.low-level-design_page___Qkig{--lld-bg:#ffffff;--lld-border:rgb(145 158 171/24%);--lld-ink:#161c24;--lld-muted:#454f5b;--lld-primary:#299a8d;--lld-primary-dark:#227d70;--lld-primary-subtle:rgb(41 154 141/8%);background:var(--lld-bg);color:var(--lld-ink);display:flex;flex-direction:column;font-family:Open Sans,Helvetica,Arial,sans-serif;inset:0;overflow:hidden;position:fixed;z-index:100}.low-level-design_pageWithoutPromo__sRpiT{--promo-height:0px}html[data-theme=dark] .low-level-design_page___Qkig{--lld-bg:#151d1a;--lld-border:#33413d;--lld-ink:#ecf3f0;--lld-muted:#a6b3ae;--lld-primary:#64d2ae;--lld-primary-dark:#82ddbd;--lld-primary-subtle:#183a31}.low-level-design_srOnly__s8MjR{clip:rect(0,0,0,0);clip-path:inset(50%);height:1px;overflow:hidden;position:absolute;white-space:nowrap;width:1px}.low-level-design_promo__NBq5y{align-items:center;background:#46988c;color:#fff;display:flex;flex:0 0 32px;font-size:14px;justify-content:center;line-height:20px;min-height:32px;position:relative;z-index:30}.low-level-design_promo__NBq5y a{align-items:center;display:inline-flex;justify-content:center}.low-level-design_promo__NBq5y strong{font-weight:700;margin-right:8px}.low-level-design_promo__NBq5y button{align-items:center;background:transparent;color:inherit;display:flex;height:24px;justify-content:center;position:absolute;right:10px;top:4px;width:24px}.low-level-design_promo__NBq5y button img{filter:brightness(0) invert(1)}.low-level-design_promoMobile__2K_gL{display:none}.low-level-design_shell__pSv2M{display:grid;flex:1 1 auto;grid-template-columns:256px minmax(0,1fr);min-height:0}.low-level-design_sidebar__UGOKV{background:var(--lld-bg);border-right:1px solid var(--lld-border);min-height:0;overflow:hidden}.low-level-design_sidebarContent__w35SK{display:flex;flex-direction:column;height:100%}.low-level-design_sidebarScroll__9bvUQ{min-height:0;overflow-y:auto;scrollbar-width:none}.low-level-design_sidebarScroll__9bvUQ::-webkit-scrollbar{display:none}.low-level-design_logoLink__LFu6w{align-items:center;display:flex;height:64px;padding:0 12px}.low-level-design_logoLink__LFu6w img{height:auto;width:153px}.low-level-design_sidebar__UGOKV nav{padding:0 20px 24px}.low-level-design_navGroupButton__ocKJd,.low-level-design_navStandalone__auvR6{align-items:center;background:transparent;color:var(--lld-ink);display:flex;font-size:14px;font-weight:400;gap:10px;min-height:36px;padding:0;text-align:left;width:100%}.low-level-design_navGroupButton__ocKJd:hover,.low-level-design_navStandalone__auvR6:hover{color:var(--lld-primary-dark)}.low-level-design_navGroupButton__ocKJd span,.low-level-design_navStandalone__auvR6 span{flex:1}.low-level-design_navGroupButton__ocKJd>img{opacity:.72;transform:rotate(-90deg);transition:transform .15s ease}.low-level-design_navGroupButton__ocKJd>img.low-level-design_chevronOpen__pZYci{transform:rotate(0deg)}.low-level-design_navChildren__fn_EH{border-left:1px solid var(--lld-border);display:flex;flex-direction:column;margin-bottom:8px}.low-level-design_navGroup__Lz7kD:first-of-type .low-level-design_navChildren__fn_EH{margin-bottom:0}.low-level-design_navChildren__fn_EH a{align-items:center;border-radius:6px;color:var(--lld-muted);display:flex;font-size:13px;gap:6px;min-height:32px;padding:0 10px 0 18px}.low-level-design_navChildren__fn_EH a:hover,.low-level-design_navChildren__fn_EH a[aria-current=page]{background:var(--lld-primary-subtle);color:var(--lld-primary-dark)}.low-level-design_navChildren__fn_EH .low-level-design_navSeparator__Sry6Z{border-top:1px solid var(--lld-border);margin-top:8px}.low-level-design_navChildren__fn_EH a>span{flex:1}.low-level-design_navChildren__fn_EH a>svg{opacity:.62}.low-level-design_navChildren__fn_EH small{background:var(--lld-primary-subtle);border-radius:10px;color:var(--lld-primary-dark);font-size:10px;line-height:18px;padding:0 5px}.low-level-design_referLink__k_4QF{border-top:1px solid var(--lld-border);margin-top:10px;padding-top:10px}.low-level-design_sidebarFooter__hf54x{border-top:1px solid var(--lld-border);margin-top:auto}.low-level-design_pricingMobile__L58BE,.low-level-design_signInLink__uYDwT{align-items:center;color:var(--lld-ink);display:flex;font-size:14px;gap:10px;min-height:38px;padding:0 20px}.low-level-design_pricingMobile__L58BE{display:none}.low-level-design_socials__95oVE{align-items:center;border-top:1px solid var(--lld-border);display:flex;gap:17px;height:38px;padding:0 16px}.low-level-design_socials__95oVE a{align-items:center;display:flex;height:24px;justify-content:center;width:20px}.low-level-design_socials__95oVE img{opacity:.72}.low-level-design_main__IJkWj{min-height:0;min-width:0;overflow-x:hidden;overflow-y:auto}.low-level-design_topbar__No8Xm{align-items:center;background:var(--lld-bg);display:flex;height:56px;justify-content:space-between;padding:0 32px 0 16px;position:sticky;top:0;z-index:20}.low-level-design_searchBox__XHEif{align-items:center;border:1px solid #687785;border-radius:999px;color:#7c8790;display:flex;font-size:16px;gap:9px;height:38px;padding:0 10px 0 13px;width:160px}.low-level-design_searchBox__XHEif img{opacity:.68}.low-level-design_searchBox__XHEif span{flex:1}.low-level-design_searchBox__XHEif kbd{color:#aeb6bc;font-family:inherit;font-size:12px}.low-level-design_mobileTools__ugUvF,.low-level-design_topbarActions__deuSI{align-items:center;display:flex}.low-level-design_topbarActions__deuSI{gap:14px}.low-level-design_pricingDesktop__i8X8n{color:var(--lld-muted);font-size:16px}.low-level-design_tutorPill__a6uDO{align-items:center;border:1px solid var(--lld-primary-dark);border-radius:999px;color:var(--lld-primary-dark);display:flex;font-size:15px;gap:8px;height:38px;padding:0 12px}.low-level-design_premiumButton__UFNit{align-items:center;background:#41978b;border-radius:999px;color:#fff;display:inline-flex;font-size:16px;font-weight:500;height:38px;padding:0 18px;white-space:nowrap}.low-level-design_premiumButton__UFNit:hover{background:#337f75}.low-level-design_themeButton__MUHTt{border:1px solid var(--lld-border)!important;color:var(--lld-muted)!important;height:36px!important;width:36px!important}.low-level-design_mobileTools__ugUvF{display:none}.low-level-design_content__qKsO2{padding:20px 39px 0 24px;width:calc(100% + 15px)}.low-level-design_hero__VVvOt{align-items:flex-start;display:flex;gap:36px;justify-content:space-between}.low-level-design_heroCopy__D0Mv3{min-width:0}.low-level-design_hero__VVvOt h1{color:var(--lld-ink);font-size:39.81px;font-weight:600;letter-spacing:0;line-height:47.772px;margin:0}.low-level-design_hero__VVvOt h1 span{background:linear-gradient(100deg,#58aaa0,#379083);border-radius:8px;box-decoration-break:clone;box-shadow:0 -4px 0 #58aaa0,0 4px 0 #379083;color:#fff;display:inline-block;margin-left:2px;padding:0 14px}.low-level-design_hero__VVvOt p{color:var(--lld-muted);font-size:19.2px;font-weight:500;line-height:26.88px;margin:8px 0 32px;max-width:512px}.low-level-design_progressOverview__1Zoi5{align-items:center;display:flex;flex:0 0 auto;gap:18px;margin:4px 22px 0 0}.low-level-design_completionRing__P6CRx{align-items:center;background:conic-gradient(var(--lld-primary) var(--completion),color-mix(in srgb,var(--lld-border) 70%,transparent) 0);border-radius:50%;display:flex;height:68px;justify-content:center;position:relative;width:68px}.low-level-design_completionRing__P6CRx:after{background:var(--lld-bg);border-radius:50%;content:"";height:53px;position:absolute;width:53px}.low-level-design_completionRing__P6CRx>span{align-items:center;display:flex;flex-direction:column;font-size:12px;font-weight:700;line-height:1.1;position:relative;z-index:1}.low-level-design_completionRing__P6CRx small{color:var(--lld-muted);font-size:8px;font-weight:500;margin-top:3px}.low-level-design_difficultyProgress__FfsNO{display:grid;gap:16px;grid-template-columns:repeat(3,auto)}.low-level-design_difficultyProgress__FfsNO div{display:grid;gap:2px}.low-level-design_difficultyProgress__FfsNO span{font-size:10px;font-weight:600}.low-level-design_difficultyProgress__FfsNO strong{color:var(--lld-muted);font-size:12px;font-weight:500}.low-level-design_mobileWarning__cIhwp{display:none}.low-level-design_tableScroller__Wksba{overflow-x:auto;scrollbar-color:#c5c9cb transparent;scrollbar-width:thin}.low-level-design_practiceTable__Kw6Y5{border-collapse:collapse;color:var(--lld-ink);table-layout:fixed;width:100%}.low-level-design_expandColumn__sAGB2{width:0}.low-level-design_questionColumn__Kr2e5{width:33.13%}.low-level-design_difficultyColumn__Tt_CQ,.low-level-design_writeupColumn__9npIs{width:13.25%}.low-level-design_readColumn__KtP2v{width:15.92%}.low-level-design_practiceColumn__ymflV{width:24.45%}.low-level-design_practiceTable__Kw6Y5 th{color:var(--lld-muted);font-size:14px;font-weight:600;height:47px;line-height:24px;padding:12px 16px 10px;text-align:left;white-space:nowrap}.low-level-design_practiceTable__Kw6Y5 td:not(.low-level-design_expandCell__v3eyh),.low-level-design_practiceTable__Kw6Y5 th{border-bottom:1px solid var(--lld-border)}.low-level-design_practiceTable__Kw6Y5 td:last-child,.low-level-design_practiceTable__Kw6Y5 th:last-child{text-align:right}.low-level-design_practiceTable__Kw6Y5 th>span,.low-level-design_sortButton__zj11C{vertical-align:middle}.low-level-design_sortButton__zj11C{align-items:center;background:transparent;display:inline-flex;height:24px;justify-content:center;margin-left:2px;padding:0;width:20px}.low-level-design_sortIcon__gWa6H{opacity:.72}.low-level-design_sortAsc__KtFbN{transform:rotate(180deg)}.low-level-design_sortDesc__XC1ia{transform:rotate(0deg)}.low-level-design_questionRow__fzfDg{height:73px}.low-level-design_questionRow__fzfDg:hover td{background:color-mix(in srgb,var(--lld-primary-subtle) 68%,var(--lld-bg))}.low-level-design_expandButtonOpen__1hPPy,.low-level-design_questionRow__fzfDg:hover .low-level-design_expandButton__gzG8O{opacity:1}.low-level-design_practiceTable__Kw6Y5 td{background:var(--lld-bg);font-size:14px;line-height:24.5px;padding:16px;position:relative}.low-level-design_practiceTable__Kw6Y5 .low-level-design_expandCell__v3eyh{overflow:visible;padding:0;width:0}.low-level-design_expandButtonOpen__1hPPy,.low-level-design_expandButton__gzG8O{align-items:center;background:transparent;display:flex;height:32px;justify-content:center;left:-8px;opacity:0;padding:0;position:absolute;top:21px;width:32px}.low-level-design_expandButtonOpen__1hPPy img{transform:rotate(180deg)}.low-level-design_questionButton__N4BXj{background:transparent;color:var(--lld-ink);font-size:16px;line-height:24px;padding:0;text-align:left}.low-level-design_difficultyEasy__Xrmjw{color:#2c9c59}.low-level-design_difficultyMedium__LEOmU{color:#d7944d}.low-level-design_difficultyHard__o3nWr{color:#d45b42}.low-level-design_iconLink__O7b07{align-items:center;display:inline-flex;height:32px;justify-content:center;width:40px}.low-level-design_tealIcon__jsozi{filter:invert(47%) sepia(35%) saturate(873%) hue-rotate(122deg) brightness(95%) contrast(87%)}.low-level-design_slateIcon__9VGUo{filter:invert(43%) sepia(14%) saturate(598%) hue-rotate(165deg) brightness(93%) contrast(88%)}.low-level-design_readButton__fA3WE{align-items:center;background:transparent;color:#fff;display:flex;height:34px;justify-content:center;padding:0;width:34px}.low-level-design_readButton__fA3WE img{opacity:.84}.low-level-design_readButtonMarked__lp_rY{background:var(--lld-primary);border-radius:50%;height:20px;margin:7px;width:20px}.low-level-design_readButtonInProgress__0o2wO{background:color-mix(in srgb,var(--lld-primary) 16%,transparent);border:2px solid var(--lld-primary);border-radius:50%;height:20px;margin:7px;position:relative;width:20px}.low-level-design_readButtonInProgress__0o2wO:after{background:var(--lld-primary);border-radius:50%;content:"";height:6px;width:6px}.low-level-design_practiceActions__HAcga{align-items:center;display:flex;gap:8px;justify-content:flex-end}.low-level-design_historyButton__5YPJe,.low-level-design_lockedButton___7t8q,.low-level-design_startButton__TfDQr{align-items:center;border-radius:7px;display:inline-flex;font-size:13px;height:31px;justify-content:center}.low-level-design_startButton__TfDQr{background:#41978b;color:#fff;min-width:96px}.low-level-design_historyButton__5YPJe{background:transparent;border:1px solid var(--lld-border);color:var(--lld-ink);gap:4px;min-width:85px}.low-level-design_historyButton__5YPJe img{height:16px;width:16px}.low-level-design_lockedButton___7t8q{border:1px solid var(--lld-border);width:96px}.low-level-design_expandedRow__wjHE6 td{border-bottom:1px solid var(--lld-border);color:var(--lld-muted);height:auto;padding:16px}.low-level-design_historySummary__X15Jq{align-items:center;display:flex;gap:24px;justify-content:space-between}.low-level-design_historySummary__X15Jq p{margin:0}.low-level-design_historySummary__X15Jq strong{color:var(--lld-ink);display:block;font-size:13px;font-weight:600}.low-level-design_historySummary__X15Jq span{color:var(--lld-muted);font-size:12px}.low-level-design_historySummary__X15Jq a{color:var(--lld-primary-dark);font-size:12px;font-weight:600;white-space:nowrap}.low-level-design_historyList__pJrNh{border-top:1px solid var(--lld-border);list-style:none;margin:14px 0 0;padding:8px 0 0}.low-level-design_historyList__pJrNh li{align-items:center;display:grid;font-size:12px;gap:12px;grid-template-columns:minmax(84px,1fr) minmax(110px,1fr) 90px 48px 54px;min-height:34px;text-transform:capitalize}.low-level-design_historyList__pJrNh li>span,.low-level-design_historyList__pJrNh time{color:var(--lld-muted)}.low-level-design_historyList__pJrNh strong{color:var(--lld-ink);font-size:12px}.low-level-design_historyList__pJrNh a{color:var(--lld-primary-dark);font-weight:600}.low-level-design_footer__obo0G{padding:80px 16px 0}.low-level-design_footerGrid__jlq6U{display:grid;gap:16px;grid-template-columns:repeat(3,minmax(0,1fr))}.low-level-design_footer__obo0G section+section{margin-top:32px}.low-level-design_footer__obo0G h2{color:var(--lld-ink);font-size:19.2px;font-weight:600;letter-spacing:0;line-height:26.88px;margin:0 0 8px}.low-level-design_footer__obo0G ul{list-style:none;margin:0;padding:0}.low-level-design_footer__obo0G address,.low-level-design_footer__obo0G li{color:var(--lld-muted);font-size:14px;font-style:normal;line-height:28px}.low-level-design_footer__obo0G a:hover{color:var(--lld-primary-dark);text-decoration:underline;text-underline-offset:3px}.low-level-design_copyright__WN6zE{border-top:1px solid var(--lld-border);color:var(--lld-muted);font-size:11px;line-height:16px;margin:25px 0 0;padding:34px 0 38px}.low-level-design_drawerLayer__eTo0C{display:none}.low-level-design_modalBackdrop__JBKa6{align-items:center;background:rgb(22 28 36/74%);display:flex;inset:0;justify-content:center;padding:24px;position:fixed;z-index:200}.low-level-design_signInDialog__0w12y{background:var(--lld-bg);border-radius:16px;box-shadow:0 24px 48px rgb(0 0 0/24%);max-width:528px;padding:48px 64px;position:relative;text-align:center;width:100%}.low-level-design_modalClose__jQBtu{align-items:center;background:transparent;display:flex;height:40px;justify-content:center;position:absolute;right:8px;top:8px;width:40px}.low-level-design_signInDialog__0w12y h2{color:var(--lld-ink);font-size:28px;font-weight:500;letter-spacing:0;line-height:36px;margin:0}.low-level-design_signInDialog__0w12y>p{color:var(--lld-muted);font-size:16px;line-height:24px;margin:0 0 34px}.low-level-design_emailButton__1TnQi,.low-level-design_googleButton__NI_aR{align-items:center;background:transparent;border:1px solid var(--lld-border);border-radius:8px;color:var(--lld-ink);display:flex;font-size:16px;height:48px;justify-content:center;width:100%}.low-level-design_googleButton__NI_aR{gap:13px}.low-level-design_orDivider__peMXl{align-items:center;color:var(--lld-muted);display:grid;gap:10px;grid-template-columns:1fr auto 1fr;margin:26px 0}.low-level-design_orDivider__peMXl span{border-top:1px solid var(--lld-border)}.low-level-design_orDivider__peMXl p{font-size:16px;margin:0}.low-level-design_signInDialog__0w12y form{text-align:left}.low-level-design_signInDialog__0w12y label{clip:rect(0 0 0 0);height:1px;overflow:hidden;position:absolute;width:1px}.low-level-design_signInDialog__0w12y input{background:var(--lld-bg);border:1px solid var(--lld-border);border-radius:8px;color:var(--lld-ink);font-size:16px;height:56px;padding:0 14px;width:100%}.low-level-design_emailButton__1TnQi{background:#46988c;border-color:#46988c;color:#fff;font-weight:500;margin-top:16px}.low-level-design_signInDialog__0w12y small{color:var(--lld-muted);display:block;font-size:12px;line-height:20px;margin-top:16px;text-align:left}.low-level-design_signInDialog__0w12y small a{text-decoration:underline}@media (max-width:1023px){.low-level-design_promo__NBq5y{flex-basis:24px;font-size:12px;min-height:24px}.low-level-design_promoDesktop__vEOSi{display:none}.low-level-design_promoMobile__2K_gL{display:inline}.low-level-design_promoMobile__2K_gL strong{margin-right:0}.low-level-design_promo__NBq5y button{right:8px;top:0}.low-level-design_shell__pSv2M{display:block}.low-level-design_sidebar__UGOKV{display:none}.low-level-design_main__IJkWj{height:100%}.low-level-design_topbar__No8Xm{height:68px;padding:0 31px 0 16px;width:calc(100% + 15px)}.low-level-design_mobileTools__ugUvF{display:flex;gap:12px}.low-level-design_mobileTools__ugUvF a,.low-level-design_mobileTools__ugUvF button{align-items:center;background:transparent;display:flex;height:32px;justify-content:center;padding:0;width:28px}.low-level-design_pricingDesktop__i8X8n,.low-level-design_searchBox__XHEif{display:none}.low-level-design_topbarActions__deuSI{gap:16px}.low-level-design_tutorPill__a6uDO{height:36px;justify-content:center;padding:0;width:36px}.low-level-design_tutorPill__a6uDO span{display:none}.low-level-design_premiumButton__UFNit{font-size:15px;height:36px;padding:0 16px}.low-level-design_themeButton__MUHTt{height:36px!important;width:36px!important}.low-level-design_content__qKsO2{padding:0 31px 0 16px;width:calc(100% + 15px)}.low-level-design_mobileWarning__cIhwp{align-items:flex-start;background:#fdf8f3;border-radius:8px;color:#e6773c;display:flex;font-size:14px;gap:12px;line-height:24.5px;min-height:77px;padding:12px 16px}.low-level-design_warningIcon__lroTe{filter:invert(54%) sepia(85%) saturate(1132%) hue-rotate(335deg) brightness(96%) contrast(87%);flex:0 0 auto;margin-top:2px}.low-level-design_hero__VVvOt{padding-top:16px}.low-level-design_progressOverview__1Zoi5{display:none}.low-level-design_hero__VVvOt h1{font-size:26px;line-height:31.2px;max-width:343px}.low-level-design_hero__VVvOt h1 span{background:none;border-radius:0;box-shadow:none;color:inherit;display:inline-block;margin:0;padding:0}.low-level-design_hero__VVvOt p{font-size:16px;line-height:22.4px;margin:8px 0 32px;max-width:343px}.low-level-design_tableScroller__Wksba{max-height:719px;overflow:auto;width:100%}.low-level-design_practiceTable__Kw6Y5{min-width:420px;width:420px}.low-level-design_questionColumn__Kr2e5{width:300px}.low-level-design_writeupColumn__9npIs{width:120px}.low-level-design_difficultyCell__EnXKR,.low-level-design_difficultyColumn__Tt_CQ,.low-level-design_markCell__XhQdp,.low-level-design_practiceCell__Hkekq,.low-level-design_practiceColumn__ymflV,.low-level-design_readColumn__KtP2v{display:none}.low-level-design_practiceTable__Kw6Y5 th{padding:12px 16px 10px}.low-level-design_practiceTable__Kw6Y5 td:nth-child(2),.low-level-design_practiceTable__Kw6Y5 th:nth-child(2){padding-left:16px}.low-level-design_questionButton__N4BXj{color:#438f86;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:2px}.low-level-design_footer__obo0G{padding:80px 16px 0}.low-level-design_footerGrid__jlq6U{display:block;text-align:center}.low-level-design_footerGrid__jlq6U>div,.low-level-design_footerGrid__jlq6U>section,.low-level-design_footer__obo0G section+section{margin-top:32px}.low-level-design_footerGrid__jlq6U>div:first-child,.low-level-design_footerGrid__jlq6U>div:first-child>section:first-child{margin-top:0}.low-level-design_copyright__WN6zE{margin-top:25px;padding:34px 0 38px;text-align:center}.low-level-design_drawerLayer__eTo0C{display:block;inset:0;position:fixed;z-index:150}.low-level-design_drawerBackdrop__9jqE8{background:rgb(22 28 36/56%);height:100%;inset:0;padding:0;position:absolute;width:100%}.low-level-design_drawer__GwoWh{background:var(--lld-bg);height:100%;left:0;overflow:hidden;position:absolute;top:0;width:256px}.low-level-design_drawer__GwoWh .low-level-design_pricingMobile__L58BE{display:flex}.low-level-design_drawer__GwoWh .low-level-design_sidebarFooter__hf54x{background:var(--lld-bg)}}@media (max-width:480px){.low-level-design_signInDialog__0w12y{border-radius:14px;padding:44px 24px 30px}.low-level-design_signInDialog__0w12y h2{font-size:24px;line-height:32px}}