.breadcrumb { display: flex; flex-wrap: wrap; gap: 10px; padding: 26px 0; color: var(--color-muted); font-size: .8rem; }
.breadcrumb a { color: var(--color-primary); font-weight: 800; }
.article-hero { padding: 58px 0 76px; background: var(--color-soft); }
.article-hero__grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); gap: clamp(44px, 8vw, 118px); align-items: center; }
.article-hero h1 { max-width: 720px; margin-bottom: 20px; font-size: clamp(2.8rem, 5.1vw, 4.9rem); }
.article-hero__copy > p:not(.eyebrow) { max-width: 670px; margin-bottom: 22px; color: var(--color-muted); font-size: 1.1rem; }
.article-meta { display: flex; flex-wrap: wrap; gap: 9px; color: var(--color-muted); font-size: .78rem; font-weight: 700; }
.quick-reference { display: grid; grid-template-columns: 155px 1fr; min-height: 300px; overflow: hidden; border-radius: var(--radius-large); background: var(--color-primary); box-shadow: var(--shadow); }
.quick-reference > img { width: 100%; height: 100%; object-fit: cover; }
.quick-reference > div { padding: 28px; color: #fff; }
.quick-reference .eyebrow { color: #c5dce8; }
.quick-reference h2 { margin-bottom: 17px; font-size: 1.55rem; letter-spacing: -.025em; }
.quick-reference dl { display: grid; margin: 0; }
.quick-reference dl div { display: grid; grid-template-columns: .85fr 1.15fr; gap: 16px; padding: 9px 0; border-top: 1px solid rgba(255, 255, 255, .18); }
.quick-reference dt { color: #c5dce8; font-size: .72rem; font-weight: 700; }
.quick-reference dd { margin: 0; font-size: .78rem; font-weight: 800; }
.article-layout { display: grid; grid-template-columns: 180px minmax(0, 920px); gap: clamp(42px, 7vw, 100px); align-items: start; }
.article-reading { min-width: 0; padding: 90px 0 112px; }
.article-toc { position: sticky; top: 110px; display: grid; gap: 8px; height: fit-content; margin-top: 94px; padding-left: 16px; border-left: 1px solid var(--color-line); font-size: .78rem; }
.article-toc p { margin: 0 0 4px; color: var(--color-primary); font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.article-toc a { color: var(--color-muted); }
.article-toc a:hover { color: var(--color-primary); }
.article-section { padding-bottom: 92px; }
.article-page .section-reveal { opacity: 0; transform: translateY(20px); transition: opacity .65s ease, transform .65s ease; }
.article-page .section-reveal.is-visible { opacity: 1; transform: none; }
.article-section h2, .related-articles h2 { margin-bottom: 20px; font-size: clamp(2.2rem, 4vw, 3.45rem); }
.article-section p { color: var(--color-muted); }
.article-overview { display: grid; grid-template-columns: .87fr 1.13fr; gap: clamp(32px, 6vw, 76px); align-items: center; }
.article-overview figure { height: 370px; margin: 0; overflow: hidden; border-radius: var(--radius-large); box-shadow: var(--shadow); }
.article-overview figure img { height: 100%; object-fit: cover; }
.article-overview ul { display: grid; gap: 9px; margin: 24px 0 0; padding-left: 20px; color: var(--color-text); font-size: .88rem; }
.article-prose { max-width: 790px; margin: 0 auto; }
.article-prose > h2:not(:first-of-type) { margin-top: 66px; }
.article-prose > p, .article-prose li { color: var(--color-muted); font-size: 1rem; }
.article-prose h3 { margin: 34px 0 9px; font-size: 1.22rem; }
.article-prose ol { display: grid; gap: 12px; padding-left: 23px; }
.article-prose li::marker { color: var(--color-primary); font-weight: 800; }
.article-figure { margin: 30px 0; overflow: hidden; border-radius: var(--radius-large); background: #eaf1f4; box-shadow: var(--shadow); }
.article-figure img { width: 100%; max-height: 380px; object-fit: contain; }
.article-figure--wide img { height: 330px; max-height: none; object-fit: cover; }
.article-table { overflow-x: auto; margin: 28px 0 10px; border: 1px solid var(--color-line); border-radius: 14px; }
.article-table table { width: 100%; min-width: 510px; border-collapse: collapse; font-size: .82rem; }
.article-table th, .article-table td { padding: 14px 16px; border-bottom: 1px solid var(--color-line); text-align: left; }
.article-table thead { color: #fff; background: var(--color-primary); }
.article-table tbody th { color: var(--color-text); }
.article-table tbody td { color: var(--color-muted); }
.article-faq { padding: 42px; border-radius: 30px; background: var(--color-soft); }
.article-faq__heading { display: grid; grid-template-columns: 180px 1fr; gap: 30px; align-items: center; }
.article-faq__heading > img { height: 170px; border-radius: var(--radius-medium); object-fit: cover; }
.article-faq__heading p { margin-bottom: 0; }
.faq-list { margin-top: 34px; border-top: 1px solid var(--color-line); }
.faq-list details { border-bottom: 1px solid var(--color-line); }
.faq-list summary { position: relative; padding: 20px 38px 20px 0; color: var(--color-text); cursor: pointer; font-size: .97rem; font-weight: 800; list-style: none; }
.faq-list summary::after { position: absolute; right: 0; content: '+'; color: var(--color-primary); font-size: 1.35rem; font-weight: 400; }
.faq-list details[open] summary::after { content: '−'; }
.faq-list details p { padding-bottom: 19px; margin-bottom: 0; font-size: .9rem; }
.article-summary { display: grid; grid-template-columns: .9fr 1.1fr; overflow: hidden; padding: 0; border-radius: 30px; color: #fff; background: var(--color-primary-dark); }
.article-summary > img { height: 100%; min-height: 360px; object-fit: cover; }
.article-summary > div { padding: clamp(34px, 5vw, 66px); }
.article-summary .eyebrow { color: #d5e6ee; }
.article-summary h2 { margin-bottom: 18px; }
.article-summary p { color: #d5e6ee; }
.article-summary .button { margin-top: 10px; border-color: #fff; color: var(--color-primary); background: #fff; }
.article-inquiry { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(30px, 6vw, 76px); padding: 44px; border-radius: 30px; background: var(--color-soft); }
.article-inquiry > div > img { height: 180px; margin-top: 25px; border-radius: var(--radius-medium); object-fit: cover; }
.article-form { display: grid; gap: 14px; align-content: start; padding: 28px; border-radius: var(--radius-large); background: #fff; box-shadow: var(--shadow); }
.article-form label { display: grid; gap: 6px; font-size: .78rem; font-weight: 800; }
.article-form input, .article-form textarea { width: 100%; padding: 11px 12px; border: 1px solid var(--color-line); border-radius: 10px; color: var(--color-text); resize: vertical; }
.article-form input:focus, .article-form textarea:focus { border-color: var(--color-primary); outline: 3px solid rgba(39, 73, 97, .12); }
.article-footer { display: flex; gap: 15px; align-items: center; padding: 20px 0 34px; border-bottom: 1px solid var(--color-line); }
.article-footer img { width: 68px; height: 68px; border-radius: 50%; object-fit: cover; }
.article-footer p { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; color: var(--color-muted); font-size: .8rem; }
.related-articles { padding-top: 66px; }
.related-articles__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.related-card { display: flex; flex-direction: column; min-height: 350px; overflow: hidden; border-radius: var(--radius-large); background: var(--color-soft); transition: transform .25s ease, box-shadow .25s ease; }
.related-card:hover { box-shadow: var(--shadow); transform: translateY(-5px); }
.related-card img { height: 155px; object-fit: cover; }
.related-card > span, .related-card h3, .related-card p { margin-left: 20px; margin-right: 20px; }
.related-card > span { margin-top: 19px; color: var(--color-primary); font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.related-card h3 { margin-top: 7px; margin-bottom: 9px; font-size: 1.1rem; }
.related-card p { margin-bottom: 20px; color: var(--color-muted); font-size: .8rem; }
@media (max-width: 1040px) { .article-layout { grid-template-columns: 1fr; } .article-toc { display: none; } }
@media (max-width: 800px) { .article-hero__grid, .article-overview, .article-summary, .article-inquiry { grid-template-columns: 1fr; } .article-hero { padding: 48px 0 60px; } .article-overview figure { height: 300px; } .article-summary > img { min-height: 250px; } .article-reading { padding-top: 64px; } }
@media (max-width: 620px) { .breadcrumb { padding: 18px 0; } .article-hero h1 { font-size: clamp(3rem, 14vw, 4.4rem); } .quick-reference { grid-template-columns: 1fr; } .quick-reference > img { height: 165px; } .article-section { padding-bottom: 70px; } .article-faq, .article-inquiry { padding: 22px; border-radius: 22px; } .article-faq__heading { grid-template-columns: 1fr; gap: 22px; } .article-faq__heading > img { height: 210px; } .article-inquiry > div { padding: 18px; } .article-form { padding: 22px; } .related-articles { padding-top: 48px; } .related-articles__grid { grid-template-columns: 1fr; } }

/* Aqualume article content within the existing article template. */
html { scroll-behavior: auto; }
html.js #main-content > .article-page { opacity: 1; transform: none; }
.article-page .article-prose.section-reveal { opacity: 1; transform: none; }
.article-prose > h2,.article-prose > figure { opacity: 0; transform: translateY(16px); transition: opacity .65s ease, transform .65s ease; }
.article-prose > h2.is-visible,.article-prose > figure.is-visible { opacity: 1; transform: none; }
.article-hero__grid { grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: clamp(32px, 5vw, 72px); }
.article-hero h1 { font-size: clamp(2.9rem, 4.6vw, 4.25rem); }
.quick-reference { grid-template-columns: 1fr; background: var(--color-primary); }
.quick-reference > img { height: 160px; object-fit: cover; object-position: center 43%; }
.quick-reference > div { padding: 24px 27px 20px; }
.quick-reference h2 { margin-bottom: 12px; }
.quick-reference__table { overflow-x: auto; }
.quick-reference table { width: 100%; border-collapse: collapse; font-size: .84rem; line-height: 1.4; }
.quick-reference th,.quick-reference td { padding: 8px 8px 8px 0; border-top: 1px solid rgba(255,255,255,.2); vertical-align: top; text-align: left; }
.quick-reference thead th { color: #d5e8f2; font-size: .75rem; }
.quick-reference tbody th { width: 42%; min-width: 118px; color: #d5e8f2; font-weight: 700; }
.quick-reference tbody td { color: #fff; font-weight: 600; }
.quick-reference__note { margin: 13px 0 0; color: #d5e8f2; font-size: .76rem; }
.article-toc { max-height: calc(100vh - 130px); overflow-y: auto; scrollbar-width: thin; }
.article-prose > h2 { scroll-margin-top: 100px; }
.article-prose > h2:not(:first-of-type) { margin-top: 76px; }
.article-prose > h2 + .article-figure { margin-top: 20px; }
.article-prose p,.article-prose li,.article-overview p,.article-overview li,.article-summary p,.article-summary li { font-size: 1rem; line-height: 1.72; }
.article-prose a,.article-footer a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.article-overview figure { display: grid; place-items: center; background: #e9f4f9; }
.article-overview figure img { height: auto; max-height: 100%; object-fit: contain; }
.article-prose ul,.article-faq ul,.article-summary ul { padding-left: 22px; }
.article-prose ul li,.article-faq ul li,.article-summary ul li { margin: 6px 0; }
.article-figure--wide img { height: auto; max-height: 380px; object-fit: contain; background: #e9f4f9; }
.article-table table { min-width: 530px; font-size: .9rem; line-height: 1.5; }
.article-table th,.article-table td { padding: 12px 15px; }
.article-table tbody tr:nth-child(even) { background: #f7fafc; }
.article-table tbody th { min-width: 120px; }
.article-faq h3 { margin: 26px 0 8px; font-size: 1.2rem; }
.article-faq__heading > img { object-fit: cover; }
.article-inquiry > div > img,.related-card img { object-fit: contain; background: #e9f4f9; }
.article-faq ul { margin-bottom: 0; color: var(--color-muted); }
.faq-list details p { line-height: 1.65; }
.article-summary h3 { color: #fff; }
.article-summary ul { color: #e0edf4; }
.article-form .form-note { margin: -2px 0 0; color: var(--color-muted); font-size: .76rem; }
.article-footer { align-items: flex-start; }
.article-footer > div { padding-top: 8px; }
.article-footer p { display: block; margin: 0 0 5px; }
.article-footer__sources { font-size: .76rem; }
.related-card:hover { box-shadow: none; transform: none; }
.related-card { min-height: 0; }
@media (max-width: 800px) { .article-hero__grid { grid-template-columns: 1fr; } .quick-reference > img { height: 210px; } }
@media (max-width: 620px) { .article-hero h1 { font-size: clamp(2.55rem, 10.3vw, 3.55rem); } .quick-reference > img { height: 160px; } .quick-reference > div { padding: 22px 18px; } .quick-reference table { font-size: .79rem; } .article-section h2,.related-articles h2 { font-size: clamp(2rem, 8.4vw, 2.7rem); } .article-table table { min-width: 530px; } .article-overview figure { height: 245px; } .article-inquiry > div { padding: 0; } .article-footer img { width: 64px; height: 64px; } }
@media (prefers-reduced-motion: reduce) { .article-prose > h2,.article-prose > figure { opacity: 1; transform: none; } }

/* The five-column reference uses the article template's scrollable table pattern. */
.article-hero__grid { grid-template-columns: 1fr; gap: 40px; }
.article-hero h1 { max-width: 1020px; font-size: clamp(2.6rem, 5vw, 4.25rem); }
.article-hero__copy > p:not(.eyebrow) { max-width: 920px; }
.quick-reference > img { height: 210px; object-fit: cover; }
.quick-reference > div { min-width: 0; }
.quick-reference__table table { min-width: 790px; }
.quick-reference__table tbody th { width: auto; min-width: 110px; }
.quick-reference__table th,.quick-reference__table td { padding: 11px 12px; }
.quick-reference__note { max-width: 850px; line-height: 1.55; }
.article-overview { grid-template-columns: 1fr; }
.article-overview figure { max-width: 790px; height: auto; aspect-ratio: 16/9; }
.article-prose .article-callout { margin: 25px 0; padding: 18px 22px; border-left: 5px solid var(--color-primary); border-radius: 0 12px 12px 0; background: var(--color-soft); color: var(--color-text); }
.article-summary h2 { font-size: clamp(2rem, 3.1vw, 2.85rem); }
.article-summary li { line-height: 1.6; }
.related-articles__grid { grid-template-columns: minmax(0, 340px); }
.related-card { color: var(--color-text); text-decoration: none; }
.related-card:hover,.related-card:focus-visible { box-shadow: var(--shadow); transform: translateY(-4px); }
.related-card:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 3px; }
@media (max-width: 620px) { .article-hero__grid { gap: 26px; } .quick-reference > img { height: 155px; } .quick-reference__table table { min-width: 790px; } .related-articles__grid { grid-template-columns: 1fr; } }

/* Article-specific Quick Reference content inside the existing template. */
.quick-reference > img { height: 230px; }
.article-overview > div { min-width: 0; }
.article-overview .article-table { max-width: 100%; }
.algae-quick-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px 22px; margin: 0; padding: 0; list-style: none; }
.algae-quick-list li { position: relative; padding: 10px 12px 10px 20px; border-top: 1px solid rgba(255,255,255,.25); color: #fff; font-size: .9rem; line-height: 1.45; }
.algae-quick-list li::before { position: absolute; left: 0; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: #fff; content: ''; }
.quick-reference__note { max-width: none; margin-top: 18px; color: #e9f4f9; }
.related-articles__grid { grid-template-columns: repeat(2, minmax(0, 340px)); }
@media (max-width: 800px) { .algae-quick-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .quick-reference > img { height: 175px; } .algae-quick-list { grid-template-columns: 1fr; } .related-articles__grid { grid-template-columns: 1fr; } }

/* Aquascaping article content within the shared article template. */
.article-hero__grid { grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr); gap: clamp(34px, 5vw, 75px); }
.article-hero h1 { max-width: 760px; font-size: clamp(2.65rem, 4.25vw, 4.2rem); }
.quick-reference > img { height: auto; aspect-ratio: 16/9; object-fit: contain; background: #edf5f7; }
.quick-reference dl { display: grid; margin: 0; }
.quick-reference dl div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 8px 0; border-top: 1px solid rgba(255,255,255,.24); }
.quick-reference dt { color: #c9e0ee; font-size: .76rem; font-weight: 750; }
.quick-reference dd { margin: 0; color: white; font-size: .82rem; font-weight: 650; }
.article-overview { grid-template-columns: 1fr; }
.article-overview figure { max-width: 790px; height: auto; aspect-ratio: 16/9; }
.article-overview > div { min-width: 0; }
.article-figure--wide img { max-height: none; aspect-ratio: 16/9; }
.article-faq > h3 { margin-top: 30px; }
.article-summary h2 { font-size: clamp(2rem, 3vw, 2.8rem); }
.article-footer img { flex: 0 0 68px; }
.related-articles__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 1040px) {
    .article-hero__grid { grid-template-columns: 1fr; }
    .quick-reference { max-width: 790px; }
    .related-articles__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
    .article-hero h1 { font-size: clamp(2.35rem, 10vw, 3.3rem); }
    .quick-reference > img { height: auto; aspect-ratio: 16/9; }
    .quick-reference dl div { grid-template-columns: 95px 1fr; }
    .article-overview figure { height: auto; }
    .related-articles__grid { grid-template-columns: 1fr; }
}