body {
  background: linear-gradient(to right, #6dd5fa, #2980b9);
  font-family: 'Segoe UI', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  width: 90%;
  max-width: 400px;
  text-align: center;
}

h1 {
  margin-bottom: 20px;
  color: #333;
}

p {
  margin-bottom: 20px;
  color #333;
  text-align: center;
}

.input-group {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
}

input[type="text"] {
  width: 70%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  padding: 10px 15px;
  background-color: #2980b9;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #1c5980;
}

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

li {
  padding: 10px;
  margin: 5px 0;
  background-color: #f4f4f4;
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

li.completed {
  text-decoration: line-through;
  color: #888;
}

.delete-btn {
  background-color: #e74c3c;
  border: none;
  color: white;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
}