body {
  font-family: Arial, sans-serif;
  padding: 1rem;
  background-color: #f4f4f4;
}

.container {
  max-width: 500px;
  margin: auto;
  background: white;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input[type="text"],
input[type="date"],
button {
  width: 100%;
  padding: 0.6rem;
  margin: 0.3rem 0;
  font-size: 1rem;
}

label {
  display: block;
  margin: 0.5rem 0;
}

.filters button {
  padding: 0.5rem;
  margin-right: 0.5rem;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  border: none;
  background: #ddd;
  border-radius: 5px;
}

.filters button:hover {
  background: #ccc;
}

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

li {
  background: #f9f9f9;
  margin: 0.5rem 0;
  padding: 0.6rem;
  border-radius: 5px;
  display: flex;
  flex-direction: column;
}

li span {
  flex: 1;
  margin-bottom: 0.3rem;
}

li.completed span {
  text-decoration: line-through;
  color: gray;
}

li button {
  margin-top: 0.3rem;
  font-size: 0.85rem;
}

@media (min-width: 480px) {
  li {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  li button {
    margin-left: 0.5rem;
    margin-top: 0;
  }
}