* {
  margin: 0;
  padding: 0;
  font-family: 'Poppins';
  box-sizing: border-box;
}

.container {
  width: 100%;
  min-height: 100vh;
  background: linear-gradient(190deg, rgb(255, 255, 153), purple);
  padding: 10px;
}

@keyframes shadow-move {
  0% {
    box-shadow: 0px 2px 0px 4px rgb(0, 0, 0);
  }

  25% {
    box-shadow: 2px 0px 1px 3px rgb(255, 255, 0);
  }

  50% {
    box-shadow: 0px 2px 2px 2px rgb(111, 255, 0);
  }

  75% {
    box-shadow: 2px 0px 3px 1px rgb(0, 157, 255);
  }

  100% {
    box-shadow: 0px 2px 4px 0px rgb(255, 0, 0);
  }
}

.todo-app {
  max-width: 540px;
  background: white;
  margin: 100px auto 20px;
  width: 100%;
  box-shadow: 0px 0px 2px 1px rgb(21, 21, 21);
  padding: 40px 30px 70px;
  border-radius: 10px;
  position: relative;
  animation: shadow-move 4s 2;
}

.todo-app p {
  position: absolute;
  font-size: 12px;
  right: 8px;
  top: 5px;
  color: rgb(159, 158, 158);
}

.todo-app h2 {
  color: rgb(56, 4, 54);
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.todo-app h2 img {
  width: 23px;
  margin-left: 10px;
}

.row {
  display: flex;
  align-items: center;
  border-radius: 30px;
  padding-left: 20px;
  justify-content: space-between;
  background: rgb(228, 228, 221);
  margin-bottom: 25px;
}

input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-weight: 14px;
}

button {
  border: none;
  outline: none;
  padding: 16px 50px;
  background: rgb(255, 79, 79);
  font-size: 16px;
  cursor: pointer;
  border-radius: 40px;
  font-weight: bold;
}

ul li {
  list-style: none;
  padding: 12px 8px 12px 50px;
  font-size: 17px;
  cursor: pointer;
  user-select: none;
  position: relative;
}

ul li::before {
  height: 23px;
  width: 23px;
  content: ' ';
  position: absolute;
  border-radius: 50%;
  background-image: url("resources/unchecked.png");
  background-size: cover;
  background-position: center;
  top: 14px;
  left: 8px;
}

ul li.checked {
  color: rgb(33, 96, 4);
  text-decoration: line-through;
}

ul li.checked::before {
  background-image: url("resources/checked.png");
  background-size: cover;
  height: 18px;
  width: 18px;
  top: 15px;
  left: 10px;
}

ul li span {
  position: absolute;
  right: 0;
  top: 5px;
  width: 40px;
  height: 40px;
  font-size: 22px;
  color: red;
  line-height: 40px;
}

ul li span:hover {
  background: white;
}

/* Responsive Styles */
@media (max-width: 600px) {
  .todo-app {
    padding: 20px 15px 50px;
    margin: 50px auto 10px;
  }

  .row {
    flex-direction: column;
    padding-left: 10px;
  }

  input {
    margin-bottom: 20px;
    margin-top: 10px;
  }

  button {
    margin-bottom: 10px;
    width: 90%;
  }

  ul li {
    font-size: 14px;
    padding: 8px 5px 8px 40px;
  }

  ul li::before {
    height: 18px;
    width: 18px;
    top: 10px;
  }

  ul li.checked::before {
    height: 15px;
    width: 15px;
    top: 10px;
  }

  ul li span {
    width: 30px;
    height: 30px;
    font-size: 18px;
    line-height: 30px;
  }
}