/* ============================================================
   《提瓦特行记》阅读器样式
   —— 主题 / 字号 / 行距由 html 上的 data-* 属性控制
   ============================================================ */

/* ---------- 主题色板 ---------- */
:root{
  --fs:17px;
  --lh:2.05;
  --paper:#ffffff;
  --bg:#f6f8fb;
  --ink:#23252f;
  --ink-2:#4a4d5c;
  --ink-3:#6b7080;      /* 保持与 --paper >= 4.5:1 */
  --line:#e4e9f0;
  --accent:#2b6cb0;   /* 提瓦特蓝 */
  --gold:#8a5a12;     /* 神之眼金 */
  --bar:rgba(255,255,255,.88);
  --sheet:#ffffff;
}
html[data-theme="sepia"]{
  --paper:#f7f2e4; --bg:#eae2cf; --ink:#3a3226; --ink-2:#5c5240;
  --ink-3:#6f6552; --line:#ded3b9; --accent:#8c6320; --gold:#7a551a; --bar:rgba(247,242,228,.9);
  --sheet:#f7f2e4;
}
html[data-theme="night"]{
  --paper:#131720; --bg:#0b1018; --ink:#d7dbe3; --ink-2:#a8afbe;
  --ink-3:#8b93a5; --line:#252c38; --accent:#7fa8dd; --gold:#d8ab5e; --bar:rgba(19,23,32,.9);
  --sheet:#1a2029;
}
html[data-theme="night"] img{filter:brightness(.86)}

/* 字号档位 */
html[data-fs="1"]{--fs:15px}
html[data-fs="2"]{--fs:16px}
html[data-fs="3"]{--fs:17px}
html[data-fs="4"]{--fs:18.5px}
html[data-fs="5"]{--fs:20px}
/* 行距档位 */
html[data-lh="1"]{--lh:1.85}
html[data-lh="2"]{--lh:2.05}
html[data-lh="3"]{--lh:2.3}

/* ---------- 基础 ---------- */
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth;}
}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Source Han Serif SC","Noto Serif SC","Songti SC","SimSun","STSong",Georgia,serif;
  font-size:var(--fs);line-height:var(--lh);
  -webkit-font-smoothing:antialiased;
  overflow-wrap:break-word;
}

/* ---------- 顶部进度条 ---------- */
#progress{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:70;
  background:var(--accent);transition:width .12s linear;
}

/* ---------- 顶栏 ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:60;height:calc(46px + env(safe-area-inset-top));
  padding-top:env(safe-area-inset-top);
  display:flex;align-items:center;gap:8px;padding-left:10px;padding-right:10px;
  background:var(--bar);border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:13px;
}
.topbar .tb-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-2);}
.tb-btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:36px;min-width:44px;padding:0 9px;border-radius:8px;
  border:1px solid var(--line);background:transparent;color:var(--ink-2);
  font:inherit;font-size:13px;cursor:pointer;text-decoration:none;
}
.tb-btn:hover{border-color:var(--accent);color:var(--accent);}
.tb-btn.icon{font-size:15px;}

/* ---------- 正文容器 ---------- */
.paper{
  max-width:720px;margin:62px auto;background:var(--paper);
  border:1px solid var(--line);border-radius:8px;
  padding:60px 64px 80px;
  box-shadow:0 1px 3px rgba(30,35,60,.05);
}

/* ---------- 章节排版 ---------- */
.vol-tag{
  text-align:center;font-size:calc(var(--fs) * .68);letter-spacing:.18em;
  color:var(--gold);margin:0 0 calc(var(--fs) * .6);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
}
.chapter h1{text-align:center;font-size:calc(var(--fs) * 1.42);letter-spacing:.14em;margin:0 0 8px;font-weight:600;}
.chapter .ch-en{text-align:center;color:var(--ink-3);font-size:calc(var(--fs) * .68);letter-spacing:.28em;
  font-family:Georgia,serif;text-transform:uppercase;margin-bottom:calc(var(--fs) * 2.2);}
.chapter .hr{width:56px;height:2px;background:var(--accent);opacity:.35;margin:0 auto calc(var(--fs) * 2.5);}
p{margin:0 0 1.1em;text-indent:2em;text-align:justify;}
p.no-indent{text-indent:0;}
.hook{text-indent:0;text-align:center;font-size:calc(var(--fs) * 1.28);letter-spacing:.3em;
  margin:0 0 1.6em;font-weight:600;}
.breaks{text-align:center;color:var(--ink-3);letter-spacing:1em;margin:2.2em 0;text-indent:0;font-size:calc(var(--fs) * .78);}
.quote{text-indent:0;margin:1.6em 0;padding:14px 20px;border-left:3px solid var(--line);
  background:var(--paper);background:color-mix(in srgb,var(--accent) 5%,transparent);color:var(--ink-2);
  font-size:calc(var(--fs) * .94);border-radius:0 6px 6px 0;}
.quote p{text-indent:0;margin:0 0 .6em;}
.quote p:last-child{margin-bottom:0;}
.letter{text-indent:0;margin:1.8em 0;padding:22px 26px;border:1px solid var(--line);
  background:var(--paper);background:color-mix(in srgb,var(--accent) 4%,transparent);border-radius:8px;
  font-size:calc(var(--fs) * .92);line-height:1.95;}
.letter p{text-indent:0;margin:0 0 .8em;}
.letter p:last-child{margin-bottom:0;}
.dash-end{text-align:right;text-indent:0;color:var(--ink-2);}

/* ---------- 404 ---------- */
.notfound{text-align:center;}
.notfound h1{font-size:calc(var(--fs) * 1.5);margin:0 0 .8em;}
.notfound p{text-indent:0;text-align:center;color:var(--ink-2);}
.notfound .home-link{display:inline-block;margin-top:.6em;padding:9px 20px;border-radius:9px;
  border:1px solid var(--line);color:var(--accent);text-decoration:none;}

/* ---------- 底部导航 ---------- */
.navbar{
  position:fixed;bottom:0;left:0;right:0;z-index:60;
  display:flex;align-items:stretch;
  background:var(--bar);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  -webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:13px;
}
.navbar a,.navbar button{
  flex:1;display:flex;align-items:center;justify-content:center;
  height:52px;color:var(--ink-2);text-decoration:none;background:none;border:none;
  font:inherit;cursor:pointer;gap:5px;
}
.navbar a:hover,.navbar button:hover{color:var(--accent);}
.navbar .disabled{opacity:.32;pointer-events:none;}
.navbar .mid{flex:1.2;font-weight:500;color:var(--ink);}

/* ---------- 设置面板 ---------- */
.sheet-mask{
  position:fixed;inset:0;z-index:90;background:rgba(10,12,20,.42);
  opacity:0;pointer-events:none;transition:opacity .18s ease;
}
.sheet-mask.on{opacity:1;pointer-events:auto;}
.sheet{
  position:fixed;left:50%;bottom:0;transform:translate(-50%,100%);
  width:min(560px,100%);z-index:91;background:var(--sheet);
  border-radius:16px 16px 0 0;border:1px solid var(--line);border-bottom:none;
  padding:18px 20px calc(22px + env(safe-area-inset-bottom));
  transition:transform .2s ease,visibility .2s;
  visibility:hidden;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
}
.sheet.on{transform:translate(-50%,0);visibility:visible;}
.sheet h3{margin:0 0 14px;font-size:14px;font-weight:500;color:var(--ink-2);}
.sheet .row{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.sheet .row:last-of-type{margin-bottom:0;}
.sheet .lab{width:46px;flex:0 0 auto;font-size:13px;color:var(--ink-3);}
.seg{display:flex;flex:1;gap:6px;}
.seg button{
  flex:1;min-height:44px;padding:0 8px;border-radius:9px;border:1px solid var(--line);background:transparent;
  color:var(--ink-2);font:inherit;font-size:13px;cursor:pointer;
}
.seg button[aria-pressed="true"]{border-color:var(--accent);color:var(--accent);
  background:color-mix(in srgb,var(--accent) 10%,transparent);}

.clear-pos{
  width:100%;min-height:44px;margin-top:4px;border-radius:9px;
  border:1px solid var(--line);background:transparent;color:var(--ink-3);
  font:inherit;font-size:13px;cursor:pointer;
}
.clear-pos:hover{border-color:var(--accent);color:var(--accent);}

/* ---------- 更新提示 ---------- */
.update-toast{
  position:fixed;left:50%;bottom:calc(66px + env(safe-area-inset-bottom));z-index:80;
  transform:translate(-50%,16px);opacity:0;
  display:flex;align-items:center;gap:12px;
  padding:10px 12px 10px 16px;border-radius:999px;
  background:var(--sheet);border:1px solid var(--line);box-shadow:0 8px 26px rgba(20,26,48,.2);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:13px;color:var(--ink-2);
  transition:transform .2s ease,opacity .2s ease;
}
.update-toast.on{transform:translate(-50%,0);opacity:1;}
.update-toast button{
  min-height:32px;padding:0 14px;border-radius:999px;border:1px solid var(--accent);
  background:transparent;color:var(--accent);font:inherit;font-size:13px;cursor:pointer;
}

/* ---------- 首页（封面 + 目录） ---------- */
.home{max-width:720px;margin:0 auto;padding:66px 24px 72px;}
/* 封面：优先用 book.json 的 accent/accent2 渐变（版式设计，非官方美术） */
:root{--accent:#2b6cb0;--accent2:#c9922e;}
.bookcover{padding:28px 0 4px;text-align:center;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;}
.bc-frame{
  position:relative;width:100%;max-width:460px;margin:0 auto;aspect-ratio:2/3;
  border-radius:12px;overflow:hidden;
  background:
    radial-gradient(circle at 50% 84%,rgba(255,236,196,.95) 0%,rgba(255,236,196,0) 44%),
    radial-gradient(circle at 30% 16%,rgba(140,200,255,.34) 0%,rgba(140,200,255,0) 46%),
    linear-gradient(160deg,var(--accent) 0%,color-mix(in srgb,var(--accent) 45%,#101a2e) 52%,#101a2e 100%);
  background-color:#101a2e;
  box-shadow:0 22px 50px rgba(18,26,50,.34);
}
html[data-theme="night"] .bc-frame{filter:brightness(.82);}
.bc-veil{position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,12,26,.80) 0%,rgba(6,12,26,.40) 26%,rgba(6,12,26,.04) 52%,rgba(6,12,26,.12) 72%,rgba(6,12,26,.60) 100%);}
.bc-text{position:absolute;inset:0;padding:34px 26px 28px;display:flex;flex-direction:column;align-items:center;}
.bc-kicker{color:rgba(255,255,255,.76);font-size:11px;letter-spacing:.42em;}
.bc-title{margin:18px 0 0;font-size:38px;line-height:1.26;letter-spacing:.14em;font-weight:600;color:#fff;
  text-shadow:0 2px 18px rgba(0,0,0,.62),0 0 44px rgba(150,200,255,.36);}
.bc-en{margin-top:14px;color:rgba(255,255,255,.62);font-size:10px;letter-spacing:.3em;
  font-family:Georgia,serif;text-transform:uppercase;}
.bc-strip{width:46px;height:2px;margin:18px auto 0;background:linear-gradient(90deg,transparent,#d9b46a,transparent);}
.bc-badge{margin-top:auto;color:rgba(255,255,255,.86);font-size:11.5px;letter-spacing:.3em;
  border:1px solid rgba(255,255,255,.3);border-radius:20px;padding:5px 16px;}
.bc-note{margin-top:14px;font-size:11.5px;color:var(--ink-3);letter-spacing:.04em;}

.toc-head{display:flex;align-items:center;gap:10px;margin:38px 0 6px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;}
.toc-head h2{margin:0;font-size:15px;letter-spacing:.2em;color:var(--ink-3);font-weight:500;flex:0 0 auto;}
.toc-search{flex:1;display:flex;align-items:center;gap:8px;}
.toc-head input{
  flex:1;min-width:0;height:38px;border-radius:9px;border:1px solid var(--line);background:transparent;
  color:var(--ink);font:inherit;font-size:13px;padding:0 12px;outline:none;
}
.toc-head input:focus{border-color:var(--accent);}
.toc-count{font-size:12px;color:var(--ink-3);font-family:Georgia,serif;white-space:nowrap;}
.toc{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;}
.toc .vol{margin:20px 0 6px;font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--gold);}
.toc ol{list-style:none;margin:0;padding:0;}
.toc li a{
  display:flex;align-items:baseline;gap:10px;padding:11px 10px;margin:0 -10px;
  border-radius:9px;color:inherit;text-decoration:none;font-size:14px;transition:background .14s;
}
.toc li a:hover{background:color-mix(in srgb,var(--accent) 9%,transparent);}
.toc li .n{color:var(--ink-3);font-size:12.5px;min-width:2.4em;font-family:Georgia,serif;}
.toc li .t{flex:1;}
.toc li .w{color:var(--ink-3);font-size:11.5px;font-family:Georgia,serif;}
.toc li.hide{display:none;}
.toc-empty{padding:24px 0;color:var(--ink-3);font-size:13px;text-align:center;}
.home-foot{margin-top:44px;padding-top:18px;border-top:1px dashed var(--line);
  font-size:12px;color:var(--ink-3);line-height:1.9;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;}

/* 字号读数 */
.fs-now{font-size:12px;color:var(--ink-3);font-family:Georgia,serif;min-width:3.2em;text-align:right;}

/* 继续阅读 */
.resume{margin:26px 0 0;display:flex;align-items:stretch;gap:8px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;}
.resume[hidden]{display:none;}
.resume a{flex:1;display:flex;align-items:center;gap:10px;padding:13px 16px;border-radius:12px;
  border:1px solid color-mix(in srgb,var(--accent) 40%,transparent);
  background:color-mix(in srgb,var(--accent) 8%,transparent);
  color:var(--ink);text-decoration:none;transition:background .15s;}
.resume a:hover{background:color-mix(in srgb,var(--accent) 15%,transparent);}
.resume .rs-k{flex:0 0 auto;font-size:12px;color:var(--accent);}
.resume .rs-t{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px;}
.resume .rs-p{font-size:12px;color:var(--ink-3);font-family:Georgia,serif;}
.resume .rs-go{color:var(--ink-3);}
.resume-clear{flex:0 0 auto;padding:0 14px;min-height:44px;border-radius:12px;
  border:1px solid var(--line);background:transparent;color:var(--ink-3);
  font:inherit;font-size:12px;cursor:pointer;}
.resume-clear:hover{border-color:var(--accent);color:var(--accent);}

/* 目录：在读章节 */
.toc li.reading a{background:color-mix(in srgb,var(--accent) 12%,transparent);}
.toc li.reading .n{color:var(--accent);font-weight:600;}

/* ---------- 书架（多书入口） ---------- */
.shelf{padding-bottom:72px;}
.shelf-head{text-align:center;padding:26px 0 30px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;}
.shelf-title{margin:14px 0 0;font-size:30px;letter-spacing:.24em;font-weight:600;}
.shelf-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:26px;}

.book-card{display:flex;flex-direction:column;}
/* 封面用 CSS 渐变（版式设计，非官方美术），颜色来自 book.json 的 accent */
.bc-link{display:block;text-decoration:none;color:inherit;}
.book-card .bc-frame{aspect-ratio:2/3;max-width:none;}
.book-card .bc-title{font-size:26px;letter-spacing:.1em;line-height:1.3;}
.book-card .bc-sub{margin-top:12px;font-size:11px;letter-spacing:.2em;color:var(--ink-3);
  text-align:center;font-family:Georgia,serif;text-transform:uppercase;}
.book-card .bc-desc{margin:10px 0 0;font-size:13px;line-height:1.75;color:var(--ink-2);
  text-indent:0;text-align:justify;}
.book-card .bc-meta{margin-top:10px;font-size:11.5px;color:var(--ink-3);text-align:center;
  letter-spacing:.06em;}

/* 书架卡片里的「继续读」 */
.book-card .resume{margin-top:14px;display:flex;}
.book-card .resume[hidden]{display:none;}

/* ---------- 离线下载 ---------- */
.dl-row{display:flex;align-items:center;gap:12px;margin:20px 0 0;flex-wrap:wrap;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;}
.dl-row[hidden]{display:none;}
.dl-btn{min-height:44px;padding:0 20px;border-radius:10px;border:1px solid var(--line);
  background:transparent;color:var(--ink-2);font:inherit;font-size:13px;cursor:pointer;}
.dl-btn:hover{border-color:var(--accent);color:var(--accent);}
.dl-btn[disabled]{opacity:.55;cursor:default;}
.dl-note{font-size:12px;color:var(--ink-3);}
/* 下载结果必须比「进行中」更显眼：152 章要下好一会儿，
   12px 灰字读者看不出有没有在动、跑完了没有。 */
.dl-note.ok{color:var(--accent);font-weight:600;}
.dl-note.err{color:#b3261e;font-weight:600;}
/* 错误色不能只在浅色主题下成立 */
[data-theme="night"] .dl-note.err{color:#f2b8b5;}

/* ---------- 移动端 ---------- */
@media (max-width:760px){
  .paper{margin:0;border:none;border-radius:0;box-shadow:none;
    padding:calc(58px + env(safe-area-inset-top)) 20px 104px;}
  .home{padding:calc(58px + env(safe-area-inset-top)) 16px 96px;}
  .bc-frame{max-width:100%;border-radius:10px;}
  .bc-title{font-size:31px;}
  .bc-text{padding:28px 20px 24px;}
  .toc-head{flex-wrap:wrap;}
  .toc-search{flex:1 1 100%;}
  /* 书架：手机端改双列。2:3 的封面在单列下会占满整屏，一屏只看得到一本书。 */
  .shelf-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
  .book-card .bc-title{font-size:17px;letter-spacing:.06em;}
  .book-card .bc-kicker{font-size:8.5px;letter-spacing:.22em;}
  .book-card .bc-badge{font-size:9.5px;letter-spacing:.16em;padding:3px 9px;}
  .book-card .bc-sub{font-size:9px;letter-spacing:.1em;margin-top:8px;}
  .book-card .bc-desc{display:none;}
  .book-card .bc-meta{font-size:10px;margin-top:6px;}
  .book-card .bc-frame{border-radius:8px;}
  .book-card .resume{padding:9px 11px;gap:7px;}
  .book-card .resume .rs-k{font-size:10.5px;}
  .book-card .resume .rs-t{font-size:12.5px;}
  .book-card .resume .rs-p{font-size:10px;}
  .shelf-title{font-size:24px;}
}

/* ---------- 打印 ---------- */
@page{size:A4;margin:20mm 18mm;}
@media print{
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact;}
  /* 打印永远用浅色变量：否则夜间主题会把浅灰/浅蓝印在白纸上 */
  :root,html[data-theme="sepia"],html[data-theme="night"]{
    --fs:10.5pt;--lh:1.75;
    --paper:#fff;--bg:#fff;--ink:#000;--ink-2:#333;--ink-3:#666;
    --line:#ccc;--accent:#2b6cb0;--gold:#8a5a12;--sheet:#fff;
  }
  html[data-fs="1"],html[data-fs="2"],html[data-fs="3"],
  html[data-fs="4"],html[data-fs="5"]{--fs:10.5pt;}
  html[data-lh="1"],html[data-lh="2"],html[data-lh="3"]{--lh:1.75;}
  html[data-theme="night"] img{filter:none;}
  body{background:#fff;color:#000;font-size:10.5pt;line-height:1.75;}
  .topbar,.navbar,.sheet,.sheet-mask,#progress,.toc-head input,.resume,
  .update-toast,.tb-btn,.toc-search{display:none !important;}
  .paper{max-width:none;margin:0;border:none;border-radius:0;box-shadow:none;padding:0;}
  .home{max-width:none;padding:0;}
  .bookcover{page-break-after:always;}
  .chapter{page-break-before:always;}
  .chapter h1{page-break-after:avoid;break-after:avoid;}
  .quote,.letter,.hook{page-break-inside:avoid;break-inside:avoid;}
  a{color:inherit;text-decoration:none;}
  p{orphans:2;widows:2;}
  .toc li{page-break-inside:avoid;}
  .home-foot{color:#333;}
}