.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--header-height);
  border-bottom: 1px solid color-mix(in srgb, var(--color-border), transparent 22%);
  background: color-mix(in srgb, var(--color-surface), transparent 12%);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
  font-weight: 900;
  font-size: 1.35rem;
}

.brand:hover {
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid color-mix(in srgb, var(--color-border), transparent 35%);
  border-radius: 12px;
  object-fit: contain;
}

.brand-text {
  letter-spacing: 0;
}

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

.site-nav a {
  border-radius: 999px;
  color: var(--color-muted);
  font-weight: 700;
  padding: 0.58rem 0.9rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text);
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.icon-button:hover {
  transform: translateY(-1px);
  background: var(--color-surface-soft);
}

.theme-icon,
.theme-icon::before,
.theme-icon::after {
  display: block;
  border-radius: 50%;
}

.theme-icon {
  width: 1.1rem;
  height: 1.1rem;
  background: var(--color-primary);
  box-shadow: 0 0 0 0.32rem color-mix(in srgb, var(--color-primary), transparent 75%);
}

[data-theme="dark"] .theme-icon {
  background: transparent;
  box-shadow: inset -0.35rem 0 0 var(--color-primary-strong);
}

.menu-toggle {
  display: none;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 1.18rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle span {
  position: relative;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
}

.menu-toggle span::before {
  transform: translateY(-0.42rem);
}

.menu-toggle span::after {
  transform: translateY(0.42rem);
}

.menu-toggle[aria-expanded="true"] span {
  background: transparent;
}

.menu-toggle[aria-expanded="true"] span::before {
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span::after {
  transform: rotate(-45deg);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.15rem;
  font-weight: 800;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.button:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.button-primary {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 12px 28px color-mix(in srgb, var(--color-primary), transparent 70%);
}

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

.eyebrow {
  display: inline-flex;
  margin-bottom: 0.75rem;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: color-mix(in srgb, var(--color-accent), var(--color-text) 25%);
  padding: 0.35rem 0.8rem;
  font-size: 0.9rem;
  font-weight: 800;
}

.feature-card,
.content-card,
.mini-faq-grid article,
.contact-card,
.notice-card,
.legal-card,
.toc-card,
.faq-item,
.cta-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface), transparent 4%);
  box-shadow: var(--shadow-card);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface), transparent 10%);
  padding-block: 2.4rem 1.2rem;
}

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

.footer-brand {
  margin-bottom: 0.8rem;
}

.site-footer nav,
.site-footer address {
  display: grid;
  gap: 0.45rem;
  font-style: normal;
}

.site-footer a {
  color: var(--color-muted);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1.6rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
  color: var(--color-muted);
  font-size: 0.92rem;
  text-align: center;
  width: 100%;
}