.upload-box{display:flex;gap:16px;padding:20px;border:1px dashed #b8c9b4;border-radius:12px;background:#f7f9f2}.upload-symbol{font-size:30px;color:var(--green)}.upload-box p{font-size:12px;color:var(--muted);margin:8px 0 15px}.upload-box small{font-size:10px;margin-top:12px}.file-picker{display:inline-flex;position:relative;align-items:center;overflow:hidden;background:var(--green);color:white;border-radius:8px;padding:11px 15px;font-size:12px;cursor:pointer;margin:4px 6px 4px 0}.file-picker input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}.file-picker:focus-within{outline:3px solid #dfb15c;outline-offset:3px}.file-item{display:flex;gap:15px;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:17px 0}.file-info{min-width:0;flex:1}.file-info strong{font-size:13px;overflow-wrap:anywhere}.file-info small{font-size:10px}.file-info audio{width:100%;margin-top:14px;height:40px}.file-item .actions{margin-top:0;flex-shrink:0}.notes-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:22px;align-items:start}.notes-tree{padding:18px;position:sticky;top:20px}.folder-block{margin:10px 0}.folder-button,.subsection-button{border:0;background:none;width:100%;padding:12px 10px;display:block;text-align:left;border-radius:7px;color:var(--ink);overflow-wrap:anywhere}.folder-button{font-weight:700;display:flex;justify-content:space-between;gap:10px}.folder-button.selected{background:#e9f0e3;color:var(--green)}.folder-button span{color:#819277}.subsection-button{padding-left:22px;font-size:12px;color:var(--muted)}.subsection-button.selected{color:var(--green);background:#f3f6ee}.note-editor{min-width:0}#note-body{min-height:370px;line-height:1.9}.note-status{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:10px;color:var(--muted)}hr{border:0;border-top:1px solid var(--line);margin:25px 0}.more-shortcuts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin-bottom:25px}.tool-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;margin:25px 0 18px}.tool-tabs button{display:flex;gap:10px;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);padding:17px 10px;border-radius:10px;color:var(--muted)}.tool-tabs button.active{background:#e7efe1;color:var(--green);border-color:#c4d2b9}.tool-tabs button span{font-size:20px}.calculation{display:block;background:#f0f5eb;border:1px solid #e0e8d9;margin-top:25px;padding:25px;font-size:25px;font-family:Manrope;overflow-wrap:anywhere}.tool-result{margin-top:24px}.tool-result:empty{display:none}#tool-text,#rewritten{min-height:200px;line-height:1.8}.writing-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}.writing-stats>div{padding:18px;background:#f2f6ed;border-radius:8px}.writing-stats strong{font-size:25px}aside{padding-top:25px}.nav-label{margin-top:30px}nav{gap:3px}nav a{padding-top:11px;padding-bottom:11px}.sidebar-note{margin-top:20px}.profile{margin-top:auto}.note-editor .section-head{align-items:flex-start;flex-wrap:wrap}.note-editor .section-head .actions{margin-top:0}.class-row{flex-wrap:wrap}.course{min-width:110px;overflow-wrap:anywhere}#draft-list{overflow-wrap:anywhere}.quiz-option{overflow-wrap:anywhere}@media(max-height:850px) and (min-width:761px){.sidebar-note{display:none}.profile{margin-top:auto}}@media(max-width:1050px){.notes-layout{grid-template-columns:190px minmax(0,1fr)}.file-item{flex-wrap:wrap}.file-info{flex-basis:100%}}@media(max-width:760px){aside{padding:0 4px;padding-bottom:env(safe-area-inset-bottom)}nav{grid-template-columns:repeat(5,minmax(0,1fr))}nav a.mobile-secondary{display:none}nav a{padding:10px 1px}.notes-layout{grid-template-columns:1fr;gap:0}.notes-tree{position:static}.folder-block{margin:5px 0}.more-shortcuts{gap:8px}.more-shortcuts .quick{padding:14px 10px}.more-shortcuts .quick strong{font-size:11px}.tool-tabs{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.tool-tabs button{font-size:12px;padding:14px}.upload-box{padding:15px;gap:10px}.upload-symbol{font-size:24px}.file-item{flex-wrap:wrap}.file-item .actions{width:100%}.notes-tree .section-head{margin-bottom:10px}.writing-stats>div{padding:12px 8px}.writing-stats small{font-size:9px}.note-status{flex-wrap:wrap}.calculation{font-size:21px}.intro{flex-wrap:wrap}}
.name-dialog{border:1px solid var(--line);border-radius:14px;width:min(440px,90vw);padding:28px;color:var(--ink);box-shadow:0 20px 70px #22382f26}.name-dialog::backdrop{background:#20372d66;backdrop-filter:blur(3px)}.name-dialog h2{margin-bottom:25px}
.lesson-studio form{max-width:850px}.error-message{color:#a44e3e;font-size:12px;line-height:1.7}.lesson-contents{display:grid;background:#f0f4e9;padding:20px;border-radius:10px;margin:25px 0;gap:7px}.lesson-contents a{padding:5px;color:var(--green);font-size:13px}.lesson-part{padding-top:25px;scroll-margin-top:24px}.preserve-lines{white-space:pre-wrap}.worked-example{padding:20px;background:#f4f5eb;border-left:3px solid #9aad7d;border-radius:6px;margin:20px 0}.worked-example h3{margin:0}.practice-question{padding:15px 0;border-bottom:1px solid var(--line);margin-bottom:20px}details summary{cursor:pointer;font-size:13px;color:var(--green);padding:12px 0;line-height:1.6}details strong{display:block;margin-top:15px}.slide-preview{display:grid;gap:8px}.slide-preview details{padding:10px 18px;background:#f6f8f1;border-radius:9px}.slide-preview li{line-height:1.8}.lesson-copy h2{line-height:1.6}.lesson-copy h1{line-height:1.5}.lesson-copy{overflow-wrap:anywhere}.lesson-studio input[type=file]{padding:15px;background:#f2f6eb}#generated-lesson>.section-head{flex-wrap:wrap}.lesson-contents a:hover{text-decoration:underline}