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

.container {
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
}

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

form {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
}

input[type="text"] {
  flex-grow: 1;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 5px;
  margin-right: 10px;
  transition: all 0.3s;
}

input[type="text"]:focus {
  border-color: #333;
}

select {
  margin-right: 10px;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  background: #333;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #555;
}

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

li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px;
  margin-bottom: 10px;
  background: #f9f9f9;
  border: 1px solid #ccc;
  border-radius: 5px;
  transition: all 0.3s;
}

li.completed {
  text-decoration: line-through;
  background: #e0e0e0;
}

li .checkbox {
  margin-right: 10px;
}

li .delete {
  background: red;
  color: white;
  border: none;
  border-radius: 5px;
  padding: 5px 10px;
  cursor: pointer;
  transition: background 0.3s;
}

li .delete:hover {
  background: darkred;
}

/* Animations */
@keyframes slideIn {
  from {
      opacity: 0;
      transform: translateY(-20px);
  }
  to {
      opacity: 1;
      transform: translateY(0);
  }
}

li {
  animation: slideIn 0.5s ease-in-out;
}

@keyframes fadeOut {
  from {
      opacity: 1;
      transform: scale(1);
  }
  to {
      opacity: 0;
      transform: scale(0.9);
  }
}

li.removing {
  animation: fadeOut 0.3s forwards;
}

/* Priority Styles */
.priority-high {
  border-left: 5px solid red;
}

.priority-medium {
  border-left: 5px solid orange;
}

.priority-low {
  border-left: 5px solid green;
}