html {
  font-size: min(max(12px, 3vw), 16px);
}

html, body {
  height: 100%;
}

body {
  background-color: snow;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%23acb4c3' fill-opacity='0.2'%3E%3Cpath opacity='.5' d='M96 95h4v1h-4v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9zm-1 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9z'/%3E%3Cpath d='M6 5V0H5v5H0v1h5v94h1V6h94V5H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  color: var(--color-black);
  --color-black: #333;
  --color-primary: #0a5;
  --color-white: white;

  font-family: "Indie Flower", cursive;
  margin: 0;
}

main {
  align-items: center;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: center;
  margin: auto;
}

h1 {
  font-size: 5rem;
  margin-bottom: 0;
  margin-top: 0;
  text-decoration: underline;
  z-index: 10;
}

ul {
  background-color: var(--color-white);
  box-shadow: 0 0 14rem 6rem var(--color-white);
  font-size: 3rem;
  list-style-type: none;
  margin: 1.6rem 0 2rem;
  padding-left: 1rem;
}

.item {
  cursor: pointer;
  display: flex;
  padding-left: 2.4rem;
  position: relative;
  transition: opacity .3s;
  user-select: none;
}

.item:hover {
  text-decoration: line-through;
}

.item.done {
  color: var(--color-primary);
  opacity: .4;
}

.item.done:hover {
  opacity: 1;
  text-decoration: inherit;
}

.item .title {
  display: inline-block;
}

.item.done .title {
  transform: skewX(-20deg);
}

.item.done:hover .title {
  transform: skewX(0);
  transition: transform .3s;
}

.item input {
  height: 0;
  margin: 0;
  width: 0;
}

.item input::before {
  content: "☐";
  cursor: pointer;
  font-size: 2rem;
  left: 0;
  position: absolute;
  top: .7rem;
}

.item input:checked::before {
  color: var(--color-primary);
  content: "🗹";
}