:root{--blue:#4366e8;--blue-dark:#294dce;--blue-light:#edf1ff;--ink:#222d43;--muted:#7d879b;--line:#e9edf4;--surface:#fff;--bg:#f7f8fc;--green:#27846a;--green-light:#eaf6f0;--orange:#ad7539;--radius:16px;--sidebar:238px;font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none;color:var(--ink);background:var(--bg);font-size:14px;line-height:1.65}
*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{border:0;background:none;color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible{outline:3px solid #9db0ff;outline-offset:4px}input:focus,textarea:focus,select:focus{outline:2px solid #9db0ff;outline-offset:2px}button:disabled{cursor:not-allowed;opacity:.45}h1,h2,h3,p{margin:0}h1{font-size:30px;letter-spacing:-.9px;font-weight:650;line-height:1.45}h2{font-size:18px;font-weight:650;letter-spacing:-.3px}h3{font-size:15px;font-weight:600}svg.icon{width:21px;height:21px;display:inline-block;vertical-align:middle;flex:none;fill:currentColor}.small .icon{width:17px;height:17px}.muted{color:var(--muted)}.blue-text{color:var(--blue)}.eyebrow{font-size:12px;letter-spacing:1.5px;font-weight:600;color:var(--muted)}.row{display:flex;align-items:center;gap:12px}.between{justify-content:space-between}.wrap{flex-wrap:wrap}.gap8{gap:8px}.spacer{flex:1}.mt8{margin-top:8px}.mt16{margin-top:16px}.mt24{margin-top:24px}.mt32{margin-top:32px}.small{font-size:12px}.hidden{display:none!important}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;min-height:42px;border-radius:10px;font-weight:500;transition:background .18s,transform .18s;white-space:nowrap}.btn:hover{background:#e9edf6}.btn.primary{background:var(--blue);color:#fff;box-shadow:0 3px 6px #4366e817}.btn.primary:hover{background:var(--blue-dark);transform:translateY(-1px)}.btn.secondary{border:1px solid #dfe5f0;background:#fff}.btn.ghost{color:var(--blue);padding:7px 0;min-height:36px}.btn.ghost:hover{background:transparent;color:var(--blue-dark)}.btn.compact{padding:7px 12px;min-height:34px;font-size:12px}.icon-btn{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:9px;color:#748198;flex:none}.icon-btn:hover{background:#edf1f8;color:var(--blue)}.tag{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;background:#f2f4f8;border-radius:5px;color:#7c879c;font-size:11px;white-space:nowrap}.tag.blue{background:var(--blue-light);color:#4b69d5}.tag.green{background:var(--green-light);color:var(--green)}.tag.amber{background:#fbf2e6;color:var(--orange)}.dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:currentColor}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.panel-pad{padding:24px}.section-title{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:0 0 18px}.section-title small{font-size:12px;font-weight:400;margin-left:12px;color:var(--muted)}.progress{height:5px;background:#edf0f7;border-radius:20px;overflow:hidden}.progress>span{height:100%;background:var(--blue);display:block;border-radius:20px}.notice{font-size:12px;color:#79859a;padding:12px 16px;border-radius:10px;background:#f1f4fb;line-height:1.8}.icon-block{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--blue-light);color:var(--blue);flex:none}.icon-block.green{background:#edf6f1;color:#4c8b70}.icon-block.amber{background:#faf2e7;color:#b88d58}.icon-block.lavender{background:#f1edfa;color:#8c77b2}
/* Shell */
.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar);background:#fff;border-right:1px solid var(--line);padding:29px 18px 16px;display:flex;flex-direction:column;z-index:30}.brand{display:flex;align-items:center;gap:10px;padding:0 12px 26px}.brand-mark{width:36px;height:36px;background:var(--blue);color:white;border-radius:11px;display:grid;place-items:center;box-shadow:0 4px 8px #4366e81c}.brand-mark .icon{width:25px;height:25px}.brand-name{font-size:18px;font-weight:650;letter-spacing:-.6px}.brand-sub{font-size:9px;color:#a0a8b8;letter-spacing:2.4px;line-height:1.3}.nav{display:flex;flex-direction:column;gap:5px}.nav a{display:flex;align-items:center;gap:12px;color:#7c8799;padding:11px 14px;border-radius:10px;font-weight:500;transition:background .15s,color .15s}.nav a:hover{background:#f6f7fc;color:#4b66d7}.nav a.active{background:var(--blue-light);color:var(--blue)}.nav .count{margin-left:auto;font-size:11px;background:#e5eaff;padding:0 6px;border-radius:5px}.nav-divider{height:1px;background:var(--line);margin:20px 12px}.nav-label{font-size:10px;letter-spacing:1.4px;color:#a5adbd;padding:0 14px 10px}.sidebar-project{display:flex;align-items:center;gap:10px;padding:8px 14px;color:#8b94a6;font-size:12px;border-radius:9px}.sidebar-project:hover{background:#f7f8fc}.project-dot{width:7px;height:7px;border-radius:2px;background:#7292ec}.sidebar-tip{margin-top:auto;padding:16px 13px;background:linear-gradient(145deg,#f4f6ff,#f7f9ff);border:1px solid #ecf0ff;border-radius:12px}.sidebar-tip p{font-size:11px;color:#8d98b1;margin-top:5px;line-height:1.9}.profile{display:flex;align-items:center;gap:10px;margin-top:19px;padding:10px 6px;width:100%;text-align:left}.avatar{width:34px;height:34px;display:inline-grid;place-items:center;border-radius:50%;background:#eaf0fc;color:#6582be;font-size:12px;flex:none}.profile strong{font-size:12px;display:block;font-weight:600}.profile small{display:block;font-size:10px;color:#a0a8b7}.main-shell{margin-left:var(--sidebar);min-height:100vh}.topbar{height:76px;display:flex;justify-content:space-between;align-items:center;padding:0 42px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.8);gap:16px}.breadcrumb{font-size:12px;color:#9ba3b4;display:flex;align-items:center;gap:10px}.breadcrumb strong{font-weight:500;color:#5f6b81}.context-btn{display:flex;align-items:center;gap:8px;color:#6c7890;font-size:12px}.demo-label{font-size:10px;letter-spacing:.5px;color:#939db0;background:#f2f4f8;padding:3px 9px;border-radius:5px}.divider-v{height:18px;width:1px;background:#e7eaf0;margin:0 6px}.bell{position:relative}.bell:after{content:'';position:absolute;width:5px;height:5px;background:#eea17a;border:2px solid #fff;border-radius:50%;right:8px;top:7px}.mobile-menu{display:none}.page{max-width:1450px;margin:auto;padding:35px 42px 46px;animation:page-in .25s ease}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}.page-head p{color:var(--muted);font-size:13px;margin-top:9px}.page-head .date{font-size:12px;color:#909bad;margin-bottom:5px;display:flex;align-items:center;gap:8px}.footer-note{text-align:center;color:#a3acbd;font-size:10px;margin-top:30px;letter-spacing:.3px}
/* Today */
.dashboard-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px}.continue-panel{background:#eef2ff;border:1px solid #e4eaff;padding:25px 28px;position:relative;overflow:hidden;min-height:250px;display:flex;align-items:center;justify-content:space-between;gap:15px}.continue-text{position:relative;z-index:1;max-width:350px}.continue-text h2{font-size:24px;letter-spacing:-.8px;margin:13px 0 8px}.continue-text p{font-size:12px;color:#8290ae;line-height:1.9;max-width:320px}.continue-text .btn{margin-top:24px;padding:10px 17px}.continue-tag{font-size:11px;color:#667fc3;letter-spacing:.7px}.math-visual{width:240px;min-width:170px;align-self:stretch;position:relative;display:flex;align-items:center;justify-content:center}.math-visual svg{width:100%;max-height:230px;overflow:visible}.math-visual .formula-chip{position:absolute;bottom:26px;right:12px;background:#ffffffd9;box-shadow:0 5px 15px #8f9dd615;border:1px solid #fff;border-radius:8px;padding:5px 12px;color:#7389bb;font-family:Georgia,serif;font-size:13px;transform:rotate(-5deg)}.mini-label{position:absolute;top:27px;left:14px;color:#8e9ed0;font-family:Georgia,serif;font-style:italic;font-size:15px}.daily-panel{padding:23px}.daily-heading{font-size:13px;color:#69768d;display:flex;align-items:center;gap:8px}.daily-panel .big-number{font-size:35px;letter-spacing:-1px;font-weight:600;line-height:1.4}.daily-panel .small-number{font-size:14px;color:#a5aec0;margin-left:4px}.daily-panel .progress{margin:13px 0 20px}.daily-task{display:flex;align-items:center;gap:9px;padding:6px 0;font-size:11px;color:#8993a7}.daily-task .icon{width:16px;height:16px}.daily-task.done{color:#719e8c}.daily-task.current{color:#647abd}.start-section{margin-top:30px}.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.entry{padding:20px;text-align:left;display:flex;gap:13px;align-items:center;transition:transform .18s,border-color .18s}.entry:hover{transform:translateY(-3px);border-color:#cdd7fb}.entry h3{font-size:14px;margin-bottom:5px}.entry p{font-size:11px;color:#9aa3b3;white-space:nowrap}.entry .icon-block{width:42px;height:42px}.entry>.icon{margin-left:auto;width:15px;color:#b7c0d1}.split-bottom{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;margin-top:29px}.topic-row{display:flex;align-items:center;padding:19px 23px;gap:15px;width:100%;text-align:left;border-bottom:1px solid #f0f2f7;transition:background .15s}.topic-row:last-child{border-bottom:0}.topic-row:hover{background:#fafbff}.topic-row h3{font-size:13px}.topic-row p{font-size:11px;color:#9aa3b4;margin-top:4px}.topic-row .topic-progress{width:110px;margin-left:auto}.topic-row .topic-progress small{display:block;text-align:right;color:#95a0b7;font-size:10px;margin-bottom:6px}.review-preview{padding:23px;min-height:240px;display:flex;flex-direction:column}.review-preview .review-badge{font-size:10px;color:#a18b68;background:#f9f3e9;padding:3px 8px;border-radius:5px}.review-preview h3{margin-top:21px;font-size:15px;line-height:1.8}.review-preview p{font-size:11px;line-height:1.9;color:#9aa4b6;margin:8px 0 20px}.review-preview .btn{margin-top:auto;justify-content:flex-start;font-size:12px}.topic-section .section-title,.review-section .section-title{margin-bottom:16px}.section-title .btn{font-size:11px}.quick-stats{display:flex;gap:38px;padding:18px 24px;border-top:1px solid var(--line);font-size:11px;color:#9aa3b5}.quick-stats strong{color:#72819b;font-weight:500;margin-left:8px}
/* Chat */
.chat-layout{display:grid;grid-template-columns:205px minmax(0,1fr);height:calc(100vh - 76px);min-height:550px}.chat-history{border-right:1px solid var(--line);padding:22px 16px;background:#fbfcfe;display:flex;flex-direction:column;gap:8px}.chat-history .btn{width:100%;font-size:12px}.chat-history-label{font-size:10px;color:#a0aabd;padding:22px 10px 7px}.chat-history-item{padding:11px 10px;border-radius:8px;display:flex;align-items:center;gap:8px;font-size:11px;color:#8390a7;text-align:left}.chat-history-item.selected{color:var(--blue);background:#eef2ff}.chat-history-item .icon{width:15px;height:15px}.chat-history .history-bottom{margin-top:auto;font-size:10px;line-height:1.9;color:#a4adbc;padding:12px 10px}.chat-main{min-width:0;position:relative;display:flex;flex-direction:column;background:white}.chat-toolbar{display:flex;align-items:center;gap:12px;padding:17px 26px;border-bottom:1px solid #f2f4f8}.chat-toolbar h3{font-size:12px}.chat-toolbar .tag{font-size:10px}.chat-scroll{flex:1;overflow:auto;padding:26px 30px}.chat-welcome{max-width:650px;margin:38px auto 26px}.welcome-symbol{width:53px;height:53px;background:#edf2ff;color:var(--blue);border:1px solid #e5eaff;display:grid;place-items:center;border-radius:18px;margin-bottom:22px;transform:rotate(-5deg)}.welcome-symbol .icon{width:28px;height:28px;transform:rotate(5deg)}.chat-welcome h1{font-size:28px}.chat-welcome>p{font-size:13px;color:#909bb0;margin-top:11px}.prompt-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:32px}.prompt-card{border:1px solid var(--line);border-radius:12px;padding:17px;text-align:left;display:flex;align-items:center;gap:13px}.prompt-card:hover{background:#f9faff;border-color:#d7dff8}.prompt-card h3{font-size:12px}.prompt-card p{font-size:10px;color:#9ea7b9;margin-top:3px}.prompt-card .icon{color:#7e93cf;width:21px}.chat-hint{padding-top:23px;display:flex;align-items:center;gap:7px;color:#a1aabe;font-size:10px}.composer-wrap{padding:12px 28px 16px;background:#fff}.composer{border:1px solid #e0e5f0;border-radius:15px;padding:12px 15px;box-shadow:0 5px 18px #263f6f05;max-width:850px;margin:auto;transition:border-color .2s}.composer:focus-within{border-color:#a9baf6}.composer textarea{width:100%;resize:none;border:0;outline:none!important;padding:3px 2px 13px;min-height:62px;max-height:150px;font-size:12px;color:#44516c;line-height:1.9;background:transparent}.composer textarea::placeholder{color:#a8b0bf}.composer-tools{display:flex;gap:5px;align-items:center}.tool-chip{display:flex;align-items:center;gap:5px;font-size:10px;color:#95a0b4;padding:5px 8px;border-radius:6px}.tool-chip:hover,.tool-chip.on{background:#eef2ff;color:var(--blue)}.tool-chip .icon{width:15px;height:15px}.send-btn{width:32px;height:32px;display:grid;place-items:center;background:var(--blue);border-radius:9px;color:white;margin-left:auto}.send-btn:hover{background:var(--blue-dark)}.send-btn .icon{width:17px;height:17px}.composer-note{text-align:center;font-size:9px;color:#a9b0bd;margin-top:9px}.messages{max-width:790px;margin:auto}.message{display:flex;gap:12px;margin:0 0 25px;animation:page-in .22s ease}.message .avatar{width:29px;height:29px;font-size:10px;margin-top:2px}.message .avatar.ai{border-radius:9px;background:#edf1ff;color:var(--blue)}.message-body{min-width:0;flex:1}.message-meta{display:flex;gap:9px;align-items:center;font-size:11px;margin-bottom:8px}.message-meta small{font-size:9px;color:#a0aabd}.message-content{font-size:13px;line-height:2;color:#59667c}.message.user .message-content{background:#f2f5fc;padding:12px 16px;border-radius:0 12px 12px 12px;display:inline-block}.message-content h3{font-size:14px;color:#36496f;margin:15px 0 6px}.message-content ul{padding-left:19px;margin:8px 0}.math-equation{font-family:Georgia,"Times New Roman",serif;letter-spacing:.6px;font-size:20px;color:#455f9e;background:#f5f7fd;text-align:center;border-radius:9px;padding:12px 20px;margin:12px 0}.message-actions{display:flex;gap:7px;margin-top:14px;flex-wrap:wrap}.source-inline{display:inline-flex;align-items:center;gap:6px;background:#f0f4fd;color:#7890bf;font-size:10px;border-radius:6px;padding:4px 8px;margin-top:12px}.message.typing .message-content{color:#a4b0c8}.typing-dots{display:flex;gap:4px;padding:8px}.typing-dots i{height:5px;width:5px;border-radius:50%;background:#aab9e8;animation:pulse 1.3s infinite}.typing-dots i:nth-child(2){animation-delay:.15s}.typing-dots i:nth-child(3){animation-delay:.3s}
/* Knowledge and projects */
.toolbar{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:23px}.tabs{display:flex;gap:24px;border-bottom:1px solid var(--line);margin-bottom:24px}.tab{padding:0 2px 13px;font-size:13px;color:#929cb0;position:relative}.tab.active{color:var(--blue);font-weight:550}.tab.active:after{position:absolute;content:'';bottom:-1px;height:2px;left:0;right:0;background:var(--blue)}.searchbox{display:flex;align-items:center;gap:9px;background:white;border:1px solid var(--line);border-radius:9px;padding:8px 12px;min-width:220px}.searchbox .icon{width:17px;height:17px;color:#a2adbf}.searchbox input{background:transparent;border:0;outline:none;font-size:11px;width:100%;min-width:0}.filters{display:flex;gap:8px;flex-wrap:wrap}.filter{font-size:11px;color:#929db1;background:white;border:1px solid var(--line);border-radius:7px;padding:6px 12px}.filter.active{background:#edf2ff;border-color:#dfe7ff;color:#5f79c8}.resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.resource-card{display:flex;flex-direction:column;padding:23px;transition:transform .15s,border-color .15s;min-height:245px;text-align:left}.resource-card:hover{transform:translateY(-3px);border-color:#cdd8f5}.resource-card .cover-row{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:21px}.resource-card h3{font-size:14px;margin-bottom:7px}.resource-card p{font-size:11px;color:#99a4b6;line-height:1.9;flex:1}.resource-card .resource-footer{display:flex;justify-content:space-between;align-items:center;margin-top:20px;color:#a5aec0;font-size:10px}.resource-card .resource-footer .icon{width:15px;height:15px}.resource-summary{display:flex;align-items:center;gap:10px;margin:0 0 22px;font-size:11px;color:#96a1b5}.resource-summary .icon{width:15px;height:15px}.empty-state{text-align:center;padding:55px 25px;grid-column:1/-1;color:#9ba5b6}.empty-state .icon{width:36px;height:36px;margin-bottom:12px;color:#acb9d4}.empty-state h3{color:#6d7c96;margin-bottom:7px}.project-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.project-card{padding:25px;min-height:260px;display:flex;flex-direction:column;transition:border .18s,transform .18s}.project-card:hover{transform:translateY(-3px);border-color:#cdd8f5}.project-card h2{font-size:17px;margin:20px 0 7px}.project-card p{font-size:11px;color:#9aa4b6;line-height:1.9}.project-card .project-meta{display:flex;justify-content:space-between;font-size:10px;color:#98a5ba;margin:24px 0 8px}.project-card.create{border-style:dashed;align-items:center;justify-content:center;color:#9ba9c3;gap:15px;background:transparent}.project-card.create .icon{width:28px;height:28px}.project-banner{display:flex;justify-content:space-between;align-items:center;padding:25px 30px;background:#eef3ff;border-color:#e2eaff;margin-bottom:25px;gap:20px}.project-banner h2{margin-bottom:7px;font-size:23px}.project-banner p{font-size:12px;color:#92a1bd}.checklist-row{display:flex;gap:14px;align-items:center;padding:21px 25px;border-bottom:1px solid var(--line)}.checklist-row:last-child{border-bottom:0}.checklist-row p{font-size:11px;color:#9ca7b9;margin-top:4px}.checklist-row .icon{color:#a0b2d6}.checklist-row.complete .icon{color:#69a58b}.checklist-row .btn{margin-left:auto}
/* Review and records */
.metric-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding:22px 0;margin-bottom:27px}.metric{padding:0 28px;border-right:1px solid var(--line)}.metric:last-child{border:0}.metric .metric-label{font-size:11px;color:#9ba5b7}.metric .metric-value{font-size:29px;color:#53688e;letter-spacing:-.8px;margin:5px 0 0;line-height:1.5}.metric .metric-value small{font-size:11px;letter-spacing:0;margin-left:5px;color:#9ca9bc}.metric .metric-note{font-size:10px;color:#a6afbf;margin-top:3px}.review-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:22px}.question-panel{padding:30px}.question-panel .question-label{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:#97a4bc}.question-panel h2{margin:25px 0 17px;font-size:19px}.question-panel p{font-size:12px;color:#8e9db4;line-height:1.9}.options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:25px 0}.option{border:1px solid #e4e9f2;border-radius:10px;text-align:left;padding:14px 16px;font-size:13px;color:#8492aa;display:flex;align-items:center;gap:12px;background:#fff}.option span:first-child{font-size:10px;width:22px;height:22px;background:#f3f5fa;border-radius:6px;display:grid;place-items:center}.option:hover{border-color:#adbeed;background:#fbfcff}.option.selected{border-color:#8ca5f0;background:#f0f4ff;color:#5370c5}.option.correct{border-color:#8ac6ab;background:#f0f8f3;color:#498a6b}.question-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:20px;border-top:1px solid var(--line);gap:10px}.feedback{background:#eef7f2;padding:18px;border-radius:10px;margin:18px 0;color:#558a70;font-size:12px;line-height:1.9}.feedback.wrong{background:#fdf5e9;color:#a17c45}.review-side{padding:23px;align-self:start}.review-step{display:flex;align-items:flex-start;gap:11px;padding:17px 0;border-bottom:1px solid var(--line)}.review-step:last-child{border:0}.step-num{width:23px;height:23px;border:1px solid #e1e7f2;border-radius:50%;display:grid;place-items:center;font-size:10px;color:#a0afc7;flex:none}.review-step.active .step-num{color:#fff;background:var(--blue);border-color:var(--blue)}.review-step h3{font-size:12px}.review-step p{font-size:10px;color:#a1aabe;margin-top:4px}.concept-card{padding:28px;text-align:center;margin-top:22px;cursor:pointer}.concept-card .eyebrow{font-size:10px}.concept-card h3{margin:17px 0;font-size:15px}.concept-card p{font-size:11px;line-height:1.9;color:#9aa5b9}.concept-card.revealed{background:#f2f5ff}.record-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:22px}.timeline{padding:10px 26px}.timeline-group-title{font-size:11px;color:#a0aabd;margin:18px 0}.timeline-event{display:flex;gap:15px;padding:14px 0 24px;position:relative}.timeline-event:not(:last-child):after{content:'';position:absolute;top:44px;left:17px;bottom:0;border-left:1px solid #eaf0fa}.timeline-icon{width:36px;height:36px;border-radius:50%;background:#eff3fc;display:grid;place-items:center;color:#90a3cb;flex:none;z-index:1}.timeline-icon .icon{width:17px;height:17px}.timeline-event h3{font-size:12px}.timeline-event p{font-size:11px;color:#9ba6ba;margin-top:5px}.timeline-event time{font-size:10px;color:#abb3c1;white-space:nowrap}.timeline-event .tag{margin-top:10px;font-size:9px}.ability-panel{padding:24px;align-self:start}.ability-item{margin-top:23px}.ability-item .row{font-size:11px;justify-content:space-between;margin-bottom:9px}.ability-item .progress{height:4px}.ability-panel .notice{font-size:10px;margin-top:25px}.parent-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px}.parent-highlight{background:#edf4fc;border:1px solid #e2eaf7;padding:27px 30px;border-radius:var(--radius);margin-bottom:24px;display:flex;gap:20px;align-items:center}.parent-highlight h2{font-size:20px;margin-bottom:7px}.parent-highlight p{font-size:12px;color:#8b9cb8;line-height:1.9}.chart-panel{padding:25px}.chart-panel svg{width:100%;height:215px;margin-top:15px}.legend{display:flex;gap:17px;align-items:center;font-size:10px;color:#95a0b6}.legend span{display:flex;align-items:center;gap:6px}.legend b{width:7px;height:7px;background:var(--blue);border-radius:2px}.legend span:last-child b{background:#c8d5fb}.suggestion{padding:24px}.suggestion h3{font-size:13px}.suggestion p{font-size:11px;line-height:2;color:#96a1b6;margin-top:8px}.suggestion .support{padding:16px 0;border-top:1px solid var(--line);margin-top:17px}.settings-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px}.settings-section{padding:28px}.field{margin:0 0 18px}.field label{display:block;font-size:12px;color:#7d899f;margin-bottom:8px}.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid #e2e7f0;border-radius:8px;background:#fff;color:#5f6f8b;font-size:12px}.field textarea{min-height:85px;resize:vertical}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 17px}.setting-row{display:flex;justify-content:space-between;gap:15px;padding:16px 0;border-bottom:1px solid var(--line);align-items:center}.setting-row h3{font-size:12px}.setting-row p{font-size:10px;color:#a0aabc;margin-top:4px}.switch{width:36px;height:21px;border-radius:20px;background:#dce3ef;padding:3px}.switch:after{content:'';display:block;width:15px;height:15px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #7772;transition:transform .2s}.switch.on{background:var(--blue)}.switch.on:after{transform:translateX(15px)}
/* Modal, drawer */
.overlay{position:fixed;inset:0;background:#1f315b3b;backdrop-filter:blur(4px);z-index:90;display:flex;align-items:center;justify-content:center;padding:24px;animation:fade-in .15s}.modal{background:white;border-radius:18px;padding:28px;width:min(520px,100%);box-shadow:0 25px 90px #20366520;max-height:90vh;overflow:auto;animation:modal-in .22s ease}.modal.wide{width:min(700px,100%)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.modal h2{font-size:20px}.modal-intro{font-size:12px;color:#99a4b8;line-height:1.9;margin-bottom:25px}.modal-footer{display:flex;justify-content:flex-end;gap:9px;margin-top:24px}.modal .resource-preview{background:#f7f9fd;padding:24px;border-radius:12px;color:#75849e;font-size:12px;line-height:2}.modal .resource-preview h3{font-size:16px;color:#50678f;margin:0 0 12px}.upload-zone{display:block;border:1px dashed #becce8;border-radius:12px;padding:35px 20px;text-align:center;background:#fafbff;cursor:pointer}.upload-zone .icon{width:29px;height:29px;color:#8fa5d7}.upload-zone strong{display:block;font-size:13px;font-weight:500;color:#6e83ab;margin-top:12px}.upload-zone p{font-size:10px;color:#a2adc1;margin-top:8px}.upload-items{margin-top:15px;max-height:200px;overflow:auto}.upload-item{display:flex;gap:10px;align-items:center;font-size:11px;color:#8593ab;padding:10px;border-bottom:1px solid var(--line)}.upload-item .icon{color:#81a1da}.radio-choice{display:flex;gap:13px;align-items:flex-start;padding:16px;border:1px solid var(--line);border-radius:10px;margin-top:12px;cursor:pointer}.radio-choice:has(input:checked){border-color:#adc0f4;background:#f6f8ff}.radio-choice input{accent-color:var(--blue);margin-top:5px}.radio-choice h3{font-size:13px}.radio-choice p{font-size:11px;color:#99a5b9;margin-top:5px}.notification-item{display:flex;gap:14px;border-bottom:1px solid var(--line);padding:17px 0}.notification-item p{font-size:12px;color:#8291aa}.notification-item small{color:#a5b0c1;font-size:10px}.drawer{margin-left:auto;background:#fff;height:100%;width:min(450px,100%);padding:30px;overflow:auto;animation:drawer-in .2s ease}.overlay.drawer-overlay{padding:0}.drawer .resource-preview{font-size:12px;color:#7f8da4;line-height:2.1;background:#f7f9fd;padding:22px;border-radius:12px;margin-top:22px}.drawer .resource-preview h3{color:#536d98;margin-bottom:10px;font-size:16px}.drawer .resource-preview h4{margin-bottom:5px;color:#6d80a4}.drawer .source-box{border-top:1px solid var(--line);margin-top:24px;padding-top:20px;font-size:11px;color:#99a5b9;line-height:2.2}.drawer .btn{width:100%;margin-top:22px}.drawer .tag{margin-top:6px}.mobile-shade{display:none}#toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%,15px);opacity:0;background:#334566;color:#fff;border-radius:10px;padding:12px 20px;font-size:12px;box-shadow:0 8px 30px #253d6b1a;z-index:150;pointer-events:none;transition:opacity .2s,transform .2s;max-width:90vw}#toast.visible{opacity:1;transform:translate(-50%,0)}.pill-group{display:flex;gap:7px;flex-wrap:wrap;margin:16px 0}.pill-group span{font-size:10px;background:#f1f4fb;color:#92a3c1;border-radius:6px;padding:5px 9px}.landing-start{display:flex;gap:13px;align-items:center}.back-link{display:flex;align-items:center;gap:7px;font-size:12px;color:#8c9ab2;margin-bottom:20px}.back-link .icon{width:16px;height:16px}
@keyframes page-in{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}@keyframes fade-in{from{opacity:0}to{opacity:1}}@keyframes modal-in{from{opacity:0;transform:translateY(8px) scale(.99)}to{opacity:1;transform:none}}@keyframes drawer-in{from{transform:translateX(40px);opacity:0}to{transform:none;opacity:1}}@keyframes pulse{0%,80%,100%{opacity:.35;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
@media(min-width:1500px){.page{padding-top:42px}.continue-panel{min-height:275px}.continue-text h2{font-size:27px}.entry{padding:24px}.topic-row{padding-top:22px;padding-bottom:22px}}
@media(max-width:1250px){:root{--sidebar:208px}.sidebar{padding-left:13px;padding-right:13px}.brand{padding-left:8px}.brand-name{font-size:16px}.topbar{padding:0 28px}.page{padding:30px 28px}.dashboard-grid,.split-bottom{grid-template-columns:minmax(0,1fr) 265px;gap:17px}.continue-panel{padding:23px}.continue-text h2{font-size:21px}.math-visual{width:180px;min-width:140px}.entry{padding:16px 12px;gap:10px}.entry p{font-size:10px}.entry>.icon{display:none}.resource-grid,.project-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.chat-layout{grid-template-columns:175px minmax(0,1fr)}.chat-scroll{padding:20px}.chat-welcome{margin-top:30px}.parent-grid{grid-template-columns:minmax(0,1fr) 270px}}
@media(max-width:1020px){:root{--sidebar:184px}.brand-name{font-size:14px}.brand-mark{width:31px;height:31px}.brand-sub{font-size:8px}.sidebar{padding-top:25px}.nav a{font-size:12px;padding:10px 12px;gap:10px}.nav a .icon{width:19px;height:19px}.sidebar-tip{padding:12px 10px}.sidebar-tip h3{font-size:11px}.sidebar-tip p{font-size:10px}.topbar{padding:0 22px}.page{padding:28px 22px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 235px}.split-bottom{grid-template-columns:1fr}.review-preview{min-height:unset;display:block}.review-preview h3{margin-top:12px}.review-preview .btn{margin-top:0}.entry-grid{gap:10px}.entry{display:block}.entry .icon-block{margin-bottom:12px;width:35px;height:35px}.daily-panel{padding:20px}.math-visual{width:155px;min-width:110px}.continue-panel{gap:2px}.continue-text h2{font-size:20px}.continue-text p{font-size:11px}.review-grid,.record-layout,.parent-grid,.settings-grid{grid-template-columns:1fr}.review-side{display:none}.ability-panel{display:block}.chat-history{display:none}.chat-layout{grid-template-columns:1fr}.demo-label{display:none}.metric{padding:0 18px}}
@media(max-width:760px){:root{--sidebar:238px}.sidebar{transform:translateX(-100%);transition:transform .2s;padding:25px 18px}.sidebar.open{transform:translateX(0)}.sidebar.open~.mobile-shade{display:block;position:fixed;inset:0;background:#20365e55;z-index:29}.brand-name{font-size:18px}.brand-mark{width:36px;height:36px}.nav a{font-size:14px;padding:12px}.sidebar-tip h3{font-size:13px}.sidebar-tip p{font-size:11px}.main-shell{margin-left:0}.topbar{height:62px;padding:0 18px;gap:8px}.mobile-menu{display:grid}.breadcrumb{display:none}.topbar-left{gap:5px}.context-btn{font-size:11px}.divider-v{display:none}.topbar .row{gap:6px}.topbar .avatar{width:29px;height:29px}.page{padding:25px 18px 35px}h1{font-size:25px}.page-head{margin-bottom:22px;gap:10px}.page-head p{font-size:11px}.page-head .date{font-size:10px}.dashboard-grid{grid-template-columns:1fr}.continue-panel{min-height:240px;padding:22px}.continue-text h2{font-size:22px}.continue-text p{font-size:11px}.math-visual{min-width:95px;width:150px;max-width:38%}.continue-text .btn{margin-top:19px;font-size:12px;padding:9px 13px}.math-visual .formula-chip{font-size:10px;right:-8px;bottom:30px;padding:4px 8px}.mini-label{font-size:11px;left:0;top:50px}.daily-panel{display:none}.entry-grid{grid-template-columns:1fr 1fr 1fr;gap:9px}.entry{padding:14px 11px}.entry h3{font-size:12px}.entry p{font-size:9px;white-space:normal;line-height:1.8}.entry .icon-block{width:33px;height:33px;border-radius:10px}.entry .icon-block .icon{width:18px;height:18px}.section-title small{display:none}.section-title h2{font-size:16px}.start-section{margin-top:25px}.topic-row{padding:17px 16px;gap:11px}.topic-row>.icon{display:none}.topic-row .icon-block{width:35px;height:35px;border-radius:9px}.topic-row h3{font-size:12px}.topic-row p{font-size:10px}.topic-row .topic-progress{width:65px}.quick-stats{gap:20px;padding:15px 16px;font-size:10px}.quick-stats strong{margin-left:4px}.review-preview{padding:20px}.chat-layout{height:calc(100dvh - 62px);min-height:0}.chat-toolbar{padding:13px 18px;gap:7px}.chat-toolbar .tag{font-size:9px}.chat-toolbar .spacer{min-width:5px}.chat-scroll{padding:20px 18px}.chat-welcome{margin:15px 0}.chat-welcome h1{font-size:25px}.chat-welcome>p{font-size:12px}.prompt-grid{gap:10px;margin-top:25px}.prompt-card{padding:13px 10px;gap:9px}.prompt-card h3{font-size:11px}.prompt-card p{font-size:9px}.prompt-card .icon{width:19px}.composer-wrap{padding:9px 12px 11px}.composer{padding:10px 11px}.composer-tools{gap:1px}.tool-chip{font-size:9px;padding:5px}.tool-chip .icon{width:14px}.composer-tools .icon-btn{width:29px;height:29px}.composer-tools .icon-btn .icon{width:17px}.composer textarea{font-size:12px;min-height:55px}.composer-note{font-size:8px}.message{gap:9px}.message-content{font-size:12px}.message .avatar{width:25px;height:25px}.message .btn{font-size:10px;padding:7px 9px}.message-meta{font-size:10px}.math-equation{font-size:17px;padding:10px}.toolbar{align-items:stretch;flex-direction:column}.searchbox{width:100%;min-width:0}.tabs{gap:23px;margin-bottom:20px}.tab{font-size:12px}.resource-grid,.project-grid{grid-template-columns:1fr 1fr;gap:12px}.resource-card{padding:16px;min-height:230px}.resource-card h3{font-size:12px}.resource-card p{font-size:10px}.resource-card .cover-row{margin-bottom:16px}.resource-card .resource-footer{font-size:9px;gap:4px}.resource-card .tag{font-size:9px;padding:2px 5px}.resource-card .icon-block{width:37px;height:37px}.project-card{padding:19px;min-height:240px}.project-card h2{font-size:15px}.project-card p{font-size:10px}.project-card .project-meta{font-size:9px}.page-head>.btn{font-size:11px;padding:8px 11px;min-height:36px}.metric-strip{grid-template-columns:1fr 1fr;gap:22px 0;padding:22px 0}.metric:nth-child(2){border:0}.metric .metric-value{font-size:25px}.metric .metric-label{font-size:10px}.metric .metric-note{font-size:9px}.question-panel{padding:22px}.question-panel h2{font-size:17px;margin-top:20px}.options{grid-template-columns:1fr;gap:10px}.option{padding:12px}.question-bottom .btn{font-size:11px;padding:9px 12px}.timeline{padding:10px 18px}.timeline-event time{font-size:9px}.timeline-event .tag{font-size:9px}.parent-highlight{padding:22px;gap:14px}.parent-highlight h2{font-size:18px}.parent-highlight p{font-size:11px}.chart-panel{padding:20px}.chart-panel svg{height:185px}.settings-section{padding:22px}.form-grid{gap:0 12px}.form-grid .field label{font-size:11px}.modal{padding:23px;border-radius:15px}.overlay{padding:15px}.drawer{padding:25px}.modal h2{font-size:18px}.modal-intro{font-size:11px}.project-banner{padding:22px;align-items:flex-start;flex-direction:column}.project-banner h2{font-size:21px}.checklist-row{padding:17px;gap:10px}.checklist-row h3{font-size:12px}.checklist-row p{font-size:10px}.checklist-row .btn{font-size:10px;padding:8px 9px}.footer-note{font-size:9px}.settings-grid .panel-pad{padding:22px}}
@media(max-width:370px){.math-visual{display:none}.resource-grid,.project-grid{grid-template-columns:1fr}.tool-chip{font-size:8px}.tool-chip .icon{display:none}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.sidebar,.topbar,.btn,.tabs,#toast,.footer-note,.demo-label{display:none!important}.main-shell{margin:0}.page{padding:15px}.parent-grid{grid-template-columns:1fr}.panel{break-inside:avoid}.metric-strip{grid-template-columns:repeat(4,1fr)}}

.sidebar{overflow-y:auto;scrollbar-width:thin}.sidebar>.brand,.sidebar>.nav,.sidebar>.profile{flex-shrink:0}
@media(min-width:761px) and (max-height:850px){.sidebar-tip{display:none}.nav-divider{margin:14px 12px}.brand{padding-bottom:20px}.sidebar-project{padding:6px 14px}.profile{margin-top:auto}}
.chat-main,.chat-scroll{min-height:0}.chat-history{min-height:0;overflow:auto}.chat-scroll{overscroll-behavior:contain}
:root{--muted:#748198}.resource-card p{color:#7e8ba0;font-size:12px}.entry p,.topic-row p{color:#8490a5}.message-content{font-size:14px;color:#536078}.composer textarea{font-size:14px}.chat-welcome>p{color:#7b89a1}.question-panel p{color:#78879f}.daily-task{color:#7c8ba3}.resource-footer,.resource-summary{color:#7e8ba3}.chat-hint{color:#8593ab}
@media(max-width:760px){.composer textarea,.message-content{font-size:13px}.resource-card p{font-size:11px}.entry p{font-size:10px}.chat-welcome>p{font-size:12px}}

@media(max-width:760px){.hero-title-part{display:block}.page-head>.tag{font-size:9px}.page-head>div:first-child{min-width:0}.page-head>div:first-child>p{max-width:210px}}
/* Connected topic release */
.auth-wrap{max-width:1050px;margin:8vh auto;display:grid;grid-template-columns:1.1fr 1fr;gap:64px;padding:32px;align-items:center}.auth-intro h1{font-size:40px;margin:24px 0}.auth-intro p{margin:16px 0}.auth-card{box-shadow:0 16px 60px #1e346d09}.form-grid{display:grid;gap:16px}.form-grid label{display:grid;gap:7px;color:#62708a;font-size:13px}.form-grid input,.form-grid textarea,.form-grid select{width:100%;border:1px solid #dce3ef;border-radius:9px;padding:11px 13px;background:#fff;color:var(--ink)}.error{color:#b84835;white-space:pre-wrap}.learning-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.stats-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.stats-row h2{font-size:29px}.learning-grid .panel{display:flex;flex-direction:column}.learning-grid .panel>div:last-child{margin-top:auto;padding-top:20px}.question-box{max-width:850px;margin:auto}.question-stem{font-size:23px;line-height:1.8;margin:30px 0;white-space:pre-wrap}.question-box fieldset{border:0;padding:0;margin:0}.question-box legend{font-size:12px;color:var(--muted);margin-bottom:12px}.answer-option{display:flex;gap:14px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:15px;margin:10px 0;cursor:pointer}.answer-option:has(input:checked){background:var(--blue-light);border-color:#829bf4}.answer-option input{width:18px;height:18px;accent-color:var(--blue)}.feedback{background:#eef6f2;padding:24px;border-radius:12px}.chat-list{display:grid;gap:16px}.chat-answer{white-space:pre-wrap;overflow-wrap:anywhere}.math-equation{font-family:Georgia,serif;font-size:24px;padding:26px 0;color:#5876c2}hr{border:0;border-top:1px solid var(--line);margin:24px 0}.sidebar .btn{font-size:12px}.continue-panel .math-equation{white-space:nowrap}.notice.error{margin-bottom:16px}textarea{resize:vertical}
@media(max-width:800px){.auth-wrap{grid-template-columns:1fr;gap:24px;margin:0 auto;padding:24px}.auth-intro h1{font-size:30px}.auth-intro .math-equation{display:none}.learning-grid{grid-template-columns:1fr}.continue-panel .math-equation{display:none}.stats-row{gap:8px}.stats-row .panel{padding:16px 10px}.stats-row p{font-size:11px}.stats-row h2{font-size:23px}.question-stem{font-size:19px}.topbar{padding:0 18px}.topbar .tag{font-size:10px}.sidebar.open{transform:translateX(0)}.page-head{align-items:flex-start}.page-head h1{font-size:26px}.question-box{padding:20px}.answer-option{padding:13px 10px}}