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.element { max-width: fit-content; margin-inline: auto; }
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<div> <p>The dashed border shows the container's bounds, while the blue border highlights our centered element.</p> <h2> Flexbox: A modern approach </h2> <p>Flexbox is probably the most versatile solution we have. Want to center something both horizontally and vertically? Here's all you need:<br> </p> <pre class="brush:php;toolbar:false">.container { display: flex; justify-content: center; align-items: center; }
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<div> <p>The patterned background helps visualize the container's space, while the green border shows our centered element.</p> <h2> Grid: When You Need More Power </h2> <p>CSS Grid offers another approach, and it's surprisingly concise:<br> </p> <pre class="brush:php;toolbar:false">.container { display: grid; place-content: center; }
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.container { display: grid; place-content: center; } .element { grid-row: 1; grid-column: 1; }
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<div> <p>This example demonstrates several key concepts:</p>
- All elements share the same grid cell (1/1)
- Z-index controls the stacking order
- The main content stays perfectly centered
The dashed border shows the grid container bounds, while the layered cards and decorative elements show how multiple items can be stacked and positioned within the same grid cell.
Positioning for UI Elements
When you're building modals, tooltips, or floating UI elements, absolute/fixed positioning might be your best bet:
.modal { position: fixed; inset: 0; width: fit-content; height: fit-content; margin: auto; }
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<div> <p>The semi-transparent backdrop helps focus attention on the modal, while the teal border defines the modal boundaries.</p> <h2> Text Centering: It's not what you think </h2> <p>Remember that centering text is its own thing. You can't use Flexbox or Grid to center individual characters - you need text-align:<br> </p> <pre class="brush:php;toolbar:false">.text-container { text-align: center; }
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