/* ── Navigation tabs ─────────────────────────────── */
.site-tabs {
  display: inline-flex;
  gap: 2px;
  margin: 0 auto 0.75rem;
  padding: 3px;
  border: 1px solid rgba(4, 51, 97, 0.14);
  border-radius: 8px;
  background: #F3F8FC;
}

.site-tabs a {
  min-width: 58px;
  padding: 0.42rem 0.56rem;
  border-radius: 6px;
  color: #334155;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.72rem;
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: none;
  transition: background 0.15s, color 0.15s;
}

.site-tabs a:hover,
.site-tabs a:focus-visible {
  color: #043361;
  background: rgba(4, 51, 97, 0.08);
  border-bottom: none;
}

.site-tabs a.is-active {
  color: #F3F8FC;
  background: #043361;
  border-bottom: none;
}

/* ── Blog index wrapper ──────────────────────────── */
.blog-index {
  max-width: 650px;
}

.blog-eyebrow {
  margin: 0 0 1.2rem;
  color: #043361;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid #043361;
  display: inline-block;
}

.blog-index h2 {
  font-family: 'Fraunces', Georgia, serif;
  margin-bottom: 0.55rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.blog-intro {
  max-width: 38rem;
  color: #595959;
  line-height: 1.58;
}

/* ── Blog list ───────────────────────────────────── */
.blog-list {
  margin-top: 1.4rem;
  border-top: 1px solid #D7E4EE;
}

.blog-list-item {
  display: block;
  padding: 1.1rem 0;
  border-bottom: 1px solid #D7E4EE;
  color: inherit;
  border-left: none;
  border-right: none;
  transition: background 0.12s;
}

.blog-list-item:hover,
.blog-list-item:focus-visible {
  color: inherit;
  border-bottom: 1px solid #D7E4EE;
}

.blog-list-item__meta,
.blog-list-item__title,
.blog-list-item__summary {
  display: block;
}

.blog-list-item__meta {
  margin-bottom: 0.4rem;
  color: #8A99A8;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.blog-list-item__title {
  font-family: 'Fraunces', Georgia, serif;
  color: #043361;
  font-size: 1.18rem;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.005em;
  border-bottom: none;
  transition: color 0.15s;
}

.blog-list-item:hover .blog-list-item__title {
  color: #1F2933;
}

.blog-list-item__summary {
  margin-top: 0.38rem;
  color: #595959;
  line-height: 1.52;
  font-size: 0.95rem;
}

/* ── Section anchor nav ──────────────────────────── */
.section-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 1.6rem;
}

.section-nav__btn {
  padding: 0.28rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(4, 51, 97, 0.22);
  border-bottom: 1px solid rgba(4, 51, 97, 0.22);
  background: transparent;
  color: #043361;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.section-nav__btn:hover {
  background: #043361;
  color: #F3F8FC;
  border-color: #043361;
  border-bottom-color: #043361;
}

/* ── Scroll-to-top button ────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #043361;
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s, background 0.15s;
  z-index: 999;
  box-shadow: 0 4px 12px rgba(4, 51, 97, 0.28);
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.scroll-top:hover {
  background: #1F2933;
  transform: translateY(-2px);
}

@media print, screen and (max-width: 960px) {
  .site-tabs {
    margin-bottom: 0.25rem;
  }
}