.section-shell {
  width: min(var(--max-width), calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--color-page-bg) 88%, transparent);
  backdrop-filter: blur(18px);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.site-header.is-scrolled {
  border-color: var(--color-border);
  box-shadow: 0 0.75rem 2rem rgba(31, 15, 19, 0.08);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--max-width), calc(100% - 2rem));
  min-height: 5.25rem;
  margin-inline: auto;
  gap: 1rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.brand-logo {
  width: 3.25rem;
  height: 3.25rem;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow-card);
}

.brand-text {
  display: grid;
  line-height: 1;
}

.brand-text .brand-script {
  color: var(--color-heading);
  font-size: 2rem;
}

.brand-subtitle {
  color: var(--color-muted);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a, .theme-toggle {
  border-radius: 999px;
  padding: 0.7rem 0.9rem;
  color: var(--color-text);
  font-size: 0.86rem;
  font-weight: 700;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"],
.theme-toggle:hover {
  background: var(--color-accent-soft);
  color: var(--color-heading);
}

.nav-cta {
  background: var(--color-heading);
  color: var(--color-page-bg) !important;
}

.theme-toggle, .nav-toggle {
  border: 0;
  background: transparent;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 999px;
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.nav-toggle-line {
  display: block;
  width: 1.25rem;
  height: 2px;
  margin: 0.28rem auto;
  border-radius: 999px;
  background: var(--color-heading);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
  padding-block: var(--section-padding);
}

.section-copy {
  position: sticky;
  top: 7rem;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  padding-block: 3rem;
}

.footer-grid h2 {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  letter-spacing: 0;
}

.footer-grid a {
  display: block;
  width: fit-content;
  margin-bottom: 0.45rem;
  color: var(--color-muted);
  font-weight: 700;
}

.footer-grid a:hover { color: var(--color-accent-strong); }

.footer-social-link,
.footer-icon-link {
  display: flex !important;
  align-items: center;
  gap: 0.45rem;
  width: fit-content;
}

.footer-social-icon,
.footer-contact-icon {
  width: 1.1rem;
  height: 1.1rem;
  flex: 0 0 auto;
  fill: currentColor;
}

.footer-brand {
  margin-bottom: 0.25rem;
  color: var(--color-heading);
  font-size: 2.2rem;
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }

  .nav-links {
    position: fixed;
    inset: 5.25rem 1rem auto 1rem;
    display: grid;
    gap: 0.35rem;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-large);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-0.75rem);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  body.nav-open .nav-links {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-links a, .theme-toggle {
    width: 100%;
    text-align: left;
  }

  .split-section, .footer-grid {
    grid-template-columns: 1fr;
  }

  .section-copy { position: static; }
}