/* HabiTide blog — self-contained stylesheet (light theme, matches main site) */
:root {
  --bg: #ffffff;
  --surface: #f5f5f7;
  --surface-2: #ececf0;
  --border: #e2e2e7;
  --text: #1d1d1f;
  --text-2: #48484d;
  --text-3: #86868b;
  --primary: #227eff;
  --primary-soft: rgba(34, 126, 255, 0.10);
  --green: #1fa83c;
  --amber: #c77c02;
  --red: #e0342a;
  --radius: 16px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 17px; }
.nav-logo img { width: 28px; height: 28px; border-radius: 7px; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { color: var(--text-2); text-decoration: none; font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: var(--primary); color: #fff !important; padding: 8px 16px;
  border-radius: 999px; font-weight: 600;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
.wrap-wide { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ─ Article header ─ */
.post-head { padding: 56px 0 8px; }
.crumbs { font-size: 13px; color: var(--text-3); margin-bottom: 18px; }
.crumbs a { color: var(--text-3); text-decoration: none; }
.crumbs a:hover { color: var(--primary); }
.tag {
  display: inline-block; background: var(--primary-soft); color: var(--primary);
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 5px 12px; border-radius: 999px; margin-bottom: 16px;
}
h1 { font-size: clamp(30px, 5vw, 44px); line-height: 1.15; letter-spacing: -0.02em; font-weight: 800; }
.post-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 20px 0 8px; color: var(--text-3); font-size: 14px; }
.post-meta strong { color: var(--text-2); font-weight: 600; }

/* ─ Body typography ─ */
article { padding: 28px 0 40px; }
article h2 { font-size: 27px; letter-spacing: -0.01em; margin: 48px 0 14px; line-height: 1.25; }
article h3 { font-size: 20px; margin: 32px 0 10px; }
article p { margin: 0 0 18px; color: var(--text-2); font-size: 17px; }
article p strong, article li strong { color: var(--text); }
article a { color: var(--primary); text-decoration: none; }
article a:hover { text-decoration: underline; }
article ul, article ol { margin: 0 0 18px 22px; color: var(--text-2); font-size: 17px; }
article li { margin-bottom: 8px; }
.lead { font-size: 19px; color: var(--text-2); }

/* ─ TL;DR / callouts ─ */
.tldr {
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--primary);
  border-radius: var(--radius); padding: 22px 24px; margin: 28px 0;
}
.tldr h2, .tldr h3 { margin: 0 0 10px !important; font-size: 16px !important; text-transform: uppercase; letter-spacing: 0.06em; color: var(--primary); }
.tldr ul { margin-bottom: 0; }
.callout {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 22px; margin: 24px 0; font-size: 16px; color: var(--text-2);
}
.callout.tip { border-left: 3px solid var(--green); }
.callout.warn { border-left: 3px solid var(--amber); }

/* ─ Tables ─ */
.table-scroll { overflow-x: auto; margin: 24px 0; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 520px; }
th { background: var(--surface); color: var(--text); text-align: left; padding: 12px 16px; font-weight: 600; white-space: nowrap; }
td { padding: 12px 16px; border-top: 1px solid var(--border); color: var(--text-2); }
tr:hover td { background: rgba(0,0,0,0.02); }

/* ─ Figures / charts ─ */
figure { margin: 30px 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
figure svg { width: 100%; height: auto; display: block; }
figcaption { margin-top: 12px; font-size: 13.5px; color: var(--text-3); text-align: center; }

/* ─ Quote ─ */
blockquote {
  border-left: 3px solid var(--primary); margin: 26px 0; padding: 6px 0 6px 22px;
  color: var(--text); font-size: 18px; font-style: italic;
}
blockquote cite { display: block; margin-top: 8px; font-size: 14px; color: var(--text-3); font-style: normal; }

/* ─ CTA box ─ */
.cta-box {
  background: linear-gradient(135deg, rgba(34,126,255,0.10), rgba(34,126,255,0.03));
  border: 1px solid rgba(34,126,255,0.30); border-radius: var(--radius);
  padding: 30px 28px; margin: 40px 0; text-align: center;
}
.cta-box h3 { margin: 0 0 8px; font-size: 22px; }
.cta-box p { margin: 0 auto 18px; max-width: 480px; font-size: 15.5px; }
.cta-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
  font-weight: 600; font-size: 15px; padding: 12px 22px; border-radius: 999px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #1668da; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); background: #fff; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* ─ FAQ ─ */
.faq { margin: 26px 0; }
.faq details {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 20px; margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; color: var(--text); font-size: 16px; }
.faq details p { margin: 12px 0 0; font-size: 15.5px; }

/* ─ Sources ─ */
.sources { margin: 30px 0 0; padding-top: 18px; border-top: 1px solid var(--border); }
.sources h2 { font-size: 18px !important; }
.sources ol { font-size: 14px; color: var(--text-3); }
.sources a { color: var(--text-2); }

/* ─ Blog index ─ */
.index-hero { text-align: center; padding: 64px 0 40px; }
.index-hero p { color: var(--text-2); max-width: 560px; margin: 14px auto 0; font-size: 17px; }
.post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; padding-bottom: 60px; }
.post-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; text-decoration: none; color: var(--text); display: flex; flex-direction: column;
  box-shadow: 0 8px 20px -12px rgba(0,0,0,0.08);
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.post-card:hover { transform: translateY(-3px); border-color: var(--primary); box-shadow: 0 14px 30px -12px rgba(34,126,255,0.25); }
.post-card .thumb { aspect-ratio: 1200/630; width: 100%; display: block; background: var(--surface); }
.post-card .pad { padding: 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.post-card h2 { font-size: 19px; line-height: 1.35; margin: 0; }
.post-card p { color: var(--text-2); font-size: 14.5px; margin: 0; flex: 1; }
.post-card .meta { color: var(--text-3); font-size: 13px; }

/* ─ Footer ─ */
.foot { border-top: 1px solid var(--border); padding: 34px 0; margin-top: 30px; background: var(--surface); }
.foot-inner { max-width: 1080px; margin: 0 auto; padding: 0 20px; display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; color: var(--text-3); font-size: 14px; }
.foot a { color: var(--text-2); text-decoration: none; margin-left: 16px; }
.foot a:hover { color: var(--primary); }

@media (max-width: 640px) {
  .nav-links a:not(.nav-cta) { display: none; }
  article h2 { font-size: 23px; }
}