:root{font-family:Inter,"Microsoft YaHei",system-ui,sans-serif;color:#20334d;background:#f4f7fb}*{box-sizing:border-box}body{margin:0}header{background:#11233b;color:#fff;padding:25px max(22px,calc((100vw - 1160px)/2));display:flex;align-items:center;justify-content:space-between;gap:20px}header a{color:#a9d1ff;text-decoration:none;font-size:13px}h1{font-size:26px;margin:10px 0 4px}header p{margin:0;color:#a9bdd3;font-size:12px}main{max-width:1160px;margin:26px auto;padding:0 20px}.notice{background:#fff8e9;border:1px solid #efd8a1;border-radius:10px;padding:14px 17px;color:#795d28;font-size:13px;line-height:1.7;margin-bottom:20px}.panel{background:#fff;border:1px solid #e2eaf4;border-radius:13px;padding:22px;box-shadow:0 8px 22px #1d41600d;margin-bottom:18px}h2{font-size:18px;margin:0 0 17px}.auth-panel{max-width:500px;margin:0 auto 18px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.grid .panel{margin:0}form{display:grid;gap:13px}label{display:grid;gap:6px;font-size:12px;font-weight:700;color:#51677e}input,select,textarea{font:inherit;color:#20334d;padding:10px 11px;border:1px solid #d9e4ef;border-radius:8px;background:#fbfdff;width:100%}button{border:0;border-radius:8px;background:#2776d8;color:#fff;padding:10px 15px;font-size:12px;font-weight:750;cursor:pointer}button:hover{background:#145db4}button:disabled{opacity:.55;cursor:wait}details{border-top:1px solid #e4ebf3;margin-top:22px;padding-top:18px}summary{cursor:pointer;color:#286cb9;font-size:13px;font-weight:700}details p,.muted{color:#8291a3;font-size:12px;line-height:1.65}details form{margin-top:15px}.progress{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}.progress span{background:#e9f2ff;color:#2d6fb9;border-radius:99px;padding:8px 13px;font-size:12px;font-weight:700}.heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.heading h2{margin:0}.class-block{border-top:1px solid #e9eef5;padding:17px 0}.class-block h3{margin:0 0 10px;font-size:15px}.activity{border:1px solid #e6edf5;border-radius:9px;padding:13px;margin:8px 0;background:#fafcff}.activity strong{font-size:13px}.activity p{font-size:12px;line-height:1.6;color:#5c7188;margin:7px 0}.activity small{color:#8595a5}.activity button{margin-top:8px}.tag{display:inline-block;margin-right:8px;border-radius:5px;background:#e9f3ff;color:#2b6fb9;padding:3px 7px;font-size:11px}#message{min-height:25px;color:#a44d39;font-size:13px}@media(max-width:700px){header{padding:20px;align-items:flex-start;flex-direction:column}.grid{grid-template-columns:1fr}.progress{gap:5px}.progress span{font-size:10px}}

.workspace-nav{display:flex;align-items:end;justify-content:space-between;gap:15px;margin:0 0 15px}.workspace-nav label{min-width:260px;max-width:420px;flex:1}.workspace-nav select{background:#fff}.workspace-back{background:#e7f0fd;color:#165baf}.workspace-back:hover{background:#d6e6fa}
.learning-hero{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;padding:7px 2px 20px}.learning-hero h2{font-size:27px;margin:5px 0}.learning-hero p{font-size:13px;color:#7186a0;margin:0}.learning-eyebrow,.learning-label{display:block;color:#547aa8;font-size:11px;font-weight:800;letter-spacing:1.2px}.learning-kind{padding:7px 11px;border-radius:8px;background:#e6f0fe;color:#2367b4;font-size:12px;font-weight:700;white-space:nowrap}
.learning-grid{display:grid;grid-template-columns:minmax(270px,360px) minmax(0,1fr);gap:18px;align-items:start}.learning-side .panel h3{font-size:18px;margin:12px 0}.learning-side .panel p{font-size:13px;line-height:1.8}.secondary-button{background:#e9f2ff;color:#1d64b6}.secondary-button:hover{background:#d6e6fb}.understanding-steps{margin-top:13px;padding-top:8px;border-top:1px solid #e7edf5}.understanding-steps div{padding:9px 0}.understanding-steps strong{font-size:12px}.understanding-steps p{margin:5px 0}.history-list{display:grid;gap:7px;margin-top:12px}.history-list div{display:flex;justify-content:space-between;gap:10px;padding:9px 10px;background:#f3f7fc;border-radius:7px;font-size:12px}.history-list span:last-child{color:#6280a0}
.classroom-editor{overflow:hidden;background:#fff;border-radius:13px;border:1px solid #dfe8f3;box-shadow:0 8px 22px #1d41600d}.classroom-editor-head{display:flex;align-items:center;gap:9px;background:#142239;color:#e4efff;padding:13px 18px;font-size:12px}.classroom-editor-head span{color:#f1c337;font-weight:900}.classroom-editor-head small{margin-left:auto;color:#90a8c6}.classroom-editor textarea{display:block;min-height:350px;width:100%;resize:vertical;border:0;border-radius:0;background:#1b2b44;color:#f0f5ff;padding:22px;font:13px/1.75 Consolas,"Cascadia Code",monospace;tab-size:4}.classroom-editor textarea:focus{outline:2px solid #72a8f9;outline-offset:-2px}.classroom-editor-footer{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:13px 18px}.classroom-editor-footer span{font-size:11px;color:#8195ac}.classroom-editor-footer button{white-space:nowrap}
.learning-result{margin-top:18px}.learning-result .heading{align-items:start}.learning-result h2{margin-top:7px}.learning-result>p{font-size:13px;line-height:1.75}.learning-result #activityScore{font-size:12px;color:#2869b5}.case-list{display:grid;gap:8px}.case-list .case{border:1px solid #dce8f4;border-radius:8px;padding:11px 13px;background:#f8fbff;font-size:12px;line-height:1.7}.case-list .case.fail{border-color:#f0d5d0;background:#fff9f8}.case-list .case strong{display:block;margin-bottom:4px}.decision-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:13px}.decision-list div{padding:11px;background:#f1f6fd;border-radius:8px;font-size:12px;line-height:1.65}.decision-list strong{display:block;margin-bottom:4px}.learning-hint{margin-top:14px;padding:14px;background:#eaf3ff;border-left:3px solid #2e7cda;border-radius:7px;font-size:13px;line-height:1.75}.coach-buttons{display:flex;flex-wrap:wrap;gap:7px;margin-top:13px}.coach-buttons button{background:#eef5ff;color:#1e62aa}.coach-buttons button:hover{background:#daeafb}.coach-response{padding:12px;background:#f5f8fd;border-radius:7px;font-size:12px;line-height:1.7}.task-next{margin-top:16px;padding:14px;background:#f1f7ff;border:1px solid #d9e9fc;border-radius:9px}.task-next p{margin:0 0 10px;font-size:12px;color:#4c6888}
@media(max-width:800px){.learning-grid{grid-template-columns:1fr}.learning-hero{flex-direction:column}.classroom-editor textarea{min-height:280px}.decision-list{grid-template-columns:1fr}.workspace-nav{align-items:stretch;flex-direction:column}.workspace-nav label{max-width:none;width:100%}}

.due-date-help{margin:-6px 0 0;padding:9px 12px;background:#fff8e9;border-left:3px solid #d7a640;border-radius:5px;color:#765b22;font-size:12px;line-height:1.6}
.submission-filter{max-width:360px;margin:12px 0}
.submission-entry strong{display:block;line-height:1.65}
.code-location{margin:13px 0;padding:13px;background:#f5f8fc;border:1px solid #d8e4f0;border-radius:9px}
.code-location>strong{display:block;font-size:12px;color:#244969}
.code-location>p{margin:6px 0 11px;font-size:12px;line-height:1.6;color:#526d87}
.code-location-lines{overflow:auto;background:#14253c;border-radius:7px;padding:8px 0;color:#ecf4ff;font:12px/1.65 Consolas,"Cascadia Code",monospace}
.code-location-line{display:flex;min-width:max-content;white-space:pre;padding:1px 12px}
.code-location-line.suspect{background:#795715;color:#fff4d0;border-left:4px solid #ffd15b;padding-left:8px}
.code-location-line.observed-error{box-shadow:inset 4px 0 #f28d83;background:#673843;color:#ffe9e6}
.code-location-line.suspect.observed-error{background:#795715;box-shadow:inset 4px 0 #f28d83}
.code-line-number{display:inline-block;min-width:34px;margin-right:12px;color:#aabbd1;user-select:none;text-align:right}
.code-location-line code{font:inherit;white-space:pre}
.code-location button{margin-top:10px}

.activity-group{margin:15px 0;padding:0 12px 10px;border:1px solid #dce8f4;border-radius:9px;background:#f7faff}
.activity-group>summary{padding:13px 0;color:#245e9d;font-weight:750}
.activity-group .activity{background:#fff}
.withdrawn-group{background:#f8f8fa;border-color:#e1e4e9}
.withdrawn-group>summary{color:#626d79}
.withdrawn-note{color:#996047!important;font-weight:700}
.withdraw-button{margin-left:8px;background:#fff0eb;color:#a54f3f}
.withdraw-button:hover{background:#f8dcd3}
.archive-button{margin-left:8px;background:#eaf2ff;color:#285f9d}
.archive-button:hover{background:#d9e9ff}
.archive-note{color:#526f90!important;font-weight:700}
.quick-result{margin:0 14px 14px;padding:13px 15px;border:1px solid #e4cc7b;border-left:4px solid #c99317;border-radius:8px;background:#fff9e8}
.quick-result.passed{border-color:#b8dfcf;border-left-color:#2c9872;background:#f0fbf5}
.quick-result.quiz{border-color:#cbdced;border-left-color:#357bc0;background:#f2f8ff}
.quick-result>strong{display:block;font-size:14px}
.quick-result>p{margin:5px 0 9px;font-size:12px;line-height:1.55;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
.quick-actions{display:flex;flex-wrap:wrap;gap:8px}
.quick-actions button{padding:7px 11px;background:#e7f0fd;color:#175b9f}
.quick-actions button:hover{background:#d3e6fc}
.learning-result details{margin-top:13px}
.learning-result details>summary{padding:10px 12px;background:#eef5ff;border-radius:7px}

.unit-builder>.heading{margin-bottom:16px}.unit-builder>.heading h2{margin:6px 0}.unit-builder>.heading p{margin:0}
.teacher-tabs{position:sticky;top:0;z-index:5;display:flex;gap:8px;overflow-x:auto;margin:0 0 18px;padding:10px;background:#f4f7fb;border-bottom:1px solid #dce7f3;scroll-margin-top:8px}
.teacher-tabs button{flex:1;min-width:145px;white-space:nowrap;background:#e7f0fd;color:#285f9d}
.teacher-tabs button[aria-selected="true"]{background:#2776d8;color:#fff}
.teacher-tabs button:focus-visible{outline:3px solid #ffc85a;outline-offset:2px}
.teacher-tabs[hidden],.teacher-tab-panel[hidden],#classListPanel[hidden]{display:none!important}
.unit-basics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.unit-basics .unit-objective{grid-column:1/-1}
.unit-draft-items{display:grid;gap:12px;margin:14px 0}.unit-draft-item{padding:15px;border:1px solid #dbe7f3;border-radius:11px;background:#f9fbfe}
.unit-item-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:13px}.unit-item-head>strong{font-size:14px;color:#254d77}
.unit-item-controls{display:flex;gap:6px}.unit-item-controls button{padding:6px 10px;background:#e7f0fd;color:#275f9d}.unit-item-controls .unit-remove{background:#fff0eb;color:#a54f3f}
.unit-item-fields{display:grid;grid-template-columns:150px minmax(180px,1fr) minmax(180px,1fr);gap:12px}.unit-item-fields label:nth-child(4){grid-column:1/3}.unit-item-fields textarea{min-height:78px}
.unit-actions{display:flex;flex-wrap:wrap;gap:9px;margin:15px 0}.unit-preview{margin:15px 0;padding:16px;border:1px solid #cbdff4;border-radius:11px;background:#f4f9ff}.unit-preview>h3{margin:0 0 6px}.unit-preview>p{color:#58728e;font-size:12px}.unit-preview>div{padding:12px 0;border-top:1px solid #dbe8f5}.unit-preview>div p{margin:5px 0;color:#617a93;font-size:12px;line-height:1.6}
.saved-units{margin-top:22px;padding-top:17px;border-top:1px solid #e3ebf3}.saved-units h3{font-size:15px}.saved-unit{padding:12px 0;border-bottom:1px solid #e8eef5}.saved-unit>strong{font-size:13px}.saved-unit>p{margin:6px 0;color:#687e95;font-size:12px}.saved-unit button{margin:4px 7px 0 0}.saved-unit .tag.published{background:#e8f6ef;color:#267257}
.single-activity{margin-top:22px}.single-activity form{margin-top:16px}.unit-tag{display:inline-block;margin-right:8px;padding:3px 7px;border-radius:5px;background:#f0eafe;color:#6650a4;font-size:11px}.unit-tag+strong{display:block;margin-top:8px}
.learning-unit-card{margin:14px 0;padding:15px;border:1px solid #d9d5ef;border-radius:11px;background:#f8f6ff}.learning-unit-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.learning-unit-heading strong{font-size:15px;color:#463878}.learning-unit-heading span{font-size:12px;color:#675a91}.learning-unit-card>p{margin:7px 0 12px;color:#665d85;font-size:12px;line-height:1.6}.learning-unit-card .activity{background:#fff}.learning-unit-card .activity:last-child{margin-bottom:0}
@media(max-width:800px){.unit-basics,.unit-item-fields{grid-template-columns:1fr}.unit-basics .unit-objective,.unit-item-fields label:nth-child(4){grid-column:auto}.unit-item-head{align-items:flex-start}.unit-item-controls{flex-wrap:wrap;justify-content:flex-end}}
@media(max-width:700px){.teacher-tabs button{flex:0 0 auto;min-width:130px}}
.classroom-model-panel details{margin:0;padding:10px 0;border:0}.classroom-model-panel summary{font-weight:700;color:#174c83}.classroom-model-panel p{font-size:12px;line-height:1.7;color:#536987}.classroom-model-panel label{display:block;margin:12px 0;font-size:12px}.classroom-model-panel input,.classroom-model-panel select{display:block;width:100%;margin-top:5px}.classroom-model-panel button{margin:5px 8px 5px 0}#activityModelExplanation{background:#eef9f2;border-left-color:#2f9a63}
.school-quota-panel form{display:grid;grid-template-columns:repeat(2,minmax(0,220px)) auto;align-items:end;gap:12px}.school-quota-panel form button{height:40px}.school-quota-panel>p{margin-bottom:0}
.maji-chat{margin-top:14px;padding:18px}.maji-chat-head{display:flex;justify-content:space-between;align-items:start;gap:18px}.maji-chat-head p{font-size:12px;line-height:1.6;color:#536987;margin:6px 0}.maji-model-select{min-width:175px}.maji-model-select select{margin-top:5px}.maji-chat-messages{display:flex;flex-direction:column;gap:12px;min-height:180px;max-height:min(65vh,650px);overflow:auto;margin:8px 0 14px;padding:16px;background:#f7faff;border:1px solid #e5edf7;border-radius:12px}.maji-chat-message{max-width:92%;padding:12px 14px;border-radius:12px;background:#fff;border:1px solid #dce9f7;overflow-wrap:anywhere;font-size:13px;line-height:1.7}.maji-chat-message.is-user{align-self:flex-end;background:#e9f7ee;border-color:#d2eadb}.maji-chat-message strong{display:block;margin-bottom:4px;font-size:11px;color:#315d89}.maji-chat-body{white-space:pre-wrap}.maji-chat-body pre{white-space:pre;overflow-x:auto;background:#17263a;color:#e7f0ff;padding:12px;border-radius:8px;margin:10px 0;font:12px/1.55 Consolas,monospace}.maji-chat-body code{font:inherit}.maji-chat label{font-size:12px;color:#365b7e}.maji-chat textarea{display:block;width:100%;min-height:75px;margin:7px 0 10px;padding:10px;border:1px solid #cbd9ea;border-radius:8px;resize:vertical}.maji-chat-actions{display:flex;align-items:center;justify-content:space-between;gap:12px}.maji-chat-actions label{display:flex;align-items:center;gap:5px}.maji-chat-actions input{width:auto}.maji-chat-actions button{width:auto}.maji-chat [role=status]{min-height:18px;margin:8px 0 0}@media(max-width:700px){.maji-chat-head{display:block}.maji-model-select{display:block;margin-top:12px}.school-quota-panel form{grid-template-columns:1fr}.maji-chat-messages{min-height:140px;max-height:55vh}.maji-chat-message{max-width:100%}}
.generated-teacher{margin-bottom:18px}.generate-form{display:grid;grid-template-columns:repeat(3,minmax(0,1fr)) auto;align-items:end;gap:12px}.generated-student .generate-form{grid-template-columns:repeat(2,minmax(0,1fr))}.generate-form button{min-height:40px}.practice-key-fields{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.generated-list-item{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px;border-bottom:1px solid #e3ebf3;font-size:13px}.generated-list-item button{flex:none}.generated-actions{display:flex;gap:10px;flex-wrap:wrap}#generatedTeacherEditor{margin-top:20px;padding-top:18px;border-top:1px solid #e3ebf3}#generatedTeacherEditor textarea{font:12px/1.5 Consolas,monospace}#generatedTeacherEditor textarea[name="prompt"]{font:inherit}.generated-student #studentPracticeWorkspace{margin-top:20px;padding-top:18px;border-top:1px solid #e3ebf3}.generated-student #studentPracticePrompt{font-size:14px;line-height:1.7}.generated-student #studentPracticeCode{display:block;width:100%;margin:8px 0 12px;font:13px/1.5 Consolas,monospace;background:#17263a;color:#e7f0ff}.generated-student #studentPracticeExamples p,.generated-student #studentPracticeCases p{font-size:12px;color:#536987}.practice-chat{margin-top:20px}.practice-chat .maji-chat-messages{min-height:100px;max-height:360px}.practice-chat textarea{display:block;margin:8px 0 10px}@media(max-width:800px){.generate-form,.generated-student .generate-form,.practice-key-fields{grid-template-columns:1fr}}
.lesson-planner{margin-bottom:18px}.lesson-planner>.heading h2{margin:4px 0 0}.lesson-plan-start{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.lesson-plan-start label:nth-child(3){grid-column:1/-1}.lesson-plan-actions{display:flex;flex-wrap:wrap;gap:9px;align-items:end}.lesson-plan-start .lesson-plan-actions{grid-column:1/-1}.lesson-plan-list-item{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid #e4ecf4;font-size:13px}.lesson-plan-list-item span{flex:1}.lesson-plan-list-item button{flex:none}.lesson-plan-list-item .secondary-button{background:#eef4fb;color:#345e87}#lessonPlanEditor{margin-top:22px;border-top:1px solid #dfe8f2;padding-top:18px}.lesson-plan-basics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:16px 0}.lesson-plan-basics label:nth-child(3){grid-column:1/-1}.lesson-step-editor{border:1px solid #dbe6f3;border-radius:11px;padding:15px;margin:12px 0;background:#f9fbfe}.lesson-step-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px}.lesson-step-head strong{color:#264c74;font-size:14px}.lesson-step-head button{padding:6px 10px;margin-left:5px;background:#e5effa;color:#245d99}.lesson-step-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.lesson-step-fields label:nth-child(3),.lesson-step-fields label:nth-child(4){grid-column:1/-1}.lesson-step-fields textarea{min-height:65px}.lesson-plan-preview{margin-top:18px;padding:18px;background:#f5f9ff;border:1px solid #cbdff3;border-radius:12px}.lesson-plan-preview h3{margin:0 0 9px;color:#1e4f82}.lesson-plan-preview>p{font-size:13px;line-height:1.7;color:#4b6581}.lesson-flow-step{padding:12px 0;border-top:1px solid #dae6f4}.lesson-flow-step h4{margin:0 0 8px;color:#245d99}.lesson-flow-step p{margin:5px 0;font-size:13px;line-height:1.7}.lesson-flow-step strong{color:#315573}.lesson-flow-task{padding:7px 10px;background:#e5f2ea;border-radius:6px;color:#246349}@media(max-width:750px){.lesson-plan-start,.lesson-plan-basics,.lesson-step-fields{grid-template-columns:1fr}.lesson-plan-start label:nth-child(3),.lesson-plan-basics label:nth-child(3),.lesson-step-fields label:nth-child(3),.lesson-step-fields label:nth-child(4){grid-column:auto}.lesson-plan-list-item{flex-wrap:wrap}.lesson-plan-list-item span{flex-basis:100%}}