body {
  font-family: Arial, sans-serif;
  background: #f7f7f7;
  display: flex;
  justify-content: center;
  padding: 50px 0;
}

.container {
  background: white;
  padding: 25px;
  border-radius: 12px;
  width: 95%;
  max-width: 600px;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

h1 {
  text-align: center;
  color: #333;
}

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

input, select, button {
  padding: 10px;
  font-size: 16px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  background-color: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}

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

li {
  background: #f1f1f1;
  margin-bottom: 10px;
  padding: 12px;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.delete-btn {
  background: red;
  color: white;
  border: none;
  cursor: pointer;
  border-radius: 5px;
  padding: 5px 10px;
  margin-left: 5px;
}

.high { background-color: #ffcccc; }
.medium { background-color: #fff0b3; }
.low { background-color: #ccffcc; }

.progress-container {
  margin-bottom: 15px;
  font-weight: bold;
}

.ai-tip {
  margin-top: 15px;
  background: #e7f3ff;
  padding: 10px;
  border-radius: 8px;
  color: #0b3d91;
  font-style: italic;
}