/* Seabird Research brand v1.0: warm coast, cool sea. */
  :root {
    /* warm: the coast */
    --sand: #F3EEE4;      /* Paper Sand: primary light ground */
    --dune: #E4D7BE;      /* Dune: deeper sand, tags */
    --coral: #E8623A;     /* Puffin Coral: one spark per composition, never as text */
    --shell: #FBF8F1;     /* Warm White: cards on sand */
    /* cool: the sea */
    --ink: #08222E;       /* Abyssal: primary dark, headlines */
    --sea: #1B6E8C;       /* Tidal: links, key data */
    --kelp: #2F5D4B;      /* Kelp: habitat and ecosystem */
    --slate: #6C8A97;     /* Coastal Slate: dividers only (3.2:1, too light for text) */
    --muted: #4A6470;     /* slate deepened for secondary text (5.4:1, AA) */
    --line: #E4D7BE;
    --coral-ink: #241009; /* dark ink for text on coral */
    --serif: "Fraunces", Georgia, serif;
    --sans: "Inter", system-ui, sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, monospace;
    --gutter: clamp(16px, 5vw, 48px);
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    background: var(--sand);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 17px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; }
  .wrap { max-width: 1080px; margin: 0 auto; padding: 0 var(--gutter); }
  .eyebrow {
    font-size: 12px; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--sea);
  }

  header .wrap {
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    padding-top: 28px; padding-bottom: 28px;
  }
  .brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
  .brand img.mark { width: 60px; height: auto; }
  .brand img.wordmark { height: 15px; width: auto; }
  header nav { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: flex-end; }
  header nav a {
    font-size: 13px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase;
    text-decoration: none; color: var(--muted);
  }
  header nav a:hover { color: var(--ink); }

  .hero .wrap { padding-top: clamp(56px, 10vw, 120px); padding-bottom: clamp(56px, 10vw, 112px); }
  .hero h1 {
    font-family: var(--serif); font-weight: 400;
    font-size: clamp(44px, 7vw, 92px); line-height: 1.04; letter-spacing: -0.01em; font-weight: 500;
    max-width: 14ch; margin-top: 20px;
  }
  .hero p.lede { margin-top: 28px; max-width: 58ch; font-size: clamp(18px, 1.6vw, 20px); color: var(--muted); }

  .band { background: var(--ink); color: var(--sand); }
  .band .wrap { padding-top: 64px; padding-bottom: 64px; }
  .band .eyebrow { color: var(--dune); font-family: var(--sans); font-size: 12px; line-height: 1.6; margin-bottom: 14px; }
  .band .mission-label { margin-top: 40px; }
  .band p.mission { font-family: var(--sans); font-size: clamp(17px, 1.5vw, 19px); line-height: 1.65; max-width: 62ch; color: var(--sand); opacity: .9; }
  .band p {
    font-family: var(--serif); font-size: clamp(22px, 2.6vw, 30px); line-height: 1.35;
    max-width: 36ch;
  }

  .topics .wrap { padding-top: 88px; padding-bottom: 40px; }
  .topics h2, .preserves h2, .contact h2 {
    font-family: var(--serif); font-weight: 500;
    font-size: clamp(30px, 3.6vw, 42px); line-height: 1.15; margin-top: 12px;
  }
  .grid {
    display: grid; gap: 20px; margin-top: 44px;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr));
  }
  .card {
    background: var(--shell); border: 1px solid var(--line); border-radius: 4px;
    padding: 28px 24px 26px;
  }
  .card h3 { font-family: var(--serif); font-weight: 600; font-size: 21px; line-height: 1.25; }
  .card p.sub { margin-top: 6px; font-size: 14px; color: var(--muted); }
  .card ul { list-style: none; margin-top: 18px; border-top: 1px solid var(--line); }
  .card li { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .card li strong { display: block; font-weight: 600; }
  .card li span { display: block; color: var(--muted); font-size: 14px; }
  .card li:last-child { border-bottom: 0; padding-bottom: 0; }

  .preserves .wrap { padding-top: 48px; padding-bottom: 88px; }
  .preserves p.intro { margin-top: 16px; max-width: 58ch; color: var(--muted); }
  .preserve-list {
    display: grid; gap: 0; margin-top: 36px; border-top: 1px solid var(--ink);
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  }
  .preserve-list div { padding: 22px 0 6px; border-bottom: 1px solid var(--line); margin-right: 24px; }
  .preserve-list strong { display: block; font-family: var(--serif); font-weight: 600; font-size: 22px; }
  .preserve-list span.where { display: block; font-size: 12px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sea); margin-top: 4px; }
  .preserve-list p { font-size: 15px; color: var(--muted); margin: 8px 0 16px; }


  .why .wrap { padding-top: 88px; }
  .why p.intro, .resources p.intro { margin-top: 16px; max-width: 62ch; color: var(--muted); }
  .why h2, .act h2, .resources h2 {
    font-family: var(--serif); font-weight: 500;
    font-size: clamp(30px, 3.6vw, 42px); line-height: 1.15; margin-top: 12px;
  }
  h2.second { margin-top: 72px !important; }
  .act { background: var(--shell); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .act .wrap, .resources .wrap { padding-top: 88px; padding-bottom: 88px; }
  .cols {
    display: grid; gap: 28px 40px; margin-top: 36px;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  }
  .cols div { border-top: 2px solid var(--sea); padding-top: 16px; }
  .cols strong { font-family: var(--serif); font-weight: 600; font-size: 20px; }
  .cols strong a { text-decoration: none; }
  .cols strong a::after { content: " \2197"; color: var(--sea); font-size: 16px; }
  .cols strong a:hover { color: var(--sea); }
  .cols p { margin-top: 6px; font-size: 15px; color: var(--muted); }
  .orders {
    display: grid; margin-top: 32px; border-top: 1px solid var(--ink);
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); column-gap: 32px;
  }
  .orders div { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .orders em { display: block; font-family: var(--serif); font-size: 20px; }
  .orders span { font-size: 14px; color: var(--muted); }
  .orgs {
    list-style: none; margin-top: 28px; columns: 2 300px; column-gap: 40px;
  }
  .orgs li { break-inside: avoid; padding: 10px 0; border-bottom: 1px solid var(--line); }
  .orgs a { text-decoration: none; }
  .orgs a::after { content: " \2197"; color: var(--sea); }
  .orgs a:hover { color: var(--sea); }


  /* whole card clickable, with an arrow cue */
  .linked { position: relative; transition: background-color .15s; }
  .linked a { text-decoration: none; }
  .linked a::before { content: ""; position: absolute; inset: 0; }
  .linked a::after { content: " \2192"; color: var(--sea); font-style: normal; font-family: var(--sans); font-size: 15px; }
  .linked:hover a { color: var(--sea); text-decoration: underline; text-underline-offset: 3px; }
  .linked a:focus-visible { outline: none; }
  .linked:focus-within { outline: 2px solid var(--sea); outline-offset: 4px; }

  .contact { border-top: 1px solid var(--line); }
  .contact .wrap { padding-top: 72px; padding-bottom: 88px; }
  .contact p { margin-top: 16px; max-width: 54ch; color: var(--muted); }
  .contact a.email {
    display: inline-block; margin-top: 24px;
    font-family: var(--serif); font-size: clamp(22px, 2.6vw, 28px);
    text-decoration: none; border-bottom: 2px solid var(--sea); padding-bottom: 2px;
    overflow-wrap: anywhere;
  }
  .contact a.email:hover { color: var(--sea); }

  footer { background: var(--ink); color: var(--dune); }
  footer .wrap {
    display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px 32px;
    padding-top: 28px; padding-bottom: 28px; font-size: 13px;
  }
  footer .brand img.mark { width: 42px; }
  footer .brand img.wordmark { height: 10px; }

  @media (max-width: 900px) {
    header .wrap { flex-wrap: wrap; padding-top: 20px; padding-bottom: 16px; }
    header nav { width: 100%; justify-content: space-between; gap: 0; padding-top: 14px; border-top: 1px solid var(--line); }
    header nav a { font-size: 11px; letter-spacing: 0.08em; }
    .brand img.mark { width: 46px; }
    .brand img.wordmark { height: 11px; }
  }

  /* home: topic rows link to their pages */
  .card li a { display: block; text-decoration: none; }
  .card li a strong::after { content: " \2192"; color: var(--sea); font-weight: 400; }
  .card li a:hover strong { color: var(--sea); text-decoration: underline; text-underline-offset: 3px; }

  /* detail pages */
  .article .wrap { padding-top: 24px; padding-bottom: 88px; }
  .crumbs { font-size: 13px; color: var(--muted); margin-bottom: 40px; }
  .crumbs a { color: var(--muted); text-decoration: none; }
  .crumbs a:hover { color: var(--sea); text-decoration: underline; }
  .crumbs span { margin: 0 4px; }
  .crumbs span[aria-current] { margin: 0; color: var(--ink); }
  .article h1 {
    font-family: var(--serif); font-weight: 400;
    font-size: clamp(36px, 5.4vw, 60px); line-height: 1.08; letter-spacing: -0.01em; margin-top: 14px;
  }
  .article p.where { margin-top: 10px; font-size: 13px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sea); }
  .article p.lede { margin-top: 22px; max-width: 60ch; font-family: var(--serif); font-size: clamp(20px, 2vw, 24px); line-height: 1.45; color: var(--ink); }
  .article-grid {
    display: grid; gap: 48px; margin-top: 56px; align-items: start;
    grid-template-columns: minmax(0, 1fr) 300px;
  }
  .prose { max-width: 66ch; }
  .prose h2 { font-family: var(--serif); font-weight: 600; font-size: 24px; line-height: 1.25; margin: 40px 0 12px; }
  .prose h2:first-child { margin-top: 0; }
  .prose p { margin-top: 14px; }
  .prose ul { margin: 14px 0 0 20px; }
  .prose li { margin-top: 8px; }
  .facts { background: var(--shell); border: 1px solid var(--line); border-top: 3px solid var(--sea); border-radius: 4px; padding: 24px; position: sticky; top: 24px; }
  .facts h2 { font-size: 12px; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--sea); }
  .facts dl div { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .facts dl div:last-child { border-bottom: 0; padding-bottom: 0; }
  .facts dt { font-size: 12px; font-weight: 600; color: var(--muted); }
  .facts dd { margin: 2px 0 0; font-size: 15px; }
  .glance ul { list-style: none; margin-top: 8px; }
  .glance li { padding: 12px 0 12px 22px; border-bottom: 1px solid var(--line); font-size: 15px; position: relative; }
  .glance li:last-child { border-bottom: 0; padding-bottom: 0; }
  .glance li::before { content: ""; position: absolute; left: 2px; top: 21px; width: 8px; height: 8px; border-radius: 50%; background: var(--sea); }
  .involve { margin-top: 64px; background: var(--ink); color: var(--sand); border-radius: 4px; padding: 36px clamp(24px, 4vw, 44px); }
  .involve .eyebrow { color: var(--dune); }
  .involve p:not(.eyebrow) { margin-top: 10px; max-width: 60ch; font-family: var(--serif); font-size: 21px; line-height: 1.4; }
  .button {
    display: inline-block; margin-top: 22px; padding: 12px 20px; border-radius: 3px;
    background: var(--sand); color: var(--ink); font-size: 14px; font-weight: 600; text-decoration: none;
  }
  .button:hover { background: #fff; }
  .related, .sources { margin-top: 64px; }
  .related h2, .sources h2 { font-family: var(--serif); font-weight: 400; font-size: 28px; }
  .minis { display: grid; gap: 16px; margin-top: 20px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }
  .mini { display: block; background: var(--shell); border: 1px solid var(--line); border-radius: 4px; padding: 18px 20px; text-decoration: none; }
  .mini strong { display: block; font-family: var(--serif); font-weight: 600; font-size: 18px; }
  .mini strong::after { content: " \2192"; color: var(--sea); font-family: var(--sans); font-weight: 400; }
  .mini span { display: block; margin-top: 4px; font-size: 14px; color: var(--muted); }
  .mini:hover { border-color: var(--sea); }
  .mini:hover strong { color: var(--sea); }
  .sources ul { list-style: none; margin-top: 14px; }
  .sources li { padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .sources a { text-decoration: none; }
  .sources a::after { content: " \2197"; color: var(--sea); }
  .sources a:hover { color: var(--sea); }
  .pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--ink); }
  .pager a { text-decoration: none; font-family: var(--serif); font-size: 18px; max-width: 48%; }
  .pager a span { display: block; font-family: var(--sans); font-size: 12px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--sea); margin-bottom: 4px; }
  .pager .next { text-align: right; }
  .pager a:hover { color: var(--sea); }
  @media (max-width: 860px) {
    .article-grid { grid-template-columns: 1fr; gap: 40px; }
    .facts { position: static; }
  }

  /* get involved: two buttons */
  .involve-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
  .involve-actions .button { margin-top: 0; }
  .button.secondary { background: transparent; color: var(--sand); border: 1px solid var(--slate); }
  .button.secondary:hover { background: rgba(255,255,255,.08); }

  /* forum */
  .forum-top { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
  .forum-account { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; font-size: 14px; }
  .forum-account a { color: var(--sea); }
  .forum { margin-top: 32px; }
  .forum h2 { font-family: var(--serif); font-weight: 400; font-size: 28px; margin: 48px 0 16px; }
  .forum .lede { font-family: var(--serif); font-size: 20px; margin-bottom: 24px; }
  .article .lede a { color: var(--sea); }
  .forum .mini .meta { margin-top: 10px; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--sea); }
  .meta { font-size: 13px; color: var(--muted); }
  .thread-list { list-style: none; border-top: 1px solid var(--ink); }
  .thread-list li { padding: 14px 0; border-bottom: 1px solid var(--line); display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
  .thread-list li a { font-family: var(--serif); font-size: 19px; text-decoration: none; }
  .thread-list li a:hover { color: var(--sea); text-decoration: underline; }
  .thread-list .meta { flex-basis: 100%; }
  .forum-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; margin: 8px 0 32px; }
  .forum-actions .button { margin-top: 0; }
  .forum-actions a:not(.button) { color: var(--sea); font-size: 15px; }
  .article .button { background: var(--ink); color: var(--sand); }
  .article .button:hover { background: var(--sea); }
  .article .involve .button { background: var(--sand); color: var(--ink); }
  .article .involve .button.secondary { background: transparent; color: var(--sand); }
  .button.small { padding: 8px 14px; font-size: 13px; margin-top: 0; }
  .article .button.small.secondary { background: transparent; color: var(--ink); border: 1px solid var(--line); }
  .forum-account .button.small { background: var(--ink); color: var(--sand); text-decoration: none; }
  .badge { display: inline-block; padding: 2px 8px; border-radius: 3px; background: var(--shell); border: 1px solid var(--slate); color: var(--ink); font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; vertical-align: middle; }
  .badge.warn { background: var(--dune); border-color: var(--dune); color: var(--ink); }
  .posts { display: grid; gap: 16px; }
  .post { background: var(--shell); border: 1px solid var(--line); border-radius: 4px; padding: 20px 24px; }
  .post.pending, .post.review, .post.hidden { border-style: dashed; }
  .post header { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; margin-bottom: 10px; }
  .post-body p { margin-top: 10px; overflow-wrap: anywhere; }
  .post-body p:first-child { margin-top: 0; }
  .post-body a { color: var(--sea); }
  .post-actions { display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
  button.link { background: none; border: 0; padding: 0; color: var(--muted); font: inherit; font-size: 13px; cursor: pointer; text-decoration: underline; }
  button.link:hover { color: var(--sea); }
  .notice { margin: 16px 0; padding: 14px 18px; background: var(--shell); border-left: 3px solid var(--sea); border-radius: 0 4px 4px 0; font-size: 15px; }
  .notice.warn { background: var(--dune); border-left-color: var(--ink); }
  .notice a { color: var(--sea); }
  .forum-form { display: grid; gap: 18px; max-width: 640px; margin-top: 24px; }
  .forum-form h2 { margin: 24px 0 0; }
  .forum-form label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
  .forum-form label small { font-weight: 400; color: var(--muted); }
  .forum-form label.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 15px; }
  .forum-form label.check a { color: var(--sea); }
  .forum-form input[type=text], .forum-form input[type=email], .forum-form input[type=password], .forum-form select, .forum-form textarea {
    font: inherit; font-weight: 400; font-size: 16px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); width: 100%;
  }
  .forum-form textarea { resize: vertical; }
  .forum-form input:focus, .forum-form select:focus, .forum-form textarea:focus { outline: 2px solid var(--sea); outline-offset: 1px; border-color: var(--sea); }
  .forum-form .button { justify-self: start; border: 0; cursor: pointer; font-family: var(--sans); }
  .forum-form .button:disabled { opacity: .6; cursor: wait; }
  .tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
  .tabs button { background: none; border: 0; border-bottom: 2px solid transparent; padding: 10px 14px; font: inherit; font-size: 15px; color: var(--muted); cursor: pointer; }
  .tabs button.active { color: var(--ink); border-bottom-color: var(--sea); font-weight: 600; }

  .footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; }
  .footer-links a { color: var(--dune); }

  /* brand: data in monospace (counts, dates, codes) */
  .thread-list .meta, .post header .meta, .forum .mini .meta { font-family: var(--mono); font-size: 12px; letter-spacing: 0; text-transform: none; }
  .article h1 { font-weight: 500; letter-spacing: -0.01em; }

  /* brand: the coral spark. A primary call to action or the tracking path, once per page. */
  .button.coral, .article .button.coral, .forum-account .button.small.coral { background: var(--coral); color: var(--coral-ink); }
  .button.coral:hover { background: #F07A55; }

  /* brand: bathymetric contours and the tracking path in the hero */
  .hero { position: relative; overflow: hidden; }
  .hero .wrap { position: relative; z-index: 1; }
  .hero-art { position: absolute; top: 0; right: 0; width: 46%; height: 100%; pointer-events: none; }
  .hero-art .contour { fill: none; stroke: var(--dune); stroke-width: 1.2; }
  .hero-art .track { fill: none; stroke: var(--coral); stroke-width: 2.5; stroke-dasharray: 2 10; stroke-linecap: round; }
  .hero-art .fix { fill: var(--coral); }
  @media (max-width: 900px) { .hero-art { display: none; } }
  .hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 28px; margin-top: 36px; }
  .hero-actions .button { margin-top: 0; background: var(--ink); color: var(--sand); }
  .hero-actions .button:hover { background: var(--sea); }
  .hero-actions a:not(.button) { color: var(--sea); font-weight: 500; }