/* ============================================================
   Books 阅读站 —— 简洁优雅风（参考博客 landscape 主题）
   配色：浅灰背景 #f6f6f6 / 白卡片 / 正文 #555 / 链接蓝 #258fb8 / 细边框
   ============================================================ */

:root {
  --bg: #f6f6f6;
  --card: #fff;
  --text: #555;
  --text-strong: #333;
  --text-muted: #999;
  --border: #e5e5e5;
  --border-strong: #ddd;
  --link: #258fb8;
  --link-hover: #1e7e9f;
  --link-bg: #eef6f9;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
    sans-serif;
}

* { box-sizing: border-box; }

/* hidden 属性必须优先于 display 声明（否则 display:flex 等会覆盖 hidden，面板初始就显示） */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); }

/* ============================ 顶栏 ============================ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-strong);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .5px;
  white-space: nowrap;
}
.logo:hover { color: var(--link); }

.topbar-controls {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* 搜索框 */
.search {
  height: 34px;
  width: 200px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: 2px;
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.search:focus {
  border-color: var(--link);
  box-shadow: 0 0 0 1px var(--link);
}
.search::placeholder { color: #bbb; }

/* 筛选 chips */
.filters { display: flex; gap: 6px; flex-wrap: wrap; }

.chip {
  height: 30px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: 2px;
  background: var(--card);
  color: var(--text-muted);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.chip:hover { color: var(--link); border-color: var(--link); }
.chip.active {
  color: #fff;
  background: var(--link);
  border-color: var(--link);
}

/* 登录按钮 */
.btn-login {
  height: 32px;
  padding: 0 16px;
  border: 1px solid var(--link);
  border-radius: 2px;
  background: transparent;
  color: var(--link);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.btn-login:hover { background: var(--link); color: #fff; }
.btn-login.on { border-color: var(--border-strong); color: var(--text-muted); background: transparent; }
.btn-login.on:hover { border-color: var(--border-strong); background: transparent; color: var(--text-muted); }

/* ============================ 书架网格 ============================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 26px 22px;
}

.card {
  display: block;
  min-width: 0;
  color: inherit;
}
.card:hover { color: inherit; }

.thumb {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 3px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .06);
  transition: transform .18s, box-shadow .18s;
}
.card:hover .thumb {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
}

.cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.cover.fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 42px;
  font-weight: 600;
}

/* 状态角标 */
.badge {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 2px 8px;
  font-size: 11px;
  line-height: 1.5;
  color: #fff;
  background: rgba(38, 42, 48, .72);
  border-radius: 2px;
  letter-spacing: .5px;
}
.badge.reading { background: rgba(37, 143, 184, .85); }
.badge.finished { background: rgba(104, 159, 56, .85); }
.badge.wishlist { background: rgba(117, 117, 117, .75); }

/* 进度百分比角标 */
.pct {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 2px 6px;
  font-size: 11px;
  line-height: 1.5;
  color: #fff;
  background: rgba(0, 0, 0, .55);
  border-radius: 2px;
}

/* 底部进度条 */
.prog {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: rgba(0, 0, 0, .08);
}
.prog i {
  display: block;
  height: 100%;
  background: var(--link);
}

/* 元信息 */
.meta { padding: 10px 2px 0; }

.meta .title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-all;
  transition: color .15s;
}
.card:hover .meta .title { color: var(--link); }

.meta .author {
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 空状态 */
.empty {
  padding: 90px 20px;
  text-align: center;
  color: var(--text-muted);
}
.empty .empty-sub {
  margin-top: 8px;
  font-size: 13px;
  color: #bbb;
}

/* ============================ 弹窗（登录） ============================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, .45);
}

.modal {
  width: 92%;
  max-width: 340px;
  padding: 24px 24px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, .15);
}

.modal-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-strong);
}
.modal-hint, .modal-sub { margin: 0 0 16px; font-size: 13px; color: var(--text-muted); }

.modal-input {
  width: 100%;
  height: 40px;
  margin-bottom: 10px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: 2px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.modal-input:focus { border-color: var(--link); box-shadow: 0 0 0 1px var(--link); }

.modal-error, .modal-msg {
  margin: 0 0 10px;
  font-size: 12.5px;
  color: #c62828;
  min-height: 18px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
}

/* ============================ 通用按钮 ============================ */
.btn {
  height: 36px;
  padding: 0 18px;
  border: 1px solid var(--link);
  border-radius: 2px;
  background: transparent;
  color: var(--link);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.btn:hover { background: var(--link-bg); }
.btn.primary { background: var(--link); color: #fff; }
.btn.primary:hover { background: var(--link-hover); }

/* ============================ 阅读页 ============================ */
.reader-body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* 顶栏 */
.reader-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 52px;
  padding: 0 14px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  z-index: 30;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: 2px;
  background: transparent;
  color: #666;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.btn-icon:hover { background: var(--link-bg); color: var(--link); }
.btn-icon.on { background: var(--link-bg); color: var(--link); }

.reader-title {
  margin: 0 10px 0 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reader-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.percent { font-size: 12.5px; color: var(--text-muted); min-width: 56px; text-align: right; }

/* 阅读主体 */
.reader-wrap {
  flex: 1;
  display: flex;
  min-height: 0;
  position: relative;
}

.viewer {
  flex: 1;
  min-width: 0;
  position: relative;
  background: var(--card);
}
.viewer iframe { display: block; }

/* 正文主题 */
.theme-sepia .viewer { background: #f5ecd7; }
.theme-night .viewer { background: #1c1f24; }

/* 目录 */
.toc {
  width: 300px;
  flex-shrink: 0;
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.toc-header {
  padding: 14px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toc-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.toc-item {
  display: block;
  width: 100%;
  padding: 9px 12px;
  border: none;
  border-radius: 2px;
  background: transparent;
  color: var(--text);
  font-size: 13.5px;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all .12s;
}
.toc-item:hover { background: var(--link-bg); color: var(--link); }
.toc-item.current { color: var(--link); font-weight: 600; background: var(--link-bg); }
.toc-item.sub { padding-left: 26px; }

/* 书内搜索 */
.reader-search {
  width: 320px;
  flex-shrink: 0;
  background: var(--card);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.search-box { padding: 12px; border-bottom: 1px solid var(--border); }
.search-box input {
  width: 100%;
  height: 36px;
  margin-bottom: 8px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: 2px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  outline: none;
}
.search-box input:focus { border-color: var(--link); box-shadow: 0 0 0 1px var(--link); }

.search-status { padding: 8px 12px 0; font-size: 12.5px; color: var(--text-muted); }
.search-results { flex: 1; overflow-y: auto; padding: 8px; }

.search-result {
  display: block;
  width: 100%;
  margin-bottom: 6px;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: all .12s;
}
.search-result:hover { border-color: var(--link); color: var(--link); }
.search-result .hit { background: #fff3a8; color: inherit; border-radius: 1px; padding: 0 1px; }

/* 排版设置 */
.reader-settings {
  width: 300px;
  flex-shrink: 0;
  background: var(--card);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 8px 16px 20px;
}

.reader-settings h3 {
  margin: 14px 0 4px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: .5px;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 13.5px;
}
.setting-row:last-of-type { border-bottom: none; }
.setting-label { color: var(--text); }

.setting-controls { display: flex; align-items: center; gap: 6px; }
.setting-val { min-width: 38px; text-align: center; font-size: 12.5px; color: var(--text-muted); font-variant-numeric: tabular-nums; }

.seg {
  display: flex;
  gap: 2px;
  padding: 2px;
  background: #f2f2f2;
  border: 1px solid var(--border);
  border-radius: 3px;
}
.seg-btn {
  height: 28px;
  padding: 0 13px;
  border: none;
  border-radius: 2px;
  background: transparent;
  color: var(--text-muted);
  font-size: 12.5px;
  font-family: inherit;
  cursor: pointer;
  transition: all .12s;
  white-space: nowrap;
}
.seg-btn:hover { color: var(--link); }
.seg-btn.active { background: #fff; color: var(--link); font-weight: 600; box-shadow: 0 1px 2px rgba(0,0,0,.08); }

/* 高亮批注气泡 */
.hl-tip {
  position: fixed;
  z-index: 90;
  display: flex;
  gap: 4px;
  padding: 5px 6px;
  background: #262a30;
  border-radius: 3px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .25);
}
.hl-tip button {
  height: 28px;
  padding: 0 10px;
  border: none;
  border-radius: 2px;
  background: transparent;
  color: #fff;
  font-size: 12.5px;
  font-family: inherit;
  cursor: pointer;
}
.hl-tip button:hover { background: rgba(255,255,255,.15); }

/* 正文高亮（用户批注） */
.an-highlight { background: #ffe37a; border-radius: 1px; }
.an-highlight:hover { background: #ffd94a; }

/* 图片预览 */
.img-viewer {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, .82);
}
.img-viewer img {
  max-width: 92vw;
  max-height: 88vh;
  box-shadow: 0 10px 50px rgba(0,0,0,.5);
  border-radius: 2px;
}
.img-viewer-close {
  position: absolute;
  top: 16px;
  right: 20px;
  height: 36px;
  padding: 0 16px;
  border: 1px solid rgba(255,255,255,.6);
  border-radius: 2px;
  background: transparent;
  color: #fff;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}
.img-viewer-close:hover { background: rgba(255,255,255,.15); }

/* ============================ 移动端底栏 ============================ */
.reader-foot {
  display: none;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  padding: 0 12px;
  background: var(--card);
  border-top: 1px solid var(--border);
}

.reader-foot .nav {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: 2px;
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}
.reader-foot .nav:hover { color: var(--link); border-color: var(--link); }
.reader-foot .foot-percent { font-size: 12.5px; color: var(--text-muted); }

/* ============================ 滚动条 ============================ */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: #c9c9c9;
  border: 2px solid transparent;
  background-clip: padding-box;
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover { background: #b3b3b3; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-track { background: transparent; }

/* ============================ 响应式 ============================ */
@media (max-width: 760px) {
  .topbar-inner { height: auto; min-height: 52px; padding: 10px 14px; flex-wrap: wrap; gap: 10px; }
  .topbar-controls { width: 100%; margin-left: 0; }
  .search { width: 100%; }

  .grid { grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 18px 14px; }
  .cover.fallback { font-size: 30px; }
  .meta .title { font-size: 13px; }

  .reader-body { height: 100dvh; }
  .reader-bar { height: 48px; padding: 0 8px; }
  .btn-icon { padding: 0 8px; }
  .reader-title { font-size: 13.5px; max-width: 34vw; }

  .toc, .reader-search, .reader-settings {
    position: absolute;
    top: 48px;
    bottom: 48px;
    width: 82%;
    max-width: 320px;
    box-shadow: 4px 0 20px rgba(0, 0, 0, .12);
    z-index: 25;
  }
  .reader-search { right: 0; border-left: 1px solid var(--border); }
  .reader-settings { right: 0; }

  .reader-foot { display: flex; }
}