.auth-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  background: radial-gradient(circle at top left, rgba(11, 110, 79, 0.18), transparent 35%), linear-gradient(135deg, #f3f6fb 0%, #e8eef7 100%);
}
.auth-brand, .auth-wall {
  padding: 48px;
  display: flex;
  align-items: center;
}
.auth-brand {
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  align-items: flex-start;
}
.app-shell {
  min-height: 100vh;
  display: flex;
  align-items: stretch;
}
.sidebar {
  width: 280px;
  min-width: 280px;
  background: linear-gradient(180deg, var(--sidebar) 0%, #182741 100%);
  color: var(--sidebar-text);
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.shell-main {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.shell-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 28px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.shell-content {
  padding: 28px;
  display: grid;
  gap: 24px;
  min-width: 0;
}
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}
.model-header, .page-hero, .catalog-section, .module-placeholder, .auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.page-hero, .catalog-section, .module-placeholder, .model-header {
  padding: 24px;
}
.model-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}
@media (max-width: 960px) {
  .auth-layout {
    grid-template-columns: 1fr;
  }

  .app-shell {
    flex-direction: column;
  }

  .sidebar {
    width: auto;
    min-width: 0;
  }
}