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.note-updated{font-size:10px;color:#6d82ad;margin:0 0 22px;line-height:1.8}.conflict-card{border:1px solid #ead3b0;background:#fffaf1;padding:15px;border-radius:9px;margin:0 0 24px;font-size:11px;line-height:1.8;color:#83613d}.conflict-card summary{font-weight:700;cursor:pointer}.conflict-card small{font-weight:700}.conflict-card p{margin:8px 0 12px}.conflict-card>div{margin-top:15px}.conflict-card .citation{display:inline-block;margin:3px 3px 0 0;font-size:9px;background:#f1eadc;color:#866e4c}.conflict-previous{opacity:.75;border-bottom:1px solid #eadfcf;padding-bottom:14px}

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.study-actions{display:flex;align-items:center;gap:18px;margin:0 0 26px}.study-actions .primary{font-size:11px;padding:10px 16px}.study-actions .text-btn{font-size:10px}#questions-dialog{width:600px}#question-form label{display:block;color:#7f8ba1;font-size:11px;line-height:1.9}#question-form select{display:block;width:100%;font:inherit;font-size:12px;color:var(--ink);background:#fff;border:1px solid #dfe5ef;border-radius:7px;padding:11px 12px;margin-top:7px}#question-form select:focus{outline:2px solid #cdd7fa}#question-form input{font-size:12px}.question-settings{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.question-scope{font-size:14px;line-height:1.8;color:#4f6383;margin:0 0 22px;overflow-wrap:anywhere}.question-caption{font-size:11px;line-height:1.9;color:#93a0b6;margin:18px 0}.question-generating{display:flex;align-items:center;gap:12px;padding:30px 0;font-size:13px;color:#6a7ea6}.question-set-list{display:grid;gap:10px;margin-top:26px}.question-set-list button{display:block;text-align:left;border:1px solid var(--line);padding:17px;border-radius:9px;line-height:1.8}.question-set-list button:hover{background:#f7f9ff;border-color:#bdc9eb}.question-set-list strong{display:block;font-size:12px}.question-set-list span{display:block;font-size:10px;color:var(--muted);margin-top:7px}.generated-question{border-top:1px solid var(--line);padding:24px 0}.generated-question h3{font-size:14px;line-height:1.95;white-space:pre-wrap;overflow-wrap:anywhere;margin:16px 0}.question-number{font-size:11px;font-weight:700;color:#607bbb}.question-number span{font-size:10px;color:#9aa7bb;font-weight:400;margin-left:8px}.question-options{list-style:none;counter-reset:option;padding:0;display:grid;gap:8px}.question-options li{counter-increment:option;border:1px solid #e8ecf4;border-radius:7px;padding:12px;font-size:12px;line-height:1.8;overflow-wrap:anywhere;white-space:pre-wrap}.question-options li:before{content:counter(option);display:inline-block;color:#8b9abd;margin-right:10px}.question-saved{display:flex;align-items:center;gap:7px;color:#7d9d91;font-size:10px;border-top:1px solid var(--line);padding-top:18px}.question-saved .icon{width:14px;height:14px}
#questions-dialog[open]{display:flex;flex-direction:column}#questions-dialog>.dialog-heading{flex:none}#questions-body{overflow:auto;min-height:0}

.solve-navigation{display:flex;align-items:center;justify-content:space-between;margin:15px 0;font-size:10px;color:#9aa6b8}.question-options li:has(.answer-choice){padding:0}.question-options li:has(.answer-choice):before{display:none}.answer-choice{display:flex;align-items:flex-start;gap:12px;padding:13px;cursor:pointer;border-radius:7px}.answer-choice:has(input:checked){background:#eef2ff;color:#405bb9}.answer-choice input{margin:5px 0 0;accent-color:#4563ee;flex:none}.written-answer{width:100%;resize:vertical;padding:13px;border:1px solid #dbe3f1;border-radius:8px;font:12px/1.9 Nanum,sans-serif;color:#405475;outline:0}.written-answer:focus{border-color:#8fa5e7}.attempt-summary{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:16px;background:#f3f6fe;border-radius:8px;font-size:12px;margin:22px 0}.attempt-summary span{font-size:9px;color:#99a5b7}.verdict-tag{border-radius:4px;padding:4px 7px;margin-left:12px!important;font-size:10px!important}.verdict-tag.correct{color:#448b70;background:#eaf7f1}.verdict-tag.incorrect{color:#b66a68;background:#fff0ef}.verdict-tag.partial{color:#a58a45;background:#fff8df}.verdict-tag.pending{color:#8b98aa;background:#eff2f8}.manual-badge{font-size:9px!important;color:#8f9bb2}.submitted-response{background:#f7f9fd;border-radius:8px;padding:16px;margin:20px 0}.submitted-response p,.answer-explanation p{font-size:12px;line-height:1.9;white-space:pre-wrap;overflow-wrap:anywhere;margin:9px 0 20px}.submitted-response small,.answer-explanation small{font-size:10px;color:#8799b5}.submitted-response p:last-child{margin-bottom:0}.answer-explanation{padding:17px 0 0}.answer-explanation p:last-child{margin-bottom:8px}.automatic-verdict{font-size:10px;color:#97a3b7;line-height:1.9}.manual-verdict{display:flex;gap:8px;margin-top:14px}.verdict-button{font-size:10px;color:#8a99b2;border:1px solid #e0e6f0;border-radius:6px;padding:8px 12px}.verdict-button.active{color:#4b66bd;border-color:#a6b7e9;background:#f0f4ff}.question-options li.correct-option{border-color:#9ac9b6;background:#f1faf6}.question-options li.chosen-option small{font-size:9px;color:#8c9bb1;margin-left:10px}.grading-notice{display:flex;gap:8px;align-items:center;font-size:10px;color:#8a9bb5;line-height:1.8}.grading-criteria{font-size:11px;line-height:1.9;color:#8293ae;padding:12px 0}.grading-criteria summary{cursor:pointer}.grading-criteria strong{font-size:10px}.attempt-list{display:grid;gap:10px;margin:20px 0}.attempt-list button{text-align:left;border:1px solid var(--line);border-radius:8px;padding:17px;line-height:1.8}.attempt-list button:hover{background:#f8faff}.attempt-list strong{display:block;font-size:12px}.attempt-list span{display:block;font-size:10px;color:#9ba6b8;margin-top:6px}@media(max-width:760px){.attempt-summary{align-items:flex-start;flex-direction:column;gap:8px}.question-number .verdict-tag{display:inline-block}}
.answer-choice input[type=radio]{display:inline-block;width:16px;height:16px;padding:0;border:0;flex:0 0 16px}.answer-choice span{min-width:0;overflow-wrap:anywhere}

[data-mastery=unassessed]{--mastery:#9aa5b5;--mastery-bg:#f4f6f9;--mastery-border:#dce2ea}[data-mastery=weak]{--mastery:#c55454;--mastery-bg:#fff3f2;--mastery-border:#e5abab}[data-mastery=partial]{--mastery:#b88615;--mastery-bg:#fff9df;--mastery-border:#e7cf84}[data-mastery=mastered]{--mastery:#416bdc;--mastery-bg:#eff4ff;--mastery-border:#a7bff4}.map-node.concept[data-mastery]{border-color:var(--mastery-border);background:var(--mastery-bg)}.map-node.concept[data-mastery] .concept-dot{background:var(--mastery)}.map-conflict{position:absolute;right:5px;top:4px;display:flex;align-items:center;justify-content:center;width:13px;height:13px;border-radius:50%;font:9px Arial;color:#a7752e;background:#fff0c8}.mastery-legend{position:absolute;top:75px;left:19px;display:flex;align-items:center;gap:13px;z-index:1;pointer-events:none;font-size:9px;color:#8f9bb0;background:#f8fafde8;padding:7px 9px;border-radius:6px}.mastery-legend span{display:inline-flex;align-items:center;gap:5px}.mastery-legend i,.mastery-badge i{display:inline-block;width:6px;height:6px;background:var(--mastery);border-radius:50%;flex:none}.concept-progress{display:flex;gap:8px;margin:0 0 21px}.mastery-badge{display:inline-flex;align-items:center;gap:6px;font-size:10px;line-height:1.7;color:var(--mastery);background:var(--mastery-bg);padding:4px 9px;border:1px solid var(--mastery-border);border-radius:5px}.concept-progress+.note-updated{margin-top:-8px}.mastery-badge[data-mastery=unassessed]{color:#8290a6}@media(max-width:760px){.mastery-legend{left:12px;gap:10px;font-size:8px}}

.course-tools{margin-left:auto;display:flex;align-items:center;gap:19px;flex:none}.course-tools .text-btn{font-size:10px}.question-profile-row{display:flex;align-items:flex-end;gap:14px;margin-bottom:22px}.question-profile-row>label{flex:1}.question-profile-row>button{padding-bottom:11px}.question-priority{font-size:10px;color:#96a2b7;line-height:1.9;margin:9px 0 17px}.exam-snapshot-tag{display:inline-block;margin-left:10px;color:#7e91bc}.exam-snapshot-tag:before{content:'·';margin-right:8px}#exam-dialog{width:660px}#exam-dialog[open]{display:flex;flex-direction:column}#exam-dialog>.dialog-heading{flex:none}#exam-body{min-height:0;overflow:auto}.exam-list{display:grid;gap:12px}.exam-card{border:1px solid var(--line);border-radius:10px;padding:19px}.exam-card.selected{background:#f6f8ff;border-color:#afbeeb}.exam-card-heading{display:flex;align-items:center;gap:9px}.exam-card-heading strong{font-size:14px;overflow-wrap:anywhere}.exam-card-heading small{font-size:10px;color:#a1acc0;white-space:nowrap}.exam-selected{margin-left:auto;flex:none;font-size:10px;color:#6480c2}.exam-card p{font-size:11px;color:#96a3b8;line-height:1.8}.exam-card-actions{display:flex;justify-content:flex-end;gap:22px}.exam-card-actions button{font-size:10px}#exam-form label.exam-field{display:block;font-size:11px;color:#8291a7;line-height:1.9}#exam-form fieldset{border:0;padding:0;margin:25px 0}#exam-form legend{font-size:11px;color:#8291a7;margin-bottom:14px}.exam-checks{display:grid;grid-template-columns:1fr 1fr;gap:13px 16px}.exam-check{display:flex;align-items:flex-start;gap:9px;color:#586d8e;font-size:11px;line-height:1.9}.exam-check input[type=checkbox]{display:inline-block;width:15px;height:15px;padding:0;border:0;flex:0 0 15px;margin:3px 0 0;accent-color:#4563ee}.exam-weights{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.exam-weights label{font-size:11px;color:#8291a7}.exam-weights+.question-caption{font-size:10px;margin-bottom:0}#exam-form select{display:block;width:100%;font:inherit;font-size:12px;color:var(--ink);background:#fff;border:1px solid #dfe5ef;border-radius:7px;padding:11px 12px;margin-top:7px}#exam-form select:focus{outline:2px solid #cdd7fa}@media(max-width:760px){.course-tools{gap:10px}.course-tools .text-btn{font-size:9px}.exam-checks{column-gap:10px}.exam-weights{gap:9px}.exam-snapshot-tag{margin-left:5px}}
.question-profile-row>label{min-width:0}.exam-snapshot-tag{max-width:100%;overflow-wrap:anywhere;white-space:normal}.exam-card-heading strong{min-width:0}
:root{--left-width:256px;--right-width:390px}.app-shell{grid-template-columns:var(--left-width) minmax(0,1fr);position:relative}.study-grid{grid-template-columns:minmax(0,1fr) var(--right-width);position:relative}.panel-resizer{position:absolute;top:0;bottom:0;width:7px;cursor:col-resize;z-index:12;touch-action:none}.panel-resizer:hover{background:#7165eb33}.resize-left{left:calc(var(--left-width) - 4px)}.resize-right{right:calc(var(--right-width) - 4px)}body.sidebar-collapsed .resize-left,.study-grid.note-hidden .resize-right{display:none}.course-home{max-width:1160px;margin:40px auto;padding:24px}.course-home-heading{display:flex;justify-content:space-between;align-items:center}.course-home-heading h1{font-size:32px}.course-home-tools{display:flex;justify-content:flex-end;margin:20px 0}.course-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:22px}.course-card{border:1px solid var(--line,#e7e7ed);border-radius:16px;background:white;padding:22px}.course-open{display:block;width:100%;text-align:left;background:none;border:none;cursor:pointer}.course-card-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:#eeecff;color:#6d5be8}.course-card h2{font-size:20px}.course-card p{color:#92909b}.course-card-actions{display:flex;justify-content:space-between;margin-top:24px}.folder-heading{display:flex;align-items:center;gap:3px;margin:12px 0 5px}.folder-toggle,.folder-title{border:0;background:none;cursor:pointer;color:inherit}.folder-title{display:flex;align-items:center;gap:8px;text-align:left;min-width:0;flex:1;font-weight:600}.folder-title span{overflow:hidden;text-overflow:ellipsis}.folder-title svg{width:18px;flex-shrink:0}.folder-files{margin-left:28px;border-left:1px solid #dedce8;padding-left:8px}.folder-menu{padding:3px 7px}.structure-toolbar{position:absolute;top:55px;left:16px;z-index:4;display:flex;align-items:center;gap:8px;background:white;border:1px solid #e4e2ed;padding:8px;border-radius:10px;box-shadow:0 4px 14px #1b184b0b}.structure-toolbar[hidden]{display:none}.structure-toolbar span{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px}.structure-toolbar button{background:#f5f4fc;border:0;border-radius:5px;padding:6px;cursor:pointer}.course-tools{flex-wrap:wrap}.similar-button{border:1px solid #dfdbea;border-radius:6px;color:#6653cb;background:white;padding:6px 10px;font-size:12px;float:right}.manage-options{display:grid;gap:10px}.manage-options button{border:1px solid #e6e3ef;border-radius:8px;background:white;text-align:left;padding:12px;cursor:pointer}#manage-dialog{width:min(640px,90vw)}#manage-body{padding:4px 24px 24px;max-height:75vh;overflow:auto}#manage-body label{display:grid;gap:8px;margin:16px 0}#manage-body input,#manage-body textarea,#manage-body select{width:100%;padding:10px;border:1px solid #ddd9e9;border-radius:8px;font:inherit}#manage-body pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#f6f5fa;padding:14px;border-radius:8px}.source-transcript article,.hint-card{padding:16px 0;border-bottom:1px solid #e5e2ec}.source-transcript p{white-space:pre-wrap;line-height:1.7}.danger-btn{background:#fff2f2;border:1px solid #f4c9c9;color:#c54d4d;border-radius:8px;padding:10px 15px;cursor:pointer}.hint-card blockquote{margin:16px 0;padding:12px 16px;border-left:3px solid #c9c1ee;background:#f8f7fc}.hint-card select{width:100%;margin:12px 0;padding:10px}audio{width:100%}.media-option{display:flex;gap:8px;margin:16px 0;font-size:13px}.audio-glyph{width:20px;color:#886fbb;font-size:23px}.map-panel{position:relative}@media(max-width:760px){.panel-resizer{display:none}.course-home{margin:0;padding:20px}.structure-toolbar{max-width:95%;flex-wrap:wrap}}

@media(max-width:760px){.app-shell{grid-template-columns:minmax(0,1fr)}.study-grid{grid-template-columns:minmax(0,1fr)}.note-panel{position:absolute;inset:0;z-index:8}.course-home{height:100%;overflow:auto}}
.source-item{display:flex;align-items:flex-start;gap:8px;width:100%;padding:9px 5px;text-align:left;border-radius:7px;font-size:11px;line-height:1.6}.source-item>span:last-child{min-width:0;overflow-wrap:anywhere}.source-item small{display:block;font-size:9px;color:var(--muted);margin-top:3px}.source-item .icon{flex:none;width:15px;height:15px;margin-top:2px}.source-item:hover{background:#eef1f8}.source-item.active{background:#eaf0ff;color:#3858c9}.course-home{height:100%;overflow:auto}.answer-revision-actions{display:flex;gap:18px;margin-top:12px}.structure-toolbar{box-shadow:0 4px 14px #1b184b12}.map-node[draggable=true]{cursor:grab}
.note-generating{display:flex;align-items:center;gap:9px;color:#8792a7;font-size:12px;padding:12px 0}.note-generating .spinner{width:14px;height:14px}.note-skeleton{padding:16px 0 28px;display:grid;gap:13px}.note-skeleton i{display:block;height:12px;width:100%;border-radius:5px;background:linear-gradient(90deg,#f0f2f7 25%,#e5e9f2 50%,#f0f2f7 75%);background-size:200% 100%;animation:note-shimmer 1.6s linear infinite}.note-skeleton i:nth-child(3n){width:65%}.note-skeleton i:first-child{width:35%;margin-bottom:12px}.note-generation-error{padding:12px;background:#fff6f5;border-radius:8px;font-size:12px;line-height:1.7}.note-generation-error p{margin:0 0 4px}.note-stale{display:flex;gap:14px;align-items:center;font-size:11px;color:#9d854a;margin:8px 0}.note-open-concept{display:flex;align-items:center;gap:8px;width:100%;padding:14px 0;color:#7584a2;font-size:12px;text-align:left}.note-open-concept .icon{width:14px}@keyframes note-shimmer{to{background-position:-200% 0}}@media(prefers-reduced-motion:reduce){.note-skeleton i{animation:none}}
/* Submitted choices show the selected answer and the answer key explicitly. */
.answer-result .question-options .answer-option{display:grid;grid-template-columns:18px minmax(0,1fr) auto;align-items:start;gap:10px;white-space:normal;padding:14px}
.answer-result .question-options .answer-option:before{display:none}
.answer-option .option-number{font-weight:700;color:#8291ac}
.answer-option .option-text{white-space:pre-wrap;min-width:0}
.answer-option .option-result-badge{display:inline-flex;align-items:center;gap:5px;white-space:nowrap;border-radius:5px;padding:3px 8px;font-size:11px;line-height:1.6;font-weight:700}
.answer-result .question-options .correct-option{background:#ecf8f1;border-color:#75b894;color:#1e6243}
.correct-option .option-result-badge{background:#d3efdf;color:#145c3a}
.answer-result .question-options .incorrect-option{background:#fff0f0;border-color:#e49b9b;color:#a62c36}
.incorrect-option .option-result-badge{background:#fbdadd;color:#a31f2b}
.answer-result .chosen-option .option-number{color:inherit}
@media(max-width:600px){.answer-result .question-options .answer-option{grid-template-columns:18px minmax(0,1fr)}.answer-option .option-result-badge{grid-column:2;justify-self:start}}

#gemini-notice{position:fixed;z-index:30;top:66px;left:50%;transform:translateX(-50%);max-width:calc(100vw - 32px);width:max-content;display:flex;align-items:center;gap:16px;padding:8px 16px;background:#f4f2ff;border:1px solid #dcd6f6;border-radius:12px;box-shadow:0 4px 18px #30234d12;font-size:13px}
#gemini-notice[hidden]{display:none}
#gemini-dialog{max-width:520px;width:calc(100vw - 32px)}
#gemini-dialog input{width:100%;margin-top:8px}
#gemini-dialog p{line-height:1.65}
@media(max-width:700px){#gemini-notice{width:calc(100vw - 32px)}#gemini-dialog .dialog-footer{flex-wrap:wrap}}

/* Temporary shared demo gate. */
.demo-locked .sidebar,.demo-locked .header-meta,.demo-locked #sidebar-toggle,.demo-locked #gemini-notice{display:none!important}
.demo-locked .app-shell{display:block}
.demo-login{max-width:420px;margin:auto}
.demo-login form{display:grid;gap:12px;margin:24px 0}
.demo-login label{display:grid;gap:8px;text-align:left}
.demo-login input{box-sizing:border-box;width:100%;padding:12px;border:1px solid var(--line,#dfe4ee);border-radius:8px;font:inherit}

/* Keep the empty state across the whole course grid, with independent actions. */
.empty-course{grid-column:1/-1;min-width:0;width:100%;max-width:720px;margin:24px auto;padding:clamp(28px,4vw,56px) 24px;border:1px solid var(--line);border-radius:16px;background:var(--white);text-align:center}
.empty-course h2{margin:0;font-size:22px;line-height:1.5;letter-spacing:-.5px;overflow-wrap:anywhere}
.empty-course p{max-width:42ch;margin:12px auto 0;color:var(--muted);font-size:14px;line-height:1.8;word-break:keep-all;overflow-wrap:anywhere}
.empty-course-actions{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:12px;margin-top:28px}
.empty-course-actions button{min-height:44px;max-width:100%;padding:12px 18px;font-size:13px;line-height:1.5;white-space:normal}
.empty-course-actions .text-btn{border:1px solid var(--line);border-radius:8px}
@media(max-width:560px){.empty-course{margin:12px auto;padding:32px 20px}.empty-course h2{font-size:20px}.empty-course-actions{display:grid;grid-template-columns:minmax(0,1fr);max-width:320px;margin:24px auto 0}}

.course-home-tools{gap:12px;flex-wrap:wrap}