:root{--bg:#F7F8FA;--surface:#FFFFFF;--line:#E9EBEF;--line2:#DBDFE6;--ink:#0F1728;--soft:#5D6B82;--faint:#98A2B3;--accent:#4F46E5;--accent2:#4338CA;--accent-soft:#EEF0FE;--accent-line:#C7CBF7;--green:#067647;--green-soft:#ECFDF3;--green-line:#ABEFC6;--red:#D92D20;--red-soft:#FEF3F2;--red-line:#FECDCA;--amber:#B54708;--amber-soft:#FFFAEB;--side:#0C1424;--side2:#1B2740;--side-line:rgba(255,255,255,.08);--side-text:#AEB9CC;--sh-xs:0 1px 2px rgba(15,23,40,.05);--sh:0 1px 2px rgba(15,23,40,.04), 0 2px 6px rgba(15,23,40,.05);--sh2:0 2px 4px rgba(15,23,40,.04), 0 12px 24px -6px rgba(15,23,40,.12);--sh3:0 8px 16px rgba(15,23,40,.06), 0 24px 48px -12px rgba(15,23,40,.18);--rs:9px;--r:14px;--rl:20px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,system-ui,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.5}h1,h2,h3,h4{letter-spacing:-.015em;font-weight:700}.mono{font-family:IBM Plex Mono,monospace}button{font-family:Inter,sans-serif;outline:none}::selection{background:var(--accent-soft)}button:focus-visible,a:focus-visible,textarea:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:4px}@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--line2);border-radius:99px;border:2px solid var(--bg)}::-webkit-scrollbar-thumb:hover{background:var(--faint)}.app{display:flex;min-height:100vh}#sidebar{width:264px;flex:0 0 264px;background:linear-gradient(180deg,var(--side),#0A101E);color:var(--side-text);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto;border-right:1px solid var(--side-line)}.sideLogo{display:flex;align-items:center;gap:10px;padding:20px 18px 16px;color:#fff;font-weight:700;font-size:1.02rem;cursor:pointer;letter-spacing:-.01em}.sideLogo .lmark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--accent),#7C6FF0);display:grid;place-items:center;flex:0 0 auto;box-shadow:0 2px 8px #4f46e573}.sideSec{padding:16px 14px 6px;font-size:.65rem;letter-spacing:.13em;color:#5b6b8a;font-weight:700;text-transform:uppercase}.sideLink{display:flex;align-items:center;gap:10px;width:calc(100% - 16px);margin:1px 8px;padding:9px 11px;border:none;background:none;color:var(--side-text);font-size:.86rem;font-weight:500;border-radius:8px;cursor:pointer;text-align:left;transition:.13s}.sideLink:hover{background:#ffffff0f;color:#fff}.sideLink.on{background:var(--accent);color:#fff;font-weight:600;box-shadow:0 2px 10px #4f46e566}.sideLink .ico{width:18px;text-align:center;flex:0 0 auto}.sideUnit{display:flex;align-items:center;gap:9px;width:calc(100% - 16px);margin:1px 8px;padding:7.5px 11px;border:none;background:none;color:var(--side-text);font-size:.8rem;font-weight:500;border-radius:8px;cursor:pointer;text-align:left;transition:.13s}.sideUnit:hover{background:#ffffff0f;color:#fff}.sideUnit.on{background:#ffffff14;color:#fff;font-weight:600;box-shadow:inset 2px 0 0 var(--accent)}.sideUnit .n{font-family:IBM Plex Mono;font-size:.65rem;color:#5b6b8a;width:18px;flex:0 0 auto}.sideUnit .t{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sideUnit .bar{flex:0 0 34px;height:4px;border-radius:99px;background:#ffffff1f;overflow:hidden}.sideUnit .bar i{display:block;height:100%;background:var(--accent);border-radius:99px}.sideUnit.done .bar i{background:#34d399}.sideUnit .chk{flex:0 0 auto;color:#34d399;font-size:.72rem;font-weight:700}.sideFoot{margin-top:auto;display:flex;flex-direction:column;gap:12px;padding:14px 16px 18px;border-top:1px solid var(--side-line)}.sideHint{font-size:.72rem;color:#7686a3;line-height:1.55}.sideHint b{color:#c7d2fe;font-weight:700}.mainCol{flex:1;min-width:0;display:flex;flex-direction:column}#topbar{position:sticky;top:0;z-index:60;background:#f7f8fad9;-webkit-backdrop-filter:blur(10px) saturate(1.4);backdrop-filter:blur(10px) saturate(1.4);border-bottom:1px solid var(--line);padding:14px 28px;display:flex;align-items:center;gap:14px}#topbar .vt{font-weight:700;font-size:1.05rem;letter-spacing:-.01em}#topbar .vs{color:var(--soft);font-size:.82rem;margin-left:2px}#menuBtn{display:none;border:1px solid var(--line2);background:#fff;border-radius:9px;width:36px;height:36px;font-size:1rem;cursor:pointer;box-shadow:var(--sh)}.tutorBtn{margin-left:auto;border:none;background:var(--accent);color:#fff;height:40px;padding:0 17px;border-radius:var(--rs);font-weight:600;font-size:.85rem;cursor:pointer;display:flex;align-items:center;gap:8px;transition:.15s;line-height:1;box-shadow:0 1px 2px #4f46e51a,0 4px 10px -2px #4f46e559}.tutorBtn:hover{background:var(--accent2);transform:translateY(-1px);box-shadow:0 2px 4px #4f46e526,0 8px 16px -2px #4f46e566}.tutorBtn:active{transform:translateY(0)}.tutorBtn .spark{width:7px;height:7px;border-radius:50%;background:#a7f3d0;animation:pulse 2.2s infinite}@keyframes pulse{50%{opacity:.3;transform:scale(.8)}}#content{flex:1;padding:28px;max-width:1060px;width:100%;margin:0 auto}.view{display:none}.view.on{display:block;animation:fadeIn .3s cubic-bezier(.2,.7,.3,1)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.block{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px;margin-bottom:18px;box-shadow:var(--sh);transition:box-shadow .2s}.block h3{font-size:1.04rem;display:flex;align-items:center;gap:10px;margin-bottom:18px;flex-wrap:wrap;letter-spacing:-.01em}.chip{font-family:IBM Plex Mono;font-size:.62rem;letter-spacing:.07em;color:var(--accent);background:var(--accent-soft);border:1px solid var(--accent-line);padding:4.5px 10px;border-radius:6px;font-weight:700}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:var(--rs);height:42px;padding:0 19px;font-weight:600;font-size:.88rem;cursor:pointer;transition:.15s cubic-bezier(.2,.7,.3,1);text-decoration:none;line-height:1;white-space:nowrap}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn.solid{background:var(--accent);color:#fff;box-shadow:0 1px 2px #4f46e51a,0 4px 10px -2px #4f46e559}.btn.solid:hover{background:var(--accent2);box-shadow:0 2px 4px #4f46e526,0 8px 20px -4px #4f46e573}.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line2);box-shadow:var(--sh-xs)}.btn.ghost:hover{border-color:var(--faint);box-shadow:var(--sh)}.miniBtn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line2);background:#fff;border-radius:var(--rs);height:36px;padding:0 14px;font-size:.8rem;font-weight:600;cursor:pointer;color:var(--ink);transition:.13s cubic-bezier(.2,.7,.3,1);white-space:nowrap;line-height:1}.miniBtn:disabled{opacity:.45;cursor:default;transform:none!important;box-shadow:none!important}.miniBtn:hover{border-color:var(--faint);box-shadow:var(--sh);transform:translateY(-1px)}.miniBtn:active{transform:translateY(0)}.miniBtn.accent{background:var(--accent);color:#fff;border-color:transparent;box-shadow:0 1px 2px #4f46e51a,0 3px 8px -1px #4f46e54d}.miniBtn.accent:hover{background:var(--accent2);box-shadow:0 2px 4px #4f46e526,0 6px 16px -2px #4f46e566}.pill{background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-size:.72rem;font-weight:600;color:var(--soft)}.crumb{display:flex;align-items:center;gap:8px;font-size:.82rem;color:var(--soft);margin-bottom:14px;font-weight:500}.crumb button{border:none;background:none;color:var(--accent);font-weight:600;cursor:pointer;font-size:.82rem;padding:2px}.crumb button:hover{text-decoration:underline}.inlineLink{border:none;background:none;color:var(--accent);font-weight:700;cursor:pointer;font-size:inherit;font-family:inherit;padding:0;text-decoration:none}.inlineLink:hover{text-decoration:underline}.progTrack{height:7px;background:var(--bg);border:1px solid var(--line);border-radius:99px;overflow:hidden}.progFill{height:100%;width:0%;background:var(--accent);border-radius:99px;transition:width .35s ease}.contCard{position:relative;overflow:hidden;background:radial-gradient(120% 160% at 100% 0%,#6d5ff4,#4f46e5 42%,#362fa8);color:#fff;border-radius:var(--rl);padding:26px 30px;margin-bottom:20px;display:flex;align-items:center;gap:20px;flex-wrap:wrap;box-shadow:0 1px 2px #312a8c33,0 20px 40px -12px #312a8c80}.contCard:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;opacity:.5;background-image:radial-gradient(rgba(255,255,255,.12) 1px,transparent 1px);background-size:18px 18px;-webkit-mask-image:radial-gradient(480px 240px at 85% 0%,#000,transparent 75%);mask-image:radial-gradient(480px 240px at 85% 0%,#000,transparent 75%)}.contCard>div{position:relative}.contCard .eyebrow{font-family:IBM Plex Mono;font-size:.64rem;letter-spacing:.18em;color:#d6d2ff;font-weight:700}.contCard h3{font-size:1.3rem;margin-top:7px;letter-spacing:-.02em}.contCard p{color:#d9d5ff;font-size:.86rem;margin-top:5px;line-height:1.55}.contCard .btn{margin-left:auto;background:#fff;color:var(--accent2);position:relative;box-shadow:0 4px 14px #0000002e}.contCard .btn:hover{background:#f5f4ff;transform:translateY(-1px)}@media (max-width:700px){.contCard .btn{margin-left:0}}.statRow{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-bottom:18px}.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;box-shadow:var(--sh);transition:.15s}.stat:hover{box-shadow:var(--sh2);transform:translateY(-1px)}.stat .n{font-weight:800;font-size:1.4rem;letter-spacing:-.02em}.stat .l{font-size:.7rem;color:var(--soft);letter-spacing:.05em;text-transform:uppercase;margin-top:3px;font-weight:600}.unitList{display:grid;gap:9px}.unitRow{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:15px 18px;cursor:pointer;transition:.16s cubic-bezier(.2,.7,.3,1);box-shadow:var(--sh);text-align:left;width:100%}.unitRow:hover{border-color:var(--accent-line);transform:translate(2px);box-shadow:var(--sh2)}.unitRow .n{font-family:IBM Plex Mono;font-size:.68rem;color:var(--faint);font-weight:700;flex:0 0 24px}.unitRow .body{flex:1;min-width:0}.unitRow .body b{font-size:.92rem;display:block}.unitRow .body span{font-size:.78rem;color:var(--soft);display:block;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.unitRow .track{flex:0 0 120px}.unitRow .pctT{flex:0 0 52px;text-align:right;font-family:IBM Plex Mono;font-size:.76rem;font-weight:700;color:var(--soft)}.unitRow .pctT.full{color:var(--green)}.unitRow .go{color:var(--accent);font-weight:700;transition:.15s}.unitRow:hover .go{transform:translate(2px)}ul.suggList{list-style:none;display:grid;gap:8px}ul.suggList li{border:1px solid var(--line);border-radius:var(--r);padding:13px 16px;background:var(--surface);font-size:.86rem;line-height:1.55;cursor:pointer;transition:.15s;display:flex;align-items:center;gap:8px;box-shadow:var(--sh)}ul.suggList li:hover{border-color:var(--accent-line);box-shadow:var(--sh2);transform:translateY(-1px)}ul.suggList li .go{margin-left:auto;font-weight:800;color:var(--accent)}.unitHead{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px 28px;margin-bottom:18px;box-shadow:var(--sh);overflow:hidden}.unitHead:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--uc,var(--accent))}.unitHead .num{font-family:IBM Plex Mono;color:var(--uc,var(--accent));font-size:.66rem;letter-spacing:.16em;font-weight:700}.unitHead h2{font-size:1.55rem;margin-top:7px;letter-spacing:-.02em}.unitHead p{margin-top:7px;color:var(--soft);max-width:46rem;line-height:1.6;font-size:.9rem}.unitHead .actions{margin-top:18px;display:flex;gap:10px;flex-wrap:wrap}dl.vocab{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:10px}dl.vocab div{background:var(--bg);border:1px solid var(--line);border-left:3px solid var(--uc,var(--accent));border-radius:10px;padding:12px 15px;transition:.13s}dl.vocab div:hover{border-color:var(--line2);transform:translateY(-1px)}dl.vocab dt{font-weight:700;font-size:.86rem}dl.vocab dd{color:var(--soft);font-size:.8rem;line-height:1.55;margin-top:3px}ul.thms{list-style:none;display:grid;gap:9px}ul.thms li{border:1px solid var(--line);border-radius:10px;padding:13px 16px;background:var(--bg);font-size:.87rem;line-height:1.65}ul.thms li b{color:var(--accent)}ul.thms li .mono,.lsBody .mono,.step p .mono,.lsQ .mono,.prProblem .mono{background:#fff;border:1px solid var(--line);border-radius:6px;padding:1.5px 7px;font-size:.82rem}.exProblem{background:linear-gradient(180deg,var(--amber-soft),#fff);border:1px solid #F3D9AE;border-radius:12px;padding:15px 18px;font-size:.93rem;line-height:1.6;font-weight:500;box-shadow:var(--sh-xs)}.steps{margin-top:14px;display:grid;gap:9px}.step{display:none;gap:13px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--surface);box-shadow:var(--sh-xs);animation:fadeIn .3s ease}.step.on{display:flex}.step .n{flex:0 0 auto;width:27px;height:27px;border-radius:8px;background:var(--uc,var(--accent));color:#fff;display:grid;place-items:center;font-family:IBM Plex Mono;font-size:.72rem;font-weight:600}.step p{font-size:.88rem;line-height:1.65;padding-top:3px}.stepCtrl{margin-top:14px;display:flex;gap:9px;align-items:center;flex-wrap:wrap}.stepCtrl .done{display:none;color:var(--green);font-weight:700;font-size:.84rem}.prob{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden;background:var(--surface);box-shadow:var(--sh-xs);transition:.13s}.prob:hover{box-shadow:var(--sh)}.prob .q{padding:15px 17px 10px;font-size:.9rem;line-height:1.6;display:flex;gap:11px;align-items:flex-start}.prob .q .n{flex:0 0 auto;font-family:IBM Plex Mono;color:var(--uc,var(--accent));font-weight:600;font-size:.68rem;border:1px solid var(--line);background:var(--bg);padding:3px 7px;border-radius:6px;margin-top:1px}.prob .bar{display:flex;gap:8px;padding:3px 17px 14px}.prob .ans{display:none;border-top:1px dashed var(--line);background:var(--green-soft);padding:13px 17px;font-size:.85rem;line-height:1.6}.prob .ans.on{display:block;animation:fadeIn .25s}.prob .ans b{color:var(--green)}.jmapLinks{display:flex;gap:8px;flex-wrap:wrap}.jmapLinks a{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line2);background:#fff;border-radius:9px;padding:9px 14px;font-size:.8rem;font-weight:600;color:var(--ink);text-decoration:none;box-shadow:var(--sh);transition:.13s}.jmapLinks a:hover{border-color:var(--accent);color:var(--accent)}.jmapNote{font-size:.8rem;color:var(--soft);margin-top:12px;line-height:1.6}.lsCount{margin-left:auto;font-family:IBM Plex Mono;font-size:.68rem;color:var(--soft);background:var(--bg);border:1px solid var(--line);padding:4px 10px;border-radius:999px;font-weight:600}.lsIntro{color:var(--soft);font-size:.88rem;line-height:1.6;margin-bottom:12px;border-left:3px solid var(--uc,var(--accent));padding-left:12px}.lsCard{margin-top:14px;animation:fadeIn .3s ease}.lsArt{display:flex;justify-content:center;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:14px;margin-bottom:14px}.lsArt svg{max-width:430px;width:100%;height:auto}.lsTitle{font-size:1.08rem;margin-bottom:9px}.lsBody{font-size:.92rem;line-height:1.75}.lsCtrl{margin-top:16px;display:flex;gap:9px;flex-wrap:wrap;align-items:center}.lsCheckTag{font-family:IBM Plex Mono;font-size:.64rem;letter-spacing:.14em;color:var(--accent);font-weight:700;margin-bottom:9px}.lsQ{font-size:.96rem;font-weight:600;line-height:1.6;margin-bottom:12px}.lsChoices{display:grid;gap:8px;max-width:560px}.lsChoice{text-align:left;border:1.5px solid var(--line2);background:#fff;border-radius:11px;padding:12px 16px;font-size:.88rem;font-weight:500;cursor:pointer;transition:.14s cubic-bezier(.2,.7,.3,1);box-shadow:var(--sh-xs);color:var(--ink)}.lsChoice:hover:not(:disabled){border-color:var(--accent);box-shadow:var(--sh)}.lsChoice:disabled{cursor:default}.lsChoice.good{border-color:var(--green);background:var(--green-soft);font-weight:700;box-shadow:var(--sh-xs)}.lsChoice.bad{border-color:var(--red);background:var(--red-soft);opacity:.85;box-shadow:var(--sh-xs)}.lsFeed{margin-top:12px;font-size:.86rem;line-height:1.65;border-radius:11px}.lsFeed.good{background:var(--green-soft);border:1px solid var(--green-line);padding:12px 15px}.lsFeed.bad{background:var(--red-soft);border:1px solid var(--red-line);padding:12px 15px}.lsDoneBig{font-weight:800;font-size:1.3rem;margin-bottom:9px;letter-spacing:-.01em}.lsNextList{margin:10px 0 4px 20px;display:grid;gap:7px;font-size:.88rem;line-height:1.6}.qzReview{margin-top:14px;display:grid;gap:9px}.qzMiss{border:1px solid var(--line);border-left:3px solid var(--red);border-radius:11px;padding:12px 15px;font-size:.85rem;line-height:1.6;background:var(--bg)}.qzMiss .qzWhy{color:var(--soft);margin-top:5px;font-size:.82rem}.skillGrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px}.skillCard{text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:15px 17px;cursor:pointer;transition:.16s cubic-bezier(.2,.7,.3,1);box-shadow:var(--sh);display:flex;flex-direction:column;gap:6px}.skillCard:hover{border-color:var(--accent-line);transform:translateY(-2px);box-shadow:var(--sh2)}.skillCard .code{font-family:IBM Plex Mono;font-size:.64rem;color:var(--faint);font-weight:700;letter-spacing:.02em}.skillCard b{font-size:.87rem;line-height:1.4}.skillCard .st{font-size:.74rem;font-weight:600;color:var(--soft)}.skillCard.done{border-color:var(--green-line);background:var(--green-soft)}.skillCard.done .st{color:var(--green)}.prProblem{background:var(--bg);border:1px solid var(--line);border-radius:var(--r);padding:19px 21px;font-size:1rem;line-height:1.7;margin:14px 0}.prAnswerRow{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.prAnswerRow input{border:1.5px solid var(--line2);border-radius:9px;padding:11px 14px;font-size:.95rem;font-family:IBM Plex Mono;width:min(300px,100%);background:#fff}.prAnswerRow input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}.prStreak{display:flex;gap:7px;align-items:center;margin:12px 0 4px}.prStreak .dot{width:26px;height:26px;border-radius:50%;border:2px solid var(--line2);display:grid;place-items:center;font-size:.72rem;font-weight:700;color:var(--faint)}.prStreak .dot.hit{background:var(--green);border-color:var(--green);color:#fff}.prStreak .lbl{font-size:.78rem;color:var(--soft);font-weight:600;margin-left:4px}.prSpin{display:inline-block;width:14px;height:14px;border:2.5px solid var(--accent-soft);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;vertical-align:-2px}@keyframes spin{to{transform:rotate(360deg)}}.labShell{background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh);padding:22px;display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:start}@media (max-width:900px){.labShell{grid-template-columns:1fr}}#labSvg{background:#fff;border:1px solid var(--line);border-radius:12px;touch-action:manipulation;cursor:crosshair;max-width:100%;height:auto}.labPanel{display:flex;flex-direction:column;gap:12px}.labModes{display:flex;gap:5px;flex-wrap:wrap;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:5px}.labModes button{border:none;background:none;border-radius:7px;padding:7px 12px;font-size:.76rem;font-weight:600;cursor:pointer;color:var(--soft);transition:.13s}.labModes button:hover{color:var(--ink)}.labModes button.on{background:var(--accent);color:#fff}.labTask{border:1px dashed var(--accent-line);border-radius:10px;background:var(--accent-soft);padding:13px 16px;font-size:.9rem;line-height:1.6;min-height:60px}.labFeed{font-size:.86rem;font-weight:600;min-height:24px}.labFeed.good{color:var(--green)}.labFeed.bad{color:var(--red)}.labBtns{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.labRead{font-family:IBM Plex Mono;font-size:.76rem;background:var(--side);color:#cbd5e1;border-radius:10px;padding:13px 15px;line-height:1.8;white-space:pre-wrap}.streak{margin-left:auto;font-family:IBM Plex Mono;font-size:.74rem;color:var(--soft);background:var(--bg);border:1px solid var(--line);padding:6px 12px;border-radius:999px}.streak b{color:var(--red);font-size:.95rem}.wbShell{background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh);padding:18px;display:flex;flex-direction:column;gap:12px}.wbBar{display:flex;gap:6px;flex-wrap:wrap;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:11px;padding:8px}.wbBar .sep{width:1px;align-self:stretch;background:var(--line2);margin:2px 4px}.toolBtn{border:1px solid var(--line2);background:#fff;border-radius:var(--rs);height:36px;min-width:36px;padding:0 13px;display:inline-flex;align-items:center;justify-content:center;gap:6px;cursor:pointer;font-size:.8rem;font-weight:600;color:var(--ink);transition:.13s;white-space:nowrap;line-height:1}.toolBtn:hover{border-color:var(--accent);color:var(--accent)}.toolBtn.on{background:var(--side);color:#fff;border-color:var(--side)}.swatch{width:24px;height:24px;border-radius:50%;border:2.5px solid #fff;box-shadow:0 0 0 1.5px var(--line2);cursor:pointer;transition:.12s;flex:0 0 auto}.swatch.on{box-shadow:0 0 0 2.5px var(--ink);transform:scale(1.1)}.wbBar input[type=file]{display:none}.wbBar label.miniBtn{display:inline-flex;align-items:center;gap:6px}.wbStage{position:relative;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;touch-action:none;user-select:none;-webkit-user-select:none;box-shadow:inset 0 0 0 1px #10182805}.wbStage canvas{display:block;width:100%;height:auto}#aiCanvas,#inkCanvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}#aiCanvas{pointer-events:none}.wbHintTag{position:absolute;top:10px;left:10px;background:#0f172ad9;color:#fff;font-size:.7rem;font-weight:600;padding:6px 10px;border-radius:7px;pointer-events:none}.wbFoot{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.wbFoot .pgNav{display:none;align-items:center;gap:7px;font-family:IBM Plex Mono;font-size:.74rem;color:var(--soft)}.wbGrade{background:var(--accent);color:#fff;border:none;border-radius:var(--rs);height:42px;padding:0 18px;font-weight:600;font-size:.86rem;cursor:pointer;display:inline-flex;gap:8px;align-items:center;line-height:1;box-shadow:0 1px 2px #4f46e51a,0 4px 10px -2px #4f46e559;transition:.13s}.wbGrade:hover{background:var(--accent2);transform:translateY(-1px)}.wbGrade:disabled{opacity:.5;cursor:default;transform:none}.wbStatus{font-size:.8rem;font-weight:600;color:var(--soft)}#tutor{position:fixed;right:14px;top:14px;bottom:14px;width:min(430px,calc(100% - 28px));background:#fff;border:1px solid var(--line);border-radius:16px;z-index:120;display:flex;flex-direction:column;overflow:hidden;transform:translate(calc(100% + 30px));transition:transform .28s cubic-bezier(.2,.8,.25,1);box-shadow:0 8px 40px #1018282e}#tutor.open{transform:none}.tHead{background:var(--side);color:#fff;padding:14px 18px;display:flex;align-items:center;gap:11px}.tAva{width:36px;height:36px;border-radius:10px;background:var(--accent);display:grid;place-items:center;font-size:1.05rem;color:#fff}.tHead .tt{flex:1}.tHead h3{font-size:.92rem}.tHead .scope{font-family:IBM Plex Mono;font-size:.58rem;color:#94a3b8;display:block;margin-top:3px;letter-spacing:.08em}.tHead .closeBtn{background:#ffffff1a;border:none;color:#fff;font-size:1rem;cursor:pointer;line-height:1;width:30px;height:30px;border-radius:8px;transition:.13s}.tHead .closeBtn:hover{background:#fff3}#tMsgs{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;background:var(--bg)}.msg{max-width:88%;padding:11px 14px;border-radius:13px;font-size:.86rem;line-height:1.6;white-space:pre-wrap;word-wrap:break-word}.msg.user{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px}.msg.bot{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px;box-shadow:var(--sh)}.typing{display:flex;gap:5px;padding:13px 15px}.typing span{width:6px;height:6px;border-radius:50%;background:var(--faint);animation:bounce 1.2s infinite}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes bounce{30%{transform:translateY(-5px);opacity:.5}}.tSugg{padding:9px 14px 3px;display:flex;gap:6px;flex-wrap:wrap;background:var(--bg)}.tSugg button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 12px;font-size:.71rem;cursor:pointer;font-weight:600;color:var(--soft);transition:.13s;box-shadow:var(--sh)}.tSugg button:hover{border-color:var(--accent);color:var(--accent)}.tInput{display:flex;gap:8px;padding:12px 14px;border-top:1px solid var(--line);background:#fff}.tInput textarea{flex:1;resize:none;border:1px solid var(--line2);border-radius:10px;padding:10px 13px;font-family:Inter;font-size:.86rem;height:46px;outline:none;transition:.13s;background:var(--bg)}.tInput textarea:focus{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px var(--accent-soft)}.tInput button{border:none;background:var(--accent);color:#fff;border-radius:10px;padding:0 17px;font-weight:600;cursor:pointer;transition:.13s}.tInput button:hover{background:#4338ca}.tInput button:disabled{opacity:.45;cursor:default}@media (max-width:900px){#sidebar{position:fixed;left:0;top:0;bottom:0;z-index:100;transform:translate(-100%);transition:transform .25s ease;height:100vh}#sidebar.open{transform:none;box-shadow:0 0 60px #0006}#menuBtn{display:grid;place-items:center}#content{padding:16px}#tutor{right:0;left:0;top:auto;bottom:0;width:100%;height:84dvh;border-radius:16px 16px 0 0;transform:translateY(105%)}#tutor.open{transform:none}.unitRow .track{display:none}}.lsPage{margin-top:16px;display:grid;gap:0}.lsSec{padding:20px 0 22px;border-bottom:1px solid var(--line)}.lsSec:first-child{padding-top:8px}.lsSecN{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:8px;background:var(--uc,var(--accent));color:#fff;font-size:.72rem;font-weight:600;margin-right:8px;vertical-align:-5px}.lsCheck{background:var(--accent-soft);border:1px solid var(--accent-line);border-radius:12px;padding:16px 18px;margin:20px 0}.lsCheck .lsChoices{background:transparent}.lsCheck .lsChoice{background:#fff}.lsFoot{margin-top:20px;padding:14px 17px;border-radius:10px;background:var(--bg);border:1px dashed var(--line2);font-size:.88rem;line-height:1.7}.lsFoot.done{background:var(--green-soft);border-color:var(--green-line)}.msg.bot a{color:var(--accent);font-weight:600;word-break:break-all}.msg.user a{color:#c7d2fe;word-break:break-all}.tIconBtn{background:#ffffff1a;border:none;color:#fff;font-size:.95rem;cursor:pointer;line-height:1;width:32px;height:32px;border-radius:8px;transition:.13s;flex:0 0 auto}.tIconBtn:hover{background:#ffffff38}.tIconBtn.on{background:var(--accent)}#tBody{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden}#tChatCol{flex:1;min-height:0;display:flex;flex-direction:column}#tBoardCol{display:none;flex-direction:column;gap:8px;padding:12px;border-top:1px solid var(--line);background:var(--bg);flex:0 0 auto}#tutor.boardOpen #tBoardCol{display:flex}#tutor.boardOpen #tChatCol{flex:0 0 auto;max-height:34vh}.tbBar{display:flex;gap:6px;align-items:center;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:10px;padding:7px}#tbStage{position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;touch-action:none;height:220px}#tbStage canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}#tbAiCanvas{pointer-events:none}#tutor.expanded{right:0;left:0;top:0;bottom:0;width:100%;height:100%;border-radius:0}#tutor.expanded #tBody{flex-direction:row}#tutor.expanded #tChatCol{flex:0 0 420px;max-height:none;border-right:1px solid var(--line)}#tutor.expanded #tBoardCol{flex:1;border-top:none;max-height:none}#tutor.expanded #tbStage{height:100%;flex:1}#tutor.expanded.boardOpen #tBoardCol{display:flex}#tutor.expanded:not(.boardOpen) #tChatCol{flex:1;border-right:none}@media (max-width:900px){#tutor.expanded #tBody{flex-direction:column}#tutor.expanded #tChatCol{flex:0 0 auto;max-height:40vh;border-right:none;border-bottom:1px solid var(--line)}}.skillSubhead{font-size:.72rem;font-weight:700;color:var(--soft);text-transform:uppercase;letter-spacing:.06em;margin:14px 0 8px}.skillSubhead:first-of-type{margin-top:2px}.tutorBtn.ghostTab{margin-left:auto;background:#fff;color:var(--ink);border:1px solid var(--line2);box-shadow:none}.tutorBtn.ghostTab:hover{border-color:var(--accent);color:var(--accent);background:#fff}.tutorBtn:not(.ghostTab){margin-left:8px}.dashProgLine{font-size:.82rem;color:var(--soft);font-weight:600;margin:2px 2px 16px}.wtToolbar{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin-bottom:10px;background:var(--bg);border:1px solid var(--line);border-radius:11px;padding:8px}.wtStage{position:relative;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;touch-action:none;user-select:none;-webkit-user-select:none;box-shadow:inset 0 0 0 1px #10182805}.wtStage canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:block}#wtBgCanvas{position:relative}#wtAnimCanvas{pointer-events:none}.wtNav{display:flex;gap:9px;align-items:center;margin-top:10px;flex-wrap:wrap}.wtGallery{margin-top:14px}.wtGalHead{font-size:.74rem;font-weight:600;color:var(--soft);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}.wtGalStrip{display:flex;gap:8px;flex-wrap:wrap}.wtThumb{border:1.5px solid var(--line2);background:#fff;border-radius:8px;padding:2px;cursor:pointer;width:84px;height:60px;overflow:hidden;transition:.13s}.wtThumb:hover{border-color:var(--accent)}.wtThumb.on{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}.wtThumb img{width:100%;height:100%;object-fit:cover;border-radius:5px;display:block}.wtLightbox{margin-top:12px;border:1px solid var(--line);border-radius:10px;padding:10px;background:var(--bg)}.wtLightbox img{max-width:100%;border-radius:8px;display:block;border:1px solid var(--line)}.wtLightboxBar{display:flex;gap:8px;margin-top:10px}.actionsCaption{font-size:.8rem;color:var(--soft);margin-top:10px;line-height:1.55}.unitTabs{position:sticky;top:69px;z-index:40;display:flex;align-items:center;gap:2px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;background:#ffffffe6;-webkit-backdrop-filter:blur(10px) saturate(1.4);backdrop-filter:blur(10px) saturate(1.4);border:1px solid var(--line);border-radius:12px;padding:6px;margin-bottom:16px;box-shadow:var(--sh)}.unitTabs::-webkit-scrollbar{display:none}.uTab{flex:0 0 auto;display:inline-flex;align-items:center;border:none;background:none;color:var(--soft);font-size:.79rem;font-weight:600;height:34px;padding:0 13px;border-radius:8px;cursor:pointer;transition:.14s;white-space:nowrap;position:relative;line-height:1}.uTab:hover{background:var(--bg);color:var(--ink)}.uTab:active{background:var(--line)}.uTab.on{background:var(--accent-soft);color:var(--accent)}.unitTabs .sep{flex:0 0 auto;width:1px;height:20px;background:var(--line2);margin:0 5px}.uTab.accentTab{flex:0 0 auto;margin-left:auto;background:var(--accent-soft);color:var(--accent);font-weight:700;padding-left:14px;padding-right:14px}.uTab.accentTab:hover{background:var(--accent);color:#fff}@media (max-width:700px){.unitTabs{position:static}}.lsDeeper{margin-top:12px}.lsDeeperBtn{font-size:.76rem}.lsDeeperPanel{margin-top:10px;background:var(--bg);border:1px dashed var(--line2);border-radius:9px;padding:13px 15px;font-size:.87rem;line-height:1.7;color:var(--ink)}.acctCard{background:#ffffff0a;border:1px solid var(--side-line);border-radius:var(--r);padding:13px 14px;display:flex;flex-direction:column;gap:11px}.acctRow{display:flex;align-items:center;gap:10px}.acctAvatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#7C6FF0);color:#fff;display:grid;place-items:center;font-size:.84rem;font-weight:700;flex:0 0 auto;box-shadow:0 2px 6px #4f46e566}.acctRowText{display:flex;flex-direction:column;gap:1px;min-width:0}.acctName{color:#fff;font-size:.86rem;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.acctNote{font-size:.72rem;color:#7686a3;line-height:1.5}.acctCard .acctNote{padding:0}.acctSignOut{border:1px solid var(--side-line);background:none;color:#f0a8a8;font-size:.78rem;font-weight:600;padding:8px 12px;border-radius:8px;cursor:pointer;transition:.13s;text-align:center}.acctSignOut:hover{background:#f871711f;border-color:#f871714d}.acctCta{border:none;background:var(--accent);color:#fff;font-size:.82rem;font-weight:700;padding:10px 14px;border-radius:9px;cursor:pointer;transition:.15s;box-shadow:0 2px 8px #4f46e566}.acctCta:hover{background:var(--accent2);transform:translateY(-1px)}.acctForm{display:flex;flex-direction:column;gap:12px;margin-top:14px}.acctLabel{display:flex;flex-direction:column;gap:6px;font-size:.82rem;font-weight:600;color:var(--soft)}.acctLabel input{border:1.5px solid var(--line2);border-radius:9px;padding:10px 13px;font-size:.92rem;font-family:Inter;color:var(--ink);background:#fff}.acctLabel input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}.fsBar{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.fsBar input{flex:1;min-width:240px;height:42px;border:1.5px solid var(--line2);border-radius:var(--rs);padding:0 15px;font-size:.92rem;font-family:Inter;color:var(--ink);background:#fff;transition:.15s}.fsBar input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}.lsChoice.sel{border-color:var(--accent);background:var(--accent-soft);font-weight:700}.exScoreRow{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.qzMiss.okItem{border-left-color:var(--green);background:var(--green-soft)}.readyCard{display:flex;align-items:center;gap:16px;flex-wrap:wrap;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin-bottom:18px;box-shadow:var(--sh)}.readyText{flex:1;min-width:200px;display:flex;flex-direction:column;gap:3px}.readyText b{font-size:.95rem}.readyText span{font-size:.8rem;color:var(--soft);line-height:1.5}.ring{flex:0 0 auto}#lbBgCanvas{position:relative}#lbAnimCanvas{pointer-events:none}#lbNav{position:sticky;bottom:14px;z-index:30}#lbNav .wtNav{background:#fffffff0;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:12px;padding:8px 10px;box-shadow:var(--sh2);margin-top:12px}