<section class="nn-twl" aria-label="Tailwind neon glow config demo">
  <div class="stage">

    <div class="btn-row">
      <button class="twl-btn cyan" type="button">◈ Neon Cyan</button>
      <button class="twl-btn pink" type="button">◈ Neon Pink</button>
      <button class="twl-btn amber" type="button">◈ Neon Amber</button>
      <button class="twl-btn green" type="button">◈ Neon Green</button>
    </div>

    <div class="card-row">
      <div class="twl-card cyan">
        <div class="card-title">Cyan Card</div>
        <div class="card-body">
          Use <code>shadow-neon-cyan</code> for border glow and
          <code>text-shadow-neon-cyan</code> for text.
        </div>
        <div class="card-rule"></div>
        <div class="card-code">class="shadow-neon-cyan<br/>text-shadow-neon-cyan"</div>
      </div>
      <div class="twl-card pink">
        <div class="card-title">Pink Card</div>
        <div class="card-body">
          Use <code>shadow-neon-pink</code> for border glow and
          <code>text-shadow-neon-pink</code> for text.
        </div>
        <div class="card-rule"></div>
        <div class="card-code">class="shadow-neon-pink<br/>text-shadow-neon-pink"</div>
      </div>
      <div class="twl-card violet">
        <div class="card-title">Violet Card</div>
        <div class="card-body">
          Use <code>shadow-neon-violet</code> for border glow and
          <code>text-shadow-neon-violet</code>.
        </div>
        <div class="card-rule"></div>
        <div class="card-code">class="shadow-neon-violet<br/>text-shadow-neon-violet"</div>
      </div>
    </div>

    <div class="config-block" role="region" aria-label="Tailwind config snippet">
      <div class="config-top"></div>
      <div class="config-label">tailwind.config.js — theme.extend</div>
<pre class="config-pre"><span class="tw-mute">theme: {</span>
  <span class="tw-mute">extend: {</span>
    <span class="tw-key">boxShadow</span><span class="tw-mute">: {</span>
      <span class="tw-name">'neon-cyan'</span><span class="tw-mute">:  </span><span class="tw-val">'0 0 5px #fff, 0 0 12px #00dbde, 0 0 28px #00dbde...'</span><span class="tw-mute">,</span>
      <span class="tw-name">'neon-pink'</span><span class="tw-mute">:  </span><span class="tw-val">'0 0 5px #fff, 0 0 12px #fc00ff, 0 0 28px #fc00ff...'</span><span class="tw-mute">,</span>
      <span class="tw-name">'neon-amber'</span><span class="tw-mute">: </span><span class="tw-val">'0 0 5px #fff, 0 0 12px #ffb300, 0 0 28px #ffb300...'</span><span class="tw-mute">,</span>
      <span class="tw-name">'neon-green'</span><span class="tw-mute">: </span><span class="tw-val">'0 0 5px #fff, 0 0 12px #00ff94, 0 0 28px #00ff94...'</span><span class="tw-mute">,</span>
    <span class="tw-mute">},</span>
    <span class="tw-key">textShadow</span><span class="tw-mute">: {</span>
      <span class="tw-name">'neon-cyan'</span><span class="tw-mute">:  </span><span class="tw-val">'0 0 4px #fff, 0 0 10px #00dbde, 0 0 22px #00dbde...'</span><span class="tw-mute">,</span>
      <span class="tw-name">'neon-pink'</span><span class="tw-mute">:  </span><span class="tw-val">'0 0 4px #fff, 0 0 10px #fc00ff, 0 0 22px #fc00ff...'</span><span class="tw-mute">,</span>
    <span class="tw-mute">}</span>
  <span class="tw-mute">}</span>
<span class="tw-mute">}</span></pre>
      <div class="config-bottom"></div>
    </div>

  </div>
</section>

/* ─── 09 Tailwind Neon Config — theme.extend showcase ──────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Fira+Code:wght@400;500&display=swap');

.nn-twl {
  position: relative;
  width: 100%;
  min-height: 780px;
  background: #06060f;
  font-family: 'Inter', sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
  overflow: hidden;
  box-sizing: border-box;
}

.nn-twl *,
.nn-twl *::before,
.nn-twl *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Cyan grid backdrop */
.nn-twl::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,219,222,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,219,222,0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

.nn-twl .stage {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 760px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* Buttons */
.nn-twl .btn-row { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.nn-twl .twl-btn {
  padding: 12px 28px;
  background: transparent;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid;
  cursor: pointer;
  transition: all 0.3s ease;
}
.nn-twl .twl-btn.cyan {
  color: #00dbde;
  border-color: #00dbde;
  text-shadow: 0 0 4px #fff, 0 0 10px #00dbde, 0 0 22px #00dbde, 0 0 44px rgba(0,219,222,0.7);
  box-shadow: 0 0 5px #fff, 0 0 12px #00dbde, 0 0 28px #00dbde, 0 0 56px rgba(0,219,222,0.5);
}
.nn-twl .twl-btn.cyan:hover { background: rgba(0,219,222,0.1); box-shadow: 0 0 28px #00dbde, 0 0 70px rgba(0,219,222,0.4); }
.nn-twl .twl-btn.pink {
  color: #fc00ff;
  border-color: #fc00ff;
  text-shadow: 0 0 4px #fff, 0 0 10px #fc00ff, 0 0 22px #fc00ff, 0 0 44px rgba(252,0,255,0.7);
  box-shadow: 0 0 5px #fff, 0 0 12px #fc00ff, 0 0 28px #fc00ff, 0 0 56px rgba(252,0,255,0.5);
}
.nn-twl .twl-btn.pink:hover { background: rgba(252,0,255,0.1); box-shadow: 0 0 28px #fc00ff, 0 0 70px rgba(252,0,255,0.4); }
.nn-twl .twl-btn.amber {
  color: #ffb300;
  border-color: #ffb300;
  text-shadow: 0 0 4px #fff, 0 0 10px #ffb300, 0 0 22px #ffb300, 0 0 44px rgba(255,179,0,0.7);
  box-shadow: 0 0 5px #fff, 0 0 12px #ffb300, 0 0 28px #ffb300, 0 0 56px rgba(255,179,0,0.5);
}
.nn-twl .twl-btn.amber:hover { background: rgba(255,179,0,0.1); }
.nn-twl .twl-btn.green {
  color: #00ff94;
  border-color: #00ff94;
  text-shadow: 0 0 4px #fff, 0 0 10px #00ff94, 0 0 22px #00ff94, 0 0 44px rgba(0,255,148,0.7);
  box-shadow: 0 0 5px #fff, 0 0 12px #00ff94, 0 0 28px #00ff94, 0 0 56px rgba(0,255,148,0.5);
}
.nn-twl .twl-btn.green:hover { background: rgba(0,255,148,0.1); }

/* Cards */
.nn-twl .card-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.nn-twl .twl-card {
  background: #0a0a1e;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid;
}
.nn-twl .twl-card.cyan   { border-color: rgba(0,219,222,0.2); box-shadow: 0 0 5px #fff, 0 0 12px #00dbde, 0 0 28px #00dbde, 0 0 56px rgba(0,219,222,0.5), inset 0 0 14px rgba(0,219,222,0.25); }
.nn-twl .twl-card.pink   { border-color: rgba(252,0,255,0.2); box-shadow: 0 0 5px #fff, 0 0 12px #fc00ff, 0 0 28px #fc00ff, 0 0 56px rgba(252,0,255,0.5), inset 0 0 14px rgba(252,0,255,0.25); }
.nn-twl .twl-card.violet { border-color: rgba(139,0,255,0.2); box-shadow: 0 0 5px #fff, 0 0 12px #8b00ff, 0 0 28px #8b00ff, 0 0 56px rgba(139,0,255,0.5); }
.nn-twl .twl-card .card-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.nn-twl .twl-card.cyan   .card-title { color: #00dbde; text-shadow: 0 0 4px #fff, 0 0 10px #00dbde, 0 0 22px #00dbde; }
.nn-twl .twl-card.pink   .card-title { color: #fc00ff; text-shadow: 0 0 4px #fff, 0 0 10px #fc00ff, 0 0 22px #fc00ff; }
.nn-twl .twl-card.violet .card-title { color: #8b00ff; text-shadow: 0 0 4px #fff, 0 0 10px #8b00ff, 0 0 22px #8b00ff; }
.nn-twl .twl-card .card-body {
  font-size: 12px;
  line-height: 1.55;
  color: rgba(255,255,255,0.5);
}
.nn-twl .twl-card .card-body code {
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 11px;
}
.nn-twl .twl-card.cyan   .card-body code { color: #00dbde; }
.nn-twl .twl-card.pink   .card-body code { color: #fc00ff; }
.nn-twl .twl-card.violet .card-body code { color: #8b00ff; }
.nn-twl .twl-card .card-rule { height: 1px; }
.nn-twl .twl-card.cyan   .card-rule { background: linear-gradient(90deg, transparent, rgba(0,219,222,0.4), transparent); }
.nn-twl .twl-card.pink   .card-rule { background: linear-gradient(90deg, transparent, rgba(252,0,255,0.4), transparent); }
.nn-twl .twl-card.violet .card-rule { background: linear-gradient(90deg, transparent, rgba(139,0,255,0.4), transparent); }
.nn-twl .twl-card .card-code {
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 10px;
  line-height: 1.6;
  color: rgba(255,255,255,0.25);
}

/* Config block */
.nn-twl .config-block {
  position: relative;
  background: #080818;
  border: 1px solid rgba(255,255,255,0.07);
  padding: 24px;
  overflow: hidden;
}
.nn-twl .config-top,
.nn-twl .config-bottom {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
}
.nn-twl .config-top    { top: 0;    background: linear-gradient(90deg, transparent, rgba(0,219,222,0.5), transparent); }
.nn-twl .config-bottom { bottom: 0; background: linear-gradient(90deg, transparent, rgba(252,0,255,0.5), transparent); }
.nn-twl .config-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(0,219,222,0.6);
  margin-bottom: 16px;
}
.nn-twl .config-pre {
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 11px;
  line-height: 1.8;
  color: rgba(255,255,255,0.7);
  overflow-x: auto;
  white-space: pre;
}
.nn-twl .tw-mute { color: rgba(255,255,255,0.3); }
.nn-twl .tw-key  { color: rgba(0,219,222,0.8); }
.nn-twl .tw-name { color: rgba(252,0,255,0.8); }
.nn-twl .tw-val  { color: rgba(255,179,0,0.7); }

@media (max-width: 720px) {
  .nn-twl .card-row { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .nn-twl .twl-btn { transition: none !important; }
}