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(prefers-reduced-motion:reduce){._spinner_gnvmx_1{animation:none}}._group_13x06_1{gap:var(--space-1);border:none;flex-direction:column;min-width:0;margin:0;padding:0;display:flex}._legend_13x06_11{margin-bottom:var(--space-2);font-family:var(--font-display);font-size:var(--text-body-sm);color:var(--text-primary);padding:0;font-weight:600}._option_13x06_20{align-items:center;gap:var(--space-3);cursor:pointer;min-height:44px;display:flex}._option_13x06_20:has(._radio_13x06_28:disabled){opacity:.55;cursor:default}._radio_13x06_28{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}._ring_13x06_42{border:1.5px solid var(--border-medium);border-radius:var(--radius-pill);background:var(--surface-card);width:22px;height:22px;transition:border-color var(--duration-fast) var(--ease-gentle);flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}._ring_13x06_42:after{content:"";border-radius:var(--radius-pill);background:var(--color-secondary);width:11px;height:11px;transition:transform var(--duration-fast) var(--ease-settle);transform:scale(0)}:is(._option_13x06_20:hover:not(:has(._radio_13x06_28:disabled)) ._ring_13x06_42,._radio_13x06_28:checked+._ring_13x06_42){border-color:var(--color-secondary)}._radio_13x06_28:checked+._ring_13x06_42:after{transform:scale(1)}._radio_13x06_28:focus-visible+._ring_13x06_42{outline:3px solid var(--color-secondary-tint);outline-offset:2px}._label_13x06_79{color:var(--text-primary);line-height:1.35}._group_24q4n_1{gap:var(--space-1);border:none;flex-direction:column;min-width:0;margin:0;padding:0;display:flex}._legend_24q4n_11{margin-bottom:var(--space-2);font-family:var(--font-display);font-size:var(--text-body-sm);color:var(--text-primary);padding:0;font-weight:600}._option_24q4n_20{align-items:center;gap:var(--space-3);cursor:pointer;min-height:44px;display:flex}._option_24q4n_20:has(._input_24q4n_28:disabled){opacity:.55;cursor:default}._input_24q4n_28{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}._box_24q4n_42{border:1.5px solid var(--border-medium);border-radius:calc(var(--radius-sm) / 2);background:var(--surface-card);width:22px;height:22px;transition:border-color var(--duration-fast) var(--ease-gentle);flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}:is(._option_24q4n_20:hover:not(:has(._input_24q4n_28:disabled)) ._box_24q4n_42,._input_24q4n_28:checked+._box_24q4n_42){border-color:var(--color-secondary)}._input_24q4n_28:checked+._box_24q4n_42{background:var(--color-secondary)}._tick_24q4n_66{color:var(--white);transition:transform var(--duration-fast) var(--ease-settle);font-size:14px;transform:scale(0)}._input_24q4n_28:checked+._box_24q4n_42 ._tick_24q4n_66{transform:scale(1)}._input_24q4n_28:focus-visible+._box_24q4n_42{outline:3px solid var(--color-secondary-tint);outline-offset:2px}._label_24q4n_82{color:var(--text-primary);line-height:1.35}._title_17bu1_1{font-size:var(--text-display-md)}._loading_17bu1_5{text-align:center;color:var(--text-tertiary);margin:0}._empty_17bu1_11{margin:0}._list_17bu1_15{margin:calc(-1 * var(--space-3));padding:0;list-style:none}._item_17bu1_21+._item_17bu1_21{border-top:1.5px solid var(--border-soft)}._link_17bu1_25{align-items:center;gap:var(--space-3);min-height:44px;padding:var(--space-3);border-radius:var(--radius-sm);color:var(--text-primary);text-decoration:none;display:flex}._link_17bu1_25:hover{color:var(--text-primary);background:var(--color-primary-tint)}._link_17bu1_25:focus-visible{outline:3px solid var(--color-secondary-tint);outline-offset:2px}._text_17bu1_46{flex-direction:column;flex:1;min-width:0;display:flex}._name_17bu1_53{font-weight:700}._count_17bu1_57{font-size:var(--text-caption);color:var(--text-secondary)}._badge_17bu1_62{flex-shrink:0}._caret_17bu1_66{color:var(--text-tertiary);flex-shrink:0}._dialog_1kr0a_1{width:min(440px, calc(100% - 2 * var(--space-4)));border:1.5px solid var(--border-soft);border-radius:var(--radius-xl);background:var(--surface-card);max-width:none;box-shadow:var(--shadow-lg);color:var(--text-primary);padding:0}._dialog_1kr0a_1[open]{animation:ds-settle-in var(--duration-base) var(--ease-gentle)}._dialog_1kr0a_1::backdrop{background:var(--surface-overlay)}._panel_1kr0a_20{gap:var(--space-3);padding:var(--space-6);flex-direction:column;display:flex}._title_1kr0a_27{font-size:var(--text-display-sm)}._body_1kr0a_31{font-size:var(--text-body-md);line-height:var(--leading-body);color:var(--text-secondary);text-wrap:pretty}._actions_1kr0a_38{justify-content:flex-end;gap:var(--space-3);margin-top:var(--space-2);flex-wrap:wrap;display:flex}@media (prefers-reduced-motion:reduce){._dialog_1kr0a_1[open]{animation:none}}._button_12enn_1{border-radius:var(--radius-pill);width:44px;height:44px;color:var(--text-primary);cursor:pointer;transition:background var(--duration-fast) var(--ease-gentle);background:0 0;border:none;justify-content:center;align-items:center;padding:0;font-size:22px;display:inline-flex}._button_12enn_1:disabled{opacity:.35;cursor:default}._button_12enn_1:hover:not(:disabled),._button_12enn_1[aria-expanded=true]{background:var(--color-primary-tint)}._button_12enn_1:focus-visible{outline:3px solid var(--color-secondary-tint);outline-offset:2px}._filled_12enn_32{background:var(--color-primary);color:var(--white)}._filled_12enn_32:hover:not(:disabled){background:var(--color-primary-hover)}._filled_12enn_32:active:not(:disabled){background:var(--color-primary-active);transform:translateY(1px)}._wrap_fzxet_1{align-items:center;gap:var(--space-1);display:flex}._bar_fzxet_7{gap:var(--space-2);scrollbar-width:none;min-width:0;padding:var(--space-1);--fade-before:black;--fade-after:black;-webkit-mask-image:linear-gradient(to right, var(--fade-before), black var(--space-7), black calc(100% - var(--space-7)), var(--fade-after));mask-image:linear-gradient(to right, var(--fade-before), black var(--space-7), black calc(100% - var(--space-7)), var(--fade-after));flex:1;display:flex;overflow-x:auto}._fadeBefore_fzxet_21{--fade-before:transparent}._fadeAfter_fzxet_25{--fade-after:transparent}._arrow_fzxet_30{display:none}@media (width>=640px){._arrow_fzxet_30{display:inline-flex}}._back_clc0e_1{align-items:center;gap:var(--space-1);min-height:44px;font-family:var(--font-display);color:var(--text-secondary);font-weight:600;text-decoration:none;display:inline-flex}._back_clc0e_1:hover{color:var(--text-primary)}._title_clc0e_16{font-size:var(--text-display-md)}._position_clc0e_20{margin:0 0 var(--space-3);font-size:var(--text-caption);color:var(--text-secondary)}._moves_clc0e_26{justify-content:space-between;display:flex}._answer_clc0e_31{gap:var(--space-4);margin-top:var(--space-5);flex-direction:column;display:flex}._check_clc0e_38{align-items:center;gap:var(--space-3) var(--space-4);flex-wrap:wrap;display:flex}._verdict_clc0e_45{align-items:center;gap:var(--space-2);color:var(--text-primary);margin:0;font-weight:600;display:inline-flex}._thumb_clc0e_54{color:var(--color-success);flex-shrink:0;font-size:22px}._page_clc0e_60{gap:var(--space-5);flex-direction:column;display:flex}._problem_clc0e_66{gap:var(--space-5);flex-direction:column;min-width:0;display:flex}@media (width>=900px){._page_clc0e_60{grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);align-items:start;display:grid}._chat_clc0e_81{top:var(--space-5);height:calc(100dvh - var(--header-height) - var(--space-7) - var(--space-5));min-height:20rem;position:sticky}}._line_1axvg_2{align-items:center;gap:var(--space-2);font-size:var(--text-body-sm);line-height:var(--leading-body);color:var(--text-secondary);animation:ds-settle-in var(--duration-base) var(--ease-gentle) both;margin:0;display:flex}._chip_1axvg_13{border-radius:var(--radius-pill);background:var(--color-secondary);width:30px;height:30px;color:var(--white);flex-shrink:0;justify-content:center;align-items:center;font-size:16px;display:inline-flex}@media (prefers-reduced-motion:reduce){._line_1axvg_2{animation:none}}._turn_1ynsq_2{align-items:flex-end;gap:var(--space-2);max-width:min(100%,34rem);animation:ds-settle-in var(--duration-base) var(--ease-gentle) both;display:flex}._tutor_1ynsq_10{align-self:flex-start}._student_1ynsq_14{flex-direction:row-reverse;align-self:flex-end}._avatar_1ynsq_19,._room_1ynsq_20{flex-shrink:0;width:30px;height:30px;margin-bottom:2px}._avatar_1ynsq_19{border-radius:var(--radius-pill);color:var(--white);justify-content:center;align-items:center;font-size:16px;display:inline-flex}._tutor_1ynsq_10 ._avatar_1ynsq_19{background:var(--color-secondary)}._student_1ynsq_14 ._avatar_1ynsq_19{background:var(--color-primary)}._bubble_1ynsq_44{min-width:0;padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);font-size:var(--text-body-sm);line-height:var(--leading-body);overflow-wrap:anywhere;border:1.5px solid}._tutor_1ynsq_10 ._bubble_1ynsq_44{border-color:var(--bubble-tutor-border);border-bottom-left-radius:var(--radius-sm);background:var(--bubble-tutor-bg);color:var(--bubble-tutor-text)}._student_1ynsq_14 ._bubble_1ynsq_44{border-color:var(--bubble-student-border);border-bottom-right-radius:var(--radius-sm);background:var(--bubble-student-bg);color:var(--bubble-student-text)}._dots_1ynsq_69{align-items:center;gap:5px;padding:2px 0;display:inline-flex}._dots_1ynsq_69 span{border-radius:var(--radius-pill);background:var(--color-secondary);opacity:.55;width:7px;height:7px;animation:ds-settle-in var(--duration-slow) var(--ease-gentle) infinite alternate}._dots_1ynsq_69 span:nth-child(2){animation-delay:.14s}._dots_1ynsq_69 span:nth-child(3){animation-delay:.28s}@media (prefers-reduced-motion:reduce){._turn_1ynsq_2,._dots_1ynsq_69 span{animation:none}}._panel_8vb3g_1{border:1.5px solid var(--border-soft);border-radius:var(--radius-lg);background:var(--surface-card);height:100%;min-height:0;box-shadow:var(--shadow-sm);flex-direction:column;display:flex;overflow:hidden}._bare_8vb3g_13{flex-direction:column;flex:1;min-height:0;display:flex}._heading_8vb3g_20{padding:var(--space-4) var(--space-5);border-bottom:1.5px solid var(--border-soft);font-size:var(--text-body-md);margin:0}._log_8vb3g_27{gap:var(--space-4);min-height:0;padding:var(--space-5);flex-direction:column;flex:1;display:flex;overflow-y:auto}._text_8vb3g_38{white-space:pre-wrap}._footer_8vb3g_42{gap:var(--space-3);padding:var(--space-4) var(--space-5);border-top:1.5px solid var(--border-soft);flex-direction:column;display:flex}._divider_8vb3g_51{gap:var(--space-3);color:var(--text-secondary);font-family:var(--font-display);font-size:var(--text-caption);align-items:center;margin:0;font-weight:600;display:flex}._divider_8vb3g_51:before,._divider_8vb3g_51:after{border-top:1.5px solid var(--border-soft);content:"";flex:1}._composer_1c6dh_1{align-items:flex-end;gap:var(--space-2);display:flex}._box_1c6dh_7{min-width:0;max-height:calc(4 * var(--text-body-md) * var(--leading-body) + 2 * var(--space-2) + 3px);padding:var(--space-2) var(--space-4);border:1.5px solid var(--border-medium);border-radius:var(--radius-md);background:var(--surface-card);color:var(--text-primary);font:inherit;line-height:var(--leading-body);resize:none;scrollbar-width:none;flex:1;overflow-y:auto}._box_1c6dh_7::-webkit-scrollbar{display:none}._box_1c6dh_7:focus-visible{border-color:var(--color-secondary);box-shadow:0 0 0 3px var(--color-secondary-tint);outline:none}._box_1c6dh_7:disabled{background:var(--surface-sunken);opacity:.6}._sheet_vugr5_1{border:1.5px solid var(--border-soft);border-radius:var(--radius-xl) var(--radius-xl) 0 0;background:var(--surface-card);width:100%;max-width:100%;height:75dvh;max-height:75dvh;box-shadow:var(--shadow-lg);color:var(--text-primary);border-bottom:none;margin:auto 0 0;padding:0}._sheet_vugr5_1[open]{animation:ds-rise-in var(--duration-base) var(--ease-gentle)}._sheet_vugr5_1::backdrop{background:var(--surface-overlay)}._frame_vugr5_24{flex-direction:column;height:100%;display:flex}._handle_vugr5_30{width:40px;height:4px;margin-top:var(--space-2);border-radius:var(--radius-pill);background:var(--border-medium);align-self:center}._header_vugr5_39{justify-content:space-between;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-3) var(--space-3) var(--space-5);border-bottom:1.5px solid var(--border-soft);display:flex}._title_vugr5_48{font-size:var(--text-body-md)}._body_vugr5_52{flex-direction:column;flex:1;min-height:0;display:flex}@media (prefers-reduced-motion:reduce){._sheet_vugr5_1[open]{animation:none}}._ask_l1cfh_2{bottom:var(--space-4);justify-content:flex-end;display:flex;position:sticky}._anchor_l1cfh_9{border-radius:var(--radius-pill);box-shadow:var(--shadow-md);display:inline-flex;position:relative}._dot_l1cfh_16{border-radius:var(--radius-pill);background:var(--color-secondary);width:10px;height:10px;box-shadow:0 0 0 2px var(--surface-page);position:absolute;top:-2px;right:-2px}._status_l1cfh_28{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}._image_nyoed_1{max-width:100%;height:auto;display:block}._field_a8edk_1{flex-direction:column;gap:6px;width:100%;display:flex}._label_a8edk_8{font-family:var(--font-display);font-size:var(--text-body-sm);color:var(--text-primary);font-weight:600}._input_a8edk_15{border:1.5px solid var(--border-medium);border-radius:var(--radius-md);background:var(--surface-card);width:100%;min-height:44px;color:var(--text-primary);font:inherit;transition:border-color var(--duration-fast) var(--ease-gentle), box-shadow var(--duration-fast) var(--ease-gentle);padding:10px 14px}._input_a8edk_15:focus{border-color:var(--color-secondary);box-shadow:0 0 0 3px var(--color-secondary-tint);outline:none}._inline_a8edk_35{align-items:center;gap:var(--space-2);flex-direction:row}._inline_a8edk_35 ._label_a8edk_8{white-space:nowrap}._sm_a8edk_45 ._input_a8edk_15{min-height:34px;padding:0 10px}._logo_q7bck_1{align-items:center;gap:var(--space-3);display:inline-flex}._mark_q7bck_7{flex-shrink:0;width:32px;height:32px;display:block}._wordmark_q7bck_14{font-family:var(--font-display);letter-spacing:-.01em;color:var(--text-primary);font-size:28px;font-weight:800;line-height:1}@media (width<=479px){._wordmark_q7bck_14{display:none}}._page_7rm2v_1{min-height:100vh;padding:var(--space-9) var(--space-6);justify-content:center;align-items:flex-start;display:flex}._column_7rm2v_9{width:100%;max-width:400px}._form_7rm2v_14{gap:var(--space-5);flex-direction:column;display:flex}._title_7rm2v_20{font-size:var(--text-display-md)}@media (width<=479px){._page_7rm2v_1{padding:var(--space-7) var(--space-4)}._column_7rm2v_9{max-width:none}}._loading_xqynv_1{padding:var(--space-9) var(--space-6);text-align:center;color:var(--text-tertiary);margin:0}._modal_1h3wm_1{width:min(440px, calc(100% - 2 * var(--space-4)));border:1.5px solid var(--border-soft);border-radius:var(--radius-xl);background:var(--surface-card);max-width:none;box-shadow:var(--shadow-lg);color:var(--text-primary);padding:0}._modal_1h3wm_1[open]{animation:ds-settle-in var(--duration-base) var(--ease-gentle)}._modal_1h3wm_1::backdrop{background:var(--surface-overlay)}._header_1h3wm_20{justify-content:space-between;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-3) var(--space-3) var(--space-6);border-bottom:1.5px solid var(--border-soft);display:flex}._title_1h3wm_29{font-size:var(--text-display-sm)}._body_1h3wm_33{gap:var(--space-4);padding:var(--space-6);flex-direction:column;display:flex}@media (prefers-reduced-motion:reduce){._modal_1h3wm_1[open]{animation:none}}._control_ng558_1{border:none;min-width:0;margin:0;padding:0}._legend_ng558_8{margin-bottom:var(--space-2);font-family:var(--font-display);font-size:var(--text-body-sm);color:var(--text-primary);padding:0;font-weight:600}._track_ng558_17{border:1.5px solid var(--border-soft);border-radius:var(--radius-pill);background:var(--surface-sunken);grid-auto-columns:1fr;grid-auto-flow:column;padding:4px;display:grid}._segment_ng558_27{border-radius:var(--radius-pill);min-height:44px;font-family:var(--font-display);font-size:var(--text-body-sm);color:var(--text-tertiary);white-space:nowrap;cursor:pointer;transition:background var(--duration-base) var(--ease-settle), color var(--duration-fast) var(--ease-gentle);justify-content:center;align-items:center;padding:8px 16px;font-weight:600;display:flex}._segment_ng558_27:hover{color:var(--text-secondary)}._segment_ng558_27:has(._radio_ng558_49:checked){background:var(--surface-card);box-shadow:var(--shadow-sm);color:var(--text-primary);font-weight:700}._segment_ng558_27:has(._radio_ng558_49:focus-visible){outline:3px solid var(--color-secondary-tint);outline-offset:1px}._segment_ng558_27:has(._radio_ng558_49:disabled){opacity:.5;cursor:default}._radio_ng558_49{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}._form_pupuh_1{gap:var(--space-6);border:none;flex-direction:column;min-width:0;margin:0;padding:0;display:flex}._loading_pupuh_11{text-align:center;color:var(--text-tertiary);margin:0}:root{--header-height:68px}._header_1tpj6_6{min-height:var(--header-height);align-items:center;gap:var(--space-6);padding:var(--space-3) var(--space-6);background:var(--surface-card);box-shadow:var(--shadow-sm);display:flex;position:relative}._sectionLabel_1tpj6_17{min-width:0;font-family:var(--font-display);font-size:var(--text-body-lg);color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;flex:1;font-weight:700;display:none;overflow:hidden}._menuToggle_1tpj6_30{margin-left:auto;display:none}._menu_1tpj6_30{align-items:center;gap:var(--space-6);flex:1;display:flex}._nav_1tpj6_42{gap:var(--space-2);flex:1;display:flex}._link_1tpj6_48{min-height:44px;padding:0 var(--space-4);border-radius:var(--radius-pill);font-family:var(--font-display);font-size:inherit;color:var(--text-secondary);cursor:pointer;background:0 0;border:none;align-items:center;font-weight:600;text-decoration:none;display:inline-flex}._link_1tpj6_48:hover,._link_1tpj6_48[aria-current=page]{color:var(--text-primary);background:var(--color-primary-tint)}._main_1tpj6_74{gap:var(--space-5);max-width:var(--container-max);padding:var(--space-7) var(--space-6);flex-direction:column;margin:0 auto;display:flex}@media (width<=639px){._header_1tpj6_6{gap:var(--space-3);padding:var(--space-3) var(--space-4)}._sectionLabel_1tpj6_17{display:block}._menuToggle_1tpj6_30{display:inline-flex}._menu_1tpj6_30{z-index:1;align-items:stretch;gap:var(--space-3);padding:var(--space-4);background:var(--surface-card);box-shadow:var(--shadow-md);animation:ds-settle-in var(--duration-base) var(--ease-gentle);flex-direction:column;display:none;position:absolute;top:100%;left:0;right:0}._menu_1tpj6_30[data-open=true]{display:flex}._nav_1tpj6_42{flex-direction:column}._main_1tpj6_74{padding:var(--space-6) var(--space-4)}}@media (prefers-reduced-motion:reduce){._menu_1tpj6_30{animation:none}}