🎚️ Toggle Switch

<label class="toggle-ios">
  <input type="checkbox" checked>
  <span class="toggle-ios-slider"></span>
</label>

.toggle-ios {
  display: inline-block;
  cursor: pointer;
}
.toggle-ios input {
  display: none;
}
.toggle-ios-slider {
  width: 52px;
  height: 32px;
  background: #e0e0e0;
  border-radius: 16px;
  position: relative;
  transition: all 0.3s ease;
  display: block;
}
.toggle-ios-slider::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 28px;
  height: 28px;
  background: white;
  border-radius: 50%;
  transition: all 0.3s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}
.toggle-ios input:checked + .toggle-ios-slider {
  background: #34c759;
}
.toggle-ios input:checked + .toggle-ios-slider::after {
  left: 22px;
}

<label class="toggle-icons">
  <input type="checkbox" checked>
  <span class="toggle-icons-slider">
    <span class="toggle-icon-off">🌙</span>
    <span class="toggle-icon-on">☀️</span>
  </span>
</label>

.toggle-icons {
  display: inline-block;
  cursor: pointer;
}
.toggle-icons input {
  display: none;
}
.toggle-icons-slider {
  width: 60px;
  height: 32px;
  background: #1a1a2e;
  border-radius: 16px;
  position: relative;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  padding: 0 6px;
}
.toggle-icons-slider::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 28px;
  height: 28px;
  background: white;
  border-radius: 50%;
  transition: all 0.3s ease;
  z-index: 2;
}
.toggle-icon-off, .toggle-icon-on {
  font-size: 14px;
  z-index: 1;
  transition: opacity 0.3s ease;
}
.toggle-icon-off {
  margin-left: auto;
  opacity: 1;
}
.toggle-icon-on {
  margin-right: auto;
  opacity: 0;
}
.toggle-icons input:checked + .toggle-icons-slider {
  background: #4facfe;
}
.toggle-icons input:checked + .toggle-icons-slider::after {
  left: 30px;
}
.toggle-icons input:checked + .toggle-icons-slider .toggle-icon-on {
  opacity: 1;
}
.toggle-icons input:checked + .toggle-icons-slider .toggle-icon-off {
  opacity: 0;
}

<label class="toggle-label">
  <input type="checkbox" checked>
  <span class="toggle-label-slider"></span>
  <span class="toggle-label-text">Dark Mode</span>
</label>

.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}
.toggle-label input {
  display: none;
}
.toggle-label-slider {
  width: 44px;
  height: 24px;
  background: #d0d0d0;
  border-radius: 12px;
  position: relative;
  transition: all 0.3s ease;
  flex-shrink: 0;
}
.toggle-label-slider::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: all 0.3s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}
.toggle-label input:checked + .toggle-label-slider {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.toggle-label input:checked + .toggle-label-slider::after {
  left: 22px;
}
.toggle-label-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: #1a1a2e;
}