._wrapper_oqk7d_1{place-content:center;justify-items:center;gap:var(--space-3);min-height:100dvh;color:var(--color-muted);display:grid}._page_1k6x4_1{min-height:100dvh;padding:max(var(--space-4), env(safe-area-inset-top)) var(--space-4) max(var(--space-4), env(safe-area-inset-bottom));place-items:center;display:grid}._stack_1k6x4_9{width:100%;max-width:24rem}._legal_1k6x4_10{flex-wrap:wrap;justify-content:center;gap:1rem;padding:1rem .5rem 0;font-size:.8125rem;display:flex}._legal_1k6x4_10 a{color:var(--color-muted)}._card_1k6x4_13{gap:var(--space-4);width:100%;max-width:24rem;padding:var(--space-6) var(--space-5);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);display:grid}._brand_1k6x4_24{margin:0 0 calc(var(--space-4) * -1);letter-spacing:.04em;text-transform:uppercase;color:var(--color-muted);font-size:.8125rem;font-weight:600}._title_1k6x4_33{font-size:var(--font-size-xl);margin:0;line-height:1.2}._subtitle_1k6x4_39{margin:calc(var(--space-3) * -1) 0 var(--space-2);color:var(--color-muted)}._field_1k6x4_44{gap:var(--space-2);font-weight:600;display:grid}._field_1k6x4_44 input{min-height:var(--touch-target);padding:0 var(--space-3);font:inherit;color:var(--color-text);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);font-weight:400}._field_1k6x4_44 input[aria-invalid=true]{border-color:var(--color-error)}._error_1k6x4_66{padding:var(--space-3);color:var(--color-text);background:var(--color-error-soft);border-left:4px solid var(--color-error);border-radius:var(--radius-sm);margin:0}._error_1k6x4_66:before{content:"⚠ "}._submit_1k6x4_79{min-height:var(--touch-target);font:inherit;color:var(--color-on-accent);background:var(--color-accent);border-radius:var(--radius-md);cursor:pointer;border:0;font-weight:700}._submit_1k6x4_79:disabled{opacity:.55;cursor:not-allowed}._hint_1k6x4_96{margin:calc(var(--space-1) * -1) 0 0;color:var(--color-muted);font-size:.8125rem;font-weight:400}._switch_1k6x4_104{text-align:center;color:var(--color-muted);margin:0;font-size:.875rem}._switch_1k6x4_104 a{color:var(--color-accent);font-weight:600}._page_3cf1b_1{width:100%;height:100dvh;max-width:var(--feed-max-width);padding:env(safe-area-inset-top) env(safe-area-inset-right) 0 env(safe-area-inset-left);grid-template-rows:auto minmax(0,1fr) auto;grid-template-columns:minmax(0,1fr);margin:0 auto;display:grid}._topbar_3cf1b_12{z-index:10;align-items:center;gap:var(--space-2);min-height:4rem;padding:var(--space-2) var(--space-3);grid-template-columns:minmax(0,1fr) minmax(0,auto) minmax(2.75rem,1fr);display:grid;position:relative}._brand_3cf1b_23{align-items:center;gap:var(--space-2);width:fit-content;min-width:0;color:var(--color-text);text-decoration:none;display:inline-flex}._brandMark_3cf1b_33{border-radius:.6rem;flex:none;width:2.25rem;height:2.25rem}._brandWords_3cf1b_40{min-width:0;line-height:1.05;display:grid}._brandApp_3cf1b_42{font-family:var(--font-heading);letter-spacing:-.02em;font-size:1.25rem;font-weight:700}._brandParent_3cf1b_49{letter-spacing:.025em;white-space:nowrap;color:var(--color-muted);margin-top:.15rem;font-size:.625rem;font-weight:650}._center_3cf1b_58{justify-content:center;align-items:center;gap:var(--space-2);min-width:0;display:flex}._profile_3cf1b_66{justify-self:end;position:relative}._profileButton_3cf1b_68{min-width:var(--touch-target);min-height:var(--touch-target);border:1px solid var(--color-border);border-radius:var(--radius-pill);background:var(--color-surface);color:var(--color-muted);cursor:pointer;justify-content:center;align-items:center;gap:.2rem;padding:.2rem;display:inline-flex}._profileButton_3cf1b_68:hover,._profileButton_3cf1b_68[aria-expanded=true]{border-color:var(--color-accent-strong);color:var(--color-text)}._avatar_3cf1b_86{background:var(--color-accent-soft);width:2rem;height:2rem;color:var(--color-accent-strong);border-radius:50%;place-items:center;font-size:.9rem;font-weight:750;display:grid}._profileChevron_3cf1b_98{width:.9rem;height:.9rem;margin-right:.2rem}._profileMenu_3cf1b_100{width:min(16rem,100vw - 1.5rem);padding:var(--space-2);border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);display:grid;position:absolute;top:calc(100% + .5rem);right:0;box-shadow:0 18px 36px #00000059}._profileMenu_3cf1b_100[hidden]{display:none}._profileIdentity_3cf1b_115{padding:var(--space-2) var(--space-3) var(--space-3);border-bottom:1px solid var(--color-border);margin-bottom:var(--space-1);gap:.15rem;display:grid}._identityLabel_3cf1b_123{color:var(--color-muted);font-size:.72rem}._identityName_3cf1b_124{text-overflow:ellipsis;white-space:nowrap;font-size:.95rem;overflow:hidden}._menuItem_3cf1b_126{min-height:var(--touch-target);width:100%;padding:0 var(--space-3);border-radius:var(--radius-md);color:var(--color-text);font:inherit;font-size:var(--font-size-sm);text-align:left;cursor:pointer;background:0 0;border:0;align-items:center;text-decoration:none;display:flex}._menuItem_3cf1b_126:hover{background:var(--color-surface-raised)}._installHelp_3cf1b_144{margin:0 var(--space-2) var(--space-2);padding:var(--space-2);border-radius:var(--radius-md);background:var(--color-surface-raised);color:var(--color-muted);font-size:.75rem;line-height:1.45}._logout_3cf1b_153{color:var(--color-muted);border-top:1px solid var(--color-border);border-radius:0}._main_3cf1b_155{flex-direction:column;min-height:0;display:flex}._main_3cf1b_155>*{flex:1}._scrollable_3cf1b_158{overscroll-behavior:contain;overflow-y:auto}._scrollable_3cf1b_158>*{flex:none}._nav_3cf1b_161{padding:var(--space-1) var(--space-2) calc(var(--space-1) + env(safe-area-inset-bottom));background:var(--color-bg);border-top:1px solid var(--color-border);grid-template-columns:repeat(3,1fr);display:grid}._navLink_3cf1b_169{min-height:var(--touch-target);padding:var(--space-1) 0;color:var(--color-muted);border-radius:var(--radius-md);align-content:center;justify-items:center;gap:2px;font-size:.75rem;font-weight:600;text-decoration:none;display:grid}._navLink_3cf1b_169:hover{color:var(--color-text)}._active_3cf1b_184{color:var(--color-accent-strong)}._active_3cf1b_184 span{box-shadow:inset 0 -2px}@media (width<=30rem){._topbar_3cf1b_12{grid-template-columns:minmax(0,1fr) minmax(0,auto) auto}._brandMark_3cf1b_33{width:2rem;height:2rem}._brand_3cf1b_23{gap:var(--space-1)}._brandApp_3cf1b_42{font-size:1.1rem}._brandParent_3cf1b_49{font-size:.55rem}._center_3cf1b_58{gap:var(--space-1)}}._modeChip_8r5y0_2{text-overflow:ellipsis;white-space:nowrap;min-width:0;max-width:100%;padding:var(--space-1) var(--space-3);font-size:var(--font-size-sm);background:var(--color-surface-raised);border:1px solid var(--color-border);border-radius:var(--radius-pill);font-weight:600;overflow:hidden}._modeLink_8r5y0_16{font-size:var(--font-size-sm);color:var(--color-accent-strong);flex:none}@media (width<=30rem){._modeLink_8r5y0_16{display:none}}._frameWrap_1mnb3_2{border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface-raised);flex:1;min-height:0;display:flex;position:relative;overflow:hidden}._frame_1mnb3_2{border:0;flex:1;width:100%;min-height:0;display:block}._loading_1mnb3_21{place-content:center;justify-items:center;gap:var(--space-3);color:var(--color-muted);background:var(--color-surface-raised);display:grid;position:absolute;inset:0}._empty_1n7zt_1{min-height:0}._panel_1n7zt_5{gap:var(--space-1);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);border:1.5px solid;animation:.16s ease-out _appear_1n7zt_1;display:grid}._correct_1n7zt_15{border-color:var(--color-success);background:var(--color-success-soft)}._incorrect_1n7zt_20{border-color:var(--color-error);background:var(--color-error-soft)}._retry_1n7zt_26{border-color:var(--color-hint);background:var(--color-hint-soft)}._title_1n7zt_31{align-items:center;gap:var(--space-2);margin:0;font-weight:650;display:flex}._correct_1n7zt_15 ._title_1n7zt_31{color:var(--color-success)}._incorrect_1n7zt_20 ._title_1n7zt_31{color:var(--color-error)}._retry_1n7zt_26 ._title_1n7zt_31{color:var(--color-hint)}._text_1n7zt_51,._explanation_1n7zt_52{color:var(--color-text);margin:0}._explanation_1n7zt_52{color:var(--color-muted);font-size:.9375rem}@keyframes _appear_1n7zt_1{0%{opacity:0;transform:translateY(4px)}}._exercise_1gbmq_6{gap:var(--space-4);display:grid}._prompt_1gbmq_11{margin:0;font-size:1.375rem;font-weight:600;line-height:1.35}._instruction_1gbmq_18{margin:calc(-1 * var(--space-2)) 0 0;color:var(--color-muted);font-size:var(--font-size-sm)}._options_1gbmq_24{gap:var(--space-2);margin:0;padding:0;list-style:none;display:grid}._option_1gbmq_24{width:100%;min-height:var(--option-height);align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-4);font:inherit;text-align:left;color:var(--color-text);background:var(--color-surface-raised);border:1.5px solid var(--color-border);cursor:pointer;border-radius:.625rem;transition:transform 80ms ease-out,border-color .12s ease-out,background-color .12s ease-out;display:flex}._option_1gbmq_24:hover:not(:disabled){border-color:var(--color-accent)}._option_1gbmq_24:active:not(:disabled){transform:scale(.985)}._option_1gbmq_24:disabled{cursor:default}._optionLabel_1gbmq_65{flex:1}._marker_1gbmq_70{border:2px solid var(--color-border);border-radius:50%;flex:none;place-items:center;width:1.5rem;height:1.5rem;display:grid}._markerSquare_1gbmq_80{border-radius:.375rem}._selected_1gbmq_84{background:var(--color-accent-soft);border:2px solid var(--color-accent)}._selected_1gbmq_84 ._marker_1gbmq_70{border-color:var(--color-accent);background:var(--color-accent);color:var(--color-on-accent)}._correct_1gbmq_95{background:var(--color-success-soft);border:2px solid var(--color-success)}._correct_1gbmq_95 ._marker_1gbmq_70{border-color:var(--color-success);background:var(--color-success);color:var(--color-bg)}._incorrect_1gbmq_106{background:var(--color-error-soft);border:2px solid var(--color-error)}._incorrect_1gbmq_106 ._marker_1gbmq_70{border-color:var(--color-error);background:var(--color-error);color:var(--color-bg)}._dimmed_1gbmq_117{opacity:.6}._submit_1gbmq_122{min-height:var(--touch-target);padding:0 var(--space-5);font:inherit;color:var(--color-on-accent);background:var(--color-accent);border-radius:var(--radius-pill);cursor:pointer;border:none;justify-self:start;font-weight:600}._submit_1gbmq_122:disabled{opacity:.45;cursor:not-allowed}._binary_1gbmq_142{gap:var(--space-2);grid-template-columns:1fr 1fr;display:grid}._binary_1gbmq_142 ._option_1gbmq_24{justify-content:center;font-weight:600}._numericForm_1gbmq_155{gap:var(--space-3);display:grid}._numericRow_1gbmq_160{align-items:stretch;gap:var(--space-2);display:flex}._numericInput_1gbmq_166{min-width:0;min-height:var(--option-height);padding:0 var(--space-4);font-family:var(--font-mono);color:var(--color-text);background:var(--color-surface-raised);border:1.5px solid var(--color-border);border-radius:.625rem;flex:1;font-size:1.25rem}._numericInput_1gbmq_166:focus{border-color:var(--color-accent)}._unit_1gbmq_183{padding:0 var(--space-3);font-family:var(--font-mono);color:var(--color-muted);place-items:center;display:grid}._fieldHint_1gbmq_191{color:var(--color-hint);font-size:var(--font-size-sm);margin:0}._pairList_1gbmq_199{gap:var(--space-2);margin:0;padding:0;list-style:none;display:grid}._slot_1gbmq_207{margin-top:var(--space-1);font-size:var(--font-size-sm);color:var(--color-muted);display:block}._slotFilled_1gbmq_214{color:var(--color-accent-strong);font-weight:600}._chips_1gbmq_219{gap:var(--space-2);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}._chip_1gbmq_219{min-height:var(--touch-target);padding:0 var(--space-4);font:inherit;color:var(--color-text);background:var(--color-surface-raised);border:1.5px solid var(--color-border);border-radius:var(--radius-pill);cursor:pointer;touch-action:none}._chip_1gbmq_219:disabled{cursor:default}._chipUsed_1gbmq_245{opacity:.55}._zones_1gbmq_249{gap:var(--space-2);display:grid}._zone_1gbmq_249{gap:var(--space-2);min-height:4.5rem;padding:var(--space-3);text-align:left;font:inherit;color:var(--color-text);border:1.5px dashed var(--color-border);border-radius:var(--radius-md);cursor:pointer;background:0 0;display:grid}._zoneActive_1gbmq_268{border-color:var(--color-accent);background:var(--color-accent-soft)}._zoneTitle_1gbmq_273{font-weight:600;font-size:var(--font-size-sm);color:var(--color-muted)}._ghost_1gbmq_279{z-index:50;pointer-events:none;box-shadow:var(--shadow-card);position:fixed;transform:translate(-50%,-50%)}._orderItem_1gbmq_289{align-items:center;gap:var(--space-2);min-height:var(--option-height);padding:var(--space-1) var(--space-2);background:var(--color-surface-raised);border:1.5px solid var(--color-border);border-radius:.625rem;display:flex}._orderItemDragging_1gbmq_300{border-color:var(--color-accent);box-shadow:var(--shadow-card)}._orderIndex_1gbmq_305{text-align:center;width:1.75rem;font-family:var(--font-mono);color:var(--color-muted);flex:none}._handle_1gbmq_313,._moveButton_1gbmq_314{width:var(--touch-target);height:var(--touch-target);color:var(--color-muted);border-radius:var(--radius-sm);cursor:pointer;background:0 0;border:none;flex:none;place-items:center;padding:0;display:grid}._handle_1gbmq_313{cursor:grab;touch-action:none}._moveButton_1gbmq_314:disabled{opacity:.3;cursor:default}._hotspotStage_1gbmq_340{border-radius:var(--radius-md);cursor:crosshair;touch-action:manipulation;justify-self:center;width:100%;max-width:24rem;position:relative;overflow:hidden}._hotspotStage_1gbmq_340 img{-webkit-user-select:none;user-select:none;-webkit-user-drag:none;width:100%;height:auto;display:block}._hotspotMarker_1gbmq_359,._hotspotCursor_1gbmq_360,._hotspotSolution_1gbmq_361{pointer-events:none;border-radius:50%;position:absolute;transform:translate(-50%,-50%)}._hotspotMarker_1gbmq_359{border:3px solid var(--color-accent);background:var(--color-accent-soft);width:1.5rem;height:1.5rem}._hotspotMarker_1gbmq_359._correct_1gbmq_95{border-color:var(--color-success)}._hotspotMarker_1gbmq_359._incorrect_1gbmq_106{border-color:var(--color-error)}._hotspotCursor_1gbmq_360{border:2px dashed var(--color-focus);width:1.75rem;height:1.75rem;display:none}._hotspotStage_1gbmq_340:focus-visible ._hotspotCursor_1gbmq_360{display:block}._hotspotSolution_1gbmq_361{border:3px solid var(--color-success)}._card_19ie7_5{--topic-color:var(--topic-fallback);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);min-height:0;box-shadow:var(--shadow-card);grid-template-rows:auto minmax(0,1fr) auto;animation:.24s cubic-bezier(.2,.8,.2,1) _slide-in_19ie7_1;display:grid;overflow:hidden}._card_19ie7_5:focus{outline:none}._card_19ie7_5:focus-visible{outline:3px solid var(--color-focus);outline-offset:2px}._header_19ie7_31{justify-content:space-between;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);display:flex}._tags_19ie7_40{align-items:center;gap:var(--space-2);min-width:0;display:flex}._badge_19ie7_47{letter-spacing:.05em;text-transform:uppercase;height:1.625rem;color:var(--topic-color);background:color-mix(in srgb, var(--topic-color) 15%, transparent);border:1px solid var(--topic-color);border-radius:var(--radius-pill);flex:none;align-items:center;padding:0 .625rem;font-size:.6875rem;font-weight:700;display:inline-flex}._subtopic_19ie7_63{text-overflow:ellipsis;white-space:nowrap;font-size:var(--font-size-sm);color:var(--color-muted);overflow:hidden}._meta_19ie7_71{align-items:center;gap:var(--space-3);font-size:var(--font-size-sm);color:var(--color-muted);flex:none;display:flex}._dots_19ie7_80{gap:3px;display:inline-flex}._dot_19ie7_80,._dotOn_19ie7_86{background:var(--color-border);border-radius:3px;width:6px;height:6px}._dotOn_19ie7_86{background:var(--color-accent)}._duration_19ie7_97{align-items:center;gap:var(--space-1);font-family:var(--font-mono);font-size:.75rem;display:inline-flex}._body_19ie7_107{overscroll-behavior:contain;gap:var(--space-3);min-height:0;padding:var(--space-4);flex-direction:column;display:flex;overflow-y:auto}._title_19ie7_118{font-size:var(--font-size-sm);letter-spacing:.02em;color:var(--color-muted);margin:0;font-weight:600}._errorNotice_19ie7_126{gap:var(--space-3);padding:var(--space-4);color:var(--color-text);background:var(--color-hint-soft);border:1.5px solid var(--color-hint);border-radius:var(--radius-md);display:flex}._errorNotice_19ie7_126 svg{color:var(--color-hint);flex:none}._errorNotice_19ie7_126 p{margin:0}._errorTitle_19ie7_145{font-weight:650}._actions_19ie7_151{align-items:stretch;gap:var(--space-2);padding:var(--space-2) var(--space-4) var(--space-3);border-top:1px solid var(--color-border);flex-direction:column;display:flex}._swipeHint_19ie7_160{justify-content:center;align-items:center;gap:var(--space-1);color:var(--color-muted);margin:0;font-size:.75rem;line-height:1.2;display:flex}._actionRow_19ie7_171{justify-content:flex-end;align-items:center;gap:var(--space-2);display:flex}._resultNote_19ie7_178{align-items:center;gap:var(--space-2);color:var(--color-success);margin:0;font-weight:600;display:inline-flex}._next_19ie7_188{align-items:center;gap:var(--space-2);min-height:var(--touch-target);padding:0 var(--space-5);font:inherit;color:var(--color-text);background:var(--color-surface-raised);border:1px solid var(--color-border);border-radius:var(--radius-pill);cursor:pointer;font-weight:600;transition:background-color .16s ease-out,color .16s ease-out;display:inline-flex}._skip_19ie7_206{min-height:var(--touch-target);padding:0 var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-pill);background:var(--color-surface-raised);color:var(--color-text);font:inherit;font-size:var(--font-size-sm);cursor:pointer;font-weight:600}._skip_19ie7_206:hover{border-color:var(--color-accent-strong)}._nextPrimary_19ie7_221{color:var(--color-on-accent);background:var(--color-accent);border-color:var(--color-accent)}@keyframes _slide-in_19ie7_1{0%{opacity:0;transform:translateY(12%)}}._viewport_1079d_1{min-height:0;padding:0 var(--space-2) var(--space-2);flex-direction:column;display:flex;position:relative}._viewport_1079d_1>article,._viewport_1079d_1>._status_1079d_11{flex:1;min-height:0}._offline_1079d_16{margin:0 0 var(--space-2);align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);font-size:var(--font-size-sm);color:var(--color-text);background:var(--color-hint-soft);border:1px solid var(--color-hint);border-radius:var(--radius-md);display:flex}._status_1079d_11{place-content:center;justify-items:center;gap:var(--space-2);padding:var(--space-6) var(--space-4);text-align:center;color:var(--color-muted);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);display:grid}._status_1079d_11 p{margin:0}._statusTitle_1079d_46{color:var(--color-text);font-weight:650}._retry_1079d_51{margin-top:var(--space-3);min-height:var(--touch-target);padding:0 var(--space-5);font:inherit;color:var(--color-on-accent);background:var(--color-accent);border-radius:var(--radius-pill);cursor:pointer;border:none;align-items:center;font-weight:600;text-decoration:none;display:inline-flex}@media (width>=40rem){._viewport_1079d_1{padding:0 0 var(--space-4)}}._status_66u3c_1{justify-items:center;gap:var(--space-3);padding:var(--space-6) var(--space-4);text-align:center;color:var(--color-muted);display:grid}._status_66u3c_1 p{margin:0}._title_66u3c_14{color:var(--color-text);font-weight:650}._retry_66u3c_19{min-height:var(--touch-target);padding:0 var(--space-5);font:inherit;color:var(--color-on-accent);background:var(--color-accent);border-radius:var(--radius-pill);cursor:pointer;border:none;font-weight:600}._content_foome_1{gap:var(--space-4);padding:var(--space-2) var(--space-3) var(--space-5);display:grid}._headerTitle_foome_7{font-size:var(--font-size-sm);color:var(--color-muted);font-weight:600}._intro_foome_13{gap:var(--space-1);display:grid}._title_foome_18{font-size:var(--font-size-xl);margin:0}._lead_foome_23{color:var(--color-muted);margin:0}._list_foome_28{gap:var(--space-3);margin:0;padding:0;list-style:none;display:grid}._card_foome_36{--topic-color:var(--topic-fallback);gap:var(--space-3);padding:var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-left:4px solid 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