.app-frame {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  width: 100%;
  padding: 14px clamp(20px, 5vw, 64px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
}

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

.brand-mark {
  color: var(--accent);
  filter: drop-shadow(0 0 12px rgba(79, 140, 255, 0.35));
}

.brand-text {
  display: flex;
  align-items: baseline;
  gap: 8px;
  line-height: 1;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.03em;
}

.brand-sub {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.brand-sub::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--border-strong);
  vertical-align: middle;
  transform: translateY(-1px);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-soft);
  border-radius: var(--radius-full);
  transition:
    color var(--transition),
    background var(--transition);
}

.nav-link:hover {
  color: var(--text);
  background: var(--bg-hover);
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-user {
  font-size: 13px;
  color: var(--text-muted);
  margin-right: 6px;
}

.nav-user strong {
  color: var(--text);
  font-weight: 600;
}

.site-main {
  flex: 1;
  width: 100%;
}

.site-footer {
  margin-top: auto;
  padding: 48px clamp(20px, 5vw, 64px) 40px;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: end;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

.footer-muted {
  margin: 0;
  color: var(--text-muted);
  font-size: 13px;
  max-width: 36ch;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  gap: 16px;
  font-size: 13px;
}

.footer-links a {
  color: var(--text-soft);
}

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

.landing-wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: clamp(20px, 5vw, 64px);
  padding-right: clamp(20px, 5vw, 64px);
}

@media (max-width: 768px) {
  .header-inner {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 12px;
  }

  .nav-links {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

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