/* 页面背景颜色 */
body {
    background-color: #f8f9fa;
}

/* 容器样式 */
.container {
    max-width: 600px;
    margin: 50px auto;
    padding: 30px;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

/* 标题样式 */
h1 {
    color: #007bff;
    margin-bottom: 30px;
}

h2 {
    color: #6c757d;
    margin-bottom: 20px;
}

/* 表单元素样式 */
.form-label {
    font-weight: bold;
}

.form-control {
    margin-bottom: 20px;
}

/* 按钮样式 */
.btn-primary {
    width: 100%;
}

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

#todo-list li {
    margin-bottom: 10px;
}

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

#todo-list input[type="checkbox"]:checked + label {
    text-decoration: line-through;
    color: #888;
}

#copyInfo {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #28a745;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    display: none;
    z-index: 1000;
}