.skip-link {
  position: absolute;
  top: 0;
  left: 1rem;
  transform: translateY(-140%);
  padding: 0.7rem 0.9rem;
  background: var(--foreground);
  color: var(--background);
  border-radius: 0.5rem;
  font-size: var(--text-sm);
  line-height: 1;
  text-decoration: none;
  z-index: 100;
  transition: transform 0.18s ease;
}

.skip-link:focus {
  transform: translateY(0.75rem);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--background) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--foreground) 10%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 44px;
}

.brand-mark {
  width: 2.25rem;
  height: 2.25rem;
  color: var(--primary);
  flex: 0 0 auto;
}

.brand-text strong {
  display: block;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
}

.brand-text span {
  display: block;
  font-size: var(--text-xs);
  color: var(--muted);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-link {
  font-size: var(--text-sm);
  color: var(--muted);
  text-decoration: none;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--foreground);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 44px;
  padding: 0.8rem 1.05rem;
  border-radius: 0.6rem;
  border: 1px solid transparent;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  font-size: var(--text-sm);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--primary);
  color: var(--inverse);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--surface);
  color: var(--foreground);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--surface-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--foreground);
  border-color: color-mix(in srgb, var(--foreground) 12%, transparent);
}

.btn-icon {
  width: 44px;
  min-width: 44px;
  padding: 0;
}

.btn-login svg {
  display: none;
  flex: 0 0 auto;
}

.btn-login-label {
  display: inline;
}

.site-footer {
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: var(--text-sm);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.2rem;
  border-top: 1px solid color-mix(in srgb, var(--foreground) 10%, transparent);
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: inherit;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--foreground);
}

@media (max-width: 960px) {
  .header-inner {
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .header-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 0.5rem 0.75rem;
    padding: 0.5rem 0;
  }

  .brand {
    min-height: 38px;
    gap: 0.65rem;
  }

  .brand-mark {
    width: 2rem;
    height: 2rem;
  }

  .brand-text strong {
    font-size: var(--text-xs);
    line-height: 1.1;
  }

  .brand-text span {
    display: none;
  }

  .main-nav {
    grid-column: 1 / -1;
    order: 3;
    width: 100%;
    gap: 0.75rem;
    row-gap: 0.35rem;
    padding-top: 0.2rem;
  }

  .nav-link {
    font-size: var(--text-xs);
    line-height: 1.2;
  }

  .header-actions {
    gap: 0.35rem;
    flex-wrap: nowrap;
    justify-content: flex-end;
  }

  .header-actions .btn {
    min-height: 38px;
    padding: 0.55rem 0.7rem;
    font-size: var(--text-xs);
  }

  .btn-icon {
    width: 38px;
    min-width: 38px;
  }

  .btn-login {
    min-width: 38px;
    width: 38px;
    padding: 0;
  }

  .btn-login svg {
    display: block;
    width: 18px;
    height: 18px;
  }

  .btn-login-label {
    display: none;
  }