:root {
  --contrast: #17212b;
  --muted: #5c6670;
  --canvas: #f4f6f8;
  --surface: #fff;
  --border: #dce2e8;
  --accent: #0b5e8e;
  --brand: #14395b;
  --max-width: 1160px;
}

body { color: var(--contrast); background: var(--canvas); }
.header-inner { min-height: 88px; }
.brand { color: var(--brand); font-size: 1.65rem; font-weight: 800; letter-spacing: -.03em; }
#site-nav { gap: 0; }
#site-nav a { padding: 18px 15px; font-weight: 650; }
.page-shell { display: block; margin-top: 28px; }
.sidebar { display: none; }

.home-intro { max-width: 850px; padding: 42px 0 34px; }
.home-intro .eyebrow { margin: 0 0 8px; color: var(--accent); font-size: .82rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.home-intro h1 { max-width: 760px; margin: 0; color: var(--brand); font-size: clamp(2.2rem, 5vw, 4.4rem); line-height: .98; letter-spacing: -.055em; }
.home-intro > p:last-child { max-width: 670px; margin: 22px 0 0; color: var(--muted); font-size: 1.12rem; }

.home-sections { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-bottom: 34px; border: 1px solid var(--border); background: var(--surface); }
.home-sections a { padding: 20px 16px; color: var(--contrast); border-right: 1px solid var(--border); font-weight: 700; text-align: center; text-decoration: none; }
.home-sections a:last-child { border-right: 0; }
.home-sections a:hover, .home-sections a:focus { color: var(--accent); background: #f2f8fc; }

.home-posts > h2 { margin: 0 0 18px; font-size: 1.65rem; }
.home-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.home-grid .entry { margin: 0; padding: 23px; }
.home-grid .entry h2 { font-size: 1.15rem; }
.home-grid .entry p { color: var(--muted); font-size: .94rem; }

.entry, .archive-header { border-top: 4px solid var(--brand); }
.entry h1, .entry h2, .archive-header h1 { color: var(--brand); font-weight: 700; }
.single-entry { max-width: 820px; margin-left: auto; margin-right: auto; }
.single-entry h2 { margin-top: 1.8em; }
.single-entry li + li { margin-top: .45em; }
.archive-intro { max-width: 700px; color: var(--muted); }
.post-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.post-list .entry { margin: 0; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; }
.footer-inner a { color: var(--muted); }

@media (max-width: 860px) {
  .home-sections, .home-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .home-sections a { border-bottom: 1px solid var(--border); }
}

@media (max-width: 620px) {
  .home-intro { padding-top: 24px; }
  .home-sections, .home-grid, .post-list { grid-template-columns: 1fr; }
  .home-sections a { border-right: 0; }
  .footer-inner { flex-direction: column; gap: 8px; }
}