:root {
  --nav-bg: oklch(99% 0.002 250);
  --nav-surface: oklch(100% 0 0);
  --nav-fg: oklch(28% 0.02 250);
  --nav-muted: oklch(52% 0.02 250);
  --nav-border: oklch(90% 0.008 250);
  --nav-accent: oklch(72% 0.18 55);
  --nav-primary: oklch(22% 0.06 250);
  --nav-primary-mid: oklch(32% 0.1 250);
  --nav-font-display: "Playfair Display", Georgia, serif;
  --nav-font-body: "Source Sans 3", system-ui, sans-serif;
  --nav-font-mono: "DM Mono", ui-monospace, monospace;
  --nav-shadow-soft: 0 4px 24px oklch(22% 0.06 250 / 0.08);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: oklch(100% 0 0 / 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nav-border);
  transition: box-shadow 0.25s;
}

.site-header.scrolled {
  box-shadow: var(--nav-shadow-soft);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1.25rem;
  max-width: 1200px;
  margin-inline: auto;
}

.site-header .logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--nav-primary);
}

.site-header .logo img {
  height: 3rem;
  width: auto;
  max-height: 3rem;
  max-width: 3rem;
  object-fit: contain;
  object-position: left;
  flex-shrink: 0;
}

.site-header .logo-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.site-header .logo-text strong {
  font-family: var(--nav-font-display);
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.site-header .logo-text > span {
  font-family: var(--nav-font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nav-muted);
}

.site-header .nav-links {
  display: none;
  list-style: none;
  gap: 1.75rem;
  align-items: center;
}

.site-header .nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--nav-fg);
  text-decoration: none;
}

.site-header .nav-links a:hover {
  color: var(--nav-primary-mid);
}

.site-header .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.65rem 1.35rem;
  font-family: var(--nav-font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.site-header .btn-primary {
  background: var(--nav-accent);
  color: var(--nav-primary);
}

.site-header .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px oklch(72% 0.18 55 / 0.35);
  color: var(--nav-primary);
}

.site-header .nav-toggle {
  display: flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--nav-border);
  cursor: pointer;
  color: var(--nav-primary);
}

.site-header .mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 1.25rem 1.25rem;
  border-top: 1px solid var(--nav-border);
  background: var(--nav-surface);
}

.site-header .mobile-menu.open {
  display: flex;
}

.site-header .mobile-menu a {
  padding: 0.75rem 0;
  font-weight: 500;
  color: var(--nav-fg);
  text-decoration: none;
  border-bottom: 1px solid var(--nav-border);
}

@media (min-width: 900px) {
  .site-header .nav-links {
    display: flex;
  }

  .site-header .nav-toggle {
    display: none;
  }
}

@media (max-width: 899px) {
  .site-header .logo-text {
    display: none;
  }
}