:root {
  color-scheme: light;
  --ink: #132b42;
  --muted: #5e7082;
  --blue: #1767b1;
  --blue-dark: #104c87;
  --teal: #0e9aa7;
  --paper: #f4f7fb;
  --line: #e0e8f1;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--paper); color: var(--ink); font-family: 'Manrope', sans-serif; line-height: 1.7; }
a { color: var(--blue); }

/* Header */
.site-nav {
  align-items: center;
  background: rgba(255, 255, 255, .95);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 16px;
  justify-content: space-between;
  padding: 14px max(20px, calc((100% - 1160px) / 2));
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-logo { align-items: center; color: var(--blue); display: inline-flex; font-size: 18px; font-weight: 800; gap: 10px; text-decoration: none; }
.site-logo .mark {
  background: #fff url("/logo.png") -48px -13px / auto 100px no-repeat;
  border-radius: 11px;
  box-shadow: 0 0 0 1px var(--line);
  height: 44px;
  width: 50px;
}
.site-nav ul { display: flex; flex-wrap: wrap; gap: 22px; list-style: none; }
.site-nav ul a { color: var(--ink); font-size: 14px; font-weight: 700; text-decoration: none; }
.site-nav ul a:hover, .site-nav ul a[aria-current="page"] { color: var(--blue); }

/* Article list */
.page-head { background: linear-gradient(120deg, #0a274d, #0b5f86 60%, #0e9aa7); color: #fff; padding: 64px 20px 56px; text-align: center; }
.page-head .label { color: #a9e3ff; font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.page-head h1 { font-size: clamp(30px, 4vw, 44px); letter-spacing: -.03em; line-height: 1.2; margin: 8px 0 10px; }
.page-head p { color: #d6eaf5; margin: 0 auto; max-width: 620px; }
.article-grid { display: grid; gap: 22px; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0 auto; max-width: 1160px; padding: 48px 20px 72px; }
.article-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  color: inherit;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  text-decoration: none;
  transition: box-shadow .3s ease, transform .3s ease;
}
.article-card:hover { box-shadow: 0 20px 44px rgba(23, 103, 177, .13); transform: translateY(-6px); }
.cover { aspect-ratio: 16 / 9; background: linear-gradient(135deg, #1767b1, #0e9aa7); display: block; object-fit: cover; width: 100%; }
.cover-fallback { align-items: center; color: #fff; display: flex; font-size: 42px; justify-content: center; }
.article-card .body { display: flex; flex: 1; flex-direction: column; padding: 20px 22px 22px; }
.meta { color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.article-card h2 { font-size: 19px; letter-spacing: -.02em; line-height: 1.35; margin: 8px 0 10px; }
.article-card p { color: var(--muted); flex: 1; font-size: 14px; }
.read-more { color: var(--blue); font-size: 13px; font-weight: 800; margin-top: 14px; }
.empty { color: var(--muted); grid-column: 1 / -1; padding: 40px 0; text-align: center; }

/* Single article */
.article { margin: 0 auto; max-width: 760px; padding: 40px 20px 72px; }
.back { font-size: 14px; font-weight: 700; text-decoration: none; }
.article h1 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -.03em; line-height: 1.2; margin: 18px 0 10px; }
.article .summary { color: var(--muted); font-size: 18px; margin-bottom: 18px; }
.article .cover { border-radius: 18px; margin: 22px 0 30px; }
.prose { font-size: 17px; }
.prose p, .prose ul, .prose ol { margin-bottom: 18px; }
.prose ul, .prose ol { padding-left: 24px; }
.prose li { margin-bottom: 8px; }
.prose h2 { font-size: 24px; letter-spacing: -.02em; margin: 32px 0 12px; }
.prose h3 { font-size: 20px; margin: 26px 0 10px; }
.prose strong { color: var(--ink); }
.prose blockquote { border-left: 4px solid var(--teal); color: var(--muted); margin: 0 0 18px; padding: 4px 0 4px 18px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 26px 0; }
.tags span { background: #e4f2fb; border-radius: 999px; color: var(--blue-dark); font-size: 12px; font-weight: 700; padding: 5px 12px; }
.cta-box { background: linear-gradient(130deg, #143b66, #102f50 68%, #164e70); border-radius: 18px; color: #fff; margin-top: 34px; padding: 26px; }
.cta-box h2 { font-size: 21px; margin-bottom: 6px; }
.cta-box p { color: #d6e5df; margin-bottom: 16px; }
.btn { align-items: center; border: 1px solid transparent; border-radius: 999px; display: inline-flex; font-size: 14px; font-weight: 800; gap: 8px; margin: 4px 6px 4px 0; padding: 11px 18px; text-decoration: none; }
.btn.primary { background: #a7e4ff; color: #103451; }
.btn.secondary { border-color: rgba(255, 255, 255, .5); color: #fff; }
.btn.linkedin { background: #0a66c2; color: #fff; }
.share { align-items: center; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; padding-top: 20px; }
.share b { font-size: 14px; margin-right: 6px; }
.share a { background: #fff; border: 1px solid var(--line); border-radius: 999px; color: var(--ink); font-size: 13px; font-weight: 700; padding: 7px 14px; text-decoration: none; }

.site-footer { background: #10243a; color: #dce8e2; font-size: 13px; padding: 22px 20px; text-align: center; }
.site-footer a { color: #a9e3ff; }

@media (max-width: 900px) { .article-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) {
  .article-grid { grid-template-columns: 1fr; }
  .site-nav { padding: 10px 16px; }
  .site-logo { font-size: 15px; white-space: nowrap; }
  .site-logo .mark { height: 38px; width: 44px; background-position: -42px -11px; background-size: auto 88px; }
  .site-nav ul { flex-wrap: nowrap; gap: 14px; }
  .site-nav ul li:not(.keep) { display: none; }
}