/* 小忧的图书室 —— 书架 + 阅读 */

:root{
  --wood:#8a5a3b; --wood-2:#6f4630; --shelf-line:#5d3a26;
  --paper:#faf7f2; --paper-2:#f2ece3; --card:#ffffff;
  --ink:#2f2a25; --ink-soft:#7a6f64; --ink-faint:#a89d90;
  --line:#e6ddd1; --accent:#b5714a; --accent-soft:#e8c9b0;
  --code-bg:#f4efe8; --mark:#ffe9a8;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --serif:"Songti SC","Noto Serif SC",Georgia,"Times New Roman",serif;
  --mono:"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
/* 关键：hidden 属性必须能压过后面写的 display:flex，否则阅读层会永远盖在书架上 */
[hidden]{display:none !important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.75;-webkit-font-smoothing:antialiased}
button{font-family:inherit}
input{font-family:inherit}

/* ══════ 书架 ══════ */
.shelf-view{min-height:100vh;background:
  radial-gradient(circle at 20% 0%,#fdfbf7,transparent 55%),
  linear-gradient(180deg,#fbf8f3,#f4ece1)}
.shelf-top{
  position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  padding:22px clamp(18px,4vw,54px);
  background:color-mix(in srgb,#fbf8f3 86%,transparent);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.shelf-brand{display:flex;align-items:center;gap:13px}
.shelf-logo{font-size:30px}
.shelf-brand h1{margin:0;font-size:clamp(19px,3vw,24px);letter-spacing:-.4px}
.shelf-brand p{margin:2px 0 0;font-size:12.5px;color:var(--ink-soft)}
.shelf-search{position:relative;margin-left:auto;flex:0 1 320px;min-width:180px}
#shelf-search{width:100%;padding:10px 15px;font-size:14px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s}
#shelf-search:focus{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 12%,transparent)}
.sc{position:absolute;right:13px;top:50%;transform:translateY(-50%);font-size:11.5px;color:var(--ink-faint);pointer-events:none}

.shelf-body{padding:34px clamp(16px,4vw,54px) 70px;max-width:1240px;margin:0 auto}

/* 一层书架 */
.shelf-row{margin-bottom:34px}
.row-books{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(146px,1fr));
  gap:clamp(16px,2.4vw,30px);padding:0 clamp(6px,1.5vw,18px) 14px;
  align-items:end;
}
/* 木质隔板 */
.row-plank{
  height:13px;border-radius:4px;
  background:linear-gradient(180deg,#a06a45,#7d4f33 42%,#5f3b26);
  box-shadow:0 8px 18px -6px color-mix(in srgb,#000 34%,transparent),inset 0 1px 0 color-mix(in srgb,#fff 22%,transparent);
  position:relative;
}
.row-plank::after{
  content:"";position:absolute;left:8px;right:8px;bottom:-7px;height:7px;border-radius:0 0 5px 5px;
  background:linear-gradient(180deg,color-mix(in srgb,#000 20%,transparent),transparent);
}

/* 书 */
.book{
  display:flex;flex-direction:column;align-items:center;gap:9px;
  background:none;border:0;padding:0;cursor:pointer;
  transition:transform .2s ease;
}
.book:hover{transform:translateY(-9px)}
.book:hover .cover{box-shadow:0 20px 34px -10px color-mix(in srgb,#000 40%,transparent),0 0 0 3px color-mix(in srgb,var(--bk,#5b7cfa) 34%,transparent)}
.cover{
  position:relative;width:100%;aspect-ratio:3/4.3;border-radius:5px 9px 9px 5px;
  overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;
  padding:16px 13px;
  background:linear-gradient(148deg,var(--bk,#5b7cfa),color-mix(in srgb,var(--bk,#5b7cfa) 56%,#101018));
  box-shadow:0 12px 22px -10px color-mix(in srgb,#000 42%,transparent),inset 0 0 0 1px color-mix(in srgb,#fff 16%,transparent);
  transition:box-shadow .22s ease;
}
/* 书脊高光 */
.cover::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:9px;
  background:linear-gradient(90deg,color-mix(in srgb,#000 30%,transparent),transparent);
}
.cover::after{
  content:"";position:absolute;right:0;top:0;bottom:0;width:12px;
  background:linear-gradient(270deg,color-mix(in srgb,#fff 20%,transparent),transparent);
}
.cv-emoji{font-size:26px;filter:drop-shadow(0 2px 3px color-mix(in srgb,#000 30%,transparent))}
.cv-title{
  font-family:var(--serif);font-weight:800;color:#fff;font-size:15px;line-height:1.35;
  letter-spacing:.5px;text-shadow:0 2px 6px color-mix(in srgb,#000 34%,transparent);
}
.cv-author{font-size:10.5px;color:color-mix(in srgb,#fff 82%,transparent);letter-spacing:.4px}
.book-name{font-size:12.5px;color:var(--ink);font-weight:600;text-align:center;line-height:1.4;max-width:100%;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.book-sub{font-size:11px;color:var(--ink-faint)}
.shelf-empty{text-align:center;color:var(--ink-faint);padding:60px 0}

/* ══════ 阅读 ══════ */
.read-view{position:fixed;inset:0;z-index:40;background:var(--paper);display:flex;flex-direction:column;animation:slide .28s ease}
@keyframes slide{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.read-top{
  display:flex;align-items:center;gap:14px;height:58px;padding:0 16px;flex:none;
  background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
}
.tb-btn{padding:7px 13px;border:1px solid var(--line);border-radius:9px;background:var(--card);color:var(--ink);cursor:pointer;font-size:13px;transition:border-color .16s}
.tb-btn:hover{border-color:var(--accent)}
.read-meta{margin:0 auto;text-align:center;min-width:0}
.read-book{display:block;font-size:13px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52vw}
.read-chap{display:block;font-size:11.5px;color:var(--ink-faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52vw}
.read-progress{height:2px;background:var(--line);flex:none}
#read-bar{height:100%;width:0;background:var(--accent);transition:width .1s}

.read-layout{flex:1;display:flex;min-height:0}

/* 目录 */
.toc{flex:0 0 288px;width:288px;border-right:1px solid var(--line);background:var(--paper-2);display:flex;flex-direction:column;min-height:0}
.toc-head{padding:14px 14px 10px;border-bottom:1px solid var(--line)}
.toc-title{margin:0 0 8px;font-size:13px;font-weight:800}
#toc-search{width:100%;padding:7px 11px;font-size:12.5px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);outline:none}
#toc-search:focus{border-color:var(--accent)}
.toc-list{flex:1;overflow-y:auto;padding:8px 8px 26px}
.toc-group{font-size:11px;color:var(--ink-faint);padding:11px 10px 5px;letter-spacing:.4px;font-weight:700}
.toc-item{display:block;width:100%;padding:7px 10px;margin:1px 0;border:0;border-radius:8px;background:transparent;
  color:var(--ink-soft);cursor:pointer;text-align:left;font-size:12.5px;line-height:1.5;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background .14s,color .14s}
.toc-item:hover{background:color-mix(in srgb,var(--accent) 10%,transparent);color:var(--ink)}
.toc-item.active{background:var(--accent);color:#fff}

/* 书页 */
.page{flex:1;overflow-y:auto;min-width:0;padding:40px 26px 80px;display:flex;flex-direction:column;align-items:center}
.page-inner{
  width:100%;max-width:740px;background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:44px 50px 56px;box-shadow:0 2px 22px color-mix(in srgb,var(--ink) 5%,transparent);
}
.page-inner::before{content:"";display:block;width:44px;height:3px;margin-bottom:22px;background:linear-gradient(90deg,var(--accent),var(--accent-soft));border-radius:2px}
.page-inner h1,.page-inner h2,.page-inner h3,.page-inner h4{font-family:var(--serif);line-height:1.35;letter-spacing:-.2px}
.page-inner h1{font-size:26px;margin:0 0 22px}
.page-inner h2{font-size:21px;margin:38px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.page-inner h3{font-size:17px;margin:26px 0 10px}
.page-inner h4{font-size:15px;margin:20px 0 8px;color:var(--ink-soft)}
.page-inner p{margin:0 0 16px;font-size:16px;line-height:1.95;font-family:var(--serif);text-align:justify}
.page-inner ul,.page-inner ol{margin:0 0 16px;padding-left:24px;font-family:var(--serif);font-size:16px}
.page-inner li{margin:6px 0;line-height:1.9}
.page-inner a{color:var(--accent);text-decoration:none;border-bottom:1px solid var(--accent-soft)}
.page-inner blockquote{margin:18px 0;padding:12px 18px;border-left:3px solid var(--accent-soft);background:var(--paper-2);border-radius:0 10px 10px 0;color:var(--ink-soft)}
.page-inner blockquote p{margin:0;font-size:15px}
.page-inner code{font-family:var(--mono);font-size:13px;background:var(--code-bg);padding:2px 6px;border-radius:5px}
.page-inner pre{margin:18px 0;padding:16px 18px;overflow-x:auto;background:var(--code-bg);border:1px solid var(--line);border-radius:11px;font-size:13px;line-height:1.7}
.page-inner pre code{background:none;padding:0}
.page-inner table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;display:block;overflow-x:auto}
.page-inner th,.page-inner td{border:1px solid var(--line);padding:8px 12px;text-align:left}
.page-inner th{background:var(--paper-2);font-weight:700}
.page-inner img{max-width:100%;border-radius:10px}
.page-inner hr{border:0;border-top:1px solid var(--line);margin:30px 0}
.loading{color:var(--ink-faint);font-size:14px}
.page-nav{display:flex;gap:10px;justify-content:space-between;width:100%;max-width:740px;margin-top:20px}
.pn-btn{padding:9px 16px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink);cursor:pointer;font-size:13px;transition:border-color .16s,transform .12s}
.pn-btn:hover:not(:disabled){border-color:var(--accent);transform:translateY(-1px)}
.pn-btn:disabled{opacity:.36;cursor:not-allowed}
.pn-btn.ghost{color:var(--ink-soft)}
.read-scrim{display:none}

/* 响应式 */
@media (max-width:900px){
  .row-books{grid-template-columns:repeat(auto-fill,minmax(118px,1fr))}
  .cover{padding:12px 10px}
  .cv-title{font-size:13px}
  .cv-emoji{font-size:21px}
  .toc{position:absolute;top:60px;bottom:0;left:0;z-index:5;transform:translateX(-100%);transition:transform .26s ease;box-shadow:0 0 40px color-mix(in srgb,#000 24%,transparent)}
  .toc.open{transform:none}
  .read-scrim.show{display:block;position:absolute;inset:60px 0 0 0;background:color-mix(in srgb,#000 30%,transparent);z-index:4}
  .page{padding:24px 14px 70px}
  .page-inner{padding:28px 20px 38px}
  .page-inner p,.page-inner ul,.page-inner ol{font-size:15.5px}
}
@media (max-width:520px){
  .shelf-top{padding:16px 14px;gap:12px}
  .shelf-search{flex:1 1 100%;margin-left:0}
  .page-inner h1{font-size:22px}
  .page-inner h2{font-size:18px}
}
@media (prefers-reduced-motion:reduce){*{animation-duration:.001ms !important;transition-duration:.001ms !important}html{scroll-behavior:auto}}

/* 🔒 私密书架入口 */
.vault{margin-top:46px}
.vault-inner{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  padding:24px 26px;border:1px dashed color-mix(in srgb,var(--accent) 46%,var(--line));
  border-radius:18px;background:color-mix(in srgb,var(--accent) 6%,var(--card));
  box-shadow:inset 0 0 0 1px color-mix(in srgb,#fff 40%,transparent);
}
.vault-lock{font-size:30px;filter:grayscale(.15)}
.vault-txt{flex:1;min-width:190px}
.vault-txt h2{margin:0 0 5px;font-size:16.5px;letter-spacing:-.2px}
.vault-txt p{margin:0;font-size:13px;color:var(--ink-soft);line-height:1.65}
.vault-btn{
  padding:11px 22px;border-radius:999px;text-decoration:none;
  background:var(--accent);color:#fff;font-size:13.5px;font-weight:700;
  box-shadow:0 10px 20px -8px color-mix(in srgb,var(--accent) 70%,transparent);
  transition:transform .16s,box-shadow .16s;
}
.vault-btn:hover{transform:translateY(-2px);box-shadow:0 14px 26px -8px color-mix(in srgb,var(--accent) 78%,transparent)}

/* 私密区专用 */
.vault-note{margin:0 0 20px;font-size:12.5px;color:var(--ink-soft);
  padding:11px 16px;border-radius:11px;background:color-mix(in srgb,var(--accent) 7%,var(--card));
  border:1px solid color-mix(in srgb,var(--accent) 24%,var(--line))}
.vault-note b{color:var(--accent)}
.vault-back{margin-top:34px;font-size:13px}
.vault-back a{color:var(--accent);text-decoration:none}

/* ══════ 全屏 + 手机阅读手势 ══════ */
.tapzone{display:none}
@media (max-width:900px){
  /* 左右点击热区（不挡文字选择：只占两侧，且 pointer 事件在空白处生效） */
  .tapzone{display:block;position:absolute;top:58px;bottom:0;width:22%;z-index:3}
  .tap-prev{left:0}
  .tap-next{right:0}
  .page{position:relative}
}
/* 沉浸模式：藏掉工具栏和进度条，正文占满 */
body.immersive .read-top{transform:translateY(-100%);opacity:0;pointer-events:none;transition:transform .25s,opacity .25s}
body.immersive .read-progress{opacity:0;transition:opacity .25s}
.read-top{transition:transform .25s,opacity .25s}
/* 全屏时给正文多一点空间 */
body.fs-on .read-layout{padding-bottom:0}
@media (max-width:900px){
  body.fs-on .page{padding:18px 10px 56px}
  body.fs-on .page-inner{padding:22px 16px 30px;border-radius:10px}
}

/* ══════ 🌙 暗夜模式 ══════ */
html[data-theme="dark"]{
  --paper:#17171c; --paper-2:#1f1f26; --card:#24242c;
  --ink:#e6e2dc; --ink-soft:#a49d95; --ink-faint:#726c66;
  --line:#33333d; --accent:#d98d63; --accent-soft:#513a2a;
  --code-bg:#1c1c23; --mark:#5c4a1c;
  --wood:#3a2a20; --wood-2:#291d16;
}
html[data-theme="dark"] body{background:var(--paper);color:var(--ink)}
html[data-theme="dark"] .shelf-view{
  background:radial-gradient(circle at 20% 0%,#20202a,transparent 55%),linear-gradient(180deg,#191920,#141419);
}
html[data-theme="dark"] .shelf-top{background:color-mix(in srgb,#191920 88%,transparent)}
html[data-theme="dark"] .row-plank{
  background:linear-gradient(180deg,#4a3628,#33231a 42%,#241811);
  box-shadow:0 8px 18px -6px color-mix(in srgb,#000 70%,transparent),inset 0 1px 0 color-mix(in srgb,#fff 8%,transparent);
}
html[data-theme="dark"] .cover{box-shadow:0 12px 22px -10px color-mix(in srgb,#000 70%,transparent),inset 0 0 0 1px color-mix(in srgb,#fff 9%,transparent)}
html[data-theme="dark"] .page-inner{box-shadow:0 2px 22px color-mix(in srgb,#000 34%,transparent)}
html[data-theme="dark"] .toc{background:var(--paper-2)}
html[data-theme="dark"] .vault-inner{background:color-mix(in srgb,var(--accent) 10%,var(--card))}
html[data-theme="dark"] .page-inner code,html[data-theme="dark"] .page-inner pre{background:var(--code-bg)}
/* 切主题时全站平滑过渡 */
html,body,.shelf-view,.card,.page-inner,.toc,.cover{transition:background-color .35s ease,color .35s ease,border-color .35s ease}

/* 切换按钮 */
.theme-btn{
  width:38px;height:38px;flex:none;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:50%;cursor:pointer;
  background:color-mix(in srgb,var(--card) 70%,transparent);
  font-size:16px;line-height:1;padding:0;
  transition:border-color .2s,transform .2s;
}
.theme-btn:hover{border-color:var(--accent);transform:rotate(18deg) scale(1.06)}