* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  padding: 20px;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

#controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 20px;
}

input,
button {
  padding: 8px 10px;
  font-size: 14px;
}

button {
  cursor: pointer;
}

#todos {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250, 1fr));
  gap: 10px;
}

.todo {
  background: #ffffff;
  padding: 10px 15px;
  border-radius: 6px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.todo.done {
  border-left: 4px solid #4caf50;
}

.todo.pending {
  border-left: 4px solid #f44336;
}

.todo-title {
  font-weight: bold;
  margin-bottom: 4px;
}

.todo-status {
  font-size: 12px;
  color: #555;
}