/* ==========================================================================
   阅读器 PWA —— 样式
   1. 基础变量与主题      2. 通用组件      3. 底部标签栏与页面
   4. 书架 / 书源 / 搜索 / 我的   5. 阅读器（含分页）
   ========================================================================== */

/* ------------------------------ 1. 变量与主题 ------------------------------ */
:root {
  --bg: #f2f3f5;
  --bg-elev: #ffffff;
  --card: #ffffff;
  --text: #1b1b1f;
  --text-2: #6b6b73;
  --text-3: #9a9aa2;
  --line: rgba(0, 0, 0, .08);
  --line-strong: rgba(0, 0, 0, .14);
  --accent: #a8663c;
  --accent-soft: rgba(168, 102, 60, .12);
  --danger: #d14b4b;
  --success: #2f9e6c;
  --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .06);
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html[data-theme="dark"] {
  --bg: #161618;
  --bg-elev: #1f1f22;
  --card: #232327;
  --text: #ececef;
  --text-2: #a1a1a8;
  --text-3: #74747c;
  --line: rgba(255, 255, 255, .1);
  --line-strong: rgba(255, 255, 255, .18);
  --accent: #e0a06b;
  --accent-soft: rgba(224, 160, 107, .16);
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "SF Pro SC", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  overscroll-behavior-y: none;
}

body { user-select: none; -webkit-user-select: none; }
input, textarea { user-select: text; -webkit-user-select: text; }

.hidden { display: none !important; }
.grow { flex: 1; }
.muted { color: var(--text-2); font-size: 13px; }
.safe-top { padding-top: calc(var(--safe-top) + 8px); }
.safe-bottom { padding-bottom: var(--safe-bottom); }

/* ------------------------------- 2. 通用组件 ------------------------------- */
.icon-btn {
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 17px;
  padding: 6px 8px;
  border-radius: 10px;
  cursor: pointer;
}
.icon-btn:active { background: var(--line); }

.chip {
  border: 1px solid var(--line-strong);
  background: var(--bg-elev);
  color: var(--text-2);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12.5px;
  cursor: pointer;
  white-space: nowrap;
}
.chip:active { opacity: .7; }
.chip.active { background: var(--accent-soft); color: var(--accent); border-color: transparent; }

.btn {
  border: 0;
  background: var(--bg-elev);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 9px 14px;
  font-size: 14.5px;
  cursor: pointer;
  border: 1px solid var(--line);
}
.btn-primary { background: var(--accent); color: #fff; border-color: transparent; }
.btn-danger { background: var(--danger); color: #fff; border-color: transparent; }
.btn:active { opacity: .8; }
.btn-block { width: 100%; }

.input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 9px 12px;
  font-size: 14.5px;
  outline: none;
  font-family: inherit;
}
.input:focus { border-color: var(--accent); }
.textarea { resize: vertical; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12.5px; line-height: 1.5; }

.switch { position: relative; width: 46px; height: 28px; flex: 0 0 auto; }
.switch input { opacity: 0; width: 100%; height: 100%; margin: 0; position: absolute; z-index: 2; cursor: pointer; }
.switch span {
  position: absolute; inset: 0; border-radius: 999px; background: #d8d8dd; transition: background .22s;
  pointer-events: none;
}
.switch span::after {
  content: ''; position: absolute; top: 2px; left: 2px; width: 24px; height: 24px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.25); transition: transform .22s;
}
.switch input:checked + span { background: #34c759; }
.switch input:checked + span::after { transform: translateX(18px); }

.empty-state { padding: 60px 20px; text-align: center; color: var(--text-3); }
.empty-icon { font-size: 40px; margin-bottom: 10px; }
.empty-text { font-size: 14px; }

.toast-box {
  position: fixed; left: 0; right: 0; bottom: calc(var(--safe-bottom) + 70px);
  display: flex; flex-direction: column; align-items: center; gap: 8px; z-index: 3000; pointer-events: none;
}
.toast {
  background: rgba(28, 28, 30, .92); color: #fff; padding: 9px 16px; border-radius: 999px;
  font-size: 13.5px; max-width: 82vw; opacity: 0; transform: translateY(8px); transition: all .25s;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast-success { background: rgba(47, 158, 108, .95); }
.toast-error { background: rgba(209, 75, 75, .95); }
.toast-warn { background: rgba(198, 132, 40, .95); }

/* host 只是一个容器：必须 pointer-events:none，否则弹窗关闭后它会透明地盖住整屏吃掉所有点击 */
.modal-host { position: fixed; inset: 0; z-index: 2500; pointer-events: none; }
.modal-mask {
  position: absolute; inset: 0; background: rgba(0, 0, 0, .45);
  display: flex; align-items: flex-end; justify-content: center; opacity: 0; transition: opacity .2s;
  pointer-events: auto;
}
.modal-mask.show { opacity: 1; }
.card {
  background: var(--bg-elev); border-radius: var(--r-lg); box-shadow: var(--shadow);
  width: min(520px, 100%); margin: 12px; padding: 18px; margin-bottom: calc(12px + var(--safe-bottom));
  transform: translateY(20px); transition: transform .22s;
}
.modal-mask.show .card { transform: translateY(0); }
.modal-title { margin: 0 0 10px; font-size: 16.5px; font-weight: 600; }
.modal-msg { margin: 0 0 16px; color: var(--text-2); font-size: 14px; line-height: 1.6; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }
.modal-actions .btn { min-width: 84px; text-align: center; }

.sheet {
  background: var(--bg-elev); border-radius: var(--r-lg) var(--r-lg) 0 0; width: min(520px, 100%);
  margin-top: auto; padding-bottom: var(--safe-bottom); transform: translateY(24px); transition: transform .22s;
}
.modal-mask.show .sheet { transform: translateY(0); }
.sheet-title { padding: 14px; text-align: center; color: var(--text-2); font-size: 13px; border-bottom: 1px solid var(--line); }
.sheet-item { border: 0; background: none; width: 100%; padding: 15px; font-size: 16px; color: var(--text); cursor: pointer; }
.sheet-item:active { background: var(--line); }
.sheet-item.danger { color: var(--danger); }
.sheet-item.selected { color: var(--accent); }
.sheet-gap { height: 8px; background: var(--bg); border-top: 1px solid var(--line); }

/* ---------------------------- 3. 页面与标签栏 ---------------------------- */
#app { position: fixed; inset: 0; overflow: hidden; }
.page {
  position: absolute; inset: 0; bottom: 0; display: none; flex-direction: column;
  padding-bottom: calc(56px + var(--safe-bottom));
}
.page.active { display: flex; }

.nav-bar {
  display: flex; align-items: center; gap: 8px; padding: 0 14px 10px;
  background: var(--bg); border-bottom: 1px solid var(--line); z-index: 5;
}
.nav-title { margin: 0; font-size: 20px; font-weight: 600; flex: 1; }
.nav-actions { display: flex; gap: 2px; }

.scroll-area { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior-y: contain; }

.search-bar { display: flex; gap: 8px; align-items: center; padding: 10px 14px; }
.search-bar.wide { padding: 0; flex: 1; }
.search-input { flex: 1; }

.tabbar {
  position: absolute; bottom: 0; left: 0; right: 0; height: calc(56px + var(--safe-bottom));
  display: flex; background: var(--bg-elev); border-top: 1px solid var(--line); z-index: 10;
  backdrop-filter: saturate(180%) blur(20px);
}
.tab {
  flex: 1; border: 0; background: none; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 2px; color: var(--text-3); font-size: 11px; cursor: pointer;
  padding-bottom: var(--safe-bottom);
}
.tab.active { color: var(--accent); }
.tab-icon { font-size: 21px; line-height: 1; }

/* ------------------------------- 4. 各页面 ------------------------------- */
.shelf-toolbar { display: flex; align-items: center; gap: 8px; padding: 12px 14px 4px; }

.shelf-list.list { padding: 6px 12px 20px; }
.shelf-list.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px 10px; padding: 10px 14px 20px; }

.book-row {
  display: flex; gap: 12px; align-items: center; padding: 10px; border-radius: var(--r-md);
  background: var(--card); margin-bottom: 8px; cursor: pointer; box-shadow: var(--shadow);
}
.book-row:active { opacity: .85; }
.book-row .cover {
  width: 46px; height: 64px; border-radius: 4px; object-fit: cover; background: var(--bg);
  flex: 0 0 auto; box-shadow: 0 1px 3px rgba(0,0,0,.15);
}
.book-row .info { flex: 1; min-width: 0; }
.book-row .name { font-size: 15.5px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.book-row .meta { color: var(--text-2); font-size: 12.5px; margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.book-row .last { color: var(--text-3); font-size: 12px; margin-top: 5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.book-row .badge {
  min-width: 18px; height: 18px; border-radius: 9px; background: var(--danger); color: #fff;
  font-size: 11px; display: inline-flex; align-items: center; justify-content: center; padding: 0 5px; margin-left: 6px;
}

.book-card { cursor: pointer; text-align: center; }
.book-card .cover {
  width: 100%; aspect-ratio: 3/4; object-fit: cover; border-radius: 6px; background: var(--bg);
  box-shadow: 0 2px 8px rgba(0,0,0,.16);
}
.book-card .name { font-size: 13px; margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.book-card .cover-ph { display: flex; align-items: center; justify-content: center; font-size: 13px; color: #fff; background: linear-gradient(135deg, #b98b5e, #8a5a34); }

.source-list { padding: 6px 12px 24px; }
.source-group-title { padding: 12px 4px 6px; font-size: 13px; color: var(--text-2); font-weight: 600; }
.source-row {
  display: flex; align-items: center; gap: 10px; padding: 12px; background: var(--card);
  border-radius: var(--r-md); margin-bottom: 8px; box-shadow: var(--shadow);
}
.source-row .info { flex: 1; min-width: 0; }
.source-row .name { font-size: 14.5px; }
.source-row .host { font-size: 12px; color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.source-row.off { opacity: .5; }
.row-actions { display: flex; gap: 6px; }

.search-result { padding: 4px 12px 24px; }
.result-row { display: flex; gap: 12px; padding: 12px; background: var(--card); border-radius: var(--r-md); margin-bottom: 8px; box-shadow: var(--shadow); cursor: pointer; }
.result-row .cover { width: 52px; height: 72px; object-fit: cover; border-radius: 4px; background: var(--bg); flex: 0 0 auto; }
.result-row .info { flex: 1; min-width: 0; }
.result-row .name { font-size: 15.5px; }
.result-row .desc { color: var(--text-2); font-size: 12.5px; margin-top: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.result-row .src { color: var(--text-3); font-size: 11.5px; margin-top: 6px; }

.me-content { padding: 12px; }
.me-section { margin-bottom: 14px; }
.me-section-title { font-size: 12.5px; color: var(--text-2); margin: 8px 6px 6px; }
.me-card { background: var(--card); border-radius: var(--r-md); overflow: hidden; box-shadow: var(--shadow); }
.me-row { display: flex; align-items: center; gap: 10px; padding: 14px; border-bottom: 1px solid var(--line); }
.me-row:last-child { border-bottom: 0; }
.me-row .label { flex: 1; font-size: 14.5px; }
.me-row .value { color: var(--text-3); font-size: 13px; }
.me-row.tap { cursor: pointer; }
.me-row.tap:active { background: var(--line); }
.me-note { font-size: 12px; color: var(--text-3); line-height: 1.6; padding: 8px 6px; }

.loading-inline { text-align: center; padding: 24px; color: var(--text-3); font-size: 13px; }
.progress-line { height: 4px; background: var(--line); border-radius: 2px; overflow: hidden; margin: 8px 0; }
.progress-line > i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .2s; }

/* ------------------------------- 5. 阅读器 ------------------------------- */
.reader {
  position: fixed; inset: 0; z-index: 1500; display: flex; flex-direction: column;
  background: var(--r-bg, #f7f1e3); color: var(--r-fg, #2b2b2b);
  transition: background .2s, color .2s;
  overscroll-behavior: none;
}
.reader-scroll {
  flex: 1; overflow: hidden; position: relative;
}
.reader.mode-scroll .reader-scroll { overflow-y: auto; -webkit-overflow-scrolling: touch; }
.reader.mode-page .reader-scroll { overflow: hidden; }

.reader-page {
  padding: 0;
  min-height: 100%;
}
.reader.mode-scroll .reader-page {
  max-width: 640px; margin: 0 auto;
  padding: 18px var(--r-pad, 20px) 60px;
}
.reader.mode-page .reader-page {
  height: 100%;
  column-width: var(--r-col-width, 340px);
  column-gap: var(--r-col-gap, 40px);
  column-fill: auto;
  padding: calc(var(--safe-top) + 34px) var(--r-pad, 20px) calc(var(--safe-bottom) + 34px);
  transform: translateX(0);
  transition: transform .28s cubic-bezier(.22, .61, .36, 1);
  will-change: transform;
}
.reader.mode-page .reader-page.no-anim { transition: none; }

.chapter-title {
  margin: 0 0 18px; font-size: calc(var(--r-font-size, 18px) * 1.15); font-weight: 600;
  line-height: 1.4; letter-spacing: .02em;
}
.chapter-body {
  font-size: var(--r-font-size, 18px);
  line-height: var(--r-line-height, 1.8);
  letter-spacing: var(--r-letter-spacing, 0px);
  text-align: var(--r-align, left);
  font-family: var(--r-font, -apple-system, "PingFang SC", serif);
  font-weight: var(--r-weight, 400);
}
.chapter-body p {
  margin: 0 0 calc(var(--r-para-gap, 1) * 1em);
  text-indent: var(--r-indent, 2em);
}
.chapter-body img {
  max-width: 100%; height: auto; margin: 12px 0; border-radius: 6px; display: block; text-indent: 0;
}

.reader-top {
  position: absolute; top: 0; left: 0; right: 0; display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; color: var(--r-fg); opacity: .75; font-size: 12.5px; pointer-events: none;
}
.reader-top .icon-btn { color: inherit; pointer-events: auto; font-size: 14px; }
.reader-nav-title { flex: 1; text-align: center; opacity: .8; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.reader-status {
  position: absolute; bottom: 0; left: 0; right: 0; display: flex; justify-content: space-between;
  padding: 6px 16px calc(var(--safe-bottom) + 4px); font-size: 12px; color: var(--r-fg); opacity: .55; pointer-events: none;
}

.reader-overlay { position: absolute; inset: 0; z-index: 20; background: rgba(0, 0, 0, .35); }
.reader-overlay.show { animation: fade .2s; }
@keyframes fade { from { opacity: 0 } to { opacity: 1 } }
.reader-bar {
  position: absolute; bottom: 0; left: 0; right: 0; display: flex;
  background: rgba(30, 30, 32, .96); padding: 10px 4px calc(var(--safe-bottom) + 6px);
  color: #fff; backdrop-filter: blur(12px);
}
.r-menu {
  flex: 1; border: 0; background: none; color: #fff; font-size: 13.5px; padding: 8px 4px; cursor: pointer;
  opacity: .92;
}
.r-menu:active { opacity: .6; }
.r-menu.active { color: var(--accent); }

.reader-panel {
  position: absolute; left: 0; right: 0; bottom: calc(52px + var(--safe-bottom));
  background: rgba(30, 30, 32, .97); color: #fff; padding: 14px 16px calc(14px + var(--safe-bottom));
  backdrop-filter: blur(12px);
}
.panel-title { font-size: 13px; opacity: .7; margin-bottom: 10px; }
.panel-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.panel-row .panel-label { width: 52px; font-size: 13px; opacity: .8; flex: 0 0 auto; }
.panel-row input[type=range] { flex: 1; accent-color: var(--accent); }
.panel-value { width: 44px; text-align: right; font-size: 13px; opacity: .8; }

.theme-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.theme-item {
  height: 44px; border-radius: 8px; border: 2px solid transparent; cursor: pointer;
  display: flex; align-items: flex-end; justify-content: center; font-size: 11px; padding-bottom: 4px;
}
.theme-item.active { border-color: var(--accent); }
.font-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.font-chips .chip { color: #fff; background: rgba(255,255,255,.14); border-color: transparent; }
.font-chips .chip.active { background: var(--accent); color: #fff; }
.panel-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.toc-drawer {
  position: absolute; left: 0; bottom: 0; right: 0; top: 0; z-index: 30;
  background: rgba(20, 20, 22, .98); color: #eee; display: flex; flex-direction: column;
  max-width: 420px;
}
.toc-head {
  display: flex; align-items: center; gap: 8px; padding: calc(var(--safe-top) + 12px) 14px 12px;
  border-bottom: 1px solid rgba(255,255,255,.12); font-size: 14px;
}
.toc-body { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 4px 0 20px; }
.toc-item { padding: 12px 16px; font-size: 14px; border-bottom: 1px solid rgba(255,255,255,.06); cursor: pointer; }
.toc-item:active { background: rgba(255,255,255,.08); }
.toc-item.current { color: var(--accent); }
.toc-item.cached::after { content: '·已缓存'; font-size: 11px; opacity: .5; margin-left: 6px; }

.reader-loading {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: var(--r-bg, #f7f1e3); color: var(--r-fg); opacity: .85; font-size: 14px; z-index: 15;
}
.page-tip {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  background: rgba(0,0,0,.72); color: #fff; padding: 8px 14px; border-radius: 8px; font-size: 13px;
  z-index: 40; opacity: 0; transition: opacity .2s; pointer-events: none;
}
.page-tip.show { opacity: 1; }

.chapter-nav { display: flex; gap: 10px; margin-top: 36px; text-indent: 0; }
.chapter-nav-btn {
  flex: 0 0 auto; border: 1px solid var(--line-strong); background: transparent;
  color: inherit; opacity: .72; border-radius: 999px; padding: 10px 16px; font-size: 13.5px;
  cursor: pointer; font-family: inherit;
}
.chapter-nav-btn.grow { flex: 1; opacity: .5; font-size: 12.5px; }
.chapter-nav-btn.primary { opacity: .95; border-color: currentColor; }
.chapter-nav-btn:active { opacity: .5; }
.chapter-nav-btn[disabled] { opacity: .3; }

.reader-flash { position: absolute; inset: 0; background: #000; opacity: 0; pointer-events: none; z-index: 60; transition: opacity .25s; }

@media (prefers-color-scheme: dark) {
  html[data-theme="auto"] { --bg: #161618; --bg-elev: #1f1f22; --card: #232327; --text: #ececef; --text-2: #a1a1a8; --text-3: #74747c; --line: rgba(255,255,255,.1); --line-strong: rgba(255,255,255,.18); --accent: #e0a06b; }
}