// 章节数据
const chaptersData = [
    { id: 1, title: "第一章：洛兰", subtitle: "初入艾尔文防线", desc: "林克初到艾尔文防线，在洛兰森林遭遇哥布林，被阿甘左救下。", status: "已完结", date: "2026-03-20" },
    { id: 2, title: "第二章：洛兰深处", subtitle: "哥布林头目", desc: "林克在阿甘左指导下修炼剑术，深入洛兰深处击败哥布林头目。", status: "已完结", date: "2026-03-20" },
    { id: 3, title: "第三章：幽暗密林", subtitle: "猫妖的伏击", desc: "林克进入格兰之森深处的幽暗密林，遭遇猫妖伏击，历经苦战突破重围。", status: "已完结", date: "2026-03-23" },
    { id: 4, title: "第四章：幽暗密林深处", subtitle: "猫妖王", desc: "林克再次进入幽暗密林深处，遭遇猫妖王，揭开卡赞诅咒的部分真相。", status: "已完结", date: "2026-03-23" },
    { id: 5, title: "第五章：雷鸣废墟", subtitle: "闪电哥布林", desc: "林克挑战雷鸣废墟，遭遇闪电哥布林，经历雷电危机。", status: "已完结", date: "2026-03-23" },
    { id: 6, title: "第六章：格拉卡", subtitle: "牛头王萨乌塔", desc: "林克进入格拉卡，面对强大的牛头王萨乌塔，激战突破自身极限。", status: "已完结", date: "2026-03-23" },
    { id: 7, title: "第七章：烈焰格拉卡", subtitle: "火女彼诺修", desc: "林克挑战火女彼诺修，她的血之诅咒让战斗更加凶险。", status: "已完结", date: "2026-03-23" },
    { id: 8, title: "第八章：冰霜幽暗密林", subtitle: "冰女克拉赫", desc: "为寻找赛丽亚身世线索，林克前往冰霜幽暗密林挑战冰女克拉赫。", status: "已完结", date: "2026-03-23" },
    { id: 9, title: "第九章：转职之路", subtitle: "选择剑魂", desc: "林克前往赫顿玛尔寻找GSD，了解四大转职方向，坚定选择剑魂之道。", status: "已完结", date: "2026-03-24" },
    { id: 10, title: "第十章：暗黑雷鸣废墟", subtitle: "转职试炼", desc: "林克在暗黑雷鸣废墟完成转职试炼，在死亡气息中验证自己的剑道。", status: "已完结", date: "2026-03-24" },
    { id: 11, title: "第十一章：剑魂转职仪式", subtitle: "武器大师", desc: "GSD为林克举行正式转职仪式，详细讲解剑魂武器大师特性。", status: "已完结", date: "2026-03-24" },
    { id: 12, title: "第十二章：西海岸", subtitle: "天空之城入口", desc: "林克前往西海岸了解天空之城背景，GSD决定同行。", status: "已完结", date: "2026-03-24" },
    { id: 13, title: "第十三章：龙人之塔", subtitle: "GSD带队", desc: "GSD亲自带队刷龙人之塔，展现'开挂瞎子'的恐怖实力。", status: "已完结", date: "2026-03-24" },
    { id: 14, title: "第十四章：人偶玄关", subtitle: "觉醒技能", desc: "GSD带队刷人偶玄关，展现阿修罗觉醒技能'暗天波动眼'。", status: "已完结", date: "2026-03-24" },
    { id: 15, title: "第十五章：石巨人塔", subtitle: "独立挑战", desc: "林克和赛丽亚独立挑战石巨人塔，面对黄金巨人普拉塔尼。", status: "已完结", date: "2026-03-24" },
    { id: 16, title: "第十六章：黑暗玄廊", subtitle: "光明与黑暗", desc: "回赫顿玛尔交任务，探索黑暗玄廊，击败天之驱逐者。", status: "已完结", date: "2026-03-24" },
    { id: 17, title: "第十七章：城主宫殿", subtitle: "光之城主", desc: "面对光之城主赛格哈特，净化光之核心，揭晓晨曦的来历。", status: "已完结", date: "2026-03-24" },
    { id: 18, title: "第十八章：番外·悬空城", subtitle: "光之骑士", desc: "探索天空之城最深处，恢复晨曦的光芒，获得光之骑士称号。", status: "已完结", date: "2026-03-24" },
    { id: 19, title: "第十九章：天帷巨兽·神殿外围", subtitle: "使徒的呼唤", desc: "前往天帷巨兽调查GBL教异变，遭遇第二使徒罗特斯的精神控制。", status: "已完结", date: "2026-03-24" },
    { id: 20, title: "第二十章：树精丛林", subtitle: "禁忌实验", desc: "探索GBL教的秘密实验室，发现使徒融合实验，击败树精王。", status: "已完结", date: "2026-03-24" },
    { id: 21, title: "第二十一章：炼狱", subtitle: "火焰试炼", desc: "穿越夜叉栖息的炼狱，击败夜叉王，晨曦恢复七成。", status: "已完结", date: "2026-03-24" },
    { id: 22, title: "第二十二章：西海岸的闲暇", subtitle: "支线与成长", desc: "返回西海岸休整，完成支线任务，与卡坤互动，学会拔刀斩。", status: "已完结", date: "2026-03-24" },
    { id: 23, title: "第二十三章：极昼", subtitle: "天空之巅", desc: "赛丽亚因精神污染离队，林克独自挑战极昼，击败EX多尼尔。", status: "已完结", date: "2026-03-24" },
    { id: 24, title: "第二十四章：第一脊椎", subtitle: "圣光降临", desc: "圣骑士艾伦加入队伍，联手击败巨型黑章鱼，晨曦恢复九成。", status: "已完结", date: "2026-03-24" },
    { id: 25, title: "第二十五章：赫顿玛尔的准备", subtitle: "天界科技", desc: "凯丽制造抗精神干扰手环，为最终决战做准备。", status: "已完结", date: "2026-03-24" },
    { id: 26, title: "第二十六章：第二脊椎", subtitle: "使徒决战", desc: "最终BOSS罗特斯，晨曦完全觉醒，天帷巨兽篇完结。", status: "已完结", date: "2026-03-24" },
    { id: 27, title: "第二十七章：重逢的温柔", subtitle: "赛丽亚线", desc: "林克与赛丽亚久别重逢，两人感情突破，正式确立关系。", status: "已完结", date: "2026-03-24" },
    { id: 28, title: "第二十八章：暗精灵的委托", subtitle: "后宫建立", desc: "莎兰暧昧互动，奥菲利亚表白加入后宫，前往暗黑城新任务。", status: "已完结", date: "2026-03-24" },
    { id: 29, title: "第二十九章：阿法利亚营地", subtitle: "暗黑城篇开启", desc: "抵达阿法利亚营地，接受克伦特委托，后宫修罗场帐篷同眠。", status: "已完结", date: "2026-03-24" },
    { id: 30, title: "第三十章：浅栖之地", subtitle: "寻找摩根", desc: "探索浅栖之地，击败怨恨之摩根，发现夏普伦长老的阴谋。", status: "已完结", date: "2026-03-24" },
    { id: 31, title: "第三十一章：蜘蛛洞穴", subtitle: "猛龙断空斩", desc: "首次实战使用猛龙断空斩，击败BOSS艾克洛索，突破Lv.50。", status: "已完结", date: "2026-03-24" },
    { id: 32, title: "第三十二章：克伦特的委托", subtitle: "四把钥匙", desc: "返回营地汇报，接受克伦特委托，准备前往暗精灵墓地收集四把钥匙。", status: "已完结", date: "2026-03-24" },
    { id: 33, title: "第三十三章：暗精灵墓地·左翼守卫", subtitle: "奥菲利亚线", desc: "击败火焰骷髅将军获得第一把钥匙，奥菲利亚献身，后宫正式确立。", status: "已完结", date: "2026-03-24" },
    { id: 34, title: "第三十四章：暗精灵墓地·剩余三将军", subtitle: "三战连捷", desc: "连续击败冰冻、速度、剧毒三位骷髅将军，集齐四把钥匙。", status: "已完结", date: "2026-03-25" },
    { id: 35, title: "第三十五章：邪龙斯皮兹", subtitle: "远古邪龙", desc: "用四把钥匙解开封印，击败暗精灵墓地最终BOSS邪龙斯皮兹，彻底消灭远古邪恶。", status: "已完结", date: "2026-03-25" },
    { id: 36, title: "第三十六章：莎兰的探望", subtitle: "暧昧之夜", desc: "击败邪龙后回到西海岸，莎兰深夜单独约见林克，两人关系更进一步。", status: "已完结", date: "2026-03-25" },
    { id: 37, title: "第三十七章：暗影迷宫·影子剑士", subtitle: "剑士对决", desc: "进入暗影迷宫挑战影子剑士刹影，林克以光之剑对决暗影之剑，最终净化刹影。", status: "已完结", date: "2026-03-25" },
    { id: 38, title: "第三十八章：熔岩穴·泰坦之怒", subtitle: "熔岩巨人", desc: "挑战熔岩穴深处的熔岩巨人泰坦，林克找到核心弱点，以龙之力彻底消灭怪物。", status: "已完结", date: "2026-03-25" },
    { id: 39, title: "第三十九章：暗黑城入口·无头骑士", subtitle: "幻影剑舞", desc: "林克向GSD学习45级技能幻影剑舞，挑战无头骑士，以新剑技击败强敌。", status: "已完结", date: "2026-03-25" },
    { id: 40, title: "第四十章：万年雪山·冰心少年", subtitle: "冰心查理", desc: "抵达班图族营地，购买新武器细雪之舞，遭遇被冰龙侵蚀的查理，团队配合制服暴走。", status: "已完结", date: "2026-03-25" },
    { id: 41, title: "第四十一章：敏泰的加入", subtitle: "队伍调整", desc: "艾伦退场返回赫顿玛尔，敏泰加入队伍，奥菲利亚转为后勤，新队伍前往利库天井。", status: "已完结", date: "2026-03-25" },
    { id: 42, title: "第四十二章：山脊·野兽师", subtitle: "后宫互动", desc: "挑战山脊BOSS野兽师鲁乌格，赛丽亚受伤，深夜教导敏泰如何成为林克的女人。", status: "已完结", date: "2026-03-25" },
    { id: 43, title: "第四十三章：番外·雪山温泉", subtitle: "敏泰献身", desc: "班图族温泉中，赛丽亚引导敏泰向林克献身，三人共度温馨之夜。", status: "已完结", date: "2026-03-25" },
    { id: 44, title: "第四十四章：白色废墟", subtitle: "雪魈王", desc: "探索白色废墟，遭遇雪魈、冰精灵、被控制的班图族战士，配合击败雪魈王。", status: "已完结", date: "2026-03-25" },
    { id: 45, title: "第四十五章：冰雪宫殿", subtitle: "冰龙侍从", desc: "深入冰雪宫殿，遭遇冰蜘蛛、冰霜巨人，最终击败冰龙侍从，获得进入巢穴的资格。", status: "已完结", date: "2026-03-25" },
    { id: 46, title: "第四十六章：布万加修炼场", subtitle: "突破", desc: "在布万加修炼场接受训练，林克领悟山岳剑势，赛丽亚点燃心火，敏泰获得母亲骨杖。", status: "已完结", date: "2026-03-25" },
    { id: 47, title: "第四十七章：斯卡萨之巢·龙威", subtitle: "初战冰龙", desc: "首次挑战冰龙斯卡萨，巴卡尔三龙崽背景揭露，不敌撤退，奥尔卡、奥菲利亚、查理赶来支援。", status: "已完结", date: "2026-03-25" }
];

// DOM加载完成后初始化
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// ==================== 主题切换 ====================
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// ==================== 导航栏 ====================
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// ==================== 粒子效果 ====================
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// ==================== 首页最新章节 ====================
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// ==================== 章节列表页 ====================
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// ==================== 阅读器 ====================
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            <p class="chapter-subtitle">${chapter.subtitle}</p>
        </div>
        <div class="chapter-body">
            <p class="placeholder-text">正在从飞书文档加载内容...</p>
            <p class="placeholder-text">章节链接：<a href="${getChapterUrl(chapterId)}" target="_blank">在飞书文档中查看</a></p>
        </div>
        <div class="chapter-footer">
            <p>本章完</p>
        </div>
    `;
}

function getChapterUrl(chapterId) {
    const urls = {
        1: 'https://www.feishu.cn/docx/KBdwdTd8foLLfSxCOmDcNr1LnKe',
        2: 'https://www.feishu.cn/docx/Jt0wdpCwDoq7zKxT2TUc54Hlnmd',
        3: 'https://www.feishu.cn/docx/G0jXdqGzPoVLe9x9S9qcPzTJnsc',
        4: 'https://www.feishu.cn/docx/IckMdiy7cor3fCxap2ic1D40n4d',
        5: 'https://www.feishu.cn/docx/PQBMdL9DQosxe1xsq34czRnFnPc',
        6: 'https://www.feishu.cn/docx/XflsdWsoRoyS5Xxg91VcmkysnlK',
        7: 'https://www.feishu.cn/docx/XL9YdobRMoaSwXxTe23cpuwynkh',
        8: 'https://www.feishu.cn/docx/FJ80dI1A1oCRgIxR6i2cIXESnnd',
        9: 'https://www.feishu.cn/docx/L2tydWs0Bo84h4xE3hbcfl8MnPg',
        10: 'https://www.feishu.cn/docx/Iu2LdfRg2oEP2zxh3kRcqBJ9n1f',
        11: 'https://www.feishu.cn/docx/NEiJdna0Jo1OHEx1s84cbNgBn1e',
        12: 'https://www.feishu.cn/docx/L2j3dt7PQodXFKxSuoScT3BZnkc',
        13: 'https://www.feishu.cn/docx/WHgFdA6NXoyynwxdLmMcjZaPnfd',
        14: 'https://www.feishu.cn/docx/FhoNdTZq8oPs91xrb2Gcg2udnAh'
    };
    return urls[chapterId] || '#';
}

function initReaderSettings() {
    const settingsToggle = document.getElementById('settingsToggle');
    const readerSettings = document.getElementById('readerSettings');
    const overlay = document.getElementById('overlay');
    
    if (settingsToggle) {
        settingsToggle.addEventListener('click', () => {
            readerSettings.classList.toggle('active');
            overlay.classList.toggle('active');
        });
    }
    
    if (overlay) {
        overlay.addEventListener('click', () => {
            readerSettings.classList.remove('active');
            overlay.classList.remove('active');
        });
    }
    
    // 字体大小
    const sizeBtns = document.querySelectorAll('.size-btn');
    sizeBtns.forEach(btn => {
        btn.addEventListener('click', () => {
            sizeBtns.forEach(b => b.classList.remove('active'));
            btn.classList.add('active');
            
            const size = btn.dataset.size;
            const sizes = { small: '16px', normal: '18px', large: '20px' };
            document.getElementById('chapterContent').style.fontSize = sizes[size];
        });
    });
    
    // 主题
    const themeOptions = document.querySelectorAll('.theme-option');
    themeOptions.forEach(option => {
        option.addEventListener('click', () => {
            themeOptions.forEach(o => o.classList.remove('active'));
            option.classList.add('active');
            
            const theme = option.dataset.theme;
            document.documentElement.setAttribute('data-theme', theme);
            localStorage.setItem('theme', theme);
        });
    });
}

function initReaderNav(currentId) {
    const prevBtn = document.getElementById('prevChapter');
    const nextBtn = document.getElementById('nextChapter');
    
    if (prevBtn) {
        if (currentId > 1) {
            prevBtn.disabled = false;
            prevBtn.addEventListener('click', () => {
                window.location.href = `reader.html?chapter=${currentId - 1}`;
            });
        } else {
            prevBtn.disabled = true;
        }
    }
    
    if (nextBtn) {
        if (currentId < chaptersData.length) {
            nextBtn.disabled = false;
            nextBtn.addEventListener('click', () => {
                window.location.href = `reader.html?chapter=${currentId + 1}`;
            });
        } else {
            nextBtn.disabled = true;
        }
    }
}

function initSidebar() {
    const openSidebar = document.getElementById('openSidebar');
    const sidebarClose = document.getElementById('sidebarClose');
    const readerSidebar = document.getElementById('readerSidebar');
    const overlay = document.getElementById('overlay');
    
    // 生成侧边栏章节列表
    const sidebarChapters = document.getElementById('sidebarChapters');
    if (sidebarChapters) {
        sidebarChapters.innerHTML = chaptersData.map(chapter => `
            <a href="reader.html?chapter=${chapter.id}" class="sidebar-chapter ${chapter.id === getCurrentChapterId() ? 'active' : ''}">
                <span class="chapter-num">${chapter.id}</span>
                <span class="chapter-name">${chapter.title}</span>
            </a>
        `).join('');
    }
    
    if (openSidebar) {
        openSidebar.addEventListener('click', () => {
            readerSidebar.classList.add('active');
            overlay.classList.add('active');
        });
    }
    
    if (sidebarClose) {
        sidebarClose.addEventListener('click', () => {
            readerSidebar.classList.remove('active');
            overlay.classList.remove('active');
        });
    }
}

function getCurrentChapterId() {
    const urlParams = new URLSearchParams(window.location.search);
    return parseInt(urlParams.get('chapter')) || 1;
}

function recordReadingProgress(chapterId) {
    let readChapters = JSON.parse(localStorage.getItem('readChapters') || '[]');
    if (!readChapters.includes(chapterId)) {
        readChapters.push(chapterId);
        localStorage.setItem('readChapters', JSON.stringify(readChapters));
    }
    localStorage.setItem('lastReadChapter', chapterId);
}

function initAutoHide() {
    const header = document.getElementById('readerHeader');
    const footer = document.getElementById('readerFooter');
    let lastScrollY = window.scrollY;
    let ticking = false;
    
    window.addEventListener('scroll', () => {
        if (!ticking) {
            window.requestAnimationFrame(() => {
                const currentScrollY = window.scrollY;
                
                if (currentScrollY > lastScrollY && currentScrollY > 100) {
                    // 向下滚动，隐藏
                    header?.classList.add('hidden');
                    footer?.classList.add('hidden');
                } else {
                    // 向上滚动，显示
                    header?.classList.remove('hidden');
                    footer?.classList.remove('hidden');
                }
                
                lastScrollY = currentScrollY;
                ticking = false;
            });
            ticking = true;
        }
    });
}

// ==================== 工具函数 ====================
function debounce(func, wait) {
    let timeout;
    return function executedFunction(...args) {
        const later = () => {
            clearTimeout(timeout);
            func(...args);
        };
        clearTimeout(timeout);
        timeout = setTimeout(later, wait);
    };
}

function throttle(func, limit) {
    let inThrottle;
    return function(...args) {
        if (!inThrottle) {
            func.apply(this, args);
            inThrottle = true;
            setTimeout(() => inThrottle = false, limit);
        }
    };
}

// ==================== 回到顶部按钮 ====================
function initScrollTop() {
    const scrollTopBtn = document.getElementById('scrollTop');
    if (!scrollTopBtn) return;
    
    // 点击回到顶部
    scrollTopBtn.addEventListener('click', () => {
        window.scrollTo({
            top: 0,
            behavior: 'smooth'
        });
    });
    
    // 滚动时显示/隐藏按钮
    const toggleVisibility = () => {
        if (window.pageYOffset > 300) {
            scrollTopBtn.style.opacity = '1';
            scrollTopBtn.style.visibility = 'visible';
        } else {
            scrollTopBtn.style.opacity = '0';
            scrollTopBtn.style.visibility = 'hidden';
        }
    };
    
    // 初始状态隐藏
    scrollTopBtn.style.opacity = '0';
    scrollTopBtn.style.visibility = 'hidden';
    scrollTopBtn.style.transition = 'opacity 0.3s ease, visibility 0.3s ease';
    
    window.addEventListener('scroll', throttle(toggleVisibility, 100));
}

// ==================== 独立章节页面初始化 ====================
function initChapterReader() {
    const openSidebar = document.getElementById('openSidebar');
    const sidebarClose = document.getElementById('sidebarClose');
    const readerSidebar = document.getElementById('readerSidebar');
    const overlay = document.getElementById('overlay');
    const progressFill = document.getElementById('progressFill');
    
    // 动态计算进度条（基于总章节数）
    if (progressFill) {
        const totalChapters = chaptersData.length; // 从 chaptersData 获取总章节数
        const currentChapterMatch = window.location.pathname.match(/chapter-(\d+)\.html/);
        const currentChapter = currentChapterMatch ? parseInt(currentChapterMatch[1]) : 1;
        const progress = Math.round((currentChapter / totalChapters) * 100);
        progressFill.style.width = progress + '%';
    }
    
    if (openSidebar && readerSidebar && overlay) {
        openSidebar.addEventListener('click', () => {
            readerSidebar.classList.add('active');
            overlay.classList.add('active');
        });
    }
    
    if (sidebarClose && readerSidebar && overlay) {
        sidebarClose.addEventListener('click', () => {
            readerSidebar.classList.remove('active');
            overlay.classList.remove('active');
        });
    }
    
    if (overlay && readerSidebar) {
        overlay.addEventListener('click', () => {
            readerSidebar.classList.remove('active');
            overlay.classList.remove('active');
        });
    }
}

// ==================== 阅读器设置 ====================
function initReaderSettings() {
    const settingsBtn = document.getElementById('readerSettings');
    const settingsPanel = document.getElementById('settingsPanel');
    
    if (!settingsBtn || !settingsPanel) return;
    
    // 切换设置面板显示
    settingsBtn.addEventListener('click', (e) => {
        e.stopPropagation();
        settingsPanel.classList.toggle('active');
    });
    
    // 点击外部关闭面板
    document.addEventListener('click', (e) => {
        if (!settingsPanel.contains(e.target) && e.target !== settingsBtn) {
            settingsPanel.classList.remove('active');
        }
    });
    
    // 初始化主题
    initThemeSettings();
    
    // 初始化字体大小
    initFontSize();
    
    // 初始化行间距
    initLineHeight();
    
    // 初始化阅读宽度
    initReadWidth();
}

// 主题设置
function initThemeSettings() {
    const themeOptions = document.querySelectorAll('.theme-option');
    const savedTheme = localStorage.getItem('readerTheme') || 'dark';
    
    // 应用保存的主题
    document.documentElement.setAttribute('data-theme', savedTheme);
    
    // 设置激活状态
    themeOptions.forEach(option => {
        if (option.dataset.theme === savedTheme) {
            option.classList.add('active');
        }
        
        option.addEventListener('click', () => {
            const theme = option.dataset.theme;
            document.documentElement.setAttribute('data-theme', theme);
            localStorage.setItem('readerTheme', theme);
            
            themeOptions.forEach(o => o.classList.remove('active'));
            option.classList.add('active');
        });
    });
}

// 字体大小设置
function initFontSize() {
    const decreaseBtn = document.getElementById('fontDecrease');
    const increaseBtn = document.getElementById('fontIncrease');
    const fontValue = document.getElementById('fontValue');
    const content = document.querySelector('.chapter-article');
    
    if (!content) return;
    
    const sizes = ['14px', '16px', '18px', '20px', '22px', '24px'];
    let currentSize = localStorage.getItem('readerFontSize') || '18px';
    
    // 应用保存的字体大小
    content.style.fontSize = currentSize;
    fontValue.textContent = currentSize;
    
    decreaseBtn?.addEventListener('click', () => {
        const index = sizes.indexOf(currentSize);
        if (index > 0) {
            currentSize = sizes[index - 1];
            content.style.fontSize = currentSize;
            fontValue.textContent = currentSize;
            localStorage.setItem('readerFontSize', currentSize);
        }
    });
    
    increaseBtn?.addEventListener('click', () => {
        const index = sizes.indexOf(currentSize);
        if (index < sizes.length - 1) {
            currentSize = sizes[index + 1];
            content.style.fontSize = currentSize;
            fontValue.textContent = currentSize;
            localStorage.setItem('readerFontSize', currentSize);
        }
    });
}

// 行间距设置
function initLineHeight() {
    const lineHeightBtns = document.querySelectorAll('.line-height-btn');
    const content = document.querySelector('.chapter-article');
    
    if (!content) return;
    
    const savedLineHeight = localStorage.getItem('readerLineHeight') || '1.8';
    content.style.lineHeight = savedLineHeight;
    
    lineHeightBtns.forEach(btn => {
        if (btn.dataset.value === savedLineHeight) {
            btn.classList.add('active');
        }
        
        btn.addEventListener('click', () => {
            const value = btn.dataset.value;
            content.style.lineHeight = value;
            localStorage.setItem('readerLineHeight', value);
            
            lineHeightBtns.forEach(b => b.classList.remove('active'));
            btn.classList.add('active');
        });
    });
}

// 阅读宽度设置
function initReadWidth() {
    const widthBtns = document.querySelectorAll('.width-btn');
    const content = document.querySelector('.reader-content');
    
    if (!content) return;
    
    const savedWidth = localStorage.getItem('readerWidth') || 'medium';
    applyWidth(content, savedWidth);
    
    widthBtns.forEach(btn => {
        if (btn.dataset.width === savedWidth) {
            btn.classList.add('active');
        }
        
        btn.addEventListener('click', () => {
            const width = btn.dataset.width;
            applyWidth(content, width);
            localStorage.setItem('readerWidth', width);
            
            widthBtns.forEach(b => b.classList.remove('active'));
            btn.classList.add('active');
        });
    });
}

function applyWidth(content, width) {
    const widths = {
        narrow: '680px',
        medium: '800px',
        wide: '100%'
    };
    content.style.maxWidth = widths[width] || widths.medium;
}