design.css

body {
  font-family: "Arial", sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f0f0f0;
}

.container {
  max-width: 400px;
  margin: 20px auto;
  padding: 20px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transform: translateY(0);
  opacity: 1;
  transition: transform 0.3s, opacity 0.3s;
}

.container.hide {
  transform: translateY(20px);
  opacity: 0;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

input[type="text"] {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

button {
  padding: 10px 20px;
  background-color: #3498db;
  border: none;
  color: white;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #2980b9;
}

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

li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  border-bottom: 1px solid #ccc;
  transition: background-color 0.3s;
}

li:hover {
  background-color: #f5f5f5;
}

button.delete {
  background-color: #e74c3c;
  transition: background-color 0.3s;
}

button.delete:hover {
  background-color: #c0392b;
}

/* Responsive adjustments for smaller screens */
@media screen and (max-width: 480px) {
  .container {
    max-width: 100%;
    border-radius: 0;
    box-shadow: none;
    padding: 10px;
  }

  input[type="text"] {
    padding: 8px;
  }

  button {
    padding: 8px 16px;
  }
}

/* ...previous styles... */

.buttons {
  display: flex;
  gap: 10px;
}

.done-button {
  padding: 6px 12px;
  background-color: #27ae60;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.done-button:hover {
  background-color: #219e52;
}

.task-item.done {
  background-color: #e0ffe0;
  text-decoration: line-through;
}
/* ...previous styles... */

.date-time-button {
  padding: 6px 12px;
  background-color: #f39c12;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.date-time-button:hover {
  background-color: #d68e0d;
}