.blog_index__fifEh{max-width:720px}.blog_indexHeader__50CU3{margin-bottom:20px}.blog_indexTitle__pciAL{font-size:22px;font-weight:600;color:var(--text);letter-spacing:-.02em;margin:0 0 6px}.blog_indexSubtitle__ktps9{font-size:14px;color:var(--text-secondary);line-height:1.65;margin:0}.blog_indexEmpty__njqDC{font-size:14px;color:var(--text-tertiary);margin:0}.blog_indexFilters__Lr6TS{display:flex;flex-direction:column;gap:10px;margin-bottom:16px;padding:12px 14px;background:var(--surface);border:1px solid var(--border);border-radius:8px}.blog_indexFilterSearch__0Z1CR{width:100%;padding:8px 10px;font-size:13px;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:6px}.blog_indexFilterField__BMSua{display:flex;flex-direction:column;gap:4px}.blog_indexFilterLabel__IKWBg{font-size:10px;font-weight:600;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.06em}.blog_indexFilterSelect__gQx2R{padding:7px 10px;font-size:13px;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:6px}.blog_indexFilterTagRow__h8mtS{display:flex;gap:8px;align-items:center}.blog_indexFilterTagInput__Zk4me{flex:1;min-width:0;padding:7px 10px;font-size:13px;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:6px}.blog_indexFilterClear__V0hJT,.blog_indexFilterTagBtn__EufIr{padding:7px 12px;font-size:12px;font-weight:500;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:6px;cursor:pointer}.blog_indexFilterActions__WggP_{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.blog_indexFilterSubmit__gA_F6{padding:8px 14px;font-size:13px;font-weight:600;color:#fff;background:var(--blue);border:1px solid var(--blue-border);border-radius:6px;cursor:pointer}.blog_indexFilterSubmit__gA_F6:hover{filter:brightness(1.05)}.blog_indexFilterClearLink__KhGEs{font-size:13px;color:var(--text-secondary);text-decoration:none}.blog_indexFilterClearLink__KhGEs:hover{color:var(--text);text-decoration:underline}.blog_indexFilterClear__V0hJT{align-self:flex-start;color:var(--text-secondary)}.blog_indexFilterClear__V0hJT:hover,.blog_indexFilterTagBtn__EufIr:hover{border-color:var(--blue-border)}.blog_indexList__j7x11{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.blog_indexCard___AnHX{display:flex;flex-direction:column;gap:4px;padding:14px 16px;background:var(--surface);border:1px solid var(--border);border-radius:8px;text-decoration:none;transition:border-color .15s}.blog_indexCard___AnHX:hover{border-color:var(--blue-border)}.blog_indexCardMeta__hfAf5{display:flex;flex-wrap:wrap;align-items:center;gap:6px}.blog_indexCategory__0S4pI{font-size:11px;font-weight:500;color:var(--text-tertiary)}.blog_indexPagination__TcUiT{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:16px;padding-top:14px;border-top:1px solid var(--border)}.blog_indexPaginationMeta__Iw_BH{font-size:12px;color:var(--text-tertiary);margin:0}.blog_indexPaginationActions__anT3Q{display:flex;align-items:center;gap:8px}.blog_indexPaginationBtn__3CfYh{display:inline-flex;align-items:center;padding:6px 12px;font-size:12px;font-weight:500;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:6px;text-decoration:none;transition:border-color .15s}.blog_indexPaginationBtn__3CfYh:hover{border-color:var(--blue-border)}.blog_indexPaginationBtnDisabled__NLz8G{opacity:.45;pointer-events:none}.blog_indexCardTitle__oO24S{font-size:15px;font-weight:600;color:var(--text);line-height:1.35}.blog_indexCardExcerpt__binQq{font-size:13px;color:var(--text-secondary);line-height:1.55}.blog_indexCardDate__UjLGF{font-size:11px;color:var(--text-tertiary);margin-top:2px}.blog_article___02Ng{max-width:720px}.blog_articleWithAside__MxbLh{display:flex;gap:20px;align-items:flex-start}.blog_articleMain__R7JZo{flex:1;min-width:0}.blog_articleAside__O__Cd{width:200px;flex-shrink:0;position:sticky;top:16px}@media (max-width:900px){.blog_articleWithAside__MxbLh{flex-direction:column}.blog_articleAside__O__Cd{width:100%;position:static}}.blog_hero___uE4n{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:20px 22px;margin-bottom:16px}.blog_heroTitle__QCPjE{font-size:22px;font-weight:600;color:var(--text);letter-spacing:-.02em;margin:0 0 8px;line-height:1.25}.blog_heroDek__tzwpm{font-size:14px;color:var(--text-secondary);line-height:1.65;margin:0 0 12px}.blog_heroMeta__JsNxv{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:12px;color:var(--text-tertiary)}.blog_badge__4hRMZ{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:500;background:var(--blue-bg);color:var(--blue);border:1px solid var(--blue-border)}.blog_block__3hzrz{margin-bottom:16px}.blog_tldr__84Qu_{background:var(--blue-bg);border:1px solid var(--blue-border);border-radius:8px;padding:14px 16px}.blog_tldrLabel__o4Bx_{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--blue);margin:0 0 6px}.blog_tldrBody__1ECOQ{font-size:14px;color:var(--text);line-height:1.65;margin:0}.blog_heading2__jq8nV{font-size:18px;margin:20px 0 8px;letter-spacing:-.01em}.blog_heading2__jq8nV,.blog_heading3__j4_wV{font-weight:600;color:var(--text);scroll-margin-top:72px}.blog_heading3__j4_wV{font-size:15px;margin:16px 0 6px}.blog_prose__2dTJh{font-size:14px;color:var(--text-secondary);line-height:1.75}.blog_prose__2dTJh p{margin:0 0 12px}.blog_prose__2dTJh a{color:var(--blue);text-decoration:underline;text-underline-offset:2px}.blog_prose__2dTJh a:hover{color:var(--blue-hover)}.blog_richText___qiRX{font-size:14px;color:var(--text-secondary);line-height:1.75}.blog_richText___qiRX h2{font-size:17px;font-weight:600;color:var(--text);margin:18px 0 8px}.blog_richText___qiRX h3{font-size:15px;font-weight:600;color:var(--text);margin:14px 0 6px}.blog_richText___qiRX ol,.blog_richText___qiRX ul{margin:0 0 12px;padding-left:1.25rem}.blog_richText___qiRX li{margin-bottom:4px}.blog_richText___qiRX a{color:var(--blue)}.blog_callout__o8DKd{border-radius:8px;padding:12px 14px;font-size:13px;line-height:1.65;border:1px solid var(--border)}.blog_calloutTip__6RuPz{background:var(--green-bg);border-color:var(--green-border);color:var(--text)}.blog_calloutWarning__pQV54{background:var(--amber-bg);border-color:var(--amber-border);color:var(--text)}.blog_calloutInfo__j2seI,.blog_calloutNote__e3YPP{background:var(--surface);border-color:var(--border);color:var(--text-secondary)}.blog_caption__Qn_uN{font-size:12px;color:var(--text-tertiary);margin-top:6px;line-height:1.5}.blog_image__gDVgD{width:100%;height:auto;border-radius:8px;border:1px solid var(--border);display:block}.blog_mermaidWrap__3beY1{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px;overflow-x:auto}.blog_mermaidCanvas__Qm1as{display:flex;justify-content:center;min-height:48px}.blog_mermaidCanvas__Qm1as svg{max-width:100%;height:auto}.blog_steps__SjLXi{display:flex;flex-direction:column;gap:10px}.blog_stepCard__3Lz1N{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px 14px}.blog_stepTitle__DhqUv{font-size:13px;font-weight:600;color:var(--text);margin:0 0 4px}.blog_stepBody__HwjEv{font-size:13px;color:var(--text-secondary);line-height:1.65;margin:0}.blog_tableWrap__wYpFm{overflow-x:auto;border:1px solid var(--border);border-radius:8px}.blog_table__PiW_6{width:100%;border-collapse:collapse;font-size:13px}.blog_table__PiW_6 td,.blog_table__PiW_6 th{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border)}.blog_table__PiW_6 th{background:var(--surface);font-weight:600;color:var(--text)}.blog_table__PiW_6 td{color:var(--text-secondary)}.blog_table__PiW_6 tr:last-child td{border-bottom:none}.blog_faqList__3FJP_{display:flex;flex-direction:column;gap:8px}.blog_faqItem__cDA0T{background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden}.blog_faqSummary__6Uy5b{padding:12px 14px;font-size:13px;font-weight:600;color:var(--text);cursor:pointer;list-style:none}.blog_faqSummary__6Uy5b::-webkit-details-marker{display:none}.blog_faqAnswer__T535W{padding:0 14px 12px;font-size:13px;color:var(--text-secondary);line-height:1.65}.blog_cta__u0rEY{display:inline-flex;align-items:center;justify-content:center;padding:10px 18px;border-radius:6px;font-size:13px;font-weight:600;background:var(--blue);color:#fff;text-decoration:none;border:none}.blog_cta__u0rEY:hover{background:var(--blue-hover);color:#fff}.blog_linkCard__TAUnk{display:block;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:14px 16px;text-decoration:none;transition:border-color .15s}.blog_linkCard__TAUnk:hover{border-color:var(--blue-border)}.blog_linkCardTitle__W78I5{font-size:14px;font-weight:600;color:var(--text);margin:0 0 4px}.blog_linkCardDesc__SySAk{font-size:12px;color:var(--text-tertiary);margin:0;line-height:1.5}.blog_embedWrap__R_y1G{position:relative;width:100%;padding-bottom:56.25%;border-radius:8px;overflow:hidden;border:1px solid var(--border);background:var(--code-bg)}.blog_embedIframe__I1BUu{position:absolute;inset:0;width:100%;height:100%;border:0}.blog_toc__Gv7jL{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px 14px}.blog_tocLabel__ONxBk{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary);margin:0 0 8px}.blog_tocList__XkjWZ{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}.blog_tocLink__MLD_l{font-size:12px;color:var(--text-secondary);text-decoration:none;line-height:1.4;display:block}.blog_tocLink__MLD_l:hover{color:var(--blue)}.blog_tocLinkL3__QzeVE{padding-left:10px}.blog_related__DYHCm{margin-top:20px;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px 14px}.blog_relatedTitle__87pVw{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary);margin:0 0 8px}.blog_relatedList__pN_Rq{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.blog_relatedLink__GBu3g{font-size:12px;color:var(--blue);text-decoration:none}.blog_relatedLink__GBu3g:hover{text-decoration:underline}.learn_shell__G0buQ{display:flex;height:100dvh;overflow:hidden;background:var(--side);position:relative;padding-left:env(safe-area-inset-left,0);padding-right:env(safe-area-inset-right,0)}.learn_sidebarBackdrop__mCN5I{position:fixed;inset:0;z-index:30;margin:0;padding:0;border:none;cursor:pointer;background:rgba(1,4,9,.45)}.learn_sidebar__nRjLt{--sidebar-width:220px;width:var(--sidebar-width);flex-shrink:0;background:var(--side);display:flex;flex-direction:column;border-right:1px solid var(--side-border);height:100dvh;overflow:hidden;z-index:40;transition:width .2s ease}.learn_sidebarCollapsed__oFNZt{--sidebar-width:56px;cursor:pointer}.learn_sidebarExpanded__uM97z{--sidebar-width:220px}@media (max-width:767px){.learn_sidebarExpanded__uM97z{box-shadow:8px 0 24px rgba(0,0,0,.35)}.learn_content__i7yuL{padding:16px}.learn_topbar__d_O8O{padding:0 12px}.learn_listHeader__0ztzF{margin-bottom:14px}.learn_listTitle__I47P2{font-size:17px}.learn_langHubHero__sHZPC{margin-bottom:22px}.learn_langHubHeroInner__e3SeF{padding:4px 0 8px}.learn_langHubLead__sjWgf{font-size:13px;margin-bottom:16px}.learn_langHubStats__FNYBI{gap:14px 20px}}@media (max-width:479px){.learn_cardGrid__Hxwt8,.learn_langHubCards__zEUEv,.learn_langIndexGrid__wGnPR{grid-template-columns:1fr;gap:12px}.learn_learnCard__2pswF{min-height:0;padding:14px}.learn_langIndexCard__w9Ejt{min-height:0;padding:16px}.learn_langHubCard__4MEi4{padding:16px}.learn_listTitle__I47P2{font-size:16px}.learn_langHubTitle__rJErx{font-size:clamp(20px,6.5vw,26px)}.learn_langIndexSectionTitle__tJhNU{margin-bottom:10px}}@media (hover:none){.learn_langIndexCard__w9Ejt:hover,.learn_learnCard__2pswF:hover{transform:none}}.learn_brand__xs79E{padding:16px 14px 12px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--side-border);text-decoration:none;color:inherit;flex-shrink:0}.learn_sidebarCollapsed__oFNZt .learn_brand__xs79E{justify-content:center;padding:14px 8px 12px;gap:0}.learn_brandLogo__hWxT9{display:flex;align-items:center;justify-content:flex-start;flex-shrink:0;min-width:0}.learn_sidebarCollapsed__oFNZt .learn_brandLogo__hWxT9{justify-content:center}.learn_brandLogoExpanded__U1LJL{display:block;height:28px;width:auto;max-width:100%;object-fit:contain;object-position:left center}.learn_brandLogoCollapsed___N7cc{display:block;height:24px;width:24px;object-fit:contain}.learn_langSection__1I_sL{padding:12px 10px 8px;border-bottom:1px solid var(--side-border);flex-shrink:0}.learn_sidebarCollapsed__oFNZt .learn_langSection__1I_sL{padding:8px 6px}.learn_langLabel__IClWo{font-size:9px;font-weight:500;color:var(--side-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:7px;padding-left:3px}.learn_sidebarCollapsed__oFNZt .learn_langLabel__IClWo{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.learn_langSelectWrap__L0sIo{position:relative;width:100%}.learn_langSelect__rWzTc{width:100%;font-size:11px;font-weight:500;padding:6px 28px 6px 10px;border-radius:6px;background-color:var(--side-2);color:var(--side-text);border:1px solid var(--side-border);font-family:IBM Plex Mono,monospace;cursor:pointer;appearance:none;line-height:1.4;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6' fill='none'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%238b949e' stroke-width='1.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;transition:border-color .12s,background-color .12s}.learn_langSelect__rWzTc:hover{border-color:var(--side-muted)}.learn_langSelect__rWzTc:focus-visible{outline:2px solid var(--blue);outline-offset:1px}.learn_langSelectWrapCollapsed__2RuMd .learn_langSelect__rWzTc{color:transparent;text-align:center;padding:0;min-width:40px;min-height:40px;background-position:right 4px center}.learn_langSelectMonogram__d8J0s{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:600;color:var(--side-text);font-family:IBM Plex Mono,monospace;pointer-events:none}.learn_sidebarNav__uHZz3{padding:8px 6px;flex-shrink:0}.learn_sidebarLessonScroll__ZBiIS{flex:1;min-height:0;overflow:hidden;display:flex;flex-direction:column}.learn_navItem__zadzu{padding:6px 9px;border-radius:5px;cursor:pointer;display:flex;align-items:center;gap:9px;transition:background .1s;margin-bottom:1px;text-decoration:none;color:inherit;min-height:44px}.learn_sidebarCollapsed__oFNZt .learn_navItem__zadzu{justify-content:center;padding:10px 8px;gap:0}.learn_navItemText__oSavY{font-size:12px;color:var(--side-muted);transition:color .1s,opacity .15s ease,max-width .2s ease;white-space:nowrap;overflow:hidden}.learn_sidebarCollapsed__oFNZt .learn_navItemText__oSavY{opacity:0;max-width:0;overflow:hidden;pointer-events:none}.learn_navItemActive__H7Tas,.learn_navItem__zadzu:hover{background:var(--side-2)}.learn_navItemActive__H7Tas .learn_navItemText__oSavY,.learn_navItem__zadzu:hover .learn_navItemText__oSavY{color:var(--side-text)}.learn_navIcon__RTK1J{opacity:.5;flex-shrink:0}.learn_navItemActive__H7Tas .learn_navIcon__RTK1J{opacity:.8}.learn_lessonNavSection__ePzmA{display:flex;flex-direction:column;min-height:100%;border-top:1px solid var(--side-border);padding:8px 0 6px}.learn_lessonNavTitle__assSU{display:block;flex-shrink:0;font-size:11px;color:var(--side-muted);font-weight:500;padding:5px 15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border-radius:4px;text-decoration:none;transition:background .1s,color .1s}.learn_lessonNavTitle__assSU:hover{background:var(--side-2);color:var(--side-text)}.learn_lessonNavExercises__SpvyZ{display:block;flex-shrink:0;font-size:10px;color:var(--side-muted);font-weight:500;padding:4px 15px 6px;text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background .15s,color .15s}.learn_lessonNavExercises__SpvyZ:hover{background:var(--side-2);color:var(--side-text)}.learn_lessonNavList__S7vJk{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;padding:0 6px 0 12px;display:flex;flex-direction:column;gap:1px}.learn_lessonItem__bR5Yn{padding:5px 9px;border-radius:4px;display:flex;align-items:flex-start;gap:7px;border-left:2px solid transparent;font-size:11px;color:var(--side-muted);text-decoration:none;transition:all .1s}.learn_lessonItemActive__wdkMB,.learn_lessonItem__bR5Yn:hover{background:var(--side-2);color:var(--side-text)}.learn_lessonItemActive__wdkMB{border-left-color:var(--blue);border-radius:0 4px 4px 0}.learn_lessonDot__Y4b31{width:10px;height:10px;border-radius:50%;border:1.5px solid;flex-shrink:0;display:flex;align-items:center;justify-content:center}.learn_lessonDotActive__AXP9X:after{content:"";width:3px;height:3px;background:#fff;border-radius:50%}.learn_lessonDot_concept__aEPUe{border-color:var(--blue)}.learn_lessonDot_mcq__jObVK{border-color:var(--green)}.learn_lessonDot_codeblock_rearranging__9BgYq{border-color:var(--amber)}.learn_lessonDot_fill_in_blanks__I0dBk{border-color:#a371f7}.learn_lessonItemActive__wdkMB .learn_lessonDotActive__AXP9X.learn_lessonDot_concept__aEPUe{background:var(--blue);border-color:var(--blue)}.learn_lessonItemActive__wdkMB .learn_lessonDotActive__AXP9X.learn_lessonDot_mcq__jObVK{background:var(--green);border-color:var(--green)}.learn_lessonItemActive__wdkMB .learn_lessonDotActive__AXP9X.learn_lessonDot_codeblock_rearranging__9BgYq{background:var(--amber);border-color:var(--amber)}.learn_lessonItemActive__wdkMB .learn_lessonDotActive__AXP9X.learn_lessonDot_fill_in_blanks__I0dBk{background:#a371f7;border-color:#a371f7}.learn_lessonItemMain__V4iXE{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}.learn_lessonItemText__oJATI{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;line-height:1.3}.learn_lessonTypePill__gMGgO{font-size:9px;font-weight:600;letter-spacing:.03em;line-height:1;padding:2px 5px;border-radius:3px;align-self:flex-start}.learn_lessonTypePill_concept__oArrw{color:#79c0ff;background:rgba(56,139,253,.15)}.learn_lessonTypePill_mcq__eu1M_{color:#3fb950;background:rgba(63,185,80,.15)}.learn_lessonTypePill_codeblock_rearranging__D1w9U{color:#e3b341;background:rgba(227,179,65,.15)}.learn_lessonTypePill_fill_in_blanks__kt0Ja{color:#d2a8ff;background:rgba(163,113,247,.15)}.learn_sidebarVivyWrap__VKSty{flex-shrink:0;padding:6px 6px 0;border-top:1px solid var(--side-border)}.learn_vivyNavItem__jh3px{width:100%;padding:6px 9px;border-radius:5px;cursor:pointer;display:flex;align-items:center;gap:9px;margin-bottom:1px;border:1px solid transparent;background:linear-gradient(var(--side),var(--side)) padding-box,linear-gradient(135deg,rgba(9,105,218,.55),rgba(110,64,201,.55)) border-box;color:inherit;font-family:inherit;min-height:44px;transition:background .1s,border-color .1s}.learn_sidebarCollapsed__oFNZt .learn_vivyNavItem__jh3px{position:relative;justify-content:center;padding:10px 8px;gap:0}.learn_vivyNavItem__jh3px:hover{background:linear-gradient(var(--side-2),var(--side-2)) padding-box,linear-gradient(135deg,rgba(9,105,218,.75),rgba(110,64,201,.75)) border-box}.learn_vivyNavIcon__FFOCU{flex-shrink:0;font-size:16px;line-height:1}.learn_sidebarCollapsed__oFNZt .learn_vivyNavIcon__FFOCU{font-size:20px}.learn_vivyNavBadge__Zg9Xd{margin-left:auto;padding:1px 7px;border-radius:9999px;background:#0969da;color:#fff;font-size:10px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;flex-shrink:0}.learn_sidebarCollapsed__oFNZt .learn_vivyNavBadge__Zg9Xd{position:absolute;top:2px;right:2px;margin-left:0;padding:0 4px;font-size:8px}.learn_sidebarFoot__lfUCZ{display:flex;align-items:center;gap:8px;border-top:1px solid var(--side-border);padding:10px 14px;flex-shrink:0}.learn_sidebarCollapsed__oFNZt .learn_sidebarFoot__lfUCZ{flex-direction:column;justify-content:center;padding:10px 8px;gap:10px}.learn_sidebarCollapsed__oFNZt .learn_signInLink__oN01l{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.learn_avatar__BJvyv{width:26px;height:26px;border-radius:50%;background:var(--side-3);border:1.5px solid var(--side-border);display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--side-muted);font-weight:500}.learn_signInLink__oN01l{font-size:12px;color:var(--side-muted);text-decoration:none}.learn_signInLink__oN01l:hover{color:var(--side-text)}.learn_main__DatOF{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}.learn_mainNavWrap__kSqVy{flex:1;display:flex;flex-direction:column;min-height:0;position:relative}.learn_mainNavFallback__LMXFx{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;overflow:auto;background:var(--bg)}.learn_mainNavContentPending__A0J4i,.learn_mainNavContent__QIphM{flex:1;display:flex;flex-direction:column;min-height:0}.learn_mainNavContentPending__A0J4i{visibility:hidden;pointer-events:none}.learn_topbar__d_O8O{min-height:48px;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 24px;background:var(--surface);flex-shrink:0}.learn_topbarRow__Xqen7{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-width:0}.learn_topbarBreadcrumb__ANKEG{flex:1;min-width:0;overflow:hidden}.learn_topbarRight__x_4V6{flex-shrink:0;display:flex;align-items:center;justify-content:flex-end}.learn_breadcrumbCompact__l0WZG,.learn_breadcrumbFull__iodh_,.learn_breadcrumb__gI1CV{display:flex;align-items:center;gap:5px;flex-wrap:nowrap;min-width:0;overflow:hidden}.learn_breadcrumbCompact__l0WZG{display:none}@media (max-width:767px){.learn_breadcrumbFull__iodh_{display:none}.learn_breadcrumbCompact__l0WZG{display:flex}}.learn_crumb__VO4In{font-size:12px;color:var(--text-tertiary);padding:2px 4px;border-radius:3px;transition:color .1s;text-decoration:none;flex-shrink:0}.learn_crumb__VO4In:hover{color:var(--text)}.learn_crumbCurrent__3Ewg7{color:var(--text);font-weight:500;cursor:default;flex-shrink:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.learn_crumbEllipsis__cnHp8{flex-shrink:0;padding-inline:6px;font-weight:600;letter-spacing:.02em}.learn_crumbSep__MhkRr{color:var(--text-tertiary);font-size:12px;flex-shrink:0}@media (max-width:767px){.learn_topbarWithRight__nRAtQ{align-items:stretch;padding:8px 12px}.learn_topbarWithRight__nRAtQ .learn_topbarRow__Xqen7{flex-direction:column;align-items:stretch;gap:8px}.learn_topbarWithRight__nRAtQ .learn_topbarBreadcrumb__ANKEG{flex:none}.learn_topbarWithRight__nRAtQ .learn_topbarRight__x_4V6{justify-content:flex-start;flex-wrap:wrap;gap:6px}}.learn_content__i7yuL{flex:1;overflow-y:auto;padding:22px 24px}.learn_listHeader__0ztzF{margin-bottom:18px}.learn_listTitle__I47P2{font-size:18px;font-weight:600;color:var(--text);letter-spacing:-.02em;margin:0}.learn_listSub__rm9Gn{font-size:12px;color:var(--text-secondary);margin:3px 0 0}.learn_cardGrid__Hxwt8{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));gap:14px}.learn_learnCard__2pswF{position:relative;display:flex;flex-direction:column;gap:10px;padding:16px;min-height:168px;border-radius:10px;border:1px solid var(--border);background:var(--surface);text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s,transform .15s}.learn_learnCard__2pswF:hover{border-color:var(--blue-border);box-shadow:0 6px 20px rgba(9,105,218,.08);transform:translateY(-2px)}.learn_learnCardLocked__iR_IZ{opacity:.72}.learn_learnCardTop__xdAt1{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}.learn_indexBadge__7uewO{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 8px;border-radius:10px;font-family:IBM Plex Mono,monospace;font-size:15px;font-weight:600;color:var(--blue);background:var(--blue-bg);border:1px solid var(--blue-border)}.learn_kindPill__dK1vN{font-size:10px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;padding:3px 8px;border-radius:20px;background:var(--bg);color:var(--text-tertiary);border:1px solid var(--border)}.learn_cardTitle__x8cmv{margin:0;font-size:15px;font-weight:600;line-height:1.35;color:var(--text)}.learn_cardDesc__71pWr{margin:0;font-size:12px;line-height:1.5;color:var(--text-secondary);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex:1}.learn_cardFooter__UUcky{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto;padding-top:4px}.learn_cardMeta__wtcf_{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.learn_cardCta__RK7aZ{font-size:12px;font-weight:500;color:var(--blue);white-space:nowrap}.learn_cardChevron__JRFQu{font-size:14px;color:var(--text-tertiary)}.learn_topicTag__Lk8Ia{font-size:10px;padding:2px 8px;border-radius:4px;background:var(--bg);color:var(--text-secondary);border:1px solid var(--border)}.learn_summaryLine__rfmEu{font-size:12px;color:var(--text-secondary);margin:0 0 14px}.learn_topicPills__y1DYo{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}.learn_topicPill__wXcOR{font-size:11px;font-weight:500;padding:4px 10px;border-radius:20px;border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);cursor:default}.learn_topicPillActive__UQfZA{background:var(--blue-bg);color:var(--blue);border-color:var(--blue-border)}.learn_table__u_YEs{background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden}.learn_tableHead__SErDk{display:grid;grid-template-columns:40px 1fr 100px 70px 30px;border-bottom:1px solid var(--border);padding:0 14px}.learn_th__aj3gf{padding:9px 0;font-size:10px;font-weight:500;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.07em}.learn_tableRow__qrxzJ{display:grid;grid-template-columns:40px 1fr 100px 70px 30px;padding:0 14px;border-bottom:1px solid var(--border);align-items:center;background:var(--surface);transition:background .1s;text-decoration:none;color:inherit}.learn_tableRow__qrxzJ:hover{background:var(--bg)}.learn_tableRow__qrxzJ:last-child{border-bottom:none}.learn_rowNum__bHFK5{font-size:11px;color:var(--text-tertiary);font-family:IBM Plex Mono,monospace;padding:13px 0}.learn_rowTitleCell__Dn6JX{padding:13px 10px 13px 0;display:flex;align-items:center;gap:8px;min-width:0}.learn_rowTitleBlock__ceDAt{min-width:0;flex:1}.learn_rowTitle__48kBL{font-size:13px;font-weight:500;color:var(--text);margin:0}.learn_rowDesc__UeRKt{font-size:11px;color:var(--text-tertiary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%;margin:2px 0 0}.learn_rowTopic__4Abdc{font-size:11px;color:var(--blue);margin:2px 0 0}.learn_lockIcon__o0FRu{flex-shrink:0;opacity:.5}.learn_diffCell__YKGOU{display:flex;align-items:center;gap:5px;font-size:12px;color:var(--text-secondary)}.learn_diffDot__eVlU_{width:6px;height:6px;border-radius:50%;flex-shrink:0}.learn_dotBeginner__YPQXj{background:var(--green)}.learn_dotIntermediate__UdPJK{background:var(--amber)}.learn_dotAdvanced__ddjUc{background:var(--red)}.learn_chevron__RYXAE{color:var(--text-tertiary);font-size:14px;text-align:center}.learn_empty__Oix6P{padding:48px 24px;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:8px}.learn_emptyTitle__nuXsC{font-size:15px;font-weight:600;color:var(--text);margin:0 0 8px}.learn_emptyText__hnyYd{font-size:13px;color:var(--text-secondary);margin:0}.learn_fadeUp__uqVQd{animation:learn_fadeUp__uqVQd .2s ease}@keyframes learn_fadeUp__uqVQd{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){.learn_fadeUp__uqVQd{animation:none}}.learn_langHub__aGJDa{max-width:720px;padding:4px 0 32px}.learn_langIndex__R4Au4{max-width:960px}.learn_langIndexSectionTitle__tJhNU{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.06em;margin:0 0 14px;padding:0 2px}.learn_langIndexGrid__wGnPR{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));gap:14px;list-style:none;padding:0;margin:0}.learn_langIndexCard__w9Ejt{display:flex;flex-direction:column;align-items:flex-start;min-height:200px;padding:20px;border-radius:10px;border:1px solid var(--border);background:var(--surface);text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s,transform .15s}.learn_langIndexCard__w9Ejt:hover{border-color:var(--blue-border);box-shadow:0 6px 20px rgba(9,105,218,.08);transform:translateY(-2px)}.learn_langIndexCardFeatured__SBV5t{border-color:var(--blue-border);background:linear-gradient(145deg,var(--surface) 0,var(--blue-bg) 120%)}.learn_langIndexCardFeatured__SBV5t:hover{border-color:var(--blue)}.learn_langIndexCardHead__oAYBV{display:flex;align-items:center;justify-content:space-between;width:100%;margin-bottom:14px}.learn_langIndexMonogram__WI2fq{display:flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 10px;border-radius:8px;background:var(--blue-bg);border:1px solid var(--blue-border);color:var(--blue);font-size:13px;font-weight:600;font-family:IBM Plex Mono,monospace;letter-spacing:-.02em}.learn_langIndexIndex__cr0n7{font-size:11px;font-weight:500;font-family:IBM Plex Mono,monospace;color:var(--text-tertiary)}.learn_langIndexCardTitle__xCMql{display:block;font-size:16px;font-weight:600;color:var(--text);letter-spacing:-.02em;margin-bottom:8px}.learn_langIndexCardHint__Y3lp4{display:block;font-size:13px;color:var(--text-secondary);line-height:1.55;margin:0;flex:1}.learn_langIndexCardMeta__ijzP0{display:inline-block;margin-top:14px;font-size:11px;font-weight:500;font-family:IBM Plex Mono,monospace;color:var(--blue);padding:3px 8px;border-radius:20px;background:var(--blue-bg);border:1px solid var(--blue-border)}.learn_langIndexCardCta__IvUIU{display:block;margin-top:12px;font-size:12px;font-weight:600;color:var(--text)}.learn_langHubHero__sHZPC{position:relative;margin-bottom:28px;border-radius:12px;overflow:hidden}.learn_langHubGlow__zC3p1{position:absolute;inset:-50% -15% auto -15%;height:220px;background:radial-gradient(ellipse at 25% 45%,var(--hero-glow) 0,transparent 72%);pointer-events:none}.learn_langHubHeroInner__e3SeF{position:relative;padding:8px 4px 12px}.learn_langHubEyebrow__0zevy{display:inline-block;font-size:11px;font-weight:500;font-family:IBM Plex Mono,monospace;text-transform:uppercase;letter-spacing:.08em;color:var(--blue);background:var(--blue-bg);border:1px solid var(--blue-border);padding:4px 10px;border-radius:20px;margin:0 0 14px}.learn_langHubTitle__rJErx{font-size:clamp(24px,4vw,32px);font-weight:600;color:var(--text);letter-spacing:-.03em;line-height:1.15;margin:0 0 12px;max-width:520px}.learn_langHubLead__sjWgf{font-size:14px;color:var(--text-secondary);line-height:1.65;margin:0 0 20px;max-width:480px}.learn_langHubStats__FNYBI{display:flex;flex-wrap:wrap;gap:20px 28px}.learn_langHubStat__mmG8w{display:flex;flex-direction:column;gap:2px}.learn_langHubStatValue__kGODv{font-size:20px;font-weight:600;font-family:IBM Plex Mono,monospace;color:var(--text);letter-spacing:-.02em;line-height:1}.learn_langHubStatLabel__BT_3g{font-size:10px;font-weight:500;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.06em}.learn_langHubCards__zEUEv{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:14px}.learn_langHubCard__4MEi4{display:flex;flex-direction:column;align-items:flex-start;gap:0;padding:20px;border-radius:8px;border:1px solid var(--border);background:var(--surface);text-decoration:none;transition:border-color .15s,box-shadow .15s}.learn_langHubCard__4MEi4:hover{border-color:var(--border-2);box-shadow:var(--shadow-md)}.learn_langHubCardAccent__B8xFk{border-color:var(--blue-border);background:linear-gradient(145deg,var(--surface) 0,var(--blue-bg) 120%)}.learn_langHubCardAccent__B8xFk:hover{border-color:var(--blue)}.learn_langHubCardIcon__n_JD6{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:6px;background:var(--blue-bg);border:1px solid var(--blue-border);color:var(--blue);font-size:14px;font-family:IBM Plex Mono,monospace;margin-bottom:12px}.learn_langHubCardLabel___IWJC{display:block;font-size:14px;font-weight:600;color:var(--text);margin-bottom:8px}.learn_langHubCardHint__Zin3v{display:block;font-size:13px;color:var(--text-secondary);line-height:1.55;margin:0;flex:1}.learn_langHubCardMeta__cZFX_{display:inline-block;margin-top:14px;font-size:11px;font-weight:500;font-family:IBM Plex Mono,monospace;color:var(--blue);padding:3px 8px;border-radius:20px;background:var(--blue-bg);border:1px solid var(--blue-border)}@keyframes learn_skeletonPulse__s7DND{0%,to{opacity:.4}50%{opacity:.85}}.learn_skeleton__OTPJz{background:var(--border);border-radius:4px;animation:learn_skeletonPulse__s7DND 1.2s ease-in-out infinite}.learn_skeletonMt__rD_6E{margin-top:8px}.learn_skeletonRow__4BblI{pointer-events:none;opacity:.65}.learn_skeletonCard__Qh7xR{pointer-events:none}.learn_examLayout__u499Z,.learn_examWizard__nJE4A{width:100%;max-width:760px;margin-inline:auto}.learn_examSteps__f_92V{display:flex;gap:6px;margin-bottom:16px}.learn_examStepTab__rDeUL{font-size:12px;font-weight:500;padding:6px 12px;border-radius:6px;border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);cursor:pointer;font-family:inherit}.learn_examStepTab__rDeUL:hover:not(:disabled){color:var(--text);border-color:var(--text-tertiary)}.learn_examStepTab__rDeUL:disabled{opacity:.45;cursor:not-allowed}.learn_examStepTabActive__UWAbG{color:var(--text);border-color:var(--blue);background:var(--blue-bg)}.learn_examPickerList__zQD_K{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.learn_examPickerRow__j74_Z{display:grid;grid-template-columns:auto 28px 1fr auto;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--border);border-radius:6px;background:var(--surface);cursor:pointer;transition:border-color .12s}.learn_examPickerRow__j74_Z:hover{border-color:var(--text-tertiary)}.learn_examCheckbox__5SZ9s{width:15px;height:15px;accent-color:var(--blue)}.learn_examPickerIndex__nP66S{font-size:11px;font-family:IBM Plex Mono,monospace;color:var(--text-tertiary)}.learn_examPickerTitle__8dnrG{font-size:13px;font-weight:500;color:var(--text);min-width:0}.learn_examBadges__LCKD9{display:flex;flex-wrap:wrap;gap:4px;justify-content:flex-end}.learn_examFooter__i4cD_{display:flex;flex-direction:column;gap:10px;padding-top:8px;border-top:1px solid var(--border)}.learn_examFooterMeta__qfAsL{font-size:12px;color:var(--text-secondary);margin:0}.learn_examFooterPool__9PNEj{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.learn_examFooterPoolLabel__ig_Hy{font-size:11px;color:var(--text-tertiary)}.learn_examBtnPrimary__JzK2e,.learn_examBtnSecondary__fj0UQ{font-size:12px;font-weight:600;padding:8px 14px;border-radius:6px;cursor:pointer;font-family:inherit;align-self:flex-start}.learn_examBtnPrimary__JzK2e{background:var(--blue);color:#fff;border:1px solid var(--blue)}.learn_examBtnPrimary__JzK2e:hover:not(:disabled){filter:brightness(1.06)}.learn_examBtnPrimary__JzK2e:disabled{opacity:.45;cursor:not-allowed}.learn_examBtnSecondary__fj0UQ{background:transparent;color:var(--text);border:1px solid var(--border)}.learn_examBtnSecondary__fj0UQ:hover{border-color:var(--text-tertiary)}.learn_examSliders__Q1_Ia{display:flex;flex-direction:column;gap:16px;margin-bottom:14px}.learn_examSliderBlock__bKKo_{display:flex;flex-direction:column;gap:6px}.learn_examSliderHead__EWMff{display:flex;justify-content:space-between;align-items:baseline;gap:8px}.learn_examSliderLabel__uPZQs{font-size:13px;font-weight:500;color:var(--text)}.learn_examSliderValue__BmaOe{font-size:11px;font-family:IBM Plex Mono,monospace;color:var(--text-secondary)}.learn_examRange__qqjju{width:100%;accent-color:var(--blue)}.learn_examRange__qqjju:disabled{opacity:.35}.learn_examPreview__fgWOS{font-size:12px;color:var(--text-secondary);margin:0 0 12px;font-family:IBM Plex Mono,monospace}.learn_examActions__VJpbt{display:flex;gap:8px;flex-wrap:wrap}.learn_examHint__xkDyp{font-size:12px;color:var(--amber);margin:0 0 12px}.learn_examSoonNote__ENti3{font-size:11px;color:var(--text-tertiary);margin:10px 0 0}.learn_examRunner__ESQpU{width:100%;max-width:760px;margin-inline:auto}.learn_examQuestionHeader__xnb2K{margin-bottom:16px}.learn_examQuestionHeaderMain__sPVww{display:flex;flex-direction:column;gap:8px}.learn_examQuestionTitle__tNIKm{margin:0;font-size:20px;font-weight:600;color:var(--text-primary);letter-spacing:-.02em;line-height:1.25}.learn_examQuestionHeaderBadges__YK6EJ{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.learn_examQuestionPoints__ziDWg{font-size:12px;font-weight:600;color:var(--text-secondary);font-family:IBM Plex Mono,monospace}.learn_examReviewStatus__Lg_yG{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;padding:3px 8px;border-radius:4px;font-family:IBM Plex Mono,monospace}.learn_examReviewStatus_correct__qJoX0{color:var(--green);background:color-mix(in srgb,var(--green) 12%,transparent)}.learn_examReviewStatus_incorrect__SIISS{color:var(--amber);background:color-mix(in srgb,var(--amber) 12%,transparent)}.learn_examReviewStatus_pending__aqAyE{color:var(--text-tertiary);background:var(--bg);border:1px solid var(--border)}.learn_examReviewStatus_skipped__Se2bs{color:var(--text-secondary);background:var(--bg);border:1px dashed var(--border)}.learn_examResultsToolbar__GKKYm{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:16px 0 4px}.learn_examResultsFilterBtn__swJyl{padding:6px 12px;border-radius:6px;font-size:12px;font-weight:500;font-family:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);transition:background .12s,color .12s,border-color .12s}.learn_examResultsFilterBtnActive__O_zMi{border-color:var(--blue);background:color-mix(in srgb,var(--blue) 10%,transparent);color:var(--blue)}.learn_examResultsRowCollapsed__z6tOZ .learn_examGradePanel__izA9S,.learn_examResultsRowCollapsed__z6tOZ .learn_examResultQuestion__PHET_,.learn_examResultsRowCollapsed__z6tOZ .learn_examResultsExplanation___XpFW,.learn_examResultsRowCollapsed__z6tOZ .learn_examResultsFeedback__a4oDq{display:none}.learn_examResultsToggle__femTL{margin-left:auto;padding:4px 10px;border:none;background:none;font-size:12px;font-weight:500;color:var(--blue);cursor:pointer;font-family:inherit}.learn_examResultsRowTitleLarge__9suN3{font-size:15px;font-weight:600;color:var(--text-primary)}.learn_examScoreHeroBand__xQUuK{margin:4px 0 0;font-size:14px;font-weight:500;color:var(--text-secondary)}.learn_examGradingRowNote__3BPl0{margin:10px 0 0;padding:10px 12px;border-radius:6px;font-size:13px;color:var(--text-secondary);background:var(--bg);border:1px dashed var(--border);font-style:italic}.learn_examRunnerHead__fq1DE{display:flex;align-items:flex-start;justify-content:flex-end;gap:16px;margin-bottom:12px;flex-wrap:wrap}.learn_examRunnerMeta__Hm6Do{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.learn_examRunnerProgress__3GsPq{font-size:13px;font-weight:600;color:var(--text-primary);font-family:IBM Plex Mono,monospace}.learn_examRunnerPoints__Vou1Q{font-size:12px;color:var(--text-secondary);font-family:IBM Plex Mono,monospace}.learn_examRunnerTitle__snUC1{font-size:18px;font-weight:600;margin:0 0 8px;color:var(--text-primary)}.learn_examTimer__Y9hDh{display:flex;flex-direction:column;align-items:flex-end;padding:8px 12px;border-radius:8px;border:1px solid var(--border);background:var(--surface);min-width:72px}.learn_examTimerUrgent___pt_D{border-color:var(--amber);background:color-mix(in srgb,var(--amber) 12%,var(--surface))}.learn_examTimerLabel__3zB85{font-size:10px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary);font-family:IBM Plex Mono,monospace}.learn_examTimerValue__6pGkY{font-size:20px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--text-primary);font-family:IBM Plex Mono,monospace}.learn_examProgressTrack__QDE5j{height:4px;background:var(--border);border-radius:2px;margin-bottom:20px;overflow:hidden}.learn_examProgressFill__4LLfV{height:100%;background:var(--blue);border-radius:2px;transition:width .25s ease}.learn_examResults__LkUv0{width:100%;max-width:760px;margin-inline:auto}.learn_examScoreHero__I0mkH{display:flex;flex-wrap:wrap;gap:20px;align-items:stretch;justify-content:space-between;padding:20px 22px;border-radius:10px;border:1px solid var(--border);background:var(--surface);margin-bottom:12px}.learn_examScoreHeroMain__Gh1QU{min-width:180px}.learn_examScoreHeroLabel__fGzx_{margin:0 0 4px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-tertiary)}.learn_examScoreHeroValue__Ni2z_{margin:0;font-size:42px;font-weight:600;line-height:1.1;color:var(--text-primary);font-family:IBM Plex Mono,monospace}.learn_examScoreHeroSlash__SNmo_{margin:0 4px;color:var(--text-tertiary);font-weight:500}.learn_examScoreHeroPercent__hPxDO{margin:6px 0 0;font-size:15px;font-weight:600;color:var(--blue);font-family:IBM Plex Mono,monospace}.learn_examScoreHeroBreakdown___PVA5{display:flex;flex-direction:column;gap:10px;justify-content:center;min-width:200px}.learn_examScoreHeroStat__szYnm{display:flex;flex-direction:column;gap:2px}.learn_examScoreHeroStatLabel__5JPYw{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-tertiary)}.learn_examScoreHeroStatValue__9x0Du{font-size:14px;color:var(--text-secondary);font-family:IBM Plex Mono,monospace}.learn_examResultsRowTop__6T6F5{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap}.learn_examScoreBadge__ie1xm{display:inline-flex;align-items:baseline;gap:3px;padding:8px 14px;border-radius:8px;border:1px solid var(--border);font-family:IBM Plex Mono,monospace;flex-shrink:0}.learn_examScoreBadgeValue__SyG55{font-size:20px;font-weight:700;line-height:1}.learn_examScoreBadgeUnit__dmZmo{font-size:11px;font-weight:600;color:var(--text-tertiary);text-transform:uppercase}.learn_examScoreBadge_pass__1HFrM{border-color:var(--green-border,var(--border));background:color-mix(in srgb,var(--green) 10%,transparent);color:var(--green)}.learn_examScoreBadge_partial__n55vs{border-color:var(--amber-border,var(--border));background:color-mix(in srgb,var(--amber) 10%,transparent);color:var(--amber)}.learn_examScoreBadge_fail__N8_bE{border-color:var(--border);background:var(--bg);color:var(--text-secondary)}.learn_examScoreBadge_pending__8R2Ye{border-color:var(--border);background:var(--bg);color:var(--text-tertiary)}.learn_examGradePanel__izA9S{margin-top:14px;padding:14px 16px;border-radius:8px;border:1px solid var(--border);background:var(--bg);display:flex;flex-direction:column;gap:12px}.learn_examGradePanelHead__My4mQ{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.learn_examGradePanelLabel__S483g{margin:0;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-tertiary)}.learn_examGradeSummary__Rz6z4{margin:0;font-size:15px;line-height:1.55;font-weight:500;color:var(--text-primary)}.learn_examGradeBlock__mtrNs{display:flex;flex-direction:column;gap:6px}.learn_examGradeBlockTitle__iO7ez{margin:0;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-tertiary)}.learn_examGradeList__jMBij{margin:0;padding:0 0 0 18px;display:flex;flex-direction:column;gap:4px;font-size:13px;line-height:1.5;color:var(--text-secondary)}.learn_examGradeIssues__qbsAf{display:flex;flex-wrap:wrap;gap:6px}.learn_examGradeIssueTag__mkCNv{display:inline-block;padding:3px 8px;border-radius:4px;font-size:11px;font-weight:600;font-family:IBM Plex Mono,monospace;background:color-mix(in srgb,var(--amber) 12%,transparent);color:var(--amber);border:1px solid var(--amber-border,var(--border))}.learn_examGradeNext__wjKKt{padding-top:4px;border-top:1px dashed var(--border)}.learn_examGradeNextBody__O6OYA{margin:0;font-size:13px;line-height:1.55;color:var(--text-secondary)}.learn_examGradeDeduction__SXwWT{margin:0;font-size:12px;line-height:1.45;color:var(--text-tertiary);font-family:IBM Plex Mono,monospace}.learn_examResultBody__K2T0j{margin-top:10px;display:flex;flex-direction:column;gap:10px}.learn_examResultPrompt__WYgYv{margin:0;font-size:14px;line-height:1.55;color:var(--text-primary)}.learn_examResultOptions__SyQBW{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.learn_examResultOptionSelected__Ofseo,.learn_examResultOption__iotuK{padding:8px 10px;border-radius:6px;border:1px solid var(--border);font-size:13px;line-height:1.45;color:var(--text-secondary)}.learn_examResultOptionSelected__Ofseo{border-color:var(--blue);background:color-mix(in srgb,var(--blue) 8%,transparent);color:var(--text-primary)}.learn_examResultMetaList__Utcsf{margin:0;padding:0 0 0 16px;font-size:13px;line-height:1.5;color:var(--text-secondary)}.learn_examResultNote__mTNZn{margin:0;font-size:12px;font-weight:600;color:var(--text-tertiary);font-family:IBM Plex Mono,monospace}.learn_examResultHintBox__8xDby{border:1px dashed var(--border);border-radius:6px;padding:10px 12px;display:flex;flex-direction:column;gap:8px}.learn_examResultHintItem__22_Iq{margin:0;font-size:13px;line-height:1.5;color:var(--text-secondary)}.learn_examResultBlockList__I4tHW{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.learn_examResultBlock__S4BbY{display:flex;gap:8px;align-items:flex-start;border:1px solid var(--border);border-radius:6px;padding:8px 10px;background:var(--bg)}.learn_examResultBlockNum__gXuk9{flex-shrink:0;font-size:11px;font-weight:600;color:var(--text-tertiary);font-family:IBM Plex Mono,monospace;min-width:1.25rem}.learn_examResultBlockCode__q7z2m{margin:0;font-size:12px;line-height:1.45;font-family:IBM Plex Mono,monospace;color:var(--text-primary);white-space:pre-wrap;overflow-x:auto}.learn_examResultsHero__IWvSo{font-size:28px;font-weight:600;margin:0 0 8px;color:var(--text-primary);font-family:IBM Plex Mono,monospace}.learn_examResultsList__Irgr2{list-style:none;margin:20px 0 0;padding:0;display:flex;flex-direction:column;gap:10px}.learn_examResultsRow__UUwtG{border:1px solid var(--border);border-radius:8px;padding:16px 18px;background:var(--surface)}.learn_examResultsRowHead__Z_GmU{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:0}.learn_examResultsRowTitle__Zb88q{font-size:13px;font-weight:600;color:var(--text-primary);font-family:IBM Plex Mono,monospace}.learn_examResultsRowPoints__4WYYk{font-size:12px;color:var(--text-secondary);font-family:IBM Plex Mono,monospace}.learn_examResultQuestion__PHET_{margin-top:12px}.learn_examResultsRowMeta__EwOaW{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}.learn_examResultsRowScore__SXzKr{font-size:13px;color:var(--text-secondary);font-family:IBM Plex Mono,monospace}.learn_examResultsRowTime__j24x_{font-size:12px;color:var(--text-tertiary);font-family:IBM Plex Mono,monospace}.learn_examResultsFeedback__a4oDq{margin:12px 0 0;padding:12px 14px;border-radius:8px;border:1px solid var(--border);background:var(--bg);font-size:13px;line-height:1.55;color:var(--text-secondary);white-space:pre-wrap}.learn_examResultsExplanation___XpFW{margin-top:10px;padding-top:10px;border-top:1px solid var(--border)}.learn_examResultsExplanationLabel__moXFW{margin:0 0 4px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-tertiary)}.learn_examResultsExplanationBody__aoIEq{margin:0;font-size:13px;line-height:1.55;color:var(--text-secondary);white-space:pre-wrap}.learn_examResultsExplanationList__DeYep{margin:0;padding:0 0 0 16px;display:flex;flex-direction:column;gap:6px}.learn_examResultsExplanationPrefix__aO821{color:var(--text-primary)}.learn_examHistory__JqY8P{width:100%;max-width:760px;margin-inline:auto}.learn_examHistoryList__EV2eY{list-style:none;margin:16px 0 0;padding:0;display:flex;flex-direction:column;gap:10px}.learn_examHistoryRow__9Z_JP{border:1px solid var(--border);border-radius:8px;padding:12px 14px;background:var(--surface)}.learn_examHistoryRowHead__qiL_e{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}.learn_examHistoryLink__Q8q5t{font-size:14px;font-weight:600;color:var(--blue);text-decoration:none;font-family:IBM Plex Mono,monospace}.learn_examHistoryLink__Q8q5t:hover{text-decoration:underline}.learn_examHistoryMeta__UIc8W{margin:6px 0 0;font-size:13px;color:var(--text-secondary)}.learn_examGradingBanner__YOBnn{font-size:13px;color:var(--blue);margin:0 0 16px;padding:10px 12px;border-radius:8px;border:1px solid color-mix(in srgb,var(--blue) 35%,var(--border));background:color-mix(in srgb,var(--blue) 8%,var(--surface));font-family:IBM Plex Mono,monospace}@media (max-width:767px){.learn_examSteps__f_92V{gap:8px}.learn_examStepTab__rDeUL{flex:1;min-height:44px;padding:10px 12px;font-size:13px}.learn_examPickerRow__j74_Z{grid-template-columns:auto 24px 1fr;grid-template-rows:auto auto;align-items:start;gap:8px 10px;padding:12px}.learn_examPickerRow__j74_Z .learn_examCheckbox__5SZ9s{grid-column:1;grid-row:1;width:18px;height:18px;align-self:center}.learn_examPickerIndex__nP66S{grid-column:2;grid-row:1;align-self:center}.learn_examPickerTitle__8dnrG{grid-column:3;grid-row:1;font-size:14px;line-height:1.35}.learn_examPickerRow__j74_Z .learn_examBadges__LCKD9{grid-column:1/-1;grid-row:2;justify-content:flex-start}.learn_examBtnPrimary__JzK2e,.learn_examBtnSecondary__fj0UQ{width:100%;min-height:44px;padding:10px 16px;font-size:13px;align-self:stretch;display:inline-flex;align-items:center;justify-content:center;box-sizing:border-box;text-decoration:none}.learn_examActions__VJpbt{flex-direction:column;gap:10px}.learn_examResultsToolbar__GKKYm{gap:8px}.learn_examResultsFilterBtn__swJyl{flex:1;min-height:44px;padding:10px 12px;font-size:13px}.learn_examResultsToggle__femTL{margin-left:0;min-height:44px;padding:10px 12px;width:100%;text-align:left}.learn_examRunnerHead__fq1DE{flex-direction:column;align-items:stretch;gap:10px}.learn_examTimer__Y9hDh{align-items:flex-start;width:100%;box-sizing:border-box}.learn_examQuestionTitle__tNIKm{font-size:17px}.learn_examScoreHero__I0mkH{padding:16px;gap:14px}.learn_examScoreHeroValue__Ni2z_{font-size:34px}.learn_examScoreHeroBreakdown___PVA5{min-width:0;width:100%}.learn_examResultsRow__UUwtG{padding:12px 14px}.learn_examResultsRowTop__6T6F5{flex-direction:column;align-items:stretch;gap:10px}.learn_examHistoryRow__9Z_JP{padding:12px}.learn_examHistoryLink__Q8q5t{min-height:44px;display:inline-flex;align-items:center}}.learn_sidebar__nRjLt{position:relative}.learn_sidebarCollapseBtn__H1PnW{position:absolute;top:12px;right:8px;z-index:2;width:28px;height:28px;border:1px solid var(--side-border);border-radius:6px;background:var(--side-2,var(--side));color:var(--text-secondary);font-size:16px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0}.learn_sidebarCollapseBtn__H1PnW:hover{color:var(--text);background:var(--side-3,var(--side))}.learn_sidebarCollapsed__oFNZt .learn_sidebarCollapseBtn__H1PnW{display:none}.learn_dashboardLink__X0wam{font-size:11px;font-weight:500;color:var(--text-secondary);text-decoration:none;padding:4px 6px;border-radius:4px}.learn_dashboardLink__X0wam:hover{color:var(--text);background:var(--side-2,rgba(255,255,255,.04))}.learn_sidebarCollapsed__oFNZt .learn_dashboardLink__X0wam{display:none}.learn_listFilters__B9v1S{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}.learn_listFilterLabel__W5P6d{font-size:12px;font-weight:500;color:var(--text-secondary)}.learn_listFilterSelect__kWA04{min-width:160px;max-width:100%;padding:8px 10px;font-size:13px;font-family:inherit;border-radius:6px;border:1px solid var(--border);background:var(--surface);color:var(--text)}.learn_langHubCardMetaMuted__TMS5s{font-size:11px;color:var(--text-tertiary);margin-top:auto}.learn_langHubCardDisabled__iFgno{opacity:.55;cursor:not-allowed;pointer-events:none}@media (max-width:767px){.learn_listFilterSelect__kWA04{flex:1;min-height:44px}}.tutorial_detailHero__QuReV{background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden;margin-bottom:16px}.tutorial_heroHead__trZIn{padding:18px 20px}.tutorial_heroBadges__CmzNp{display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap}.tutorial_heroTitle__UV0Cl{font-size:20px;font-weight:600;color:var(--text);letter-spacing:-.02em;margin:0 0 6px}.tutorial_heroDesc__hGPyn{font-size:13px;color:var(--text-secondary);line-height:1.65;max-width:560px;margin:0}.tutorial_detailBody__ZSJFn{display:flex;gap:16px;align-items:flex-start}.tutorial_detailMain__0WLoV{flex:1;min-width:0}.tutorial_detailMeta__nAVor{width:210px;flex-shrink:0;display:flex;flex-direction:column;gap:10px}@media (max-width:900px){.tutorial_detailBody__ZSJFn{flex-direction:column}.tutorial_detailMeta__nAVor{width:100%}}.tutorial_card__BvBxD{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:16px}.tutorial_cardSpaced__7Tdwi{margin-bottom:8px}.tutorial_cardCompact__3BaXT{padding:11px 13px}.tutorial_cardLabel__J2zFx{font-size:10px;font-weight:500;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.07em;margin:0 0 10px}.tutorial_badge__xtobm{display:inline-flex;align-items:center;font-size:11px;font-weight:500;padding:2px 7px;border-radius:4px;line-height:1.5}.tutorial_badge_blue__XqbiF{background:var(--blue-bg);color:var(--blue);border:1px solid var(--blue-border)}.tutorial_badge_green__Iu5QL{background:var(--green-bg);color:var(--green);border:1px solid var(--green-border)}.tutorial_badge_red__MMtYi{background:var(--red-bg);color:var(--red);border:1px solid var(--red-border)}.tutorial_badge_amber__XBjmP{background:var(--amber-bg);color:var(--amber);border:1px solid var(--amber-border)}.tutorial_badge_gray__kP_D1{background:var(--bg);color:var(--text-secondary);border:1px solid var(--border)}.tutorial_tabs__7170P{display:flex;border-top:1px solid var(--border);overflow-x:auto}.tutorial_tabBtn__fQ21q{padding:10px 14px;font-size:12px;font-weight:400;color:var(--text-secondary);cursor:pointer;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;background:none;font-family:inherit;white-space:nowrap;transition:color .15s,border-color .15s}.tutorial_tabBtn__fQ21q:hover{color:var(--text)}.tutorial_tabBtnActive__kQ7aY{color:var(--blue);font-weight:500;border-bottom-color:var(--blue)}.tutorial_tabPanel__d66FR{animation:tutorial_fadeUp___9orI .2s ease}@keyframes tutorial_fadeUp___9orI{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}.tutorial_introText__GiQTl{font-size:13px;color:var(--text-secondary);line-height:1.8;margin:0}.tutorial_sectionLabel__5UiUZ{font-size:10px;font-weight:500;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.07em;margin:16px 0 9px}.tutorial_topicsWrap__wsSQG{margin-top:2px}.tutorial_topicBadges__tot38{display:flex;flex-wrap:wrap;gap:6px}.tutorial_emptyTab__R6cxS{font-size:13px;color:var(--text-secondary);margin:0}.tutorial_kpRow__16KKv{display:flex;gap:11px;align-items:flex-start}.tutorial_kpNum__oFann{width:20px;height:20px;background:var(--blue-bg);border:1px solid var(--blue-border);border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:500;color:var(--blue);flex-shrink:0}.tutorial_kpInline__a0CrL,.tutorial_kpText__UMBy4{font-size:13px;color:var(--text-secondary);line-height:1.65;margin:0}.tutorial_exampleCard__gBdaS{background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden;margin-bottom:14px}.tutorial_exampleHead__hTfbC{padding:12px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.tutorial_exampleTitle__mgrdN{font-size:13px;font-weight:500;color:var(--text);margin:0}.tutorial_exampleDesc__JgFRG{font-size:11px;color:var(--text-secondary);margin:2px 0 0}.tutorial_exampleBody__VbIGt{padding:14px}.tutorial_exampleExplanation__gkq7m{font-size:13px;color:var(--text-secondary);line-height:1.65;margin:10px 0 0}.tutorial_outputBox__uaZjC{background:var(--code-bg);border-radius:6px;padding:9px 13px;margin-top:10px}.tutorial_outputLabel__NGZmX{font-size:10px;font-weight:500;color:#8b949e;text-transform:uppercase;letter-spacing:.06em;margin:0 0 4px}.tutorial_outputPre__cuyky{color:var(--green);margin:0;font-family:IBM Plex Mono,monospace;font-size:13px}.tutorial_syntaxParam__hxSbk{background:var(--surface);border:1px solid var(--border);border-radius:7px;padding:11px 14px;display:flex;gap:12px;align-items:flex-start;margin-bottom:8px;flex-wrap:wrap}.tutorial_paramName__3msyM{font-size:11px;color:var(--blue);background:var(--blue-bg);border:1px solid var(--blue-border);padding:2px 7px;border-radius:4px;font-family:IBM Plex Mono,monospace}.tutorial_paramDesc__zbqcv{font-size:13px;color:var(--text-secondary);flex:1;margin:0;min-width:120px}.tutorial_mistakeCard__ykRI1{background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden;margin-bottom:10px}.tutorial_mistakeHead__yOap7{padding:10px 14px;border-bottom:1px solid var(--red-border);background:var(--red-bg)}.tutorial_mistakeHead__yOap7 span{font-size:13px;font-weight:500;color:var(--red)}.tutorial_mistakeBody__yqLjo{padding:14px}.tutorial_mistakeLabelMuted__FUbTL{color:var(--text-tertiary)}.tutorial_mistakeLabelMuted__FUbTL,.tutorial_mistakeLabelOk__3T89M{font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:.07em;margin:0 0 4px}.tutorial_mistakeLabelOk__3T89M{color:var(--green)}.tutorial_mistakeText__dW8G7{font-size:13px;color:var(--text-secondary);line-height:1.65;margin:0 0 10px}.tutorial_mistakeDivider__q1jLA{border-top:1px solid var(--border);padding-top:9px}.tutorial_objRow__zzbU5{display:flex;gap:7px;align-items:flex-start;margin-bottom:7px}.tutorial_objCheck___IYhl{width:14px;height:14px;background:var(--blue-bg);border:1px solid var(--blue-border);border-radius:3px;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}.tutorial_objText__9AZIn{font-size:11px;color:var(--text-secondary);line-height:1.55;margin:0}.tutorial_startBtn__R_CGl{width:100%;background:var(--blue);color:#fff;font-size:13px;padding:9px;border-radius:6px;border:none;cursor:pointer;font-weight:500;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;transition:background .15s}.tutorial_startBtn__R_CGl:hover{background:var(--blue-hover)}.tutorial_startBtnDisabled__Pjf5H{opacity:.45;cursor:not-allowed;pointer-events:none}.tutorial_exercisesBtn__pA0Kg{width:100%;margin-top:8px;background:var(--surface);color:var(--text-secondary);font-size:12px;padding:8px 9px;border-radius:6px;border:1px solid var(--border);cursor:pointer;font-weight:500;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;transition:background .15s,color .15s,border-color .15s}.tutorial_exercisesBtn__pA0Kg:hover{background:var(--surface-2,var(--surface));color:var(--text);border-color:var(--border-strong,var(--border))}.tutorial_lockedBanner__KuIJR{background:var(--amber-bg);border:1px solid var(--amber-border);border-radius:8px;padding:12px 16px;margin-bottom:16px}.tutorial_lockedTitle__VcW1P{font-size:13px;font-weight:600;color:var(--amber);margin:0 0 4px}.tutorial_lockedText__i6PGx{font-size:12px;color:var(--text-secondary);margin:0 0 10px;line-height:1.55}.tutorial_lockedCta__sVMZT{display:inline-flex;align-items:center;padding:6px 12px;border-radius:6px;background:var(--amber,#9a6700);color:#fff;font-size:12px;font-weight:600;text-decoration:none}.tutorial_lockedCta__sVMZT:hover{filter:brightness(1.05)}.tutorial_lessonGate__9yFuY{margin:2rem 0;padding:1.25rem 1.5rem;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text-secondary);font-size:14px;line-height:1.5}.tutorial_lessonGateLink__PZzwi{color:var(--blue);font-weight:500}.tutorial_lessonGateLink__PZzwi:hover{text-decoration:underline}.tutorial_codeBlock__JEx1v{border-radius:7px;overflow:hidden;background:var(--code-bg);max-width:100%;min-width:0}.tutorial_codeHeader__BD7n6{padding:7px 13px;border-bottom:1px solid rgba(255,255,255,.07);display:flex;justify-content:space-between;align-items:center}.tutorial_trafficLights__dpJPo{display:flex;gap:5px}.tutorial_tlGreen__aWM_m,.tutorial_tlRed__WoHoF,.tutorial_tlYellow__iyfRR{width:9px;height:9px;border-radius:50%;opacity:.85}.tutorial_tlRed__WoHoF{background:#ff5f57}.tutorial_tlYellow__iyfRR{background:#febc2e}.tutorial_tlGreen__aWM_m{background:#28c840}.tutorial_copyBtn__37KJK{font-size:11px;color:#8b949e;background:none;border:none;cursor:pointer;font-family:inherit}.tutorial_copyBtn__37KJK:hover{color:#e6edf3}.tutorial_codePre__QFWM7{padding:13px 15px;font-size:13px;line-height:1.7;color:var(--code-text);overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0;font-family:IBM Plex Mono,monospace;white-space:pre;max-width:100%}.tutorial_lessonPageCenter___p5vw{flex:1;overflow-y:auto;padding:22px 24px;display:flex;flex-direction:column;align-items:center;width:100%;box-sizing:border-box}.tutorial_lessonContainer__U_xWp{max-width:720px;width:100%;margin:0 auto}.tutorial_monacoWrap__DPbbi{border-top:1px solid var(--border);overflow:hidden}.tutorial_monacoWrap__DPbbi .monaco-editor,.tutorial_monacoWrap__DPbbi .monaco-editor-background{background:var(--code-bg)!important}.tutorial_lessonTitle__ktR9z{font-size:18px;font-weight:600;color:var(--text);letter-spacing:-.02em;margin:0 0 18px}.tutorial_progressWrap__gk_NY{display:flex;align-items:center;gap:7px;flex-wrap:wrap}.tutorial_progressTrack__7Px9S{width:88px;height:4px;background:var(--border);border-radius:2px;overflow:hidden}.tutorial_progressFill__YPmi8{height:100%;background:var(--blue);border-radius:2px;transition:width .3s}.tutorial_progressLabel__qn8Gq{font-size:11px;color:var(--text-tertiary)}.tutorial_topbarStart__Tn8nA{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;font-size:12px;font-weight:500;background:var(--blue);color:#fff;border-radius:6px;text-decoration:none;border:none;font-family:inherit}.tutorial_topbarStart__Tn8nA:hover{background:var(--blue-hover)}.tutorial_topbarStartShort__qze_2{display:none}@media (max-width:767px){.tutorial_progressWrap__gk_NY{width:100%;gap:6px}.tutorial_progressTrack__7Px9S{flex:1;min-width:72px;max-width:140px}.tutorial_topbarStart__Tn8nA{padding:6px 12px;font-size:11px}.tutorial_topbarStartFull__p_ApE{display:none}.tutorial_topbarStartShort__qze_2{display:inline}}.tutorial_conceptExplanation__1m_nB{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:18px;margin-bottom:16px}.tutorial_conceptExplanation__1m_nB p{font-size:13px;color:var(--text-secondary);line-height:1.8;margin:0}.tutorial_keyPointsList__64OQ0{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.tutorial_exampleFold__Ve4mT{margin-bottom:10px;padding:0;overflow:hidden}.tutorial_exampleToggle__H2bnH{width:100%;background:none;border:none;padding:11px 14px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-family:inherit;color:var(--text);font-size:13px;font-weight:500}.tutorial_exampleFoldBody__WKNhr{padding:0 14px 14px}.tutorial_bestMistakesGrid__1lWfG{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px}@media (max-width:640px){.tutorial_bestMistakesGrid__1lWfG{grid-template-columns:1fr}}.tutorial_bmCard__QDabb{border-radius:8px;padding:14px}.tutorial_bmGreen__RaN5z{border:1px solid var(--green-border);background:var(--surface)}.tutorial_bmRed__RxZaA{border:1px solid var(--red-border);background:var(--surface)}.tutorial_bmLabel__AX7Kl{font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:.07em;margin:0 0 8px}.tutorial_bmLabelGreen__jcbRa{color:var(--green)}.tutorial_bmLabelRed__1iKk9{color:var(--red)}.tutorial_bmItem__vPqpY{font-size:12px;color:var(--text-secondary);line-height:1.55;padding-left:8px;border-left:2px solid;margin:0 0 6px}.tutorial_bmItemGreen__ZJos3{border-left-color:var(--green-border)}.tutorial_bmItemRed__AzFNM{border-left-color:var(--red-border)}.tutorial_mcqProgress__fNYWg{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;gap:12px;flex-wrap:wrap}.tutorial_mcqDots__GgN9_{display:flex;gap:4px;flex-wrap:wrap}.tutorial_mcqDot__Dz5zC{width:26px;height:5px;border-radius:3px;border:none;cursor:pointer;padding:0}.tutorial_mcqDotPending__fEC9g{background:var(--border)}.tutorial_mcqDotCurrent__J_V_G{background:var(--blue)}.tutorial_mcqDotCorrect__TFcAf{background:var(--green)}.tutorial_mcqDotWrong__K_Isd{background:var(--red)}.tutorial_mcqScore__RQlHS{font-size:18px;font-weight:600;color:var(--text);font-family:IBM Plex Mono,monospace}.tutorial_mcqScoreDenom__ihD0B{font-size:12px;color:var(--text-tertiary)}.tutorial_questionCard__R6EWq{background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden}.tutorial_questionHead__rWhnA{padding:11px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--text-tertiary)}.tutorial_questionBody__8goJt{padding:16px}.tutorial_questionText__9daef{font-size:14px;font-weight:500;color:var(--text);line-height:1.65;margin:0 0 14px}.tutorial_optionBtn__7Rm6u{width:100%;padding:10px 13px;background:var(--surface);border:1px solid var(--border);border-radius:6px;color:var(--text);font-size:13px;display:flex;gap:9px;align-items:flex-start;cursor:pointer;font-family:inherit;margin-bottom:7px;text-align:left;transition:background .15s,border-color .15s}.tutorial_optionBtn__7Rm6u:hover:not(:disabled){background:var(--bg)}.tutorial_optionCorrect__wBBcc{background:var(--green-bg);border-color:var(--green);color:var(--green)}.tutorial_optionWrong__y5wG2{background:var(--red-bg);border-color:var(--red);color:var(--red)}.tutorial_optionDimmed__A8nPi{color:var(--text-secondary)}.tutorial_optionSelected___D379{border-color:var(--blue);background:color-mix(in srgb,var(--blue) 8%,transparent)}.tutorial_optReviewMark__214Sl{margin-left:auto;font-weight:700;font-size:12px;flex-shrink:0}.tutorial_examQuestionStem__kcavd{font-size:17px;font-weight:600;color:var(--text);line-height:1.55;margin:0 0 16px;letter-spacing:-.01em}.tutorial_examSkippedNote__S4rA1{margin:0 0 12px;padding:8px 12px;border-radius:6px;font-size:13px;color:var(--text-secondary);background:var(--bg);border:1px dashed var(--border)}.tutorial_rearrangeReviewBar__OC7XB{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}.tutorial_rearrangeReviewSummary__K_mKr{margin:0;font-size:13px;font-weight:500;color:var(--text-secondary)}.tutorial_optLetter__ruwQK{width:22px;height:22px;border-radius:5px;border:1px solid;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:500;flex-shrink:0}.tutorial_optText__aMM8b{font-family:IBM Plex Mono,monospace;font-size:12px;line-height:1.5;white-space:pre-wrap}.tutorial_explanationBox__dChGg{margin-top:12px;padding:13px;border-radius:6px;font-size:12px;line-height:1.65}.tutorial_explanationCorrect__opZsF{background:var(--green-bg);border:1px solid var(--green-border);color:var(--text-secondary)}.tutorial_explanationWrong__3tCnC{background:var(--amber-bg);border:1px solid var(--amber-border);color:var(--text-secondary)}.tutorial_expLabel__PWbUP{font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:.07em;margin:0 0 4px}.tutorial_expLabelOk__Xejrk{color:var(--green)}.tutorial_expLabelWarn__Qfbsg{color:var(--amber)}.tutorial_questionFoot__o7PiG{padding:10px 16px;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:8px}.tutorial_navBtn__z1ajM{padding:5px 12px;border-radius:5px;font-size:12px;font-weight:500;cursor:pointer;font-family:inherit}.tutorial_navBtnPrev__n_aeo{background:var(--surface);border:1px solid var(--border);color:var(--text-secondary)}.tutorial_navBtnPrev__n_aeo:disabled{opacity:.3;cursor:not-allowed}.tutorial_navBtnNext__2NRkC{background:var(--blue);color:#fff;border:none}.tutorial_navBtnNext__2NRkC:disabled{background:var(--bg);color:var(--text-secondary);border:1px solid var(--border);cursor:not-allowed}.tutorial_scenarioBox__I5X2f{background:var(--amber-bg);border:1px solid var(--amber-border);border-radius:7px;padding:11px 13px;margin-bottom:14px;font-size:12px;color:var(--amber)}.tutorial_scenarioBlue__HXBGl{background:var(--blue-bg);border-color:var(--blue-border);color:var(--blue)}.tutorial_hintLine__7r13O{font-size:11px;color:var(--text-tertiary);margin:0 0 11px}.tutorial_dragList__kYWrv{display:flex;flex-direction:column;gap:5px;margin-bottom:14px}.tutorial_dragItem__uvwik{display:flex;align-items:stretch;border-radius:7px;border:1px solid var(--border);background:var(--surface);overflow:hidden}.tutorial_dragCorrect__qf0_X{background:var(--green-bg);border-color:var(--green)}.tutorial_dragWrong__80c_D{background:var(--red-bg);border-color:var(--red)}.tutorial_dragControls__lbsjq{width:34px;background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:4px 0;border-right:1px solid var(--border);flex-shrink:0}.tutorial_dragBtn__LDHge{background:none;border:none;cursor:pointer;font-size:10px;color:var(--text-tertiary);padding:2px;line-height:1}.tutorial_dragBtn__LDHge:hover:not(:disabled){color:var(--text)}.tutorial_dragBtn__LDHge:disabled{opacity:.2;cursor:not-allowed}.tutorial_dragNum__9Rbf0{font-size:9px;font-weight:500;color:var(--text-secondary);font-family:IBM Plex Mono,monospace}.tutorial_dragCode__ljMCW{flex:1;padding:10px 13px;font-size:13px;font-family:IBM Plex Mono,monospace;line-height:1.55;color:var(--text);margin:0;white-space:pre-wrap;background:transparent}.tutorial_dragHandle__izrSu{width:28px;display:flex;align-items:center;justify-content:center;color:var(--text-tertiary);font-size:12px;background:var(--bg);flex-shrink:0;cursor:grab;border:none;border-left:1px solid var(--border);border-radius:0;font-family:inherit;padding:0;touch-action:none;transition:color .12s,background .12s}.tutorial_dragHandle__izrSu:hover{color:var(--text-secondary);background:var(--surface)}.tutorial_dragHandle__izrSu:active{cursor:grabbing}.tutorial_dragHandle__izrSu:focus-visible{outline:2px solid var(--blue);outline-offset:-2px}.tutorial_dragItemDragging__ojoz0{opacity:.55}.tutorial_dragItemOver__ySnMi{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue-border)}.tutorial_actionRow__wy_4F{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px}.tutorial_actBtn__t8IfP{padding:7px 14px;border-radius:6px;font-size:12px;font-weight:500;cursor:pointer;font-family:inherit;border:none}.tutorial_actPrimary__hL13g{background:var(--blue);color:#fff}.tutorial_actSecondary__YB46r{background:var(--surface);border:1px solid var(--border);color:var(--text-secondary)}.tutorial_actHint___gTgN{background:var(--surface);border:1px solid var(--amber-border);color:var(--amber)}.tutorial_hintBox__4FJMq{background:var(--amber-bg);border:1px solid var(--amber-border);border-radius:7px;padding:13px;margin-bottom:12px}.tutorial_hintItem__JVzsM{font-size:12px;color:var(--text-secondary);margin:0 0 3px}.tutorial_resultBox__wJFd4{padding:14px;border-radius:8px;margin-bottom:12px}.tutorial_resultSuccess__dbSMe{background:var(--green-bg);border:1px solid var(--green-border)}.tutorial_resultFail___uN3T{background:var(--red-bg);border:1px solid var(--red-border)}.tutorial_resultTitle__x4Qp6{font-size:13px;font-weight:500;margin:0 0 10px}.tutorial_resultTitleOk__CtFI0{color:var(--green)}.tutorial_resultTitleFail__PUsIR{color:var(--red)}.tutorial_resultSubtext__UoWY6{font-size:12px;color:var(--text-secondary);margin:5px 0 0}.tutorial_fillEditor__XwV8e{border-radius:8px;overflow:hidden;margin-bottom:14px}.tutorial_fillHeader__wL2L3{padding:7px 13px;background:#1e2a3a;border-bottom:1px solid rgba(255,255,255,.07);display:flex;justify-content:space-between;align-items:center}.tutorial_fillFilename__CrF1k{font-size:11px;color:#8b949e;font-family:IBM Plex Mono,monospace}.tutorial_fillBody__xsYSE{background:var(--code-bg);padding:15px 14px;font-size:13px;font-family:IBM Plex Mono,monospace;line-height:2.2;color:var(--code-text);white-space:pre-wrap}.tutorial_blankInput__1_sTO,.tutorial_blankSelect__E65F3{background:var(--surface);border:1.5px solid var(--blue);border-radius:4px;color:var(--blue);font-family:IBM Plex Mono,monospace;font-size:13px;padding:1px 6px;outline:none;margin:0 2px}.tutorial_blankInput__1_sTO:focus,.tutorial_blankSelect__E65F3:focus{box-shadow:0 0 0 3px rgba(9,105,218,.15)}.tutorial_blankOk__ncpoK{border-color:var(--green);color:var(--green)}.tutorial_blankErr__KsVSn{border-color:var(--red);color:var(--red)}.tutorial_feedbackRow__h1gaL{display:flex;flex-direction:column;gap:5px;margin-bottom:12px}.tutorial_fbRow__LLVIt{padding:9px 12px;border-radius:7px;display:flex;gap:8px;align-items:flex-start}.tutorial_fbOk__W_a10{background:var(--green-bg);border:1px solid var(--green-border)}.tutorial_fbErr__8hZYl{background:var(--red-bg);border:1px solid var(--red-border)}.tutorial_fbIconOk__fDzaR{color:var(--green)}.tutorial_fbIconErr__0d1aK{color:var(--red)}.tutorial_fbLabel__764C4{font-size:12px;color:var(--text-secondary)}.tutorial_fbCorrect__qEZ8o{font-size:11px;color:var(--blue);background:var(--blue-bg);border:1px solid var(--blue-border);padding:1px 5px;border-radius:3px;font-family:IBM Plex Mono,monospace}.tutorial_fbExplanation__7ykBc{font-size:11px;color:var(--text-secondary);margin:2px 0 0;line-height:1.55}.tutorial_lessonFooter__Hmmex{display:flex;justify-content:space-between;margin-top:28px;padding-top:18px;border-top:1px solid var(--border);gap:10px;flex-wrap:wrap}.tutorial_lfBtn__QwHIm{padding:8px 14px;border-radius:6px;font-size:12px;font-weight:500;display:inline-flex;align-items:center;gap:6px;text-decoration:none;font-family:inherit;transition:all .15s;border:none;cursor:pointer}.tutorial_lfBtnPrev__X9V4u{background:var(--surface);border:1px solid var(--border);color:var(--text-secondary)}.tutorial_lfBtnNext__U01Yj{background:var(--blue);color:#fff}.tutorial_lfBtnComplete__F6re5{background:var(--green);color:#fff}.tutorial_lfBtnExercises__ft568{flex:1 1 100%;justify-content:center;background:transparent;border:1px dashed var(--border);color:var(--text-secondary)}.tutorial_lfBtnExercises__ft568:hover{background:var(--surface);color:var(--text);border-style:solid}.tutorial_lfBtnExercisesEmphasis__rKYam{background:var(--surface);border:1px solid var(--border);color:var(--text)}.tutorial_lfBtnExercisesEmphasis__rKYam:hover{border-color:var(--blue);color:var(--blue)}.tutorial_lessonFooterEnd__eNTYg{display:flex;flex-direction:column;align-items:flex-end;gap:8px;margin-left:auto}.tutorial_lfBtnDisabled__cYagz{opacity:.3;cursor:not-allowed}.tutorial_lfBtnTitleShort__tBE9c{display:none}@media (max-width:767px){.tutorial_lessonPageCenter___p5vw{padding:16px 12px}.tutorial_lessonFooter__Hmmex{margin-top:20px;padding-top:14px}.tutorial_lfBtn__QwHIm{min-height:44px;padding:10px 14px;flex:1;justify-content:center;max-width:calc(50% - 5px)}.tutorial_lfBtnTitleFull__T8ZZl{display:none}.tutorial_lfBtnTitleShort__tBE9c{display:inline}.tutorial_lfBtnComplete__F6re5{max-width:100%;flex:1 1 100%}.tutorial_dragControls__lbsjq{width:40px}.tutorial_dragBtn__LDHge{min-height:28px;min-width:28px;font-size:12px;padding:4px}.tutorial_dragHandle__izrSu{width:44px;min-height:44px}.tutorial_dragCode__ljMCW{font-size:12px;padding:10px;overflow-x:auto;-webkit-overflow-scrolling:touch}}.tutorial_notFound___8NgF{max-width:28rem;padding:3rem 0}.tutorial_notFoundTitle__lxX8g{font-size:1.5rem;font-weight:600;margin:0 0 .5rem;color:var(--text)}.tutorial_notFoundText__WXvLE{margin:0 0 1.25rem;color:var(--text-secondary);line-height:1.5}.tutorial_notFoundLink__vfzqq{color:var(--blue);text-decoration:none;font-weight:500}.tutorial_notFoundLink__vfzqq:hover{text-decoration:underline}.tutorial_questionBlock__Mlu1k{border:1px solid var(--border);border-radius:10px;padding:14px 16px 10px;margin-bottom:18px;background:var(--surface)}.tutorial_questionHeader__jaPCL{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.tutorial_questionLabel__5hrye{font-size:11px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.06em;font-family:IBM Plex Mono,monospace}.tutorial_qStatusOk__KmfGR{font-size:11px;font-weight:600;color:var(--green);background:var(--green-bg);border:1px solid var(--green-border);border-radius:4px;padding:2px 7px}.tutorial_qStatusErr__Y2gOr{font-size:11px;font-weight:600;color:var(--red);background:var(--red-bg);border:1px solid var(--red-border);border-radius:4px;padding:2px 7px}.tutorial_qHintsArea__z40Jh{margin-top:8px;display:flex;flex-direction:column;gap:6px}.tutorial_qSolutionArea__FYkaM{margin-top:8px}.tutorial_hintCount__7b3vQ{font-weight:400;color:var(--amber);opacity:.7}@media (prefers-reduced-motion:reduce){.tutorial_tabPanel__d66FR{animation:none}.tutorial_progressFill__YPmi8{transition:none}}.tutorial_heroVideoWrap__afFr3{margin-top:16px;border-radius:8px;overflow:hidden;border:1px solid var(--border);aspect-ratio:16/9;background:#000}.tutorial_heroVideo__iWjQn{width:100%;height:100%;border:0;display:block}.tutorial_lessonMobileBar__IbZn6{position:fixed;left:0;right:0;bottom:0;z-index:35;display:flex;align-items:stretch;gap:8px;padding:8px 10px calc(8px + env(safe-area-inset-bottom, 0px));background:var(--surface);border-top:1px solid var(--border);box-shadow:0 -4px 20px rgba(0,0,0,.08)}.tutorial_lessonMobileBarBtn__2IYQN{flex:1;min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:8px 10px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text-secondary);font-size:13px;font-weight:500;text-decoration:none;font-family:inherit}.tutorial_lessonMobileBarBtnNext__5yuUu{background:var(--blue);border-color:var(--blue);color:#fff}.tutorial_lessonMobileBarBtnDisabled__8nQnr{opacity:.35;pointer-events:none}.tutorial_lessonMobileBarCenter___6J7r{flex:0 0 auto;min-width:72px;min-height:44px;padding:8px 12px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:13px;font-weight:600;font-family:IBM Plex Mono,monospace;cursor:pointer}.tutorial_lessonMobileScrim___rA2X{position:fixed;inset:0;z-index:34;border:none;padding:0;margin:0;background:rgba(1,4,9,.45);cursor:pointer}.tutorial_lessonMobileMenu__ZdSC0{position:fixed;left:0;right:0;bottom:calc(60px + env(safe-area-inset-bottom, 0px));z-index:36;max-height:min(50dvh,360px);overflow:auto;background:var(--surface);border:1px solid var(--border);border-radius:12px 12px 0 0;box-shadow:0 -8px 32px rgba(0,0,0,.15);padding:12px 10px 8px}.tutorial_lessonMobileMenuTitle__bGXzD{margin:0 0 10px;padding:0 6px;font-size:12px;font-weight:600;color:var(--text-secondary)}.tutorial_lessonMobileMenuList__RQhqr{list-style:none;margin:0;padding:0}.tutorial_lessonMobileMenuItem__bfNiZ{display:flex;align-items:center;gap:10px;padding:10px 8px;border-radius:6px;text-decoration:none;color:var(--text);min-height:44px}.tutorial_lessonMobileMenuItemActive__lBdhA{background:var(--blue-bg)}.tutorial_lessonMobileMenuIndex__ESX1O{font-size:11px;font-family:IBM Plex Mono,monospace;color:var(--text-tertiary);min-width:20px}.tutorial_lessonMobileMenuText__HHDqQ{font-size:13px;line-height:1.35}@media (max-width:767px){.tutorial_tabs__7170P{scrollbar-width:thin}.tutorial_tabBtn__fQ21q{min-height:44px;flex-shrink:0}.tutorial_mcqDot__Dz5zC{width:32px;height:32px;min-width:32px;border-radius:6px}.tutorial_optionBtn__7Rm6u{min-height:44px;padding:12px 14px}.tutorial_lessonFooter__Hmmex{display:none}.tutorial_lessonPageCenter___p5vw{padding-bottom:calc(72px + env(safe-area-inset-bottom, 0px))}}