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2px}.widget-formatting-toolbar__group{flex-wrap:wrap;align-items:center;gap:4px;display:inline-flex}.widget-formatting-toolbar--disabled .rich-text-toolbar button:disabled,.widget-formatting-toolbar--disabled .rich-text-toolbar select:disabled{opacity:.55;cursor:not-allowed}.widget-formatting-toolbar__hint{color:var(--muted,var(--color-ink-muted-48));margin:0;font-size:11px;line-height:1.35}.widget-formatting-toolbar__hint--error{color:#b91c1c}.widget-list-marker-style,.widget-insert-symbol{display:inline-flex;position:relative}.widget-insert-symbol__omega{justify-content:center;align-items:center;min-width:15px;font-size:.95rem;font-weight:600;line-height:1;display:inline-flex}.widget-insert-symbol__menu{top:calc(100% + 4px);z-index:1100;background:var(--color-surface,#fff);border:1px solid var(--color-border,#d1d5db);border-radius:var(--radius-sm,6px);grid-template-columns:1fr 1fr;gap:4px;min-width:11rem;padding:8px;display:grid;position:absolute;inset-inline-start:0;box-shadow:0 8px 24px #0f172a1f}.widget-insert-symbol__item{cursor:pointer;background:0 0;border:1px solid #0000;border-radius:4px;flex-direction:column;align-items:center;gap:4px;padding:8px 10px;display:flex}.widget-insert-symbol__item:hover,.widget-insert-symbol__item:focus-visible{background:var(--color-surface-pearl,#f3f4f6);border-color:var(--color-border,#d1d5db)}.widget-insert-symbol__glyph{font-size:1.25rem;line-height:1}.widget-insert-symbol__label{color:var(--color-ink-muted,#6b7280);font-size:.7rem}.widget-list-marker-style__menu{top:calc(100% + 4px);z-index:30;background:var(--color-surface,#fff);border:1px solid var(--color-border,#d1d5db);border-radius:var(--radius-sm,6px);flex-direction:column;min-width:9rem;padding:4px;display:flex;position:absolute;inset-inline-start:0;box-shadow:0 8px 24px #0f172a1f}.widget-list-marker-style__menu-item{text-align:start;cursor:pointer;background:0 0;border:0;border-radius:4px;padding:6px 10px}.widget-list-marker-style__menu-item:hover,.widget-list-marker-style__menu-item:focus-visible{background:var(--color-surface-pearl,#f3f4f6)}.widget-list-marker-customize{margin-top:var(--space-xs,8px);border:1px solid var(--color-border,#d1d5db);border-radius:var(--radius-sm,6px);background:var(--color-surface,#fff);padding:12px}.widget-list-marker-customize__title{margin:0 0 8px;font-size:12px;font-weight:600}.widget-list-marker-customize__row{align-items:center;gap:8px;margin-bottom:6px;display:flex}.widget-list-marker-customize__preview{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;font-size:12px;overflow:hidden}.widget-list-marker-customize__actions{gap:8px;margin-top:8px;display:flex}.widget-space-after-control,.widget-image-settings-control{align-items:center;gap:var(--space-xs);background:0 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10px}.widget-space-after-control__select,.widget-image-settings-control__select{min-height:var(--control-height);font-size:var(--control-font-size);border:1px solid var(--color-hairline);border-radius:var(--radius-md);background:var(--color-canvas);width:auto;padding:0 12px}.widget-space-after-control--compact .widget-space-after-control__select{color:#0f172a;appearance:none;cursor:pointer;background-color:#f8fafc;background-image:linear-gradient(45deg,#0000 50%,#64748b 50%),linear-gradient(135deg,#64748b 50%,#0000 50%);background-position:calc(100% - 10px) calc(50% - 1px),calc(100% - 6px) calc(50% - 1px);background-repeat:no-repeat;background-size:4px 4px,4px 4px;background-attachment:scroll;background-origin:padding-box;background-clip:border-box;border:1px solid #0f172a1a;border-radius:7px;height:1.7rem;min-height:1.7rem;padding:0 22px 0 8px;font-size:11px;font-weight:600}.widget-space-after-control--compact .widget-space-after-control__select:hover{background-color:#f1f5f9;border-color:#0f172a29}.widget-space-after-control--compact .widget-space-after-control__select:focus-visible{outline-offset:1px;outline:2px solid #2563eb}.widget-image-settings-control__width-row{align-items:center;gap:var(--space-xs);flex:12rem;min-width:10rem;display:flex}.widget-image-settings-control__range{min-width:6rem;accent-color:var(--color-primary,#2563eb);flex:auto}.widget-image-settings-control__value{min-width:2.75rem;font-size:var(--control-font-size);font-variant-numeric:tabular-nums;color:var(--color-ink);text-align:end}.widget-canvas{--widget-editor-font-size:13.5px;--widget-editor-line-height:1.35;--widget-editor-body-padding-y:.15rem;--widget-editor-body-padding-x:.25rem;outline:none}.widget-canvas .rich-text-editor{font-size:var(--widget-editor-font-size);line-height:var(--widget-editor-line-height);min-height:1.35em;padding:var(--widget-editor-body-padding-y) var(--widget-editor-body-padding-x);flex:0 auto}.widget-canvas .rich-text-editor p{margin:0 0 .25em}.widget-canvas .rich-text-editor ul,.widget-canvas .rich-text-editor ol{margin-top:0;margin-bottom:.25em;margin-inline-start:0;padding-inline-start:1.25rem}.widget-canvas .rich-text-editor li[data-marker-kind=bullet]::marker{content:"•"}.widget-canvas .rich-text-editor li[data-marker-kind=endash]::marker{content:"–"}.widget-canvas .rich-text-editor li[data-marker-kind=circle]::marker{content:"○"}.widget-canvas .rich-text-editor li[data-marker-kind=empty]{list-style-type:none}.widget-canvas .rich-text-editor li[data-marker-kind=empty]::marker{content:""}.widget-canvas .rich-text-editor li[data-marker-kind=asterisk]::marker{content:"*"}.widget-canvas .rich-text-editor li[data-marker-kind=number]{list-style-type:none}.widget-canvas .rich-text-editor li[data-marker-kind=number]::marker{content:attr(data-marker-number)}.widget-canvas math-field{font-size:.95em}.widget-canvas .rich-text-editor 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auto;box-shadow:0 1px 2px #0f172a0a,0 8px 20px #0f172a1a}.structured-widget-controls--table-external{margin-bottom:0;bottom:calc(100% + 6px)}.structured-widget-controls__divider{background:#0f172a1a;flex-shrink:0;width:1px;height:1rem;margin-inline:2px}.structured-widget-controls__btn{color:#334155;cursor:pointer;background:0 0;border:none;border-radius:7px;justify-content:center;align-items:center;gap:.28rem;min-width:1.7rem;min-height:1.7rem;padding:.2rem;font-size:.72rem;font-weight:600;line-height:1;transition:background-color .12s,color 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#0f172a14}.structured-widget-controls__btn--type-active:hover:not(:disabled){color:#1e40af;background:#fff}.widget-handles{pointer-events:none;position:absolute;inset:0}.widget-handles__h{border:1px solid 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var(--color-hairline);border-radius:var(--radius-md);font-size:var(--control-font-size);font-weight:var(--text-button-utility-weight)}.app-confirm-modal__cancel:hover:not(:disabled){background:var(--color-surface-pearl);color:var(--color-ink);border-color:var(--color-hairline)}.app-confirm-modal__cancel:focus-visible{outline:2px solid var(--color-hairline);outline-offset:2px}.app-confirm-modal__confirm{min-height:var(--control-height);padding:0 var(--control-padding-x);font-size:var(--control-font-size);border-radius:var(--radius-md);font-weight:600}.app-confirm-modal__confirm--danger{background:var(--color-danger);border:1px solid var(--color-danger);color:var(--color-on-primary)}.app-confirm-modal__confirm--danger:hover:not(:disabled){background:var(--color-danger-hover);border-color:var(--color-danger-hover)}.app-confirm-modal__confirm--danger:focus-visible{outline:2px solid var(--color-danger);outline-offset:2px}.teacher-note-modal__hint{margin:0 0 var(--space-sm)}.teacher-note-modal__label{color:var(--color-ink);font-size:var(--text-caption-size);font-weight:var(--text-caption-strong-weight);margin-bottom:6px;display:block}.teacher-note-modal__textarea{resize:vertical;border:1px solid var(--color-hairline);border-radius:var(--radius-md);background:var(--color-canvas);width:100%;min-height:10rem;color:var(--color-ink);font:inherit;padding:10px 12px;line-height:1.45;display:block}.teacher-note-thumb-badge{z-index:3;color:#fff;letter-spacing:0;pointer-events:none;background:#1d4ed8;border-radius:4px;justify-content:center;align-items:center;width:18px;height:18px;font-size:11px;font-weight:800;line-height:1;display:inline-flex;position:absolute;top:5px;left:5px;box-shadow:0 1px 2px #0f172a59}.teacher-note-thumb-badge--md{border-radius:6px;width:26px;height:26px;font-size:14px;top:8px;left:8px}.teacher-note-modal__textarea:focus-visible{outline:2px solid var(--color-focus,#2563eb);outline-offset:1px}.edit-action-btn--has-note{box-shadow:inset 0 -2px 0 var(--color-accent,#2563eb)}.widget-tex-source-modal{background:var(--color-canvas);border:1px solid color-mix(in srgb, var(--color-ink) 8%, var(--color-hairline));width:min(920px,100%);max-height:calc(100vh - 32px);box-shadow:0 1px 2px color-mix(in srgb, var(--color-ink) 4%, transparent), 0 22px 48px color-mix(in srgb, var(--color-ink) 16%, transparent);border-radius:16px;flex-direction:column;padding:0;display:flex;overflow:hidden}.widget-tex-source-modal--positioned{z-index:1;margin:0;position:fixed}.widget-tex-source-modal--dragging{-webkit-user-select:none;user-select:none;box-shadow:0 2px 6px color-mix(in srgb, var(--color-ink) 6%, transparent), 0 28px 56px color-mix(in srgb, var(--color-ink) 22%, transparent)}.widget-tex-source-modal__header{justify-content:space-between;align-items:flex-start;gap:var(--space-sm);border-bottom:1px solid color-mix(in srgb, var(--color-ink) 6%, 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var(--space-sm);color:var(--bs-text-muted,#8e8e93);font-size:var(--bs-helper-size,12px);text-align:start;border:0;border-radius:0;padding:0;line-height:1.4}.session-outline-section-empty{color:var(--color-ink-muted-48);margin:0;padding:8px 6px;font-size:12px;line-height:1.35}.session-outline-section__move{width:26px;min-width:26px;min-height:28px;color:var(--bs-text-muted,#8e8e93);background:0 0;border:0;border-radius:7px;justify-content:center;align-items:center;padding:0;display:inline-flex}.session-outline-section__move:hover:not(:disabled){background:var(--bs-surface-panel,#fff);color:var(--bs-text-primary,#1d1d1f)}.session-outline-section--static{cursor:default;grid-template-columns:minmax(0,1fr) auto;padding:6px 8px}.session-outline-list{gap:6px;min-width:0;padding-block-start:6px;padding-inline-start:8px;display:grid}.session-outline-drop-line{border-radius:var(--radius-pill);background:0 0;height:4px}.session-outline-drop-line.active{background:color-mix(in srgb, 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#00000008}.session-outline-item:hover{border-color:var(--bs-border-strong,#d2d2d7)}.session-outline-item:focus-visible,.session-outline-item.selected{border-color:color-mix(in srgb, var(--bs-action-primary,#06c) 35%, var(--bs-border-default,#e5e5ea));box-shadow:0 0 0 2px color-mix(in srgb, var(--bs-focus-ring,var(--color-primary-focus)) 50%, transparent), 0 1px 2px #0000000a;outline:none}.session-outline-item.dragging{opacity:.5}.session-outline-item--locked{background:var(--bs-surface-subtle,#f7f7f8)}.session-outline-item__title,.session-outline-question strong{color:var(--bs-text-primary,var(--color-ink));text-overflow:ellipsis;font-size:12px;font-weight:650;line-height:1.35;overflow:hidden}.session-outline-item__top{align-items:center;gap:6px;min-width:0;display:flex}.session-outline-handle{width:26px;min-width:26px;min-height:26px;color:var(--bs-text-muted,#8e8e93);cursor:grab;touch-action:manipulation;background:0 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var(--bs-border-default,#e5e5ea);background:var(--bs-surface-subtle,#f7f7f8);width:100%;max-height:132px;color:var(--bs-text-muted,#8e8e93);border-radius:8px;place-items:center;font-size:11px;display:grid;position:relative;overflow:hidden}.session-outline-thumbnail img{object-fit:cover;object-position:top center;background:var(--bs-surface-panel,#fff);width:100%;height:100%}.session-outline-question{border:1px solid var(--bs-border-default,#e5e5ea);background:var(--bs-surface-subtle,#f7f7f8);border-radius:8px;align-content:center;gap:4px;min-height:52px;padding:8px;display:grid}.session-outline-question .badge{justify-self:start}.session-outline-role-badge{white-space:nowrap;border:1px solid #0000;font-weight:650;line-height:1.3}.session-outline-role-badge--example{color:#1d4ed8;background:#eff6ff;border-color:#bfdbfe}.session-outline-role-badge--interactive_example{color:#6d28d9;background:#f5f3ff;border-color:#c4b5fd}.session-outline-role-badge--practice{color:#15803d;background:#f0fdf4;border-color:#86efac}.session-outline-role-badge--exam{color:#b45309;background:#fffbeb;border-color:#fcd34d}.session-outline-question--pending{color:var(--bs-text-muted,#64748b);font-size:12px}.session-outline-thumbnail-pending{box-sizing:border-box;justify-content:center;align-items:center;width:100%;height:100%;padding:14px;display:flex}.session-outline-thumbnail-pending .compile-preview-loader{width:min(56px,42%);min-height:0}.session-outline-thumbnail-pending .compile-preview-loader__mark{width:100%}.session-outline-thumbnail--question img{object-fit:contain;background:#fff}.session-outline-backdrop{display:none}.sr-only{clip:rect(0, 0, 0, 0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}@media (width<=1359px){.build-session-grid{grid-template-columns:minmax(300px,360px) minmax(0,1fr)}.session-items-panel{max-height:calc(100vh - 152px);position:sticky;top:144px;overflow:hidden}.session-items-scroll{min-height:0;padding-inline-end:4px;overflow:hidden auto}.session-outline-toggle,.session-outline-close{display:inline-flex}.session-outline-panel{z-index:96;top:144px;opacity:0;pointer-events:none;visibility:hidden;width:min(360px,100vw - 32px);height:calc(100vh - 160px);max-height:none;transition:inset-inline-end .16s,opacity .16s;position:fixed;inset-inline-end:-120%}.session-outline-panel.drawer-open{opacity:1;pointer-events:auto;visibility:visible;inset-inline-end:16px}.session-outline-backdrop{z-index:95;opacity:0;pointer-events:none;background:#0000003d;transition:opacity .16s;display:block;position:fixed;inset:136px 0 0}.session-outline-backdrop.active{opacity:1;pointer-events:auto}}@media (width<=900px){.build-session-grid{grid-template-columns:1fr}.session-items-panel{max-height:none;position:static;overflow:visible}.session-items-scroll{max-height:none;padding-inline-end:0;overflow:visible}.session-outline-panel{border-radius:0;width:100%;height:calc(100vh - 136px)}.session-outline-panel.drawer-open{inset-inline:0}}.session-outline-panel[dir=rtl] .session-outline-list{padding-inline-start:12px}.session-arrange-backdrop{z-index:1400;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:radial-gradient(circle at 12% 8%,#0066cc29,#0000 32%),radial-gradient(circle at 88% 12%,#ff95001f,#0000 28%),#0c101880;justify-content:center;align-items:stretch;padding:clamp(10px,2.5vh,24px) clamp(10px,2.5vw,24px);animation:.2s 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.14s}.session-arrange-gap.active{background:linear-gradient(180deg, color-mix(in srgb, var(--bs-action-primary,#06c) 15%, transparent), color-mix(in srgb, var(--bs-action-primary,#06c) 70%, transparent), color-mix(in srgb, var(--bs-action-primary,#06c) 15%, transparent));width:22px;box-shadow:0 0 0 3px color-mix(in srgb, var(--bs-action-primary,#06c) 12%, transparent);flex-basis:22px}.session-arrange-gap--end{color:#0000;flex:28px;place-items:center;min-width:28px;font-size:12px;font-weight:600;display:grid}.session-arrange-gap--visible{color:#94a3b8}.session-arrange-gap--lonely{border:1px dashed color-mix(in srgb, var(--bs-action-primary,#06c) 35%, #cbd5e1);min-height:112px;color:var(--bs-action-primary,#06c);background:color-mix(in srgb, var(--bs-action-primary,#06c) 5%, #fff);border-radius:14px;flex:100%}.session-arrange-gap--lonely.active{background:color-mix(in srgb, var(--bs-action-primary,#06c) 10%, #fff)}.session-arrange-tile{cursor:grab;background:#fff;border:1px solid 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