<form class="csb-glitch" role="search">
  <label class="csb-sr" for="csb-glitch-i">Search</label>
  <input id="csb-glitch-i" type="search" name="q" placeholder="$ search //" />
</form>

.csb-glitch {
  position: relative; display: inline-block;
}
.csb-glitch input {
  width: 240px; padding: 11px 14px;
  background: #0c0c12;
  border: 1px solid rgba(46,204,138,0.4);
  border-radius: 4px;
  color: #2ecc8a; font: 500 13px/1 'Courier New', monospace;
  letter-spacing: 0.06em;
  outline: none;
  transition: border-color 0.2s;
}
.csb-glitch input::placeholder { color: rgba(46,204,138,0.6); }
.csb-glitch input:focus {
  border-color: #ff6c8a;
  animation: csb-glitch-shake 0.4s steps(2);
}
@keyframes csb-glitch-shake {
  0%,100% { transform: translateX(0); }
  20%      { transform: translateX(-2px); text-shadow: 2px 0 #ff6c8a, -2px 0 #06b6d4; }
  40%      { transform: translateX(2px);  text-shadow: -2px 0 #ff6c8a, 2px 0 #06b6d4; }
  60%      { transform: translateX(-1px); text-shadow: 1px 0 #ff6c8a, -1px 0 #06b6d4; }
  80%      { transform: translateX(1px);  text-shadow: 0 0 transparent; }
}

.csb-sr {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  .csb-glitch,
  .csb-glitch * {
    animation: none !important;
  }
}