/* ── Atlas Copper International — Blog / Insights stylesheet ──────────────────
   Reuses the homepage design tokens, typography and chrome so blog pages
   feel native to atlascopperintl.com. */

:root {
  --bg: #f3ede2;
  --bg-warm: #ebe3d4;
  --ink: #181612;
  --ink-soft: #4a4339;
  --line: #d6cdb9;
  --copper: #b66e3c;
  --copper-deep: #8a4f28;
  --copper-bright: #d4854a;
  --patina: #2d4a3e;
  --cream: #faf6ee;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: Georgia, 'Times New Roman', Times, serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1;
}
a { color: var(--copper-deep); }
img { max-width: 100%; height: auto; display: block; }

/* === TOP BAR === */
.topbar { background: var(--ink); color: var(--cream); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase; }
.topbar-inner { max-width: 1100px; margin: 0 auto; padding: 10px 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.topbar a { color: var(--cream); text-decoration: none; opacity: 0.85; margin-left: 20px; }
.topbar a:hover { opacity: 1; color: var(--copper-bright); }
.topbar-left { color: rgba(250,246,238,0.55); }
.topbar-left b { color: var(--copper-bright); font-weight: normal; }

/* === NAV === */
nav { background: var(--bg); border-bottom: 1px solid var(--line); position: sticky;
  top: 0; z-index: 50; }
.nav-inner { max-width: 1100px; margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo-img { height: 52px; width: auto; display: block; }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a { color: var(--ink); text-decoration: none; font-size: 14px;
  letter-spacing: 0.04em; text-transform: uppercase; padding-bottom: 3px;
  border-bottom: 1px solid transparent; transition: border-color .2s, color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--copper-deep); border-color: var(--copper); }
.quote-btn { display: inline-flex; align-items: center; gap: 8px; background: var(--copper);
  color: var(--cream); text-decoration: none; padding: 11px 20px; font-size: 13px;
  letter-spacing: 0.06em; text-transform: uppercase; border-radius: 2px; transition: background .2s; }
.quote-btn:hover { background: var(--copper-deep); }
.quote-btn svg { width: 16px; height: 16px; }
@media (max-width: 760px) { .nav-links { display: none; } }

/* === ARTICLE LAYOUT === */
.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.breadcrumb { font-size: 13px; letter-spacing: 0.03em; color: var(--ink-soft);
  margin: 28px auto 0; text-transform: uppercase; }
.breadcrumb a { color: var(--ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--copper-deep); }
.breadcrumb span { color: var(--copper-deep); }

article { padding: 8px 0 64px; }
.article-eyebrow { color: var(--copper-deep); font-size: 13px; letter-spacing: 0.12em;
  text-transform: uppercase; margin: 36px 0 14px; }
article h1 { font-size: clamp(30px, 5vw, 44px); line-height: 1.15; letter-spacing: -0.01em;
  margin-bottom: 18px; }
.article-meta { color: var(--ink-soft); font-size: 14px; font-style: italic;
  padding-bottom: 26px; margin-bottom: 34px; border-bottom: 2px solid var(--line); }
.lead { font-size: 20px; line-height: 1.6; color: var(--ink-soft); margin-bottom: 30px; }
article h2 { font-size: 27px; line-height: 1.25; margin: 44px 0 16px;
  padding-top: 8px; }
article h3 { font-size: 20px; margin: 30px 0 12px; color: var(--copper-deep); }
article p { margin-bottom: 20px; }
article ul, article ol { margin: 0 0 22px 24px; }
article li { margin-bottom: 9px; }
article strong { color: var(--ink); }
blockquote { border-left: 3px solid var(--copper); background: var(--bg-warm);
  margin: 28px 0; padding: 18px 24px; font-style: italic; color: var(--ink-soft); }

/* spec / comparison tables */
.spec-table { width: 100%; border-collapse: collapse; margin: 26px 0; font-size: 15px; }
.spec-table caption { text-align: left; font-style: italic; color: var(--ink-soft);
  font-size: 14px; margin-bottom: 8px; }
.spec-table th, .spec-table td { text-align: left; padding: 11px 14px;
  border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table thead th { background: var(--ink); color: var(--cream); font-weight: normal;
  letter-spacing: 0.04em; text-transform: uppercase; font-size: 12px; }
.spec-table tbody tr:nth-child(even) { background: var(--bg-warm); }

/* callout */
.callout { background: var(--cream); border: 1px solid var(--line); border-left: 4px solid var(--copper);
  padding: 20px 24px; margin: 28px 0; border-radius: 2px; }
.callout h4 { font-size: 15px; letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--copper-deep); margin-bottom: 8px; }
.callout p:last-child { margin-bottom: 0; }

/* inline CTA */
.cta { background: var(--ink); color: var(--cream); padding: 34px 32px; border-radius: 3px;
  margin: 44px 0; text-align: center; }
.cta h3 { color: var(--cream); font-size: 24px; margin-bottom: 10px; }
.cta p { color: rgba(250,246,238,0.8); margin-bottom: 20px; }
.cta .quote-btn { background: var(--copper); }
.cta .quote-btn:hover { background: var(--copper-bright); }

/* FAQ */
.faq { margin: 34px 0; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { font-size: 18px; cursor: pointer; color: var(--ink); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: '+'; color: var(--copper); margin-right: 12px; font-weight: bold; }
.faq details[open] summary::before { content: '–'; }
.faq details p { margin: 14px 0 4px; color: var(--ink-soft); }

/* related / next reads */
.related { border-top: 2px solid var(--line); padding: 36px 0 8px; margin-top: 12px; }
.related h3 { font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-soft); margin-bottom: 18px; }
.related ul { list-style: none; }
.related li { margin-bottom: 12px; }
.related a { font-size: 19px; text-decoration: none; }
.related a:hover { text-decoration: underline; }

/* === BLOG INDEX === */
.blog-hero { max-width: 1100px; margin: 0 auto; padding: 56px 24px 30px; }
.blog-hero .article-eyebrow { margin-top: 0; }
.blog-hero h1 { font-size: clamp(34px, 6vw, 52px); line-height: 1.1; margin-bottom: 14px; }
.blog-hero p { font-size: 20px; color: var(--ink-soft); max-width: 620px; }
.card-grid { max-width: 1100px; margin: 0 auto; padding: 20px 24px 72px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 28px; }
.card { background: var(--cream); border: 1px solid var(--line); border-radius: 3px;
  padding: 28px 26px; text-decoration: none; color: var(--ink); display: flex;
  flex-direction: column; transition: transform .2s, box-shadow .2s, border-color .2s; }
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(24,22,18,0.08);
  border-color: var(--copper); }
.card .tag { color: var(--copper-deep); font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; margin-bottom: 12px; }
.card h2 { font-size: 22px; line-height: 1.25; margin-bottom: 10px; }
.card p { color: var(--ink-soft); font-size: 15px; line-height: 1.6; flex-grow: 1; }
.card .read { color: var(--copper-deep); font-size: 14px; letter-spacing: 0.04em;
  text-transform: uppercase; margin-top: 16px; }

/* === FOOTER === */
footer { background: var(--ink); color: var(--cream); margin-top: 40px; }
.footer-inner { max-width: 1100px; margin: 0 auto; padding: 56px 24px 28px; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px;
  padding-bottom: 36px; border-bottom: 1px solid rgba(250,246,238,0.15); }
.footer-brand h3 { font-size: 22px; margin-bottom: 14px; color: var(--cream); }
.footer-brand p { color: rgba(250,246,238,0.7); font-size: 14px; line-height: 1.7; }
.footer-col h4 { font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--copper-bright); margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { color: rgba(250,246,238,0.75); font-size: 14px; line-height: 1.6; margin-bottom: 10px; }
.footer-col a { color: rgba(250,246,238,0.75); text-decoration: none; }
.footer-col a:hover { color: var(--copper-bright); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  padding-top: 22px; font-size: 12px; color: rgba(250,246,238,0.5); }
@media (max-width: 760px) { .footer-top { grid-template-columns: 1fr; gap: 28px; } }