:root {
  --ink: #101820;
  --muted: #4a5a66;
  --line: #d5dde3;
  --paper: #eef2f4;
  --panel: #f7f9fa;
  --teal: #0b5c63;
  --teal-deep: #083f44;
  --accent: #c45c26;
  --max: 780px;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --display: "Source Serif 4", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #d9ecec 0%, transparent 55%),
    linear-gradient(180deg, #e7eef1 0%, var(--paper) 28%, #e9eef1 100%);
  line-height: 1.65;
  font-size: 16px;
}
a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--teal-deep); }
.wrap { width: min(var(--max), calc(100% - 2.5rem)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(247, 249, 250, 0.9);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: 1rem; flex-wrap: wrap; padding: 0.5rem 0;
}
.logo {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
  text-decoration: none;
}
.site-nav { display: flex; flex-wrap: wrap; gap: 0.9rem 1.15rem; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 0.9rem; font-weight: 500; }
.site-nav a:hover { color: var(--teal); }

.hero { padding: 3rem 0 2rem; border-bottom: 1px solid var(--line); }
.eyebrow {
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--teal);
}
.hero h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.9rem, 4.2vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.lede { margin: 1rem 0 0; color: var(--muted); font-size: 1.05rem; }

.section { padding: 2.5rem 0; }

.post-list { display: grid; gap: 2rem; }
.post-card { padding-bottom: 2rem; border-bottom: 1px solid var(--line); }
.post-card:last-child { border-bottom: none; padding-bottom: 0; }
.post-date {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.post-card h2 {
  margin: 0 0 0.6rem;
  font-family: var(--display);
  font-size: 1.4rem;
  letter-spacing: -0.01em;
}
.post-card h2 a { color: var(--ink); text-decoration: none; }
.post-card h2 a:hover { color: var(--teal); }
.post-card p { color: var(--muted); margin: 0.5rem 0; }
.read-more { font-weight: 600; }

/* Single post page */
.post-header { padding: 2.5rem 0 1.5rem; border-bottom: 1px solid var(--line); }
.post-header .eyebrow { margin-bottom: 0.6rem; }
.post-header h1 { margin: 0 0 0.6rem; font-family: var(--display); font-size: clamp(1.8rem, 4vw, 2.4rem); line-height: 1.2; }
.post-meta { color: var(--muted); font-size: 0.9rem; }
.post-body { padding: 2rem 0; }
.post-body p { margin: 0 0 1.1rem; color: var(--ink); font-size: 1.05rem; line-height: 1.75; }
.post-body h2 { font-family: var(--display); font-size: 1.3rem; margin: 2rem 0 0.8rem; }
.post-body blockquote {
  margin: 1.5rem 0;
  padding: 0.2rem 1.2rem;
  border-left: 3px solid var(--teal);
  color: var(--muted);
  font-style: italic;
}
.back-link { display: inline-block; margin-top: 1rem; font-weight: 600; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.6rem 0 2.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.site-footer p { margin: 0; }