/* =========================================================
   CarbonAI blog: listing (static/blog/index.html) and articles (static/blog/<slug>.html).
   Built on index.css (header, footer, tokens) and solutions.css (.sp-page tokens,
   .sp-btn buttons, .sp-sr). Pages are generated by tools/blog/build-blog.js.
   ========================================================= */
.bl-page { --bl-ink: #1f2d2f; --bl-body: #374151; --bl-muted: #5b6a70; --bl-line: #e3ebec; --bl-pale: #f7fafa; --bl-teal: #397f86; --bl-teal-dark: #2f696f; --bl-ochre: #e7a33c; --bl-coral: #cc5a47; background: #fff; }
.bl-wrap { max-width: 1120px; margin: 0 auto; }

/* ---------- shared bits ---------- */
.bl-eyebrow { margin: 0 0 10px; font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--bl-teal-dark); }
.bl-cat { display: block; font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--bl-teal-dark); }
.bl-meta { display: flex; flex-wrap: wrap; gap: 4px 8px; margin: 0; font-size: 14px; color: var(--bl-muted); }
.bl-card-link { display: block; color: inherit; text-decoration: none; }
.bl-card-link:focus-visible { outline: 2px solid var(--bl-teal); outline-offset: 4px; border-radius: 10px; }

/* ---------- introduction ---------- */
.bl-intro { padding: clamp(36px, 5vw, 60px) 0 clamp(28px, 3.5vw, 40px); background: var(--bl-pale); border-bottom: 1px solid var(--bl-line); }
.bl-intro h1 { margin: 0; font-size: clamp(30px, 3.2vw, 44px); font-weight: 700; line-height: 1.12; letter-spacing: -0.02em; color: var(--bl-ink); }
.bl-intro h1 + p { max-width: 40em; margin: 12px 0 0; font-size: clamp(16px, 1.2vw, 18px); line-height: 1.6; color: var(--bl-body); }

/* ---------- featured: a lead story beside a quieter, numbered list ---------- */
.bl-featured { padding: clamp(32px, 4.5vw, 56px) 0 clamp(28px, 4vw, 48px); }
.bl-featured-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: clamp(28px, 4vw, 56px); align-items: start; }
.bl-lead-media { display: block; overflow: hidden; aspect-ratio: 16 / 9; border-radius: 14px; background: #e6eeef; }
.bl-lead-img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.bl-lead .bl-cat { margin-top: 18px; }
.bl-lead-title { margin: 8px 0 0; font-size: clamp(24px, 2.3vw, 32px); font-weight: 700; line-height: 1.2; letter-spacing: -0.015em; color: var(--bl-ink); text-wrap: balance; }
.bl-lead-sum { max-width: 36em; margin: 10px 0 12px; font-size: 16.5px; line-height: 1.6; color: var(--bl-body); }
.bl-lead .bl-card-link:hover .bl-lead-title, .bl-second-item:hover .bl-second-title, .bl-card-link:hover .bl-card-title { color: var(--bl-teal-dark); text-decoration: underline; text-decoration-thickness: 1.5px; text-underline-offset: 4px; }
.bl-lead .bl-card-link:hover .bl-lead-img, .bl-card-link:hover .bl-card-img, .bl-second-item:hover .bl-second-img { transform: scale(1.025); }
.bl-second { display: grid; margin: 0; padding: 0; list-style: none; border-top: 2px solid var(--bl-ink); }
.bl-second li { border-bottom: 1px solid var(--bl-line); }
.bl-second-item { display: grid; grid-template-columns: 132px minmax(0, 1fr); gap: 18px; align-items: start; padding: 20px 0; }
.bl-second-media { display: block; overflow: hidden; aspect-ratio: 16 / 9; border-radius: 10px; background: #e6eeef; }
.bl-second-img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.bl-second-title { display: block; margin: 6px 0 8px; font-size: 17.5px; font-weight: 600; line-height: 1.3; color: var(--bl-ink); }
.bl-second .bl-meta { font-size: 13px; }

/* ---------- browse: heading, search, category filters ---------- */
.bl-browse { padding: clamp(36px, 4.5vw, 56px) 0 clamp(56px, 7vw, 96px); border-top: 1px solid var(--bl-line); }
.bl-browse-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 16px 32px; }
.bl-browse-head h2, .bl-related h2 { margin: 0; font-size: clamp(24px, 2.2vw, 32px); font-weight: 700; line-height: 1.15; letter-spacing: -0.015em; color: var(--bl-ink); }
.bl-search { flex: 0 1 320px; }
.bl-search-input { width: 100%; min-height: 44px; padding: 10px 14px 10px 40px; border: 1px solid #d6e1e2; border-radius: 8px; background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Ccircle cx='8.5' cy='8.5' r='5.5' fill='none' stroke='%235b6a70' stroke-width='1.6'/%3E%3Cpath d='m13 13 4 4' stroke='%235b6a70' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat 13px center / 17px; font: inherit; font-size: 15px; color: var(--bl-ink); }
.bl-search-input:focus { outline: none; border-color: var(--bl-teal); box-shadow: 0 0 0 3px rgba(57, 127, 134, 0.18); }
.bl-filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 28px; }
.bl-chip { display: inline-flex; align-items: center; gap: 8px; min-height: 40px; padding: 8px 14px; border: 1px solid var(--bl-line); border-radius: 999px; background: #fff; font: inherit; font-size: 14px; font-weight: 500; color: var(--bl-body); cursor: pointer; transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease; }
.bl-chip:hover { border-color: #b9d3d6; color: var(--bl-ink); }
.bl-chip:focus-visible { outline: 2px solid var(--bl-teal); outline-offset: 2px; }
.bl-chip[aria-pressed="true"] { border-color: var(--bl-teal); background: var(--bl-teal); color: #fff; }
.bl-chip-n { font-size: 12px; font-weight: 600; color: #8a959b; }
.bl-chip[aria-pressed="true"] .bl-chip-n { color: rgba(255, 255, 255, 0.8); }

/* ---------- article grid and cards ---------- */
.bl-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(28px, 3vw, 40px) clamp(20px, 2.4vw, 32px); }
.bl-card[hidden] { display: none; }
.bl-card-media { display: block; overflow: hidden; aspect-ratio: 16 / 9; margin-bottom: 14px; border-radius: 12px; background: #e6eeef; }
.bl-card-img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.bl-card-title { margin: 6px 0 8px; font-size: 19px; font-weight: 600; line-height: 1.3; color: var(--bl-ink); text-wrap: pretty; }
.bl-card-sum { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; margin: 0 0 10px; font-size: 15px; line-height: 1.55; color: var(--bl-body); }
.bl-card .bl-meta { font-size: 13px; }
.bl-grid-news { grid-column: 1 / -1; }
.bl-empty { padding: 32px 0; text-align: center; color: var(--bl-body); }
.bl-empty p { margin: 0 0 16px; }
.bl-more-wrap { display: flex; justify-content: center; margin-top: 36px; }
.bl-more[hidden] { display: none; }

/* ---------- newsletter ---------- */
.bl-news { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 20px clamp(24px, 4vw, 56px); align-items: center; padding: clamp(24px, 3vw, 36px); border-radius: 14px; background: #eef5f5; border: 1px solid #dcebec; }
.bl-news h2 { margin: 0; font-size: clamp(21px, 1.9vw, 26px); font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; color: var(--bl-ink); }
.bl-news-copy p { margin: 8px 0 0; font-size: 15.5px; line-height: 1.55; color: var(--bl-body); }
.bl-news-row { display: flex; gap: 10px; }
.bl-news-input { flex: 1 1 auto; min-width: 0; min-height: 48px; padding: 12px 14px; border: 1px solid #cddcde; border-radius: 6px; background: #fff; font: inherit; font-size: 15.5px; color: var(--bl-ink); }
.bl-news-input:focus { outline: none; border-color: var(--bl-teal); box-shadow: 0 0 0 3px rgba(57, 127, 134, 0.18); }
.bl-news-input[aria-invalid="true"] { border-color: #a33a2c; }
.bl-news-btn { flex: none; }
.bl-news-btn[disabled] { cursor: progress; opacity: 0.8; }
.bl-news-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.bl-news-consent { display: flex; gap: 10px; align-items: flex-start; margin-top: 12px; font-size: 14px; line-height: 1.45; color: var(--bl-body); cursor: pointer; }
.bl-news-consent input { flex: none; width: 18px; height: 18px; margin: 1px 0 0; accent-color: var(--bl-teal); }
.bl-news-note { margin: 8px 0 0; font-size: 13px; line-height: 1.5; color: var(--bl-muted); }
.bl-news-note a { color: var(--bl-teal-dark); text-decoration: underline; text-underline-offset: 2px; }
.bl-news-status { margin: 0; font-size: 14px; line-height: 1.5; }
.bl-news-status:not(:empty) { margin-top: 10px; padding: 10px 12px; border-radius: 8px; background: #fff; border-left: 3px solid var(--bl-teal); color: var(--bl-ink); }
.bl-news-status.is-error { border-left-color: #a33a2c; color: #5e2a22; }
.bl-news-status.is-info { border-left-color: var(--bl-ochre); }

/* ---------- article ---------- */
.bl-article { padding-top: clamp(28px, 4vw, 48px); }
.bl-art-head { max-width: calc(760px + 2 * var(--gutter, 24px)); }
.bl-crumbs ol { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 18px; padding: 0; list-style: none; font-size: 14px; }
.bl-crumbs li + li::before { content: "/"; margin-right: 6px; color: #9aa6ab; }
.bl-crumbs a { color: var(--bl-teal-dark); font-weight: 500; text-decoration: none; }
.bl-crumbs a:hover { text-decoration: underline; text-underline-offset: 3px; }
.bl-art-head h1 { margin: 0; font-size: clamp(30px, 3.4vw, 46px); font-weight: 700; line-height: 1.12; letter-spacing: -0.02em; color: var(--bl-ink); text-wrap: balance; }
.bl-art-sum { margin: 14px 0 0; font-size: clamp(17px, 1.3vw, 19.5px); line-height: 1.55; color: var(--bl-body); }
.bl-art-meta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; margin-top: 22px; padding: 14px 0; border-top: 1px solid var(--bl-line); border-bottom: 1px solid var(--bl-line); }
/* author byline: small round photo, name, and title (photo from the About page) */
.bl-byline { display: flex; flex-basis: 100%; align-items: center; gap: 16px; }
.bl-byline-img { flex: none; width: 56px; height: 56px; border-radius: 50%; object-fit: cover; background: #e6eeef; }
.bl-byline p { margin: 0; }
.bl-byline-name { font-size: 17px; font-weight: 500; line-height: 1.3; color: var(--bl-ink); }
.bl-byline-title { margin-top: 2px; font-size: 15px; line-height: 1.35; color: var(--bl-teal-dark); }
.bl-share { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.bl-share-label { font-size: 13px; font-weight: 600; color: var(--bl-muted); }
.bl-share-btn { display: inline-flex; align-items: center; min-height: 36px; padding: 6px 14px; border: 1px solid var(--bl-line); border-radius: 6px; background: #fff; font: inherit; font-size: 14px; font-weight: 500; color: var(--bl-teal-dark); text-decoration: none; cursor: pointer; }
.bl-share-btn:hover { border-color: #b9d3d6; background: #f4f9f9; }
.bl-share-btn:focus-visible { outline: 2px solid var(--bl-teal); outline-offset: 2px; }
.bl-share-status { font-size: 13px; color: var(--bl-teal-dark); }
.bl-art-hero { max-width: calc(1040px + 2 * var(--gutter, 24px)); margin: clamp(24px, 3vw, 36px) auto 0; }
.bl-art-img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 14px; }
.bl-art-layout { max-width: calc(760px + 2 * var(--gutter, 24px)); padding-top: clamp(28px, 3.5vw, 44px); }
.bl-art-layout.has-toc { display: grid; grid-template-columns: 200px minmax(0, 760px); gap: clamp(32px, 4vw, 56px); justify-content: center; max-width: calc(1040px + 2 * var(--gutter, 24px)); }
.bl-toc { position: sticky; top: calc(var(--header-h, 54px) + 24px); align-self: start; }
.bl-toc-title { margin: 0 0 10px; font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--bl-teal-dark); }
.bl-toc ol { margin: 0; padding: 0; list-style: none; border-left: 1px solid var(--bl-line); }
.bl-toc a { display: block; margin-left: -1px; padding: 6px 0 6px 12px; border-left: 2px solid transparent; font-size: 14px; line-height: 1.4; color: var(--bl-body); text-decoration: none; }
.bl-toc a:hover { color: var(--bl-teal-dark); border-left-color: #b9d3d6; }
.bl-toc a.is-active { color: var(--bl-teal-dark); font-weight: 500; border-left-color: var(--bl-teal); }

/* ---------- article body ---------- */
.bl-prose { min-width: 0; font-size: 17.5px; line-height: 1.75; color: var(--bl-body); }
.bl-prose > * + * { margin-top: 1.1em; }
.bl-prose > :first-child { margin-top: 0; }
.bl-prose p { margin-bottom: 0; }
.bl-prose h2 { margin: 2.2em 0 0; font-size: clamp(23px, 2vw, 28px); font-weight: 700; line-height: 1.22; letter-spacing: -0.01em; color: var(--bl-ink); scroll-margin-top: calc(var(--header-h, 54px) + 24px); }
.bl-prose h3 { margin: 1.8em 0 0; font-size: 20px; font-weight: 600; line-height: 1.3; color: var(--bl-ink); }
.bl-prose h2 + *, .bl-prose h3 + * { margin-top: 0.6em; }
.bl-prose strong { font-weight: 600; color: var(--bl-ink); }
.bl-prose a { color: var(--bl-teal-dark); font-weight: 500; text-decoration: underline; text-decoration-color: rgba(57, 127, 134, 0.55); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
.bl-prose a:hover { color: var(--bl-teal); text-decoration-color: currentColor; }
.bl-prose a.bl-ext::after { content: " ↗"; font-size: 0.8em; }
.bl-prose ul, .bl-prose ol { padding-left: 0; list-style: none; }
.bl-prose ul > li, .bl-prose ol > li { position: relative; padding-left: 22px; }
.bl-prose ul > li + li, .bl-prose ol > li + li { margin-top: 0.55em; }
.bl-prose ul > li::before { content: ""; position: absolute; left: 4px; top: 0.72em; width: 6px; height: 6px; border-radius: 50%; background: var(--bl-teal); }
.bl-prose ol { counter-reset: bl; }
.bl-prose ol > li { counter-increment: bl; }
.bl-prose ol > li::before { content: counter(bl) "."; position: absolute; left: 0; font-weight: 600; color: var(--bl-teal-dark); }
.bl-prose blockquote { margin-left: 0; margin-right: 0; padding: 6px 0 6px 22px; border-left: 3px solid var(--bl-ochre); }
.bl-prose blockquote p { font-size: 21px; font-weight: 600; line-height: 1.45; color: var(--bl-ink); }
.bl-prose em { color: var(--bl-ink); }
.bl-prose code { padding: 1px 5px; border-radius: 4px; background: #f1f5f5; font-size: 0.9em; }
.bl-table-wrap { overflow-x: auto; border: 1px solid var(--bl-line); border-radius: 12px; }
.bl-table-wrap:focus-visible { outline: 2px solid var(--bl-teal); outline-offset: 2px; }
.bl-prose table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.5; }
.bl-prose th, .bl-prose td { padding: 12px 14px; border-bottom: 1px solid var(--bl-line); text-align: left; vertical-align: top; }
.bl-prose thead th { background: var(--bl-pale); font-size: 12.5px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--bl-muted); white-space: nowrap; }
.bl-prose tbody th { font-weight: 600; color: var(--bl-ink); }
.bl-prose tbody tr:last-child > * { border-bottom: 0; }

/* figures written into posts */
.bl-figure { margin: 2em 0 0; }
.bl-figure figcaption { margin-top: 10px; font-size: 14px; line-height: 1.5; color: var(--bl-muted); }
.bl-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 1.6em; border: 1px solid #dcebec; border-radius: 12px; background: #f4f9f9; }
.bl-stats--four { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 0; }
.bl-stats > div { padding: 16px 14px; text-align: center; }
.bl-stats > div + div { border-left: 1px solid #dcebec; }
.bl-stats b { display: block; font-size: clamp(22px, 2vw, 28px); font-weight: 700; line-height: 1.1; color: var(--bl-teal-dark); }
.bl-stats span { display: block; margin-top: 4px; font-size: 12px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--bl-muted); }
.bl-groups { display: grid; gap: 12px; }
.bl-groups--5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.bl-groups--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.bl-groups--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bl-groups > div { padding: 14px 14px 16px; border: 1px solid var(--bl-line); border-top: 3px solid var(--bl-teal); border-radius: 10px; background: #fff; }
.bl-groups h4 { margin: 0 0 8px; font-size: 14px; font-weight: 700; color: var(--bl-ink); }
.bl-prose .bl-groups ul > li { padding-left: 14px; font-size: 13.5px; line-height: 1.45; }
.bl-prose .bl-groups ul > li + li { margin-top: 5px; }
.bl-prose .bl-groups ul > li::before { left: 0; top: 0.6em; width: 5px; height: 5px; }
.bl-prose .bl-goals { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; padding: 0; }
.bl-prose .bl-goals > li { display: flex; gap: 10px; align-items: baseline; margin: 0; padding: 10px 12px; border: 1px solid var(--bl-line); border-radius: 8px; background: #fbfcfc; font-size: 14px; line-height: 1.35; color: var(--bl-ink); }
.bl-prose .bl-goals > li::before { content: none; }
.bl-goals b { flex: none; min-width: 20px; font-size: 13px; color: var(--bl-teal-dark); }
.bl-claims { display: grid; gap: 14px; }
.bl-claim { padding: 18px 20px; border: 1px solid var(--bl-line); border-left: 3px solid var(--bl-coral); border-radius: 0 12px 12px 0; background: #fff; }
.bl-prose .bl-claim-q { margin: 0; font-size: 17px; font-style: italic; font-weight: 600; line-height: 1.45; color: var(--bl-ink); }
.bl-claim dl { display: grid; grid-template-columns: repeat(3, auto) minmax(0, 1fr); gap: 4px 20px; margin: 14px 0 0; font-size: 14px; line-height: 1.45; }
.bl-claim dt { font-size: 11.5px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--bl-muted); }
.bl-claim dd { margin: 2px 0 0; color: var(--bl-ink); }
.bl-claim dl > div { min-width: 0; }
.bl-claim .bl-high { font-weight: 700; color: #a3402f; }
.bl-prose .bl-claim > p:not(.bl-claim-q) { margin: 10px 0 0; padding-top: 10px; border-top: 1px solid var(--bl-line); font-size: 15px; line-height: 1.55; }
.bl-claim > p b { display: block; margin-bottom: 2px; font-size: 11.5px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--bl-muted); }
.bl-excerpt { padding: 20px 22px; border: 1px solid var(--bl-line); border-radius: 12px; background: #fbfaf7; }
.bl-prose .bl-excerpt-label { margin: 0 0 4px; font-size: 12px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--bl-muted); }
.bl-excerpt h4 { margin: 14px 0 4px; font-size: 13px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: #a3402f; }
.bl-prose .bl-excerpt p { margin: 0; font-size: 15px; line-height: 1.6; }
.bl-excerpt-action { margin-top: 14px; padding: 12px 14px; border-left: 3px solid var(--bl-teal); background: #fff; font-size: 15px; line-height: 1.6; }
.bl-excerpt-action b { display: block; margin-bottom: 2px; font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--bl-teal-dark); }
.bl-prose .bl-cta { margin-top: 2.2em; padding: 18px 20px; border-radius: 12px; background: #eef5f5; font-size: 17px; font-weight: 600; line-height: 1.55; color: var(--bl-ink); }

/* chart: projects by rating band (one series, one hue; values labeled, share below each band) */
/* the chart data table is for screen readers only; keep it out of the layout */
.bl-prose table.sp-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.bl-chart { position: relative; padding: 18px 18px 14px; border: 1px solid var(--bl-line); border-radius: 12px; background: #fff; }
.bl-chart-head b { display: block; font-size: 16px; color: var(--bl-ink); }
.bl-chart-head span { display: block; font-size: 13.5px; line-height: 1.45; color: var(--bl-muted); }
.bl-bars { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 10px; align-items: end; height: 238px; margin-top: 16px; padding-bottom: 46px; position: relative; }
.bl-bars::before { content: ""; position: absolute; left: 0; right: 0; bottom: 46px; height: 1px; background: #cfd8da; }
.bl-bar { position: relative; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; height: 100%; }
.bl-bar-fill { display: block; width: min(100%, 44px); height: var(--h); min-height: 2px; border-radius: 4px 4px 0 0; background: var(--bl-teal); }
.bl-bar-val { margin-bottom: 4px; font-size: 12.5px; font-weight: 600; color: var(--bl-ink); }
.bl-bar-lab { position: absolute; bottom: -46px; padding-top: 8px; display: flex; flex-direction: column; align-items: center; font-size: 13px; font-weight: 600; color: var(--bl-ink); }
.bl-bar-lab small { font-size: 11.5px; font-weight: 400; color: var(--bl-muted); }
.bl-bar:hover .bl-bar-fill { background: var(--bl-teal-dark); }
.bl-bar::after { content: attr(data-tip); position: absolute; bottom: calc(var(--h) + 30px); left: 50%; transform: translateX(-50%); padding: 5px 9px; border-radius: 6px; background: var(--bl-ink); font-size: 12.5px; color: #fff; white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity 0.15s ease; z-index: 2; }
.bl-bar:hover::after { opacity: 1; }
/* edge bars: keep the hover label inside the chart */
.bl-bar:first-child::after, .bl-bar:nth-child(2)::after { left: 0; transform: none; }
.bl-bar:last-child::after, .bl-bar:nth-last-child(2)::after { left: auto; right: 0; transform: none; }
.bl-chart { overflow: hidden; }

/* explore in CarbonAI, closing share, related */
.bl-explore { max-width: calc(760px + 2 * var(--gutter, 24px)); margin-top: clamp(36px, 4vw, 48px); }
.bl-explore h2 { margin: 0 0 12px; font-size: 13px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--bl-muted); }
.bl-explore ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 0; padding: 0; list-style: none; }
.bl-explore a { display: block; height: 100%; padding: 14px 16px; border: 1px solid var(--bl-line); border-radius: 10px; text-decoration: none; transition: border-color 0.15s ease, background-color 0.15s ease; }
.bl-explore a:hover { border-color: #b9d3d6; background: #f7fafa; }
.bl-explore strong { display: block; font-size: 16px; color: var(--bl-teal-dark); }
.bl-explore strong::after { content: " →"; }
.bl-explore span { display: block; margin-top: 2px; font-size: 14px; line-height: 1.45; color: var(--bl-body); }
.bl-art-foot { max-width: calc(760px + 2 * var(--gutter, 24px)); margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--bl-line); }
.bl-art-news { margin-top: clamp(40px, 5vw, 64px); }
.bl-news--compact { grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); }
.bl-related { margin-top: clamp(40px, 5vw, 64px); padding: clamp(36px, 4.5vw, 56px) 0 clamp(56px, 7vw, 88px); background: var(--bl-pale); border-top: 1px solid var(--bl-line); }
.bl-related h2 { margin-bottom: 24px; }
.bl-back { margin: 28px 0 0; }
.bl-back a { font-weight: 500; color: var(--bl-teal-dark); }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .bl-art-layout.has-toc { display: block; max-width: calc(760px + 2 * var(--gutter, 24px)); }
  .bl-toc { display: none; }
  .bl-groups--5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 960px) {
  .bl-featured-grid { grid-template-columns: minmax(0, 1fr); }
  .bl-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bl-news, .bl-news--compact { grid-template-columns: minmax(0, 1fr); }
  .bl-groups--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bl-claim dl { grid-template-columns: repeat(3, auto); }
  .bl-claim dl > div:last-child { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .bl-grid { grid-template-columns: minmax(0, 1fr); }
  .bl-filters { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .bl-filters::-webkit-scrollbar { display: none; }
  .bl-chip { flex: none; }
  .bl-search { flex-basis: 100%; }
  .bl-second-item { grid-template-columns: 96px minmax(0, 1fr); gap: 14px; padding: 16px 0; }
  .bl-second-title { font-size: 16.5px; }
  .bl-news-row { flex-direction: column; }
  .bl-news-btn { width: 100%; }
  .bl-prose { font-size: 17px; }
  .bl-stats, .bl-stats--four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bl-stats > div + div { border-left: 0; }
  .bl-stats > div:nth-child(n + 3) { border-top: 1px solid #dcebec; }
  .bl-stats > div:nth-child(even) { border-left: 1px solid #dcebec; }
  .bl-stats > div:nth-child(3):last-child { grid-column: 1 / -1; }
  .bl-groups--5, .bl-groups--4, .bl-groups--3 { grid-template-columns: minmax(0, 1fr); }
  .bl-prose .bl-goals { grid-template-columns: minmax(0, 1fr); }
  .bl-claim dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bl-explore ul { grid-template-columns: minmax(0, 1fr); }
  .bl-bars { gap: 4px; }
  .bl-bar-val { font-size: 11px; }
  .bl-art-meta { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  .bl-lead-img, .bl-card-img, .bl-second-img, .bl-chip, .bl-bar::after { transition: none; }
  .bl-card-link:hover .bl-card-img, .bl-lead .bl-card-link:hover .bl-lead-img, .bl-second-item:hover .bl-second-img { transform: none; }
}