.seo-surface{--seo-accent:color-mix(in oklab, rgb(var(--subject-rgb)) 60%, #0f172a);color:#1e293b;min-height:100vh}.seo-surface-embedded{background:0 0}.seo-page{--seo-accent:color-mix(in oklab, rgb(var(--subject-rgb,77, 182, 255)) 60%, #0f172a);color:#1e293b;max-width:1180px;margin:auto;padding:28px 24px 64px}.seo-page h1:where(:not(.seo-practice *)){letter-spacing:-.025em;text-wrap:balance;max-width:940px;font-size:36px;font-weight:700;line-height:1.25}.seo-page h2:where(:not(.seo-practice *)){letter-spacing:-.015em;margin:0 0 20px;font-size:24px;font-weight:700;line-height:1.35}.seo-page h3:where(:not(.seo-practice *)){font-size:18px;font-weight:700;line-height:1.4}.seo-crumbs{margin:0 20px 24px}.seo-crumb-current{flex:0 auto;min-width:0;max-width:100%}.seo-crumb-current>[aria-current=page]{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.seo-intro{border-radius:28px;padding:28px 32px}.seo-lead{color:#64748b;max-width:800px;margin-top:16px;font-size:16px;line-height:1.65}.seo-actions{flex-wrap:wrap;align-items:center;gap:12px;margin:22px 0;display:flex}.seo-intro>.seo-actions:last-child,.seo-intro .seo-hero-grid .seo-actions{margin-bottom:0}.seo-button,.seo-quiet,.seo-card-action{text-align:center;border-radius:999px;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px 22px;font-size:15px;font-weight:600;line-height:1.4;text-decoration:none;display:inline-flex}.seo-button{color:#fff}.seo-quiet,.seo-card-action{color:#334155}.seo-card{border-radius:26px;min-width:0;padding:24px}.seo-section{margin-top:28px;scroll-margin-top:110px}.seo-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.seo-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.seo-card p{color:#64748b;margin-top:10px;font-size:15px;line-height:1.65}.seo-cover{aspect-ratio:16/9;object-fit:cover;background:rgba(var(--subject-rgb), .08);border:1px solid #fffc;border-radius:20px;width:100%;height:auto;display:block}.seo-hero-grid{grid-template-columns:1.1fr 1fr;align-items:center;gap:28px;display:grid}.seo-hero-grid h1{font-size:30px}.seo-card-link{flex-direction:column;padding:8px 8px 16px;transition:transform .18s;display:flex}.seo-card-link:hover{transform:translateY(-3px)}.seo-card-link h3{margin:16px 12px 0;font-size:18px}.seo-card-link p{margin:10px 12px 20px;font-size:15px}.seo-card-action{align-self:flex-start;min-height:38px;margin:auto 12px 0;padding:8px 0;font-size:15px}.seo-card a:not(.seo-button):not(.seo-quiet):not(.plexi-pill):not(.plexi-primary),.seo-prose a{color:var(--seo-accent);text-underline-offset:4px;text-decoration:underline}.seo-prose{overflow-wrap:anywhere;color:#475569;font-size:16px;line-height:1.75}.seo-prose p{font-size:inherit;color:inherit;margin:14px 0}.seo-prose>:first-child{margin-top:0}.seo-prose>:last-child{margin-bottom:0}.seo-prose h2,.seo-prose h3{color:#1e293b;margin-top:28px}.seo-prose ul,.seo-prose ol{list-style:revert;margin:16px 0;padding-left:22px}.seo-prose li{margin:7px 0}.seo-prose blockquote{border-left:3px solid rgba(var(--subject-rgb), .65);background:#fff6;border-radius:0 16px 16px 0;padding:12px 18px}.seo-prose table{border-collapse:separate;border-spacing:0;background:#ffffff52;border:1px solid #fffc;border-radius:18px;width:100%;margin:22px 0;font-size:15px;display:block;overflow-x:auto}.seo-prose th,.seo-prose td{text-align:left;border-bottom:1px solid #94a3b829;min-width:95px;padding:12px 16px}.seo-prose th{color:#334155;background:#ffffff73;font-weight:600}.seo-prose tr:last-child td{border-bottom:0}.seo-prose .katex-display{padding:8px 0;overflow:auto hidden}.seo-faq details{border-bottom:1px solid #94a3b82e}.seo-faq details:last-child{border-bottom:0}.seo-faq summary{cursor:pointer;color:#334155;justify-content:space-between;align-items:center;gap:16px;padding:18px 0;font-size:15px;font-weight:600;list-style:none;display:flex}.seo-faq summary::-webkit-details-marker{display:none}.seo-faq summary:after{content:"+";color:var(--seo-accent);font-size:22px;font-weight:400}.seo-faq details[open] summary:after{content:"−"}.seo-faq details .seo-prose{padding-bottom:16px}.seo-links{flex-wrap:wrap;gap:8px;display:flex}.seo-links a{color:#475569;border-radius:999px;align-items:center;min-height:40px;padding:9px 15px;font-size:13px;font-weight:500;text-decoration:none;display:inline-flex}.seo-links a:hover{color:var(--seo-accent)}.seo-answer{color:var(--seo-accent);border-radius:16px;margin:16px 0;padding:12px 14px;font-size:15px}.seo-answer summary{cursor:pointer;font-weight:600}.seo-number-strip{flex-wrap:wrap;gap:8px;margin-top:20px;display:flex}.seo-number-strip a{color:#475569;border-radius:50%;justify-content:center;align-items:center;min-width:44px;min-height:44px;font-size:15px;display:flex}.seo-number-strip a[aria-current]{color:#fff}.seo-empty{color:#64748b;padding:22px;font-size:15px}.seo-calc-fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;max-width:720px;display:grid}.seo-calc label{color:#64748b;flex-direction:column;gap:8px;font-size:13px;font-weight:500;display:flex}.seo-calc input,.seo-calc select{color:#334155;border-radius:16px;width:100%;min-height:48px;padding:12px 16px;font-size:15px}.seo-calc output{color:#1e293b;border-radius:20px;max-width:720px;margin:20px 0;padding:22px;font-size:24px;font-weight:700;display:block}.seo-page audio{border-radius:999px;margin:16px 0}.seo-page a:focus-visible,.seo-page summary:focus-visible,.seo-page button:focus-visible{outline:3px solid rgba(var(--subject-rgb), .8);outline-offset:4px}@media (min-width:1024px){.seo-embedded{width:calc(100% - 160px)}}@media (min-width:768px) and (max-width:1050px){.seo-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:767px){.seo-page{padding:20px 16px 48px}.seo-grid,.seo-grid.two,.seo-hero-grid,.seo-calc-fields{grid-template-columns:1fr}.seo-intro{border-radius:24px;padding:22px 20px}.seo-card{border-radius:24px;padding:20px}.seo-card-link{padding:8px 8px 16px}.seo-page h1{text-wrap:pretty;font-size:30px}.seo-hero-grid h1{font-size:24px}.seo-hero-grid{gap:20px}.seo-section{margin-top:24px}.seo-lead,.seo-prose{font-size:15px}.seo-actions{gap:10px;margin:20px 0}.seo-button,.seo-quiet{padding:11px 18px}.seo-crumbs{margin:0 0 24px}.seo-intro .seo-links{margin-top:20px}.seo-prose th,.seo-prose td{padding:10px 12px}}@media (prefers-reduced-motion:reduce){.seo-card-link{transition:none}}@media print{.seo-surface{background:#fff}.seo-actions,.seo-crumbs,.seo-number-strip{display:none}.seo-page{color:#000;width:100%;max-width:none;padding:0}.seo-card,.seo-intro{box-shadow:none;border:0;padding:10px 0}.seo-prose table{display:table}.seo-grid{display:block}}.seo-intro{isolation:isolate;position:relative}.seo-intro>:not([aria-hidden=true]){position:relative}.seo-intro .seo-cover{position:relative;box-shadow:0 22px 40px -24px #0d26408c}.seo-intro .seo-cover:hover{transform:none}.seo-meta{color:#64748b;font-size:13px;line-height:1.5}.seo-card p.seo-meta{font-size:13px;line-height:1.5}.seo-actions>a:not(.plexi-primary):not(.plexi-pill){align-items:center;gap:8px;min-height:44px;font-size:14px;line-height:1.5;display:inline-flex}.seo-number-meta{margin-top:14px}.seo-number-heading{align-items:center;gap:32px;display:flex}.seo-number-heading h1{flex:1}.seo-section-nav{flex-wrap:wrap;align-items:center;gap:4px;width:fit-content;max-width:100%;margin-top:20px;padding:0;display:flex}.seo-section-nav a{color:#475569;border-radius:16px;align-items:center;gap:12px;min-height:40px;padding:10px 14px;font-size:15px;font-weight:500;display:inline-flex}.seo-section-nav a:hover{color:var(--seo-accent);background:#ffffff73}.seo-reading-layout{grid-template-columns:minmax(0,1fr) 240px;align-items:start;gap:20px;display:grid}.seo-reading{min-width:0;padding:28px 32px}.seo-reading .seo-prose{max-width:78ch;margin-inline:auto}.seo-reading h2,.seo-reading h3,.seo-reading h4{scroll-margin-top:120px}.seo-toc{border-radius:24px;grid-area:1/2;max-height:calc(100dvh - 140px);padding:20px;position:sticky;top:110px;overflow:auto}.seo-reading-layout>.seo-reading{grid-area:1/1}.seo-toc summary{color:#334155;cursor:pointer;align-items:center;gap:9px;font-size:15px;font-weight:700;list-style:none;display:flex}.seo-toc summary::-webkit-details-marker{display:none}.seo-toc nav{gap:4px;margin-top:14px;display:grid}.seo-toc a{color:#64748b;align-items:baseline;gap:9px;padding:8px 0;font-size:13px;line-height:1.45;display:flex}.seo-toc a:hover{color:var(--seo-accent)}.seo-toc-number{opacity:.7;font-variant-numeric:tabular-nums;font-size:11px}.seo-related-links{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.seo-related-links a{color:#334155;border-radius:18px;justify-content:space-between;align-items:center;gap:18px;min-height:56px;padding:16px 18px;font-size:15px;line-height:1.45;transition:transform .18s;display:flex}.seo-related-links a svg{color:var(--seo-accent);flex-shrink:0}.seo-related-links a:hover{transform:translateY(-2px)}.seo-scale{border-radius:20px;margin-top:16px;padding:0 18px}.seo-scale summary{cursor:pointer;color:#334155;justify-content:space-between;align-items:center;gap:12px;padding:18px 0;font-size:15px;font-weight:600;display:flex}.seo-scale summary span{color:#64748b;font-size:12px;font-weight:400}.seo-scale .seo-prose table{margin-top:0;display:table}.seo-scale .seo-prose{max-height:480px;overflow:auto}.seo-scale thead{position:sticky;top:0}.seo-scale th{background:#ecf7fffa}.seo-catalog-tools{justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;display:flex}.seo-search{color:#64748b;border-radius:999px;flex:1;align-items:center;gap:10px;max-width:540px;min-height:48px;padding:0 16px;display:flex}.seo-search input{background:0 0;outline:none;width:100%;min-width:0;padding:12px 0;font-size:16px}.seo-search button{cursor:pointer;place-items:center;min-width:44px;min-height:44px;display:grid}.seo-catalog-item{min-width:0;display:flex}.seo-catalog-item>a{width:100%}.seo-audio-card h3{align-items:center;gap:10px;display:flex}.seo-audio-card h3 svg{color:var(--seo-accent)}.seo-card-link:focus-visible{transform:translateY(-3px)}.seo-prose table{max-width:100%}.seo-practice .tasksListPage{padding-inline:0}.seo-practice .tasksPageContainer{width:100%;max-width:none}.seo-practice .tasksListHeading{margin-top:16px}@media (max-width:1000px){.seo-reading-layout{grid-template-columns:1fr}.seo-toc{grid-area:auto;max-height:none;position:static}.seo-toc nav{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:20px}.seo-reading-layout>.seo-reading{grid-area:auto}}@media (max-width:767px){.seo-reading{padding:22px 20px}.seo-related-links{grid-template-columns:1fr}.seo-catalog-tools{flex-direction:column;align-items:stretch;gap:10px}.seo-catalog-tools .seo-meta{margin-left:6px}.seo-section-nav{border-radius:20px;gap:0;width:100%}.seo-section-nav a{gap:6px;padding:10px 12px;font-size:15px}.seo-toc nav{grid-template-columns:1fr}.seo-toc{padding:18px 20px}.seo-scale summary{flex-direction:column;align-items:start;gap:4px}.seo-page input,.seo-page select{font-size:16px}.seo-intro .seo-actions{align-items:stretch}.seo-intro .seo-actions>a{flex:auto}}@media (prefers-reduced-motion:reduce){.seo-related-links a{transition:none}}@media print{.seo-toc,.seo-section-nav,.seo-catalog-tools{display:none}.seo-reading-layout{display:block}.seo-scale .seo-prose{max-height:none;overflow:visible}}.seo-calc{grid-template-columns:minmax(0,1fr) 240px;align-items:stretch;gap:20px;display:grid}.seo-calc-fields{grid-template-columns:1fr;gap:16px}.seo-calc output{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:10px;margin:0;font-size:16px;display:flex}.seo-calc output svg{color:var(--seo-accent)}.seo-calc .seo-actions{grid-column:1/-1;margin:0}.seo-score-label{color:#64748b;font-size:13px;font-weight:500}.seo-score-value{color:var(--seo-accent);font-variant-numeric:tabular-nums;letter-spacing:-.05em;font-size:60px;line-height:1}.seo-score-caption{color:#64748b;font-size:12px;font-weight:400}@media (max-width:767px){.seo-calc{grid-template-columns:1fr}.seo-calc output{min-height:160px}.seo-calc .seo-actions>a{width:100%}}.seo-audio-group{border-radius:26px;margin-top:14px;padding:20px}.seo-audio-group>summary{cursor:pointer;align-items:center;gap:12px;min-height:40px;font-weight:650;display:flex}.seo-audio-group>summary span{color:#64748b;margin-left:auto;font-size:13px;font-weight:400}.seo-audio-group[open]>summary{margin-bottom:20px}.seo-search:focus-within{outline:2px solid var(--seo-accent);outline-offset:3px}@media (max-width:600px){.seo-audio-group{padding:14px}.seo-audio-group>summary{flex-wrap:wrap}}.seo-search input::-webkit-search-cancel-button{-webkit-appearance:none}.seo-catalog-nav{border-bottom:1px solid #64748b29;flex-wrap:wrap;gap:4px 24px;margin-top:24px;display:flex}.seo-catalog-nav a{color:#475569;border-bottom:2px solid #0000;align-items:center;min-height:44px;margin-bottom:-1px;padding:8px 0 12px;font-size:15px;font-weight:500;display:inline-flex}.seo-catalog-nav a[aria-current]{border-color:var(--seo-accent);color:var(--seo-accent);font-weight:600}.seo-catalog-nav a:hover{color:var(--seo-accent)}.seo-topic-links{border-radius:24px;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px;margin-top:16px;padding:12px 20px;display:grid}.seo-topic-links a.seo-topic-link{color:#475569;border-bottom:1px solid #64748b26;align-items:center;min-height:48px;padding:12px 0;font-size:15px;line-height:1.5;text-decoration:none;display:flex}.seo-topic-links a:hover{color:var(--seo-accent)}.seo-card .seo-topic-links{grid-template-columns:1fr;padding:0}@media (max-width:767px){.seo-catalog-nav{gap:0 20px;margin-top:20px}.seo-topic-links{grid-template-columns:1fr}}.seo-calc-subject{color:#64748b;gap:8px;font-size:15px;display:grid}.seo-action-control{white-space:normal;text-align:center;height:auto;min-height:44px;padding:10px 20px;font-size:16px;font-weight:600;line-height:1.5}.seo-page{--seo-space:24px}.seo-crumbs{margin-inline:0}.seo-intro{padding:28px}.seo-intro h1{max-width:940px}.seo-card{border-radius:28px}.seo-section{margin-top:32px}.seo-grid{align-items:stretch;gap:20px}.seo-card-link{padding:12px}.seo-card-link .seo-cover{border-radius:22px}.seo-card-link h3{margin:18px 8px 0}.seo-card-link p{-webkit-line-clamp:3;-webkit-box-orient:vertical;margin:10px 8px 18px;display:-webkit-box;overflow:hidden}.seo-card-action{min-height:44px;color:var(--seo-accent);border-top:1px solid #64748b1f;border-radius:0;justify-content:space-between;align-self:stretch;margin:auto 8px 0}.seo-reading{padding:32px}.seo-reading .seo-prose{max-width:68ch}.seo-toc a{min-height:44px;padding-block:10px;font-size:14px}.seo-prose{line-height:1.8}.seo-prose h2{margin-top:36px}.seo-prose h3{margin-top:28px}.seo-calc{grid-template-columns:minmax(0,1fr) minmax(220px,.7fr);gap:24px}.seo-calc-fields{max-width:none}.seo-calc label{color:#475569;font-size:14px}.seo-calc input{font-size:16px}.seo-calc output{border-radius:22px;min-height:200px}.seo-calc input[aria-invalid=true]{outline-offset:2px;outline:2px solid #b42342}.seo-catalog-empty{flex-direction:column;align-items:center;gap:24px;padding:32px;display:flex}.seo-audio-card{border-radius:22px;padding:20px}.seo-audio-card audio{width:100%;margin-bottom:0}.seo-audio-group>summary{min-height:44px}.seo-page input:focus-visible{outline:2px solid var(--seo-accent);outline-offset:3px}@media (max-width:767px){.seo-intro,.seo-reading{padding:22px 20px}.seo-intro h1{max-width:none;font-size:28px}.seo-hero-grid h1{font-size:24px}.seo-card-link{padding:10px}.seo-calc{grid-template-columns:1fr;gap:20px}.seo-calc output{min-height:180px}.seo-catalog-empty{padding:24px 20px}}
.seo-page{--seo-column-gap:28px;--seo-section-gap:32px;max-width:1248px}.seo-content-layout{gap:var(--seo-column-gap);margin-top:var(--seo-section-gap);grid-template-columns:minmax(0,1fr) 340px;align-items:start;display:grid}.seo-content-main{gap:var(--seo-section-gap);flex-direction:column;grid-area:1/1;min-width:0;display:flex}.seo-content-single{grid-template-columns:minmax(0,1fr)}.seo-content-rail{grid-area:1/2;min-width:0;position:sticky;top:112px}.seo-content-main>.seo-section,.seo-content-main>.seo-number-strip{margin-top:0}.seo-page .seo-section>h2{margin-bottom:16px}.seo-page .seo-practice>h2{letter-spacing:-.015em;font-size:24px;font-weight:700;line-height:1.35}.seo-page .seo-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));align-items:stretch;gap:20px}.seo-page .seo-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.seo-page .seo-channel-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}.seo-channel-card:only-child{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:4px 24px;display:grid}.seo-channel-card:only-child>p{grid-column:1;margin:0}.seo-channel-card:only-child>nav{flex-wrap:wrap;grid-area:1/2/3;gap:16px;margin:0;display:flex}.seo-channel-card:only-child>nav .seo-topic-link{border-bottom:0}.seo-page .seo-reading{padding:28px}.seo-page .seo-reading .seo-prose{max-width:none;margin:0}.seo-page .seo-prose h2,.seo-page .seo-prose h3,.seo-page .seo-prose h4{scroll-margin-top:128px}.seo-content-main .seo-prose>:first-child{margin-top:0}.seo-content-main .seo-section>p:not([class]){color:#64748b;max-width:70ch;margin-bottom:20px;font-size:15px;line-height:1.65}.seo-contents{border-radius:24px;padding:20px}.seo-contents-title,.seo-contents-toggle{color:#334155;align-items:center;gap:10px;font-size:15px;font-weight:600;line-height:1.5;display:flex}.seo-contents-title svg,.seo-contents-toggle svg{color:var(--seo-accent);flex-shrink:0}.seo-contents-toggle{display:none}.seo-contents-links{overscroll-behavior:contain;scrollbar-width:thin;gap:2px;max-height:calc(100dvh - 224px);margin-top:14px;display:grid;overflow-y:auto}.seo-contents-links a{color:#475569;overflow-wrap:anywhere;align-items:center;min-height:44px;padding:10px 0;font-size:14px;font-weight:500;line-height:1.45;display:flex}.seo-contents-links a.seo-contents-detail{color:#64748b;border-left:1px solid #64748b2e;padding-left:12px;font-weight:400}.seo-contents-links a:hover{color:var(--seo-accent)}.seo-links-section{border-radius:28px;padding:24px}.seo-page .seo-related-links{gap:8px}.seo-page .seo-related-links a{border-radius:16px;min-height:48px;padding:12px 14px;font-size:14px}.seo-page .seo-related-links .seo-hub-link{border-radius:24px;min-height:72px;padding:20px 24px;font-size:18px;font-weight:600}.seo-next-step{border-radius:28px;justify-content:space-between;align-items:center;gap:20px;padding:24px;display:flex}.seo-next-step>div:first-child{min-width:0}.seo-page .seo-next-step h2{margin:0 0 8px;font-size:20px}.seo-page .seo-next-step>h2{margin:0}.seo-next-step p{color:#64748b;max-width:50ch;font-size:14px;line-height:1.6}.seo-next-step>a{flex-shrink:0}.seo-next-step .seo-actions{flex-shrink:0;justify-content:flex-end;margin:0}.seo-page #videos .seo-grid{grid-template-columns:minmax(0,1fr);gap:12px}.seo-page #videos .seo-card{grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:8px 24px;display:grid}.seo-page #videos .seo-card p{grid-column:1;margin:0}.seo-page #videos .seo-actions{flex-direction:column;grid-area:1/2/3;align-items:start;gap:4px;margin:0;display:flex}.seo-page #videos .seo-actions a{font-size:14px}.seo-examples{border-radius:26px;padding:24px}.seo-examples>summary{cursor:pointer;color:#334155;align-items:center;gap:12px;font-size:18px;font-weight:700;list-style:none;display:flex}.seo-examples>summary::-webkit-details-marker{display:none}.seo-examples>summary>svg{color:var(--seo-accent);flex-shrink:0}.seo-examples>summary>.seo-meta{flex-shrink:0;margin-left:auto}.seo-examples[open]>summary>svg{transform:rotate(180deg)}.seo-examples>summary::marker{color:var(--seo-accent)}.seo-examples>summary:focus-visible{outline:2px solid var(--seo-accent);outline-offset:5px}.seo-examples[open]>summary{margin-bottom:20px}.seo-number-videos{grid-template-columns:minmax(0,1fr);gap:16px;display:grid}.seo-number-subtopics{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.seo-card .seo-number-subtopics a{color:#334155;text-align:left;border-radius:20px;justify-content:space-between;align-items:center;gap:16px;padding:16px 18px;font-size:16px;font-weight:500;line-height:1.5;text-decoration:none;display:flex}.seo-number-subtopics small{color:#64748b;margin-top:4px;font-size:13px;font-weight:400;display:block}.seo-number-subtopics svg{color:var(--seo-accent);flex-shrink:0}.seo-card .seo-number-subtopics a:hover{color:var(--seo-accent)}.seo-number-examples{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch;gap:20px;display:grid}.seo-examples-footer{border-top:1px solid #64748b21;justify-content:center;margin-top:24px;padding-top:24px;display:flex}@media (max-width:700px){.seo-number-examples,.seo-number-subtopics{grid-template-columns:minmax(0,1fr)}.seo-examples-footer>a{white-space:normal;text-align:center;width:100%}}.seo-intro .seo-actions:last-child{margin-bottom:0}.seo-page .seo-intro .seo-actions>a{min-height:52px;padding:13px 28px;font-size:16px;font-weight:600;line-height:1.5}.seo-editorial-intro{grid-template-columns:minmax(0,1fr) auto;column-gap:32px;display:grid}.seo-editorial-intro>:not([aria-hidden=true]):not(.seo-actions){grid-column:1}.seo-editorial-intro>.seo-actions{flex-direction:column;grid-area:1/2/span 4;align-self:center;align-items:stretch;max-width:320px;margin:0}.seo-editorial-intro:has(>.seo-actions>:only-child){display:block}.seo-editorial-intro:has(>.seo-actions>:only-child)>.seo-actions{flex-direction:row;justify-content:flex-start;align-items:center;max-width:none;margin-top:24px}.seo-page .seo-directory>.seo-grid{margin-top:24px}.seo-page .seo-catalog-heading h1{max-width:32ch}.seo-catalog-heading .seo-catalog-tools{margin:20px 0 0}.seo-catalog-heading .seo-search{max-width:640px}.seo-page .seo-hero-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px}.seo-page .seo-hero-grid h1{font-size:clamp(26px,2.4vw,32px)}.seo-teacher-intro{grid-template-columns:minmax(0,1fr) 300px;column-gap:32px;min-height:224px;margin-top:56px;display:grid}.seo-teacher-copy{grid-column:1;align-self:center;min-width:0}.seo-teacher-copy>.seo-actions{margin:20px 0 0}.seo-teacher-portrait{pointer-events:none;grid-area:1/2;align-self:stretch;min-height:168px;position:relative}.seo-teacher-portrait img{object-fit:contain;object-position:bottom;filter:drop-shadow(0 18px 30px #0f172a2e);width:100%;height:calc(100% + 120px);position:absolute;bottom:-28px;right:0}@media (max-width:1099px){.seo-editorial-intro{display:block}.seo-editorial-intro>.seo-actions{flex-direction:row;max-width:none;margin-top:20px}.seo-content-layout{grid-template-columns:minmax(0,1fr);gap:20px}.seo-content-rail,.seo-content-main{grid-area:auto/1;position:static}.seo-contents{padding:8px 20px}.seo-contents-title{display:none}.seo-contents-toggle{cursor:pointer;text-align:left;width:100%;min-height:48px;display:flex}.seo-contents-toggle svg:last-child{margin-left:auto;transition:transform .16s}.seo-contents-toggle[aria-expanded=true] svg:last-child{transform:rotate(180deg)}.seo-contents-links{max-height:360px;margin:4px 0 12px;display:none}.seo-contents-links.is-open{display:grid}}@media (max-width:767px){.seo-channel-card:only-child{display:block}.seo-channel-card:only-child>nav{margin-top:16px}.seo-teacher-intro{grid-template-columns:minmax(0,1fr);min-height:0;margin-top:40px}.seo-teacher-portrait{grid-area:1/1;justify-self:center;width:min(100%,220px);height:140px;min-height:0;margin-bottom:8px}.seo-teacher-portrait img{filter:none;height:210px;bottom:0;-webkit-mask-image:linear-gradient(#000 82%,#0000);mask-image:linear-gradient(#000 82%,#0000)}.seo-page .seo-intro .seo-actions>a{padding-inline:20px}.seo-page{--seo-section-gap:24px}.seo-page .seo-grid,.seo-page .seo-grid.two,.seo-page .seo-hero-grid{grid-template-columns:minmax(0,1fr)}.seo-page .seo-intro .seo-lead{font-size:15px}.seo-page .seo-reading,.seo-links-section,.seo-next-step{border-radius:24px;padding:20px}.seo-page .seo-hero-grid h1{font-size:26px}.seo-page #videos .seo-card{display:block}.seo-page #videos .seo-card p{margin-top:8px}.seo-page #videos .seo-actions{flex-direction:row;gap:8px 20px;margin-top:12px}.seo-next-step{flex-direction:column;align-items:start;gap:16px}.seo-next-step .seo-actions{justify-content:flex-start}.seo-page .seo-related-links{grid-template-columns:minmax(0,1fr)}}@media (prefers-reduced-motion:reduce){.seo-contents-toggle svg:last-child{transition:none}}@media print{.seo-content-layout{display:block}.seo-content-rail,.seo-next-step{display:none}}
.seo-page .seo-reading.seo-editorial{padding:0}.seo-editorial>div{flex-direction:column;gap:24px;min-width:0;display:flex}.seo-page .seo-editorial .seo-prose{min-width:0;font-size:15px;line-height:1.7}.seo-reading-part{border-radius:28px;min-width:0;padding:26px}.seo-editorial .seo-reading-part>:first-child{margin-top:0}.seo-editorial .seo-reading-part>:last-child{margin-bottom:0}.seo-page .seo-editorial .seo-reading-part>h2{letter-spacing:-.02em;text-wrap:balance;margin:0 0 20px;font-size:23px;line-height:1.35}.seo-page .seo-editorial h3{margin-bottom:14px;font-size:19px;line-height:1.4}.seo-editorial .seo-reading-note{border-left:3px solid rgb(var(--subject-rgb) / .65);border-radius:18px;margin:20px 0;padding:16px 18px}.seo-editorial .seo-reading-note>p{margin:0}.seo-editorial .seo-reading-steps{counter-reset:reading-step;padding-left:0;list-style:none}.seo-editorial .seo-reading-steps>li{counter-increment:reading-step;border-bottom:1px solid #64748b21;margin:0;padding:14px 0 14px 42px;position:relative}.seo-editorial .seo-reading-steps>li:last-child{border-bottom:0}.seo-editorial .seo-reading-steps>li:before{content:counter(reading-step);background:rgb(var(--subject-rgb) / .13);width:28px;height:28px;color:var(--seo-accent);border-radius:50%;place-items:center;font-size:14px;font-weight:700;display:grid;position:absolute;top:13px;left:0}.seo-reading-part[data-kind=mistakes] .seo-reading-steps>li{padding-top:16px;padding-bottom:16px}.seo-editorial .seo-reading-points{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:0;list-style:none;display:grid}.seo-editorial .seo-reading-points>li{background:#ffffff52;border:1px solid #ffffffa6;border-radius:18px;margin:0;padding:14px 16px}.seo-editorial .seo-reading-points>li:only-child{grid-column:1/-1}.seo-editorial .seo-reading-points>li>p:first-child{margin-top:0}.seo-editorial .seo-reading-points>li>p:last-child{margin-bottom:0}.seo-editorial .seo-reading-bullets{padding-left:20px}.seo-editorial .seo-reading-bullets>li{margin-block:12px;padding-left:4px}.seo-reference-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0;display:grid}.seo-reference-item{border-radius:20px;min-width:0;padding:18px}.seo-page .seo-editorial .seo-reference-item>h4{color:#334155;margin:0 0 14px;font-size:18px;font-weight:650;line-height:1.45}.seo-reference-item dl{flex-direction:column;gap:12px;margin:0;display:flex}.seo-reference-item dt{color:#64748b;margin-bottom:3px;font-size:13px;font-weight:600}.seo-reference-item dd{margin:0;font-size:15px;line-height:1.65}.seo-data-scroll{scrollbar-width:thin;overscroll-behavior-x:contain;border-radius:18px;margin:20px 0;overflow-x:auto}.seo-data-scroll:focus-visible{outline:2px solid var(--subject-primary);outline-offset:4px}.seo-editorial .seo-data-scroll table{min-width:100%;margin:0;display:table}.seo-data-scroll th{white-space:normal}.seo-reading-part[data-kind=reference] .seo-reference-grid{gap:10px}.seo-editorial blockquote{background:0 0;border-radius:0;margin:22px 0}.seo-editorial blockquote p{margin:0}.seo-editorial .katex-display{max-width:100%}@media (max-width:767px){.seo-reading-part{padding:22px}.seo-reference-grid,.seo-editorial .seo-reading-points{grid-template-columns:minmax(0,1fr)}.seo-page .seo-editorial .seo-reading-part>h2{font-size:22px}}@media (max-width:479px){.seo-reading-part{border-radius:24px;padding:20px 16px}.seo-editorial>div{gap:20px}.seo-reference-item{padding:16px}.seo-reference-item dt{font-size:13px}.seo-editorial .seo-reading-steps>li{padding-left:38px}}