body {
  font-family: sans-serif;
  text-align: center;
  margin-top: 50px;
  transition: background-color 0.5s ease;
}

.container {
  background: white;
  padding: 40px;
  border-radius: 10px;
  display: inline-block;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#counter {
  font-size: 48px;
  margin: 20px 0;
  color: #333;
}

button {
  font-size: 18px;
  padding: 10px 20px;
  margin: 0 10px;
  cursor: pointer;
}

#colorCode {
  margin-top: 20px;
  font-size: 20px;
  font-weight: bold;
}

.input-group {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

input[type="text"] {
  flex: 1;
  padding: 10px;
  font-size: 16px;
}

form {
  display: flex;
  flex-direction: column;
}

input, textarea {
  margin-bottom: 15px;
  padding: 10px;
  font-size: 16px;
}

button {
  padding: 10px 15px;
  font-size: 16px;
  cursor: pointer;
}

ul {
  list-style-type: none;
  padding: 0;
}

li {
  padding: 10px;
  margin-bottom: 8px;
  background: #e3e3e3;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

li.completed {
  text-decoration: line-through;
  color: gray;
}

.remove-btn {
  margin-left: 10px;
  color: red;
  font-weight: bold;
  cursor: pointer;
}