<label class="tg-hap">
  <input class="tg-hap-input" type="checkbox" checked>
  <span class="tg-hap-btn" aria-hidden="true">
    <span class="tg-hap-ring"></span>
    <svg class="tg-hap-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
      <path d="M6 8a6 6 0 0 1 12 0c0 7 3 9 3 9H3s3-2 3-9"/>
      <path d="M10.3 21a1.94 1.94 0 0 0 3.4 0"/>
    </svg>
  </span>
  <span class="tg-hap-label">Notify</span>
</label>

.tg-hap {
  --tg-hap-rim: #14141e;
  --tg-hap-wire: #1e1e2e;
  --tg-hap-edge: #020205;
  --tg-hap-accent: #39d353;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  cursor: pointer;
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  font-size: 14px;
  color: #1a1a2e;
  user-select: none;
}
.tg-hap-input {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}
.tg-hap-btn {
  position: relative;
  display: inline-flex;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--tg-hap-rim);
  border: 1px solid var(--tg-hap-wire);
  align-items: center;
  justify-content: center;
  box-shadow:
    0 6px 0 var(--tg-hap-edge),
    0 8px 16px rgba(0,0,0,0.5);
  transition:
    box-shadow 0.1s ease,
    transform 0.1s ease,
    background 0.3s ease,
    border-color 0.3s ease;
}
.tg-hap-icon {
  width: 22px;
  height: 22px;
  color: #3a3a52;
  filter: grayscale(1) brightness(0.6);
  position: relative;
  z-index: 1;
  transition: color 0.3s ease, transform 0.3s ease, filter 0.3s ease;
}
.tg-hap-ring {
  position: absolute;
  inset: -4px;
  border-radius: 20px;
  border: 2px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
/* Press effect — clicking the label sinks the button.
   Using the label's :active so the whole hit-area drives the press. */
.tg-hap:active .tg-hap-btn {
  box-shadow:
    0 2px 0 var(--tg-hap-edge),
    0 3px 8px rgba(0,0,0,0.5);
  transform: translateY(3px);
}
.tg-hap-input:checked ~ .tg-hap-btn {
  background: #0f1a0f;
  border-color: rgba(57,211,83,0.3);
  box-shadow:
    0 6px 0 var(--tg-hap-edge),
    0 8px 16px rgba(0,0,0,0.5),
    0 0 20px rgba(57,211,83,0.15);
}
.tg-hap-input:checked ~ .tg-hap-btn .tg-hap-icon {
  color: var(--tg-hap-accent);
  filter: none;
  transform: scale(1.15);
}
.tg-hap-input:checked ~ .tg-hap-btn .tg-hap-ring {
  border-color: var(--tg-hap-accent);
  box-shadow: 0 0 12px rgba(57,211,83,0.3);
}
.tg-hap-input:focus-visible ~ .tg-hap-btn {
  outline: 2px solid var(--tg-hap-accent);
  outline-offset: 6px;
}
@media (prefers-reduced-motion: reduce) {
  .tg-hap-btn,
  .tg-hap-icon,
  .tg-hap-ring { transition: none; }
}