body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  width: 90%;
  max-width: 600px;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: #6200ea;
}

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

#todo-input {
  flex: 1;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

button {
  padding: 10px 20px;
  background: #6200ea;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background: #3700b3;
}

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

li {
  padding: 10px;
  background: #f9f9f9;
  margin-bottom: 8px;
  border-radius: 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

li button {
  background: #d32f2f;
}

li button:hover {
  background: #b71c1c;
}

@media (max-width: 600px) {
  .container {
    width: 95%;
    padding: 10px;
  }

  #todo-input {
    font-size: 14px;
  }

  button {
    padding: 8px 16px;
  }
}