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“CSS Grid provides true two-dimensional track layouts. Combining arbitrary grid templates like "grid-cols-[repeat(auto-fit,minmax(280px,1fr))]" creates responsive card matrices that automatically adapt to screen widths without a single media query.”
Build fluid 2D responsive grids without media queries using auto-fit and minmax().
<div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-6">
<div class="col-span-1 lg:col-span-2 p-6 rounded-2xl bg-slate-900 border border-slate-800">
<h3 class="text-xl font-bold text-white">Featured Hero Card (2 Cols)</h3>
</div>
<div class="p-6 rounded-2xl bg-slate-900 border border-slate-800">
<h3 class="text-xl font-bold text-white">Side Metric (1 Col)</h3>
</div>
</div>.grid { display: grid; }
.gap-6 { gap: 1.5rem; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
@media (min-width: 1024px) {
.lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.lg\:col-span-2 { grid-column: span 2 / span 2; }
}Define Grid Container: "grid"
Configure columns: "grid-cols-1 md:grid-cols-2 lg:grid-cols-3" or auto-fit
Set uniform row and column spacing: "gap-6"
Span multiple cells: "col-span-2" or "row-span-2"
Align track items using "place-items-center" or "content-start"
Auto-fit responsive grids eliminate 80% of responsive breakpoint declarations and eliminate layout reflow jitter.