:root{--bg:#fff;--sheet:#fff;--tint:#f4f8f2;--ink:#14213d;--ink-soft:#46506a;--faint:#5b6478;--rule:#e3e7ef;--red:#e0312b;--hi:#ffe94a;--q:#2e7d32;--q-wash:#eaf6e5;--q-mid:#bfe3b3;--brand:#a5d995;--shadow:0 1px 2px #14213d0f, 0 10px 30px #14213d14;--print:var(--font-print,"Schibsted Grotesk"), "Helvetica Neue", Arial, sans-serif;--pen:var(--font-pen,"Kalam"), "Comic Sans MS", cursive;--gutter:clamp(16px, 4vw, 40px);--header-h:85px;--radius:16px;--card-rule:#d9e0d6;--card-shadow:0 1px 2px #1018280a;--section-y:clamp(48px, 6vw, 80px);--section-y-sm:clamp(36px, 4.5vw, 56px);--head-gap:16px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth}main[id],:where(main,footer) :where([id],a,button,input,select,textarea,summary,[tabindex]){scroll-margin-top:calc(var(--header-h) + 20px)}body{background:var(--bg);color:var(--ink);font-family:var(--print);-webkit-font-smoothing:antialiased;margin:0;font-size:17px;line-height:1.6;overflow-x:hidden}img,video,svg,iframe{max-width:100%}img{height:auto;display:block}button,input,textarea,select{font:inherit;color:inherit}a{color:inherit}:focus-visible{outline:3px solid var(--q);outline-offset:3px;border-radius:6px}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.wrap{max-width:1200px;padding-inline:var(--gutter);margin:0 auto}.eyebrow{color:var(--faint);margin:0;font-size:.95rem;font-weight:700}.q-eyebrow{color:var(--q)}h1,h2,h3{text-wrap:balance;margin:0}h1{letter-spacing:-.035em;font-size:clamp(2.3rem,5.4vw,3.9rem);font-weight:800;line-height:1}h2{letter-spacing:-.028em;font-size:clamp(1.7rem,3.6vw,2.4rem);font-weight:800;line-height:1.08}h3{letter-spacing:-.01em;font-size:1.15rem;font-weight:700;line-height:1.25}.lede{color:var(--ink-soft);max-width:62ch;margin:0;font-size:clamp(1.05rem,1.7vw,1.18rem)}.pen{font-family:var(--pen);color:var(--red);font-weight:700}mark{background:linear-gradient(transparent 12%, var(--hi) 12%, var(--hi) 90%, transparent 90%);color:inherit;padding:0 2px}.btn{border:2px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer;white-space:nowrap;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:11px 20px;font-weight:700;line-height:1.2;text-decoration:none;transition:transform .15s;display:inline-flex}.btn.light{color:var(--ink);background:#fff}.btn.q-btn{background:var(--q);border-color:var(--q);color:#fff}.btn:hover{transform:translateY(-1px)}.chips{flex-wrap:wrap;gap:8px;display:flex}.chip{border:1.5px solid var(--rule);cursor:pointer;color:var(--ink-soft);background:#fff;border-radius:999px;padding:7px 14px;font-size:.92rem;font-weight:600;line-height:1.2;text-decoration:none}.chip:hover{border-color:var(--ink);color:var(--ink)}.chip[aria-pressed=true],.chip[aria-current=page]{background:var(--ink);border-color:var(--ink);color:#fff}.chip.q-chip[aria-pressed=true],.chip.q-chip[aria-current=page]{background:var(--q);border-color:var(--q)}.top{top:env(safe-area-inset-top,0px);z-index:40;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--rule);background:#fffffff5;position:sticky}.top .bar{align-items:center;gap:22px;min-height:70px;display:flex}.logo-word{font-family:var(--print);letter-spacing:-.015em;color:var(--ink);white-space:nowrap;font-weight:600;line-height:1}.logo-word b{color:var(--q);font-weight:700}.logo-white .logo-word,.logo-white .logo-word b{color:#fff}.brand-link{flex-shrink:0;text-decoration:none;display:inline-flex}.main-nav{align-items:center;gap:6px;margin-left:auto;display:flex}.main-nav a,.nav-drop{color:var(--ink-soft);cursor:pointer;background:0 0;border:0;border-radius:10px;align-items:center;gap:6px;padding:8px 12px;font-size:.98rem;font-weight:600;text-decoration:none;display:inline-flex}.main-nav a:hover,.nav-drop:hover,.nav-drop[aria-expanded=true]{background:var(--tint);color:var(--ink)}.main-nav a[aria-current=page],.nav-drop[data-current]{color:var(--ink)}.nav-drop span{font-size:.8em;transition:transform .2s}.nav-drop[aria-expanded=true] span{transform:rotate(180deg)}.top .cta{padding:9px 16px}.menu-btn{border:1.5px solid var(--ink);cursor:pointer;background:#fff;border-radius:10px;margin-left:auto;padding:8px 14px;font-weight:700;display:none}.mega{border-bottom:1px solid var(--rule);background:#fff;max-height:calc(100vh - 80px);display:none;position:absolute;top:100%;left:0;right:0;overflow-y:auto;box-shadow:0 24px 40px #14213d1f}.mega[data-open=true]{display:block}.mega .wrap{padding-block:26px 22px}.mega-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:18px;display:grid}.mega-grid.videos{grid-template-columns:repeat(3,minmax(0,1fr));max-width:820px}.mega-col{background:var(--q-wash);border-radius:14px;align-content:start;gap:6px;min-width:0;padding:16px;display:grid}.mega-qual{color:var(--q);letter-spacing:-.01em;align-items:center;gap:8px;font-size:1.1rem;font-weight:800;text-decoration:none;display:inline-flex}.mega-qual i{background:var(--q);border-radius:3px;width:10px;height:10px}.mega-ages{color:var(--faint);font-size:.82rem}.mega-col ul{gap:4px;margin:6px 0 0;padding:0;list-style:none;display:grid}.mega-course{background:#ffffffb3;border-radius:8px;justify-content:space-between;gap:8px;padding:6px 8px;font-size:.93rem;font-weight:700;text-decoration:none;display:flex}.mega-course:hover{color:var(--q);background:#fff}.mega-course span{color:var(--faint);font-size:.8rem;font-weight:600}.mega-topics{margin:2px 0 4px 10px!important}.mega-topics a{color:var(--ink-soft);border-left:2px solid var(--q);padding:2px 0 2px 10px;font-size:.86rem;text-decoration:none;display:block}.mega-topics a:hover{color:var(--q)}.mega-all{border-bottom:2px solid var(--ink);margin-top:16px;font-size:.95rem;font-weight:700;text-decoration:none;display:inline-block}.mobile-nav{display:none}@media (max-width:900px){.main-nav,.top .cta{display:none}.menu-btn{display:inline-flex}.mega{display:none!important}.mobile-nav[data-open=true]{border-top:1px solid var(--rule);max-height:calc(100vh - 72px);display:block;overflow-y:auto}.mobile-nav .wrap{padding-block:8px 20px;display:grid}.mobile-nav a,.mobile-nav summary{border-bottom:1px solid var(--rule);cursor:pointer;align-items:center;gap:8px;padding:12px 2px;font-weight:700;text-decoration:none;list-style:none;display:flex}.mobile-nav summary::-webkit-details-marker{display:none}.mobile-nav summary:after{content:"+";color:var(--faint);margin-left:auto;font-size:1.2rem}.mobile-nav details[open]>summary:after{content:"–"}.mobile-nav details>a,.mobile-nav details>details{margin-left:14px}.mobile-nav details>a{color:var(--ink-soft);font-weight:600}.mobile-nav .dot{background:var(--q);border-radius:3px;width:10px;height:10px;display:inline-block}.mobile-nav .btn{color:#fff;border-bottom:0;justify-content:center}}footer{background:var(--ink);color:#c9cfdd;margin-top:0;padding-block:48px 30px}.foot-grid{grid-template-columns:1.6fr repeat(4,minmax(0,1fr));gap:26px;display:grid}.foot-grid ul{gap:6px;margin:8px 0 0;padding:0;font-size:.92rem;list-style:none;display:grid}.foot-grid a{color:#c9cfdd;text-decoration:none}.foot-grid a:hover{color:#fff}.foot-head{color:#fff;font-size:1rem;font-weight:800;text-decoration:none}.foot-grid a.foot-head{filter:brightness(1.9)saturate(.8)}.foot-brand{align-content:start;gap:10px;display:grid}.foot-brand p{max-width:30ch;margin:0;font-size:.92rem}.foot-brand span{color:#fff!important}.foot-legal{color:#8f97aa;border-top:1px solid #ffffff1f;margin-top:30px;padding-top:18px;font-size:.85rem}@media (max-width:1000px){.foot-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.foot-brand{grid-column:1/-1}}@media (max-width:560px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.foot-grid.more-quals{grid-template-columns:1.4fr repeat(5,minmax(0,1fr))}@media (max-width:1000px){.foot-grid.more-quals{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:560px){.foot-grid.more-quals{grid-template-columns:repeat(2,minmax(0,1fr))}}.zone{padding-block:var(--section-y)}.zone.tint{background:var(--tint)}.zone:not(.tint):not(.hero-zone)+.zone:not(.tint),.zone.tint+.zone.tint{padding-top:0}section.block{padding-top:clamp(56px,8vw,96px)}main>.wrap:last-child,main>div>.wrap:last-child{padding-bottom:clamp(64px,9vw,110px)}.block-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:14px 30px;margin-bottom:24px;display:flex}.block-head>div{gap:10px;min-width:0;max-width:720px;display:grid}.more{white-space:nowrap;color:var(--q);border-bottom:2px solid;font-weight:700;text-decoration:none}.hero-zone{padding-block:0;position:relative;overflow:clip visible}.hero-bg{background:var(--q-wash);border-bottom:1px solid var(--q-mid);position:absolute;inset:0}.hero{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);align-items:center;gap:clamp(28px,5vw,60px);padding-block:clamp(40px,7vw,84px) clamp(40px,6vw,70px);display:grid;position:relative}.hero-copy{gap:22px;min-width:0;display:grid}.hl-word{background:linear-gradient(transparent 58%, var(--hi) 58%, var(--hi) 92%, transparent 92%)}.hero-actions{flex-wrap:wrap;gap:12px;display:flex}.hero-quals{flex-wrap:wrap;gap:8px;display:flex}.hero-quals a{background:var(--q-wash);color:var(--q);border:1.5px solid var(--q-mid);border-radius:999px;padding:6px 12px;font-size:.9rem;font-weight:700;text-decoration:none}.hero-quals a:hover{background:var(--q);color:#fff;border-color:var(--q)}.fan{min-width:0;height:clamp(320px,36vw,460px);position:relative}.fan a{border-top:6px solid var(--q);background:#fff;width:54%;transition:transform .25s;position:absolute;box-shadow:0 18px 40px #14213d29}.fan a:first-child{top:12%;left:0;transform:rotate(-7deg)}.fan a:nth-child(2){z-index:2;top:2%;left:23%;transform:rotate(2deg)}.fan a:nth-child(3){top:16%;right:0;transform:rotate(8deg)}.fan a:hover{z-index:3;transform:rotate(0)translateY(-6px)}.fan .tag{background:var(--q);color:#fff;border-radius:999px;padding:4px 10px;font-size:.78rem;font-weight:700;position:absolute;bottom:10px;left:10px}@media (max-width:900px){.hero{grid-template-columns:minmax(0,1fr)}.fan{height:80vw;max-height:430px}}.quals{grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;display:grid}@media (max-width:1100px){.quals{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:720px){.quals{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:440px){.quals{grid-template-columns:minmax(0,1fr)}}.qual{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1.5px solid var(--card-rule);background:#fff;align-content:start;gap:6px;min-width:0;padding:18px;transition:border-color .15s;display:grid}.qual:hover{border-color:var(--q)}.qual .name{letter-spacing:-.03em;color:var(--q);font-size:1.6rem;font-weight:800;line-height:1.05;text-decoration:none}.qual .blurb{color:var(--faint);font-size:.86rem}.qual ul{gap:6px;margin:8px 0 0;padding:0;list-style:none;display:grid}.qual li a{background:var(--q-wash);border-radius:9px;padding:7px 10px;font-size:.9rem;font-weight:700;text-decoration:none;display:block}.qual li a:hover{background:var(--q);color:#fff}.grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:22px;display:grid}.card{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1.5px solid var(--card-rule);background:#fff;grid-template-rows:auto 1fr;min-width:0;text-decoration:none;transition:border-color .15s,transform .15s;display:grid;overflow:hidden}.card:hover{border-color:var(--q);transform:translateY(-2px)}.card .thumb{background:var(--q-wash);aspect-ratio:4/3;justify-content:center;align-items:flex-start;padding:16px 16px 0;display:flex;position:relative;overflow:hidden}.card .thumb img{border-top:5px solid var(--t,var(--q));width:80%;box-shadow:0 4px 14px #14213d2e}.card .thumb.wide img{width:100%;margin-top:18px}.card .thumb.video{align-items:center;padding:0}.card .thumb.video img{object-fit:cover;width:100%;height:100%;box-shadow:none;border-top:0}.card .play{place-items:center;display:grid;position:absolute;inset:0}.card .play span{background:var(--q);color:#fff;width:56px;height:56px;box-shadow:var(--shadow);border-radius:50%;place-items:center;padding-left:4px;display:grid}.card .body{align-content:start;gap:6px;padding:16px 18px 18px;display:grid}.type{letter-spacing:.02em;color:var(--t,var(--ink));background:color-mix(in srgb, var(--t,var(--ink)) 12%, white);border-radius:999px;justify-self:start;align-items:center;padding:3px 9px;font-size:.76rem;font-weight:800;display:inline-flex}.course-tag{color:var(--q);font-size:.84rem;font-weight:700}.card .meta{color:var(--faint);font-size:.86rem}.lesson-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,420px),1fr));gap:24px;display:grid}.lesson{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;min-width:0;overflow:hidden}.video-16x9{aspect-ratio:16/9;background:var(--ink)}.video-16x9 video{width:100%;height:100%;display:block}.lesson-body{gap:6px;padding:16px 20px 20px;display:grid}.lesson-body h3 a{text-decoration:none}.lesson-body p{color:var(--ink-soft);margin:0;font-size:.95rem}.reels{scroll-snap-type:x mandatory;gap:22px;padding-bottom:10px;display:flex;overflow-x:auto}.short{scroll-snap-align:start;flex:none;gap:10px;width:min(250px,66vw);display:grid}.short h3{font-size:1rem}.short h3 a{text-decoration:none}.phone{aspect-ratio:9/16;background:var(--ink);border:6px solid var(--ink);border-radius:24px;width:100%;overflow:hidden}.phone video{object-fit:cover;width:100%;height:100%;display:block}.band{background:var(--ink);color:#fff;border-radius:24px;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);align-items:center;gap:30px;padding:clamp(28px,5vw,56px);display:grid;position:relative;overflow:hidden}.band .lede{color:#c9cfdd}.band ul{z-index:1;gap:10px;margin:0;padding:0;list-style:none;display:grid;position:relative}.band li{align-items:baseline;gap:10px;display:flex}.band li:before{content:"";background:var(--red);border-radius:2px;flex-shrink:0;width:8px;height:8px;transform:translateY(-2px)}.band .btn{color:var(--ink);background:#fff;border-color:#fff}@media (max-width:820px){.band{grid-template-columns:minmax(0,1fr)}}.q-hero{background:var(--q-wash);border-bottom:1px solid var(--q-mid);padding-block:18px clamp(34px,5vw,56px)}.q-hero .wrap{gap:14px;display:grid}.q-hero .crumb{margin-bottom:18px}.hero-text{align-content:center;gap:14px;min-width:0;display:grid}.q-hero h1{color:var(--ink)}.q-hero.slim h1{font-size:clamp(2rem,4.4vw,3.1rem)}.crumb ol{color:var(--faint);flex-wrap:wrap;gap:4px 0;margin:0;padding:0;font-size:.9rem;list-style:none;display:flex}.crumb li+li:before{content:"/";color:var(--q-mid);margin:0 8px}.crumb a{color:var(--q);font-weight:600;text-decoration:none}.crumb a:hover{text-decoration:underline}.course-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:22px;display:grid}.course-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.course-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}@media (max-width:1000px){.course-grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:760px){.course-grid.two,.course-grid.three{grid-template-columns:minmax(0,1fr)}}.course-card{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1.5px solid var(--card-rule);background:#fff;align-content:start;gap:10px;padding:26px;transition:border-color .15s;display:grid}.course-card:hover{border-color:var(--q)}.course-card h2{font-size:1.6rem}.course-card h2 a{text-decoration:none}.course-card h2 a:hover{color:var(--q)}.course-top{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.board{color:#fff;background:var(--q);border-radius:6px;padding:2px 8px;font-size:.8rem;font-weight:800}.code{color:var(--faint);font-size:.85rem;font-weight:600}.course-meta{color:var(--ink-soft);margin:0}.course-live{margin:0;font-size:.95rem}.course-live a{color:var(--q);font-weight:700}.course-card .btn{justify-self:start;margin-top:4px}.topic-list{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;margin:0;padding:0;list-style:none;overflow:hidden}.topic-list li{border-top:1px solid var(--rule);align-items:center;gap:16px;padding:16px 22px;display:flex}.topic-list li:first-child{border-top:0}.topic-list .num{background:var(--tint);width:34px;height:34px;color:var(--faint);border-radius:10px;flex-shrink:0;place-items:center;font-weight:800;display:grid}.topic-list li[data-live] .num{background:var(--q);color:#fff}.topic-list .name{flex:1;min-width:0;font-weight:700;text-decoration:none}.topic-list a.name{color:var(--ink)}.topic-list a.name:hover{color:var(--q)}.topic-list span.name{color:var(--ink-soft);font-weight:600}.topic-list .status{color:var(--faint);white-space:nowrap;font-size:.86rem;font-weight:700}.topic-list li[data-live] .status{color:var(--q)}@media (max-width:520px){.topic-list li{flex-wrap:wrap}.topic-list .status{margin-left:50px}}.type-group+.type-group{margin-top:44px}.type-group h2{margin-bottom:16px;font-size:1.5rem}.prev-next{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:56px;display:grid}.prev-next a{background:var(--q-wash);border-radius:12px;align-content:start;gap:2px;padding:14px 18px;font-weight:700;text-decoration:none;display:grid}.prev-next a span{color:var(--q);font-size:.8rem;font-weight:700}.prev-next a.next{text-align:right;grid-column:2}@media (max-width:560px){.prev-next{grid-template-columns:minmax(0,1fr);gap:10px;margin-top:32px}.prev-next a.next{grid-column:1}.prev-next>span:empty{display:none}}.qual-rows{gap:22px;display:grid}.qual-row{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:24px;padding:24px;display:grid}.qual-row-head{align-content:start;gap:4px;display:grid}.qual-name{letter-spacing:-.03em;color:var(--q);font-size:1.9rem;font-weight:800;text-decoration:none}.qual-row-head span{color:var(--faint);font-size:.92rem;font-weight:600}.qual-row-head p{color:var(--ink-soft);margin:6px 0 0}.qual-row-courses{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));align-content:start;gap:12px;display:grid}.mini-course{background:var(--q-wash);border:1.5px solid #0000;border-radius:12px;align-content:start;gap:6px;padding:14px;text-decoration:none;display:grid}.mini-course:hover{border-color:var(--q)}.mini-course .board{justify-self:start}.mini-course .n{color:var(--faint);font-size:.85rem}@media (max-width:760px){.qual-row{grid-template-columns:minmax(0,1fr)}}.page-head{gap:12px;padding-block:clamp(36px,6vw,60px) 22px;display:grid}.filters{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;gap:14px;margin-bottom:26px;padding:20px;display:grid}.filter-row{grid-template-columns:130px minmax(0,1fr);align-items:center;gap:12px;display:grid}.filter-row>span,.filter-row>label{font-size:.92rem;font-weight:700}@media (max-width:640px){.filter-row{grid-template-columns:minmax(0,1fr);gap:6px}}.field{background:#fff;border:1.5px solid #8a93a6;border-radius:10px;width:100%;min-width:0;padding:10px 12px;font-size:1rem}.field:focus{border-color:var(--q);outline:3px solid var(--q);outline-offset:1px}.result-count{color:var(--faint);margin:0 0 14px;font-weight:600}.empty{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;justify-items:start;gap:12px;padding:30px;display:grid}.reader{grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:clamp(26px,4vw,56px);padding-top:clamp(26px,4vw,40px);display:grid}@media (max-width:980px){.reader{grid-template-columns:minmax(0,1fr)}.reader-side{order:-1}}.reader-main{min-width:0}.reader-side{gap:14px;min-width:0;display:grid;position:sticky;top:94px}@media (max-width:980px){.reader-side{position:static}.reader-side .toc{display:none}}.side-card{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;gap:12px;padding:20px;display:grid}.side-card .btn{width:100%}.facts{grid-template-columns:auto minmax(0,1fr);gap:6px 14px;margin:0;font-size:.94rem;display:grid}.facts dt{color:var(--faint);font-weight:600}.facts dd{margin:0;font-weight:600}.facts a{color:var(--q);text-decoration:none}.toc-head{font-size:.9rem;font-weight:800}.toc ol{gap:6px;margin:0;padding-left:18px;font-size:.92rem;display:grid}.toc a{color:var(--ink-soft);text-decoration:none}.toc a:hover{color:var(--q)}.side-help{color:var(--faint);margin:0;font-size:.9rem}.side-help a{color:var(--q);font-weight:700}.video-block{margin-bottom:30px}.video-block .video-16x9{border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.video-alt{color:var(--faint);margin:10px 0 0;font-size:.92rem}.video-alt a{color:var(--q);font-weight:700}.article{max-width:760px;font-size:1.06rem;line-height:1.7}.article .intro{color:var(--ink-soft);margin:0 0 8px;font-size:1.15rem}.article p{margin:0 0 14px}.article ul,.article ol{margin:0 0 16px;padding-left:22px}.article li{margin-bottom:6px}.a-section{padding-top:36px}.a-section>h2{flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin-bottom:14px;font-size:clamp(1.5rem,3vw,1.9rem);display:flex}.a-section .spec{color:var(--q);background:var(--q-wash);letter-spacing:0;border-radius:6px;padding:2px 8px;font-size:.8rem;font-weight:700}.article h3{margin:22px 0 8px;font-size:1.2rem}.tip{border-left:4px solid var(--red);background:#fff4f2;border-radius:0 12px 12px 0;gap:2px;margin:18px 0;padding:12px 16px;display:grid}.tip .pen{font-size:1.05rem}.tip p{margin:0}.fig{justify-items:center;gap:8px;margin:22px 0;display:grid}.fig>div{width:100%}.fig figcaption{color:var(--faint);text-align:center;font-size:.9rem}.fig-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.cells3{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}@media (max-width:560px){.fig-row,.cells3{grid-template-columns:minmax(0,1fr)}}.stages{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:18px 0;display:grid}.stages figure{gap:6px;margin:0;display:grid}.stages svg{width:100%!important;height:auto!important}.stages figcaption{color:var(--ink-soft);font-size:.88rem;line-height:1.4}@media (max-width:640px){.stages{grid-template-columns:repeat(2,minmax(0,1fr))}}.table-wrap{border:1px solid var(--rule);border-radius:12px;margin:16px 0 20px;overflow-x:auto}.article table{border-collapse:collapse;width:100%;min-width:480px;font-size:.95rem}.article caption{text-align:left;background:var(--q-wash);color:var(--ink);padding:10px 14px;font-weight:700}.article th,.article td{text-align:left;border-top:1px solid var(--rule);vertical-align:top;padding:9px 14px}.article thead th{color:var(--ink-soft);background:#fafbfd;font-size:.86rem}.article tbody th{font-weight:700}.equation{background:var(--q-wash);border-radius:12px;flex-wrap:wrap;align-items:center;gap:14px;margin:18px 0;padding:16px 20px;font-size:1.15rem;font-weight:700;display:flex}.frac{text-align:center;display:inline-grid}.frac span:first-child{border-bottom:2px solid var(--ink);padding:0 6px 2px}.frac span:last-child{padding-top:2px}.quick{background:var(--tint);border-radius:14px;margin:24px 0 8px;padding:18px 22px}.quick h3{margin:0 0 8px}.quick ol{margin:0}.quick li p{margin:0 0 4px}.article details summary{cursor:pointer;color:var(--q);font-size:.92rem;font-weight:700}.article details p{margin:6px 0 0}.examq{border:1px solid var(--rule);background:#fff;border-radius:14px;margin:14px 0;padding:16px 18px}.examq-head{flex-wrap:wrap;align-items:flex-start;gap:12px;display:flex}.qn{background:var(--q);color:#fff;border-radius:8px;padding:2px 8px;font-size:.9rem;font-weight:800}.examq-text{flex:280px;min-width:0;font-weight:600}.mk{color:var(--faint);white-space:nowrap;font-weight:700}.examq details{margin-top:10px}.ms{background:var(--q-wash);border-radius:10px;margin-top:8px;padding:12px 14px}.ms p:last-child,.ms ul:last-child{margin-bottom:0}.glossary{border:1px solid var(--rule);border-radius:14px;gap:0;margin:0;display:grid;overflow:hidden}.glossary>div{border-top:1px solid var(--rule);grid-template-columns:minmax(150px,.4fr) minmax(0,1fr);gap:16px;padding:12px 16px;display:grid}.glossary>div:first-child{border-top:0}.glossary dt{font-weight:800}.glossary dd{margin:0}@media (max-width:560px){.glossary>div{grid-template-columns:minmax(0,1fr);gap:2px}}.cols{columns:2;column-gap:30px}@media (max-width:560px){.cols{columns:1}}.slides-list{gap:28px;list-style:none;display:grid;padding:0!important}.slides-list li{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:center;gap:22px;display:grid}.slides-list img{width:100%;box-shadow:var(--shadow);border-radius:8px}.slides-list h3{margin-top:0!important}@media (max-width:640px){.slides-list li{grid-template-columns:minmax(0,1fr)}}.tutor{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:start;gap:clamp(26px,5vw,56px);padding-top:10px;display:grid}@media (max-width:900px){.tutor{grid-template-columns:minmax(0,1fr)}}.ways{gap:0;display:grid}.way{border-top:1px solid var(--rule);gap:4px;padding:18px 0;display:grid}.way p{color:var(--ink-soft);margin:0}.form{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;gap:16px;min-width:0;padding:clamp(20px,4vw,30px);display:grid}.form label{gap:6px;min-width:0;font-size:.95rem;font-weight:600;display:grid}.form .row{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}@media (max-width:560px){.form .row{grid-template-columns:minmax(0,1fr)}}.form textarea.field{resize:vertical;min-height:110px}.form .note{color:var(--faint);margin:0;font-size:.86rem}.done{justify-items:start;gap:10px;padding:20px 0;display:grid}.q-hero.neutral{background:var(--q-wash);border-bottom-color:var(--q-mid)}.q-hero.split .wrap{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);align-items:center;column-gap:clamp(24px,4vw,56px)}.q-hero.split .crumb{grid-column:1/-1}.q-hero.split .hero-text{align-content:center;gap:14px;min-width:0;display:grid}.mini-fan{aspect-ratio:1/.92;justify-self:end;width:100%;min-width:0;max-width:480px;margin-block:8px 18px;position:relative}.mini-fan.wide{aspect-ratio:1/.62}.mini-fan span{border-top:6px solid var(--sheet-c,var(--q));background:#fff;width:46%;display:block;position:absolute;box-shadow:0 14px 32px #14213d29}.mini-fan span img{width:100%}.mini-fan span:first-child{top:12%;left:4%;transform:rotate(-7deg)}.mini-fan span:nth-child(2){z-index:2;top:0;left:27%;transform:rotate(2deg)}.mini-fan span:nth-child(3){top:14%;right:2%;transform:rotate(8deg)}.mini-fan.one span{width:60%;top:4%;left:20%;transform:rotate(-2deg)}.mini-fan.wide span{width:78%}.mini-fan.wide span:first-child{left:0}.mini-fan.wide.one span{width:86%;left:7%}.mini-fan .tag{background:var(--q);color:#fff;border-radius:999px;padding:3px 9px;font-size:.74rem;font-weight:700;position:absolute;bottom:8px;left:8px}@media (max-width:860px){.q-hero.split .wrap{grid-template-columns:minmax(0,1fr)}.mini-fan{justify-self:center;max-width:400px}}.socials{flex-wrap:wrap;gap:8px!important;margin-top:6px!important;display:flex!important}.socials span{border:1.5px solid #ffffff40;border-radius:999px;padding:5px 12px;font-size:.85rem;font-weight:700;display:inline-block}.follow{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}@media (max-width:720px){.follow{grid-template-columns:minmax(0,1fr)}}.follow>div{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;gap:4px;padding:20px;display:grid}.follow b{font-size:1.2rem}.follow span{color:var(--faint);font-size:.92rem}.q-hero.hero-blue{background:var(--q-wash);border-bottom-color:var(--q-mid)}.article.paper-sheet{box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;border-radius:4px;max-width:860px;padding:clamp(24px,4vw,48px) clamp(18px,4vw,48px) clamp(28px,4vw,48px);position:relative}.article.paper-sheet .a-section:first-of-type{padding-top:20px}.article .tip{background:0 0;border:0;max-width:64ch;margin:16px 0 18px;padding:0;display:block}.article .tip .pen{color:#c8261f;margin-right:6px;font-size:1.12rem}.article .tip p{font-family:var(--pen);color:#c8261f;letter-spacing:.005em;font-size:1.12rem;font-weight:700;line-height:1.55;display:inline}.vid-controls{gap:16px;margin-bottom:30px;display:grid}.subject-tabs{border-bottom:2px solid var(--rule);gap:4px;display:flex;overflow-x:auto}.subject-tab{color:var(--faint);cursor:pointer;white-space:nowrap;background:0 0;border:0;border-bottom:3px solid #0000;align-items:center;gap:8px;margin-bottom:-2px;padding:12px 18px;font-size:1.05rem;font-weight:800;display:inline-flex}.subject-tab[aria-selected=true]{color:var(--ink);border-bottom-color:var(--ink)}.subject-tab span{color:var(--faint);background:var(--tint);border-radius:999px;padding:2px 8px;font-size:.72rem;font-weight:700}.vid-filters{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 20px;display:flex}.vid-search{flex:0 300px;min-width:200px}.shelf+.shelf{margin-top:44px}.shelf-head{flex-wrap:wrap;align-items:baseline;gap:14px;margin-bottom:16px;display:flex}.shelf-head h2{font-size:1.5rem}.shelf-row{scroll-snap-type:x mandatory;grid-auto-columns:minmax(260px,340px);grid-auto-flow:column;gap:20px;padding-bottom:10px;display:grid;overflow-x:auto}.vcard{scroll-snap-align:start;align-content:start;gap:8px;text-decoration:none;display:grid}.vthumb{aspect-ratio:16/9;background:var(--q-wash);box-shadow:var(--shadow);border-radius:14px;display:block;position:relative;overflow:hidden}.vthumb img{object-fit:cover;width:100%;height:100%;transition:transform .25s}.vcard:hover .vthumb img{transform:scale(1.03)}.vcard:hover h3{color:var(--q)}.dur{color:#fff;background:#14213de0;border-radius:6px;padding:2px 7px;font-size:.8rem;font-weight:700;position:absolute;bottom:8px;right:8px}.vcard h3{font-size:1.05rem}.vmeta{color:var(--faint);font-size:.9rem;line-height:1.45}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.mega-grid{grid-template-columns:minmax(0,2fr) minmax(0,1fr);max-width:900px}.mega-boards{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:8px;display:grid}.mega-board{color:var(--ink-soft);margin-bottom:2px;font-size:.85rem;font-weight:800;display:block}.soon-col{background:var(--tint)}.mega-qual.plain,.mega-course.soon{color:var(--ink-soft)}.m-soon span{color:var(--faint);margin-left:6px;font-size:.8rem;font-weight:600}.badge{letter-spacing:.01em;vertical-align:middle;border-radius:6px;align-items:center;padding:2px 8px;font-size:.74rem;font-weight:800;display:inline-flex}.badge.higher{color:#8a5a00;background:#fff1d6}.badge.triple{color:#5b3fb8;background:#efe9fb}.route{color:#fff;background:var(--q);border-radius:6px;padding:2px 8px;font-size:.78rem;font-weight:800}.route.combined{color:var(--q);border:1.5px solid var(--q);background:#fff}.course-pick{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}@media (max-width:760px){.course-pick{grid-template-columns:minmax(0,1fr)}}.board-block{background:var(--q-wash);border-radius:var(--radius);gap:12px;padding:20px;display:grid}.board-name{letter-spacing:-.02em;color:var(--q);font-size:1.5rem;font-weight:800}.board-courses{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}@media (max-width:440px){.board-courses{grid-template-columns:minmax(0,1fr)}}.pick{box-shadow:var(--card-shadow);border:1.5px solid var(--card-rule);background:#fff;border-radius:12px;align-content:start;gap:6px;padding:16px;text-decoration:none;display:grid}.pick:hover{border-color:var(--q)}.pick .route{justify-self:start}.pick b{font-size:1.1rem}.pick-meta{color:var(--faint);font-size:.86rem}.soon-line{color:var(--faint);margin:22px 0 0;font-weight:600}.soon-line a{color:var(--ink-soft)}.card-tags{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.hero-title{font-size:clamp(2.3rem,3.7vw,3.2rem)}@media (min-width:901px){.hero{grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr)}.hero-title>span{text-wrap:balance;display:block}}.exam-info{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:30px;display:grid}@media (max-width:860px){.exam-info{grid-template-columns:minmax(0,1fr)}}.exam-info>div:first-child{gap:12px;display:grid}.exam-info h2{font-size:1.75rem}.papers{gap:14px;display:grid}.paper-fact{border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--card-rule);background:#fff;gap:8px;padding:18px 20px;display:grid}.exam-line{color:var(--ink-soft);margin:0;font-weight:600}.skip-link{z-index:100;background:var(--ink);color:#fff;border-radius:10px;padding:10px 16px;font-weight:800;text-decoration:none;position:fixed;top:10px;left:12px;transform:translateY(-160%)}.skip-link:focus,.skip-link:focus-visible{outline:3px solid var(--hi);outline-offset:2px;transform:none}main:focus,[tabindex="-1"]:focus{outline:none}.h3{letter-spacing:-.01em;font-size:1.15rem;font-weight:700;line-height:1.25}.form label .req{color:var(--faint);font-size:.86rem;font-weight:600}.form .field[aria-invalid=true]{border-color:#b3261e}.form .field-err{color:#b3261e;font-size:.88rem;font-weight:600}.form .form-err{background:#fff4f2;border-left:4px solid #b3261e;border-radius:0 12px 12px 0;justify-items:start;gap:10px;padding:12px 16px;display:grid}.form .form-err p{margin:0}.form .btn[disabled]{opacity:.7;cursor:progress}.btn.wa{background:#1fa855;border-color:#1fa855}.hero-zone+.zone.home-courses{padding-top:var(--section-y)}.about-body{padding-top:var(--section-y-sm)}.about-points{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;display:grid}.about-point{border:1px solid var(--card-rule);box-shadow:var(--card-shadow);border-radius:var(--radius);background:#fff;align-content:start;gap:8px;padding:24px;display:grid}.about-point h2{letter-spacing:-.01em;font-size:1.15rem;font-weight:700;line-height:1.25}.about-point p{color:var(--ink-soft);margin:0}.about-body section.block{padding-top:var(--section-y)}@media (max-width:900px){:root{--header-h:69px}}.shelf-qual{letter-spacing:.08em;text-transform:uppercase;color:var(--q);margin:8px 0 4px;font-size:.85rem;font-weight:800}.shelf-more{margin-left:auto}.vgrid{grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));gap:22px;display:grid}.vwhere{color:var(--q);font-size:.82rem;font-weight:700}.vplay{color:#fff;background:#2e8540;border-radius:50%;place-items:center;width:52px;height:52px;margin:-26px 0 0 -26px;padding-left:3px;transition:transform .2s;display:grid;position:absolute;top:50%;left:50%;box-shadow:0 6px 18px #0000004d,0 0 0 5px #ffffff4d}.vcard:hover .vplay{transform:scale(1.08)}
.flag-badges{vertical-align:middle;flex-wrap:wrap;gap:6px;display:inline-flex}.a-section>h2 .flag-badges{font-size:1rem}.flagged{border:1.5px dashed var(--rule);border-radius:12px;margin:14px 0 18px;padding:12px 16px 2px}.flagged>.flag-badges{margin-bottom:8px;display:flex}.flagged>:last-child{margin-bottom:12px}.steps-list{counter-reset:step;gap:8px;list-style:none;display:grid;padding-left:0!important}.steps-list li{counter-increment:step;padding-left:40px;position:relative;margin:0!important}.steps-list li:before{content:counter(step);background:var(--q-wash);width:26px;height:26px;color:var(--q);border-radius:50%;place-items:center;font-size:.86rem;font-weight:800;display:grid;position:absolute;top:1px;left:0}.worked{background:var(--tint);border-radius:14px;margin:18px 0;padding:16px 20px}.worked h4{margin:0 0 6px;font-size:1.02rem}.worked ol{margin-bottom:8px!important}.worked .worked-answer{margin:0}.mcq{margin:8px 0 0!important;padding-left:26px!important}.mcq li{margin-bottom:4px!important}.examq-text>p:last-child{margin-bottom:0}.examq-text .flag-badges{margin-bottom:6px;display:flex}.examq-text>.examq-paper{letter-spacing:.03em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 4px;font-size:.78rem;font-weight:700}.examq .table-wrap{margin:10px 0}.ms ul{margin:0;padding-left:20px}.ms table.levels{background:#fff;border-radius:8px;min-width:0;font-size:.92rem;overflow:hidden}.ms .ic-head{margin:12px 0 4px}.gen-worksheet .a-section>h2,.gen-notes .a-section>h2{scroll-margin-top:90px}.sub-list{gap:12px;list-style:none;display:grid;margin:18px 0 0!important;padding:0!important}.sub-list li{margin:0!important}.sub-card{border:1.5px solid var(--rule);color:var(--ink);background:#fff;border-radius:14px;grid-template-columns:40px minmax(0,1fr);gap:14px;height:100%;padding:16px 18px;text-decoration:none;transition:border-color .15s;display:grid}.sub-num{background:var(--q-wash);width:36px;height:36px;color:var(--q);border-radius:50%;place-items:center;font-weight:800;display:grid}.sub-body{align-content:start;gap:3px;line-height:1.45;display:grid}.sub-title{flex-wrap:wrap;align-items:center;gap:6px 10px;font-size:1.08rem;font-weight:800;display:flex}.sub-spec{color:var(--q);font-size:.8rem;font-weight:700}.sub-sum{color:var(--ink-soft);font-size:.95rem}.sub-secs{color:var(--faint);font-size:.84rem}.topic-subs{margin-bottom:clamp(36px,5vw,56px)}.topic-subs .sub-list{grid-template-columns:repeat(2,minmax(0,1fr))}@media (max-width:760px){.topic-subs .sub-list{grid-template-columns:minmax(0,1fr)}}.sub-of{color:var(--ink-soft);font-size:.86rem;font-weight:700}.side-card.also ul,.side-card.also ol{gap:6px;margin:0;padding-left:18px;font-size:.92rem;display:grid}.side-card.also a{color:var(--ink-soft)}.side-card.also a:hover{color:var(--q)}.toc b{color:var(--ink)}.article.paper-sheet.gen-mindmap{max-width:none;padding:clamp(12px,1.6vw,22px)}.mm-viewer{grid-template-rows:auto minmax(0,1fr);gap:10px;display:grid}.mm-tools{flex-wrap:wrap;justify-content:space-between;gap:8px;display:flex}.mm-tools-group{flex-wrap:wrap;gap:6px;display:inline-flex}.mm-btn{border:1.5px solid var(--card-rule);min-height:38px;color:var(--ink);font:inherit;cursor:pointer;background:#fff;border-radius:10px;justify-content:center;align-items:center;gap:6px;padding:7px 14px;font-size:.9rem;font-weight:700;line-height:1.2;transition:border-color .15s,background .15s;display:inline-flex}.mm-btn:hover:not(:disabled){border-color:var(--q)}.mm-btn:disabled{color:var(--faint);opacity:.55;cursor:default}.mm-btn:focus-visible,.mm-stage:focus-visible{outline:3px solid var(--q);outline-offset:2px}.mm-btn.icon{width:40px;padding:0}.mm-btn{position:relative}.mm-seg{display:inline-flex}.mm-seg .mm-btn:first-child{border-top-right-radius:0;border-bottom-right-radius:0}.mm-seg .mm-btn:last-child{border-top-left-radius:0;border-bottom-left-radius:0;margin-left:-1.5px}.mm-seg .mm-btn:hover,.mm-seg .mm-btn:focus-visible{z-index:1}.mm-tip{z-index:20;background:var(--ink);color:#fff;letter-spacing:.005em;white-space:nowrap;pointer-events:none;opacity:0;visibility:hidden;border-radius:8px;padding:6px 10px;font-size:.84rem;font-weight:500;line-height:1.2;transition:opacity .12s,visibility .12s;position:absolute;top:calc(100% + 9px);left:50%;transform:translate(-50%);box-shadow:0 6px 16px #14213d33,0 1px 3px #14213d29}.mm-tip:before{content:"";background:var(--ink);border-radius:1.5px;width:8px;height:8px;position:absolute;top:-4px;left:50%;transform:translate(-50%)rotate(45deg)}.mm-tip.end{left:auto;right:0;transform:none}.mm-tip.end:before{left:auto;right:16px;transform:rotate(45deg)}@media (hover:hover){.mm-btn:hover .mm-tip{opacity:1;visibility:visible;transition-delay:.25s}}.mm-btn:focus-visible .mm-tip{opacity:1;visibility:visible}.mm-btn.icon svg{fill:none;stroke:currentColor;stroke-width:2.2px;stroke-linecap:round;stroke-linejoin:round;width:18px;height:18px}.mm-stage{height:calc(100vh - var(--header-h) - 140px);border:1px solid var(--card-rule);border-radius:var(--radius);touch-action:none;cursor:grab;-webkit-user-select:none;user-select:none;overscroll-behavior:contain;background-color:#fcfdfb;background-image:radial-gradient(circle,#e4e9e1 1px,#0000 1.2px);background-size:22px 22px;min-height:520px;position:relative;overflow:hidden}.mm-stage.is-dragging{cursor:grabbing}.mm-pan{transform-origin:0 0;will-change:transform;opacity:0;width:max-content;position:absolute;top:0;left:0}.mm-pan.is-ready{opacity:1}.mm-pan.is-anim{transition:transform .26s cubic-bezier(.25,.8,.3,1)}.mm-hint{color:#fff;text-align:center;pointer-events:none;background:#14213dd1;border-radius:999px;width:max-content;max-width:calc(100% - 24px);margin:0;padding:7px 14px;font-size:.84rem;font-weight:600;line-height:1.35;position:absolute;bottom:14px;left:50%;transform:translate(-50%)}.mm-viewer.is-full{background:#fff;padding:12px}.mm-viewer.is-overlay{z-index:1000;position:fixed;inset:0}.mm-viewer.is-full .mm-stage{height:auto;min-height:0}.mm-listbar{justify-content:center;margin-top:14px;display:flex}.mm-svg{max-width:none;display:block;overflow:visible}.mm-centre rect{filter:drop-shadow(0 3px 8px #14213d2e)}.mm-pill-g{cursor:pointer}.mm-b.is-folded .mm-sub{display:none}.mm-b.is-folded .mm-more{display:inline}.mm-b{transition:opacity .18s}@media (hover:hover){.mm-stage:not(.is-dragging) .mm-svg:has(.mm-b:hover) .mm-b:not(:hover){opacity:.22}}@media (prefers-reduced-motion:reduce){.mm-b,.mm-pan.is-anim{transition:none}}.mm-tree{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.mm.list-open .mm-tree{clip:auto;white-space:normal;width:auto;height:auto;margin:22px 0 0;position:static;overflow:visible}@media screen and (max-width:720px){.mm-wrap .article.paper-sheet.gen-mindmap{box-shadow:none;background:0 0;border:0;padding:0}.mm-stage{height:calc(100svh - var(--header-h) - 150px);margin:0 calc(-1 * var(--gutter));border-left:0;border-right:0;border-radius:0}.mm-tools,.mm-tools-group{flex-wrap:nowrap;gap:5px}.mm-btn{padding:6px 9px;font-size:.82rem}.mm-btn.icon{width:36px}.mm-btn{white-space:nowrap}.mm-stage .mm-svg .mm-centre-n{display:inline}.mm-stage .mm-svg .mm-centre-w{display:none}}.mm-tree ul{list-style:none;margin:0!important;padding:0!important}.mm-tree li{margin:0!important}.mm-tree .flag-badges{margin-left:2px}.mm-tree-root{text-align:center;margin:2px 0 20px}.mm-tree-root>span{background:var(--q);color:#fff;letter-spacing:-.01em;border-radius:14px;padding:10px 22px;font-size:1.2rem;font-weight:800;line-height:1.25;display:inline-block}.mm-tree-branches{gap:20px;display:grid}.mm-tree-branches>li{--l:var(--b)}.mm-tree-b{flex-wrap:wrap;align-items:center;gap:6px 8px;display:flex}.mm-tree-pill{background:color-mix(in srgb, var(--b) 90%, black);color:#fff;border-radius:999px;padding:6px 14px;font-size:1.08rem;font-weight:700;line-height:1.3}.mm-tree-nodes{margin-left:15px!important}.mm-tree-nodes>li{font-size:1.04rem;line-height:1.35;position:relative;padding:10px 0 0 22px!important}.mm-tree-nodes>li:before{content:"";border-left:2px solid var(--l);border-bottom:2px solid var(--l);border-bottom-left-radius:9px;width:15px;height:calc(10px + .68em);position:absolute;top:0;left:0}.mm-tree-nodes>li:not(:last-child):after{content:"";border-left:2px solid var(--l);position:absolute;top:0;bottom:0;left:0}.mm-tree-n{color:color-mix(in srgb, var(--b) 62%, black);font-weight:700}.mm-tree-leaves{flex-wrap:wrap;display:flex;margin-top:3px!important}.mm-tree-leaves li{color:var(--ink);font-size:.95rem;line-height:1.5}.mm-tree-leaves li:not(:last-child):after{content:"·" / "";color:color-mix(in srgb, var(--b) 75%, white);margin:0 8px 0 7px;font-weight:800}.mm-wrap .print-only{display:none}@media print{.mm-wrap .no-print{display:none!important}body:has(.mm-wrap) header.top{display:none!important}body:has(.mm-wrap) .course-nav{display:none!important}body:has(.mm-wrap) .crumb{display:none!important}body:has(.mm-wrap) .kind-hero{display:none!important}body:has(.mm-wrap)>footer{display:none!important}body:has(.mm-wrap) .course-shell{display:block}.mm-wrap{padding:0}.mm-wrap .print-only{margin:0 0 8pt;font-size:13pt;font-weight:800;display:block}.article.paper-sheet.gen-mindmap{box-shadow:none;border:0;padding:0}.mm-stage{background:0 0;border:0;min-height:0;overflow:visible;height:auto!important}.mm-pan{width:auto;position:static;opacity:1!important;transform:none!important}.mm-hint{display:none}.mm-svg{max-height:255mm;width:100%!important;height:auto!important}.mm-b{opacity:1!important}.mm-b .mm-sub{display:inline!important}.mm-more{display:none!important}.mm-centre rect{filter:none}.mm.print-tall .mm-viewer{display:none}.mm.print-tall .mm-tree{clip:auto;white-space:normal;width:auto;height:auto;margin:0;position:static;overflow:visible}.mm:not(.print-tall) .mm-tree{display:none}.mm-tree-branches>li{break-inside:avoid}}.fc{gap:16px;display:grid}.fc-controls{gap:10px;display:grid}.fc-toggles{flex-wrap:wrap;gap:6px 18px;display:flex}.fc-check{color:var(--ink-soft);cursor:pointer;align-items:center;gap:8px;font-size:.92rem;font-weight:600;display:inline-flex}.fc-check input{width:18px;height:18px;accent-color:var(--q)}.fc-bar{color:var(--ink-soft);flex-wrap:wrap;justify-content:space-between;gap:6px 16px;font-size:.92rem;font-weight:700;display:flex}.fc-tally b{border-radius:999px;place-items:center;min-width:26px;margin:0 4px 0 10px;padding:1px 7px;font-size:.86rem;display:inline-grid}.fc-tally .got{background:var(--q-wash);color:var(--q)}.fc-tally .not{color:#8a5a00;background:#fff1d6}.fc-card{all:unset;box-sizing:border-box;perspective:1400px;cursor:pointer;border-radius:20px;width:100%;min-height:clamp(230px,34vw,300px);display:block}.fc-card:focus-visible{outline:3px solid var(--q);outline-offset:4px}.fc-inner{width:100%;min-height:inherit;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.3,.7,.3,1);display:block;position:relative}.fc-card.flipped .fc-inner{transform:rotateY(180deg)}.fc-face{backface-visibility:hidden;border:1.5px solid var(--rule);box-shadow:var(--shadow);background:#fff;border-radius:20px;grid-template-rows:auto 1fr auto;gap:10px;padding:clamp(18px,3vw,28px);display:grid;position:absolute;inset:0}.fc-back{background:var(--q-wash);border-color:var(--q-mid);transform:rotateY(180deg)}.fc-meta{color:var(--faint);flex-wrap:wrap;align-items:center;gap:8px;font-size:.82rem;font-weight:700;display:flex}.fc-text{text-align:center;color:var(--ink);place-self:center;max-width:34ch;font-size:clamp(1.15rem,2.4vw,1.45rem);font-weight:700;line-height:1.4}.fc-back .fc-text{max-width:44ch;font-size:clamp(1.05rem,2.1vw,1.25rem);font-weight:600}.fc-hint{color:var(--faint);justify-self:center;font-size:.84rem;font-weight:600}.fc-actions{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.fc-actions .btn{min-width:120px}.btn.fc-not{color:#6b4500;background:#fff1d6;border-color:#f0c66b}.btn.fc-got{background:var(--q);border-color:var(--q);color:#fff}.fc-end{text-align:center;background:var(--tint);border-radius:20px;justify-items:center;gap:8px;padding:34px 20px;display:grid}.fc-end h3{margin:0}.fc-end p{color:var(--ink-soft);margin:0}.fc-end-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:6px;display:flex}.fc-foot{border-top:1px solid var(--rule);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding-top:12px;display:flex}.fc-foot-btns{gap:16px;display:inline-flex}.link-btn{font:inherit;color:var(--q);cursor:pointer;text-underline-offset:3px;background:0 0;border:0;padding:0;font-size:.92rem;font-weight:700;text-decoration:underline}.fc-keys{color:var(--faint);font-size:.82rem;margin:0!important}@media (hover:none){.fc-keys{display:none}}.fc-all{margin-top:28px}.fc-all summary{font-size:1rem!important}.fc-all section h3{margin-top:18px}.card .thumb.drawn{align-items:flex-start}.drawn-sheet{aspect-ratio:.72;background:#fff;flex-direction:column;gap:7px;width:78%;padding:14px 14px 0;display:flex;overflow:hidden;box-shadow:0 4px 14px #14213d2e}.card .thumb.wide .drawn-sheet{aspect-ratio:1.45;width:100%;margin-top:18px}.drawn-sheet b{color:var(--t);background:color-mix(in srgb, var(--t) 12%, white);border-radius:999px;align-self:flex-start;padding:2px 7px;font-size:.66rem;font-weight:800}.drawn-sheet i{color:var(--ink);margin-bottom:4px;font-size:.86rem;font-style:normal;font-weight:800;line-height:1.2}.drawn-sheet s{background:#e9edf3;border-radius:3px;height:6px;text-decoration:none;display:block}.drawn-cards{grid-template-columns:1fr 1fr;gap:7px;margin-top:4px;display:grid}.drawn-cards u{aspect-ratio:1.5;background:color-mix(in srgb, var(--t) 10%, white);border:1px solid color-mix(in srgb, var(--t) 25%, white);border-radius:6px;display:block}.drawn-mm{flex:1;place-items:center;display:grid}.drawn-mm u{background:color-mix(in srgb, var(--t) 18%, white);border-radius:999px;width:40%;height:26%;box-shadow:-70px -30px 0 -8px #e9edf3,70px -30px 0 -8px #e9edf3,-70px 30px 0 -8px #e9edf3,70px 30px 0 -8px #e9edf3}.article.paper-sheet.gen-flashcards,.article.paper-sheet.gen-mindmap{padding-left:clamp(18px,4vw,48px)}.article.paper-sheet.gen-flashcards:before,.article.paper-sheet.gen-mindmap:before{display:none}.examq table{min-width:0}@media (max-width:980px){.reader.content-first .reader-side{order:0}}@media (max-width:480px){.fc-actions{flex-wrap:nowrap}.fc-actions .btn{flex:1;min-width:0;padding-left:10px;padding-right:10px}}.gen-fig img{width:100%;height:auto;display:block}.sub-has{flex-wrap:wrap;gap:6px;margin-top:4px;display:flex}.sub-has span{color:var(--ink-soft);background:var(--tint);border-radius:999px;padding:2px 9px;font-size:.78rem;font-weight:700}.whole-topic{margin-bottom:clamp(36px,5vw,56px)}.whole-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;display:grid}@media (max-width:1000px){.whole-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:520px){.whole-grid{grid-template-columns:minmax(0,1fr)}}.whole-item{border:1.5px solid var(--rule);background:#fff;border-radius:14px;align-content:start;gap:6px;padding:16px;display:grid}.whole-item b{font-size:1.05rem}.whole-what{color:var(--faint);font-size:.88rem}.whole-actions{flex-wrap:wrap;gap:8px;margin-top:6px;display:flex}.whole-actions .btn{padding:8px 14px;font-size:.9rem}.sub-wrap{max-width:980px;padding-top:clamp(22px,3.5vw,34px)}.spec-chip{color:var(--q);background:#fff;border-radius:6px;padding:2px 8px;font-size:.8rem;font-weight:700}.tab-bar{box-shadow:inset 0 -2px 0 var(--rule);scrollbar-width:none;background:var(--bg);z-index:5;gap:4px;margin-bottom:18px;display:flex;position:sticky;top:70px;overflow:auto hidden}.tab{font:inherit;color:var(--faint);cursor:pointer;white-space:nowrap;background:0 0;border:0;flex:none;align-items:center;gap:8px;padding:12px 18px;font-size:1.05rem;font-weight:800;display:inline-flex}.tab[aria-selected=true]{color:var(--q);box-shadow:inset 0 -3px 0 var(--q)}.tab-bar::-webkit-scrollbar{display:none}.tab span{color:var(--ink-soft);background:var(--tint);border-radius:999px;padding:2px 8px;font-size:.76rem;font-weight:800}.panel-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 20px;margin-bottom:16px;display:flex}.panel-bar p{color:var(--ink-soft);flex:320px;margin:0}.pdf-btn{align-items:center;gap:8px;display:inline-flex}.pdf-btn span{color:var(--faint);font-size:.8rem;font-weight:600}.sub-wrap .article.paper-sheet{max-width:none}.paper-groups{gap:clamp(28px,4vw,40px);display:grid}.paper-head{flex-wrap:wrap;align-items:baseline;gap:6px 14px;margin-bottom:12px;display:flex}.paper-head h3{font-size:1.15rem;font-weight:800}.paper-head span{color:var(--faint);font-weight:600}.topic-list .t-main{gap:3px;min-width:0;display:grid}.topic-list .t-subs{color:var(--faint);font-size:.86rem;line-height:1.4}.topic-list .t-main{flex:1}.sub-card .sub-title{color:var(--ink);text-decoration:none}.sub-card .sub-title:hover{color:var(--q)}.sub-go{flex-wrap:wrap;gap:8px;margin-top:10px;display:flex}.sub-go .btn{align-items:center;gap:6px;padding:7px 14px;font-size:.9rem;display:inline-flex}.sub-go .btn span{background:var(--tint);color:var(--ink-soft);border-radius:999px;padding:1px 7px;font-size:.76rem;font-weight:800}.sub-card:hover{border-color:var(--rule)}a.whole-item{color:var(--ink);text-decoration:none;transition:border-color .15s}a.whole-item:hover{border-color:var(--q)}.whole-cta{color:var(--q);align-items:center;gap:6px;margin-top:6px;font-weight:800;display:inline-flex}.whole-cta:before{content:"↓"}.reader-side{position:static!important}.side-note{color:var(--ink-soft);margin:0;font-size:.9rem}.cookie-bar{z-index:50;background:#fff;border-radius:16px;flex-wrap:wrap;align-items:center;gap:12px 16px;max-width:620px;margin:0 auto;padding:14px 16px;display:flex;position:fixed;bottom:16px;left:16px;right:16px;box-shadow:0 10px 40px #14213d38}.cookie-bar p{color:var(--ink-soft);flex:280px;margin:0;font-size:.92rem}.cookie-bar div{gap:8px;display:flex}.cookie-bar .btn{padding:8px 16px;font-size:.92rem}.fig-zoom{margin:0 auto;display:block;position:relative}.zoom-hint{display:none}.side-card .btn{white-space:normal;text-align:center}.chip{max-width:100%}@media (max-width:640px){.article.paper-sheet{padding:22px 16px 26px}.article.paper-sheet:before{display:none}.article{font-size:1rem}.a-section>h2{font-size:1.4rem}.article table{min-width:0;font-size:.9rem}.article table:has(th:nth-child(4)){min-width:520px}.article th,.article td{padding:8px 10px}.glossary>div{padding:10px 12px}.worked,.quick,.flagged{padding-left:14px;padding-right:14px}.examq{padding:14px}.examq-head{gap:8px}.ms{padding:10px}.ms table.levels th,.ms table.levels td{padding:6px 8px}.zoom-hint{color:var(--q);margin-top:4px;font-size:.78rem;font-weight:700;display:block}.tab-bar{grid-template-columns:repeat(3,minmax(0,1fr));gap:0;display:grid}.tab{justify-content:center;gap:5px;padding:12px 4px;font-size:.95rem}.tab span{padding:1px 6px;font-size:.7rem}.panel-bar .btn{width:100%}.sub-card{grid-template-columns:minmax(0,1fr);gap:8px;padding:14px}.sub-card .sub-num{display:none}.sub-go{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;display:grid}.sub-go .btn{gap:4px;padding:8px 4px;font-size:.86rem}.sub-go .btn span{padding:0 5px;font-size:.7rem}.topic-list li{flex-wrap:wrap;align-items:flex-start;gap:6px 12px;padding:14px 16px}.topic-list .t-main{flex:calc(100% - 50px)}.topic-list .status{margin-left:46px}.whole-item{padding:14px}.fc-check{align-items:flex-start}.fc-check input{flex-shrink:0;margin-top:2px}.chips .chip{white-space:normal;text-align:left}}@media (max-width:380px){.logo-mark{width:auto;height:36px}.logo-word{font-size:17px!important}.top .bar{gap:12px}.menu-btn{padding:7px 11px}.tab{font-size:.88rem}.sub-go .btn{font-size:.8rem}}.fig>a.fig-zoom{width:100%}@media (max-width:640px){.tab span,.sub-go .btn span{display:none}.tab{font-size:1rem}.sub-go .btn{font-size:.9rem}}@media (max-width:420px){.pdf-btn span{display:none}}@media (max-width:900px){.topic-subs .sub-list{grid-template-columns:minmax(0,1fr)}}@media (max-width:380px){.sub-go .btn{padding:8px 2px;font-size:.8rem}.tab{font-size:.92rem}}@media print{.zoom-hint{display:none!important}}@media (max-width:480px){.fc-actions{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.fc-actions .btn{white-space:normal;width:100%;min-width:0}.fc-actions .q-btn{order:-1;grid-column:1/-1}}@media (max-width:560px){.article .note-table table{min-width:0!important}.note-table thead{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.note-table table,.note-table tbody,.note-table tr,.article .note-table tbody th,.article .note-table tbody td{width:auto;display:block}.note-table caption{display:block}.note-table tr+tr{border-top:6px solid var(--tint)}.article .note-table tbody th,.article .note-table tbody td{border-top:0;padding:4px 12px}.article .note-table tbody th{font-size:1rem}.article .note-table tr>:first-child{padding-top:10px}.article .note-table tr>:last-child{padding-bottom:12px}.note-table td[data-label]:not([data-label=""]):before{content:attr(data-label);color:var(--faint);text-transform:uppercase;letter-spacing:.04em;font-size:.74rem;font-weight:800;display:block}.examq .note-table thead{clip:auto;white-space:normal;width:auto;height:auto;position:static;overflow:visible}.examq .note-table table{display:table}.examq .note-table tbody{display:table-row-group}.examq .note-table tr{border-top:0;display:table-row}.article .examq .note-table tbody th,.article .examq .note-table tbody td{border-top:1px solid var(--rule);padding:8px 10px;display:table-cell}.examq .note-table td[data-label]:before{display:none}}.badge-explain{vertical-align:middle;display:inline-block;position:relative}.badge-explain>summary{cursor:pointer;gap:5px;list-style:none}.badge-explain>summary::-webkit-details-marker{display:none}.badge-explain>summary:focus-visible{outline:2px solid var(--q);outline-offset:2px}.badge-q{border:1.5px solid;border-radius:50%;place-items:center;width:14px;height:14px;font-size:.62rem;line-height:1;display:inline-grid}.badge-pop{z-index:20;width:max-content;max-width:min(300px,100vw - 48px);color:var(--ink);border:1.5px solid var(--rule);white-space:normal;text-transform:none;letter-spacing:0;background:#fff;border-radius:10px;padding:10px 12px;font-size:.86rem;font-weight:500;line-height:1.45;position:absolute;top:calc(100% + 6px);left:0;box-shadow:0 8px 24px #1414281f}.badge-pop a{color:var(--q);font-weight:700}@media print{.badge-q,.badge-pop{display:none}}@media (max-width:640px){.badge-explain[open]{flex-basis:100%;display:block}.badge-explain>summary{width:max-content}.badge-pop{width:auto;max-width:none;box-shadow:none;margin-top:6px;display:block;position:static}.flag-badges:has(.badge-explain[open]){flex-basis:100%;width:100%;display:flex}}.topic-list .t-subs{-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}@media (max-width:480px){.fc-actions{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.fc-actions:has(>:nth-child(3)){grid-template-columns:minmax(0,1fr) minmax(0,1.7fr) minmax(0,1fr)}.fc-actions .btn{padding-left:6px;padding-right:6px}}
.course-shell{grid-template-columns:236px minmax(0,1fr);align-items:start;display:grid}.course-main{min-width:0}.course-nav{top:var(--header-h);height:calc(100vh - var(--header-h));border-right:1px solid var(--rule);background:#fff;align-content:start;align-self:start;gap:14px;padding:18px 12px 24px;display:grid;position:sticky;overflow-y:auto}.cn-course{border-bottom:1px solid var(--rule);color:var(--ink);gap:2px;padding:4px 10px 12px;text-decoration:none;display:grid}.cn-course b{font-size:1rem;line-height:1.25}.cn-course span{color:var(--faint);font-size:.8rem;font-weight:600}.course-nav ul{gap:2px;margin:0;padding:0;list-style:none;display:grid}.course-nav li a,.cn-search{color:var(--ink-soft);border-radius:10px;align-items:center;gap:11px;padding:9px 10px;font-size:.96rem;font-weight:600;text-decoration:none;display:flex}.course-nav li a:hover,.cn-search:hover{background:var(--tint);color:var(--ink)}.course-nav li a[aria-current=page]{background:var(--q-wash);color:var(--q);font-weight:800}.cn-search{border:1.5px solid var(--rule);justify-content:flex-start}.course-main .q-hero{padding-block:14px clamp(22px,3vw,34px)}.kind-hero h1{font-size:clamp(1.7rem,3.6vw,2.6rem)}.kind-hero .lede{max-width:70ch}.kinds-zone{padding-bottom:0!important}.kinds-head{margin-bottom:var(--head-gap);font-size:1.75rem}.kinds{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}@media (max-width:1100px){.kinds{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:520px){.kinds{grid-template-columns:minmax(0,1fr)}}.kind{border:1.5px solid var(--rule);color:var(--ink);background:#fff;border-radius:14px;gap:4px;padding:16px 18px;text-decoration:none;transition:border-color .15s;display:grid}.kind:hover{border-color:var(--q)}.kind b{font-size:1.08rem}.kind span{color:var(--ink-soft);font-size:.92rem}.kind small{color:var(--q);margin-top:4px;font-size:.82rem;font-weight:800}.hub-grid{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:16px;display:grid}@media (max-width:1100px){.hub-grid{grid-template-columns:minmax(0,1fr)}}.hub-topic{border:1.5px solid var(--rule);background:#fff;border-radius:16px;gap:8px;padding:16px;display:grid}.hub-topic header{align-items:center;gap:12px;padding-bottom:6px;display:flex}.hub-topic h2{font-size:1.15rem}.hub-topic header p{color:var(--faint);margin:2px 0 0;font-size:.86rem;font-weight:600}.hub-num{background:var(--q);color:#fff;border-radius:9px;flex-shrink:0;place-items:center;width:32px;height:32px;font-size:.92rem;font-weight:800;display:grid}.hub-sub{border:1px solid var(--rule);background:var(--tint);border-radius:12px}.hub-sub summary{cursor:pointer;flex-wrap:wrap;align-items:center;gap:8px;padding:11px 14px;font-weight:700;list-style:none;display:flex}.hub-sub summary::-webkit-details-marker{display:none}.hub-sub summary:after{content:"+";color:var(--q);margin-left:auto;font-size:1.1rem;font-weight:800}.hub-sub[open] summary:after{content:"−"}.hub-sub ol{gap:6px;margin:0;padding:0 14px 12px 34px;display:grid}.hub-sub li a{color:var(--ink-soft);font-weight:500;text-decoration:none}.hub-sub li a:hover{color:var(--q);text-decoration:underline}.hub-links{gap:6px;margin:0;padding:0;list-style:none;display:grid}.hub-links a{background:var(--tint);color:var(--ink);border-radius:12px;justify-content:space-between;align-items:center;gap:10px;padding:11px 14px;font-weight:700;text-decoration:none;display:flex}.hub-links a:hover{background:var(--q-wash);color:var(--q)}.hub-links small{color:var(--faint);white-space:nowrap;font-weight:700}.hub-all{justify-self:start;margin-top:4px}.pdf-link:hover .pdf-label{text-decoration:underline}.pdf-link small{color:var(--faint);white-space:nowrap;margin-left:6px;font-size:.8rem;font-weight:600}.pdf-link{color:var(--q);grid-template-columns:15px auto;align-items:start;column-gap:7px;padding:6px 0;font-size:.92rem;font-weight:800;line-height:1.4;text-decoration:none;display:inline-grid}.pdf-link svg{margin-top:calc(.7em - 7.5px)}.pdf-link:hover .pdf-text{text-decoration:underline}.pdf-text{text-align:left;min-width:0}.pdf-link small{color:var(--faint);white-space:nowrap;margin-left:7px;font-size:.8rem;font-weight:600;text-decoration:none;display:inline-block}.pdf-short{display:none}@media (max-width:560px){.pdf-link .pdf-long{display:none}.pdf-link .pdf-short{display:inline}}.list-rows{gap:10px;display:grid}.list-row{border:1.5px solid var(--rule);background:#fff;border-radius:14px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;padding:14px 16px;display:grid}.lr-title{color:var(--ink);gap:2px;font-size:1.04rem;font-weight:800;text-decoration:none;display:grid}a.lr-title:hover{color:var(--q)}.lr-title small{color:var(--faint);font-size:.84rem;font-weight:600}.lr-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:12px;display:flex}.lr-actions .btn{padding:8px 14px;font-size:.9rem}@media (max-width:640px){.list-row{grid-template-columns:auto minmax(0,1fr)}.lr-actions{grid-column:1/-1;justify-content:flex-start}}.study{grid-template-columns:270px minmax(0,1fr);align-items:start;gap:clamp(20px,3vw,36px);padding-top:24px;padding-bottom:56px;display:grid}.study-main{gap:16px;min-width:0;display:grid}.study-bar{flex-wrap:wrap;align-items:center;gap:8px 14px;display:flex}.study-bar .pdf-link{margin-left:auto}.note-sheet .a-section:first-child{padding-top:0}.note-sheet .a-section>h2:first-child{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.note-sheet .a-section>h2:first-child .spec:before{content:", "}.note-sheet{max-width:none}.practise{background:var(--q-wash);border-radius:14px;flex-wrap:wrap;align-items:center;gap:10px;padding:14px 16px;display:flex}.practise b{margin-right:4px}.practise .btn{padding:8px 16px}.mm-wrap{gap:14px;padding-top:20px;padding-bottom:56px;display:grid}.tree{border:1.5px solid var(--rule);background:#fff;border-radius:14px;max-height:calc(100vh - 110px);padding:10px;position:sticky;top:90px;overflow-y:auto}.tree-toggle{display:none}.tree-topics{gap:2px;margin:0;padding:0;list-style:none;display:grid}.tree-topics>li>details>summary{cursor:pointer;border-radius:9px;grid-template-columns:26px minmax(0,1fr);align-items:start;gap:8px;padding:8px;font-size:.93rem;font-weight:700;line-height:1.3;list-style:none;display:grid}.tree-topics summary::-webkit-details-marker{display:none}.tree-topics summary:hover{background:var(--tint)}.tree-topics summary.here{color:var(--q)}.tree-topics summary small{color:var(--faint);margin-top:2px;font-size:.76rem;font-weight:600;display:block}.tn{background:var(--tint);width:24px;height:24px;color:var(--ink-soft);border-radius:7px;place-items:center;font-size:.78rem;font-weight:800;display:grid}summary.here .tn{background:var(--q);color:#fff}.tree-subs{border-left:2px solid var(--rule);gap:1px;margin:2px 0 8px 18px;padding:0 0 0 12px;list-style:none;display:grid}.tree-subs a{color:var(--ink-soft);border-radius:8px;padding:6px 8px;font-size:.88rem;line-height:1.3;text-decoration:none;display:block}.tree-subs a:hover{background:var(--tint);color:var(--ink)}.tree-subs a.open{color:var(--ink);font-weight:700}.tree-subs a[aria-current=page]{background:var(--q-wash);color:var(--q);font-weight:800}.tree-secs{border-left:2px solid var(--q-mid);gap:1px;margin:2px 0 6px 8px;padding:0 0 0 10px;list-style:none;display:grid}.tree-secs a{padding:5px 8px;font-size:.84rem}.search{gap:14px;max-width:820px;display:grid}.search-field{border:2px solid var(--ink);background:#fff;border-radius:14px;align-items:center;gap:10px;padding:4px 14px;display:flex}.search-field svg{color:var(--faint);flex-shrink:0}.search-field input{font:inherit;background:0 0;border:0;outline:0;width:100%;min-width:0;padding:10px 0;font-size:1.15rem}.search-count{color:var(--faint);margin:0;font-weight:600}.search-out{align-content:start;gap:14px;min-height:100svh;display:grid}.search-out .search-count{min-height:1.6em}.search-results{gap:8px;margin:0;padding:0;list-style:none;display:grid}.search-results a{border:1.5px solid var(--rule);color:var(--ink);background:#fff;border-radius:12px;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:2px 12px;padding:12px 14px;text-decoration:none;display:grid}.search-results a:hover{border-color:var(--q)}.search-results b{font-size:1.02rem}.search-results small{color:var(--faint);grid-column:2;font-size:.84rem}.sr-kind{background:var(--tint);color:var(--ink-soft);text-align:center;border-radius:999px;grid-row:span 2;min-width:78px;padding:3px 8px;font-size:.74rem;font-weight:800}.continue{margin-bottom:var(--section-y);background:var(--q-wash);border:1.5px solid var(--q-mid);border-radius:16px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 20px;padding:16px 18px;display:flex}.continue>div:first-child{gap:2px;display:grid}.continue b{font-size:1.12rem}.continue small{color:var(--ink-soft)}.continue-actions{flex-wrap:wrap;gap:8px;display:flex}@media (max-width:980px){.course-shell{grid-template-columns:minmax(0,1fr)}.course-nav{z-index:6;border-right:0;border-bottom:1px solid var(--rule);height:auto;padding:8px var(--gutter);align-items:center;gap:8px;display:flex;position:sticky;top:62px;overflow:visible}.cn-course,.cn-search{display:none}.course-nav ul{scrollbar-width:none;flex:1;gap:6px;display:flex;overflow-x:auto}.course-nav ul::-webkit-scrollbar{display:none}.course-nav li a{white-space:nowrap;border:1.5px solid var(--rule);border-radius:999px;padding:7px 12px;font-size:.88rem}.course-nav li a svg{display:none}.course-nav li a[aria-current=page]{border-color:var(--q)}.study{grid-template-columns:minmax(0,1fr);padding-top:16px}.tree{max-height:none;padding:0;position:static;overflow:hidden}.tree-toggle{width:100%;font:inherit;cursor:pointer;text-align:left;color:var(--ink);background:0 0;border:0;align-items:center;gap:10px;padding:13px 14px;font-weight:800;display:flex}.tree-toggle b{color:var(--faint);text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;font-size:.9rem;font-weight:600;overflow:hidden}.tree-toggle i{color:var(--q);margin-left:auto;font-size:1.3rem;font-style:normal}.tree-body{padding:0 10px 10px;display:none}.tree[data-open] .tree-body{display:block}.study-bar .pdf-link{margin-left:0}}@media (max-width:640px){.course-main .q-hero .crumb{margin-bottom:8px}.hub-topic{padding:14px}.search-results a{grid-template-columns:minmax(0,1fr)}.sr-kind{grid-row:auto;justify-self:start;min-width:0}.search-results small{grid-column:auto}}.article.paper-sheet.note-sheet{padding:clamp(20px,3vw,36px)}.article.paper-sheet.note-sheet:before{display:none}.kinds-zone+.zone{padding-top:clamp(36px,5vw,56px)}.study-main>*,.study>*{min-width:0}.study-bar .pdf-link{flex:0 auto;min-width:0}@media (max-width:1180px) and (min-width:981px){.study{grid-template-columns:230px minmax(0,1fr);gap:20px}}@media (max-width:640px){.article.paper-sheet.note-sheet{padding:18px 14px 22px}}@media (max-width:380px){.article.paper-sheet.note-sheet{padding:16px 10px 20px}.fc-actions .btn{padding-left:8px;padding-right:8px}}.hub-sub summary{grid-template-columns:minmax(0,1fr) auto;display:grid}.hub-sub summary:after{margin-left:0}@media (max-width:640px){.study-bar .pdf-link{text-align:left;border:1.5px solid var(--q);border-radius:12px;justify-content:center;width:100%;padding:10px 12px}}.hub-sub summary{flex-wrap:nowrap;grid-template-columns:minmax(0,1fr) auto auto;grid-template-areas:"title badges toggle";column-gap:10px;display:grid}.hub-sub summary .hs-title{grid-area:title;min-width:0}.hub-sub summary .flag-badges{grid-area:badges;justify-content:flex-end}.hub-sub summary:after{text-align:center;grid-area:toggle;width:1em;margin-left:0}@media (max-width:560px){.hub-sub summary{grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"title toggle""badges toggle";row-gap:6px}.hub-sub summary .flag-badges{justify-content:flex-start}.hub-sub summary:after{align-self:start}}@media (max-width:640px){.study-bar .pdf-link{border:1.5px solid var(--q);border-radius:12px;grid-template-columns:15px minmax(0,auto);justify-content:center;width:100%;padding:10px 12px}}.top .main-nav{margin-left:8px}.site-search{border:1.5px solid var(--rule);background:var(--tint);border-radius:999px;flex:360px;align-items:center;max-width:560px;margin-left:auto;padding:0 5px 0 18px;transition:border-color .15s,background .15s;display:flex}.site-search:focus-within{border-color:var(--q);background:#fff}.site-search input{min-width:0;font:inherit;background:0 0;border:0;outline:0;flex:1;padding:11px 0;font-size:.95rem}.site-search button{background:var(--q);color:#fff;cursor:pointer;border:0;border-radius:50%;flex-shrink:0;place-items:center;width:36px;height:36px;display:grid}.search-btn{color:var(--ink);border-radius:10px;padding:8px;display:none}.tools-grid{grid-template-columns:1fr 1fr 1.2fr;gap:28px;display:grid}.tools-head{letter-spacing:.06em;text-transform:uppercase;color:var(--faint);margin-bottom:8px;font-size:.78rem;font-weight:800;display:block}.tools-col ul{gap:2px;margin:0;padding:0;list-style:none;display:grid}.tool-link{color:var(--ink);border-radius:10px;gap:1px;padding:9px 12px;text-decoration:none;display:grid}.tool-link:hover{background:var(--tint)}.tool-link b{font-size:1rem}.tool-link span{color:var(--faint);font-size:.86rem}.courses-col{background:var(--q-wash);border-radius:14px;padding:14px}.course-link{color:var(--ink);border-radius:9px;justify-content:space-between;gap:10px;padding:8px 10px;font-weight:700;text-decoration:none;display:flex}.course-link:hover{color:var(--q);background:#fff}.course-link span{color:var(--faint);font-size:.84rem;font-weight:600}.tools-soon{color:var(--ink-soft);margin-top:10px;padding:0 10px;font-size:.86rem;display:block}.tools-soon a{color:var(--ink-soft)}.m-head{letter-spacing:.06em;text-transform:uppercase;color:var(--faint);padding:14px 2px 4px;font-size:.76rem;font-weight:800;display:block}@media (max-width:1100px){.site-search{flex-basis:240px}}@media (max-width:900px){.site-search{display:none}.search-btn{margin-left:auto;display:inline-flex}.top .menu-btn{margin-left:4px}}.pick-zone .wrap{gap:var(--section-y-sm);display:grid}.pick-group{gap:0;display:grid}.pick-group>.kinds-head{margin:0 0 var(--head-gap)}.pick-zone .continue{margin-bottom:0}.pick-boards{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}@media (max-width:760px){.pick-boards{grid-template-columns:minmax(0,1fr)}}.pick-board{background:var(--q-wash);border-radius:16px;align-content:start;gap:10px;padding:18px;display:grid}.pick-board h2{color:var(--q);font-size:1.4rem}.pick-course{color:var(--ink);border:1.5px solid var(--card-rule);background:#fff;border-radius:12px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:2px 12px;padding:14px 16px;text-decoration:none;display:grid}.pick-course:hover{border-color:var(--q)}.pick-course b{font-size:1.05rem}.pick-course small{color:var(--faint);grid-column:1;font-weight:600}.pick-course i{color:var(--q);white-space:nowrap;grid-area:1/2/span 2;font-style:normal;font-weight:800}.pick-soon{color:var(--ink-soft);margin:0}.study{grid-template-columns:340px minmax(0,1fr);align-items:start;gap:0;max-width:none;padding:0;display:grid}.study-main{min-width:0;display:block}.study-main .q-hero{border-left:0}.study-body{padding:22px var(--gutter) 56px;gap:16px;max-width:980px;display:grid}.study-body>*{min-width:0}.tree{top:var(--header-h);height:calc(100vh - var(--header-h));border:0;border-right:1px solid var(--rule);background:#fbfcfa;border-radius:0;max-height:none;padding:18px 16px 28px;position:sticky;overflow-y:auto}.tree-head{gap:12px;margin-bottom:14px;display:grid}.tree-head b{font-size:1.15rem}.tree-all{border:1.5px solid var(--rule);color:var(--ink);background:#fff;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:12px;font-size:.95rem;font-weight:700;text-decoration:none;display:flex}.tree-all:hover{border-color:var(--q);color:var(--q)}.tt-list{gap:10px;margin:0;padding:0;list-style:none;display:grid}.tt>details{border:1.5px solid var(--rule);background:#fff;border-radius:14px;overflow:hidden}.tt>details[open]{border-color:var(--q-mid)}.tt summary,.ts summary{cursor:pointer;align-items:center;gap:10px;list-style:none;display:flex}.tt summary::-webkit-details-marker{display:none}.ts summary::-webkit-details-marker{display:none}.tt>details>summary{padding:14px 14px 14px 16px}.tt>details>summary>span{flex:1;gap:2px;min-width:0;display:grid}.tt>details>summary b{font-size:1rem;line-height:1.3}.tt>details>summary small{color:var(--faint);font-size:.82rem;font-weight:600}.chev{background:var(--tint);width:30px;height:30px;color:var(--ink-soft);border-radius:50%;flex-shrink:0;padding:6px;transition:transform .2s}details[open]>summary>.chev{background:var(--q-wash);color:var(--q);transform:rotate(180deg)}.ts-list{border-top:1px solid var(--rule);gap:2px;margin:0;padding:4px 10px 12px;list-style:none;display:grid}.ts>details>summary{padding:10px 6px;font-size:.95rem;font-weight:700;line-height:1.3}.ts>details>summary>span{flex:1;min-width:0}.ts>details>summary .chev{width:26px;height:26px;padding:5px}.tl-list{border-left:2px solid var(--rule);gap:2px;margin:0 0 6px 11px;padding:0 0 0 4px;list-style:none;display:grid}.tl-item{color:var(--ink-soft);border-radius:10px;align-items:flex-start;gap:10px;padding:9px 10px;font-size:.92rem;line-height:1.3;text-decoration:none;display:flex;position:relative}.tl-list .tl-item{margin-left:8px}.tl-item:hover{background:var(--tint);color:var(--ink)}.tl-item[aria-current=page]{background:var(--q-wash);color:var(--ink);font-weight:700}.dot{background:#d6dbe3;border-radius:50%;flex-shrink:0;width:12px;height:12px}.tl-list .dot{margin-left:-29px;box-shadow:0 0 0 3px #fff}.tl-item .dot{margin-top:calc(.65em - 6px)}.ts>details>summary{align-items:flex-start}.ts>details>summary .dot.ring{margin-top:calc(.65em - 7px)}.ts>details>summary .chev{margin-top:calc(.65em - 13px)}.tl-item[aria-current=page] .dot{background:var(--q)}.dot.ring{background:#fff;border:2px solid #c9cfd8;width:14px;height:14px}.ts>details[open]>summary .dot.ring{border-color:var(--q)}@media (max-width:1180px){.study{grid-template-columns:minmax(0,1fr)}.tree{border-right:0;border-bottom:1px solid var(--rule);background:#fff;height:auto;padding:0;position:static}.tree-toggle{width:100%;padding:14px var(--gutter);font:inherit;cursor:pointer;text-align:left;color:var(--ink);background:0 0;border:0;align-items:center;gap:10px;font-weight:800;display:flex}.tree-toggle b{color:var(--faint);text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;font-size:.9rem;font-weight:600;overflow:hidden}.tree-toggle i{color:var(--q);margin-left:auto;font-size:1.3rem;font-style:normal}.tree-body{padding:0 var(--gutter) 16px;display:none}.tree[data-open] .tree-body{display:block}.tree-head b{display:none}}.tree{scrollbar-width:thin;scrollbar-color:#d6dbe3 transparent}.q-hero.slim.kind-hero h1{font-size:clamp(1.7rem,3vw,2.5rem)}.study-main .q-hero.slim.kind-hero h1{max-width:40ch;font-size:clamp(1.6rem,2.4vw,2.2rem)}.course-main .zone.kinds-zone{padding-top:clamp(24px,3vw,36px);padding-bottom:0!important}.course-main .zone.kinds-zone+.zone{padding-top:clamp(40px,5vw,56px)}.course-main .kinds-head{margin:0 0 16px}.course-main .kinds-head+.paper-groups,.course-main .kinds-head+*{margin-top:0}.course-nav{border-right:0}.course-main .q-hero+.zone,.course-main .q-hero+.zone.kinds-zone{padding-top:clamp(22px,3vw,32px)}.course-main .zone{padding-bottom:clamp(40px,5vw,64px)}.course-main .zone.kinds-zone+.zone:not(.tint){padding-top:clamp(40px,5vw,56px)!important}.course-shell{background:linear-gradient(90deg,#f7f9f6 0 235px,#d5dcd2 235px 236px,#0000 236px)}.course-nav{background:0 0}.tree{border-right:1px solid #d5dcd2}@media (max-width:980px){.course-shell{background:0 0}.course-nav{background:#fff;border-bottom:1px solid #d5dcd2}}@media (max-width:1180px){.tree{border-bottom:1px solid #d5dcd2;border-right:0}}.kind{grid-template-rows:auto 1fr auto;align-content:start}.course-main .zone.kinds-zone+.zone .kinds-head{margin-bottom:22px}main .q-hero+.zone{padding-top:clamp(28px,4vw,44px)}.hero-search{border:1.5px solid var(--rule);background:#fff;border-radius:999px;gap:8px;max-width:520px;padding:6px;display:flex;box-shadow:0 6px 20px #14281e0f}.hero-search:focus-within{border-color:var(--q,#2e7d32)}.hero-search input{min-width:0;font:inherit;color:var(--ink);background:0 0;border:0;outline:0;flex:1;padding:8px 14px;font-size:1rem}.hero-search .btn{border-radius:999px;padding-inline:20px}.kind-grid .kind b{align-items:center;gap:10px;display:flex}.kind-grid .kind b svg{color:var(--q);flex-shrink:0}.res-hub{gap:clamp(36px,5vw,52px);display:grid}.pick-board h3{color:var(--q);font-size:1.4rem}.tools-all{color:var(--q);margin-top:10px;padding:0 10px;font-size:.9rem;font-weight:800;display:block}.hero-search{box-sizing:border-box;width:100%}.hero-search input{width:100%}.hero-copy{min-width:0}@media (max-width:420px){.hero-search .btn{padding-inline:14px}}.pt-list{gap:2px;margin:0;padding:0;list-style:none;display:grid}.pt-list .tl-item .dot{margin-top:calc(.494rem - 6px)}.pt-list .tl-item>span{min-width:0}.pt-list small{color:var(--faint);margin-bottom:1px;font-size:.76rem;font-weight:700;display:block}.pt-list .tl-item[aria-current=page] small{color:var(--q)}.lr-kicker{color:var(--q);letter-spacing:.01em;font-size:.78rem;font-weight:800}.lr-actions .pdf-link{padding:6px 2px}.prac-note-link{color:var(--q);font-size:.92rem;font-weight:800}.prac-sheet{min-width:0;display:block}.prac-answers,.prac-answers-body,.prac-qs>*{min-width:0}.prac-links .btn{white-space:normal;text-align:left;max-width:100%}.prac-official{background:var(--tint);color:var(--ink-soft);border-radius:12px;margin:0 0 4px;padding:12px 16px;font-size:.95rem}.prac-sec{min-width:0;padding-top:26px}.prac-sec>h2{margin:0 0 12px;font-size:clamp(1.3rem,2.4vw,1.6rem)}.prac-sec>p:last-child{margin-bottom:0}.prac-hint{color:var(--faint);font-size:.92rem;font-weight:600}.prac-equip{columns:2 280px;column-gap:32px;margin:0;padding-left:20px}.prac-equip li{break-inside:avoid;margin-bottom:6px}.article .prac-vars table{min-width:0}.prac-vars th[scope=row]{background:#fafbfd;width:9.5em}.prac-vars ul{margin:0;padding-left:18px}.prac-vars li{margin:0 0 3px}.prac-table th[scope=row]{font-weight:700}.article .prac-table table{min-width:600px}.article .prac-table th,.article .prac-table td{width:33%}.prac-blank td{min-width:90px;height:44px}.prac-blank .table-wrap{margin-top:8px}.prac-answers{border:1.5px solid var(--q-mid);background:#fff;border-radius:14px;margin-top:30px}.prac-answers>summary{cursor:pointer;background:var(--q-wash);border-radius:14px;align-items:center;gap:12px;padding:16px 18px;list-style:none;display:flex}.prac-answers>summary::-webkit-details-marker{display:none}.prac-answers>summary>span{flex:1;gap:2px;min-width:0;display:grid}.prac-answers>summary b{font-size:1.12rem}.prac-answers>summary small{color:var(--ink-soft);font-size:.88rem;font-weight:600}.prac-answers>summary:after{content:"Show";color:#fff;background:var(--q);border-radius:999px;flex-shrink:0;padding:7px 14px;font-size:.88rem;font-weight:800}.prac-answers[open]>summary{border-bottom:1px solid var(--q-mid);border-radius:14px 14px 0 0}.prac-answers[open]>summary:after{content:"Hide"}.prac-answers-body{min-width:0;padding:0 clamp(14px,2.4vw,22px) 22px}.prac-qs{gap:12px;display:grid}.prac-sec .tip{margin:10px 0}@media (max-width:640px){.prac-equip{columns:1}.prac-vars th[scope=row]{width:6.5em}.prac-answers>summary{padding:14px}.article .prac-table table{min-width:0}.prac-table thead{display:none}.prac-table table,.prac-table tbody,.prac-table tr,.article .prac-table th,.article .prac-table td{width:auto;display:block}.prac-table tr+tr{border-top:6px solid var(--tint)}.article .prac-table th,.article .prac-table td{border-top:0;padding:4px 12px}.article .prac-table tr>:first-child{padding-top:10px}.article .prac-table tr>:last-child{padding-bottom:12px}.prac-table [data-label]:before{content:attr(data-label);color:var(--faint);text-transform:uppercase;letter-spacing:.04em;font-size:.74rem;font-weight:800;display:block}}.site-search:focus-within,.hero-search:focus-within,.search-field:focus-within{outline:3px solid var(--q,#2e7d32);outline-offset:2px;border-color:var(--q,#2e7d32)}.site-search:focus-within{background:#fff}.fan .tag{background-image:linear-gradient(#00000047,#00000047)}.search-results a:focus-visible{outline:3px solid var(--q);outline-offset:2px;border-color:var(--q)}.search-results mark{color:inherit;background:#fff1a8;border-radius:3px;padding:0 1px}.search-group{gap:8px;scroll-margin-top:90px;display:grid}.search-group h2{margin:10px 0 0;font-size:1.05rem}.search-group .n,.search-kinds .n{color:var(--faint);margin-left:4px;font-weight:700}.search-kinds .chip{text-decoration:none}.search-did{margin:0;font-weight:600}.search-empty{gap:10px;display:grid}.search-empty p{margin:0}.link-btn{font:inherit;color:var(--q);cursor:pointer;background:0 0;border:0;padding:0;font-weight:700;text-decoration:underline}.search-more{justify-self:start}.sh-where{color:var(--faint);font-size:.86rem;font-weight:600}.sh-grid{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:16px;display:grid}.sh-card{border:1.5px solid var(--rule);background:#fff;border-radius:16px;justify-items:start;gap:10px;min-width:0;padding:18px;display:grid}.sh-card h2{margin:0;font-size:1.15rem}.sh-card .btn{padding:9px 18px}.sh-notes{grid-column:1/-1}.sh-what{color:var(--ink-soft);margin:0}.sh-list{justify-self:stretch;gap:6px;margin:0;padding:0 0 0 22px;display:grid}.sh-notes .sh-list{columns:2;column-gap:40px;display:block}.sh-notes .sh-list li{break-inside:avoid;margin-bottom:6px}.sh-list li{padding-left:2px}.sh-list a{color:var(--ink);font-weight:600;text-decoration:none}.sh-list a:hover{color:var(--q);text-decoration:underline}.sh-list .flag-badges{margin-left:6px}.sh-tag{color:#2e7d4a;vertical-align:middle;background:#e3f4e8;border-radius:6px;margin-left:8px;padding:1px 7px;font-size:.72rem;font-weight:800}.sh-pdfs{gap:2px;display:grid}.sh-pdfs .pdf-link{padding:5px 0}@media (max-width:900px){.sh-grid{grid-template-columns:minmax(0,1fr)}.sh-notes .sh-list{columns:1}}@media (max-width:640px){.sh-card{padding:14px}.sh-card .btn{justify-content:center;width:100%}}.practise-this{gap:8px;padding:10px 14px}.practise-this .btn{padding:7px 14px;font-size:.92rem}.practise-this .btn .n{background:#00000012;border-radius:999px;margin-left:4px;padding:1px 7px;font-size:.74rem;font-weight:800}.practise-this .btn.q-btn .n{background:#ffffff40}@media (max-width:640px){.practise-this b{flex-basis:100%}}.labels-box{border:1.5px solid var(--rule);background:#fff;border-radius:16px;gap:10px;padding:18px 20px;scroll-margin-top:90px;display:grid}.labels-box h2{margin:0;font-size:1.2rem}.labels-box dl{grid-template-columns:max-content minmax(0,1fr);align-items:baseline;gap:10px 14px;margin:0;display:grid}.labels-box dd{color:var(--ink-soft);margin:0}.labels-box:target{border-color:var(--q)}@media (max-width:520px){.labels-box dl{grid-template-columns:minmax(0,1fr);gap:4px}.labels-box dd{margin-bottom:8px}}.nf{grid-template-columns:minmax(0,1fr);justify-items:start;gap:16px;display:grid}.nf>*{max-width:100%}.nf-search{gap:8px;width:100%;max-width:560px;display:flex}.nf-search input{min-width:0;font:inherit;border:1.5px solid var(--rule);color:var(--ink);background:#fff;border-radius:12px;flex:1;padding:11px 14px}.nf-search input:focus-visible{outline:2px solid var(--q,#5b3fb8);outline-offset:1px}.hub-sub li a{color:var(--ink)}.hub-sub ol li::marker{font-family:var(--print);letter-spacing:0}.mcq li::marker{font-family:var(--print);letter-spacing:0}.quick ol li::marker{font-family:var(--print);letter-spacing:0}.study-body>.article.gen-worksheet{box-shadow:none;background:0 0;border:0;border-radius:0;gap:12px;padding:0;display:grid}.study-body>.article.gen-worksheet .examq{margin:0}.examq{border-color:var(--card-rule);grid-template-columns:32px minmax(0,1fr) auto;align-items:start;column-gap:12px;display:grid}.examq-head{display:contents}.examq .qn{text-align:center;grid-column:1;justify-self:stretch;padding:2px 0;line-height:1.5}.examq-text{grid-column:2;font-weight:500}.examq .mk{grid-column:3}.examq>details{grid-column:2/-1}@media (max-width:640px){.examq{grid-template-columns:32px minmax(0,1fr);row-gap:8px}.examq .mk{grid-area:1/2;justify-self:end}.examq-text,.examq>details{grid-column:1/-1}}.cookie-bar{border-top:1px solid var(--card-rule);max-width:none;padding:12px max(var(--gutter), calc((100vw - 1200px) / 2 + var(--gutter)));border-radius:0;justify-content:space-between;margin:0;bottom:0;left:0;right:0;box-shadow:0 -6px 24px #14213d14}.cookie-bar p{flex:320px}@media (min-width:1100px){.cookie-bar{flex-wrap:nowrap;padding-block:8px}.cookie-bar p{flex:auto}.cookie-bar .btn{padding:6px 14px}}html.has-cookie-bar body{padding-bottom:var(--cookie-h,72px)}@media (max-width:560px){.cookie-bar{flex-wrap:nowrap;gap:8px 12px;padding:10px 16px}.cookie-bar p{flex:auto;font-size:.8rem;line-height:1.35}.cookie-bar div{flex-direction:column;flex-shrink:0;gap:6px}.cookie-bar .btn{padding:6px 12px;font-size:.84rem}}.search-course{color:var(--ink-soft);flex-wrap:wrap;align-items:center;gap:10px;font-weight:700;display:inline-flex}.search-course select{font:inherit;color:var(--ink);border:1.5px solid var(--rule);cursor:pointer;appearance:none;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%231C1E26' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") right 14px center no-repeat;border-radius:12px;max-width:100%;min-height:44px;padding:10px 40px 10px 14px;font-weight:600}.search-course select:focus-visible{outline:3px solid var(--q,#2e7d32);outline-offset:2px}@media (max-width:480px){.search-course{width:100%;display:grid}.search-course select{width:100%}}.in-short{background:var(--q-wash);border-left:4px solid var(--q);border-radius:0 12px 12px 0;max-width:72ch;margin:0 0 22px;padding:12px 18px 14px}.article .in-short p{margin:0}.article .in-short .in-short-label{letter-spacing:.07em;text-transform:uppercase;color:var(--q);margin-bottom:4px;font-size:.76rem;font-weight:800}@media (max-width:640px){.in-short{padding:10px 14px 12px}}.faq h2{margin:0 0 8px;font-size:1.15rem}.faq-item{border-top:1px solid var(--rule);padding:12px 0}.faq-item:first-of-type{border-top:0;padding-top:6px}.faq-item h3{margin:0 0 4px;font-size:1.02rem}.faq-item p{max-width:72ch;margin:0}.faq-item .flag-badges{margin-right:4px}.faq-more{margin:6px 0 0;font-weight:700}.study-body>.faq{border:1.5px solid var(--rule);background:#fff;border-radius:16px;padding:18px}@media (max-width:640px){.study-body>.faq{padding:14px}}.trust-line{color:var(--faint);margin:0;font-size:.86rem}.article .trust-line{border-top:1px solid var(--rule);margin:28px 0 0;padding-top:12px}.trust-line a{color:inherit;text-underline-offset:2px;text-decoration:underline}.trust-line a:hover{color:var(--q)}.sh-wide{grid-column:1/-1;justify-items:stretch}.sh-keypoints{justify-self:stretch;gap:14px;margin:0;padding:0 0 0 22px;display:grid}.sh-keypoints li{padding-left:2px}.sh-keypoints li::marker{color:var(--faint);font-weight:800}.sh-kp-head{flex-wrap:wrap;align-items:baseline;gap:4px 8px;display:flex}.sh-kp-head h3{margin:0;font-size:1.02rem}.sh-kp-head h3 a{color:var(--ink);text-decoration:none}.sh-kp-head h3 a:hover{color:var(--q);text-decoration:underline}.sh-kp-head .sh-tag{margin-left:0}.sh-keypoints p{color:var(--ink-soft);max-width:75ch;margin:3px 0 0}.sh-quick .quick{background:0 0;margin:0;padding:0}.sh-quick .quick h2{margin:0 0 8px;font-size:1.15rem}@property --nav-w{syntax:"<length>";inherits:true;initial-value:236px}.cn-head{border-bottom:1px solid var(--rule);justify-content:center;display:flex;position:relative}.cn-head .cn-course{border-bottom:0;flex:1;min-width:0}.cn-head .cn-course b{padding-right:34px}.cn-toggle{border:1.5px solid var(--rule);width:32px;height:32px;color:var(--ink-soft);cursor:pointer;background:#fff;border-radius:10px;justify-content:center;align-items:center;padding:0;display:flex;position:absolute;top:0;right:0}.cn-toggle:hover{background:var(--tint);color:var(--ink)}.cn-toggle:focus-visible{outline:2px solid var(--q);outline-offset:2px}.cn-when-mini,html[data-nav=mini] .cn-when-full{display:none}html[data-nav=mini] .cn-when-mini{display:inline}@media (min-width:981px){.course-shell{--nav-w:236px;grid-template-columns:var(--nav-w) minmax(0, 1fr);background:linear-gradient(to right, #f7f9f6 0, #f7f9f6 calc(var(--nav-w) - 1px), #d5dcd2 calc(var(--nav-w) - 1px), #d5dcd2 var(--nav-w), transparent var(--nav-w));transition:--nav-w .2s}.course-nav{z-index:7;overflow-x:hidden}.course-nav li a{white-space:nowrap}.course-nav li a svg{flex-shrink:0}html[data-nav=mini] .course-shell{--nav-w:64px}html[data-nav=mini] .cn-head{padding-bottom:12px}html[data-nav=mini] .cn-toggle{position:static}html[data-nav=mini] .cn-course{display:none}html[data-nav=mini] .course-nav li a{justify-content:center;padding-inline:0}.course-nav .cn-tip{--tip-x:20px}.course-nav .cn-toggle .cn-tip{--tip-x:19px}.course-nav .cn-toggle .cn-tip,html[data-nav=mini] .course-nav .cn-tip{z-index:60;clip:rect(0 0 0 0);white-space:nowrap;pointer-events:none;width:1px;height:1px;margin:-1px;padding:0;position:fixed;overflow:hidden}.course-nav .cn-toggle:hover .cn-tip,.course-nav .cn-toggle:focus-visible .cn-tip,html[data-nav=mini] .course-nav li a:hover .cn-tip,html[data-nav=mini] .course-nav li a:focus-visible .cn-tip{clip:auto;background:var(--ink);color:#fff;letter-spacing:.005em;width:auto;height:auto;transform:translateX(calc(50% + var(--tip-x)));border-radius:8px;margin:0;padding:6px 10px;font-size:.84rem;font-weight:500;line-height:1.2;animation:.12s ease-out cn-tip-in;overflow:visible;box-shadow:0 6px 16px #14213d33,0 1px 3px #14213d29}.course-nav .cn-toggle .cn-tip:before,html[data-nav=mini] .course-nav .cn-tip:before{content:"";background:var(--ink);border-radius:1.5px;width:8px;height:8px;position:absolute;top:50%;left:-4px;transform:translateY(-50%)rotate(45deg)}}@keyframes cn-tip-in{0%{opacity:0;transform:translateX(calc(50% + var(--tip-x) - 4px))}to{opacity:1;transform:translateX(calc(50% + var(--tip-x)))}}@media (min-width:981px) and (prefers-reduced-motion:reduce){.course-shell{transition:none}.course-nav .cn-tip{animation:none!important}}@media (max-width:980px){.cn-head{display:none}}.video-topic{gap:14px;display:grid}.video-topic-grid{padding:4px 0 18px}.soon-chip{color:var(--ink-soft);background:var(--paper,#f4f4f0);border:1px solid var(--card-rule);white-space:nowrap;border-radius:999px;padding:4px 12px;font-size:.85rem;font-weight:700}.sh-video-row{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);align-items:center;gap:20px;width:100%;display:grid}.sh-video-row>div:first-child{border-radius:12px}.sh-video-row h3{margin:0 0 6px;font-size:1.15rem}@media (max-width:760px){.sh-video-row{grid-template-columns:1fr}}
.Header-module__Af2_WG__srOnly{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.Header-module__Af2_WG__panel{grid-template-columns:minmax(0,1.75fr) minmax(320px,1fr);column-gap:32px;line-height:1.3;display:grid}.Header-module__Af2_WG__head{letter-spacing:.07em;text-transform:uppercase;color:var(--faint);margin-bottom:10px;font-size:.75rem;font-weight:800;line-height:1.2;display:block}.Header-module__Af2_WG__qualHead{color:var(--q)}.Header-module__Af2_WG__types{grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:24px;display:grid}.Header-module__Af2_WG__typeList,.Header-module__Af2_WG__boards{gap:2px;margin:0;padding:0;list-style:none;display:grid}.Header-module__Af2_WG__type{color:var(--ink);border-radius:10px;grid-template-columns:36px minmax(0,1fr);align-items:center;column-gap:12px;margin-inline:-10px;padding:8px 10px;text-decoration:none;display:grid}.Header-module__Af2_WG__type:hover{background:var(--tint)}.Header-module__Af2_WG__icon{background:var(--tint);width:36px;height:36px;color:var(--ink);border-radius:9px;grid-row:1/3;place-items:center;display:grid}.Header-module__Af2_WG__type:hover .Header-module__Af2_WG__icon{background:#fff}.Header-module__Af2_WG__type b{font-size:.95rem;font-weight:700}.Header-module__Af2_WG__what{color:var(--faint);font-size:.84rem}.Header-module__Af2_WG__courses{border-left:1px solid var(--rule);align-content:start;gap:22px;padding-left:28px;display:grid}.Header-module__Af2_WG__board{grid-template-columns:6rem minmax(0,1fr);align-items:baseline;font-size:.95rem;display:grid}.Header-module__Af2_WG__boardName{color:var(--ink);font-weight:700}.Header-module__Af2_WG__courseLinks,.Header-module__Af2_WG__fLinks,.Header-module__Af2_WG__bottomLinks{flex-wrap:wrap;column-gap:18px;display:flex}.Header-module__Af2_WG__courseLinks>a+a,.Header-module__Af2_WG__fLinks>a+a,.Header-module__Af2_WG__bottomLinks>a+a{position:relative}.Header-module__Af2_WG__courseLinks>a+a:before,.Header-module__Af2_WG__fLinks>a+a:before,.Header-module__Af2_WG__bottomLinks>a+a:before{content:"·";content:"·" / "";color:var(--faint);pointer-events:none;position:absolute;left:-12px}.Header-module__Af2_WG__course{white-space:nowrap;color:var(--ink);padding-block:6px;font-weight:600;text-decoration:none}.Header-module__Af2_WG__course:hover,.Header-module__Af2_WG__bottomLinks a:hover{color:var(--q);text-underline-offset:3px;text-decoration:underline}.Header-module__Af2_WG__bottom{border-top:1px solid var(--rule);flex-wrap:wrap;grid-column:1/-1;justify-content:space-between;align-items:baseline;gap:6px 24px;margin-top:18px;padding-top:14px;font-size:.9rem;display:flex}.Header-module__Af2_WG__bottomLinks a{color:var(--ink);padding-block:4px;font-weight:600;text-decoration:none}.Header-module__Af2_WG__bottomLinks a.Header-module__Af2_WG__all{font-weight:800}.Header-module__Af2_WG__soon{color:var(--faint)}.Header-module__Af2_WG__soon a{color:var(--ink-soft);text-underline-offset:3px}.Header-module__Af2_WG__soon a:hover{color:var(--ink)}.Header-module__Af2_WG__footer{padding-block:52px 28px}.Header-module__Af2_WG__footer :focus-visible{outline-color:#fff}.Header-module__Af2_WG__fGrid{grid-template-columns:minmax(0,1.1fr) minmax(0,1.45fr) minmax(0,.8fr) minmax(0,.6fr);gap:40px;line-height:1.35;display:grid}.Header-module__Af2_WG__fGrid ul{gap:2px;margin:0;padding:0;list-style:none;display:grid}.Header-module__Af2_WG__fGrid a{color:#d5dae6;text-decoration:none}.Header-module__Af2_WG__fGrid a:hover{color:#fff;text-underline-offset:3px;text-decoration:underline}.Header-module__Af2_WG__fCol a,.Header-module__Af2_WG__fLinks a{white-space:nowrap;padding-block:5px;font-size:.95rem;display:inline-block}.Header-module__Af2_WG__fHead{letter-spacing:.08em;text-transform:uppercase;color:#fff;margin:0 0 12px;font-size:.78rem;font-weight:800;line-height:1.2}.Header-module__Af2_WG__fBrand{align-content:start;gap:14px;display:grid}.Header-module__Af2_WG__fBrand p{color:#c9cfdd;max-width:30ch;margin:0;font-size:.95rem}.Header-module__Af2_WG__fGrid a.Header-module__Af2_WG__fCta{color:var(--ink);justify-self:start;text-decoration:none}.Header-module__Af2_WG__fQual{grid-template-columns:4rem minmax(0,1fr);align-items:baseline;margin-bottom:10px;display:grid}.Header-module__Af2_WG__fQualName{color:#fff;font-size:.95rem;font-weight:800}.Header-module__Af2_WG__fBoard{grid-template-columns:6rem minmax(0,1fr);align-items:baseline;display:grid}.Header-module__Af2_WG__fBoardName{color:#aab2c5;font-size:.95rem;font-weight:600}.Header-module__Af2_WG__fLinks>a+a:before{color:#aab2c5}.Header-module__Af2_WG__fSoon{color:#aab2c5;margin:4px 0 0;font-size:.9rem}.Header-module__Af2_WG__fGrid .Header-module__Af2_WG__fSoon a{text-underline-offset:3px;text-decoration:underline}.Header-module__Af2_WG__fGrid a.Header-module__Af2_WG__fAll{color:#fff;font-weight:700}.Header-module__Af2_WG__fLegal{color:#a3abbe;border-top:1px solid #ffffff24;flex-wrap:wrap;justify-content:space-between;gap:6px 24px;margin-top:36px;padding-top:18px;font-size:.85rem;display:flex}@media (max-width:1100px){.Header-module__Af2_WG__fGrid{grid-template-columns:minmax(0,1.75fr) minmax(0,.8fr) minmax(0,.6fr)}.Header-module__Af2_WG__fBrand{grid-column:1/-1}}@media (max-width:760px){.Header-module__Af2_WG__fGrid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px 24px}.Header-module__Af2_WG__fCourses{grid-column:1/-1}.Header-module__Af2_WG__fCol a,.Header-module__Af2_WG__fLinks a{padding-block:10px}.Header-module__Af2_WG__fCta{min-height:44px}.Header-module__Af2_WG__fSoon{line-height:2.4}}@media (max-width:480px){.Header-module__Af2_WG__fQual{grid-template-columns:minmax(0,1fr);margin-bottom:14px}.Header-module__Af2_WG__fQualName{margin-bottom:2px}.Header-module__Af2_WG__fBoard{grid-template-columns:5.5rem minmax(0,1fr)}}.Header-module__Af2_WG__mSearch svg{flex-shrink:0}.Header-module__Af2_WG__header .search-btn{flex-shrink:0;justify-content:center;align-items:center;min-width:44px;min-height:44px;padding:0}:is(.Header-module__Af2_WG__header .search-btn svg,.Header-module__Af2_WG__header .menu-btn){flex-shrink:0}@media (max-width:900px){.Header-module__Af2_WG__header .bar{gap:10px}.Header-module__Af2_WG__header .brand-link{flex-shrink:1;min-width:0}}@media (max-width:420px){.Header-module__Af2_WG__header .logo-mark{width:auto;height:42px}.Header-module__Af2_WG__header .logo-word{font-size:17px!important}}@media (max-width:350px){.Header-module__Af2_WG__header .logo-mark{height:32px}.Header-module__Af2_WG__header .logo-word{font-size:15px!important}.Header-module__Af2_WG__header .menu-btn{padding:7px 10px}}.Header-module__Af2_WG__drop{display:contents}.Header-module__Af2_WG__header .search-btn{font:inherit;cursor:pointer;background:0 0;border:0}.Header-module__Af2_WG__header .search-btn[aria-expanded=true]{background:var(--tint)}.Header-module__Af2_WG__sheet{border-bottom:1px solid var(--rule);background:#fff;padding:12px 0 14px;position:absolute;top:100%;left:0;right:0;box-shadow:0 12px 28px #14213d1f}.Header-module__Af2_WG__sheet[hidden]{display:none}@media (min-width:901px){.Header-module__Af2_WG__sheet{display:none}}.Header-module__Af2_WG__header .bar{max-width:none;min-height:84px;padding-inline:clamp(16px,3vw,48px)}@media (max-width:900px){.Header-module__Af2_WG__header .bar{min-height:68px}}