.cm-module{border-radius:10px;border:1px solid var(--border);margin-bottom:8px;overflow:hidden;background:var(--panel);}
.cm-module-head{display:flex;align-items:center;gap:10px;padding:10px 12px;cursor:pointer;transition:background .15s;}
.cm-module-head:hover{background:rgba(16,167,170,0.06);}
.cm-module-head.active-mod{background:rgba(16,167,170,0.1);border-left:3px solid var(--ard-teal);}
.cm-mod-icon{font-size:18px;flex-shrink:0;}
.cm-mod-info{flex:1;min-width:0;}
.cm-mod-num{font-size:9px;font-weight:900;color:var(--ard-teal);letter-spacing:.08em;font-family:'JetBrains Mono',monospace;}
.cm-mod-title{font-size:13px;font-weight:800;color:var(--text);}
.cm-mod-prog{font-size:10px;font-weight:700;color:var(--muted);}
.cm-mod-bar{height:3px;background:var(--border);border-radius:3px;margin:4px 0 0;}
.cm-mod-bar-fill{height:3px;border-radius:3px;background:var(--ard-teal);transition:width .4s;}

.cm-tests-btn{width:100%;margin:12px 0 4px;padding:14px 12px;border:0;border-radius:16px;background:linear-gradient(135deg,#2563eb,#0ea5e9);color:white;cursor:pointer;display:flex;align-items:center;gap:10px;text-align:left;box-shadow:0 10px 24px rgba(37,99,235,.28);transition:transform .18s,box-shadow .18s,filter .18s;}
.cm-tests-btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(37,99,235,.36);filter:brightness(1.04);}
.cm-tests-icon{width:38px;height:38px;border-radius:12px;background:rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;}
.cm-tests-btn b{display:block;font-size:14px;font-weight:900;line-height:1.1;}
.cm-tests-btn small{display:block;font-size:10px;font-weight:700;opacity:.78;margin-top:3px;}
.ctest-wrap{max-width:760px;margin:0 auto;}
.ctest-head{background:linear-gradient(135deg,rgba(37,99,235,.10),rgba(14,165,233,.07));border:1px solid var(--border);border-radius:14px;padding:18px;margin-bottom:14px;}
.ctest-title{font-size:20px;font-weight:900;color:var(--text);margin-bottom:5px;}
.ctest-sub{font-size:13px;font-weight:600;color:var(--muted);line-height:1.5;}
.ctest-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:16px;margin-bottom:12px;box-shadow:0 3px 12px rgba(30,50,80,.05);}
.ctest-meta{font-size:10px;font-weight:900;color:#2563eb;font-family:'JetBrains Mono',monospace;letter-spacing:.05em;margin-bottom:7px;}
.ctest-q{font-size:14px;font-weight:900;color:var(--text);line-height:1.45;margin-bottom:10px;}
.ctest-options{display:grid;gap:8px;}
.ctest-opt{border:1.5px solid var(--border);background:var(--panel2);border-radius:10px;padding:10px 12px;text-align:left;cursor:pointer;font-family:'Nunito',sans-serif;font-size:13px;font-weight:800;color:var(--text);transition:all .16s;}
.ctest-opt:hover{border-color:#2563eb;background:rgba(37,99,235,.07);}
.ctest-opt.selected{border-color:#2563eb;background:rgba(37,99,235,.12);color:#1d4ed8;}
.ctest-opt.correct{border-color:#059669;background:rgba(5,150,105,.12);color:#047857;}
.ctest-opt.wrong{border-color:#dc2626;background:rgba(220,38,38,.10);color:#b91c1c;}
.ctest-actions{position:sticky;bottom:0;background:linear-gradient(to top,var(--panel),rgba(255,255,255,.88));border-top:1px solid var(--border);padding:14px 0;margin-top:8px;display:flex;gap:10px;align-items:center;}
.ctest-score{font-size:13px;font-weight:900;color:var(--text);flex:1;}
.ctest-save-status{font-size:12px;font-weight:800;color:#2563eb;background:rgba(37,99,235,.08);border:1px solid rgba(37,99,235,.16);border-radius:10px;padding:10px 12px;margin-top:10px;}
.cm-lessons-list{border-top:1px solid var(--border);}
.cm-lesson-item{display:flex;align-items:center;gap:8px;padding:8px 12px;cursor:pointer;border-bottom:1px solid rgba(30,50,80,0.05);transition:background .12s;}
.cm-lesson-item:hover{background:rgba(16,167,170,0.05);}
.cm-lesson-item.active-lesson{background:rgba(8,145,178,0.08);border-left:2px solid var(--sensor);}
.cm-lesson-item.done-lesson .cm-lesson-num{background:var(--math);color:white;border-color:var(--math);}
.cm-lesson-num{width:22px;height:22px;border-radius:50%;border:1px solid var(--border);background:var(--panel2);display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:800;color:var(--muted);flex-shrink:0;font-family:'JetBrains Mono',monospace;}
.cm-lesson-title{font-size:12px;font-weight:700;color:var(--text);flex:1;}
.cm-lesson-tag{font-size:9px;font-weight:800;padding:2px 6px;border-radius:4px;flex-shrink:0;font-family:'JetBrains Mono',monospace;letter-spacing:.04em;}
.tag-theory{background:rgba(16,167,170,0.12);color:var(--ard-teal);}
.tag-practice{background:rgba(8,145,178,0.12);color:var(--sensor);}
.tag-quiz{background:rgba(217,119,6,0.12);color:#b45309;}
.tag-game{background:rgba(124,58,237,0.12);color:var(--control);}

/* lesson view */
.cv-hero{background:linear-gradient(135deg,rgba(16,167,170,0.08),rgba(8,145,178,0.05));border-radius:10px;padding:20px;margin-bottom:20px;border:1px solid var(--border);}
.cv-lesson-type{font-size:9px;font-weight:900;letter-spacing:.1em;font-family:'JetBrains Mono',monospace;margin-bottom:6px;}
.cv-lesson-title{font-size:18px;font-weight:900;color:var(--text);margin-bottom:6px;}
.cv-lesson-intro{font-size:14px;font-weight:600;color:var(--muted);line-height:1.7;}
.cv-section{margin-bottom:24px;}
.cv-section-title{font-size:13px;font-weight:900;color:var(--text);letter-spacing:.05em;text-transform:uppercase;font-family:'JetBrains Mono',monospace;margin-bottom:12px;padding-bottom:6px;border-bottom:2px solid var(--border);}
.cv-theory-block{background:var(--panel2);border-radius:8px;padding:14px 16px;margin-bottom:10px;border-left:3px solid var(--ard-teal);}
.cv-theory-block h4{font-size:13px;font-weight:800;color:var(--text);margin-bottom:6px;}
.cv-theory-block p{font-size:13px;font-weight:600;color:var(--muted);line-height:1.7;}
.cv-theory-block ul{margin:8px 0 0 16px;}
.cv-theory-block ul li{font-size:13px;font-weight:600;color:var(--muted);line-height:1.8;}
.cv-key-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin-bottom:16px;}
.cv-key-card{background:var(--panel2);border:1px solid var(--border);border-radius:10px;padding:14px;text-align:center;}
.cv-key-card .ck-icon{font-size:24px;margin-bottom:8px;}
.cv-key-card .ck-title{font-size:13px;font-weight:800;color:var(--text);margin-bottom:4px;}
.cv-key-card .ck-body{font-size:11px;font-weight:600;color:var(--muted);line-height:1.5;}
.cv-fun-fact{background:linear-gradient(135deg,rgba(251,191,36,0.1),rgba(245,124,0,0.08));border:1px solid rgba(251,191,36,0.3);border-radius:8px;padding:12px 16px;margin-bottom:12px;}
.cv-fun-fact .ff-label{font-size:9px;font-weight:900;color:#b45309;letter-spacing:.1em;font-family:'JetBrains Mono',monospace;margin-bottom:4px;}
.cv-fun-fact p{font-size:13px;font-weight:600;color:var(--text);line-height:1.6;}
.cv-step-list{counter-reset:steps;}
.cv-step{display:flex;gap:12px;margin-bottom:10px;align-items:flex-start;}
.cv-step-num{width:28px;height:28px;border-radius:50%;background:var(--ard-teal);color:white;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900;flex-shrink:0;font-family:'JetBrains Mono',monospace;}
.cv-step-body{background:var(--panel2);border-radius:8px;padding:10px 14px;flex:1;}
.cv-step-body strong{font-size:13px;font-weight:800;color:var(--text);display:block;margin-bottom:3px;}
.cv-step-body span{font-size:12px;font-weight:600;color:var(--muted);}
.cv-quiz{background:var(--panel2);border:1px solid var(--border);border-radius:10px;padding:16px;}
.cv-quiz-q{font-size:15px;font-weight:800;color:var(--text);margin-bottom:14px;}
.cv-quiz-opts{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
.cv-quiz-opt{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:10px 14px;font-size:13px;font-weight:700;cursor:pointer;color:var(--text);text-align:left;font-family:'Nunito',sans-serif;transition:all .15s;}
.cv-quiz-opt:hover:not(:disabled){border-color:var(--ard-teal);background:rgba(16,167,170,0.06);}
.cv-quiz-opt.q-correct{background:rgba(5,150,105,0.1);border-color:var(--math);color:#047857;}
.cv-quiz-opt.q-wrong{background:rgba(239,68,68,0.08);border-color:#EF4444;color:#b91c1c;}
.cv-quiz-fb{margin-top:10px;padding:10px 14px;border-radius:8px;font-size:13px;font-weight:700;display:none;}
.cv-quiz-fb.show-ok{display:block;background:rgba(5,150,105,0.1);color:#047857;}
.cv-quiz-fb.show-bad{display:block;background:rgba(239,68,68,0.08);color:#b91c1c;}
.cv-nav{display:flex;gap:10px;margin-top:24px;padding-top:16px;border-top:1px solid var(--border);}
.cv-btn{font-family:'Nunito',sans-serif;font-size:13px;font-weight:800;padding:8px 20px;border-radius:8px;cursor:pointer;border:1px solid var(--border);box-shadow:var(--shadow);}
.cv-btn.primary{background:var(--ard-teal);color:white;border-color:var(--ard-teal);}
.cv-btn.primary:hover{background:#007a80;}
.cv-btn.secondary{background:var(--panel2);color:var(--text);}
.cv-btn.sim{background:linear-gradient(135deg,var(--control),var(--sensor));color:white;border:none;}