.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-primary);
  height: var(--header-height);
  transition: height var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  height: var(--header-height-scrolled);
  box-shadow: var(--shadow);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-logo:hover { color: var(--color-white); opacity: 0.9; }

.site-logo__mark {
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.site-header .site-logo__wordmark {
  height: 56px;
  width: auto;
  display: block;
  flex-shrink: 0;
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 6px 12px;
}

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

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__item { position: relative; }

.site-nav__link {
  display: block;
  padding: 0.5rem 0.875rem;
  color: rgba(255,255,255,0.9);
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color var(--transition);
}

.site-nav__link:hover,
.site-nav__item.is-open > .site-nav__link { color: var(--color-accent); }

.site-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  list-style: none;
  margin: 0;
}

.site-nav__item:hover .site-nav__dropdown,
.site-nav__item.is-open .site-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-nav__dropdown a {
  display: block;
  padding: 0.625rem 1.25rem;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
}

.site-nav__dropdown a:hover {
  background: var(--color-surface);
  color: var(--color-accent);
}

.site-nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-white);
}

.site-nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  margin: 5px 0;
  transition: transform var(--transition), opacity var(--transition);
}

.site-header__cta { margin-left: 1rem; }

.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 4rem 0 0;
}

.site-footer a { color: rgba(255,255,255,0.85); }
.site-footer a:hover { color: var(--color-accent); }

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 3rem;
}

.site-footer__brand p { margin-top: 1rem; max-width: 280px; }

.site-footer__heading {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links li { margin-bottom: 0.5rem; }

.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
}

.page-offset { padding-top: var(--header-height); }

@media (max-width: 1024px) {
  .site-nav__toggle { display: block; }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-primary);
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition);
  }

  .site-header.is-nav-open .site-nav { transform: translateX(0); }
  .site-header.is-nav-open .site-nav__toggle span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .site-header.is-nav-open .site-nav__toggle span:nth-child(2) { opacity: 0; }
  .site-header.is-nav-open .site-nav__toggle span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .site-nav__list { flex-direction: column; align-items: stretch; }

  .site-nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: rgba(0,0,0,0.2);
    display: none;
    margin-top: 0.25rem;
    border-radius: var(--radius);
  }

  .site-nav__item.is-open .site-nav__dropdown { display: block; }

  .site-nav__dropdown a { color: rgba(255,255,255,0.85); }
  .site-nav__dropdown a:hover { background: rgba(0,0,0,0.15); color: var(--color-accent); }

  .site-header__cta { margin: 1rem 0 0; }
  .site-header__cta .btn { width: 100%; text-align: center; }

  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}