*{box-sizing:border-box}body{margin:0;background:#f5f6f7;color:#20252b;font:16px/1.5 system-ui,sans-serif}header{max-width:1120px;margin:auto;padding:28px 24px;display:flex;justify-content:space-between;align-items:center;gap:20px}.brand{font-weight:800;font-size:23px}.brand span{color:#80878d;font-size:17px;font-weight:400}#countdown{font-size:30px;font-weight:850;color:#dc3434}main{max-width:1120px;margin:auto;padding:0 24px}.card{background:white;border:1px solid #e5e8eb;border-radius:14px;padding:26px;margin-bottom:20px}form{display:flex;gap:16px;align-items:end;flex-wrap:wrap}label{display:flex;flex-direction:column;gap:6px;font-size:14px;color:#636b73}select,input,textarea{background:white;border:1px solid #d7dde1;border-radius:7px;padding:11px 13px;color:#20252b;font:inherit;min-height:46px}select{min-width:180px}input{width:120px}button{border:0;border-radius:7px;background:#258a43;color:white;font:600 15px system-ui;padding:14px 22px;cursor:pointer}button:hover{background:#1d7036}button:disabled{opacity:.5;cursor:wait}.secondary{background:#edf4ef;color:#246e39;margin-left:18px}h1{font-size:36px;margin:8px 0 12px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:1.6px;color:#7b858d}.muted{color:#7b858d;font-size:14px}progress{width:100%;height:7px;accent-color:#299246;border:0}.grid{display:grid;grid-template-columns:repeat(9,1fr);gap:10px;margin-top:26px}.stat{border:1px solid #e8ebed;border-radius:9px;padding:12px}.stat strong{display:block;font-size:18px}.stat small{display:block;color:#77818a;margin:8px 0}.stat progress{height:5px}details{margin-top:20px;color:#67717a}summary{cursor:pointer}#pending{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}#pending button{background:#f1f4f2;color:#327045;padding:8px 12px}#body{margin:24px 0;overflow-wrap:anywhere;overflow-x:auto}#body img{max-width:100%;height:auto}table{border-collapse:collapse}td,th{border:1px solid #bdc5cb;padding:7px}pre{white-space:pre-wrap}#files a{display:inline-block;margin:0 16px 18px 0;color:#258a43}.answer{flex:1;min-width:200px}#result{font-weight:650}.good{color:#258a43}.bad,#notice{color:#c53737}footer{text-align:center;color:#939ba2;font-size:12px;padding:20px 0 32px}[hidden]{display:none!important}:focus-visible{outline:3px solid #8acb9b;outline-offset:3px}@media(max-width:850px){.grid{grid-template-columns:repeat(6,1fr)}#countdown{font-size:24px}}@media(max-width:560px){header{align-items:start;flex-direction:column;padding:20px 16px}main{padding:0 12px}.card{padding:18px}.grid{grid-template-columns:repeat(3,1fr)}form label,select{width:100%}form button{width:100%}h1{font-size:30px}.identity label{width:auto}.identity select{min-width:140px}}
nav{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 20px}nav button{background:#e8ece9;color:#405447}nav button.active{background:#258a43;color:white}.subnav button{font-size:13px;padding:11px 15px}h2{font-size:22px;margin:0 0 18px}h3{font-size:18px}.grid{grid-template-columns:repeat(5,1fr)}.flag{font-size:12px;color:#8a949b;display:block;margin-top:8px}.flag.raised{color:#218a42;font-weight:700}.stat small{margin:4px 0}.stat strong{display:flex;justify-content:space-between}.catalog-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px}.assignbox{position:sticky;top:16px;align-self:start}.assignbox form{display:flex;flex-direction:column;align-items:stretch;margin-top:20px}.assignbox input{width:100%}.checklabel{flex-direction:row;align-items:center;color:#303940;gap:12px}.checklabel input{width:18px;min-height:18px;accent-color:#258a43}.taskbody{overflow:auto;overflow-wrap:anywhere;margin:20px 0}.taskbody img{max-width:100%;height:auto}.taskbody a{color:#258a43}.taskbody table{max-width:100%}.pager{display:flex;align-items:center;justify-content:space-between;margin-top:16px}.pager button{margin:0}.sethead{display:flex;justify-content:space-between;gap:20px;align-items:center}#timer{color:#dc3434;font-size:26px;white-space:nowrap}#setNav{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}#setNav button{padding:10px 14px}.answers{display:block}.answers label{margin-bottom:16px}.answers textarea{width:100%}.part-result{font-size:14px;margin-bottom:12px}.files{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:20px}.files a{color:#258a43}.status{font-size:13px;background:#edf4ef;padding:4px 9px;border-radius:5px}.result-table{overflow:auto}th{text-align:left;font-size:13px;color:#717c85}td{font-size:14px}.result-table table{width:100%}.empty{color:#88939b;padding:24px;text-align:center}.student-top{display:flex;align-items:center;justify-content:space-between;gap:15px}.student-top h2{margin:0}.student-top button{padding:9px 14px}.compact{grid-template-columns:repeat(5,1fr)}input[type=date]{width:auto}#studentName{width:220px}#notice:empty{display:none}#finishSet{margin:24px 0 0}#recipientList{max-height:250px;overflow:auto}#recipientList label{padding:5px 0}.catalog-title{display:flex;align-items:center;justify-content:space-between;gap:10px}.catalog-title label{font-size:18px;font-weight:650}.task-card summary{color:#2f7444}.task-card details{margin-top:12px}.assignbox .secondary{margin-left:0}.busy{opacity:.6;pointer-events:none}@media(max-width:850px){.catalog-layout{grid-template-columns:1fr}.assignbox{position:static;grid-row:1}.grid,.compact{grid-template-columns:repeat(4,1fr)}}@media(max-width:560px){.grid,.compact{grid-template-columns:repeat(3,1fr)}.stat{padding:9px}.stat small{font-size:11px}.flag{font-size:11px}.sethead{align-items:start;flex-direction:column;gap:0}.checklabel{width:100%}.checklabel input{width:18px}.pager button{width:auto}nav button{flex:1}.student-top{flex-wrap:wrap}#studentName{width:100%}}

header,main{max-width:1440px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:24px}.workspace-main{min-width:0}.leaderboard{position:sticky;top:20px;align-self:start;padding:22px}.leaderboard h2{margin-top:8px;margin-bottom:0}.leader-row{padding:17px 0;border-bottom:1px solid #e8ebed}.leader-name{display:flex;align-items:center;gap:10px;overflow-wrap:anywhere}.leader-place{color:#87938b;font-size:13px}.leader-scores{display:flex;justify-content:space-between;padding-left:20px;margin-top:7px;font-size:13px;color:#68736d}.ranking-note{font-size:12px}.lesson-row{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid #ecefed;flex-wrap:wrap}.lesson-link{background:transparent;color:#267940;text-align:left;padding:8px 0;flex:1}.lesson-link:hover{background:#f1f7f2}.lesson-row .secondary{margin-left:0;padding:10px 14px}.lesson-body{overflow-wrap:anywhere;overflow-x:auto}.lesson-body img{max-width:100%;height:auto;border-radius:8px}.lesson-body pre{background:#15271e;color:#e2f4e7;padding:20px;border-radius:0 0 8px 8px;white-space:pre;overflow:auto;margin-top:0;font:14px/1.7 ui-monospace,monospace}.lesson-body :not(pre)>code{background:#edf3ee;padding:2px 5px;border-radius:4px}.codebar{background:#e8f0eb;color:#487255;display:flex;align-items:center;justify-content:space-between;padding:9px 16px;border-radius:8px 8px 0 0;font-size:13px}.codebar button{padding:6px 12px}.lesson-body blockquote{border-left:3px solid #299246;margin-left:0;padding-left:18px;color:#68736d}#lessonForm{display:block}#lessonForm>label{margin:18px 0}#lessonTitle{width:100%}#lessonContent{width:100%;font:14px/1.6 ui-monospace,monospace}.lesson-tools{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:12px 0}.lesson-tools .secondary{margin:0}.upload-button{border-radius:7px;background:#edf4ef;color:#246e39;font-weight:600;padding:12px 16px;cursor:pointer}.upload-button input{max-width:220px;font-size:12px;width:auto;margin-top:5px}#lessonPreview{border-top:1px solid #e2e8e4;padding-top:20px;margin-top:20px}@media(max-width:1100px){.workspace{grid-template-columns:minmax(0,1fr) 220px;gap:16px}.catalog-layout{grid-template-columns:1fr}.assignbox{position:static;grid-row:1}}@media(max-width:800px){.workspace{grid-template-columns:1fr}.leaderboard{position:static}.leader-row{display:flex;justify-content:space-between;gap:15px}.leader-scores{gap:20px;margin:0}.lesson-tools button{width:auto}.lesson-row .secondary{width:auto}.upload-button input{max-width:100%}}

/* v5: editable Python examples embedded in theory */
.inline-python-panel{background:#15271e;border-radius:0 0 8px 8px;padding:12px;margin-bottom:18px}
.inline-python-editor{display:block;width:100%;box-sizing:border-box;min-height:90px;resize:vertical;background:#15271e;color:#e2f4e7;border:1px solid #41614d;border-radius:6px;padding:12px;font:14px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;tab-size:4}
.inline-python-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.inline-python-actions button{width:auto}
.lesson-body .inline-python-output,.inline-python-output{background:#0a1811!important;color:#c8f7d3!important;border-radius:6px!important;padding:12px!important;margin:12px 0 0!important;white-space:pre-wrap!important;overflow-wrap:anywhere}

/* v6: lesson text formatting and bounded Python output */
.lesson-color-red{color:#c62828}.lesson-color-blue{color:#1565c0}.lesson-color-green{color:#187a37}.lesson-color-orange{color:#a65b00}.lesson-color-purple{color:#7735a6}.lesson-color-gray{color:#64748b}
.lesson-color-control{display:inline-flex;flex-direction:row;align-items:center;gap:8px;font-size:13px}
.lesson-color-control select{min-width:135px;min-height:40px;padding:7px}
.lesson-body .inline-python-output,.inline-python-output{max-height:25.5em!important;overflow-y:auto!important;overflow-x:auto!important;overscroll-behavior:contain;white-space:pre-wrap!important;overflow-wrap:anywhere!important;line-height:1.7!important;display:block;scrollbar-width:thin}
.lesson-body .inline-python-output[hidden],.inline-python-output[hidden]{display:none!important}