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i{color:#d8f074;width:20px;height:20px;font:700 7px var(--font-geist-mono);background:#2b4940;border-radius:6px;place-items:center;font-style:normal;display:grid}.lesson-workspace>aside>button{color:#1b3028;cursor:pointer;background:#d8f074;border:0;border-radius:8px;width:100%;margin-top:12px;padding:10px;font-size:8px;font-weight:800}.lesson-content{border:1px solid var(--line);background:#fff;border-radius:15px;min-height:540px;overflow:hidden}.lesson-content>nav{border-bottom:1px solid var(--line);grid-template-columns:repeat(4,1fr);height:48px;display:grid}.lesson-content>nav button{border:0;border-right:1px solid var(--line);color:#74817c;cursor:pointer;background:#f8f9f6;font-size:8px}.lesson-content>nav button:last-child{border:0}.lesson-content>nav button.active{color:#d8f074;background:#18342e;font-weight:800}.lesson-reading{grid-template-columns:minmax(0,1fr) 220px;min-height:491px;display:grid}.lesson-sections{grid-template-columns:repeat(3,1fr);display:grid}.lesson-sections article{border-right:1px solid var(--line);padding:23px 20px}.lesson-sections article>span{font:500 22px var(--font-geist-mono);color:#b5c1bb}.lesson-sections h3{margin:14px 0 8px;font-size:12px}.lesson-sections p{color:#65746e;font-size:8.5px;line-height:1.65}.lesson-sections ul{margin:15px 0 0;padding-left:16px}.lesson-sections li{color:#74817c;margin:6px 0;font-size:7.5px;line-height:1.55}.lesson-terms{background:#f4f6f1;padding:22px 18px}.lesson-terms>div{border-top:1px solid var(--line);padding:9px 0}.lesson-terms b,.lesson-terms span{display:block}.lesson-terms b{font:600 7.5px var(--font-geist-mono);color:#176b5d}.lesson-terms span{color:#73817b;margin-top:3px;font-size:7.5px}.railway-case,.lesson-quiz,.lesson-sources{min-height:491px;padding:31px}.railway-case h3,.lesson-quiz h3,.lesson-sources h3{margin:0;font-size:20px}.railway-case>p:not(.eyebrow),.lesson-sources>p:not(.eyebrow){color:#687770;max-width:650px;font-size:9px;line-height:1.7}.railway-case>div{grid-template-columns:1fr 1fr;gap:9px;margin-top:25px;display:grid}.railway-case>div span{border:1px solid var(--line);background:#f3f6f0;border-radius:9px;align-items:flex-start;gap:10px;padding:15px;display:flex}.railway-case>div i{font:700 8px var(--font-geist-mono);color:#176b5d;font-style:normal}.railway-case>div b{font-size:8.5px;line-height:1.55}.lesson-quiz>div{grid-template-columns:repeat(3,1fr);gap:10px;margin-top:27px;display:grid}.lesson-quiz>div button{border:1px solid var(--line);min-height:120px;color:var(--ink);text-align:left;cursor:pointer;background:#f8f9f6;border-radius:10px;padding:18px;font-size:9px;line-height:1.5}.lesson-quiz>div button>span{color:#176b5d;background:#e7ece7;border-radius:7px;place-items:center;width:24px;height:24px;margin-bottom:12px;font-weight:800;display:grid}.lesson-quiz>div button.correct{background:#e5f1ec;border-color:#479079}.lesson-quiz>div button.wrong{background:#fff3e5;border-color:#d89b55}.lesson-quiz>p{border-radius:9px;margin-top:16px;padding:15px;font-size:8.5px;line-height:1.6}.lesson-quiz>p b{margin-bottom:4px;display:block}.lesson-quiz>p.correct{color:#24604d;background:#e5f1ec}.lesson-quiz>p.wrong{color:#825516;background:#fff3e5}.lesson-sources>a{border:1px solid var(--line);color:#176b5d;border-radius:9px;justify-content:space-between;align-items:center;margin-top:9px;padding:14px 16px;text-decoration:none;display:flex}.lesson-sources>a b,.lesson-sources>a small{display:block}.lesson-sources>a b{font-size:9px}.lesson-sources>a small{color:#85918c;margin-top:4px;font-size:7px}.lesson-sources>a>span{font-size:8px;font-weight:800}.lesson-sources>em{color:#87938e;margin-top:16px;font-size:7px;font-style:normal;display:block}@media (width<=1200px){.lesson-rail{grid-template-columns:repeat(3,1fr)}.lesson-rail>button:nth-child(3){border-right:0}.lesson-reading{grid-template-columns:1fr}.lesson-terms{grid-template-columns:repeat(3,1fr);gap:0 18px;display:grid}.lesson-terms>.eyebrow{grid-column:1/4}.lesson-terms>div{padding:7px 0}}@media (width<=850px){.precourse-progress{display:block}.precourse-progress>p{text-align:left;margin-top:12px}.lesson-workspace{grid-template-columns:1fr}.lesson-workspace>aside{min-height:0}.lesson-sections{grid-template-columns:1fr}.lesson-sections article{border-right:0;border-bottom:1px solid var(--line)}.lesson-terms{grid-template-columns:repeat(2,1fr)}.lesson-terms>.eyebrow{grid-column:1/3}.railway-case>div,.lesson-quiz>div{grid-template-columns:1fr}.lesson-open{margin-left:auto}}@media (width<=560px){.precourse-progress>div{grid-template-columns:auto 1fr}.precourse-progress .bar{grid-column:1/3;width:100%}.lesson-rail{grid-template-columns:1fr 1fr}.lesson-rail>button:nth-child(odd){border-right:1px solid var(--line)}.lesson-rail>button:nth-child(2n){border-right:0}.lesson-content>nav{overflow:auto}.lesson-content>nav button{min-width:88px}.lesson-terms{grid-template-columns:1fr}.lesson-terms>.eyebrow{grid-column:1}.railway-case,.lesson-quiz,.lesson-sources{padding:22px}}.notes-layout{grid-template-columns:300px minmax(0,1fr);align-items:start;gap:12px;display:grid}.notes-rail{border:1px solid var(--line);background:#fff;border-radius:14px;flex-direction:column;gap:2px;max-height:760px;padding:6px;display:flex;overflow:auto}.rail-tabs{z-index:2;background:#fff;grid-template-columns:1fr 1fr;gap:6px;margin:-6px -6px 2px;padding:6px 6px 8px;display:grid;position:sticky;top:0}.rail-tabs button{border:1px solid var(--line);font:inherit;color:var(--muted);cursor:pointer;background:#fff;border-radius:8px;justify-content:space-between;align-items:center;gap:6px;padding:7px 10px;font-size:11px;font-weight:800;display:flex}.rail-tabs button:hover{border-color:var(--blue)}.rail-tabs button.active{border-color:var(--blue);color:var(--blue2);background:#eaf2f8}.rail-tabs button i{color:inherit;opacity:.75;font-size:10px;font-style:normal;font-weight:600}.notes-rail button{text-align:left;cursor:pointer;width:100%;color:inherit;font:inherit;background:0 0;border:0;border-radius:9px;grid-template-columns:auto 1fr auto;align-items:center;gap:9px;padding:8px 10px;display:grid}.notes-rail button:hover{background:var(--bg)}.notes-rail button.active{box-shadow:inset 0 0 0 1px var(--blue);background:#eaf2f8}.notes-rail button>span{color:var(--blue2);background:#eaf2f8;border-radius:6px;padding:3px 5px;font-size:10px;font-weight:800}.notes-rail button.active>span{background:var(--blue);color:#fff}.notes-rail button div{min-width:0}.notes-rail button small{color:var(--muted);font-size:10.5px;display:block}.notes-rail button b{white-space:nowrap;text-overflow:ellipsis;font-size:12px;font-weight:600;line-height:1.35;display:block;overflow:hidden}.notes-rail em{font-size:11px;font-style:normal}.notes-rail em.done{color:var(--green)}.notes-rail em.todo{color:var(--amber)}.notes-rail em.none{color:#c3ccd5}.notes-rail em.future{color:#c3ccd5;opacity:.45}.note-editor{border:1px solid var(--line);background:#fff;border-radius:15px;min-height:540px;padding:20px 22px}.note-toolbar{border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:16px;padding-bottom:14px;display:flex}.note-toolbar h2{margin:2px 0 4px;font-size:19px;line-height:1.3}.note-toolbar small{color:var(--muted);font-size:12px}.note-toolbar button{border:1px solid var(--line);background:var(--bg);cursor:pointer;color:var(--ink);border-radius:8px;padding:7px 12px;font-size:12px;font-weight:600}.note-toolbar button:hover{border-color:var(--blue);color:var(--blue)}.notes-meta{align-items:center;gap:10px;display:flex}.note-save-state{color:var(--muted);font-size:11.5px}.note-field{margin-bottom:15px}.note-field label{letter-spacing:.05em;color:var(--muted);margin-bottom:6px;font-size:11px;font-weight:800;display:block}.note-field textarea{border:1px solid var(--line);width:100%;font:inherit;resize:vertical;min-height:58px;color:var(--ink);background:#fbfcfd;border-radius:9px;padding:10px 12px;font-size:13px;line-height:1.65}.note-field textarea:focus{border-color:var(--blue);background:#fff;outline:none}.note-raw textarea{color:#5d6d7e;min-height:150px;font-size:12px}.task-empty{color:var(--muted);padding:26px 8px;font-size:13px;line-height:1.7}@media (width<=1120px){.notes-layout{grid-template-columns:260px minmax(0,1fr)}}@media (width<=960px){.notes-layout{grid-template-columns:1fr}.notes-rail{max-height:250px}}.assignment-summary{flex-wrap:wrap;align-items:center;gap:26px;padding:16px 22px}.summary-actions{margin-left:auto}.summary-actions button{color:#fff;cursor:pointer;background:#ffffff1f;border:1px solid #ffffff59;border-radius:8px;padding:8px 14px;font-size:12px;font-weight:600}.summary-actions button:hover{background:#ffffff38}.assignment-form{margin-bottom:14px;padding:14px 18px}.assignment-form-row{grid-template-columns:minmax(0,1fr) 190px 160px auto;gap:9px;margin-top:8px;display:grid}.assignment-form-row input,.assignment-form-row select{border:1px solid var(--line);font:inherit;color:var(--ink);background:#fff;border-radius:8px;padding:8px 11px;font-size:12.5px}.assignment-form-row input:focus,.assignment-form-row select:focus{border-color:var(--blue);outline:none}.assignment-form-row .primary{background:var(--blue);color:#fff;cursor:pointer;white-space:nowrap;border:0;border-radius:8px;padding:8px 16px;font-size:12.5px;font-weight:700}.assignment-form-row .primary:hover{background:var(--blue2)}.assignment-row select{border:1px solid var(--line);font:inherit;color:var(--ink);background:#fff;border-radius:7px;max-width:100%;padding:6px 8px;font-size:11.5px}.assignment-row time.due-urgent{color:var(--amber);font-weight:700}.row-del{border:1px solid var(--line);color:var(--muted);cursor:pointer;background:0 0;border-radius:7px;padding:6px 10px;font-size:11px}.row-del:hover{color:#c0504d;border-color:#c0504d}.exam-points{margin:16px 0 22px}.exam-point-list{gap:10px;padding:4px 20px 18px;display:grid}.exam-point-list article{border:1px solid var(--line);background:#fbfcfd;border-radius:11px;padding:12px 14px}.exam-point-list header{flex-wrap:wrap;justify-content:space-between;gap:10px;margin-bottom:6px;display:flex}.exam-point-list header b{font-size:13px}.exam-point-list header small{color:var(--muted);font-size:11px}.exam-point-list p{white-space:pre-line;margin:0;font-size:12.5px;line-height:1.7}.mastery-state{color:var(--blue2);margin-top:-6px;margin-bottom:8px;font-size:10.5px;font-weight:700}@media (width<=960px){.assignment-form-row{grid-template-columns:1fr 1fr}.assignment-form-row input:first-child{grid-column:1/-1}}.recorder{border:1px solid var(--line);background:#f8fafb;border-radius:12px;margin-bottom:16px;padding:14px 16px}.recorder-bar{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.rec-dot{font-size:14px;line-height:1}.rec-dot.recording{color:#c0504d;animation:1.2s infinite recpulse}.rec-dot.paused{color:var(--amber)}.rec-dot.idle{color:#b9c4cd}@keyframes recpulse{0%,to{opacity:1}50%{opacity:.35}}.rec-time{font-variant-numeric:tabular-nums;letter-spacing:.5px;font-size:17px}.recorder-bar>small{color:var(--muted);font-size:11.5px}.rec-controls{gap:8px;margin-left:auto;display:flex}.rec-controls button{cursor:pointer;border:0;border-radius:8px;padding:8px 15px;font-size:12.5px;font-weight:700}.rec-start{color:#fff;background:#c0504d}.rec-start:hover{background:#a8433f}.rec-pause{background:var(--amber);color:#fff}.rec-stop{color:#fff;background:#40566b}.rec-list{gap:8px;margin-top:12px;display:grid}.rec-list>div{border:1px solid var(--line);background:#fff;border-radius:9px;grid-template-columns:52px minmax(0,1fr) 62px auto auto;align-items:center;gap:10px;padding:8px 12px;display:grid}.rec-list span{color:var(--muted);font-size:11.5px;font-weight:700}.rec-list small{color:var(--muted);text-align:right;font-size:10.5px}.rec-list audio{width:100%;height:32px}.rec-list button{border:1px solid var(--line);cursor:pointer;color:var(--ink);background:0 0;border-radius:7px;padding:5px 10px;font-size:11px}.rec-list button:hover{border-color:var(--blue);color:var(--blue)}.asr-bar{grid-template-columns:minmax(0,1.4fr) minmax(0,1.4fr) 110px auto;gap:8px;margin-top:12px;display:grid}.asr-bar input{border:1px solid var(--line);font:inherit;color:var(--ink);background:#fff;border-radius:8px;padding:8px 11px;font-size:12px}.asr-bar input:focus{border-color:var(--blue);outline:none}.asr-bar .primary{background:var(--blue);color:#fff;cursor:pointer;white-space:nowrap;border:0;border-radius:8px;padding:8px 16px;font-size:12px;font-weight:700}.asr-bar .primary:hover{background:var(--blue2)}.asr-bar .primary:disabled{cursor:not-allowed;background:#a8bccb}.asr-status{color:var(--blue2);margin:8px 0 0;font-size:12px;font-weight:600}.live-toggle{cursor:pointer;font:inherit;align-items:flex-start;gap:8px;margin-top:10px;display:flex}.live-toggle input{width:15px;height:15px;accent-color:var(--blue);cursor:pointer;flex:none;margin-top:1px}.live-toggle span{color:var(--muted);font-size:11.5px;line-height:1.5}.live-toggle:hover span{color:var(--ink)}.pres-panel{margin-bottom:14px}.pres-row{border-bottom:1px solid var(--line);padding:14px 0}.pres-row:last-child{border-bottom:0;padding-bottom:2px}.pres-head{justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px;display:flex}.pres-head b{font-size:13px}.pres-head small{color:var(--muted);margin-top:2px;font-size:11px;display:block}.pres-head time{color:var(--muted);white-space:nowrap;font-size:12px;font-weight:700}.pres-row>input{border:1px solid var(--line);width:100%;font:inherit;color:var(--ink);background:#fff;border-radius:8px;padding:8px 11px;font-size:12px}.pres-row>input:focus{border-color:var(--blue);outline:none}.pres-timeline{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.pres-timeline span{border:1px solid var(--line);color:var(--muted);border-radius:20px;padding:3px 10px;font-size:10.5px}.pres-timeline span.hit{border-color:var(--amber);color:var(--amber);background:#fdf6ea;font-weight:700}.pres-result{grid-template-columns:130px 1fr;gap:8px;margin-top:8px;display:grid}@media (width<=960px){.pres-result{grid-template-columns:1fr}}.rec-hint{color:var(--muted);margin-top:8px;font-size:10.5px;line-height:1.6;display:block}.asr-bar .ghost{border:1px solid var(--line);color:var(--ink);cursor:pointer;white-space:nowrap;background:#fff;border-radius:8px;padding:8px 14px;font-size:12px;font-weight:700}.asr-bar .ghost:hover{border-color:var(--blue);color:var(--blue2)}.asr-bar .ghost:disabled{color:#a8bccb;cursor:not-allowed}.asr-bar.ds-parse{grid-template-columns:auto;justify-content:start;margin-top:8px}.note-ai textarea{background:#f8fafc;min-height:72px;margin-top:10px}@media (width<=960px){.asr-bar{grid-template-columns:1fr 1fr}.asr-bar .primary{grid-column:1/-1}}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}