body {
  font-family: "Segoe UI", Tahoma;
  max-width: 600px;
  margin: 0 auto;
  padding: 30px;
  background: linear-gradient(to right, #e0f7fa, #fce4ec);
}

h1 {
  text-align: center;
  color: #2c3e50;
  margin-bottom: 30px;
}

form {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

input[type="text"] {
  flex: 1;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ddd;
  font-size: 16px;
}

button {
  padding: 10px 15px;
  background-color: #2e7d32;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 15px;
}

button:hover {
  background-color: #1b5e20;
}

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

.todo-item {
  background-color: white;
  padding: 12px 16px;
  margin-bottom: 10px;
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.todo-text {
  flex: 1;
  text-align: left;
}

.todo-item.completed .todo-text {
  text-decoration: line-through;
  color: #aaa;
}

.todo-controls button {
  margin-left: 6px;
  background-color: #ef5350;
  border: none;
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 12px;
  cursor: pointer;
  color: white;
}

.todo-controls button:hover {
  background-color: #c62828;
}