<form class="csb-hero" role="search">
  <label class="csb-sr" for="csb-hero-i">Search</label>
  <svg viewBox="0 0 24 24" aria-hidden="true">
    <circle cx="11" cy="11" r="7" />
    <path d="m20 20-3.5-3.5" />
  </svg>
  <input id="csb-hero-i" type="search" name="q" placeholder="What are you looking for?" />
  <button type="submit">Search</button>
</form>

.csb-hero {
  position: relative; display: inline-flex; align-items: center;
  padding: 5px 5px 5px 14px; gap: 10px;
  background: #1a1a28;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  isolation: isolate;
  max-width: 100%;
}
.csb-hero::before {
  content: ''; position: absolute; inset: -20px; z-index: -1;
  background: radial-gradient(ellipse at center, rgba(124,108,255,0.4), transparent 70%);
  filter: blur(20px); opacity: 0.5;
  transition: opacity 0.3s;
}
.csb-hero:focus-within::before { opacity: 1; }
.csb-hero svg { width: 16px; height: 16px; flex-shrink: 0; fill: none; stroke: #a78bfa; stroke-width: 2; stroke-linecap: round; }
.csb-hero input {
  width: 180px; padding: 10px 0;
  border: 0; outline: none; background: transparent;
  color: #f0eeff; font: 500 15px/1 system-ui, sans-serif;
  min-width: 0;
}
.csb-hero input::placeholder { color: #b8b6d4; }
.csb-hero button {
  padding: 9px 16px; flex-shrink: 0;
  border: 0; cursor: pointer;
  background: linear-gradient(135deg, #7c6cff, #ff6c8a);
  color: #fff; font: 600 13px/1 system-ui, sans-serif;
  border-radius: 10px;
}

.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;
}