<form class="lf-pin" aria-label="Numeric pin sign in">
  <h2 class="lf-pin-title">Enter PIN</h2>
  <div class="lf-pin-display" aria-live="polite">
    <span class="lf-pin-dot"></span>
    <span class="lf-pin-dot"></span>
    <span class="lf-pin-dot"></span>
    <span class="lf-pin-dot"></span>
  </div>
  <div class="lf-pin-grid" role="group" aria-label="Numeric keypad">
    <button type="button" class="lf-pin-key">1</button>
    <button type="button" class="lf-pin-key">2</button>
    <button type="button" class="lf-pin-key">3</button>
    <button type="button" class="lf-pin-key">4</button>
    <button type="button" class="lf-pin-key">5</button>
    <button type="button" class="lf-pin-key">6</button>
    <button type="button" class="lf-pin-key">7</button>
    <button type="button" class="lf-pin-key">8</button>
    <button type="button" class="lf-pin-key">9</button>
    <button type="button" class="lf-pin-key lf-pin-key-fn">⌫</button>
    <button type="button" class="lf-pin-key">0</button>
    <button type="submit" class="lf-pin-key lf-pin-key-go">→</button>
  </div>
</form>

.lf-pin {
  width: 100%;
  max-width: 240px;
  background: #15151d;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 16px;
  padding: 22px 20px 18px;
  display: grid;
  gap: 14px;
  text-align: center;
}
.lf-pin-title {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: #f0eeff;
  letter-spacing: 0.04em;
}
.lf-pin-display {
  display: flex;
  gap: 12px;
  justify-content: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.lf-pin-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  transition:
    background 0.2s,
    transform 0.2s;
}
.lf-pin-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.lf-pin-key {
  aspect-ratio: 1 / 1;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  color: #f0eeff;
  cursor: pointer;
  transition:
    background 0.12s,
    transform 0.08s,
    border-color 0.15s;
}
.lf-pin-key:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
}
.lf-pin-key:active {
  transform: scale(0.95);
  background: rgba(124, 108, 255, 0.18);
}
.lf-pin-key-fn {
  color: #b8b6d4;
}
.lf-pin-key-go {
  background: linear-gradient(135deg, #7c6cff, #ff6c8a);
  color: white;
  border-color: transparent;
}
.lf-pin-key-go:hover {
  transform: translateY(-1px);
}