.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--stone-200);
  background: rgba(253, 248, 244, 0.96);
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-brand {
  text-decoration: none;
  font-weight: 700;
  color: var(--warm-900);
  font-size: 1.1rem;
}

.header-auth {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 2rem;
  gap: 0.65rem;
}

.header-auth .user-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.92rem;
  color: var(--stone-700);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--stone-300);
  background: var(--stone-100);
}

#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

.page-header {
  margin-bottom: 1rem;
}

.page-header h2 {
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  line-height: 1.2;
  color: var(--stone-900);
}

.page-subtitle {
  margin-top: 0.4rem;
  color: var(--stone-600);
  font-size: 0.94rem;
}

.guard-view,
.empty-state,
.loading-state,
.error-state,
.photo-compare-placeholder {
  border: 1px solid var(--stone-200);
  border-radius: var(--radius-lg);
  background: white;
  padding: 1.35rem;
}

.guard-view {
  max-width: 500px;
  margin: 3rem auto;
  text-align: center;
}

.guard-view p {
  margin-top: 0.5rem;
  color: var(--stone-600);
}

.guard-view .btn-google-signin {
  margin-top: 1rem;
}

.landing-page {
  max-width: 700px;
  margin: 3rem auto;
  text-align: center;
}

.landing-page p {
  margin-top: 0.7rem;
  color: var(--stone-600);
}

.landing-page .btn-google-signin {
  margin-top: 1.2rem;
}

.lists-toolbar,
.list-detail-toolbar {
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.lists-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.9rem;
}

.list-summary-card {
  display: block;
  background: white;
  border: 1px solid var(--stone-200);
  border-radius: var(--radius-md);
  padding: 0.95rem;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.list-summary-card:hover {
  border-color: var(--warm-300);
}

.list-summary-meta {
  margin-top: 0.6rem;
  display: grid;
  gap: 0.3rem;
  color: var(--stone-600);
  font-size: 0.84rem;
}

.list-detail-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.status-strip {
  margin-top: 0.8rem;
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.freshness-row {
  margin-top: 0.5rem;
  color: var(--stone-600);
  font-size: 0.83rem;
}

.freshness-row.error {
  color: var(--red-800);
}

.list-tabs {
  margin-top: 1rem;
  border-bottom: 1px solid var(--stone-200);
  display: flex;
  gap: 0.35rem;
}

.list-tabs [role="tab"] {
  border: 0;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  padding: 0.5rem 0.75rem;
  font-size: 0.88rem;
  background: transparent;
  color: var(--stone-700);
}

.list-tabs [role="tab"][aria-selected="true"] {
  background: white;
  border: 1px solid var(--stone-200);
  border-bottom-color: white;
  color: var(--stone-900);
}

.tab-panel {
  padding-top: 1rem;
}

@media (max-width: 700px) {
  #app {
    padding: 1rem 0.75rem 2rem;
  }

  .header-inner {
    padding: 0.75rem;
  }

  .list-detail-top {
    flex-direction: column;
  }

  .lists-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 380px) {
  .header-auth .user-chip span {
    display: none;
  }

  .page-header h2 {
    font-size: 1.25rem;
  }
}