.app-shell-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--surface, #17191b) 88%, transparent);
  border-bottom: 1px solid var(--line, #1e2124);
}

.ash-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0.75rem 1.2rem;
  gap: 1rem;
}

.ash-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink, #ebedee);
  flex-shrink: 0;
}

.ash-mark {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.5rem;
  object-fit: contain;
}

.ash-mark-fallback {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.5rem;
  background: linear-gradient(135deg, #15516f, #2e7fa7);
  display: block;
  flex-shrink: 0;
}

.ash-label {
  font-family: 'Sora', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.ash-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.ash-link {
  color: var(--muted, #8f9398);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.35rem 0.6rem;
  border-radius: 0.4rem;
  transition: color 0.15s, background 0.15s;
}

.ash-link:hover {
  color: var(--ink, #ebedee);
  background: rgba(255, 255, 255, 0.06);
}

.ash-auth {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-height: 2rem;
}

.ash-auth .auth-email {
  font-size: 0.84rem;
  color: var(--muted, #8f9398);
  max-width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 600px) {
  .ash-inner {
    padding: 0.6rem 0.8rem;
  }
  .ash-links {
    display: none;
  }
  .ash-label {
    font-size: 0.95rem;
  }
}