CSS Coding Questions

Center a child both horizontally and vertically.

.stage {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

Create a responsive card grid.

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
}

Make a header stick to the top.

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
}

Use fluid font sizing with clamp.

.hero-title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  line-height: 1.15;
}

Preserve 16:9 for media.

.media {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
}

Style a custom checkbox with accent-color.

input[type="checkbox"] {
  accent-color: #da0037;
  width: 1.1rem;
  height: 1.1rem;
}

Apply dark theme styles with prefers-color-scheme.

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #111;
    --text: #f5f5f5;
  }
}

Truncate a single line with ellipsis.

.truncate {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

Change card layout with container queries.

.card-wrap {
  container-type: inline-size;
}
@container (min-width: 28rem) {
  .card {
    display: flex;
    gap: 1rem;
  }
}

Add accessible focus styles.

:focus-visible {
  outline: 3px solid #da0037;
  outline-offset: 2px;
}

Define brand tokens with custom properties.

:root {
  --primary: #da0037;
  --surface: #f5f5f5;
  --text: #171717;
}
body {
  background: var(--surface);
  color: var(--text);
}

Create a shimmer-like skeleton block without animation libraries.

.skeleton {
  background: #e5e5e5;
  border-radius: 0.5rem;
  min-height: 1rem;
}

Use logical spacing for RTL-friendly layout.

.panel {
  margin-inline: auto;
  padding-block: 1.5rem;
  padding-inline: 1rem;
}

Build a horizontal snap gallery.

.gallery {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}
.gallery > * {
  scroll-snap-align: start;
  flex: 0 0 80%;
}

Hide chrome and expand content for print.

@media print {
  .site-header,
  .site-footer {
    display: none;
  }
  main {
    width: 100%;
  }
}