/* 基础重置 */
body {
    background-color: #f0f0f0; /* 仿操作系统背景色 */
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

/* 记事本窗口框架 */
.notepad-window {
    width: 600px;
    height: 450px;
    background-color: #fff;
    border: 1px solid #c0c0c0; /* 窗口边框 */
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2); /* 简单阴影，更像窗口 */
    display: flex;
    flex-direction: column;
    overflow: hidden; /* 防止内容超出 */
}

/* 标题栏 */
.title-bar {
    background-color: #e0e0e0; /* 默认不活动状态 */
    border-bottom: 1px solid #c0c0c0;
    padding: 3px 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: #333;
    user-select: none; /* 防止选中标题文本 */
}

/* 标题栏激活状态 (如果需要JS来控制) */
.title-bar.active {
    background-color: #0078d7; /* 仿 Win10 蓝色 */
    color: #fff;
}

.title-text {
    flex-grow: 1;
    text-align: left;
    margin-left: 5px;
}

/* 窗口控制按钮 */
.window-controls {
    display: flex;
}

.control-btn {
    background: none;
    border: none;
    padding: 0 10px;
    font-size: 16px;
    line-height: 1;
    height: 25px;
    cursor: pointer;
    color: #333;
    transition: background-color 0.1s;
}

.control-btn:hover {
    background-color: #c0c0c0;
}

/* 关闭按钮的特殊样式 */
.control-btn.close {
    color: #333;
}

.control-btn.close:hover {
    background-color: #e81123;
    color: #fff;
}

/* 菜单栏 */
.menu-bar {
    display: flex;
    padding: 0 2px;
    border-bottom: 1px solid #c0c0c0;
    background-color: #f9f9f9;
    position: relative; /* 用于定位下拉菜单 */
}

.menu-item {
    padding: 4px 8px;
    font-size: 13px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.1s;
}

.menu-item:hover {
    background-color: #cce8ff; /* 仿 Windows 菜单高亮 */
    color: #000;
}

/* 菜单下拉框 */
.dropdown-menu {
    position: absolute;
    top: 100%; /* 定位到菜单栏下方 */
    left: 0; /* 初始定位 */
    background-color: #fff;
    border: 1px solid #c0c0c0;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1);
    z-index: 100; /* 确保在最上层 */
    min-width: 150px;
    display: none; /* 初始隐藏 */
}

.dropdown-item {
    padding: 4px 15px 4px 10px;
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap; /* 防止换行 */
}

.dropdown-item:hover {
    background-color: #cce8ff;
    color: #000;
}

.dropdown-separator {
    height: 1px;
    background-color: #c0c0c0;
    margin: 3px 0;
}

/* 文本编辑区域 */
.text-editor {
    flex-grow: 1; /* 占据剩余空间 */
    border: none;
    padding: 5px;
    font-family: 'Consolas', 'Courier New', monospace; /* 仿记事本默认字体 */
    font-size: 13px;
    line-height: 1.5;
    resize: none; /* 禁用用户拖拽调整大小 */
    outline: none; /* 移除点击时的蓝色边框 */
}

/* 状态栏 */
.status-bar {
    height: 20px;
    border-top: 1px solid #c0c0c0;
    background-color: #f0f0f0;
    font-size: 12px;
    padding: 0 5px;
    line-height: 20px;
    text-align: right;
    color: #555;
}