Design for AIDark accent bar
Dark accent bar: a CSS card. Copy the rules, or the prompt that rebuilds it.
Tutorial
Container queries in practice
Stop guessing viewport widths. Size to the parent.
CSS
.card-008 {
display: flex;
width: 480px;
background: #111827;
border-radius: 12px;
overflow: hidden;
font-family: system-ui,sans-serif;
color: #f9fafb;
border-left: 4px solid #22d3ee
}
.card-008__img {
flex: 0 0 140px;
background: linear-gradient(160deg,#164e63,#22d3ee)
}
.card-008__body {
padding: 18px 22px
}
.card-008__kicker {
font-size: 11px;
font-weight: 700;
letter-spacing: .1em;
text-transform: uppercase;
color: #22d3ee
}
.card-008 h3 {
margin: 6px 0 6px;
font-size: 18px
}
.card-008 p {
margin: 0;
font-size: 14px;
line-height: 1.5;
color: #9ca3af
}
.card-008:hover {
border-left-color: #a5f3fc
}
HTML
<article class="card-008">
<div class="card-008__img"></div>
<div class="card-008__body">
<span class="card-008__kicker">Tutorial</span>
<h3>Container queries in practice</h3>
<p>Stop guessing viewport widths. Size to the parent.</p>
</div>
</article>Prompt
Build a 480px horizontal card on dark background #111827 with 12px radius and a 4px left border in cyan #22d3ee. Left image column fixed 140px wide with 160deg gradient #164e63 to #22d3ee. Body padding 18px 22px: an uppercase 11px kicker "Tutorial" in #22d3ee with .1em tracking, an 18px white title, 14px description in #9ca3af. On hover the left border brightens to #a5f3fc.