.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(216, 210, 197, 0.8);
  background: rgba(245, 242, 234, 0.9);
  backdrop-filter: blur(16px);
}

.nav {
  min-height: 4.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  border: 1px solid var(--color-text);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.nav-links a,
.profile-links a,
.text-link {
  transition: color 160ms ease;
}

.nav-links a:hover,
.profile-links a:hover,
.text-link:hover {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.5rem;
  height: 2px;
  margin: 0.35rem;
  background: var(--color-text);
}

.button {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: white;
}

.button-secondary {
  border-color: var(--color-text);
}

.button-light {
  border-color: white;
  background: white;
  color: var(--color-surface-dark);
}

.button-outline-light {
  border-color: #758292;
  color: white;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.section-number,
.eyebrow,
.mono-label {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.section-number.light {
  color: #79a0ff;
}

.section-summary {
  max-width: 660px;
  margin-top: 0.8rem;
  color: var(--color-muted);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tag-list span {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.32rem 0.7rem;
  background: rgba(255,255,255,0.4);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--color-border);
  padding-block: 2rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

@media (max-width: 650px) {
  .nav-toggle {
    display: block;
  }

  .nav-links:not(.static-links) {
    position: absolute;
    top: 4.75rem;
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    background: var(--color-surface);
    padding: 1rem;
    box-shadow: var(--shadow-soft);
  }

  .nav-links.open {
    display: flex;
  }

  .static-links {
    gap: 1rem;
    font-size: 0.8rem;
  }

  .footer {
    flex-direction: column;
  }
}

.icon-link,
.icon-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-link img,
.icon-button img {
  width: 1rem;
  height: 1rem;
}

.icon-button img {
  width: 1.1rem;
  height: 1.1rem;
}