font-size:17px}.btn.danger{color:var(--danger)}.link{color:var(--blue);font-size:14px;font-weight:800}.link-btn{color:var(--blue);background:0 0;border:none;padding:0;font-size:13px;font-weight:800}.form-error{color:var(--danger);margin:8px 0 0;font-size:14px;font-weight:700}.form-error.small{font-size:12px}.badge{background:var(--gray-soft);color:#4b5563;vertical-align:middle;border-radius:999px;align-items:center;margin-left:6px;padding:2px 8px;font-size:11px;font-weight:800;display:inline-flex}.badge.good{background:var(--green-soft);color:var(--green)}.badge.warn{background:var(--amber-soft);color:#92400e}.chips.left{justify-content:flex-start}.chip.active{background:var(--ink);color:var(--on-ink);border-color:var(--ink)}.chip.big{padding:10px 16px;font-size:15px}.spinner{border:2.5px solid var(--line);border-top-color:var(--accent);vertical-align:-3px;border-radius:50%;width:16px;height:16px;margin-right:6px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.building{color:#6b4c16;background:var(--amber-soft);border-radius:12px;margin:8px 0 0;padding:12px 14px;font-weight:700}.skeleton{background:linear-gradient(90deg,#f1eee6 25%,#faf8f3 50%,#f1eee6 75%) 0 0/200% 100%;border-radius:14px;height:84px;margin-bottom:10px;animation:1.2s infinite shimmer}@keyframes shimmer{to{background-position:-200% 0}}.hand-text{display:block;overflow:visible}.hand-text.animate path{stroke-dasharray:1;stroke-dashoffset:1px;animation:.32s ease-out forwards hand-draw}@keyframes hand-draw{to{stroke-dashoffset:0}}@media (prefers-reduced-motion:reduce){.hand-text.animate path{stroke-dashoffset:0;animation:none}}.shell{min-height:100vh;display:flex}.side-nav{border-right:1px solid var(--line);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:5;background:#ffffffb8;flex-direction:column;flex:none;gap:14px;width:232px;height:100vh;padding:22px 16px;display:flex;position:sticky;top:0}.brand-name{letter-spacing:-.5px;font-size:24px;font-weight:900}.brand-name span{color:var(--accent)}.brand-name.big{font-size:34px}.side-brand{padding:0 8px}.new-session{width:100%}.nav-links{flex-direction:column;gap:2px;display:flex}.nav-link{color:#4b5563;border-radius:12px;align-items:center;gap:10px;padding:10px 12px;font-weight:800;display:flex}.nav-link:hover{background:#f3efe6}.nav-link.active{color:var(--accent-ink);background:#fff1d6}.side-foot{margin-top:auto;padding:0 8px}.shell-main{flex:1;min-width:0}.page{max-width:1180px;margin:0 auto;padding:34px 32px 80px}.page.narrow{max-width:820px}.page-hero{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:22px;display:flex}.hero-stats{gap:10px;display:flex}.stat{background:var(--panel);border:1px solid var(--line);text-align:center;border-radius:16px;min-width:92px;padding:10px 16px}.stat b{font-size:24px;display:block}.stat span{color:var(--muted);font-size:12px;font-weight:700}.crumbs{color:var(--muted);margin-bottom:10px;font-size:13px;font-weight:700}.crumbs a{color:var(--blue)}.panel{background:var(--panel);border:1px solid var(--line);border-radius:20px;margin-bottom:18px;padding:20px 22px;box-shadow:0 1px 2px #1f232808}.panel h2{margin:0 0 10px;font-size:19px}.panel-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.panel-head h2{margin:0}.sub-h{color:#4b5563;margin:16px 0 6px;font-size:14px}.sub-h.good{color:var(--green)}.sub-h.warn{color:var(--orange)}.grid-2{grid-template-columns:1fr 1fr;gap:18px;display:grid}.grid-2>.panel{margin-bottom:0}.grid-3{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.grid-main-side{grid-template-columns:minmax(0,1fr) 360px;align-items:start;gap:18px;display:grid}.empty-mini{flex-direction:column;align-items:flex-start;gap:10px;display:flex}.empty-mini p{color:var(--muted);margin:0}.setup-card{background:linear-gradient(120deg,#fff3d6,#ffe8f0);border:1px solid #f7d9a8;border-radius:18px;align-items:center;gap:14px;margin-bottom:18px;padding:16px 20px;display:flex}.setup-card>span:first-child{font-size:28px}.setup-card p{color:#6b4c16;margin:2px 0 0}.setup-card .arrow{margin-left:auto;font-size:22px;font-weight:900}.ask-panel{background:linear-gradient(#fff,#fffaf0)}.askbox form{gap:10px;display:flex}.askbox input{border:1.5px solid var(--line);height:52px;font:inherit;background:var(--panel);border-radius:16px;flex:1;padding:0 18px;font-size:17px}.askbox input:focus{border-color:var(--ink);outline:none}.askbox .btn{border-radius:16px;height:52px}.askbox .chips{margin-top:12px}.mastery{align-items:center;gap:8px;margin-top:6px;display:flex}.mastery-track{background:#efebe1;border-radius:99px;flex:1;min-width:60px;height:8px;overflow:hidden}.mastery.small .mastery-track{height:6px}.mastery-fill{border-radius:99px;height:100%;transition:width .4s}.mastery-pct{color:var(--muted);text-align:right;width:36px;font-size:12px;font-weight:800}.tone-new{background:#d9d3c4}.tone-weak{background:#f08c4a}.tone-mid{background:#f2c200}.tone-good{background:#74c476}.tone-great{background:#2b8a3e}.countdown{background:var(--ink);width:64px;height:64px;color:var(--on-ink);border-radius:16px;flex-direction:column;flex:none;justify-content:center;align-items:center;line-height:1;display:flex}.countdown b{font-size:24px}.countdown span{opacity:.75;margin-top:3px;font-size:11px}.countdown.big{width:84px;height:84px}.countdown.big b{font-size:32px}.countdown.hero{background:linear-gradient(160deg,#1f2328,#3b3f46);border-radius:24px;width:110px;height:110px}.countdown.hero b{font-size:44px}.exam-list,.exam-cards,.topic-mini,.note-list,.card-list,.peer-list,.remember-list,.review-list,.plan-days,.plan-days ul{margin:0;padding:0;list-style:none}.exam-row{border-radius:14px;align-items:center;gap:14px;padding:10px;display:flex}.exam-row:hover{background:#faf7f0}.exam-row h3,.exam-card h3{margin:0;font-size:17px}.exam-row p{margin:2px 0 0}.exam-card{border:1px solid var(--line);border-radius:16px;margin-top:12px;padding:14px}.exam-card-head{align-items:center;gap:14px;display:flex}.exam-card-body{gap:8px;margin-top:12px;display:grid}.exam-card-body .btn{justify-self:start;margin-top:4px}.subject-progress{grid-template-columns:1fr auto 140px;align-items:center;gap:10px;font-weight:700;display:grid}.subject-progress .mastery{margin:0}.exam-overview{gap:16px;display:grid}.exam-big{transition:box-shadow .15s,transform .15s;display:block}.exam-big:hover{box-shadow:var(--shadow);transform:translateY(-1px)}.exam-big h2{margin:0}.subject-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:10px 22px;margin-top:14px;display:grid}.inline-form{gap:10px;display:flex}.inline-form input{border:1.5px solid var(--line);height:44px;font:inherit;border-radius:12px;flex:1;padding:0 14px;font-size:15px}.editor-wrap{border:1.5px dashed var(--line);border-radius:16px;margin:10px 0;padding:16px}.editor-wrap h3{margin:0 0 10px}.exam-editor{gap:12px;display:grid}.form-row.two{grid-template-columns:2fr 1fr;gap:12px;display:grid}.field{color:#374151;flex-direction:column;gap:5px;font-size:13px;font-weight:800;display:flex}.field>span{align-items:center;gap:8px;display:flex}.field em{color:var(--danger);font-style:normal}.field input,.field textarea,.field select{font:inherit;border:1.5px solid var(--line);background:var(--panel);color:var(--ink);border-radius:12px;padding:10px 12px;font-size:15px;font-weight:600}.field textarea{resize:vertical;line-height:1.45}.field input:focus,.field textarea:focus{border-color:var(--ink);outline:none}.field.invalid input,.field.invalid textarea{border-color:var(--danger);background:#fff8fa}.field small{color:var(--danger);font-weight:700}.field .link-btn{margin-left:auto}.subject-box{border:1px solid var(--line);background:#fffdf8;border-radius:14px;gap:10px;padding:12px;display:grid}.subject-head{align-items:flex-end;gap:10px;display:flex}.form-actions{flex-wrap:wrap;align-items:center;gap:8px;margin-top:6px;display:flex}.form-actions.center{justify-content:center}.topic-mini li{border-bottom:1px dashed var(--line);align-items:center;gap:12px;padding:8px 0;display:flex}.topic-mini li:last-child{border-bottom:none}.topic-actions{flex-wrap:wrap;flex:none;align-items:center;gap:6px;display:flex}.topic-tree{margin:0;padding:0;list-style:none}.topic-node{border-top:1px solid var(--line)}.topic-node:first-child{border-top:none}.topic-row{align-items:center;gap:10px;padding:10px 4px;display:flex}.topic-row .mastery{flex:none;width:110px;margin:0}.topic-row p{margin:2px 0 0}.twisty{width:22px;color:var(--muted);background:0 0;border:none;font-size:13px}.topic-title{text-align:left;background:0 0;border:none;padding:0;font-size:15.5px;font-weight:800}.topic-title.plain{font-size:14.5px;font-weight:700}.subtopics{border-left:2px dashed var(--line);margin:0 0 8px 36px;padding:0;list-style:none}.subtopics .topic-row{padding-left:12px}.st{border-radius:50%;flex:none;place-items:center;width:22px;height:22px;font-size:12px;font-weight:900;display:grid}.st.done{background:var(--green);color:#fff}.st.learning{background:var(--amber-soft);color:#b45309}.st.new{color:#b8b0a0}.note-list li{border-bottom:1px dashed var(--line);padding:10px 0}.note-list li:last-child{border-bottom:none}.note-list p{color:#4b5563;margin:4px 0;font-size:14px}.note-list li.resolved b{color:var(--muted);text-decoration:line-through}.plan-summary{background:var(--blue-soft);border-radius:12px;margin:0 0 10px;padding:10px 12px;font-size:14px}.plan-days>li{border-bottom:1px dashed var(--line);padding:8px 0}.plan-days>li.today .plan-date{color:var(--accent-ink)}.plan-date{margin-bottom:4px;font-size:13px;font-weight:900}.plan-date span{color:var(--muted);font-weight:700}.plan-task{text-align:left;background:0 0;border:none;border-radius:8px;gap:8px;width:100%;padding:6px 4px;font-size:14px;font-weight:700;display:flex}.plan-task:hover:not(:disabled){background:#faf7f0}.plan-task small{color:var(--muted);font-size:12px;font-weight:600;display:block}.session-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;display:grid}.session-grid.big{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}.session-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;flex-direction:column;transition:box-shadow .15s,transform .15s;display:flex;overflow:hidden}.session-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}.thumb{aspect-ratio:16/9;border-bottom:1px solid var(--line);background:#fffdf7 radial-gradient(#e4ddcc 1.2px,#0000 1.2px) 0 0/18px 18px;display:block;overflow:hidden}.thumb img{object-fit:cover;object-position:top;width:100%;height:100%}.thumb-empty{opacity:.5;place-items:center;width:100%;height:100%;font-size:30px;display:grid}.session-meta{padding:10px 12px 12px}.session-meta h3{margin:4px 0 2px;font-size:15px;line-height:1.3}.session-meta p{margin:0}.origin{text-transform:uppercase;letter-spacing:.4px;color:var(--blue);font-size:11px;font-weight:900}.origin-quiz_explain{color:var(--danger)}.origin-topic{color:var(--green)}.origin-onboarding{color:var(--purple)}.card-actions{flex-wrap:wrap;gap:6px;margin-top:10px;display:flex}.toolbar-row{flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px;display:flex}.search{border:1.5px solid var(--line);min-width:220px;height:42px;font:inherit;background:var(--panel);border-radius:12px;flex:1;padding:0 14px}.seg{background:#efebe1;border-radius:12px;padding:3px;display:inline-flex}.seg button{color:#4b5563;background:0 0;border:none;border-radius:9px;padding:7px 12px;font-size:13px;font-weight:800}.seg button.active{background:var(--panel);color:var(--ink);box-shadow:0 1px 3px #00000014}.session-title{text-overflow:ellipsis;white-space:nowrap;background:0 0;border:none;border-radius:10px;max-width:420px;padding:6px 10px;font-size:15px;font-weight:800;overflow:hidden}.session-title:hover{background:#f3efe6}.session-title span{color:var(--muted);font-size:12px}.session-title.in-card{text-align:left;max-width:100%;padding:4px 0;display:block}.session-title-input{font:inherit;border:1.5px solid var(--ink);border-radius:10px;width:320px;padding:5px 10px;font-size:15px;font-weight:800}.back-arrow{color:var(--muted);margin-right:4px;font-weight:900}.topbar .brand{align-items:center;gap:4px}.save-dot{color:var(--muted);font-size:12px;font-weight:700}.save-dot.error{color:var(--danger)}.card-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;display:grid}.mem-card{background:var(--panel);border:1px solid var(--line);border-left:5px solid #d9d3c4;border-radius:14px;padding:12px 14px;list-style:none}.mem-card h3{margin:6px 0 4px;font-size:15.5px;line-height:1.3}.mem-card p{color:#4b5563;margin:0 0 4px;font-size:14px;line-height:1.45}.mem-card-top{align-items:center;gap:6px;display:flex}.mem-card-top .muted{margin-left:auto}.mem-card-type{text-transform:uppercase;letter-spacing:.4px;color:#6b7280;font-size:11.5px;font-weight:900}.mem-card.tone-blue{border-left-color:var(--blue)}.mem-card.tone-red{border-left-color:var(--danger)}.mem-card.tone-amber{border-left-color:var(--accent)}.mem-card.tone-purple{border-left-color:var(--purple)}.mem-card.tone-green{border-left-color:var(--green)}.mem-card.tone-teal{border-left-color:var(--teal)}.mem-card.tone-orange{border-left-color:var(--orange)}.mem-card.tone-gray{border-left-color:#9ca3af}.mem-card.resolved{opacity:.75}.mem-card.resolved h3{text-decoration:line-through}.card-edit{gap:6px;margin:8px 0;display:grid}.card-edit input,.card-edit textarea{font:inherit;border:1.5px solid var(--line);border-radius:10px;padding:8px 10px}.evidence{color:var(--muted);margin-top:4px;font-size:13px}.evidence summary{cursor:pointer;font-weight:800}.evidence ul{margin:4px 0 0;padding-left:18px}.tabs{border-bottom:1px solid var(--line);gap:4px;margin-bottom:16px;padding-bottom:6px;display:flex;overflow-x:auto}.tabs button{color:#4b5563;white-space:nowrap;background:0 0;border:none;border-radius:10px;padding:9px 14px;font-size:14px;font-weight:800}.tabs button:hover{background:#f3efe6}.tabs button.active{background:var(--ink);color:var(--on-ink)}.tab-count{background:#00000014;border-radius:99px;margin-left:6px;padding:1px 7px;font-size:11px}.tabs button.active .tab-count{background:#fff3}.tab-intro{color:#4b5563;max-width:760px;margin:0 0 14px}.stat-row{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:18px;display:grid}.stat-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:14px 16px}.stat-card b{font-size:26px;display:block}.stat-card span{color:var(--muted);font-size:13px;font-weight:700}.heatmap{gap:10px;display:grid}.heat-row{grid-template-columns:160px 1fr;align-items:center;gap:12px;display:grid}.heat-subject{font-size:14px;font-weight:800}.heat-cells{flex-wrap:wrap;gap:5px;display:flex}.heat-cell{vertical-align:middle;border-radius:5px;width:20px;height:20px;display:inline-block}.heat-cell.done{box-shadow:inset 0 0 0 2px #ffffffb3}.heat-legend{color:var(--muted);flex-wrap:wrap;align-items:center;gap:6px;margin-top:6px;font-size:12px;font-weight:700;display:flex}.heat-legend .heat-cell{width:12px;height:12px;margin-left:8px}.score-chart{width:100%;height:auto}.score-line{fill:none;stroke:var(--blue);stroke-width:3px;stroke-linejoin:round}.pass-line{stroke:var(--green);stroke-dasharray:6 5;stroke-width:1.5px}.axis-label{fill:var(--green);font-size:11px;font-weight:800}.pt{fill:#fff;stroke:var(--blue);stroke-width:2.5px}.pt.good{fill:var(--green);stroke:var(--green)}.two-lists{grid-template-columns:1fr 1fr;gap:16px;display:grid}.two-lists ul{margin:0;padding-left:18px;font-size:14px;font-weight:700;line-height:1.8}.ledger{grid-template-columns:repeat(3,1fr);align-items:start;gap:14px;display:grid}.ledger-col{background:#faf7f0;border-radius:16px;gap:10px;padding:12px;display:grid}.ledger-col h3{margin:0;font-size:15px}.ledger-col.resolved{background:var(--green-soft)}.ledger-col.open{background:var(--red-soft)}.own-words{gap:14px;display:grid}.then-now h3{margin:0 0 10px}.tn-grid{gap:12px;display:grid}.tn-grid.two{grid-template-columns:1fr 1fr}blockquote{background:#faf7f0;border-radius:14px;margin:0;padding:12px 14px;font-family:Segoe Print,Bradley Hand,Comic Sans MS,cursive;font-size:15px;line-height:1.5}blockquote span{font-family:var(--font-ui), sans-serif;margin-bottom:4px;display:block}blockquote.now{background:var(--green-soft)}.pref-slider{gap:6px;margin:14px 0;display:grid}.pref-label{font-size:14px;font-weight:800}.pref-track{grid-template-columns:120px 1fr 140px;align-items:center;gap:10px;display:grid}.pref-track span:last-child{text-align:right}.pref-track input{accent-color:var(--ink);width:100%}.pref-block{gap:8px;margin:16px 0;display:grid}.pref-suggestion{background:var(--memory-soft);color:var(--memory-ink);border-radius:12px;flex-wrap:wrap;align-items:center;gap:8px;margin:-6px 0 12px;padding:8px 12px;font-size:13px;font-weight:700;display:flex}.hour-chart{align-items:flex-end;gap:3px;height:84px;display:flex}.hour-chart span{background:#e4ddcc;border-radius:4px 4px 0 0;flex:1}.hour-chart span.best{background:var(--accent)}.hour-axis{justify-content:space-between;display:flex}.switch{align-items:center;gap:10px;margin:12px 0;font-weight:800;display:flex}.switch input{width:20px;height:20px;accent-color:var(--ink)}.peer{border:1px solid var(--line);border-radius:14px;margin-top:10px;padding:12px}.peer p{margin:4px 0 0;font-size:14px}.digest h4{margin:0 0 6px}.digest ul{margin:0;padding-left:18px;font-size:14.5px;line-height:1.6}.digest-headline{margin:6px 0 14px;font-size:20px}.share-row{gap:8px;margin-top:18px;display:flex}.share-row input{border:1.5px solid var(--line);height:40px;font:inherit;color:#4b5563;border-radius:12px;flex:1;padding:0 12px;font-size:13px}.share-page h1{margin:6px 0;font-size:34px}.share-page ul{line-height:1.7}.quiz-head{justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:14px;display:flex}.quiz-head h1{margin:2px 0 0;font-size:28px}.quiz-progress{gap:6px;display:flex}.quiz-progress .dot{background:#e4ddcc;border-radius:50%;width:12px;height:12px}.quiz-progress .dot.cur{background:var(--ink)}.quiz-progress .dot.right{background:var(--green)}.quiz-progress .dot.wrong{background:var(--danger)}.stem{margin:0 0 10px;font-size:16px;font-weight:800;line-height:1.45}.stem.big{margin:8px 0 16px;font-size:21px}.options{gap:10px;display:grid}.option{text-align:left;border:1.5px solid var(--line);background:var(--panel);border-radius:14px;align-items:center;gap:12px;padding:14px 16px;font-size:16px;font-weight:700;transition:border-color .12s,background .12s,transform 80ms;display:flex}.option:hover:not(:disabled){border-color:var(--ink);transform:translate(2px)}.option .letter{background:#f3efe6;border-radius:9px;flex:none;place-items:center;width:30px;height:30px;font-weight:900;display:grid}.option.right{border-color:var(--green);background:var(--green-soft)}.option.right .letter{background:var(--green);color:#fff}.option.wrong{border-color:var(--danger);background:var(--red-soft)}.option.wrong .letter{background:var(--danger);color:#fff}.option.dim{opacity:.55}.feedback{border-radius:14px;margin-top:14px;padding:12px 14px;line-height:1.5}.feedback.right{background:var(--green-soft)}.feedback.wrong{background:var(--amber-soft)}.cause{gap:6px;margin-top:10px;display:grid}.quiz-result{text-align:center;border-radius:24px;flex-direction:column;align-items:center;gap:8px;margin-bottom:18px;padding:26px;display:flex}.quiz-result.pass{background:linear-gradient(160deg,#e6f6ea,#fffdf7)}.quiz-result.fail{background:linear-gradient(160deg,#fff0e6,#fffdf7)}.score-ring{flex-direction:column;align-items:center;margin:8px 0;display:flex}.score-ring b{font-size:54px;line-height:1}.score-ring span{color:var(--muted);font-weight:700}.review-list li{background:var(--panel);border:1px solid var(--line);border-left:5px solid var(--green);border-radius:14px;margin-bottom:10px;padding:14px 16px}.review-list li.wrong{border-left-color:var(--danger)}.review-list p{margin:0 0 8px}.mem-pill,.mem-chips,.fb-row,.teach-row{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:999px;flex-wrap:wrap;justify-content:center;align-self:center;align-items:center;gap:8px;padding:7px 12px;font-size:13.5px;font-weight:800;animation:.22s caption-in;display:inline-flex}.mem-pill{color:var(--purple)}.mem-brain{font-size:15px}.mem-chips-label{text-transform:uppercase;letter-spacing:.5px;color:var(--purple);font-size:11px}.mem-chip{background:var(--purple-soft);color:#4c2fb3;border-radius:999px;padding:3px 10px;font-size:12.5px}.fb-q{color:#4b5563}.fb-chip{border:1px solid var(--line);background:#faf7f0;border-radius:999px;padding:6px 12px;font-size:13.5px;font-weight:800}.fb-chip:hover:not(:disabled){border-color:var(--accent);background:#fff1d6}.fb-chip.good{background:var(--green-soft);border-color:#bfe5c8}.fb-chip:disabled{opacity:.5}.teach-row{border-radius:18px}.teach-row input{border:1.5px solid var(--line);width:320px;max-width:55vw;height:34px;font:inherit;border-radius:10px;padding:0 10px;font-weight:600}.drawer{border-left:1px solid var(--line);z-index:8;background:#fffdf7;width:min(380px,92vw);padding:18px;animation:.2s drawer-in;position:absolute;top:56px;bottom:0;right:0;overflow-y:auto;box-shadow:-8px 0 30px #1f232814}@keyframes drawer-in{0%{opacity:0;transform:translate(24px)}}.drawer-head{justify-content:space-between;align-items:flex-start;margin-bottom:12px;display:flex}.drawer-head h2{margin:0;font-size:19px}.drawer-head p{margin:2px 0 0;font-size:13px}.icon-x{background:#f3efe6;border:none;border-radius:10px;width:32px;height:32px;font-weight:900}.card-list{gap:10px;display:grid}.drawer-empty p{color:#4b5563;line-height:1.5}.auth-page{grid-template-columns:1fr 1fr;min-height:100vh;display:grid}.auth-side{background:#fffdf7 radial-gradient(#e4ddcc 1.4px,#0000 1.4px) 0 0/28px 28px;flex-direction:column;justify-content:center;gap:14px;padding:56px;display:flex}.auth-points{color:#374151;gap:10px;margin:12px 0 0;padding:0;font-weight:800;list-style:none;display:grid}.auth-form{place-items:center;padding:32px;display:grid}.auth-panel{justify-items:center;gap:16px;width:100%;max-width:25rem;display:grid}.auth-inapp{gap:14px;width:100%;display:grid}.auth-or{color:var(--muted);align-items:center;gap:12px;font-size:13px;font-weight:700;display:flex}.auth-or:before,.auth-or:after{content:"";background:var(--line);flex:1;height:1px}.auth-google{border:1px solid var(--line);color:#1f2328;width:100%;min-height:46px;font:inherit;cursor:pointer;background:#fff;border-radius:14px;justify-content:center;align-items:center;gap:10px;padding:0 16px;font-size:15px;font-weight:800;display:inline-flex;box-shadow:0 1px 2px #1f23280f}.auth-google:hover{background:#faf7f0}.auth-google:focus-visible{outline-offset:2px;outline:2px solid #1e5bd8}.auth-placeholder{text-align:center;background:#fff;border:1px solid #1f232814;border-radius:18px;gap:10px;width:min(25rem,100vw - 2.5rem);padding:32px 28px 28px;display:grid;box-shadow:0 10px 32px #1f232814,0 1px 2px #1f23280f}.auth-placeholder-title{color:#1f2328;margin:0;font-size:17px;font-weight:800}.auth-placeholder-sub{color:#6b7280;margin:0 0 8px;font-size:14px}.auth-placeholder-label{background:#eef0f3;border-radius:6px;width:92px;height:10px;margin-top:6px}.auth-placeholder-field,.auth-placeholder-btn{height:42px;font:inherit;border-radius:10px;align-items:center;padding:0 14px;font-size:14px;display:flex}.auth-placeholder-field{color:#9ca3af;border:1px solid #e3e6ea}.auth-placeholder-btn{color:#fff;opacity:.55;background:#1f2328;border:0;justify-content:center;font-weight:700;animation:1.4s ease-in-out infinite auth-pulse}.auth-placeholder-btn.is-live{opacity:1;cursor:pointer;animation:none}.auth-placeholder-slow{color:#6b7280;opacity:0;margin:4px 0 0;font-size:12.5px;animation:.3s 6s forwards auth-late}@keyframes auth-pulse{50%{opacity:.35}}@keyframes auth-late{to{opacity:1}}@media (prefers-reduced-motion:reduce){.auth-placeholder-btn{animation:none}}.inapp-actions{flex:1;gap:8px;display:grid}.inapp-manual{background:#fff7e6;border:1px solid #fde3a7;border-radius:12px;margin-top:14px;padding:12px 14px}.inapp-manual p{font-size:14px}.inapp-copy{gap:8px;margin-top:10px;display:flex}.inapp-copy input{border:1px solid var(--line);color:#1f2328;min-width:0;height:40px;font:inherit;background:#fff;border-radius:10px;flex:1;padding:0 10px;font-size:13px}.inapp-anyway{justify-self:center;margin-top:4px;font-size:13px}.demo-board{aspect-ratio:16/9;background:#fffdf7;width:100%;position:relative;overflow:hidden}.demo-board svg{width:100%;height:100%;display:block}.demo-board.mini{border:1px solid var(--line);border-radius:14px}.demo-caption{color:#fff;text-align:center;background:#1f2328d9;border-radius:12px;max-width:88%;padding:7px 12px;font-size:14px;font-weight:700;animation:.22s caption-in;position:absolute;bottom:12px;left:50%;transform:translate(-50%)}.demo-board.mini .demo-caption{font-size:12px;bottom:8px}.onb{background:#fffdf7 radial-gradient(#e9e2d2 1.3px,#0000 1.3px) 0 0/30px 30px;flex-direction:column;min-height:100vh;display:flex}.onb-top{align-items:center;gap:18px;padding:18px 28px;display:flex}.onb-steps{margin:0;flex:1;gap:6px;max-width:520px;margin-inline:auto;padding:0;list-style:none;display:flex}.onb-steps li{background:#e4ddcc;border-radius:99px;flex:1;height:6px;transition:background .2s}.onb-steps li.done{background:var(--ink)}.onb-steps li.cur{background:var(--accent)}.onb-main{flex:1;align-content:start;gap:18px;width:min(980px,100% - 40px);margin:10px auto 40px;display:grid}.onb-host{align-items:center;gap:16px;display:flex}.avatar-face.big{width:84px;height:84px}.onb-bubble{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:16px 20px;font-size:22px;font-weight:800;animation:.26s caption-in;position:relative}.onb-bubble:before{content:"";background:var(--panel);border-left:1px solid var(--line);border-bottom:1px solid var(--line);width:16px;height:16px;position:absolute;top:50%;left:-9px;transform:translateY(-50%)rotate(45deg)}.onb-card{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:24px;gap:16px;padding:26px;animation:.26s caption-in;display:grid}.onb-sub{margin:0;font-size:17px;font-weight:800}.big-input{border:2px solid var(--line);height:60px;font:inherit;border-radius:16px;padding:0 18px;font-size:24px;font-weight:800}.big-input.small{height:48px;font-size:17px;font-weight:700}.big-input:focus{border-color:var(--ink);outline:none}.name-board{border:1px dashed var(--line);background:#fffdf7 radial-gradient(#e4ddcc 1.2px,#0000 1.2px) 0 0/20px 20px;border-radius:16px;align-items:center;min-height:90px;padding:10px 16px;display:flex}.choice-grid{grid-template-columns:repeat(4,1fr);gap:12px;display:grid}.choice{border:2px solid var(--line);background:var(--panel);border-radius:18px;flex-direction:column;align-items:center;gap:8px;padding:20px 12px;font-size:15px;font-weight:800;transition:transform .12s,border-color .12s;display:flex}.choice:hover{transform:translateY(-2px)}.choice.active{border-color:var(--ink);background:#fffaf0}.choice-icon{font-size:36px}.onb-exams{gap:8px;margin:0;padding:0;list-style:none;display:grid}.onb-exams li{background:#faf7f0;border-radius:12px;padding:10px 12px}.analogy-preview{background:var(--purple-soft);border-radius:16px;gap:4px;padding:12px 16px;display:grid}.ab-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.ab-card{gap:10px;display:grid}.finale h3{margin:0;font-size:22px}.remember-list{gap:8px;font-size:16px;font-weight:700;display:grid}.remember-list li{background:#faf7f0;border-radius:12px;padding:10px 14px}.feature-strip{flex-wrap:wrap;gap:8px;display:flex}.feature-strip span{color:var(--accent-ink);background:#fff1d6;border-radius:999px;padding:6px 12px;font-size:13px;font-weight:800}.finale{gap:14px;display:grid}.finale .btn{justify-self:start}.finale-waiting{color:#1f2328;overflow-wrap:anywhere;background:#eef4ff;border-radius:12px;margin:0;padding:10px 14px;font-size:14.5px}.finale-choice{flex-wrap:wrap;gap:10px;display:flex}.finale-choice+.muted{margin:-4px 0 0}@media (max-width:640px){.finale-choice .btn{white-space:normal;flex:100%;justify-content:center;height:auto;min-height:52px}}.onb-nav{border-top:1px dashed var(--line);align-items:center;gap:8px;padding-top:14px;display:flex}.onb-exam-choice{flex-wrap:wrap;gap:10px;display:flex}@media (max-width:640px){.onb-exam-choice .btn{flex:100%;justify-content:center;min-height:52px}.onb-top{flex-wrap:wrap;gap:10px 12px;padding:14px 16px 6px}.onb-top .toggle{margin-left:auto}.onb-steps{flex:100%;order:1;max-width:none}.onb-main{width:calc(100% - 32px)}}.rhythm .pref-block:first-child{margin-top:0}.landing{background:#fffdf7;min-height:100vh}.land-nav{z-index:10;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#fffdf7d9;align-items:center;gap:10px;padding:14px 32px;display:flex;position:sticky;top:0}.land-link{color:#4b5563;border-radius:10px;padding:8px 12px;font-weight:800}.land-link:hover{background:#f3efe6}.hero{grid-template-columns:1fr 1.15fr;align-items:center;gap:40px;max-width:1320px;margin:0 auto;padding:56px 40px 40px;display:grid}.eyebrow{text-transform:uppercase;letter-spacing:1.2px;color:var(--accent-ink);background:#fff1d6;border-radius:999px;margin-bottom:14px;padding:5px 12px;font-size:12px;font-weight:900;display:inline-block}.eyebrow.center{width:max-content;margin:0 auto 10px;display:block}.hero-copy .lead{max-width:520px;margin-top:18px;font-size:19px}.hero-cta{flex-wrap:wrap;align-items:center;gap:16px;margin-top:26px;display:flex}.board-frame{border:1px solid var(--line);background:var(--panel);border-radius:22px;overflow:hidden;transform:rotate(.6deg);box-shadow:0 30px 80px #1f232824,0 6px 18px #1f23280f}.board-frame.small{transform:rotate(-.6deg)}.board-frame-bar{border-bottom:1px solid var(--line);background:#faf7f0;align-items:center;gap:6px;padding:10px 14px;display:flex}.board-frame-bar span{background:#e4ddcc;border-radius:50%;width:11px;height:11px}.board-frame-bar b{color:#4b5563;margin-left:10px;font-size:13px}.land-section{max-width:1180px;margin:0 auto;padding:70px 40px}.land-section h2{letter-spacing:-.8px;margin:0 0 24px;font-size:clamp(28px,3.4vw,42px);line-height:1.15}.land-section h2.center{text-align:center}.hl{background:linear-gradient(#0000 58%,#ffe08a 58%)}.how-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.how-card{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:22px}.how-card h3{margin:10px 0 6px}.how-card p{color:#4b5563;margin:0;line-height:1.55}.how-n{background:var(--ink);width:38px;height:38px;color:var(--on-ink);border-radius:12px;place-items:center;font-weight:900;display:grid}.land-section.split{grid-template-columns:1fr 1.1fr;align-items:center;gap:44px;display:grid}.feature-list{color:#374151;gap:12px;margin:0;padding:0;font-size:16px;line-height:1.5;list-style:none;display:grid}.flow{align-items:stretch;gap:10px;display:flex}.flow-step{background:var(--panel);border:1px solid var(--line);border-radius:20px;flex:1;padding:20px}.flow-step>span{font-size:30px}.flow-step h3{margin:8px 0 4px}.flow-step p{color:#4b5563;margin:0;line-height:1.5}.flow-arrow{color:var(--muted);align-self:center;font-size:24px;font-weight:900}.land-section.cta{text-align:center;flex-direction:column;align-items:center;gap:14px;display:flex}.land-foot{border-top:1px solid var(--line);justify-content:space-between;align-items:center;padding:26px 40px;display:flex}@media (max-width:1000px){.grid-main-side,.hero,.land-section.split,.auth-page{grid-template-columns:1fr}.auth-side{padding:32px}}@media (max-width:640px){.auth-page{grid-template-rows:auto 1fr}.auth-side{justify-content:flex-start;gap:8px;padding:22px 20px 4px}.auth-side .auth-points{display:none}.auth-form{place-items:start center;padding:12px 12px 32px}.auth-inapp{width:min(100%,100vw - 2.5rem)}}@media (max-width:1000px){.flow{flex-direction:column}.flow-arrow{transform:rotate(90deg)}.ledger,.grid-3,.how-grid{grid-template-columns:1fr}}@media (max-width:820px){.shell{flex-direction:column}.side-nav{flex-flow:wrap;align-items:center;width:100%;height:auto;position:static}.nav-links{flex-flow:wrap}.side-foot{margin:0 0 0 auto}.new-session{width:auto}.page{padding:22px 16px 60px}.grid-2,.ab-grid,.tn-grid.two,.two-lists,.form-row.two{grid-template-columns:1fr}.choice-grid{grid-template-columns:1fr 1fr}.askbox form,.inline-form{flex-direction:column}.topic-row{flex-wrap:wrap}.topic-row .mastery{width:100%}.pref-track{grid-template-columns:80px 1fr 80px}.heat-row{grid-template-columns:1fr}}.feature-list li{align-items:flex-start;gap:12px;display:flex}.feat-icon,.flow-icon{background:var(--accent-soft);width:32px;height:32px;color:var(--accent-ink);border-radius:10px;flex:none;place-items:center;display:grid}.flow-icon{border-radius:12px;width:40px;height:40px}.flow-step>span.flow-icon{font-size:inherit}.land-section.split.reverse{grid-template-columns:1fr 1fr}.checkin-demo{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:22px;padding:22px}.cd-bar{background:var(--memory-soft);color:var(--memory-ink);border-radius:999px;align-items:center;gap:6px;padding:4px 10px;font-size:12.5px;font-weight:900;display:inline-flex}.cd-q{margin:14px 0 16px;font-size:19px;font-weight:800;line-height:1.35}.cd-opts{gap:8px;display:grid}.cd-opts span{border:1.5px solid var(--line);color:var(--ink-2);border-radius:14px;align-items:center;gap:12px;padding:11px 14px;font-weight:700;display:flex}.cd-opts i{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;place-items:center;width:26px;height:26px;font-size:13px;font-style:normal;font-weight:900;display:grid}.cd-opts .cd-right{border-color:var(--success);background:var(--success-soft);color:var(--ink)}.cd-opts .cd-right i{background:var(--success);border-color:var(--success);color:#fff}.cd-react{background:var(--surface-2);color:var(--ink-2);border-radius:14px;margin:16px 0 0;padding:12px 14px;font-weight:700;line-height:1.45}@media (max-width:1000px){.land-section.split.reverse{grid-template-columns:1fr}.land-section.split.reverse .checkin-demo{order:2}}.choice-icon{background:var(--accent-soft);width:52px;height:52px;color:var(--accent-ink);font-size:inherit;border-radius:16px;place-items:center;display:grid}.choice.active .choice-icon{background:var(--accent);color:#2b1a00}.remember-list li,.onb-exams li{align-items:center;gap:10px;display:flex}.remember-list li>svg,.onb-exams li>svg{color:var(--accent-ink);flex:none}.feature-strip span,.chip.big{align-items:center;gap:6px;display:inline-flex}.hero-title{font:inherit;flex-direction:column;align-items:flex-start;margin:0;display:flex}@media (max-width:640px){.land-nav{gap:6px;padding:12px 16px}.land-nav .btn{padding:0 12px}.hero{padding:28px 20px 32px}.land-section{padding:48px 20px}}