* {
  margin: 0px;
  padding: 0px;
  box-sizing: border-box;
}
body {
  width: 100vw;
  height: 100vh;
  background-image: url("./images/sky.jpg");
  background-size: cover;
  justify-content: center;
  align-items: center;
  display: flex;
}
h2 {
  margin: 20px 10px 30px 20px;
  text-align: center;
}
h2 img {
  width: 50px;
  height: 50px;
}

.main-board-todo {
  background: rgb(255, 255, 255);
  position: relative;
  width: 500px;
  border-radius: 10px;
  overflow: hidden;
}

.header {
  background-color: #edeef0;
  margin: 10px;
  border-radius: 100px;
  display: flex;
  justify-content: space-between;
  overflow: hidden;
  overflow-y: auto;
  padding-left: 20px;
}
.header input {
  display: inline-block;
  font-size: 24px;
  border: none;
  border-radius: 100px;
  padding: 10px;
}
.header #text {
  flex: 1;
  outline: none;
  border: none;
  background-color: transparent;
}

.header #add {
  background-color: rgb(247, 118, 58);
  cursor: pointer;
  padding: 8px 50px;
}

ul li {
  position: relative;
  list-style: none;
  font-size: 17px;
  padding: 12px 8px 12px 45px;
  user-select: none;
  cursor: pointer;
  margin: 0px 10px 0px 10px;
  border-radius: 20px;
  transition: 200ms;
}

ul li::before {
  content: "";
  position: absolute;
  height: 28px;
  width: 28px;
  border-radius: 50%;
  background-image: url("./images/unchecked.png");
  background-size: cover;
  background-position: center;
  top: 8px;
  left: 8px;
}
ul li.checked {
  color: #555;
  text-decoration: line-through;
}

ul li.checked::before {
  background-image: url(images/checked.png);
}

ul li span {
  position: absolute;
  right: 0px;
  top: 3px;
  width: 40px;
  height: 40px;
  font-size: 22px;
  color: #555;
  line-height: 40px;
  text-align: center;
  border-radius: 50%;
}

ul li span:hover {
  background-color: #dadada;
  transition: 200ms;
}