.container {
    width: 80%;
    margin: 20px auto;
    font-family: sans-serif;
}

.input-section {
    margin-bottom: 15px;
}

.input-section label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.input-section select, .input-section input[type="number"] {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

#calculate-button {
    padding: 10px 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

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

.results-section {
    margin-top: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #f9f9f9;
}

.results-section .result-item {
    margin: 10px 0;
}

.highlight {
    color: red;
    font-weight: bold;
}

.footer-link {
    margin-top: 30px;
    text-align: center;
    padding: 15px;
    background-color: #f0f0f0;
    border-radius: 4px;
}

.footer-link a {
    color: #007BFF;
    text-decoration: none;
    font-weight: bold;
}

.footer-link a:hover {
    text-decoration: underline;
}

/* Todo List 样式 */
.todo-list {
    margin-top: 30px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #f9f9f9;
}

.todo-list h3 {
    margin-bottom: 10px;
    font-size: 18px;
    color: #333;
}

.todo-list ul {
    list-style-type: none;
    padding: 0;
}

.todo-list li {
    margin: 10px 0;
    display: flex;
    align-items: center;
}

.todo-list input[type="checkbox"] {
    margin-right: 10px;
}

.todo-list label {
    font-size: 16px;
    color: #555;
}