@layer layout {
  .site-shell { width: min(calc(100% - (2 * var(--z-gutter))), var(--z-container)); margin-inline: auto; }
  .site-main { min-height: 55vh; padding-block: var(--z-section); }
  .entry-header { max-width: 850px; margin-bottom: 2rem; }
  .entry-title { font-size: clamp(2rem, 5vw, 4rem); }
}