@import url("https://fonts.googleapis.com/css2?family=Barlow+Semi+Condensed:wght@500;600;700&family=IBM+Plex+Mono:wght@500;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap");
/* Knowledge Center: gas-neutral hub, topic pages and editorial guides */
.kc-page{background:#f3f4f4}
.kc-hero{position:relative;min-height:560px;color:#fff;background:#24282a;overflow:hidden}
.kc-hero::before{position:absolute;inset:0;background:linear-gradient(90deg,rgba(27,30,32,.98) 0%,rgba(27,30,32,.9) 42%,rgba(27,30,32,.34) 72%,rgba(27,30,32,.2) 100%);content:"";z-index:1}
.kc-hero__media{position:absolute;inset:0 0 0 43%}.kc-hero__media img{width:100%;height:100%;object-fit:cover;object-position:center}
.kc-hero__inner{position:relative;z-index:2;display:flex;min-height:560px;align-items:center}.kc-hero__copy{max-width:720px;padding:76px 0}
.kc-kicker{display:flex;align-items:center;gap:12px;margin:0 0 24px;color:#e8a4a6;font:600 13px/1.2 var(--utility);letter-spacing:.1em;text-transform:uppercase}.kc-kicker::before{width:24px;height:1px;background:#db2528;content:""}
.kc-hero h1,.kc-article-hero h1{margin:0;color:#fff;font:600 clamp(48px,6.3vw,82px)/.95 var(--display);letter-spacing:-.05em;text-transform:uppercase}.kc-hero h1 em,.kc-article-hero h1 em{display:block;color:#e29295;font-style:normal}
.kc-hero__lead{max-width:680px;margin:28px 0 0;color:#d7dadd;font-size:19px;line-height:1.7}
.kc-hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.kc-local-nav{position:sticky;z-index:60;top:84px;color:#d7dbdd;background:#2d3133;border-bottom:1px solid rgba(255,255,255,.12)}
.kc-local-nav__inner{display:flex;align-items:center;gap:2px;overflow-x:auto}.kc-local-nav a{flex:none;padding:17px 16px;border-bottom:3px solid transparent;font:600 13px/1 var(--utility);letter-spacing:.04em;text-transform:uppercase}.kc-local-nav a:hover,.kc-local-nav a[aria-current="page"]{color:#fff;background:#363a3d;border-bottom-color:#db2528}
.kc-section{padding:78px 0}.kc-section--white{background:#fff}.kc-section--dark{color:#d5d8da;background:#282c2e}.kc-section--red{color:#fff;background:#8f3538}
.kc-section-heading{display:grid;grid-template-columns:1.15fr .85fr;align-items:end;gap:70px;margin-bottom:38px}.kc-section-heading h2{margin:0;color:var(--navy);font:600 clamp(38px,4.6vw,58px)/1 var(--display);letter-spacing:-.045em}.kc-section-heading h2 em{color:#963a3d;font-style:normal}.kc-section-heading>p{max-width:520px;margin:0;font-size:19px}.kc-section--dark .kc-section-heading h2,.kc-section--red .kc-section-heading h2{color:#fff}.kc-section--dark .kc-section-heading>p{color:#bdc2c4}
.kc-question-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#cfd2d3;border:1px solid #cfd2d3}.kc-question-card{position:relative;display:flex;min-height:190px;flex-direction:column;padding:28px;color:var(--navy);background:#fff;transition:.22s ease}.kc-question-card span{color:#963a3d;font:600 13px/1 var(--utility);letter-spacing:.08em}.kc-question-card strong{margin-top:42px;font:600 24px/1.15 var(--display)}.kc-question-card i{margin-top:auto;color:#963a3d;font-style:normal;font-size:22px}.kc-question-card:hover,.kc-question-card:focus-visible{z-index:1;transform:translateY(-4px);box-shadow:0 18px 40px rgba(28,31,33,.14)}
.kc-category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.kc-category-card{display:flex;min-height:310px;flex-direction:column;padding:30px;background:#fff;border:1px solid #d7d9da;transition:.22s ease}.kc-category-card:nth-child(2),.kc-category-card:nth-child(6){background:#f8eeee}.kc-category-card>span,.kc-feature-card>span,.kc-topic-card>span{color:#963a3d;font:600 13px/1.2 var(--utility);letter-spacing:.08em;text-transform:uppercase}.kc-category-card h3{margin:52px 0 14px;color:var(--navy);font:600 29px/1.05 var(--display);letter-spacing:-.035em}.kc-category-card p{min-height:5.1em;font-size:17px}.kc-category-card ul{padding:0;margin:17px 0 0;list-style:none}.kc-category-card li{padding:7px 0;border-top:1px solid #dcddde;font-size:15px}.kc-category-card b{margin-top:auto;padding-top:18px;color:var(--navy);border-top:1px solid #d7d9da;font:600 14px/1.4 var(--utility);letter-spacing:.04em;text-transform:uppercase}.kc-category-card:hover{transform:translateY(-4px);border-color:#963a3d;box-shadow:0 16px 35px rgba(28,31,33,.1)}
.kc-topic-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}.kc-topic-card{position:relative;display:flex;min-height:430px;flex-direction:column;padding:36px;color:#fff;background:#282c2e;overflow:hidden}.kc-topic-card--co2{background:#963a3d}.kc-topic-card::after{position:absolute;right:-80px;bottom:-130px;width:360px;height:360px;border:1px solid rgba(255,255,255,.13);border-radius:50%;box-shadow:0 0 0 58px rgba(255,255,255,.025),0 0 0 116px rgba(255,255,255,.018);content:""}.kc-topic-card>span{color:#f2b6b8}.kc-topic-card h2,.kc-topic-card h3{position:relative;z-index:1;margin:95px 0 15px;font:600 clamp(44px,5vw,65px)/.95 var(--display);letter-spacing:-.05em;text-transform:uppercase}.kc-topic-card p{position:relative;z-index:1;max-width:560px;color:#e3e5e6;font-size:19px}.kc-topic-card b{position:relative;z-index:1;margin-top:auto;font:600 14px/1 var(--utility);letter-spacing:.05em;text-transform:uppercase}
.kc-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.kc-feature-card{display:flex;min-height:360px;flex-direction:column;background:#fff;border:1px solid #d8dadb;overflow:hidden}.kc-feature-card img{width:100%;height:175px;object-fit:cover}.kc-feature-card__copy{display:flex;flex:1;flex-direction:column;padding:24px}.kc-feature-card h3{margin:22px 0 12px;color:var(--navy);font:600 25px/1.08 var(--display)}.kc-feature-card p{font-size:17px}.kc-feature-card b{margin-top:auto;color:#963a3d;font:600 14px/1.4 var(--utility);text-transform:uppercase}
.kc-split-cta{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(255,255,255,.22)}.kc-split-cta article{padding:38px;background:#8f3538}.kc-split-cta h3{margin:0 0 12px;color:#fff;font:600 34px/1 var(--display)}.kc-split-cta p{color:#f1dfe0;font-size:18px}.kc-split-cta a{display:inline-flex;margin-top:14px;font:600 14px/1 var(--utility);text-transform:uppercase}

/* Topic and category indexes */
.kc-index-hero{padding:76px 0 68px;color:#fff;background:linear-gradient(120deg,#25292b,#3c4143)}.kc-index-hero h1{max-width:900px;margin:0;color:#fff;font:600 clamp(48px,6vw,76px)/.96 var(--display);letter-spacing:-.05em;text-transform:uppercase}.kc-index-hero h1 em{color:#e18a8d;font-style:normal}.kc-index-hero>div>p:last-child{max-width:760px;margin:24px 0 0;color:#d1d5d6;font-size:19px}.kc-breadcrumb{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:30px;color:#bcc1c3;font:600 13px/1.3 var(--utility);letter-spacing:.06em;text-transform:uppercase}.kc-breadcrumb a:hover{color:#fff}
.kc-index-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:52px}.kc-index-aside{position:sticky;top:155px;align-self:start}.kc-index-aside b{display:block;margin-bottom:14px;color:#963a3d;font:600 13px/1 var(--utility);letter-spacing:.08em;text-transform:uppercase}.kc-index-aside a{display:block;padding:12px 0;border-top:1px solid #d3d5d6;font-size:17px}.kc-index-aside a:hover{color:#963a3d}.kc-index-list{display:grid;gap:14px}.kc-index-card{display:grid;grid-template-columns:155px 1fr auto;align-items:center;gap:28px;min-height:150px;padding:26px;background:#fff;border:1px solid #d7d9da}.kc-index-card>span{color:#963a3d;font:600 13px/1.3 var(--utility);text-transform:uppercase}.kc-index-card__meta time{display:block;margin-top:9px;color:#6e7375;font-size:12px;letter-spacing:.02em}.kc-index-card h2,.kc-index-card h3{margin:0 0 8px;color:var(--navy);font:600 27px/1.1 var(--display)}.kc-index-card p{margin:0;font-size:17px}.kc-index-card>b{color:#963a3d;font-size:22px}
.kc-form-grid,.kc-application-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.kc-form-card,.kc-application-card{padding:28px;background:#fff;border:1px solid #d7d9da}.kc-form-card h2,.kc-form-card h3,.kc-application-card h2,.kc-application-card h3{margin:45px 0 12px;color:var(--navy);font:600 28px/1.05 var(--display)}.kc-form-card p,.kc-application-card p{font-size:17px}.kc-form-card a,.kc-application-card a{display:inline-flex;margin-top:14px;color:#963a3d;font:600 14px/1.3 var(--utility);text-transform:uppercase}

/* Article system */
.kc-progress{position:fixed;z-index:150;top:0;right:0;left:0;height:4px;background:transparent}.kc-progress__bar{display:block;width:0;height:100%;background:#db2528;transition:width .08s linear}
.kc-article-hero{position:relative;padding:76px 0 70px;color:#fff;background:#272b2d;overflow:hidden}.kc-article-hero::after{position:absolute;inset:0 0 0 62%;background:linear-gradient(90deg,#272b2d,transparent),var(--kc-article-image,none) center/cover;opacity:.58;content:""}.kc-article-hero .container{position:relative;z-index:1}.kc-article-hero h1{max-width:980px;font-size:clamp(45px,5.5vw,72px)}.kc-article-hero__lead{max-width:760px;margin:24px 0 0;color:#d4d7d9;font-size:19px}.kc-article-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}.kc-article-meta span,.kc-article-meta time{padding:8px 11px;color:#f0c2c4;border:1px solid rgba(255,255,255,.2);font:600 13px/1 var(--utility);text-transform:uppercase}.knowledge-update-date{display:inline-flex;margin-top:22px;padding:8px 11px;color:#963a3d;border:1px solid #c9cccd;font:600 13px/1 var(--utility);letter-spacing:.04em;text-transform:uppercase}
.kc-article{padding:58px 0 88px}.kc-article-layout{display:grid;grid-template-columns:250px minmax(0,820px);justify-content:center;gap:58px}.kc-toc{position:sticky;top:155px;align-self:start}.kc-toc>strong{display:block;margin-bottom:12px;color:#963a3d;font:600 13px/1 var(--utility);letter-spacing:.08em;text-transform:uppercase}.kc-toc a{display:block;padding:9px 0;color:#6f7476;border-left:2px solid #d5d7d8;padding-left:14px;font-size:15px;line-height:1.3}.kc-toc a.is-active,.kc-toc a:hover{color:#963a3d;border-left-color:#963a3d}
.kc-prose{color:#555a5c}.kc-prose section{scroll-margin-top:150px;margin-bottom:48px}.kc-prose h2{margin:0 0 18px;color:var(--navy);font:600 38px/1.04 var(--display);letter-spacing:-.035em}.kc-prose h3{margin:26px 0 11px;color:var(--navy);font:600 25px/1.08 var(--display)}.kc-prose p,.kc-prose li{font-size:19px;line-height:1.72}.kc-prose ul,.kc-prose ol{padding-left:24px}.kc-direct{padding:28px 30px;color:#fff;background:#313638;border-left:5px solid #db2528}.kc-direct strong{display:block;margin-bottom:12px;color:#f2a9ab;font:600 13px/1 var(--utility);letter-spacing:.08em;text-transform:uppercase}.kc-direct p{margin:0;color:#fff;font-size:21px;line-height:1.55}
.kc-option-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.kc-option-grid article{padding:24px;background:#fff;border:1px solid #d7d9da}.kc-option-grid span{color:#963a3d;font:600 13px/1 var(--utility)}.kc-option-grid h3{margin-top:34px}.kc-option-grid p{font-size:17px}
.kc-checklist{padding:0;margin:0;list-style:none}.kc-checklist li{position:relative;padding:15px 15px 15px 44px;background:#fff;border-top:1px solid #d4d6d7}.kc-checklist li::before{position:absolute;top:18px;left:16px;color:#963a3d;content:"\2713";font-weight:700}.kc-caution{padding:24px 26px;background:#f8eeee;border-left:4px solid #963a3d}.kc-caution strong{color:#963a3d}.kc-caution p{margin:8px 0 0;font-size:17px}
.kc-compliance-note{margin-top:22px}
.kc-faq{border-top:1px solid #cfd2d3}.kc-faq details{border-bottom:1px solid #cfd2d3}.kc-faq summary{display:grid;grid-template-columns:1fr 22px;gap:18px;align-items:center;padding:20px 0;color:var(--navy);cursor:pointer;font:600 21px/1.25 var(--display);list-style:none}.kc-faq summary::-webkit-details-marker{display:none}.kc-faq summary::after{content:"+";color:#963a3d;font-size:24px}.kc-faq details[open] summary::after{content:"\2212"}.kc-faq__answer{padding:0 38px 22px 0}.kc-faq__answer p{margin:0;font-size:17px}
.kc-related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.kc-related-card{display:flex;min-height:190px;flex-direction:column;padding:24px;color:var(--navy);background:#fff;border:1px solid #d7d9da}.kc-related-card span{color:#963a3d;font:600 13px/1 var(--utility);text-transform:uppercase}.kc-related-card strong{margin:32px 0 12px;font:600 23px/1.1 var(--display)}.kc-related-card b{margin-top:auto;color:#963a3d;font:600 14px/1 var(--utility);text-transform:uppercase}
.kc-map-figure{margin:28px 0 32px;background:#252a2d;border:1px solid #3b4144}.kc-map-figure img{display:block;width:100%;height:auto}.kc-map-figure figcaption{padding:13px 16px;color:#c9cdcf;font-size:14px;line-height:1.5}.kc-table-wrap{max-width:100%;margin:28px 0 24px;overflow-x:auto;border:1px solid #d4d6d7;background:#fff}.kc-data-table{width:100%;min-width:760px;border-collapse:collapse;color:#555a5c;font-size:16px;line-height:1.55}.kc-data-table--wide{min-width:980px}.kc-data-table th{padding:15px 16px;color:#fff;background:#313638;text-align:left;font:600 13px/1.3 var(--utility);letter-spacing:.04em;text-transform:uppercase}.kc-data-table td{padding:16px;vertical-align:top;border-top:1px solid #d9dbdc}.kc-data-table td:first-child{width:24%;color:var(--navy);font-weight:700}.kc-data-table td:nth-child(2){width:20%}.kc-source-list{padding-left:24px}.kc-source-list li{margin-bottom:9px;font-size:16px;line-height:1.55}.kc-prose a{color:#963a3d;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}.kc-related-card,.kc-article-cta .button{text-decoration:none}
.kc-article-cta{padding:38px;color:#fff;background:#963a3d}.kc-article-cta h2{color:#fff}.kc-article-cta p{color:#f1dfe0}.kc-article-cta .button{margin-top:10px}
[data-knowledge-reveal]{opacity:1;transform:none}.has-js [data-knowledge-reveal]{opacity:0;transform:translateY(18px);transition:opacity .42s ease,transform .42s ease}.has-js [data-knowledge-reveal].is-visible{opacity:1;transform:none}

@media (max-width:1050px){.kc-question-grid{grid-template-columns:1fr 1fr}.kc-category-grid,.kc-feature-grid{grid-template-columns:1fr 1fr}.kc-index-layout,.kc-article-layout{grid-template-columns:1fr}.kc-index-aside,.kc-toc{position:static}.kc-toc,.kc-prose{min-width:0}.kc-toc{display:flex;gap:0;overflow-x:auto;padding-bottom:10px}.kc-toc>strong{display:none}.kc-toc a{flex:none;border-left:0;border-bottom:2px solid #d5d7d8}.kc-toc a.is-active{border-bottom-color:#963a3d}.kc-form-grid,.kc-application-grid{grid-template-columns:1fr 1fr}.kc-index-card{grid-template-columns:120px 1fr auto}}
@media (max-width:720px){.kc-hero,.kc-hero__inner{min-height:650px}.kc-hero__media{inset:0;opacity:.34}.kc-hero::before{background:linear-gradient(0deg,rgba(27,30,32,.98),rgba(27,30,32,.72))}.kc-hero__copy{padding:62px 0}.kc-hero h1{font-size:48px}.kc-local-nav{top:74px}.kc-section{padding:58px 0}.kc-section-heading{grid-template-columns:1fr;gap:18px}.kc-question-grid,.kc-category-grid,.kc-feature-grid,.kc-topic-grid,.kc-form-grid,.kc-application-grid,.kc-related-grid,.kc-option-grid,.kc-split-cta{grid-template-columns:1fr}.kc-question-card{min-height:160px}.kc-category-card{min-height:270px}.kc-topic-card{min-height:350px}.kc-index-card{grid-template-columns:1fr;gap:12px}.kc-index-card>b{display:none}.kc-article-hero{padding:58px 0}.kc-article-hero h1{font-size:43px}.kc-article{padding-top:38px}.kc-prose h2{font-size:32px}.kc-prose p,.kc-prose li{font-size:18px}.kc-direct{padding:24px}.kc-direct p{font-size:19px}}
@media (prefers-reduced-motion:reduce){[data-knowledge-reveal],.has-js [data-knowledge-reveal]{opacity:1!important;transform:none!important;transition:none!important}.kc-question-card,.kc-category-card{transition:none}.kc-progress__bar{transition:none}}