body {
  border: solid 1px;
  margin: 0;
  display: flex;
  justify-content: center;
  min-height: 100vh;
  background-color: greenyellow;
}
.video-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover; /* fill screen like background-size: cover */
  z-index: -1; /* put behind everything */
}
.form {
  position: absolute;
  top: 30%;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  width: 400px;
  background-color: yellow;
  border-radius: 10px;
}

.input {
  width: 100%;
  box-sizing: border-box;
  padding: 20px;
  border-radius: 10px 10px 0 0;
  border: none;
  font-size: 20px;
  font-family: cursive;
}
.input::placeholder {
  color: lightgray;
}

.list {
  padding: 0;
  margin: 0;
}
.list li {
  list-style-type: none;
  padding: 20px;
  font-family: cursive;
  border-top: dotted 2px gray;
  border-color: darkgray;
  position: relative;
}

.list li .fa-trash {
  color: red;
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
}
.list li .fa-square-check {
  color: green;
  position: absolute;
  right: 40px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
}
.list li.checked {
  color: darkgray;
  text-decoration: line-through;
}
.list li.checked .fa-square-check {
  color: darkgray;
}