Open late
Cocktails and vinyl until 2 am, Thursday to Saturday.
Neon Sign Card Hover
A dark card with an unlit neon tube for a border and title. On hover the tube stutters on like a real sign, then holds a steady glow. One keyframe set drives both the tube and the lettering.
Also known as: neon card hover css, neon glow border card, flickering neon effect.
HTML
<article class="hfx-card-neon-sign"> <h3>Open late</h3> <p>Cocktails and vinyl until 2 am, Thursday to Saturday.</p> </article>
CSS
.hfx-card-neon-sign {
--c: var(--hfx-color, #3b82f6);
font-size: var(--hfx-size, 16px);
--hfx-card-neon-sign-lit: color-mix(in srgb, var(--c) 35%, #fff);
position: relative;
box-sizing: border-box;
width: 14em;
padding: 1.2em 1.3em 1.3em;
border: 1px solid color-mix(in srgb, var(--c) 30%, transparent);
border-radius: 0.9em;
background: #0a0a10;
color: color-mix(in srgb, #fff 55%, transparent);
font-family: system-ui, sans-serif;
}
.hfx-card-neon-sign::before {
content: "";
position: absolute;
inset: -1px;
border: 0.12em solid var(--hfx-card-neon-sign-lit);
border-radius: inherit;
box-shadow: 0 0 0.4em var(--c), 0 0 1.2em color-mix(in srgb, var(--c) 60%, transparent), inset 0 0 0.5em color-mix(in srgb, var(--c) 45%, transparent);
opacity: 0;
pointer-events: none;
}
.hfx-card-neon-sign h3 {
margin: 0 0 0.3em;
font-size: 1.35em;
font-weight: 700;
letter-spacing: 0.04em;
color: color-mix(in srgb, var(--c) 45%, transparent);
}
.hfx-card-neon-sign p {
margin: 0;
font-size: 0.8em;
line-height: 1.45;
}
.hfx-card-neon-sign:hover::before { animation: hfx-card-neon-sign-flicker 0.9s linear both; }
.hfx-card-neon-sign:hover h3 {
color: var(--hfx-card-neon-sign-lit);
text-shadow: 0 0 0.2em var(--c), 0 0 0.6em var(--c);
animation: hfx-card-neon-sign-flicker 0.9s linear both;
}
@keyframes hfx-card-neon-sign-flicker {
0% { opacity: 0.2; }
8% { opacity: 1; }
12% { opacity: 0.25; }
22% { opacity: 1; }
26% { opacity: 0.4; }
30% { opacity: 0.3; }
38% { opacity: 1; }
44% { opacity: 0.6; }
52%, 100% { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
.hfx-card-neon-sign, .hfx-card-neon-sign *, .hfx-card-neon-sign::before, .hfx-card-neon-sign::after, .hfx-card-neon-sign *::before, .hfx-card-neon-sign *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--hfx-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--hfx-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.