/* =========================================
   设计令牌 (Design Tokens) - 现代私人书房
   ========================================= */
:root {
    --bg-color: #F5F1E8;       
    --text-main: #292722;      
    --text-secondary: #777268; 
    --border-color: #D8D1C4;   
    --accent-red: #8B3A32;     
    --accent-green: #66705A;   
    
    --font-ui: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-book: 'Noto Serif SC', serif;
}

/* =========================================
   基础重置 & 全局样式
   ========================================= */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font-ui);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 80px; 
}

.serif { font-family: var(--font-book); }
a { text-decoration: none; color: inherit; }

/* =========================================
   布局容器
   ========================================= */
.app-header {
    max-width: 800px; margin: 0 auto; padding: 40px 24px 20px;
}
.app-title {
    font-size: 1.2rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 4px;
}
.app-date {
    font-size: 0.9rem; color: var(--text-secondary); letter-spacing: 0.5px;
}
.app-main {
    max-width: 800px; margin: 0 auto; padding: 0 24px;
}

/* =========================================
   排版组件
   ========================================= */
.section-title {
    font-size: 0.9rem; color: var(--text-secondary); border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px; margin: 32px 0 24px 0; font-weight: normal;
}
.book-entry {
    margin-bottom: 40px; padding-left: 16px; border-left: 2px solid var(--border-color); transition: opacity 0.2s;
}
.book-entry.status-reading { border-left-color: var(--accent-red); }
.book-entry.status-completed { border-left-color: var(--accent-green); }
.book-entry.status-abandoned { opacity: 0.6; }
.book-entry.status-unread { border-left-color: transparent; border-left: 2px solid #EAE5D9; }

.book-title {
    font-size: 1.5rem; font-weight: 600; color: var(--text-main); margin-bottom: 4px; line-height: 1.4;
}
.book-author {
    font-size: 1rem; color: var(--text-main); margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
}
.book-meta {
    font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 24px;
}
.book-meta span::after { content: " · "; }
.book-meta span:last-child::after { content: ""; }

/* 状态微标 */
.book-badge {
    font-size: 0.75rem; padding: 2px 6px; border-radius: 2px; border: 1px solid var(--border-color); color: var(--text-secondary); font-family: var(--font-ui);
}
.book-badge.status-reading { border-color: var(--accent-red); color: var(--accent-red); }
.book-badge.status-completed { border-color: var(--accent-green); color: var(--accent-green); }

/* =========================================
   进度条与打卡面板
   ========================================= */
.progress-container { margin-bottom: 8px; display: flex; align-items: center; gap: 12px; }
.progress-line { flex-grow: 1; height: 2px; background-color: var(--border-color); position: relative; }
.progress-fill { position: absolute; left: 0; top: 0; height: 100%; background-color: var(--accent-red); transition: width 0.3s ease; }
.progress-text { font-size: 0.9rem; color: var(--text-main); min-width: 40px; text-align: right; }
.read-history { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 24px; }

.quick-actions { display: flex; gap: 8px; margin-bottom: 24px; justify-content: space-between; }
.btn-quick {
    flex: 1; background: transparent; border: 1px solid var(--border-color); color: var(--text-main);
    padding: 10px 0; border-radius: 4px; font-size: 1rem; cursor: pointer;
}
.btn-quick:active { background: var(--border-color); }
.progress-input-group { margin-bottom: 16px; }
.progress-input-group input {
    width: 100%; padding: 12px; font-size: 1.1rem; border: 1px solid var(--border-color);
    background: transparent; color: var(--text-main); outline: none; border-radius: 4px;
}
.progress-input-group input:focus { border-color: var(--accent-red); }

/* =========================================
   本周阅读面板 & 书库面板
   ========================================= */
.week-summary {
    display: flex; justify-content: space-between; align-items: baseline;
    margin-bottom: 32px; border-bottom: 1px solid var(--border-color); padding-bottom: 16px;
}
.week-capacity { font-size: 1.5rem; color: var(--accent-red); font-weight: 500; }
.week-capacity-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; }
.week-stats { font-size: 0.85rem; color: var(--text-secondary); }

.slot-entry { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 24px; }
.slot-number { font-size: 1.2rem; color: var(--border-color); font-family: var(--font-book); font-weight: 900; width: 24px; padding-top: 2px; }
.slot-content { flex: 1; padding-bottom: 24px; border-bottom: 1px dashed var(--border-color); }
.slot-empty { color: var(--text-secondary); cursor: pointer; padding-top: 4px; font-size: 0.95rem; }

/* 书库专属控件 */
.search-input {
    width: 100%; padding: 10px 0; font-size: 1rem; color: var(--text-main); background: transparent;
    border: none; border-bottom: 1px solid var(--border-color); outline: none; font-family: var(--font-ui);
}
.search-input:focus { border-bottom-color: var(--accent-red); }

.filter-tabs {
    display: flex; gap: 16px; margin-top: 16px; overflow-x: auto; padding-bottom: 8px; white-space: nowrap;
}
.filter-tabs::-webkit-scrollbar { display: none; }
.filter-tab {
    background: transparent; border: none; font-size: 0.9rem; color: var(--text-secondary); cursor: pointer; padding-bottom: 4px; border-bottom: 2px solid transparent; font-family: var(--font-ui);
}
.filter-tab.active { color: var(--text-main); font-weight: 500; border-bottom-color: var(--text-main); }
.lib-entry { margin-bottom: 24px; }

/* =========================================
   按钮系统 & 导航
   ========================================= */
.btn-primary {
    display: inline-block; background: transparent; color: var(--accent-red);
    border: 1px solid var(--accent-red); padding: 10px 20px; font-size: 0.95rem;
    cursor: pointer; transition: all 0.2s; font-family: var(--font-ui);
}
.btn-primary:hover { background: var(--accent-red); color: var(--bg-color); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.app-nav {
    position: fixed; bottom: 0; left: 0; width: 100%;
    background-color: rgba(245, 241, 232, 0.95); backdrop-filter: blur(4px);
    border-top: 1px solid var(--border-color); display: flex; justify-content: space-around;
    padding: 16px 0 calc(16px + env(safe-area-inset-bottom)); z-index: 100;
}
.nav-item { font-size: 0.85rem; color: var(--text-secondary); padding: 4px 12px; }
.nav-item.active { color: var(--text-main); font-weight: 500; }

@media (min-width: 768px) {
    body { padding-bottom: 0; }
    .app-nav {
        position: absolute; top: 40px; right: 24px; bottom: auto; left: auto;
        width: auto; border-top: none; background: transparent; padding: 0; gap: 24px;
    }
}

/* 鉴权弹窗 */
.overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: var(--bg-color);
    display: flex; align-items: center; justify-content: center; z-index: 1000;
}
.overlay.hidden { display: none; }
.auth-box { max-width: 320px; width: 100%; padding: 24px; }
.auth-box h2 { margin-bottom: 12px; font-weight: normal; }
.auth-box p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 24px; }
.auth-box input {
    width: 100%; padding: 10px; margin-bottom: 16px; background: transparent;
    border: 1px solid var(--border-color); outline: none; font-family: monospace; color: var(--text-main);
}
/* =========================================
   统计模块 (Phase 5)
   ========================================= */
.stats-header {
    display: flex; justify-content: space-between; align-items: baseline;
    margin-bottom: 24px;
}
.stats-year-title { font-size: 1.2rem; font-weight: 500; font-family: var(--font-ui); }

/* 顶部四大数据：移动端 2列，桌面端 4列 */
.stats-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 48px;
}
@media (min-width: 768px) {
    .stats-grid { grid-template-columns: repeat(4, 1fr); }
}
.stat-box { display: flex; flex-direction: column; gap: 6px; }
.stat-label { font-size: 0.85rem; color: var(--text-secondary); }
.stat-value { font-size: 2rem; font-family: var(--font-ui); color: var(--text-main); font-weight: 500; line-height: 1; }

.chart-container { margin-bottom: 48px; }

/* 极简竖向柱状图 (每月体量) */
.bar-chart-vertical {
    display: flex; align-items: flex-end; justify-content: space-between;
    height: 140px; margin-top: 24px; padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color); gap: 4px;
}
.bar-v-col {
    flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end;
    gap: 8px; height: 100%;
}
.bar-v-fill {
    width: 100%; max-width: 24px; background-color: var(--text-secondary);
    min-height: 1px; transition: height 0.3s ease;
}
.bar-v-label { font-size: 0.75rem; color: var(--text-secondary); }
.bar-v-val { font-size: 0.75rem; color: var(--text-main); opacity: 0; transition: opacity 0.2s; }
.bar-v-col:hover .bar-v-val { opacity: 1; } /* 移动端可以通过长按查看具体数值 */

/* 极简横向条形图 (书本体量分布) */
.bar-chart-horizontal { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }
.bar-h-row { display: flex; align-items: center; gap: 16px; font-size: 0.85rem; }
.bar-h-label { width: 60px; color: var(--text-secondary); }
.bar-h-track { flex: 1; height: 8px; display: flex; align-items: center; }
.bar-h-fill { height: 100%; background-color: var(--text-secondary); min-width: 1px; }
.bar-h-val { width: 24px; text-align: right; color: var(--text-main); }

/* 分类列表 */
.stat-list { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }
.stat-list-item {
    display: flex; justify-content: space-between; font-size: 0.9rem;
    border-bottom: 1px dashed var(--border-color); padding-bottom: 4px; color: var(--text-main);
}

/* 最近读完时间轴 */
.recent-list { display: flex; flex-direction: column; gap: 20px; margin-top: 24px; }
.recent-item { padding-left: 12px; border-left: 2px solid var(--accent-green); }
.recent-title { font-size: 1.1rem; color: var(--text-main); margin-bottom: 4px; }
.recent-meta { font-size: 0.85rem; color: var(--text-secondary); }
/* =========================================
   标星打分系统
   ========================================= */
.rating-stars { 
    display: flex; gap: 8px; margin-bottom: 12px; cursor: pointer; user-select: none;
}
.star { 
    font-size: 1.8rem; color: var(--border-color); transition: color 0.2s, transform 0.1s; 
}
.star:active { transform: scale(0.9); }
.star:hover ~ .star { color: var(--border-color) !important; }
.rating-stars:hover .star { color: rgba(139, 58, 50, 0.5); /* 悬停时显示浅砖红 */ }
.star.active { color: var(--accent-red); /* 点亮时显示砖红 */ }
/* =========================================
   设置模块 (Phase 6)
   ========================================= */
.settings-group { 
    margin-bottom: 32px; padding: 20px; 
    background: rgba(0,0,0,0.02); border: 1px solid var(--border-color); border-radius: 4px; 
}
.settings-label { 
    font-size: 1rem; font-family: var(--font-ui); color: var(--text-main); 
    margin-bottom: 8px; display: block; font-weight: 500;
}
.btn-danger { 
    background: transparent; color: var(--accent-red); border: 1px solid var(--accent-red); 
    padding: 8px 16px; border-radius: 4px; cursor: pointer; font-family: var(--font-ui); 
    transition: all 0.2s; font-size: 0.9rem;
}
.btn-danger:hover { background: var(--accent-red); color: #fff; }

/* =========================================================
   Reading Room — Editorial Visual Layer v1
   私人书房 × 旧书刊 × 克制数字产品
   ========================================================= */

:root {
    --bg-color: #F1ECE2;
    --paper: #F8F4EA;
    --paper-deep: #EAE2D3;
    --text-main: #25231F;
    --text-secondary: #777166;
    --muted: #9B9387;
    --border-color: #D4CCBD;
    --border-strong: #B8AE9E;
    --accent-red: #8C4037;
    --accent-red-soft: rgba(140, 64, 55, 0.10);
    --accent-green: #59624F;
    --shadow-paper: 0 10px 30px rgba(55, 46, 35, 0.06);
    --content-width: 1040px;
}

html {
    background: var(--bg-color);
    scroll-behavior: smooth;
}

body {
    background:
        linear-gradient(rgba(255,255,255,0.18), rgba(255,255,255,0.18)),
        var(--bg-color);
    color: var(--text-main);
    letter-spacing: 0.01em;
}

button,
input,
select {
    font: inherit;
}

button {
    -webkit-tap-highlight-color: transparent;
}

::selection {
    background: var(--accent-red);
    color: var(--paper);
}

/* 顶部：更像书刊页眉，而不是 App 标题栏 */
.app-header {
    max-width: var(--content-width);
    padding: 46px 28px 26px;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.app-title {
    color: var(--text-main);
    font-size: clamp(1.35rem, 2vw, 1.65rem);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: 0.08em;
    margin-bottom: 9px;
}

.app-title::before {
    content: "PRIVATE READING DESK";
    display: block;
    font-family: var(--font-ui);
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    color: var(--accent-red);
    font-weight: 500;
    margin-bottom: 9px;
}

.app-date {
    color: var(--text-secondary);
    font-size: 0.78rem;
    letter-spacing: 0.05em;
}

.app-main {
    max-width: var(--content-width);
    padding: 10px 28px 70px;
}

/* 页内标题：细线 + 微型栏目名 */
.section-title {
    position: relative;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: none;
    padding-bottom: 11px;
    margin: 34px 0 26px;
}

.section-title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 34px;
    height: 2px;
    background: var(--accent-red);
}

/* 首页 */
body[data-view="home"] .app-main {
    padding-top: 8px;
}

body[data-view="home"] .section-title {
    margin-top: 12px;
    margin-bottom: 28px;
}

body[data-view="home"] .book-entry.status-reading {
    background: var(--paper);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-red);
    box-shadow: var(--shadow-paper);
    padding: 28px 30px 26px;
    margin-bottom: 22px;
    cursor: pointer;
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

body[data-view="home"] .book-entry.status-reading:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 36px rgba(55, 46, 35, 0.09);
    border-color: var(--border-strong);
}

body[data-view="home"] .book-title {
    font-size: clamp(1.65rem, 4vw, 2.35rem);
    line-height: 1.35;
    letter-spacing: 0.015em;
    margin-bottom: 8px;
}

body[data-view="home"] .book-author {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 18px;
}

body[data-view="home"] .book-meta {
    font-size: 0.74rem;
    letter-spacing: 0.04em;
    margin-bottom: 22px;
}

body[data-view="home"] .progress-container {
    gap: 15px;
}

body[data-view="home"] .progress-line {
    height: 3px;
    background: var(--paper-deep);
}

body[data-view="home"] .progress-fill {
    background: var(--accent-red);
}

body[data-view="home"] .progress-text {
    color: var(--accent-red);
    font-size: 0.78rem;
}

body[data-view="home"] .read-history {
    color: var(--muted);
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    margin-top: 10px;
    margin-bottom: 18px;
}

/* 按钮：更像书刊上的操作词，而不是 SaaS 控件 */
.btn-primary {
    border-color: var(--accent-red);
    color: var(--accent-red);
    background: transparent;
    padding: 9px 15px;
    letter-spacing: 0.04em;
    border-radius: 1px;
    transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.btn-primary:hover {
    background: var(--accent-red);
    color: var(--paper);
    transform: translateY(-1px);
}

.btn-quick {
    background: var(--paper);
    border: 1px solid var(--border-color);
    border-radius: 1px;
    color: var(--text-main);
    padding: 9px 12px;
    transition: background 160ms ease, border-color 160ms ease;
}

.btn-quick:hover {
    background: var(--paper-deep);
    border-color: var(--border-strong);
}

.book-badge {
    border-radius: 1px;
    padding: 3px 7px;
    letter-spacing: 0.03em;
    background: transparent;
}

.book-badge.status-reading {
    border-color: var(--accent-red);
    color: var(--accent-red);
    background: var(--accent-red-soft);
}

.book-badge.status-completed {
    border-color: var(--accent-green);
    color: var(--accent-green);
    background: rgba(89, 98, 79, 0.08);
}

/* 进度页 */
body[data-view="week"] .week-summary {
    padding: 22px 0 20px;
    margin-bottom: 26px;
}

body[data-view="week"] .week-capacity {
    font-family: var(--font-book);
    font-size: 2.3rem;
    color: var(--text-main);
    letter-spacing: 0.03em;
}

body[data-view="week"] .week-capacity-label {
    color: var(--text-secondary);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
}

body[data-view="week"] .week-stats {
    color: var(--muted);
}

body[data-view="week"] .slot-entry {
    gap: 20px;
    margin-bottom: 10px;
}

body[data-view="week"] .slot-number {
    color: var(--border-strong);
    font-size: 1rem;
    width: 30px;
    padding-top: 15px;
    letter-spacing: 0.08em;
}

body[data-view="week"] .slot-content {
    padding: 14px 0 24px;
    border-bottom: 1px solid var(--border-color);
}

body[data-view="week"] .slot-content .book-title {
    font-size: 1.25rem !important;
    margin-bottom: 10px !important;
}

/* 书库：像目录，不像卡片墙 */
body[data-view="library"] #lib-list {
    border-top: 1px solid var(--border-color);
}

body[data-view="library"] .lib-entry {
    margin-bottom: 0;
    padding: 18px 0 20px;
    border-left: none !important;
    border-bottom: 1px solid var(--border-color);
    opacity: 1;
}

body[data-view="library"] .lib-entry:hover {
    background: linear-gradient(90deg, rgba(255,255,255,0.28), transparent);
}

body[data-view="library"] .lib-entry .book-title {
    font-size: 1.06rem !important;
    margin-bottom: 7px !important;
}

body[data-view="library"] .lib-entry .book-author {
    color: var(--text-secondary);
    font-size: 0.82rem !important;
}

body[data-view="library"] .lib-entry.status-reading {
    padding-left: 14px;
    border-left: 3px solid var(--accent-red) !important;
}

body[data-view="library"] .search-input {
    border-bottom-color: var(--border-strong);
}

body[data-view="library"] .filter-tabs {
    gap: 21px;
    margin-top: 18px;
}

body[data-view="library"] .filter-tab {
    color: var(--muted);
    letter-spacing: 0.03em;
}

body[data-view="library"] .filter-tab.active {
    color: var(--text-main);
    border-bottom-color: var(--accent-red);
}

/* 原生 select 做得更像纸张上的编辑控件 */
select.search-input {
    border: 1px solid var(--border-color) !important;
    border-radius: 1px;
    background: var(--paper) !important;
}

/* 详情页 */
body[data-view="detail"] .app-main,
body[data-view="update"] .app-main {
    padding-top: 22px;
}

body[data-view="detail"] .book-title {
    font-size: clamp(2rem, 5vw, 3.25rem) !important;
    line-height: 1.2;
    letter-spacing: 0;
    margin-bottom: 12px !important;
}

body[data-view="detail"] .book-author {
    color: var(--text-secondary);
    font-size: 1rem !important;
}

body[data-view="detail"] .book-meta {
    font-size: 0.76rem !important;
    color: var(--muted);
    letter-spacing: 0.04em;
}

body[data-view="detail"] #app-view > div:first-child a,
body[data-view="update"] #app-view > div:first-child a {
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}

body[data-view="detail"] #app-view > div:nth-of-type(2) {
    padding-bottom: 28px;
    border-bottom: 1px solid var(--border-color);
}

/* 评分区域 */
.rating-stars {
    gap: 5px;
}

.star {
    font-size: 1.45rem;
}

/* 统计页：从数据面板变成年鉴 */
body[data-view="stats"] .stats-year-title {
    font-family: var(--font-book);
    font-size: 1.65rem;
    font-weight: 400;
}

body[data-view="stats"] .stats-grid {
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    gap: 0;
    margin-bottom: 54px;
}

body[data-view="stats"] .stat-box {
    padding: 20px 16px 18px 0;
    border-right: 1px solid var(--border-color);
}

body[data-view="stats"] .stat-box:last-child {
    border-right: none;
}

body[data-view="stats"] .stat-value {
    font-family: var(--font-book);
    font-size: 2.25rem;
    font-weight: 400;
}

body[data-view="stats"] .bar-chart-vertical {
    height: 170px;
    padding-bottom: 10px;
}

body[data-view="stats"] .bar-v-fill {
    background: var(--accent-red);
    opacity: 0.72;
}

body[data-view="stats"] .bar-v-col:first-child .bar-v-fill,
body[data-view="stats"] .bar-v-col:last-child .bar-v-fill {
    opacity: 0.42;
}

body[data-view="stats"] .bar-h-fill {
    background: var(--accent-green);
    opacity: 0.76;
}

body[data-view="stats"] .recent-item {
    border-left-color: var(--accent-red);
}

/* 设置页 */
body[data-view="settings"] .settings-group {
    background: var(--paper);
    border: 1px solid var(--border-color);
    border-radius: 1px;
    box-shadow: none;
    padding: 22px 24px;
}

body[data-view="settings"] .settings-label {
    font-family: var(--font-book);
    font-size: 1.05rem;
    font-weight: 400;
}

body[data-view="settings"] .btn-danger {
    border-radius: 1px;
}

/* 导航：桌面是页眉目录，移动是纸张索引 */
.app-nav {
    border-top-color: var(--border-color);
    background: rgba(241, 236, 226, 0.94);
    backdrop-filter: blur(10px);
}

.nav-item {
    letter-spacing: 0.06em;
    transition: color 140ms ease;
}

.nav-item.active {
    color: var(--accent-red);
}

@media (min-width: 768px) {
    .app-nav {
        top: 49px;
        right: max(24px, calc((100vw - var(--content-width)) / 2 + 28px));
        gap: 21px;
    }

    .nav-item {
        padding: 4px 0;
        position: relative;
    }

    .nav-item.active::after {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        bottom: -7px;
        height: 1px;
        background: var(--accent-red);
    }

    body[data-view="library"] #lib-list {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        column-gap: 38px;
    }

    body[data-view="library"] .lib-entry {
        min-width: 0;
    }

    body[data-view="home"] .book-entry.status-reading {
        padding-right: 40px;
    }
}

@media (max-width: 767px) {
    .app-header {
        padding: 30px 20px 19px;
    }

    .app-main {
        padding-left: 20px;
        padding-right: 20px;
        padding-bottom: 88px;
    }

    .app-title {
        font-size: 1.2rem;
        letter-spacing: 0.06em;
    }

    body[data-view="home"] .book-entry.status-reading {
        padding: 22px 20px 21px;
    }

    body[data-view="home"] .book-title {
        font-size: 1.55rem;
    }

    body[data-view="stats"] .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    body[data-view="stats"] .stat-box:nth-child(2) {
        border-right: none;
    }

    body[data-view="stats"] .stat-box:nth-child(-n+2) {
        border-bottom: 1px solid var(--border-color);
    }

    body[data-view="library"] #lib-list {
        display: block;
    }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        transition: none !important;
        animation: none !important;
    }
}


/* 完成阅读：把“读完”做成一次小型收束仪式 */
.complete-dialog {
    width: min(520px, calc(100vw - 40px));
    background: var(--paper);
    border: 1px solid var(--border-color);
    box-shadow: 0 18px 50px rgba(55, 46, 35, 0.12);
    padding: 30px 32px 28px;
}

.complete-kicker {
    color: var(--accent-red);
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    margin-bottom: 12px;
}

.complete-title {
    color: var(--text-main);
    font-size: clamp(1.5rem, 4vw, 2rem);
    line-height: 1.35;
    margin-bottom: 8px;
}

.complete-copy {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 24px;
}

.completion-field {
    margin-bottom: 22px;
}

.completion-label {
    display: flex;
    align-items: baseline;
    gap: 8px;
    color: var(--text-main);
    font-size: 0.82rem;
    margin-bottom: 9px;
}

.completion-label span {
    color: var(--muted);
    font-size: 0.72rem;
}

.completion-stars {
    display: flex;
    gap: 5px;
}

.completion-star {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--border-strong);
    padding: 2px 3px;
    font-size: 1.65rem;
    line-height: 1;
    cursor: pointer;
    transition: color 140ms ease, transform 140ms ease;
}

.completion-star:hover,
.completion-star.active {
    color: var(--accent-red);
}

.completion-star:active {
    transform: scale(0.92);
}

.completion-note {
    width: 100%;
    resize: vertical;
    min-height: 104px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-main);
    outline: none;
    padding: 12px 13px;
    line-height: 1.65;
}

.completion-note:focus {
    border-color: var(--border-strong);
    box-shadow: inset 0 -2px 0 var(--accent-red);
}

.completion-note::placeholder {
    color: var(--muted);
}

.completion-status {
    min-height: 20px;
    color: var(--accent-red);
    font-size: 0.78rem;
    margin-bottom: 8px;
}

.completion-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

@media (max-width: 767px) {
    .complete-dialog {
        width: calc(100vw - 28px);
        padding: 24px 20px 22px;
    }
}


/* =========================================================
   Reading Room — Final Polish v1.1
   ========================================================= */

.home-intro {
    padding: 22px 0 30px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 4px;
}

.home-intro-kicker {
    color: var(--accent-red);
    font-size: 0.61rem;
    letter-spacing: 0.18em;
    margin-bottom: 12px;
}

.home-intro-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    line-height: 1.15;
    color: var(--text-main);
    margin-bottom: 12px;
}

.home-intro-note {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.7;
    max-width: 620px;
}

.home-intro-note strong {
    color: var(--accent-red);
    font-weight: 500;
}

.app-toast {
    position: fixed;
    z-index: 2000;
    left: 50%;
    bottom: 28px;
    transform: translate(-50%, 14px);
    opacity: 0;
    pointer-events: none;
    width: max-content;
    max-width: min(520px, calc(100vw - 32px));
    padding: 10px 15px;
    border: 1px solid var(--border-strong);
    background: var(--paper);
    color: var(--text-main);
    box-shadow: 0 12px 34px rgba(55, 46, 35, 0.12);
    font-size: 0.78rem;
    letter-spacing: 0.02em;
    transition: opacity 180ms ease, transform 180ms ease;
}

.app-toast.visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

.app-toast.success {
    border-color: var(--accent-green);
}

.app-toast.error {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.complete-dialog {
    border-top: 3px solid var(--accent-red);
}

.completion-stars {
    min-height: 34px;
}

.completion-star:focus-visible,
.btn-primary:focus-visible,
.btn-quick:focus-visible,
.nav-item:focus-visible {
    outline: 2px solid var(--accent-red);
    outline-offset: 3px;
}

@media (min-width: 768px) {
    body[data-view="home"] .home-intro {
        padding-top: 28px;
        padding-bottom: 36px;
    }
}

@media (max-width: 767px) {
    .home-intro {
        padding-top: 15px;
        padding-bottom: 24px;
    }

    .home-intro-title {
        font-size: 2rem;
    }

    .app-toast {
        bottom: 78px;
    }
}
/* =========================================================
   Reading Room — Layout Renewal
   ========================================================= */

.home-intro {
    padding-bottom: 28px;
    margin-bottom: 7px;
}

.desk-heading {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin: 30px 0 13px;
    color: var(--muted);
    font-size: 0.64rem;
    letter-spacing: 0.15em;
}

.desk-heading-secondary {
    margin-top: 44px;
}

.featured-reading {
    position: relative;
    display: grid;
    grid-template-columns: 70px 1fr;
    background: var(--paper);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-paper);
    cursor: pointer;
    overflow: hidden;
    transition: transform 180ms ease, box-shadow 180ms ease;
}

.featured-reading:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 38px rgba(55, 46, 35, 0.09);
}

.featured-index {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 26px;
    border-right: 1px solid var(--border-color);
    color: var(--border-strong);
    font-size: 0.84rem;
    letter-spacing: 0.08em;
}

.featured-main {
    padding: 28px 32px 24px;
}

.featured-kicker {
    color: var(--accent-red);
    font-size: 0.61rem;
    letter-spacing: 0.18em;
    margin-bottom: 12px;
}

.featured-title {
    font-size: clamp(2rem, 5vw, 3.15rem);
    line-height: 1.18;
    margin-bottom: 10px;
}

.featured-author {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 8px;
}

.featured-meta {
    color: var(--muted);
    font-size: 0.72rem;
    margin-bottom: 32px;
}

.featured-progress {
    max-width: 680px;
}

.featured-progress-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    color: var(--muted);
    font-size: 0.68rem;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.featured-progress-head strong {
    color: var(--accent-red);
    font-weight: 500;
}

.featured-progress-line {
    height: 4px;
    background: var(--paper-deep);
}

.featured-progress-fill {
    height: 100%;
    background: var(--accent-red);
}

.featured-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-top: 25px;
    color: var(--muted);
    font-size: 0.68rem;
}

.desk-list {
    border-top: 1px solid var(--border-color);
}

.desk-row {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr) 160px;
    gap: 15px;
    align-items: center;
    padding: 18px 0;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: padding 160ms ease, background 160ms ease;
}

.desk-row:hover {
    padding-left: 8px;
    padding-right: 8px;
    background: rgba(255,255,255,0.18);
}

.desk-row-index {
    color: var(--border-strong);
    font-size: 0.73rem;
    letter-spacing: 0.08em;
}

.desk-row-title {
    font-size: 1.03rem;
    margin-bottom: 3px;
}

.desk-row-author {
    color: var(--text-secondary);
    font-size: 0.73rem;
}

.desk-row-progress {
    color: var(--accent-red);
    font-size: 0.7rem;
}

.desk-row-line {
    height: 2px;
    margin-top: 7px;
    background: var(--paper-deep);
}

.desk-row-line div {
    height: 100%;
    background: var(--accent-red);
}

.home-empty {
    display: grid;
    grid-template-columns: 58px 1fr auto;
    align-items: center;
    gap: 18px;
    padding: 24px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.home-empty-mark {
    font-size: 2.5rem;
    color: var(--border-strong);
    text-align: center;
}

.home-empty-title {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.home-empty-copy {
    color: var(--text-secondary);
    font-size: 0.78rem;
}

/* 阅读进度：从“表单”变成一本阅读记录页 */
body[data-view="update"] .app-main {
    padding-top: 20px;
}

.progress-back {
    margin-bottom: 34px;
}

.progress-back a {
    color: var(--text-secondary);
    font-size: 0.78rem;
    letter-spacing: 0.03em;
}

.progress-editorial-head {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 25px;
}

.progress-editorial-kicker {
    color: var(--accent-red);
    font-size: 0.61rem;
    letter-spacing: 0.18em;
    margin-bottom: 11px;
}

.progress-editorial-title {
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.15;
    margin-bottom: 10px;
}

.progress-editorial-book {
    color: var(--text-secondary);
    font-size: 0.84rem;
}

.progress-desk {
    max-width: 760px;
    padding: 34px 0 20px;
}

.progress-big-number {
    color: var(--text-main);
    font-size: clamp(5rem, 14vw, 8.5rem);
    line-height: 0.9;
    letter-spacing: -0.04em;
}

.progress-big-number small {
    font-family: var(--font-ui);
    font-size: 0.22em;
    color: var(--muted);
    letter-spacing: 0;
    margin-left: 7px;
}

.progress-scale {
    margin-top: 34px;
}

.progress-scale-line {
    position: relative;
    height: 5px;
    background: var(--paper-deep);
}

.progress-scale-fill {
    height: 100%;
    background: var(--accent-red);
    transition: width 120ms ease;
}

.progress-scale-marks {
    display: flex;
    justify-content: space-between;
    margin-top: 9px;
}

.progress-mark {
    color: var(--muted);
    font-size: 0.57rem;
    transition: color 120ms ease;
}

.progress-mark.active {
    color: var(--accent-red);
}

.progress-entry {
    margin-top: 42px;
    max-width: 240px;
}

.progress-entry > label {
    display: block;
    color: var(--muted);
    font-size: 0.67rem;
    letter-spacing: 0.1em;
    margin-bottom: 7px;
}

.progress-entry-row {
    display: flex;
    align-items: baseline;
    border-bottom: 1px solid var(--border-strong);
}

.progress-entry-row input {
    width: 100%;
    border: 0;
    background: transparent;
    outline: 0;
    color: var(--text-main);
    padding: 6px 0 9px;
    font-family: var(--font-book);
    font-size: 1.25rem;
}

.progress-entry-row span {
    color: var(--muted);
    font-size: 0.8rem;
}

.progress-quick {
    margin-top: 34px;
}

.progress-quick-label {
    color: var(--muted);
    font-size: 0.67rem;
    letter-spacing: 0.1em;
    margin-bottom: 9px;
}

.progress-quick-buttons {
    display: grid;
    grid-template-columns: repeat(4, minmax(58px, 90px));
    gap: 7px;
}

.progress-action {
    margin-top: 34px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.progress-save {
    min-width: 190px;
}

.progress-status {
    min-height: 22px;
    margin-top: 11px;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

@media (max-width: 767px) {
    .featured-reading { grid-template-columns: 43px 1fr; }
    .featured-main { padding: 22px 19px 20px; }
    .featured-index { padding-top: 22px; }
    .featured-title { font-size: 1.75rem; }
    .featured-footer { align-items: flex-start; flex-direction: column; }
    .desk-row { grid-template-columns: 33px minmax(0, 1fr) 74px; gap: 10px; padding: 15px 0; }
    .desk-row-title { font-size: 0.95rem; }
    .home-empty { grid-template-columns: 42px 1fr; }
    .home-empty .btn-primary { grid-column: 2; justify-self: start; }
    .progress-desk { padding-top: 28px; }
    .progress-scale-marks { gap: 5px; }
    .progress-mark { font-size: 0.49rem; }
    .progress-entry { max-width: 100%; }
    .progress-quick-buttons { grid-template-columns: repeat(4, 1fr); }
    .progress-save { width: 100%; }
}


/* =========================================================
   Reading Room — Library & Yearbook Polish
   ========================================================= */

body[data-view="library"] .section-title {
    font-family: var(--font-book);
    font-size: clamp(1.8rem, 4vw, 2.55rem);
    font-weight: 400;
    letter-spacing: 0;
    margin-bottom: 5px;
}

body[data-view="library"] #lib-search {
    min-height: 42px;
    font-size: 0.82rem;
    padding-left: 0;
    padding-right: 0;
    border: 0 !important;
    border-bottom: 1px solid var(--border-strong) !important;
    background: transparent !important;
}

body[data-view="library"] #lib-search::placeholder {
    color: var(--muted);
}

body[data-view="library"] #lib-sort {
    min-height: 42px;
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
    font-size: 0.75rem;
}

body[data-view="library"] .lib-entry {
    position: relative;
    padding-left: 34px !important;
    counter-increment: library-entry;
}

body[data-view="library"] #lib-list {
    counter-reset: library-entry;
}

body[data-view="library"] .lib-entry::before {
    content: counter(library-entry, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 19px;
    color: var(--border-strong);
    font-size: 0.62rem;
    letter-spacing: 0.08em;
}

body[data-view="library"] .lib-entry.status-reading::before {
    color: var(--accent-red);
}

body[data-view="library"] .lib-entry .book-author .book-badge {
    margin-left: 5px;
}

body[data-view="library"] .book-badge {
    border-radius: 0;
    font-size: 0.62rem;
    padding: 2px 5px;
    letter-spacing: 0.04em;
}

body[data-view="library"] .filter-tabs {
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 4px;
}

body[data-view="library"] .filter-tabs::-webkit-scrollbar {
    display: none;
}

body[data-view="library"] .filter-tab {
    white-space: nowrap;
}

body[data-view="stats"] .stats-header {
    align-items: end;
    padding: 17px 0 16px;
    margin-bottom: 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

body[data-view="stats"] .stats-year-title {
    font-size: clamp(1.9rem, 5vw, 3rem);
    line-height: 1;
}

body[data-view="stats"] .stats-header > div:last-child {
    font-family: var(--font-ui);
    color: var(--muted) !important;
    font-size: 0.65rem !important;
    letter-spacing: 0.12em;
}

body[data-view="stats"] .chart-container {
    padding-top: 8px;
    margin-bottom: 56px;
}

body[data-view="stats"] .chart-container .section-title {
    font-family: var(--font-book);
    font-size: 1.05rem;
    font-weight: 400;
    padding-bottom: 11px;
    margin-bottom: 20px;
}

body[data-view="stats"] .bar-chart-vertical {
    border-bottom: 1px solid var(--border-color);
}

body[data-view="stats"] .bar-v-col {
    min-width: 24px;
}

body[data-view="stats"] .bar-v-val {
    color: var(--muted);
    font-size: 0.56rem;
    min-height: 13px;
}

body[data-view="stats"] .bar-v-label {
    color: var(--muted);
    font-size: 0.55rem;
}

body[data-view="stats"] .bar-h-row {
    min-height: 31px;
}

body[data-view="stats"] .bar-h-label,
body[data-view="stats"] .bar-h-val {
    font-size: 0.67rem;
}

body[data-view="stats"] .bar-h-track {
    background: var(--paper-deep);
}

body[data-view="stats"] .stat-list {
    border-top: 1px solid var(--border-color);
}

body[data-view="stats"] .stat-list-item {
    padding: 13px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.76rem;
}

body[data-view="stats"] .stat-list-item span:last-child {
    font-family: var(--font-book);
    font-size: 1rem;
    color: var(--text-main);
}

body[data-view="stats"] .recent-list {
    border-top: 1px solid var(--border-color);
}

body[data-view="stats"] .recent-item {
    padding: 15px 0 15px 14px;
    border-bottom: 1px solid var(--border-color);
}

body[data-view="stats"] .recent-title {
    font-size: 0.94rem;
    margin-bottom: 4px;
}

body[data-view="stats"] .recent-meta {
    font-size: 0.67rem;
    color: var(--muted);
}

@media (max-width: 767px) {
    body[data-view="library"] .lib-entry {
        padding-left: 28px !important;
    }

    body[data-view="stats"] .stats-header {
        padding-top: 10px;
    }

    body[data-view="stats"] .chart-container {
        margin-bottom: 44px;
    }
}


/* =========================================================
   Reading Room — Weekly Ledger
   ========================================================= */

body[data-view="week"] .week-editorial-head {
    padding: 20px 0 27px;
    border-bottom: 1px solid var(--border-color);
}

.week-editorial-kicker {
    color: var(--accent-red);
    font-size: 0.61rem;
    letter-spacing: 0.18em;
    margin-bottom: 11px;
}

.week-editorial-title {
    color: var(--text-main);
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.15;
    margin-bottom: 11px;
}

.week-editorial-note {
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.7;
    max-width: 600px;
}

.week-ledger-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 20px;
    padding: 27px 0 21px;
}

.week-ledger-number {
    font-size: 2.75rem;
    line-height: 0.95;
}

.week-ledger-label {
    margin-top: 7px;
    color: var(--muted);
    font-size: 0.63rem;
    letter-spacing: 0.08em;
}

.week-ledger-count {
    color: var(--muted);
    font-size: 0.68rem;
    letter-spacing: 0.07em;
    padding-bottom: 3px;
}

.week-ledger {
    border-top: 1px solid var(--border-color);
}

.week-ledger-row {
    display: grid;
    grid-template-columns: 43px minmax(0, 1fr) 205px;
    gap: 19px;
    align-items: center;
    padding: 24px 0 25px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: padding 160ms ease, background 160ms ease;
}

.week-ledger-row:hover {
    padding-left: 8px;
    padding-right: 8px;
    background: rgba(255,255,255,0.18);
}

.week-ledger-index {
    color: var(--border-strong);
    font-size: 0.74rem;
    letter-spacing: 0.08em;
    align-self: start;
    padding-top: 2px;
}

.week-ledger-kicker {
    color: var(--accent-red);
    font-size: 0.56rem;
    letter-spacing: 0.16em;
    margin-bottom: 7px;
}

.week-ledger-title {
    font-size: 1.14rem;
    line-height: 1.4;
    margin-bottom: 4px;
}

.week-ledger-author {
    color: var(--text-secondary);
    font-size: 0.71rem;
}

.week-ledger-progress {
    align-self: center;
}

.week-ledger-progress-top {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 0.63rem;
}

.week-ledger-progress-top span:first-child {
    color: var(--accent-red);
}

.week-ledger-line {
    height: 3px;
    background: var(--paper-deep);
}

.week-ledger-line > div {
    height: 100%;
    background: var(--accent-red);
}

.week-ledger-empty .week-ledger-kicker,
.week-ledger-empty .week-ledger-author {
    color: var(--muted);
}

.week-ledger-empty .week-ledger-title {
    color: var(--text-secondary);
}

.week-ledger-arrow {
    justify-self: end;
    color: var(--accent-red);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
}

@media (max-width: 767px) {
    body[data-view="week"] .week-editorial-head {
        padding-top: 15px;
    }

    .week-ledger-head {
        align-items: start;
    }

    .week-ledger-number {
        font-size: 2.3rem;
    }

    .week-ledger-row {
        grid-template-columns: 30px minmax(0, 1fr);
        gap: 11px;
        padding: 19px 0 20px;
    }

    .week-ledger-progress {
        grid-column: 2;
        width: 100%;
        margin-top: 12px;
    }

    .week-ledger-empty .week-ledger-arrow {
        grid-column: 2;
        justify-self: start;
        margin-top: 12px;
    }
}


/* =========================================================
   Reading Room — Category Donut & Settings System
   ========================================================= */

body[data-view="stats"] .category-chart-container {
    margin-top: 4px;
}

.category-donut-wrap {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 44px;
    align-items: center;
    padding: 22px 0 18px;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.category-donut {
    width: 220px;
    aspect-ratio: 1;
    border-radius: 50%;
    position: relative;
}

.category-donut::after {
    content: "";
    position: absolute;
    inset: 0;
    margin: auto;
    width: 68%;
    height: 68%;
    border-radius: 50%;
    background: var(--bg-color);
}

.category-donut-hole {
    position: absolute;
    z-index: 1;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.category-donut-hole strong {
    font-size: 2rem;
    font-weight: 400;
    line-height: 1;
    color: var(--text-main);
}

.category-donut-hole span {
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.62rem;
    letter-spacing: 0.08em;
}

.category-legend {
    width: 100%;
}

.category-legend-item {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    padding: 11px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.71rem;
}

.category-legend-item:first-child {
    border-top: 0;
}

.category-legend-name {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    min-width: 0;
}

.category-swatch {
    width: 8px;
    height: 8px;
    flex: 0 0 auto;
    border-radius: 50%;
}

.category-legend-value {
    color: var(--muted);
    white-space: nowrap;
}

.category-chart-note {
    margin-top: 10px;
    color: var(--muted);
    font-size: 0.61rem;
    line-height: 1.6;
}

/* 设置页：从开发者面板变成个人系统控制台 */
body[data-view="settings"] .app-main {
    padding-top: 20px;
}

.settings-editorial-head {
    padding: 19px 0 28px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.settings-kicker {
    color: var(--accent-red);
    font-size: 0.61rem;
    letter-spacing: 0.18em;
    margin-bottom: 11px;
}

.settings-title {
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.15;
    font-weight: 400;
    margin-bottom: 10px;
}

.settings-intro {
    max-width: 600px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.7;
}

.settings-section {
    margin-bottom: 48px;
}

.settings-section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 20px;
    margin-bottom: 17px;
}

.settings-section-title {
    font-size: 1.15rem;
    font-weight: 400;
    margin-bottom: 5px;
}

.settings-section-note {
    color: var(--muted);
    font-size: 0.65rem;
    line-height: 1.6;
}

.settings-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 22px;
    padding: 17px 0;
    border-top: 1px solid var(--border-color);
}

.settings-row:last-child {
    border-bottom: 1px solid var(--border-color);
}

.settings-label {
    color: var(--text-main);
    font-size: 0.82rem;
}

.settings-desc {
    margin-top: 4px;
    color: var(--muted);
    font-size: 0.65rem;
    line-height: 1.6;
    max-width: 600px;
}

.settings-select {
    min-width: 100px;
    border: 1px solid var(--border-color);
    border-radius: 0;
    background: var(--paper);
    color: var(--text-main);
    padding: 9px 28px 9px 11px;
    font-size: 0.72rem;
    outline: none;
}

.settings-select:focus {
    border-color: var(--border-strong);
}

.settings-toggle {
    position: relative;
    display: inline-flex;
    width: 42px;
    height: 23px;
}

.settings-toggle input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.settings-toggle span {
    position: absolute;
    inset: 0;
    border: 1px solid var(--border-strong);
    border-radius: 23px;
    background: var(--paper-deep);
    cursor: pointer;
    transition: background 150ms ease, border-color 150ms ease;
}

.settings-toggle span::after {
    content: "";
    position: absolute;
    width: 17px;
    height: 17px;
    top: 2px;
    left: 2px;
    background: var(--paper);
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    transition: transform 150ms ease;
}

.settings-toggle input:checked + span {
    background: var(--accent-green);
    border-color: var(--accent-green);
}

.settings-toggle input:checked + span::after {
    transform: translateX(18px);
    border-color: var(--accent-green);
}

.settings-value {
    color: var(--muted);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
}

.settings-info-card {
    display: grid;
    grid-template-columns: 55px minmax(0, 1fr) auto;
    gap: 17px;
    align-items: center;
    padding: 18px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.settings-info-mark {
    color: var(--accent-red);
    font-size: 0.62rem;
    letter-spacing: 0.14em;
}

.settings-status {
    color: var(--accent-green);
    font-size: 0.62rem;
    white-space: nowrap;
}

.settings-data-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.settings-data-card {
    display: flex;
    flex-direction: column;
    padding: 18px 16px 17px 0;
    border-right: 1px solid var(--border-color);
}

.settings-data-card:not(:first-child) {
    padding-left: 16px;
}

.settings-data-card:last-child {
    border-right: 0;
}

.settings-data-number {
    font-size: 2rem;
    line-height: 1;
    margin-bottom: 7px;
}

.settings-data-label {
    color: var(--muted);
    font-size: 0.62rem;
}

.settings-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 14px;
}

.settings-actions .btn-quick {
    border-color: var(--border-color);
}

.settings-token {
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.settings-token-status {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 16px;
    padding: 14px 0;
    color: var(--muted);
    font-size: 0.65rem;
}

.settings-token-status code {
    color: var(--text-main);
    font-size: 0.68rem;
}

.settings-token-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 9px;
    padding: 0 0 17px;
}

.settings-token-actions .search-input {
    min-height: 39px;
    margin: 0 !important;
}

.settings-footer-note {
    padding: 5px 0 38px;
    color: var(--muted);
    font-size: 0.61rem;
    letter-spacing: 0.03em;
}

@media (max-width: 767px) {
    .category-donut-wrap {
        grid-template-columns: 1fr;
        gap: 22px;
    }

    .category-donut {
        width: 190px;
        justify-self: center;
    }

    .settings-row {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 14px;
    }

    .settings-info-card {
        grid-template-columns: 46px minmax(0, 1fr);
    }

    .settings-status {
        grid-column: 2;
        justify-self: start;
    }

    .settings-data-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }

    .settings-data-card {
        padding-right: 9px;
    }

    .settings-data-card:not(:first-child) {
        padding-left: 9px;
    }

    .settings-data-number {
        font-size: 1.55rem;
    }

    .settings-token-actions {
        grid-template-columns: 1fr;
    }

    .settings-token-actions .btn-primary,
    .settings-token-actions .btn-danger {
        width: 100%;
    }
}


/* =========================================================
   Reading Room — Four Seasons
   同一间书房，随窗外季节换光。
   ========================================================= */

html,
body,
.app-nav,
.featured-reading,
.complete-dialog,
.settings-info-card,
.settings-data-card,
.settings-select,
.settings-token {
    transition:
        background-color 420ms ease,
        color 280ms ease,
        border-color 280ms ease,
        box-shadow 420ms ease;
}

body[data-season="spring"] {
    --bg-color: #EEF1E7;
    --paper: #F7F7EE;
    --paper-deep: #E1E7D9;
    --text-main: #273028;
    --text-secondary: #697268;
    --muted: #8E978C;
    --border-color: #CED6C7;
    --border-strong: #AAB6A2;
    --accent-red: #876247;
    --accent-red-soft: rgba(88, 112, 76, 0.11);
    --accent-green: #58704C;
    --shadow-paper: 0 10px 30px rgba(57, 72, 55, 0.06);
}

body[data-season="summer"] {
    --bg-color: #F4F1E5;
    --paper: #FFFDF4;
    --paper-deep: #EAE3CD;
    --text-main: #272923;
    --text-secondary: #6E7066;
    --muted: #96978A;
    --border-color: #D8D1BC;
    --border-strong: #B9AF92;
    --accent-red: #B05E3E;
    --accent-red-soft: rgba(176, 94, 62, 0.10);
    --accent-green: #4E746B;
    --shadow-paper: 0 12px 32px rgba(78, 89, 72, 0.07);
}

body[data-season="autumn"] {
    --bg-color: #F1ECE2;
    --paper: #F8F4EA;
    --paper-deep: #EAE2D3;
    --text-main: #25231F;
    --text-secondary: #777166;
    --muted: #9B9387;
    --border-color: #D4CCBD;
    --border-strong: #B8AE9E;
    --accent-red: #8C4037;
    --accent-red-soft: rgba(140, 64, 55, 0.10);
    --accent-green: #59624F;
    --shadow-paper: 0 10px 30px rgba(55, 46, 35, 0.06);
}

body[data-season="winter"] {
    --bg-color: #EDEFF0;
    --paper: #F7F8F7;
    --paper-deep: #DEE3E4;
    --text-main: #25292B;
    --text-secondary: #6B7376;
    --muted: #939A9B;
    --border-color: #CDD2D3;
    --border-strong: #AAB3B5;
    --accent-red: #7A4D50;
    --accent-red-soft: rgba(91, 94, 103, 0.10);
    --accent-green: #4F6262;
    --shadow-paper: 0 10px 30px rgba(50, 59, 62, 0.06);
}

/* 季节不是换肤：在页眉留一点很轻的季节印记。 */
body[data-season="spring"] .app-title::before { content: "SPRING READING DESK"; }
body[data-season="summer"] .app-title::before { content: "SUMMER READING DESK"; }
body[data-season="autumn"] .app-title::before { content: "AUTUMN READING DESK"; }
body[data-season="winter"] .app-title::before { content: "WINTER READING DESK"; }

.settings-season-section {
    margin-top: -4px;
}

.season-choices {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.season-choice {
    position: relative;
    min-height: 118px;
    padding: 16px 14px 14px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-right: 1px solid var(--border-color);
    cursor: pointer;
    overflow: hidden;
    transition: background-color 180ms ease, color 180ms ease;
}

.season-choice:last-child {
    border-right: 0;
}

.season-choice input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.season-choice::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 3px;
    background: var(--season-choice-accent, var(--border-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 180ms ease;
}

.season-choice:hover {
    background: rgba(255,255,255,0.20);
}

.season-choice.active {
    background: rgba(255,255,255,0.27);
}

.season-choice.active::before {
    transform: scaleX(1);
}

.season-choice:nth-child(1) { --season-choice-accent: #728966; }
.season-choice:nth-child(2) { --season-choice-accent: #7E9E78; }
.season-choice:nth-child(3) { --season-choice-accent: #6C958C; }
.season-choice:nth-child(4) { --season-choice-accent: #8C4037; }
.season-choice:nth-child(5) { --season-choice-accent: #66747A; }

.season-choice-name {
    color: var(--text-main);
    font-size: 0.92rem;
}

.season-choice-note {
    color: var(--muted);
    font-size: 0.6rem;
    letter-spacing: 0.05em;
}

.season-choice.active .season-choice-name {
    color: var(--accent-red);
}

body[data-season="spring"] .featured-reading {
    box-shadow: 0 13px 34px rgba(57, 72, 55, 0.08);
}

body[data-season="summer"] .featured-reading {
    box-shadow: 0 13px 34px rgba(116, 96, 51, 0.07);
}

body[data-season="winter"] .featured-reading {
    box-shadow: 0 13px 34px rgba(50, 59, 62, 0.08);
}

@media (max-width: 767px) {
    .season-choices {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .season-choice {
        min-height: 94px;
        padding: 14px 12px;
    }

    .season-choice:nth-child(2n) {
        border-right: 0;
    }

    .season-choice:nth-child(-n+3) {
        border-bottom: 1px solid var(--border-color);
    }
}


/* =========================================================
   Reading Room — Tiny Details
   小到几乎不会被注意，但会让空间更完整。
   ========================================================= */

.app-header::after {
    content: "✦";
    position: absolute;
    right: 28px;
    bottom: 21px;
    color: var(--accent-red);
    font-family: var(--font-book);
    font-size: 0.78rem;
    opacity: 0.72;
}

body[data-season="spring"] .app-header::after { content: "✿"; }
body[data-season="summer"] .app-header::after { content: "○"; }
body[data-season="autumn"] .app-header::after { content: "❧"; }
body[data-season="winter"] .app-header::after { content: "✧"; }

.app-date::before {
    display: inline-block;
    margin-right: 9px;
    color: var(--accent-green);
    font-size: 0.55rem;
    vertical-align: 1px;
}

body[data-season="spring"] .app-date::before { content: "SPRING"; }
body[data-season="summer"] .app-date::before { content: "SUMMER"; }
body[data-season="autumn"] .app-date::before { content: "AUTUMN"; }
body[data-season="winter"] .app-date::before { content: "WINTER"; }

.app-date::before {
    letter-spacing: 0.14em;
    color: var(--muted);
}

.nav-item {
    position: relative;
}

.nav-item.active::before {
    content: "";
    position: absolute;
    width: 3px;
    height: 3px;
    border-radius: 50%;
    left: 50%;
    top: -5px;
    transform: translateX(-50%);
    background: var(--accent-red);
}

.featured-reading::before {
    content: "";
    position: absolute;
    inset: 9px;
    border: 1px solid rgba(255,255,255,0.32);
    pointer-events: none;
    opacity: 0.55;
}

.featured-reading:active {
    transform: translateY(0);
}

.featured-footer .btn-primary {
    position: relative;
    z-index: 1;
}

.settings-season-section .season-choice:first-child {
    grid-column: span 1;
}

@media (max-width: 767px) {
    .app-header::after {
        right: 20px;
        bottom: 17px;
    }

    .app-date::before {
        margin-right: 7px;
        font-size: 0.52rem;
    }

    .nav-item.active::before {
        top: -4px;
    }

    .featured-reading::before {
        inset: 7px;
    }
}


/* GitHub App 登录 */
.auth-kicker {
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    color: var(--accent-red);
    margin-bottom: 10px;
}
.auth-github-button {
    display: block;
    width: 100%;
    text-align: center;
    padding: 11px 16px;
}
.legacy-auth {
    margin-top: 22px;
    padding-top: 16px;
    border-top: 1px dashed var(--border-color);
    color: var(--text-secondary);
    font-size: 0.82rem;
}
.legacy-auth summary {
    cursor: pointer;
    color: var(--text-secondary);
}
.legacy-auth p {
    margin: 12px 0;
    line-height: 1.5;
}


.settings-privacy-note {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px dashed var(--border-color);
    color: var(--text-secondary);
    font-size: 0.78rem;
    line-height: 1.6;
}
.settings-privacy-note strong {
    color: var(--text-main);
    font-weight: 500;
}
.settings-privacy-note code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    color: var(--text-main);
}


/* 在线添加书籍 */
.library-heading-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 4px;
}
.library-heading-row .section-title {
    margin-top: 18px;
}
.library-add-button {
    flex: 0 0 auto;
    margin-top: 12px;
    white-space: nowrap;
}
.add-book-dialog {
    width: min(92vw, 560px);
    max-height: 88vh;
    overflow-y: auto;
    padding: 30px;
    background: var(--paper);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(55, 46, 35, 0.12);
}
.add-book-heading {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 500;
    margin-bottom: 8px;
}
.add-book-intro {
    color: var(--text-secondary);
    font-size: 0.86rem;
    line-height: 1.7;
    margin-bottom: 26px;
}
.add-book-field {
    margin-bottom: 22px;
}
.add-book-field > label,
.add-book-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-secondary);
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}
.add-book-label span {
    color: var(--muted);
    letter-spacing: 0;
    margin-left: 5px;
}
.add-book-dialog .search-input {
    background: transparent;
}
.add-book-dialog select.search-input {
    width: 100%;
}
.reason-chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.reason-chip {
    appearance: none;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    padding: 7px 10px;
    border-radius: 1px;
    cursor: pointer;
    font-family: var(--font-ui);
    font-size: 0.82rem;
    transition: all 160ms ease;
}
.reason-chip:hover,
.reason-chip.selected {
    border-color: var(--accent-red);
    color: var(--accent-red);
    background: var(--accent-red-soft);
}
.add-book-status {
    min-height: 24px;
    color: var(--accent-red);
    font-size: 0.82rem;
    line-height: 1.6;
}
.add-book-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    padding-top: 4px;
}
.add-book-actions .btn-primary,
.add-book-actions .btn-quick {
    flex: 0 0 auto;
}
.add-book-cancel {
    margin-left: auto;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-ui);
    padding: 9px 6px;
}
.book-reason-note {
    display: block;
    margin-top: 10px;
    color: var(--muted);
    font-size: 0.74rem;
    letter-spacing: 0.02em;
}
.detail-reason-block {
    margin: -2px 0 30px;
    padding-left: 14px;
    border-left: 2px solid var(--border-strong);
}
.detail-reason-label {
    color: var(--text-secondary);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}
.detail-reason-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}
.detail-reason-tag {
    border: 1px solid var(--border-color);
    padding: 4px 8px;
    font-size: 0.76rem;
    color: var(--text-main);
    background: rgba(255,255,255,0.2);
}

@media (max-width: 640px) {
    .library-heading-row {
        align-items: flex-end;
    }
    .library-add-button {
        padding: 8px 11px;
        font-size: 0.82rem;
    }
    .add-book-dialog {
        padding: 24px 20px;
    }
    .add-book-cancel {
        margin-left: 0;
        width: 100%;
        text-align: left;
        padding-left: 0;
    }
}