:root{--bg:#f5f5f8;--surface:#fff;--col:#ebecf3;--card:#fff;--fg:#1a1c2b;--fg2:#2c3047;--muted:#555a72;--faint:#6a6f88;--line:#e3e4ec;--line-strong:#d9dbe6;--accent:#3442b8;--accent-hover:#2a379c;--accent-soft:#eef0fb;--on-accent:#fff;--accent-2:#c3c8f0;--accent-3:#8590e0;--strong:#1f2563;--on-strong:#fff;--high:#9c300c;--high-soft:#fbe6dc;--med:#3442b8;--med-soft:#eef0fb;--low:#555a72;--low-soft:#ebecf3;--warn:#8a5300;--warn-soft:#fdf1dc;--ok:#1d7a3a;--danger:#b42318;--danger-soft:#fde8e6;--shadow:0 10px 30px #1a1c2b24;--display:"Space Grotesk", "Segoe UI", system-ui, sans-serif;--body:"Manrope", "Segoe UI", system-ui, sans-serif;--mono:"JetBrains Mono", ui-monospace, Consolas, monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--bg:#10121a;--surface:#191c28;--col:#151823;--card:#222637;--fg:#e8e9f2;--fg2:#cfd2e2;--muted:#a3a7bf;--faint:#8d92ab;--line:#2a2e40;--line-strong:#383d55;--accent:#8b96ff;--accent-hover:#a5adff;--accent-soft:#262b48;--on-accent:#10132e;--accent-2:#3f4785;--accent-3:#6570d6;--strong:#dfe2ff;--on-strong:#151838;--high:#ff9a6e;--high-soft:#3d2219;--med:#8b96ff;--med-soft:#262b48;--low:#a3a7bf;--low-soft:#222637;--warn:#e8c45a;--warn-soft:#3a3118;--ok:#6fd28d;--danger:#ff8a7a;--danger-soft:#3d1c19;--shadow:0 10px 30px #00000073;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*{box-sizing:border-box}html,body{margin:0}body{background:var(--bg);color:var(--fg);font:15px/1.5 var(--body)}h1,h2,h3,h4{font-family:var(--display);text-wrap:balance;margin:0;line-height:1.2}h2{font-size:19px}h3{font-size:16px}p{margin:0}a{color:var(--accent)}.muted{color:var(--muted)}.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:12.5px}.num{font-variant-numeric:tabular-nums}.small{font-size:13px}.boot{color:var(--muted);padding:40px 16px}button,input,select,textarea{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}input,select,textarea{background:var(--surface);border:1px solid var(--line-strong);border-radius:12px;min-width:0;padding:8px 12px}select{border-radius:99px;padding-inline:14px;font-size:14px;font-weight:600}textarea{resize:vertical;width:100%;line-height:1.55}button{cursor:pointer;border:1px solid #0000;border-radius:99px;padding:8px 16px;font-size:14px;font-weight:700}button:disabled{opacity:.55;cursor:default}.primary{background:var(--accent);color:var(--on-accent)}.primary:hover:not(:disabled){background:var(--accent-hover)}.ghost{background:var(--surface);border-color:var(--line-strong)}.ghost:hover:not(:disabled){border-color:var(--accent)}.danger{background:var(--danger);color:var(--surface)}.danger-text{color:var(--danger)}.link{color:var(--accent);background:0 0;border:0;border-radius:4px;padding:0;font-weight:700}.chip{background:var(--surface);border:1px solid var(--line-strong);border-radius:999px;padding:6px 14px;font-size:13px}.chip:hover{border-color:var(--accent)}.chip[aria-pressed=true]{background:var(--strong);border-color:var(--strong);color:var(--on-strong)}.stack{gap:12px;display:grid}.stack-lg{gap:28px;display:grid}.narrow{max-width:560px}.row-actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.split{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:12px;display:flex}.field{gap:4px;display:grid}.field>span{color:var(--muted);font-size:13px;font-weight:600}.check{align-items:center;gap:8px;display:flex}.check input{width:16px;height:16px;accent-color:var(--accent)}.error{color:var(--danger)}.ok{color:var(--ok)}.empty{color:var(--muted);font-style:italic}.panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;gap:14px;padding:20px 22px;display:grid}.danger-zone{border-color:var(--danger-soft)}html,body,#root{height:100%}.app{grid-template-rows:auto minmax(0,1fr);height:100%;display:grid}.topbar{background:var(--surface);border-bottom:1px solid var(--line);align-items:center;gap:20px;min-height:60px;padding:0 16px;display:flex}.brand{font-family:var(--display);align-items:center;gap:10px;font-size:18px;font-weight:700;display:flex}.brand svg{color:var(--accent);flex:none}.brand{white-space:nowrap}.brand.big{font-size:26px}.top-actions{align-items:center;gap:8px;margin-left:auto;display:flex}.mobile-only{display:none}.banner{background:var(--danger-soft);color:var(--danger);border-radius:12px;justify-content:space-between;gap:16px;padding:10px 16px;display:flex}.body{grid-template-columns:var(--chat-w,380px) 16px minmax(0, 1fr);min-height:0;padding:16px;display:grid}.body.chat-collapsed{grid-template-columns:52px 16px minmax(0,1fr)}.main{grid-template-rows:auto auto minmax(0,1fr);grid-template-columns:minmax(0,1fr);gap:16px;min-width:0;min-height:0;display:grid}.view{min-height:0;overflow-y:auto}.page{padding-bottom:48px}.resizer{cursor:col-resize;place-items:center;display:grid}.resizer:after{content:"";background:var(--line-strong);border-radius:99px;width:4px;height:44px}.resizer:hover:after,.resizer:focus-visible:after,.resizing .resizer:after{background:var(--accent)}.resizer:focus-visible{outline-offset:-2px;border-radius:8px}.resizing{cursor:col-resize;-webkit-user-select:none;user-select:none}.rail{background:var(--surface);border:1px solid var(--line);border-radius:16px;flex-direction:column;grid-column:1;align-items:center;gap:12px;padding-top:10px;display:flex}.rail-label{writing-mode:vertical-rl;color:var(--muted);letter-spacing:.1em;text-transform:uppercase;font-size:12px;font-weight:800}.icon-btn{width:36px;height:36px;color:var(--muted);background:0 0;border:0;border-radius:99px;flex:none;place-items:center;padding:0;display:inline-grid}.icon-btn:hover,.icon-btn[aria-expanded=true]{background:var(--accent-soft);color:var(--accent)}.tabbar{background:var(--surface);border:1px solid var(--line);z-index:5;border-radius:16px;align-items:center;gap:2px;min-height:54px;padding:0 8px;display:flex;position:relative}.tab-sep{background:var(--line);flex:none;width:1px;height:22px;margin:0 6px}.tab{min-height:52px;color:var(--muted);background:0 0;border:0;border-radius:0;flex:none;align-items:center;gap:8px;max-width:240px;padding:0 14px;font-size:14px;font-weight:700;display:inline-flex;box-shadow:inset 0 -3px #0000}.tab:hover{color:var(--fg)}.tab[aria-selected=true]{color:var(--fg);box-shadow:inset 0 -3px 0 var(--accent)}.tab.doc{background:var(--bg);min-height:36px;box-shadow:none;color:var(--fg);border-radius:99px;flex:0 auto;min-width:0;margin:0 2px;padding:0 6px 0 14px}.tab.doc .tab-title{font-weight:600}.tab.doc[aria-selected=true]{background:var(--strong);color:var(--on-strong)}.tab.doc[aria-selected=true] .tab-title{font-weight:800}.tab-title{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.tab .x{width:26px;height:26px;color:var(--faint);border-radius:99px;flex:none;place-items:center;font-size:16px;line-height:1;display:grid}.tab .x:hover{background:var(--line);color:var(--fg)}.tab.doc[aria-selected=true] .x{color:var(--on-strong);opacity:.75}.tab.doc[aria-selected=true] .x:hover{opacity:1;background:0 0}.pulse{background:var(--accent);border-radius:99px;flex:none;width:7px;height:7px;animation:1.2s ease-in-out infinite pulse}.tab.doc[aria-selected=true] .pulse{background:var(--on-strong)}@keyframes pulse{50%{opacity:.25}}.more{flex:none;display:flex;position:relative}.more-btn.tab{border:1px solid var(--line-strong);min-height:36px;box-shadow:none;border-radius:99px;margin-left:4px;padding:0 12px}.more-btn .cnt{background:var(--accent-soft);color:var(--accent);border-radius:99px;padding:0 7px;font-size:12px}.more-menu{z-index:20;background:var(--surface);border:1px solid var(--line);min-width:260px;max-width:360px;box-shadow:var(--shadow);border-radius:14px;padding:6px;position:absolute;top:calc(100% + 6px);right:0}.more-row{border-radius:10px;align-items:center;display:flex}.more-row:hover{background:var(--bg)}.more-item{text-align:left;text-overflow:ellipsis;white-space:nowrap;background:0 0;border-radius:10px;flex:1;font-weight:600;overflow:hidden}.more-row .x{color:var(--muted);background:0 0;padding:4px 10px}.chat{background:var(--surface);border:1px solid var(--line);border-radius:16px;flex-direction:column;min-width:0;min-height:0;display:flex;overflow:hidden}.chat-head{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:4px;padding:12px 10px 12px 18px;display:flex}.chat-title{justify-items:start;gap:4px;min-width:0;display:grid}.chat-title strong{font-family:var(--display);font-size:17px}.chat-scope{background:var(--accent-soft);max-width:100%;color:var(--accent);white-space:nowrap;text-overflow:ellipsis;border-radius:99px;padding:2px 10px;font-size:12px;font-weight:800;display:block;overflow:hidden}.chat-scope.course{background:var(--accent);color:var(--on-accent);animation:.35s pop}@keyframes pop{0%{opacity:.4;transform:scale(.92)}}.chat-actions{flex:none;gap:2px;display:flex}.chat-history{border-bottom:1px solid var(--line);background:var(--bg);gap:4px;max-height:45vh;padding:10px 12px;display:grid;overflow-y:auto}.hist-row{border:1px solid #0000;border-radius:10px;align-items:center;gap:4px;display:flex}.hist-row:hover{background:var(--surface)}.hist-row.on{background:var(--surface);border-color:var(--accent-2)}.hist-title{text-align:left;background:0 0;border-radius:10px;flex:1;min-width:0;padding:6px 8px;font-weight:600;display:grid}.hist-title .mono{font-size:11px;font-weight:500}.chat-list{flex-direction:column;flex:1;gap:14px;min-height:0;padding:16px 18px;display:flex;overflow-y:auto}.chat-empty{justify-items:start;gap:12px;margin-top:4px;display:grid}.suggestions{gap:6px;width:100%;display:grid}.suggestions .chip{text-align:left;border-radius:18px;padding:8px 14px;font-size:14px;font-weight:600}.suggestions .chip:hover{color:var(--accent)}.bubble{overflow-wrap:anywhere;min-width:0;max-width:100%}.bubble.user{background:var(--accent);max-width:86%;color:var(--on-accent);white-space:pre-wrap;border-radius:14px 14px 4px;align-self:flex-end;padding:9px 13px}.bubble.bot{color:var(--fg2);align-self:stretch}.bubble-meta{align-items:center;gap:10px;margin-top:4px;font-size:12px;display:flex}.bubble-error{color:var(--danger);background:var(--danger-soft);border-radius:10px;flex-wrap:wrap;gap:10px;margin-top:6px;padding:6px 10px;font-size:14px;display:flex}.dots{gap:4px;padding:6px 0;display:inline-flex}.dots i{background:var(--muted);border-radius:99px;width:6px;height:6px;animation:1s infinite pulse}.dots i:nth-child(2){animation-delay:.15s}.dots i:nth-child(3){animation-delay:.3s}.chat-input{border-top:1px solid var(--line);gap:8px;padding:12px 14px 14px;display:grid}.chat-input textarea{resize:none;border-radius:14px;max-height:200px;padding:10px 14px;line-height:1.45}.chat-foot{align-items:center;gap:8px;display:flex}.chat-foot select{background:var(--bg);flex:1;min-width:0;padding:7px 12px;font-size:13px}.md{gap:8px;font-size:15px;line-height:1.55;display:grid}.md>*{margin:0}.md h1,.md h2,.md h3{font-size:16px}.md ul,.md ol{gap:2px;padding-left:20px;display:grid}.md code{font-family:var(--mono);background:var(--bg);border:1px solid var(--line);border-radius:4px;padding:0 4px;font-size:12.5px}.md pre{background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:10px;overflow-x:auto}.md pre code{background:0 0;border:0;padding:0}.md table{border-collapse:collapse;font-size:13.5px;display:block;overflow-x:auto}.md th,.md td{border:1px solid var(--line);padding:4px 8px}.md blockquote{border-left:3px solid var(--line);color:var(--muted);padding-left:10px}.course-page{gap:16px;display:grid}.ch-top{gap:18px;padding:22px 24px}.ch-head{flex-wrap:wrap;align-items:flex-start;gap:16px;display:flex}.mark-lg{background:var(--accent-soft);width:56px;height:56px;color:var(--accent);border:1px solid var(--accent-2);font:700 19px var(--display);letter-spacing:.02em;border-radius:16px;flex:none;place-items:center;display:grid}.ch-id{flex:320px;gap:8px;min-width:0;display:grid}.ch-id h1{overflow-wrap:anywhere;font-size:clamp(22px,2.4vw,28px);line-height:1.15}.badges{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.badge{letter-spacing:.07em;text-transform:uppercase;background:var(--bg);color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:3px 10px;font-size:11px;font-weight:800}.badge.st-doing{background:var(--accent-soft);color:var(--accent);border-color:var(--accent-2)}.badge.st-done{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}.ch-meta{color:var(--muted);flex-wrap:wrap;gap:4px 14px;font-size:14px;display:flex}.ch-meta a{font-weight:700;text-decoration:none}.ch-sum{color:var(--muted);max-width:70ch;font-size:14px}.ch-side{justify-items:center;gap:10px;display:grid}.ring{--p:0;background:conic-gradient(var(--accent) calc(var(--p) * 1%), var(--line) 0);border-radius:99px;flex:none;place-items:center;width:72px;height:72px;display:grid}.ring b{background:var(--surface);width:58px;height:58px;font:700 16px var(--display);border-radius:99px;place-items:center;display:grid}.next{background:var(--accent-soft);border:1px solid var(--accent-2);border-radius:14px;flex-wrap:wrap;align-items:center;gap:12px 16px;padding:16px 18px;display:flex}.next-body{flex:280px;min-width:0}.next .l{letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-size:11px;font-weight:800}.next .nt{font:700 18px var(--display);overflow-wrap:anywhere;margin-top:4px}.next .nm{color:var(--muted);margin-top:4px;font-size:13px}.subtabs{border-bottom:1px solid var(--line);scrollbar-width:thin;align-items:center;gap:4px;display:flex;overflow-x:auto}.stab{min-height:46px;color:var(--muted);white-space:nowrap;background:0 0;border:0;border-radius:0;flex:none;align-items:center;gap:8px;padding:0 14px;font-size:14px;font-weight:700;display:inline-flex;box-shadow:inset 0 -3px #0000}.stab:hover{color:var(--fg)}.stab[aria-selected=true]{color:var(--fg);box-shadow:inset 0 -3px 0 var(--accent)}.stab[aria-selected=true] svg{color:var(--accent)}.stab .cnt{background:var(--col);color:var(--muted);font-variant-numeric:tabular-nums;border-radius:99px;padding:1px 8px;font-size:11px;font-weight:800}.stab-max{margin-left:auto}.sub-body,.sub-stack{gap:16px;display:grid}.stat .lbl{letter-spacing:.1em;text-transform:uppercase;color:var(--faint);font-size:11px;font-weight:800}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));align-items:start;gap:16px;display:grid}.panel-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}.panel .h{font-size:17px}.small-btn{min-height:34px;padding:6px 14px;font-size:13px}.seg{background:var(--bg);border-radius:99px;padding:4px;display:flex}.seg button{min-height:36px;color:var(--muted);white-space:nowrap;background:0 0;border:0;border-radius:99px;flex:1;padding:0 12px;font-size:13px}.seg button:hover{color:var(--fg)}.seg button[aria-pressed=true]{background:var(--accent);color:var(--on-accent)}.seg-pri button[aria-pressed=true].H{background:var(--high-soft);color:var(--high)}.seg-pri button[aria-pressed=true].M{background:var(--accent-soft);color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent-2)}.seg-pri button[aria-pressed=true].L{background:var(--col);color:var(--fg)}.range{accent-color:var(--accent);background:0 0;border:0;padding:8px 0}.mini{gap:6px;margin:0;padding:0;list-style:none;display:grid}.mini li{background:var(--bg);border-radius:10px;align-items:center;gap:10px;padding:8px 10px;font-size:14px;font-weight:600;display:flex}.mini-t{overflow-wrap:anywhere;flex:1;min-width:0}.mini small{color:var(--faint);font-weight:600}.inline-form{background:var(--accent-soft);border-radius:14px;flex-wrap:wrap;align-items:end;gap:10px;padding:14px;display:flex}.inline-form .grow{flex:220px}.narrow-field{width:160px}.empty-board{background:var(--bg);border:1px dashed var(--line-strong);border-radius:14px;justify-items:start;gap:12px;padding:20px;display:grid}.empty-board p{color:var(--muted)}.board.four{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.column h3{font-size:15px}.card.chapter{cursor:grab}.card h4{overflow-wrap:anywhere;font-size:15px;font-weight:600;line-height:1.3}.card.chapter.done h4{color:var(--faint)}.ch-num{letter-spacing:.07em;text-transform:uppercase;color:var(--faint);font-size:11px;font-weight:800}.ch-note{color:var(--muted);background:var(--bg);overflow-wrap:anywhere;white-space:pre-wrap;border-radius:8px;padding:6px 8px;font-size:13px}.solve{background:var(--accent-soft);color:var(--accent);border:0;border-radius:99px;padding:2px 9px;font-size:12px;font-weight:800}.moves button.confirm{width:auto;color:var(--danger);background:var(--danger-soft);padding:0 10px;font-size:12px;font-weight:800}.chapter-edit{cursor:default;gap:10px}.chapter-edit input,.chapter-edit textarea{width:100%}.pair{grid-template-columns:1fr 1fr;gap:8px;display:grid}.notes{font-family:var(--body);min-height:320px;line-height:1.6}.log-form{gap:10px;display:grid}.log-list{flex-direction:column;margin:0;padding:0;list-style:none;display:flex;container-type:inline-size}.log-list li{border-top:1px solid var(--line);grid-template-columns:minmax(0,1fr) auto auto;align-items:baseline;gap:2px 12px;padding:9px 0;font-size:14px;display:grid}.log-list li .n{grid-area:2/1/auto/-1}@container (width>=480px){.log-list li{grid-template-columns:110px 72px minmax(0,1fr) auto}.log-list li .n{grid-area:1/3}}.log-list .d{color:var(--faint)}.log-list b{font-family:var(--display)}.log-list .n{color:var(--fg2);overflow-wrap:anywhere}.docs{flex-wrap:wrap;align-items:flex-start;gap:16px;display:flex}.docs-nav{flex:260px;gap:12px;max-width:340px;padding:16px}.doc-view{flex:999 420px;min-width:0}.doc-empty{text-align:center;place-items:center;min-height:200px}.doc-list{gap:4px;display:grid}.doc-item{text-align:left;color:var(--fg);background:0 0;border:1px solid #0000;border-radius:12px;align-items:center;gap:10px;padding:10px;font-weight:400;display:flex}.doc-item:hover{background:var(--bg)}.doc-item[aria-current=true]{background:var(--accent-soft);border-color:var(--accent-2)}.doc-ic{background:var(--bg);width:32px;height:32px;color:var(--accent);border-radius:10px;flex:none;place-items:center;display:grid}.doc-t{min-width:0;display:grid}.doc-t b{text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:700;overflow:hidden}.doc-t small{color:var(--faint);font-size:12px}.link-form{background:var(--accent-soft);border-radius:12px;gap:10px;padding:12px;display:grid}.doc-url{color:var(--muted);overflow-wrap:anywhere;background:var(--bg);border-radius:8px;padding:8px 10px;font-size:13px}.mono-area{font-family:var(--mono);font-size:13.5px}.btn-link{border-radius:99px;align-items:center;min-height:34px;padding:6px 14px;font-size:13px;font-weight:700;text-decoration:none;display:inline-flex}.tutor-share{color:var(--muted);border-top:1px solid var(--line);padding-top:12px;font-size:13px}.bubble-action{flex-wrap:wrap;align-items:center;gap:8px;margin-top:8px;display:flex}.narrow-wide{max-width:760px}.provider h3{align-items:center;gap:8px;display:flex}.provider-form{gap:14px;display:grid}.nowrap{flex-wrap:nowrap}.nowrap input{flex:1}.small-print ul{gap:6px;margin:0;padding-left:18px;font-size:14px;display:grid}.auth{place-items:center;min-height:100vh;padding:24px 16px;display:grid}.auth-card{gap:18px;width:min(420px,100%);display:grid}.switch{font-size:14px}.summary{grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;display:grid}.stat{background:var(--surface);border:1px solid var(--line);text-align:left;border-radius:16px;gap:2px;padding:14px 18px;font-weight:400;display:grid}.stat b{font-family:var(--display);font-size:24px}.stat span{color:var(--muted);font-size:13px}.stat.as-button[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft)}.toolbar{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.search{background:var(--surface);border:1px solid var(--line-strong);max-width:420px;min-height:44px;color:var(--muted);border-radius:99px;flex:240px;align-items:center;gap:10px;padding:0 16px;display:flex}.search input{background:0 0;border:0;outline:0;flex:1;min-width:0;padding:0}.search:focus-within{outline:2px solid var(--accent);outline-offset:1px}.toolbar select{min-height:44px}.push{margin-left:auto}.with-icon{align-items:center;gap:8px;display:inline-flex}.toolbar .primary{min-height:44px;padding-inline:18px}.board-view{gap:16px;display:grid}.cat-chips{flex-wrap:wrap;gap:8px;display:flex}.cat-chips .chip{min-height:36px;font-weight:700}.board{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));align-items:start;gap:14px;display:grid}.column{background:var(--col);border:2px dashed #0000;border-radius:16px;flex-direction:column;gap:8px;min-height:140px;padding:10px;transition:border-color .15s,background .15s;display:flex}.column.over{border-color:var(--accent);background:var(--accent-soft)}.col-head{align-items:center;gap:8px;padding:4px 6px;display:flex}.col-head h2{font-size:15px}.count{color:var(--accent);background:var(--surface);font-variant-numeric:tabular-nums;border-radius:99px;padding:1px 9px;font-size:12px;font-weight:800}.dot{border:3px solid var(--accent);border-radius:99px;flex:none;width:12px;height:12px}.dot.todo{background:var(--surface)}.dot.doing{background:var(--accent-2)}.dot.review{background:var(--accent-3)}.dot.done{background:var(--accent)}.col-empty{color:var(--faint);text-align:center;padding:16px 8px;font-size:13px}.card{background:var(--card);border:1px solid var(--line);cursor:pointer;border-radius:14px;flex-direction:column;gap:8px;padding:12px 14px;transition:border-color .15s,box-shadow .15s,opacity .15s;display:flex}.card:hover{border-color:var(--accent-2);box-shadow:0 4px 14px #1a1c2b14}.card.dragging{opacity:.45}.card h3{overflow-wrap:anywhere;font-size:15px;font-weight:600;line-height:1.3}.card.done h3{color:var(--faint)}.card-top{flex-wrap:wrap;align-items:center;gap:6px;min-height:28px;display:flex}.card-meta{color:var(--faint);font-size:13px}.moves{opacity:0;gap:2px;margin-left:auto;transition:opacity .15s;display:flex}.card:hover .moves,.card:focus-within .moves,.card:focus .moves{opacity:1}@media (hover:none){.moves{opacity:1}}.moves button{background:var(--bg);width:28px;height:28px;color:var(--muted);border:0;border-radius:99px;place-items:center;padding:0;display:grid}.moves button:hover{background:var(--accent-soft);color:var(--accent)}.pill{white-space:nowrap;border-radius:99px;padding:2px 10px;font-size:12px;font-weight:700}.pill.pri-H{background:var(--high-soft);color:var(--high)}.pill.pri-M{background:var(--accent-soft);color:var(--accent)}.pill.pri-L{background:var(--col);color:var(--muted)}.pill.warn{background:var(--warn-soft);color:var(--warn)}.bar-row{align-items:center;gap:10px;display:flex}.bar-row .bar{background:var(--bg);border-radius:99px;flex:1;height:6px;overflow:hidden}.bar-row .bar i{background:var(--accent);border-radius:99px;height:100%;display:block}.bar-row>.num{font:700 12px var(--display);color:var(--muted);text-align:right;min-width:36px}.show-more{align-self:center;padding:6px 10px;font-size:13px}.practice{text-align:left;border:1px solid var(--line);background:var(--surface);width:100%;color:var(--fg);border-radius:16px;align-items:center;gap:14px;padding:12px 16px;font-weight:400;display:flex}.practice:hover{border-color:var(--accent)}.mark-lg.sm{border-radius:12px;width:44px;height:44px}.practice-t{flex:1;min-width:0;display:grid}.practice-t b{font:700 16px var(--display)}.practice-t small,.practice-n small{color:var(--faint);font-size:13px}.practice-n{text-align:right;display:grid}.practice-n b{font:700 18px var(--display)}.course-link{text-align:left;color:var(--fg);text-overflow:ellipsis;white-space:nowrap;font-weight:600;overflow:hidden}.tag{font:600 11px var(--mono);letter-spacing:.04em;text-transform:uppercase;border-radius:4px;padding:2px 7px}.tag.new{background:var(--accent-soft);color:var(--accent)}.course-form .grid-2,.log-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.wide{grid-column:1/-1}.bars{grid-template-columns:repeat(12,minmax(0,1fr));align-items:end;gap:6px;height:200px;display:grid}.bar-col{text-align:center;grid-template-rows:16px 1fr 16px;gap:4px;height:100%;display:grid}.bar-col .bar{background:var(--accent);opacity:.55;border-radius:3px 3px 0 0;align-self:end;min-height:2px}.bar-col .bar.current{opacity:1}.bar-value,.bar-label{color:var(--muted);font-size:10.5px}.cat-progress{gap:8px;display:grid}.cat-line{grid-template-columns:minmax(0,220px) 1fr 96px;align-items:center;gap:12px;font-size:14px;display:grid}.cat-line .mono{text-align:right}.meter{background:var(--line);border-radius:4px;height:8px;overflow:hidden}.meter div{background:var(--accent);height:100%}.focus{border-color:var(--accent)}@media (width<=640px){.docs-nav{max-width:none}.ch-top{padding:18px}.practice-t small{display:none}.course-form .grid-2,.log-grid{grid-template-columns:1fr}.cat-line{grid-template-columns:1fr 80px}.cat-line .meter{grid-area:2/1/auto/-1}.bar-col:nth-child(2n) .bar-label{visibility:hidden}}@media (width<=900px){.mobile-only{display:inline-flex}.body,.body.chat-collapsed{grid-template-columns:minmax(0,1fr);padding:12px;position:relative}.body>.chat,.body>.rail,.resizer{display:none}.body.chat-open>.chat{z-index:30;border:0;border-radius:0;display:flex;position:absolute;inset:0}.body.chat-open.chat-collapsed>.rail{display:none}.top-actions{gap:12px}}@media (prefers-reduced-motion:reduce){*{transition:none!important}}.tbtn{width:40px;height:40px;color:var(--muted);background:0 0;border:1px solid #0000;border-radius:99px;place-items:center;padding:0;display:inline-grid}.tbtn:hover{background:var(--accent-soft);color:var(--accent)}.who{color:var(--fg);background:0 0;border:1px solid #0000;border-radius:99px;align-items:center;gap:8px;padding:4px 12px 4px 4px;font-weight:700;display:inline-flex}.who:hover{background:var(--accent-soft);color:var(--accent)}.avatar{background:var(--accent-soft);width:32px;height:32px;color:var(--accent);border:1px solid var(--accent-2);border-radius:99px;flex:none;place-items:center;font-size:12px;font-weight:800;display:grid}.tab.cfgtab{margin-left:auto}.tab.cfgtab svg{flex:none}.settings{gap:18px;max-width:980px;display:grid}.cfg-title{align-items:center;gap:10px;font-size:24px;display:flex}.cfg{grid-template-columns:210px minmax(0,1fr);align-items:start;gap:24px;display:grid}.cfgnav{flex-direction:column;gap:2px;display:flex;position:sticky;top:0}.cfggroup{flex-direction:column;gap:2px;display:flex}.cfgnav .grp{font:600 10.5px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:16px 0 6px;padding-left:10px}.cfggroup:first-child .grp{margin-top:0}.cfgnav .ci{color:var(--muted);text-align:left;background:0 0;border:1px solid #0000;border-radius:10px;align-items:center;gap:9px;padding:8px 10px;font-size:14px;font-weight:500;display:flex}.cfgnav .ci:hover{background:var(--surface);color:var(--fg)}.cfgnav .ci.on{background:var(--accent-soft);color:var(--accent);border-color:var(--accent);font-weight:600}.cfgnav .ci svg{flex:none;width:16px;height:16px}.cfgbody{min-width:0}.cfgcard{background:var(--surface);border:1px solid var(--line);border-radius:16px;max-width:620px;padding:20px}.lang-list{gap:8px;display:grid}.lang-option{border:1px solid var(--line);cursor:pointer;border-radius:12px;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;padding:10px 12px;display:grid}.lang-option:hover{border-color:var(--accent)}.lang-option.on{border-color:var(--accent);background:var(--accent-soft)}.lang-option input{accent-color:var(--accent);width:16px;height:16px}.lang-name{font-weight:600}.lang-icon{color:var(--muted);border:1px solid var(--line);cursor:pointer;border-radius:8px;align-items:center;gap:5px;padding:5px 8px;display:inline-flex;position:relative}.lang-icon:hover,.lang-icon:focus-within{color:var(--accent);border-color:var(--accent)}.lang-code{font:600 12px var(--mono)}.lang-icon select{opacity:0;cursor:pointer;width:100%;position:absolute;inset:0}@media (width<=760px){.cfg{grid-template-columns:1fr;gap:14px}.cfgnav{flex-flow:wrap;gap:6px;position:static}.cfggroup{flex-flow:wrap;gap:6px}.cfgnav .grp,.who span:not(.avatar){display:none}.who{padding-right:4px}.tabbar{flex-wrap:wrap;padding:4px 6px}.cat-chips{scrollbar-width:thin;flex-wrap:nowrap;padding-bottom:4px;overflow-x:auto}.cat-chips .chip{flex:none}.tab{min-height:44px;padding:0 10px}}