Your AI writes CSS.
We make it good.

/* Typical AI-generated CSS */

.container {
  width: 960px; Hardcoded — breaks every screen
  margin: 0 auto;
}

.sidebar {
  float: left; Float layout — it's not 2009
  width: 250px;
}

.card {
  background: #ffffff; Hardcoded — breaks dark mode
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0,0,0,.1);
  padding: 20px;
}

.card:hover {
  transform: scale(1.05);
  transition: all .3s ease; Animates every property
}

.btn {
  background: linear-gradient(135deg,#667eea,#764ba2);
  color: white !important; Specificity nuclear option
}

/* css.dev-enhanced output */

@layer layout, components; Cascade layers — controlled specificity

@layer layout {
  .page {
    display: grid; CSS Grid — replaces floats
    grid-template-columns: fit-content(250px) 1fr;
    gap: var(--space-l); Design token — not a magic number
  }
}

@layer components {
  .card {
    --_bg: var(--color-surface); Theme-aware — dark mode for free
    --_shadow: var(--shadow-sm);

    background: var(--_bg);
    border-radius: var(--radius-m);
    box-shadow: var(--_shadow);
    padding: var(--space-m);
    transition: box-shadow 200ms ease; Only animates one property

    &:hover {
      --_shadow: var(--shadow-md);
    }
  }
}