<div class="flex__container">
  <div class="flex__item">:)</div>

  <input type="checkbox" name="margin" id="marginTop" data-custom-property="margin-top" />
  <label for="marginTop" class="top"><span class="ui"></span>margin-top: auto</label>

  <input type="checkbox" name="margin" id="marginRight" data-custom-property="margin-right" />
  <label for="marginRight" class="right"><span class="ui"></span>margin-right: auto</label>

  <input type="checkbox" name="margin" id="marginBottom" data-custom-property="margin-bottom" />
  <label for="marginBottom" class="bottom"><span class="ui"></span>margin-right: auto</label>

  <input type="checkbox" name="margin" id="marginLeft" data-custom-property="margin-left" />
  <label for="marginLeft" class="left"><span class="ui"></span>margin-left: auto</label>

</div>

@import url("https://fonts.googleapis.com/css?family=Gochi+Hand");

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  width: 100vw;
  min-height: 100vh;
  margin: 0;
  background-color: #291642;
  font-family: "Gochi Hand", sans-serif;
  font-size: 100%;
  letter-spacing: 0.1rem;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  background: linear-gradient(to right, #44ea76 0%, #39fad7 80%, #39fad7 100%)
      no-repeat,
    url("https://lh4.googleusercontent.com/-3eBjuQpOGFw/U47yh_-OycI/AAAAAAAAI2U/uaU5pK49N1w/s1600/normal.jpg")
      no-repeat fixed;
  background-size: cover;
  background-blend-mode: hue;
}

.flex__container {
  inline-size: 50vw;
  block-size: 50vh;

  display: flex;

  border-radius: 5px;
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 4vh;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.4);
  transition: box-shadow 0.3s ease;

  background-image: linear-gradient(
    0deg,
    rgba(255, 255, 255, 0.5),
    rgba(255, 255, 255, 0.5)
  );
  backdrop-filter: blur(3px);

  position: relative;
}

.flex__item {
  font-size: 3rem;
  padding: 4vh;
  background: #7b44bc;
  border-radius: 4px;
}

[type="checkbox"]:not(:checked),
[type="checkbox"]:checked {
  position: absolute;
  display: none;
}

[type="checkbox"]:not(:checked) + label,
[type="checkbox"]:checked + label {
  padding-left: 70px;
  cursor: pointer;
}

[type="checkbox"]:not(:checked) + label:before,
[type="checkbox"]:checked + label:before,
[type="checkbox"]:not(:checked) + label:after,
[type="checkbox"]:checked + label:after {
  content: "";
  position: absolute;
}

[type="checkbox"]:not(:checked) + label:before,
[type="checkbox"]:checked + label:before {
  width: 65px;
  height: 30px;
  background: #795548;
  border-radius: 15px;
  left: 0;
  top: -7px;
  transition: all 0.2s ease;
}

[type="checkbox"]:not(:checked) + label:after,
[type="checkbox"]:checked + label:after {
  width: 10px;
  height: 10px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  top: 3px;
  left: 10px;
  transition: all 0.2s ease;
}

/* on checked */
[type="checkbox"]:checked + label:before {
  background: #0f4fe6;
}

[type="checkbox"]:checked + label:after {
  background: #ffffff;
  top: 3px;
  left: 45px;
}

[type="checkbox"]:checked + label .ui,
[type="checkbox"]:not(:checked) + label .ui:before,
[type="checkbox"]:checked + label .ui:after {
  position: absolute;
  left: 6px;
  width: 65px;
  border-radius: 15px;
  font-size: 14px;
  font-weight: bold;
  line-height: 22px;
  transition: all 0.2s ease;
  top: -2px;
}

[type="checkbox"]:not(:checked) + label .ui:before {
  content: "no";
  left: 32px;
  color: rgba(255, 255, 255, 0.7);
}

[type="checkbox"]:checked + label .ui:after {
  content: "yes";
  color: #ffffff;
}

[type="checkbox"]:focus + label:before {
  box-sizing: border-box;
  margin-top: -1px;
}

label {
  position: absolute;
  white-space: nowrap;
}

.top {
  left: 50%;
  transform: translate(-50%, 0);
  bottom: calc(100% + 15px);
}

.bottom {
  left: 50%;
  transform: translate(-50%, 0);
  top: calc(100% + 15px);
}

.left {
  top: 50%;
  transform: translate(0, -50%) rotate(-90deg);
  right: calc(100% - 85px);
}

.right {
  top: 50%;
  transform: translate(0, -50%) rotate(90deg);
  left: calc(100% - 85px);
}

const checkboxes = document.querySelectorAll('input[type="checkbox"]');
const flexItem = document.querySelector(".flex__item");

checkboxes.forEach((checkbox) =>
  checkbox.addEventListener("change", (e) => {
    const property = e.target.id;
    if (e.target.checked) {
      document.documentElement.style.setProperty(`--${e.target.id}`, `auto`);

      if (e.target.id === "marginTop") {
        flexItem.style.marginTop = `var(--${e.target.id})`;
      }

      if (e.target.id === "marginRight") {
        flexItem.style.marginRight = `var(--${e.target.id})`;
      }

      if (e.target.id === "marginBottom") {
        flexItem.style.marginBottom = `var(--${e.target.id})`;
      }

      if (e.target.id === "marginLeft") {
        flexItem.style.marginLeft = `var(--${e.target.id})`;
      }
    } else {
      if (e.target.id === "marginTop") {
        flexItem.style.marginTop = `unset`;
      }

      if (e.target.id === "marginRight") {
        flexItem.style.marginRight = `unset`;
      }

      if (e.target.id === "marginBottom") {
        flexItem.style.marginBottom = `unset`;
      }

      if (e.target.id === "marginLeft") {
        flexItem.style.marginLeft = `unset`;
      }
    }
  })
);