/* Общие стили */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f5f5;
}

main#app {
  max-width: 600px;
  margin: 20px auto;
  padding: 20px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

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

input[type="text"] {
  flex: 1;
  padding: 10px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  padding: 10px 15px;
  border: none;
  background-color: #007BFF;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}

/* Список задач */
section#task-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.task {
  padding: 10px;
  background: #e9e9e9;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.task.completed {
  text-decoration: line-through;
  opacity: 0.6;
}

/* Фильтры и сортировка */
.filters, .sort {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
  flex-wrap: wrap;
}

@media (max-width: 500px) {
  form {
    flex-direction: column;
  }
  
  button {
    width: 100%;
  }
}