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#e4e1d9}.sidebar-sub-btn{display:block;width:100%;text-align:left;border:none;background:none;cursor:pointer;padding:6px 10px;font-size:12.5px;border-radius:8px;color:#7a807a;font-weight:500}.sidebar-sub-btn.active{color:var(--accent);font-weight:600;background:var(--accent-soft)}.sidebar-footer{padding:6px 12px 4px}.sidebar-user{padding:12px;border-top:1px solid #e4e1d9;display:flex;align-items:center;gap:10px}.sidebar-user-avatar{width:30px;height:30px;border-radius:50%;background:#dcd8cf;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;color:#5a615b;flex:none}.sidebar-user-name{font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-user-role{font-size:11px;color:#9aa09a}.topbar{flex:none;height:58px;display:flex;align-items:center;gap:10px;padding:0 16px;border-bottom:1px solid #e6e3db;background:#f8f6f1}.topbar.is-mobile{background:#f3f1ec}.topbar-mobile-mark{width:26px;height:26px;border-radius:7px;background:var(--accent);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:13px;flex:none}.topbar-back{border:none;background:none;cursor:pointer;color:#5a615b;display:flex;align-items:center;gap:5px;font-size:13.5px;padding:6px 8px;border-radius:8px;flex:none}.topbar-title{flex:1;min-width:0;display:flex;align-items:center;gap:9px}.topbar-title-text{font-weight:600;font-size:14.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-title-text.muted{color:#9aa09a}.mobile-bottom-nav{flex:none;background:#f3f1ec;border-top:1px solid #e4e1d9;display:flex;padding:6px 4px calc(6px + env(safe-area-inset-bottom))}.mobile-nav-btn{flex:1;border:none;background:none;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 2px;color:#9aa09a;font-weight:500}.mobile-nav-btn.active{color:var(--accent);font-weight:600}.mobile-nav-btn span{font-size:10px}.page-eyebrow{font-size:13px;color:var(--accent);font-weight:600;margin-bottom:6px}.page-heading{font-weight:600;font-size:30px;letter-spacing:-.5px;margin:0 0 8px;line-height:1.15}.page-sub{margin:0;color:#6b736e;font-size:15px}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0 30px}@media (max-width: 600px){.stat-grid{grid-template-columns:1fr}}.stat-card{background:#fff;border:1px solid #eceae4;border-radius:16px;padding:18px 20px}.stat-value{font-weight:600;font-size:30px;line-height:1}.stat-label{color:#8a908a;font-size:13px;margin-top:6px}.section-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:14px}.section-title{font-weight:600;font-size:18px;margin:0}.section-link{border:none;background:none;color:var(--accent);font-size:13px;font-weight:600;cursor:pointer}.list-col{display:flex;flex-direction:column;gap:8px}.recent-chat-item{text-align:left;cursor:pointer;background:#fff;border:1px solid #eceae4;border-radius:14px;padding:13px 16px;display:flex;align-items:center;gap:13px;width:100%}.recent-chat-item:hover{background:#fbfaf7}.recent-chat-icon{width:30px;height:30px;flex:none;border-radius:9px;display:flex;align-items:center;justify-content:center}.recent-chat-body{flex:1;min-width:0}.recent-chat-title{font-weight:600;font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-chat-meta{font-size:12px;color:#9aa09a;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-chat-time{font-size:11.5px;color:#adb2ac;flex:none}.page-header-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px}.btn-primary{border:none;background:var(--accent);color:#fff;border-radius:10px;padding:9px 15px;font-size:13.5px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:6px}.btn-primary:disabled{background:#cfd3ce;cursor:not-allowed}.btn-secondary{border:1px solid #e2dfd6;background:#fff;color:#5a615b;border-radius:10px;padding:10px 18px;font-size:13.5px;font-weight:600;cursor:pointer}.toolbar-row{display:flex;align-items:center;gap:8px;margin-bottom:22px;flex-wrap:wrap}.toolbar-label{font-size:12.5px;color:#9aa09a}.segmented{display:flex;background:#efece6;border:1px solid #e4e1d9;border-radius:10px;padding:2px;gap:2px}.segmented-btn{border:none;cursor:pointer;padding:6px 11px;border-radius:8px;font-size:12.5px;font-weight:500;background:transparent;color:#7a807a;white-space:nowrap}.segmented-btn.active{font-weight:600;background:#fff;color:var(--accent);box-shadow:0 1px 2px #0000000d}.sem-group-header{display:flex;align-items:center;gap:9px;margin-bottom:12px}.sem-group-label{font-size:12px;font-weight:600;letter-spacing:.04em;color:#9aa09a}.sem-group-rule{flex:1;height:1px;background:#e6e3db}.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}.lesson-card{text-align:left;cursor:pointer;background:#fff;border:1px solid #eceae4;border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:12px;transition:box-shadow .15s,transform .15s;box-shadow:0 1px 2px #1f242108}.lesson-card:hover{box-shadow:0 8px 26px #1f242117;transform:translateY(-2px)}.lesson-card-head{display:flex;align-items:center;gap:11px}.lesson-card-avatar{width:38px;height:38px;flex:none;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}.lesson-card-title{font-weight:600;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lesson-card-sub{font-size:12px;color:#9aa09a}.lesson-card-desc{margin:0;font-size:13px;color:#7a807a;line-height:1.45;height:37px;overflow:hidden}.lesson-card-footer{display:flex;align-items:center;gap:12px;font-size:12px;color:#8a908a;border-top:1px solid #f0eee8;padding-top:11px}.lesson-card-footer .processing-label{color:#b5843a;display:flex;align-items:center;gap:4px}.eyebrow-label{font-size:11px;font-weight:600;letter-spacing:.06em;color:#9aa09a;margin-bottom:10px}.top-chat-banner{text-align:left;cursor:pointer;width:100%;background:var(--accent);color:#fff;border:none;border-radius:16px;padding:17px 18px;display:flex;align-items:center;gap:14px;margin-bottom:26px}.top-chat-icon{width:40px;height:40px;flex:none;border-radius:11px;background:#ffffff2e;display:flex;align-items:center;justify-content:center}.top-chat-body{flex:1;min-width:0}.top-chat-lesson{font-size:11.5px;opacity:.85;margin-bottom:2px}.top-chat-title{font-weight:600;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.top-chat-preview{font-size:12px;opacity:.8;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.top-chat-time{font-size:11.5px;opacity:.85;flex:none}.chat-group-card{background:#fff;border:1px solid #eceae4;border-radius:14px;overflow:hidden}.chat-group-header{width:100%;text-align:left;cursor:pointer;background:none;border:none;padding:13px 15px;display:flex;align-items:center;gap:12px}.chat-group-body{flex:1;min-width:0}.chat-group-name{font-weight:600;font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-group-meta{font-size:11.5px;color:#9aa09a}.chat-group-chevron{display:flex;flex:none;color:#adb2ac;transition:transform .18s}.chat-group-chevron.expanded{transform:rotate(180deg)}.chat-group-items{border-top:1px solid #f0eee8;padding:6px;display:flex;flex-direction:column;gap:2px}.chat-item{text-align:left;cursor:pointer;background:none;border:none;border-radius:10px;padding:9px 11px;display:flex;align-items:center;gap:11px;width:100%}.chat-item:hover{background:#f7f5f0}.chat-item-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);flex:none;opacity:.55}.chat-item-body{flex:1;min-width:0}.chat-item-title{font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-item-preview{font-size:11.5px;color:#adb2ac;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-item-time{font-size:11px;color:#adb2ac;flex:none}.empty-state{text-align:center;padding:44px 20px;color:#9aa09a}.empty-state-title{font-size:15px;font-weight:600;color:#6b736e;margin-bottom:6px}.empty-state-body{font-size:13px}.lesson-header{display:flex;align-items:flex-start;gap:15px;margin-bottom:18px}.lesson-header-avatar{width:52px;height:52px;flex:none;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:700}.lesson-header-body{flex:1;min-width:0}.lesson-header-title{font-weight:600;font-size:26px;letter-spacing:-.4px;margin:0 0 5px;line-height:1.1}.lesson-header-desc{margin:0 0 8px;color:#6b736e;font-size:14px}.lesson-header-meta{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:12.5px;color:#9aa09a}.tab-bar{display:flex;gap:4px;border-bottom:1px solid #e6e3db;margin-bottom:22px;overflow-x:auto}.tab-btn{border:none;background:none;cursor:pointer;padding:11px 14px;font-size:14px;font-weight:500;color:#9aa09a;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}.tab-btn.active{font-weight:600;color:#1f2421;border-bottom-color:var(--accent)}.quick-actions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:13px;margin-bottom:22px}.quick-action-card{text-align:left;cursor:pointer;border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:10px;min-height:118px;border:none}.quick-action-card.primary{background:var(--accent);color:#fff}.quick-action-card.secondary{background:#fff;color:#1f2421;border:1px solid #eceae4}.quick-action-card.secondary:hover{background:#fbfaf7}.quick-action-title{font-weight:600;font-size:15px}.quick-action-sub{font-size:12.5px;opacity:.85;margin-top:3px}.quick-action-sub.muted{color:#8a908a;opacity:1}.chat-slots-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:13px}.chat-slot-empty{cursor:pointer;background:#faf9f5;border:1.5px dashed #d8d4ca;border-radius:16px;padding:20px;display:flex;flex-direction:column;align-items:flex-start;gap:8px;min-height:140px;color:#8a908a;width:100%;text-align:left}.chat-slot-empty:hover{border-color:var(--accent);color:var(--accent)}.chat-slot-filled{background:#fff;border:1px solid #eceae4;border-radius:16px;padding:17px;display:flex;flex-direction:column;gap:10px;min-height:140px}.chat-slot-top{display:flex;align-items:center;justify-content:space-between}.chat-slot-badge{font-size:11px;font-weight:600;color:var(--accent);background:var(--accent-soft);padding:3px 8px;border-radius:20px}.chat-slot-time{font-size:11.5px;color:#adb2ac}.chat-slot-title{font-weight:600;font-size:14.5px;line-height:1.3}.chat-slot-preview{margin:0;font-size:12.5px;color:#8a908a;line-height:1.4;flex:1;overflow:hidden}.chat-slot-bottom{display:flex;align-items:center;justify-content:space-between}.chat-slot-count{font-size:11.5px;color:#adb2ac}.chat-slot-open-btn{border:1px solid #e0ddd4;background:#fff;color:#1f2421;border-radius:9px;padding:7px 13px;font-size:12.5px;font-weight:600;cursor:pointer}.chat-slot-open-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent)}.upload-dropzone{background:#fff;border:1.5px dashed #d2cec3;border-radius:16px;padding:30px 20px;text-align:center;margin-bottom:20px;cursor:pointer}.upload-dropzone:hover,.upload-dropzone.dragover{border-color:var(--accent);background:var(--accent-soft)}.upload-dropzone-icon{width:46px;height:46px;margin:0 auto 12px;border-radius:13px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center}.upload-dropzone-title{font-weight:600;font-size:15px;margin-bottom:4px}.upload-dropzone-sub{font-size:12.5px;color:#9aa09a}.upload-progress-track{max-width:340px;margin:0 auto;height:6px;border-radius:20px;background:#e6e3db;overflow:hidden}.upload-progress-fill{height:100%;background:var(--accent);border-radius:20px;transition:width .25s ease}.batch-issues{background:#fff;border:1px solid #eceae4;border-radius:12px;padding:10px 14px;margin:-6px 0 16px;display:flex;flex-direction:column;gap:4px}.batch-issue-row{font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.folder-block+.folder-block,.folder-block+.file-item,.file-item+.folder-block{margin-top:9px}.folder-row{display:flex;align-items:center;gap:4px;background:#f3f1ec;border:1px solid #e6e3db;border-radius:12px;padding:7px 10px}.folder-toggle{flex:1;min-width:0;display:flex;align-items:center;gap:8px;border:none;background:none;cursor:pointer;color:#3a403b;padding:2px 0;text-align:left}.folder-chevron{display:flex;flex:none;color:#9aa09a;transition:transform .15s}.folder-chevron.open{transform:rotate(90deg)}.folder-name{font-weight:600;font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.folder-count{font-size:11.5px;color:#9aa09a;flex:none}.folder-children{margin:7px 0 4px 13px;padding-left:13px;border-left:1.5px solid #e6e3db;display:flex;flex-direction:column;gap:9px}.missing-panel{background:#fff;border:1px solid #f0e2d6;border-radius:14px;padding:15px 17px;margin:-6px 0 16px}.missing-panel-title{font-weight:600;font-size:14px;color:#8a6d3b;margin-bottom:8px}.missing-panel-list{display:flex;flex-direction:column;gap:3px;margin-bottom:12px;max-height:180px;overflow-y:auto}.missing-panel-item{font-size:12.5px;color:#5a615b;font-family:ui-monospace,monospace;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.missing-panel-actions{display:flex;gap:10px}.file-summary-bar{display:flex;align-items:center;gap:14px;margin-bottom:14px;flex-wrap:wrap;font-size:12.5px}.file-summary-item{display:flex;align-items:center;gap:5px}.file-summary-dot{width:7px;height:7px;border-radius:50%}.file-list{display:flex;flex-direction:column;gap:9px}.file-item{background:#fff;border:1px solid #eceae4;border-radius:14px;padding:13px 15px;display:flex;align-items:center;gap:13px}.file-type-badge{width:36px;height:36px;flex:none;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:9.5px;font-weight:700;font-family:ui-monospace,monospace}.file-item-body{flex:1;min-width:0}.file-item-name{font-weight:600;font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-item-meta{font-size:11.5px;color:#9aa09a;margin-top:2px}.file-status-badge{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:600;padding:5px 10px;border-radius:20px;flex:none}.file-status-badge svg.spin{animation:ash-spin 1s linear infinite}.file-actions{display:flex;gap:2px;flex:none}.icon-btn{border:none;background:none;cursor:pointer;width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#8a908a}.icon-btn:hover{background:#f4f2ec;color:#3a403b}.source-card{background:#fff;border:1px solid #eceae4;border-radius:14px;padding:15px 16px}.source-card-head{display:flex;align-items:center;gap:11px;margin-bottom:11px}.source-card-file{font-weight:600;font-size:13.5px}.source-chips{display:flex;flex-wrap:wrap;gap:7px}.source-chip{font-size:12px;color:#5a615b;background:#f4f2ec;border:1px solid #ece9e2;border-radius:8px;padding:5px 10px}.debug-link-btn{margin-top:18px;border:1px solid #e0ddd4;background:#fff;color:#8a908a;border-radius:9px;padding:8px 13px;font-size:12px;cursor:pointer;display:inline-flex;align-items:center;gap:6px}.debug-link-btn:hover{color:#5a615b}.insight-banner{background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 22%,#ffffff);border-radius:14px;padding:15px 17px;margin-bottom:18px;display:flex;gap:12px;align-items:flex-start}.insight-banner-icon{color:var(--accent);flex:none;margin-top:1px}.insight-banner-title{font-weight:600;font-size:14px}.insight-banner-sub{font-size:12.5px;color:#5a736a;margin-top:2px}.insight-card{background:#fff;border:1px solid #eceae4;border-radius:16px;padding:17px 18px}.insight-card+.insight-card{margin-top:12px}.insight-card-head{display:flex;align-items:center;gap:9px;margin-bottom:9px}.insight-tag{font-size:11px;font-weight:600;padding:3px 9px;border-radius:20px}.insight-meta{font-size:11.5px;color:#adb2ac}.insight-text{margin:0 0 13px;font-size:14.5px;line-height:1.5;color:#2b302c}.insight-actions{display:flex;flex-wrap:wrap;gap:8px}.insight-action-btn{border:1px solid #e0ddd4;background:#faf9f5;color:#3a403b;border-radius:9px;padding:7px 13px;font-size:12.5px;font-weight:500;cursor:pointer}.insight-action-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent)}.chat-wrap{flex:1;display:flex;min-width:0;min-height:0}.chat-wrap.is-mobile{flex-direction:column}.chat-main-col{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}.chat-messages{flex:1;overflow-y:auto;padding:26px 0;min-height:0}.chat-messages-inner{max-width:720px;margin:0 auto;padding:0 22px;display:flex;flex-direction:column;gap:22px}.no-ready-card{background:#fff;border:1px solid #f0e2d6;border-radius:16px;padding:20px;display:flex;gap:13px;align-items:flex-start}.no-ready-icon{color:#b5843a;flex:none}.no-ready-title{font-weight:600;font-size:14.5px;margin-bottom:4px}.no-ready-body{font-size:13.5px;color:#6b736e;line-height:1.5}.bubble{animation:ash-up .3s ease}.bubble.user{align-self:flex-end;max-width:80%;background:var(--accent);color:#fff;padding:12px 16px;border-radius:18px 18px 4px;font-size:14.5px;line-height:1.5;white-space:pre-wrap}.bubble.assistant-row{display:flex;gap:12px;align-items:flex-start;animation:ash-up .3s ease}.bubble-avatar{width:30px;height:30px;flex:none;border-radius:9px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-top:2px}.bubble-content-col{flex:1;min-width:0}.badge-pill{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:600;padding:4px 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