:root {
  --site-header-height: 76px;
  --site-header-surface: rgba(255, 255, 255, 0.92);
  --site-header-border: rgba(15, 23, 42, 0.08);
  --site-header-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
  --site-header-text: #0f172a;
  --site-header-muted: #475569;
  --site-header-accent: #1d4ed8;
  --site-header-accent-soft: rgba(29, 78, 216, 0.1);
  --site-header-max-width: 1180px;
  --site-header-side-gap: 20px;
}

body.has-site-header {
  padding-top: var(--site-header-height);
}

body.has-site-header[data-site-section="home"] {
  padding-top: 0;
}

.site-header,
.site-header *,
.site-header *::before,
.site-header *::after {
  box-sizing: border-box;
}

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1100;
  border-bottom: 1px solid var(--site-header-border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.9));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--site-header-shadow);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: var(--site-header-max-width);
  min-height: var(--site-header-height);
  margin: 0 auto;
  padding: 14px var(--site-header-side-gap);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--site-header-text);
  text-decoration: none;
}

.site-header__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, #1d4ed8, #7c3aed);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 14px 24px rgba(59, 130, 246, 0.24);
}

.site-header__brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.site-header__brand-title {
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.1;
}

.site-header__brand-subtitle {
  color: var(--site-header-muted);
  font-size: 0.76rem;
  line-height: 1.1;
}

.site-header__links {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.site-header__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--site-header-muted);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.site-header__link:hover,
.site-header__link:focus-visible {
  background: rgba(148, 163, 184, 0.12);
  color: var(--site-header-text);
  transform: translateY(-1px);
}

.site-header__link[aria-current="page"] {
  background: var(--site-header-accent-soft);
  color: var(--site-header-accent);
}

body.has-site-header .nav {
  top: var(--site-header-height);
  z-index: 1000;
}

body.has-site-header[data-site-section="home"] .hero {
  padding-top: calc(var(--site-header-height) + 80px + var(--section-padding));
}

@media (max-width: 900px) {
  :root {
    --site-header-height: 98px;
  }

  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 14px;
  }

  .site-header__brand {
    width: 100%;
  }

  .site-header__links {
    width: 100%;
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  :root {
    --site-header-height: 116px;
    --site-header-side-gap: 16px;
  }

  .site-header__brand-subtitle {
    display: none;
  }

  .site-header__links {
    gap: 8px;
  }

  .site-header__link {
    flex: 1 1 calc(33.333% - 8px);
    min-width: 96px;
    padding-inline: 12px;
  }
}