Interactive Dark Mode Switch

<!--
MIT License Copyright (c) 2026 Author
Author: Design Engineers
Source: https://21st.dev/r/dark-mode-switch
Revision: main
-->
<!doctype html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Interactive Dark Mode Switch</title><style>html{height:100%;background:#e9e9ef}body{margin:0;min-height:100%;display:grid;place-items:center;padding:24px;box-sizing:border-box;font-family:Arial,sans-serif}#clicks-preview-root{display:flex;align-items:center;justify-content:center;max-width:100%;min-width:0}*{box-sizing:border-box}.switch-container {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  font-family: system-ui, sans-serif;
  color: #e2e8f0;
  font-size: 14px;
  font-weight: 500;
}
.switch-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.switch-slider {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 28px;
  background: #1e2230;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 0.3s, border-color 0.3s;
}
.switch-input:checked + .switch-slider {
  background: #6366f1;
  border-color: #818cf8;
}
.switch-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.switch-input:checked + .switch-slider .switch-knob {
  transform: translateX(24px);
}
@media(max-height:350px){#clicks-preview-root{transform:scale(.8);transform-origin:center}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}</style></head><body><div id="clicks-preview-root"><label class="switch-container">
  <input type="checkbox" class="switch-input" checked="">
  <span class="switch-slider">
    <span class="switch-knob"></span>
  </span>
  <span class="switch-label">Dark Theme Active</span>
</label></div></body></html>