.editor_exerciseBuilder___VvnR{display:grid;gap:14px;padding:16px;border:1px solid var(--border-primary);border-radius:10px;background:var(--background-primary)}.editor_builderHeader__kM7lS{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.editor_builderHeader__kM7lS h2{margin:0 0 5px;color:var(--text-primary);font-size:20px}.editor_builderHeader__kM7lS p{margin:0;color:var(--text-secondary);line-height:1.45}.editor_exerciseCard__JW00W{display:grid;gap:14px;padding:14px;border:1px solid var(--border-primary);border-radius:10px;background:color-mix(in srgb,var(--background-secondary) 45%,transparent)}.editor_exerciseIndex__9WFvG{color:var(--color-accent-text);font-size:12px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.editor_exerciseActions__LSXya{display:flex;align-items:center;justify-content:flex-end;gap:6px;flex-wrap:wrap}.editor_exerciseActions__LSXya button:disabled{cursor:not-allowed;opacity:.45}.editor_itemCommonGrid__RSFJz,.editor_typeFields__vLC2X{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.editor_itemCommonGrid__RSFJz label,.editor_typeFields__vLC2X label{display:grid;gap:5px;min-width:0}.editor_itemCommonGrid__RSFJz span,.editor_typeFields__vLC2X span{color:var(--text-tertiary);font-size:11px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox]),.editor_itemCommonGrid__RSFJz select,.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox]),.editor_typeFields__vLC2X select{width:100%;min-width:0;min-height:var(--control-height-md);padding:var(--control-padding-md);border:1px solid var(--border-primary);border-radius:var(--control-radius);outline:none;background:var(--background-secondary);color:var(--text-primary);font-family:inherit;font-size:var(--control-font-md);line-height:1.2;transition:border-color .15s ease,box-shadow .15s ease}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox])::placeholder,.editor_itemCommonGrid__RSFJz select::placeholder,.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox])::placeholder,.editor_typeFields__vLC2X select::placeholder{color:var(--text-tertiary)}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox]):hover:not(:disabled):not(:focus),.editor_itemCommonGrid__RSFJz select:hover:not(:disabled):not(:focus),.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox]):hover:not(:disabled):not(:focus),.editor_typeFields__vLC2X select:hover:not(:disabled):not(:focus){border-color:var(--border-secondary)}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox]):focus,.editor_itemCommonGrid__RSFJz select:focus,.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox]):focus,.editor_typeFields__vLC2X select:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox]):disabled,.editor_itemCommonGrid__RSFJz select:disabled,.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox]):disabled,.editor_typeFields__vLC2X select:disabled{background:var(--background-tertiary);color:var(--text-disabled);cursor:not-allowed}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox]):-webkit-autofill,.editor_itemCommonGrid__RSFJz select:-webkit-autofill,.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox]):-webkit-autofill,.editor_typeFields__vLC2X select:-webkit-autofill{-webkit-text-fill-color:var(--text-primary);box-shadow:0 0 0 1000px var(--background-secondary) inset;caret-color:var(--text-primary)}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox]):-webkit-autofill:focus,.editor_itemCommonGrid__RSFJz select:-webkit-autofill:focus,.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox]):-webkit-autofill:focus,.editor_typeFields__vLC2X select:-webkit-autofill:focus{box-shadow:0 0 0 1000px var(--background-secondary) inset,0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox])[aria-invalid=true],.editor_itemCommonGrid__RSFJz select[aria-invalid=true],.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox])[aria-invalid=true],.editor_typeFields__vLC2X select[aria-invalid=true]{border-color:var(--color-error)}.editor_itemCommonGrid__RSFJz input:not([type=radio]):not([type=checkbox])[aria-invalid=true]:focus,.editor_itemCommonGrid__RSFJz select[aria-invalid=true]:focus,.editor_typeFields__vLC2X input:not([type=radio]):not([type=checkbox])[aria-invalid=true]:focus,.editor_typeFields__vLC2X select[aria-invalid=true]:focus{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-error) 22%,transparent)}.editor_itemCommonGrid__RSFJz textarea,.editor_typeFields__vLC2X textarea{width:100%;min-width:0;min-height:var(--control-height-md);padding:var(--control-padding-md);border:1px solid var(--border-primary);border-radius:var(--control-radius);outline:none;background:var(--background-secondary);color:var(--text-primary);font-family:inherit;font-size:var(--control-font-md);line-height:1.2;transition:border-color .15s ease,box-shadow .15s ease}.editor_itemCommonGrid__RSFJz textarea::placeholder,.editor_typeFields__vLC2X textarea::placeholder{color:var(--text-tertiary)}.editor_itemCommonGrid__RSFJz textarea:hover:not(:disabled):not(:focus),.editor_typeFields__vLC2X textarea:hover:not(:disabled):not(:focus){border-color:var(--border-secondary)}.editor_itemCommonGrid__RSFJz textarea:focus,.editor_typeFields__vLC2X textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_itemCommonGrid__RSFJz textarea:disabled,.editor_typeFields__vLC2X textarea:disabled{background:var(--background-tertiary);color:var(--text-disabled);cursor:not-allowed}.editor_itemCommonGrid__RSFJz textarea:-webkit-autofill,.editor_typeFields__vLC2X textarea:-webkit-autofill{-webkit-text-fill-color:var(--text-primary);box-shadow:0 0 0 1000px var(--background-secondary) inset;caret-color:var(--text-primary)}.editor_itemCommonGrid__RSFJz textarea:-webkit-autofill:focus,.editor_typeFields__vLC2X textarea:-webkit-autofill:focus{box-shadow:0 0 0 1000px var(--background-secondary) inset,0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_itemCommonGrid__RSFJz textarea[aria-invalid=true],.editor_typeFields__vLC2X textarea[aria-invalid=true]{border-color:var(--color-error)}.editor_itemCommonGrid__RSFJz textarea[aria-invalid=true]:focus,.editor_typeFields__vLC2X textarea[aria-invalid=true]:focus{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-error) 22%,transparent)}.editor_itemCommonGrid__RSFJz textarea,.editor_typeFields__vLC2X textarea{min-height:92px;resize:vertical;line-height:1.5}.editor_exerciseTitleRow__nQ8pz{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.editor_compactTypePicker__pBCPE{display:grid;gap:6px;padding:8px;border:1px solid var(--border-primary);border-radius:8px;background:var(--background-secondary)}.editor_compactTypePicker__pBCPE button{display:grid;gap:2px;padding:8px;border:0;border-radius:6px;background:var(--background-primary);color:var(--text-primary);text-align:left;cursor:pointer}.editor_compactTypePicker__pBCPE strong{font-size:12px}.editor_compactTypePicker__pBCPE span{color:var(--text-tertiary);font-size:10px;line-height:1.3}.editor_focusedItemHeader__m3ayS,.editor_visualEditorFooter__yM7ys,.editor_visualEditorHeader__4G0zu{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.editor_editorModeSwitch__7hzDV{display:flex;gap:4px;padding:4px;border-radius:var(--control-radius);background:var(--background-secondary)}.editor_editorModeSwitch__7hzDV button{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:0;border-radius:var(--control-radius-sm);background:rgba(0,0,0,0);color:var(--text-secondary);cursor:pointer;font:inherit;font-weight:var(--control-weight);line-height:1.2;text-decoration:none;transition:background .15s ease,color .15s ease;min-height:var(--control-height-sm);padding:var(--control-padding-sm);font-size:var(--control-font-sm)}.editor_editorModeSwitch__7hzDV button:hover:not([aria-selected=true]):not([aria-pressed=true]){color:var(--text-primary)}.editor_editorModeSwitch__7hzDV button[aria-pressed=true]{background:var(--background-primary);color:var(--text-primary);box-shadow:0 1px 3px color-mix(in srgb,var(--text-primary) 12%,transparent)}.editor_exerciseOverviewFields__ys46C{display:grid;grid-template-columns:minmax(180px,.34fr) minmax(0,1fr);gap:10px}.editor_exerciseOverviewFields__ys46C label{display:grid;gap:5px}.editor_exerciseOverviewFields__ys46C span{display:flex;align-items:baseline;gap:6px;color:var(--text-tertiary);font-size:11px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.editor_exerciseOverviewFields__ys46C small{color:var(--text-tertiary);font-size:10px;font-weight:500;letter-spacing:0;text-transform:none}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox]),.editor_exerciseOverviewFields__ys46C select{width:100%;min-width:0;min-height:var(--control-height-md);padding:var(--control-padding-md);border:1px solid var(--border-primary);border-radius:var(--control-radius);outline:none;background:var(--background-secondary);color:var(--text-primary);font-family:inherit;font-size:var(--control-font-md);line-height:1.2;transition:border-color .15s ease,box-shadow .15s ease}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox])::placeholder,.editor_exerciseOverviewFields__ys46C select::placeholder{color:var(--text-tertiary)}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox]):hover:not(:disabled):not(:focus),.editor_exerciseOverviewFields__ys46C select:hover:not(:disabled):not(:focus){border-color:var(--border-secondary)}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox]):focus,.editor_exerciseOverviewFields__ys46C select:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox]):disabled,.editor_exerciseOverviewFields__ys46C select:disabled{background:var(--background-tertiary);color:var(--text-disabled);cursor:not-allowed}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox]):-webkit-autofill,.editor_exerciseOverviewFields__ys46C select:-webkit-autofill{-webkit-text-fill-color:var(--text-primary);box-shadow:0 0 0 1000px var(--background-secondary) inset;caret-color:var(--text-primary)}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox]):-webkit-autofill:focus,.editor_exerciseOverviewFields__ys46C select:-webkit-autofill:focus{box-shadow:0 0 0 1000px var(--background-secondary) inset,0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox])[aria-invalid=true],.editor_exerciseOverviewFields__ys46C select[aria-invalid=true]{border-color:var(--color-error)}.editor_exerciseOverviewFields__ys46C input:not([type=radio]):not([type=checkbox])[aria-invalid=true]:focus,.editor_exerciseOverviewFields__ys46C select[aria-invalid=true]:focus{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-error) 22%,transparent)}.editor_visualInstructionField__PTu3S{display:grid;gap:5px}.editor_visualInstructionField__PTu3S span{color:var(--text-tertiary);font-size:11px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.editor_visualInstructionField__PTu3S textarea{width:100%;min-width:0;min-height:var(--control-height-md);padding:var(--control-padding-md);border:1px solid var(--border-primary);border-radius:var(--control-radius);outline:none;background:var(--background-secondary);color:var(--text-primary);font-family:inherit;font-size:var(--control-font-md);line-height:1.2;transition:border-color .15s ease,box-shadow .15s ease}.editor_visualInstructionField__PTu3S textarea::placeholder{color:var(--text-tertiary)}.editor_visualInstructionField__PTu3S textarea:hover:not(:disabled):not(:focus){border-color:var(--border-secondary)}.editor_visualInstructionField__PTu3S textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_visualInstructionField__PTu3S textarea:disabled{background:var(--background-tertiary);color:var(--text-disabled);cursor:not-allowed}.editor_visualInstructionField__PTu3S textarea:-webkit-autofill{-webkit-text-fill-color:var(--text-primary);box-shadow:0 0 0 1000px var(--background-secondary) inset;caret-color:var(--text-primary)}.editor_visualInstructionField__PTu3S textarea:-webkit-autofill:focus{box-shadow:0 0 0 1000px var(--background-secondary) inset,0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_visualInstructionField__PTu3S textarea[aria-invalid=true]{border-color:var(--color-error)}.editor_visualInstructionField__PTu3S textarea[aria-invalid=true]:focus{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-error) 22%,transparent)}.editor_visualInstructionField__PTu3S textarea{min-height:96px;resize:vertical;line-height:1.5}.editor_itemTabs__CYZ47{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 0;border-top:1px solid var(--border-primary);border-bottom:1px solid var(--border-primary)}.editor_itemTabs__CYZ47>span{display:flex;align-items:baseline;gap:7px;color:var(--text-secondary);font-size:12px;font-weight:800}.editor_itemTabs__CYZ47>span small{color:var(--text-tertiary);font-size:10px;font-weight:700}.editor_itemTabs__CYZ47>div{display:flex;align-items:center;justify-content:flex-end;gap:5px;flex-wrap:wrap}.editor_itemTabs__CYZ47 button{min-height:var(--control-height-sm);padding:var(--control-padding-sm);border-radius:var(--control-radius-sm);min-width:var(--control-height-sm);border:1px solid var(--border-primary);background:var(--background-primary);color:var(--text-secondary);cursor:pointer;font-family:inherit;font-size:var(--control-font-sm);font-weight:var(--control-weight);line-height:1.2}.editor_itemTabs__CYZ47 button[aria-current=true]{border-color:var(--color-primary);background:var(--color-primary);color:var(--color-on-accent)}.editor_itemTabs__CYZ47 .editor_addItemButton__lCQgZ{color:var(--color-accent-text)}.editor_focusedItemHeader__m3ayS{align-items:center}.editor_focusedItemHeader__m3ayS>div:first-child{display:grid;gap:3px}.editor_focusedItemHeader__m3ayS span{color:var(--color-accent-text);font-size:11px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.editor_focusedItemHeader__m3ayS strong{color:var(--text-primary);font-size:15px}.editor_choiceOptionEditor__1Wq_m{display:grid;gap:8px;min-width:0;margin:0;padding:0;border:0}.editor_choiceOptionEditor__1Wq_m legend{margin-bottom:7px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.editor_choiceOptionEditor__1Wq_m legend,.editor_choiceOptionEditor__1Wq_m>small{color:var(--text-tertiary);font-size:11px}.editor_choiceOptionEditor__1Wq_m>button{justify-self:start}.editor_choiceOptionRow__f3J5_{display:flex;align-items:center;gap:8px;min-width:0;cursor:pointer;line-height:1.2}.editor_choiceOptionRow__f3J5_ input[type=checkbox],.editor_choiceOptionRow__f3J5_ input[type=radio]{flex:0 0 auto;width:17px;height:17px;margin:0;accent-color:var(--color-primary)}.editor_choiceOptionRow__f3J5_{display:grid;grid-template-columns:20px minmax(0,1fr) auto}.editor_categoryManager__prQ_c{display:grid;grid-template-columns:minmax(180px,.7fr) minmax(0,1.3fr);gap:18px;padding:14px;border:1px solid color-mix(in srgb,var(--color-primary) 34%,var(--border-primary));border-radius:10px;background:color-mix(in srgb,var(--color-primary) 5%,var(--background-primary))}.editor_categoryManager__prQ_c>div:first-child{display:grid;align-content:start;gap:5px}.editor_categoryManager__prQ_c strong{color:var(--text-primary);font-size:13px}.editor_categoryManager__prQ_c span{color:var(--text-tertiary);font-size:12px;line-height:1.45}.editor_categoryListEditor__O0GcL,.editor_stringListEditor__B70Ql{display:grid;gap:8px;min-width:0;margin:0;padding:0;border:0}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox]),.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox]){width:100%;min-width:0;min-height:var(--control-height-md);padding:var(--control-padding-md);border:1px solid var(--border-primary);border-radius:var(--control-radius);outline:none;background:var(--background-secondary);color:var(--text-primary);font-family:inherit;font-size:var(--control-font-md);line-height:1.2;transition:border-color .15s ease,box-shadow .15s ease}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox])::placeholder,.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox])::placeholder{color:var(--text-tertiary)}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox]):hover:not(:disabled):not(:focus),.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox]):hover:not(:disabled):not(:focus){border-color:var(--border-secondary)}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox]):focus,.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox]):focus{border-color:var(--color-primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox]):disabled,.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox]):disabled{background:var(--background-tertiary);color:var(--text-disabled);cursor:not-allowed}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox]):-webkit-autofill,.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox]):-webkit-autofill{-webkit-text-fill-color:var(--text-primary);box-shadow:0 0 0 1000px var(--background-secondary) inset;caret-color:var(--text-primary)}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox]):-webkit-autofill:focus,.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox]):-webkit-autofill:focus{box-shadow:0 0 0 1000px var(--background-secondary) inset,0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox])[aria-invalid=true],.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox])[aria-invalid=true]{border-color:var(--color-error)}.editor_categoryListEditor__O0GcL input:not([type=radio]):not([type=checkbox])[aria-invalid=true]:focus,.editor_stringListEditor__B70Ql input:not([type=radio]):not([type=checkbox])[aria-invalid=true]:focus{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-error) 22%,transparent)}.editor_categoryListEditor__O0GcL legend,.editor_stringListEditor__B70Ql legend{margin-bottom:7px;color:var(--text-tertiary);font-size:11px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.editor_categoryListEditor__O0GcL>button,.editor_stringListEditor__B70Ql>button{justify-self:start}.editor_categoryListEditor__O0GcL>div,.editor_stringListRow__5gDzL{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px;align-items:center}.editor_booleanChoiceEditor__I4Bup{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;border:0}.editor_booleanChoiceEditor__I4Bup legend{width:100%;margin-bottom:1px;color:var(--text-tertiary);font-size:11px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.editor_booleanChoiceEditor__I4Bup label{display:flex;grid-template-columns:none;align-items:center;gap:7px;min-height:var(--control-height-md);padding:8px 12px;border:1px solid var(--border-primary);border-radius:var(--control-radius);cursor:pointer}.editor_booleanChoiceEditor__I4Bup label:has(input:checked){border-color:var(--color-primary);background:color-mix(in srgb,var(--color-primary) 9%,var(--background-primary))}.editor_itemSettings__xYVA8{border-top:1px solid var(--border-primary);padding-top:10px}.editor_itemSettings__xYVA8 summary{display:flex;align-items:center;gap:7px;cursor:pointer;line-height:1.2;list-style:none}.editor_itemSettings__xYVA8 summary::-webkit-details-marker{display:none}.editor_itemSettings__xYVA8 summary:before{content:"";flex:0 0 auto;width:14px;height:14px;background-color:currentColor;-webkit-mask:var(--chevron-down) center/14px 14px no-repeat;mask:var(--chevron-down) center/14px 14px no-repeat;transform:rotate(-90deg);transition:transform .15s ease}.editor_itemSettings__xYVA8 summary{color:var(--color-accent-text);font-size:13px;font-weight:800}.editor_itemSettings__xYVA8 summary:hover{text-decoration:underline}.editor_itemSettings__xYVA8[open] summary{margin-bottom:10px}.editor_itemSettings__xYVA8[open] summary:before{transform:rotate(0deg)}.editor_typeFieldsNested__6xngz{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.editor_typeFieldsNested__6xngz label{display:grid;gap:5px}.editor_visualEditorFooter__yM7ys{align-items:center;padding-top:4px}.editor_previewStudentCard__ryU5Z{display:grid;gap:18px;max-width:680px;padding:22px;border:1px solid var(--border-primary);border-radius:12px;background:var(--background-primary)}.editor_previewStudentCard__ryU5Z header{display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px}.editor_previewStudentCard__ryU5Z header>span{display:grid;place-items:center;width:34px;height:34px;border-radius:8px;background:var(--background-secondary);color:var(--color-accent-text);font-size:12px;font-weight:900}.editor_previewStudentCard__ryU5Z h3,.editor_previewStudentCard__ryU5Z p{margin:0}.editor_previewStudentCard__ryU5Z h3{color:var(--text-primary);font-size:17px}.editor_previewStudentCard__ryU5Z p{margin-top:4px;color:var(--text-secondary);font-size:13px}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox]),.editor_previewStudentCard__ryU5Z select{width:100%;min-width:0;min-height:var(--control-height-md);padding:var(--control-padding-md);border:1px solid var(--border-primary);border-radius:var(--control-radius);outline:none;background:var(--background-secondary);color:var(--text-primary);font-family:inherit;font-size:var(--control-font-md);line-height:1.2;transition:border-color .15s ease,box-shadow .15s ease}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox])::placeholder,.editor_previewStudentCard__ryU5Z select::placeholder{color:var(--text-tertiary)}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox]):hover:not(:disabled):not(:focus),.editor_previewStudentCard__ryU5Z select:hover:not(:disabled):not(:focus){border-color:var(--border-secondary)}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox]):focus,.editor_previewStudentCard__ryU5Z select:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox]):disabled,.editor_previewStudentCard__ryU5Z select:disabled{background:var(--background-tertiary);color:var(--text-disabled);cursor:not-allowed}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox]):-webkit-autofill,.editor_previewStudentCard__ryU5Z select:-webkit-autofill{-webkit-text-fill-color:var(--text-primary);box-shadow:0 0 0 1000px var(--background-secondary) inset;caret-color:var(--text-primary)}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox]):-webkit-autofill:focus,.editor_previewStudentCard__ryU5Z select:-webkit-autofill:focus{box-shadow:0 0 0 1000px var(--background-secondary) inset,0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox])[aria-invalid=true],.editor_previewStudentCard__ryU5Z select[aria-invalid=true]{border-color:var(--color-error)}.editor_previewStudentCard__ryU5Z input:not([type=radio]):not([type=checkbox])[aria-invalid=true]:focus,.editor_previewStudentCard__ryU5Z select[aria-invalid=true]:focus{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-error) 22%,transparent)}.editor_previewStudentCard__ryU5Z textarea{width:100%;min-width:0;min-height:var(--control-height-md);padding:var(--control-padding-md);border:1px solid var(--border-primary);border-radius:var(--control-radius);outline:none;background:var(--background-secondary);color:var(--text-primary);font-family:inherit;font-size:var(--control-font-md);line-height:1.2;transition:border-color .15s ease,box-shadow .15s ease}.editor_previewStudentCard__ryU5Z textarea::placeholder{color:var(--text-tertiary)}.editor_previewStudentCard__ryU5Z textarea:hover:not(:disabled):not(:focus){border-color:var(--border-secondary)}.editor_previewStudentCard__ryU5Z textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_previewStudentCard__ryU5Z textarea:disabled{background:var(--background-tertiary);color:var(--text-disabled);cursor:not-allowed}.editor_previewStudentCard__ryU5Z textarea:-webkit-autofill{-webkit-text-fill-color:var(--text-primary);box-shadow:0 0 0 1000px var(--background-secondary) inset;caret-color:var(--text-primary)}.editor_previewStudentCard__ryU5Z textarea:-webkit-autofill:focus{box-shadow:0 0 0 1000px var(--background-secondary) inset,0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.editor_previewStudentCard__ryU5Z textarea[aria-invalid=true]{border-color:var(--color-error)}.editor_previewStudentCard__ryU5Z textarea[aria-invalid=true]:focus{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-error) 22%,transparent)}.editor_previewStudentCard__ryU5Z textarea{min-height:96px;resize:vertical;line-height:1.5}.editor_previewStudentCard__ryU5Z>button{justify-self:end}.editor_previewExampleNote__mU8Fb{color:var(--color-accent-text);font-weight:700}.editor_previewPrompt__ODWVJ{display:grid;gap:4px;color:var(--text-primary)}.editor_previewPrompt__ODWVJ small{color:var(--text-tertiary)}.editor_previewChoices__HfS8j{display:grid;gap:7px}.editor_previewChoices__HfS8j label{display:flex;align-items:center;gap:9px;padding:10px 11px;border:1px solid var(--border-primary);border-radius:8px;color:var(--text-primary)}.editor_previewPlaceholder__Uiu2x{color:var(--text-tertiary);font-size:13px}.editor_materialEditWorkspace__XimfA{display:grid;gap:14px}.editor_materialSaveBar__w3HC1{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:56px;padding:8px 10px 8px 14px;border:1px solid var(--border-primary);border-radius:8px;background:color-mix(in srgb,var(--background-primary) 94%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.editor_materialSaveBar__w3HC1[data-state=error]{border-color:var(--color-error)}.editor_materialSaveBar__w3HC1[data-state=error] span{color:var(--error-text);font-weight:600}.editor_materialSaveBar__w3HC1>div{display:grid;gap:2px}.editor_materialSaveBar__w3HC1 strong{color:var(--text-primary);font-size:13px}.editor_materialSaveBar__w3HC1 span{color:var(--text-tertiary);font-size:11px}.editor_materialEditorTabs__fqAJJ{display:flex;gap:4px;padding:4px;border-radius:var(--control-radius);background:var(--background-secondary);border:1px solid var(--border-primary)}.editor_materialEditorTabs__fqAJJ button{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:0;border-radius:var(--control-radius-sm);background:rgba(0,0,0,0);color:var(--text-secondary);cursor:pointer;font:inherit;font-weight:var(--control-weight);line-height:1.2;text-decoration:none;transition:background .15s ease,color .15s ease;min-height:var(--control-height-md);padding:var(--control-padding-md);font-size:var(--control-font-md)}.editor_materialEditorTabs__fqAJJ button:hover:not([aria-selected=true]):not([aria-pressed=true]){color:var(--text-primary)}.editor_materialEditorTabs__fqAJJ button[aria-selected=true]{background:var(--background-primary);color:var(--text-primary);box-shadow:0 1px 3px color-mix(in srgb,var(--text-primary) 10%,transparent)}.editor_materialEditorTabs__fqAJJ button span{min-width:19px;padding:2px 5px;border-radius:5px;background:var(--background-secondary);color:var(--text-tertiary);font-size:10px}.editor_warning__tg0eR{padding:10px 12px;border-radius:8px;background:var(--warning-background);color:var(--color-warning-text);font-weight:600}.editor_fieldError__weST_{margin:0;color:var(--error-text);font-size:12px;font-weight:600}@media(max-width:768px){.editor_focusedItemHeader__m3ayS,.editor_visualEditorFooter__yM7ys,.editor_visualEditorHeader__4G0zu{flex-direction:column;align-items:stretch}.editor_editorModeSwitch__7hzDV{align-self:stretch}.editor_editorModeSwitch__7hzDV button{flex:1 1}.editor_categoryManager__prQ_c,.editor_exerciseOverviewFields__ys46C,.editor_typeFieldsNested__6xngz{grid-template-columns:minmax(0,1fr)}.editor_itemTabs__CYZ47{align-items:flex-start;flex-direction:column}.editor_builderHeader__kM7lS{flex-direction:column;align-items:stretch}.editor_exerciseActions__LSXya{justify-content:flex-start}.editor_itemCommonGrid__RSFJz,.editor_typeFields__vLC2X{grid-template-columns:1fr}.editor_materialSaveBar__w3HC1{align-items:stretch;flex-direction:column}.editor_materialEditorTabs__fqAJJ{overflow-x:auto;background:linear-gradient(to right,var(--background-secondary),transparent) 0/24px 100% no-repeat local,linear-gradient(to left,var(--background-secondary),transparent) 100%/24px 100% no-repeat local,radial-gradient(farthest-side at 0 50%,color-mix(in srgb,var(--text-primary) 16%,transparent),transparent) 0/10px 100% no-repeat scroll,radial-gradient(farthest-side at 100% 50%,color-mix(in srgb,var(--text-primary) 16%,transparent),transparent) 100%/10px 100% no-repeat scroll,var(--background-secondary)}.editor_materialEditorTabs__fqAJJ button{flex:1 0 auto}}.editor_trainerBuilder__KKxxe{display:grid;gap:20px}.editor_trainerBuilderHeader__FJsd8{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}.editor_trainerBuilderHeader__FJsd8 h2{margin:0 0 6px;font-size:22px}.editor_trainerBuilderHeader__FJsd8 p{max-width:680px;margin:0;color:var(--text-secondary);line-height:1.55}.editor_trainerBuilderActions__OXwD8{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.editor_trainerPreview__nlSgK{display:grid;gap:14px;padding:20px;border:1px dashed var(--border-secondary);border-radius:12px;background:var(--background-secondary)}.editor_trainerPreview__nlSgK>header{display:grid;gap:4px}.editor_trainerPreview__nlSgK>header span{color:var(--color-accent-text);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.editor_trainerPreview__nlSgK>header p{margin:0;color:var(--text-tertiary);font-size:13px}.editor_trainerBuilderEmpty__nwVyf{display:grid;justify-items:start;gap:10px;padding:28px;border:1px dashed var(--border-primary);border-radius:12px;background:var(--background-secondary)}.editor_trainerBuilderEmpty__nwVyf p{max-width:620px;margin:0 0 6px;color:var(--text-secondary)}.editor_trainerBuilderWorkspace__r2Bxk{display:grid;grid-template-columns:minmax(220px,280px) minmax(0,1fr);gap:16px;align-items:start}.editor_trainerQuestionList__1LQeH{display:grid;gap:8px;max-height:720px;overflow-y:auto}.editor_trainerQuestionList__1LQeH>button{display:grid;grid-template-columns:32px minmax(0,1fr);gap:10px;width:100%;padding:12px;color:var(--text-primary);text-align:left;background:var(--background-primary);border:1px solid var(--border-primary);border-radius:10px;cursor:pointer;transition:border-color .15s ease,background-color .15s ease}.editor_trainerQuestionList__1LQeH>button:hover{border-color:var(--border-secondary);background:var(--background-secondary)}.editor_trainerQuestionList__1LQeH>button[aria-current=true]{border-color:var(--color-primary);background:color-mix(in srgb,var(--color-primary) 7%,var(--background-primary));box-shadow:inset 3px 0 0 var(--color-primary)}.editor_trainerQuestionList__1LQeH>button[aria-current=true]>span{color:var(--color-accent-text)}.editor_trainerQuestionList__1LQeH>button>span{color:var(--text-tertiary);font-size:12px;font-weight:800;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.editor_trainerQuestionList__1LQeH>button div{display:grid;gap:4px;min-width:0}.editor_trainerQuestionList__1LQeH>button small,.editor_trainerQuestionList__1LQeH>button strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.editor_trainerQuestionList__1LQeH>button small{color:var(--text-tertiary);font-size:12px}.editor_trainerQuestionList__1LQeH>button small.editor_trainerQuestionIssue__seozk{display:inline-flex;align-items:center;gap:4px;color:var(--color-warning-text)}.editor_trainerQuestionList__1LQeH>button small.editor_trainerQuestionIssue__seozk svg{flex-shrink:0}.editor_trainerQuestionEditor__n3CmT{display:grid;gap:16px;padding:20px;border:1px solid var(--border-primary);border-radius:12px;background:var(--background-primary)}.editor_trainerQuestionEditor__n3CmT textarea{min-height:92px}.editor_trainerOptionEditor__99Mxj{display:grid;gap:8px}.editor_trainerOptionRow__YsrXn{display:grid;grid-template-columns:var(--control-height-md) minmax(0,1fr) var(--control-height-md);gap:8px;align-items:center}.editor_trainerOptionRow__YsrXn>input{min-width:0}.editor_trainerOptionRow__YsrXn>button{display:grid;width:var(--control-height-md);height:var(--control-height-md);padding:0;place-items:center;color:var(--text-tertiary);background:var(--background-secondary);border:1px solid var(--border-primary);border-radius:var(--control-radius);cursor:pointer;transition:color .15s ease,border-color .15s ease,background-color .15s ease}.editor_trainerOptionRow__YsrXn>button:hover:not(:disabled){color:var(--error-text);border-color:var(--error-border);background:var(--error-background)}.editor_trainerOptionRow__YsrXn>button:disabled{cursor:not-allowed;opacity:.4}.editor_trainerOptionRow__YsrXn:has(input[type=radio]:checked)>input{border-color:var(--color-success);background:color-mix(in srgb,var(--color-success) 8%,var(--background-secondary))}.editor_trainerCorrectOption__bSX0v{display:grid;width:var(--control-height-md);height:var(--control-height-md);margin:0;place-items:center;background:var(--background-secondary);border:1px solid var(--border-primary);border-radius:var(--control-radius);cursor:pointer;transition:border-color .15s ease,background-color .15s ease}.editor_trainerCorrectOption__bSX0v:hover{border-color:var(--border-secondary)}.editor_trainerCorrectOption__bSX0v:has(input:checked){border-color:var(--color-success);background:color-mix(in srgb,var(--color-success) 12%,var(--background-secondary))}.editor_trainerCorrectOption__bSX0v input{width:17px;height:17px;margin:0;accent-color:var(--color-success);cursor:pointer}@media(max-width:480px){.editor_trainerBuilderHeader__FJsd8,.editor_trainerQuestionToolbar__65w5l{align-items:stretch;flex-direction:column}.editor_trainerBuilderWorkspace__r2Bxk{grid-template-columns:1fr}.editor_trainerQuestionList__1LQeH{grid-template-columns:repeat(2,minmax(0,1fr));max-height:240px}.editor_trainerQuestionEditor__n3CmT{padding:14px}}.PracticeQuestionCard_card__uwU9f [data-has-tooltip]{cursor:help;text-decoration:underline;text-decoration-style:dotted;text-decoration-color:color-mix(in srgb,var(--color-primary) 35%,transparent);text-decoration-thickness:1px;text-underline-offset:3px}.PracticeQuestionCard_card__uwU9f h2{margin:20px 0 10px;color:var(--text-primary);font-size:25px;line-height:1.3}.PracticeQuestionCard_topline__onTqH{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.PracticeQuestionCard_topline__onTqH>span{padding:5px 9px;color:var(--text-secondary);background:var(--background-secondary);border:1px solid var(--border-primary);border-radius:999px;font-size:12px;font-weight:800;line-height:1.3;text-transform:uppercase}.PracticeQuestionCard_context__LPsfw{margin:0 0 22px;color:var(--text-secondary);font-size:15px;line-height:1.55}.PracticeQuestionCard_promptCard__4S12y{margin:0 0 20px;padding:16px;background:color-mix(in srgb,var(--color-primary) 10%,var(--background-secondary));border:1px solid color-mix(in srgb,var(--color-primary) 34%,var(--border-primary));border-radius:8px}.PracticeQuestionCard_promptCard__4S12y span{display:block;margin-bottom:8px;color:var(--color-accent-text);font-size:12px;font-weight:800;letter-spacing:.04em;line-height:1.3;text-transform:uppercase}.PracticeQuestionCard_promptCard__4S12y p{margin:0;color:var(--text-primary);font-size:18px;font-weight:800;line-height:1.45}.PracticeQuestionCard_hintBox__KkP2C{margin-bottom:20px;padding:14px 16px;background:var(--background-secondary);border:1px solid var(--border-primary);border-left:4px solid var(--color-primary);border-radius:8px}.PracticeQuestionCard_hintBox__KkP2C summary{display:block;color:var(--color-accent-text);cursor:pointer;font-size:12px;font-weight:800;letter-spacing:.04em;text-transform:uppercase}.PracticeQuestionCard_hintBox__KkP2C p{margin:10px 0 0;color:var(--text-primary);font-size:14px;line-height:1.5}.PracticeQuestionCard_optionGrid__5_6D3{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.PracticeQuestionCard_optionButton__wirtM{width:100%;min-height:var(--control-height-lg);padding:12px 14px;color:var(--text-primary);background:var(--background-secondary);border:1px solid var(--border-primary);border-radius:var(--control-radius);cursor:pointer;font:inherit;font-size:var(--control-font-md);font-weight:var(--control-weight);line-height:1.4;text-align:left;transition:background-color .2s ease,border-color .2s ease,color .2s ease,opacity .2s ease,transform .2s ease}.PracticeQuestionCard_optionButton__wirtM:hover:not(:disabled){border-color:var(--color-primary);transform:translateY(-1px)}.PracticeQuestionCard_optionButton__wirtM:disabled{cursor:default}.PracticeQuestionCard_optionSelected__nOS_x{border-color:var(--color-primary);box-shadow:inset 3px 0 0 var(--color-primary)}.PracticeQuestionCard_optionCorrect__Vpl7f{border-color:var(--color-success);box-shadow:inset 3px 0 0 var(--color-success)}.PracticeQuestionCard_optionWrong__wIHNa{border-color:var(--color-error);box-shadow:inset 3px 0 0 var(--color-error)}.PracticeQuestionCard_typedArea__x0VlL{display:flex;flex-direction:column;align-items:flex-start;gap:10px}.PracticeQuestionCard_typedArea__x0VlL label{color:var(--text-primary);font-size:14px;font-weight:800}.PracticeQuestionCard_inlineExercise___GMgd{display:grid;gap:18px}.PracticeQuestionCard_inlineBank__s2U7h{display:flex;flex-wrap:wrap;gap:7px;padding:12px;border:1px solid var(--border-primary);border-radius:8px;background:var(--background-secondary)}.PracticeQuestionCard_inlineBank__s2U7h span{padding:5px 9px;border:1px solid var(--border-primary);border-radius:999px;background:var(--background-primary);color:var(--text-secondary);font-size:13px;font-weight:700}.PracticeQuestionCard_inlinePassage__Ezzr8{color:var(--text-primary);font-size:17px;line-height:2.3;white-space:pre-wrap}.PracticeQuestionCard_inlineBlank__mRCgf{display:inline-flex;align-items:center;gap:5px;margin:0 4px;white-space:nowrap}.PracticeQuestionCard_inlineBlank__mRCgf>span{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:999px;background:var(--color-primary);color:var(--color-on-accent);font-size:12px;font-weight:900}.PracticeQuestionCard_inlineBlank__mRCgf select{min-width:132px;min-height:38px;padding:0 30px 0 10px;border:1px solid var(--border-primary);border-radius:var(--control-radius);background:var(--background-primary);color:var(--text-primary);font:inherit;font-size:14px}.PracticeQuestionCard_inlineSelectCorrect__FMUcW{border-color:var(--color-success)!important}.PracticeQuestionCard_inlineSelectWrong__izCPX{border-color:var(--color-error)!important}.PracticeQuestionCard_typedInput__xKnRT{width:100%;min-width:0;min-height:var(--control-height-md);padding:var(--control-padding-md);border:1px solid var(--border-primary);border-radius:var(--control-radius);outline:none;background:var(--background-secondary);color:var(--text-primary);font-family:inherit;font-size:var(--control-font-md);line-height:1.2;transition:border-color .15s ease,box-shadow .15s ease}.PracticeQuestionCard_typedInput__xKnRT::placeholder{color:var(--text-tertiary)}.PracticeQuestionCard_typedInput__xKnRT:hover:not(:disabled):not(:focus){border-color:var(--border-secondary)}.PracticeQuestionCard_typedInput__xKnRT:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.PracticeQuestionCard_typedInput__xKnRT:disabled{background:var(--background-tertiary);color:var(--text-disabled);cursor:not-allowed}.PracticeQuestionCard_typedInput__xKnRT:-webkit-autofill{-webkit-text-fill-color:var(--text-primary);box-shadow:0 0 0 1000px var(--background-secondary) inset;caret-color:var(--text-primary)}.PracticeQuestionCard_typedInput__xKnRT:-webkit-autofill:focus{box-shadow:0 0 0 1000px var(--background-secondary) inset,0 0 0 2px color-mix(in srgb,var(--color-primary) 18%,transparent)}.PracticeQuestionCard_typedInput__xKnRT[aria-invalid=true]{border-color:var(--color-error)}.PracticeQuestionCard_typedInput__xKnRT[aria-invalid=true]:focus{box-shadow:0 0 0 2px color-mix(in srgb,var(--color-error) 22%,transparent)}.PracticeQuestionCard_typedInput__xKnRT{min-height:120px;resize:vertical;line-height:1.5}.PracticeQuestionCard_checkButton__dudMS{min-height:var(--control-height-lg);padding:0 18px;color:var(--text-primary);background:var(--background-secondary);border:1px solid var(--border-primary);border-radius:var(--control-radius);cursor:pointer;font:inherit;font-size:var(--control-font-md);font-weight:var(--control-weight)}.PracticeQuestionCard_checkButton__dudMS:disabled{cursor:default;opacity:.6}.PracticeQuestionCard_feedbackCorrect__J_K3V,.PracticeQuestionCard_feedbackWrong__bipzO{margin-top:20px;padding:16px;background:var(--background-secondary);border:1px solid var(--border-primary);border-radius:8px}.PracticeQuestionCard_feedbackCorrect__J_K3V h3,.PracticeQuestionCard_feedbackWrong__bipzO h3{margin:0 0 6px;color:var(--text-primary);font-size:18px}.PracticeQuestionCard_feedbackCorrect__J_K3V p,.PracticeQuestionCard_feedbackWrong__bipzO p{margin:0;color:var(--text-secondary);line-height:1.55}.PracticeQuestionCard_feedbackCorrect__J_K3V{border-left:4px solid var(--color-success)}.PracticeQuestionCard_feedbackWrong__bipzO{border-left:4px solid var(--color-error)}.PracticeQuestionCard_correctAnswer__2bKOA{margin-top:10px!important;color:var(--text-primary)!important;font-weight:800}.PracticeQuestionCard_placeholder__EofS9{color:var(--text-tertiary);font-style:italic}.PracticeQuestionCard_noOptions__T_7uc{margin:0;padding:12px 14px;color:var(--color-warning-text);background:var(--color-warning-bg);border:1px solid var(--color-warning);border-radius:8px;font-size:14px}@media(max-width:640px){.PracticeQuestionCard_inlinePassage__Ezzr8{font-size:15px;line-height:2.5}.PracticeQuestionCard_inlineBlank__mRCgf{margin:2px 1px}.PracticeQuestionCard_inlineBlank__mRCgf select{min-width:112px;max-width:180px}}.textbookReader_shell__iL099{overflow:hidden;border:1px solid var(--border-primary);border-radius:16px;background:var(--background-primary);box-shadow:0 18px 50px rgba(15,23,42,.08)}.textbookReader_footer__WNlxC,.textbookReader_toolbar__TH_u6{display:flex;align-items:center;gap:12px;min-height:58px;padding:9px 14px;background:var(--background-primary)}.textbookReader_toolbar__TH_u6{border-bottom:1px solid var(--border-primary)}.textbookReader_footer__WNlxC button,.textbookReader_modeSwitch__Hg_q6 button,.textbookReader_search__dYUDR button,.textbookReader_sidebar__nqZoI button,.textbookReader_toolbar__TH_u6 button{border:1px solid var(--border-primary);border-radius:8px;background:var(--background-secondary);color:var(--text-primary);font:inherit;cursor:pointer}.textbookReader_search__dYUDR{display:flex;flex:1 1;max-width:420px}.textbookReader_bookmarkForm__zoX2E input,.textbookReader_pager__4Pq_V input,.textbookReader_search__dYUDR input{min-width:0;border:1px solid var(--border-primary);background:var(--background-secondary);color:var(--text-primary);font:inherit}.textbookReader_search__dYUDR input{flex:1 1;border-radius:8px 0 0 8px;padding:9px 11px}.textbookReader_search__dYUDR button{border-radius:0 8px 8px 0;padding:0 12px}.textbookReader_mobileTools__jJG8P,.textbookReader_modeSwitch__Hg_q6,.textbookReader_toolbarActions__rdV2m{display:flex;gap:6px}.textbookReader_mobileTools__jJG8P button,.textbookReader_modeSwitch__Hg_q6 button,.textbookReader_toolbarActions__rdV2m button{padding:8px 11px}.textbookReader_modeSwitch__Hg_q6 .textbookReader_active__WxJ5q{border-color:var(--color-primary);background:var(--color-primary);color:var(--color-on-accent)}.textbookReader_toolbarActions__rdV2m{margin-left:auto}.textbookReader_mobileTools__jJG8P{display:none}.textbookReader_progressLine__4qRG7{height:3px;background:var(--background-tertiary)}.textbookReader_ownerSettings__Spfp6{display:flex;flex-wrap:wrap;align-items:center;gap:14px;padding:12px 16px;border-bottom:1px solid var(--border-primary);background:var(--background-secondary)}.textbookReader_ownerSettings__Spfp6 label{display:flex;align-items:center;gap:7px;color:var(--text-secondary);font-size:14px}.textbookReader_ownerSettings__Spfp6 button{min-height:34px;padding:0 12px;border:0;border-radius:8px;background:var(--color-primary);color:var(--color-on-accent);font:inherit;font-weight:700;cursor:pointer}.textbookReader_progressLine__4qRG7 span{display:block;height:100%;background:var(--color-primary);transition:width .18s ease}.textbookReader_readerGrid__kDK89{display:grid;grid-template-columns:230px minmax(0,1fr) 230px;min-height:70vh}.textbookReader_sidebar__nqZoI{overflow-y:auto;max-height:75vh;padding:16px;border-right:1px solid var(--border-primary);background:var(--background-secondary)}.textbookReader_bookmarkSidebar__upEnJ{border-right:0;border-left:1px solid var(--border-primary)}.textbookReader_sideHeader__bUj31{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.textbookReader_sideHeader__bUj31>button{display:none;width:var(--control-height-md);height:var(--control-height-md)}.textbookReader_toc__dlOzS{display:grid;gap:4px}.textbookReader_bookmarks__LFEnQ button,.textbookReader_toc__dlOzS button{display:flex;width:100%;justify-content:space-between;gap:8px;padding:9px;border-color:rgba(0,0,0,0);text-align:left}.textbookReader_bookmarks__LFEnQ span,.textbookReader_toc__dlOzS span{overflow:hidden;text-overflow:ellipsis}.textbookReader_bookmarks__LFEnQ small,.textbookReader_toc__dlOzS small{color:var(--text-tertiary)}.textbookReader_stage__drsIc{overflow:auto;display:grid;min-width:0;max-height:75vh;place-items:start center;padding:28px;background:var(--background-tertiary)}.textbookReader_continuousPage__se9UG,.textbookReader_singlePage__92RJC{position:relative;overflow:hidden;background:#fff;box-shadow:0 7px 30px rgba(15,23,42,.18)}.textbookReader_singlePage__92RJC{max-width:none;min-width:320px;transition:width .16s ease}.textbookReader_continuousPage__se9UG img,.textbookReader_singlePage__92RJC img{position:absolute;z-index:2;inset:0;display:block;width:100%;height:100%;object-fit:contain}.textbookReader_continuousPages__ZEV3_{display:grid;width:min(100%,1000px);gap:24px}.textbookReader_continuousPage__se9UG{width:100%;scroll-margin:24px}.textbookReader_pageNumber__69BqS{position:absolute;z-index:3;top:10px;left:10px;min-width:30px;padding:5px 8px;border-radius:999px;background:rgba(15,23,42,.72);color:#fff;font-size:12px;text-align:center}.textbookReader_pageSkeleton__t7tnz{position:absolute;z-index:1;inset:0;overflow:hidden;background:var(--background-secondary)}.textbookReader_pageSkeleton__t7tnz:after{position:absolute;inset:0;background:linear-gradient(100deg,transparent 20%,rgba(148,163,184,.22) 50%,transparent 80%);content:"";transform:translateX(-100%);animation:textbookReader_page-shimmer__1VdIA 1.25s infinite}@keyframes textbookReader_page-shimmer__1VdIA{to{transform:translateX(100%)}}.textbookReader_pageFailure__CDZJP{position:absolute;z-index:4;inset:0;display:grid;place-content:center;justify-items:center;padding:24px;background:var(--background-primary);color:var(--error-text);text-align:center}.textbookReader_pageFailure__CDZJP button{min-height:38px;padding:0 14px;border:0;border-radius:8px;background:var(--color-primary);color:var(--color-on-accent);font:inherit;font-weight:700;cursor:pointer}.textbookReader_legacyReader__rC0Iv{position:relative;width:100%;min-height:75vh}.textbookReader_continuous__8h1Mn{width:100%;height:75vh;border:0;background:#fff}.textbookReader_loading__gPM5p,.textbookReader_processing__52Ho2{display:grid;min-height:420px;place-content:center;justify-items:center;padding:32px;text-align:center}.textbookReader_processing__52Ho2{border:1px solid var(--border-primary);border-radius:16px;background:var(--background-primary)}.textbookReader_processing__52Ho2 h2,.textbookReader_processing__52Ho2 p{margin:8px 0 0}.textbookReader_muted__bm2i6,.textbookReader_processing__52Ho2 p{color:var(--text-tertiary)}.textbookReader_retry__LJ0Cc{margin-top:18px;min-height:40px;padding:0 16px;border:0;border-radius:8px;background:var(--color-primary);color:var(--color-on-accent);font:inherit;font-weight:700;cursor:pointer}.textbookReader_spinner__ZDy2c{width:38px;height:38px;border:4px solid var(--border-primary);border-top-color:var(--color-primary);border-radius:50%;animation:textbookReader_spin__Vnmqv .9s linear infinite}@keyframes textbookReader_spin__Vnmqv{to{transform:rotate(1turn)}}.textbookReader_webContent__9l7sH{width:min(780px,100%);min-height:100%;padding:44px 54px;background:var(--background-primary);color:var(--text-primary);line-height:1.7;box-shadow:0 7px 30px rgba(15,23,42,.12)}.textbookReader_webContent__9l7sH img,.textbookReader_webContent__9l7sH table{max-width:100%}.textbookReader_bookmarkForm__zoX2E{display:grid;gap:7px;margin-bottom:14px}.textbookReader_bookmarkForm__zoX2E button,.textbookReader_bookmarkForm__zoX2E input{padding:9px;border-radius:8px}.textbookReader_bookmarks__LFEnQ{display:grid;gap:6px}.textbookReader_bookmarks__LFEnQ>div{position:relative;display:grid;grid-template-columns:1fr auto}.textbookReader_bookmarks__LFEnQ .textbookReader_remove__KcjvP{width:30px;padding:0;color:var(--error-text)}.textbookReader_footer__WNlxC{justify-content:space-between;border-top:1px solid var(--border-primary)}.textbookReader_pager__4Pq_V,.textbookReader_zoom__1CjM_{display:flex;align-items:center;gap:8px}.textbookReader_pager__4Pq_V button,.textbookReader_zoom__1CjM_ button{min-width:var(--control-height-md);height:var(--control-height-md)}.textbookReader_pager__4Pq_V label{display:flex;align-items:center;gap:7px;color:var(--text-secondary);font-size:14px}.textbookReader_pager__4Pq_V input{width:58px;padding:7px;border-radius:7px}.textbookReader_complete__6ZAun,.textbookReader_completed__BwDvi{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:var(--control-height-md);padding:0 14px;font-weight:700!important}.textbookReader_complete__6ZAun{border-color:var(--color-primary)!important;background:var(--color-primary)!important;color:var(--color-on-accent)!important}.textbookReader_completed__BwDvi{border-color:var(--color-success)!important;color:var(--color-success-text)!important}.textbookReader_error__nJFhM{width:min(700px,100%);margin-bottom:14px;padding:11px 13px;border-radius:8px;background:var(--color-error-bg);color:var(--error-text)}@media(max-width:1000px){.textbookReader_readerGrid__kDK89{grid-template-columns:minmax(0,1fr)}.textbookReader_sidebar__nqZoI{position:fixed;z-index:var(--z-modal);inset:auto 0 0;display:none;max-height:75vh;border:1px solid var(--border-primary);border-radius:18px 18px 0 0;box-shadow:0 -18px 50px rgba(15,23,42,.2)}.textbookReader_sidebar__nqZoI.textbookReader_mobileOpen__k38cy{display:block}.textbookReader_mobileTools__jJG8P,.textbookReader_sideHeader__bUj31>button{display:flex}.textbookReader_toolbar__TH_u6{flex-wrap:wrap}.textbookReader_search__dYUDR{order:3;width:100%;max-width:none}.textbookReader_toolbarActions__rdV2m{margin-left:0}}@media(max-width:640px){.textbookReader_shell__iL099{border-right:0;border-left:0;border-radius:0}.textbookReader_modeSwitch__Hg_q6,.textbookReader_toolbarActions__rdV2m button:last-child,.textbookReader_zoom__1CjM_{display:none}.textbookReader_stage__drsIc{max-height:68vh;padding:14px}.textbookReader_singlePage__92RJC{min-width:260px}.textbookReader_continuousPages__ZEV3_{gap:14px}.textbookReader_webContent__9l7sH{padding:26px 20px}.textbookReader_footer__WNlxC{flex-wrap:wrap}.textbookReader_pager__4Pq_V{order:1;width:100%;justify-content:center}.textbookReader_complete__6ZAun,.textbookReader_completed__BwDvi{order:2;width:100%}}