:root{
  --bg:#faf8f5; --fg:#17150f; --dim:#6b6456; --line:#e3ddd1; --card:#fff;
  --accent:#e25822; --accentfg:#fff; --shadow:0 1px 2px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.05);
  --rsize:19px; --rlh:1.62; --maxw:40rem;
}
body[data-theme=sepia]{--bg:#f4ecd8;--fg:#3b2f1e;--dim:#7a6a4f;--line:#e0d4b8;--card:#fbf5e6}
body[data-theme=dark]{--bg:#101012;--fg:#e8e4dc;--dim:#8e8a82;--line:#26262b;--card:#17171a;
  --shadow:0 1px 2px rgba(0,0,0,.5)}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);
  font:16px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,system-ui,sans-serif;
  overscroll-behavior-y:none;-webkit-text-size-adjust:100%}
a{color:inherit}
#app{padding:env(safe-area-inset-top) env(safe-area-inset-right) 0 env(safe-area-inset-left)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px 120px}
.top{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top)}
.top-in{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:10px;
  padding:10px 14px;min-height:50px}
.top h1{font-size:17px;margin:0;font-weight:650;letter-spacing:-.02em;flex:1;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sub{color:var(--dim);font-size:13px}
button,.btn{font:inherit;border:1px solid var(--line);background:var(--card);color:var(--fg);
  border-radius:11px;padding:9px 13px;cursor:pointer;display:inline-flex;align-items:center;
  gap:7px;justify-content:center;text-decoration:none;font-size:15px}
button:active,.btn:active{transform:scale(.98)}
button.primary,.btn.primary{background:var(--accent);color:var(--accentfg);border-color:transparent;font-weight:600}
button.ghost{background:transparent;border-color:transparent;color:var(--dim);padding:8px}
button.sm{padding:6px 10px;font-size:13px;border-radius:9px}
button:disabled{opacity:.45}
.row{display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.grow{flex:1}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px;
  box-shadow:var(--shadow);margin:12px 0}
.booklist{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.book{display:flex;gap:13px;align-items:center;background:var(--card);border:1px solid var(--line);
  border-radius:16px;padding:12px;box-shadow:var(--shadow)}
.cv{width:50px;height:72px;border-radius:7px;background:linear-gradient(145deg,#2a2622,#4b443a);
  flex:none;object-fit:cover;display:flex;align-items:center;justify-content:center;color:#fff;
  font-size:19px;font-weight:700;overflow:hidden}
.book .t{font-weight:620;letter-spacing:-.01em;line-height:1.25}
.book .m{color:var(--dim);font-size:12.5px;margin-top:3px}
.pill{display:inline-block;font-size:11.5px;padding:2.5px 8px;border-radius:999px;
  border:1px solid var(--line);color:var(--dim);background:var(--bg)}
.pill.on{background:var(--accent);color:#fff;border-color:transparent}
.seg{display:inline-flex;background:var(--line);border-radius:11px;padding:2.5px;gap:2px}
.seg button{border:0;background:transparent;border-radius:9px;padding:6px 13px;font-size:14px;
  color:var(--dim);font-weight:560}
.seg button.on{background:var(--card);color:var(--fg);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.chips{display:flex;gap:7px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:7px 12px;font-size:14px}
.chip.on{background:var(--fg);color:var(--bg);border-color:var(--fg)}
input[type=text],input[type=password],input[type=search],select,textarea{
  font:inherit;width:100%;padding:11px 12px;border-radius:11px;border:1px solid var(--line);
  background:var(--card);color:var(--fg);-webkit-appearance:none}
textarea{min-height:76px;resize:vertical}
label.fld{display:block;margin:12px 0 0}
label.fld .lab{font-size:12.5px;color:var(--dim);margin-bottom:5px;display:block;
  text-transform:uppercase;letter-spacing:.06em;font-weight:620}
.reader{font-size:var(--rsize);line-height:var(--rlh);max-width:var(--maxw);margin:0 auto;
  padding:14px 20px 180px}
body[data-font=serif] .reader{font-family:Charter,Georgia,"Iowan Old Style","Times New Roman",serif}
body[data-font=sans] .reader{font-family:-apple-system,"SF Pro Text",Inter,system-ui,sans-serif}
.reader p{margin:0 0 .95em;hyphens:auto;-webkit-hyphens:auto}
.reader h1,.reader h2,.reader h3{line-height:1.22;letter-spacing:-.02em;margin:1.4em 0 .5em}
.reader h1{font-size:1.45em}.reader h2{font-size:1.25em}.reader h3{font-size:1.1em}
.reader img{max-width:100%;height:auto;border-radius:8px;display:block;margin:1em auto}
.reader blockquote{margin:1em 0;padding-left:1em;border-left:3px solid var(--line);color:var(--dim)}
.reader hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.reader table{width:100%;border-collapse:collapse;font-size:.9em}
.reader td,.reader th{border:1px solid var(--line);padding:5px 7px}
.chtitle{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--dim);
  margin-bottom:6px;font-family:-apple-system,system-ui,sans-serif}
.bar{position:fixed;left:0;right:0;bottom:0;z-index:30;
  background:color-mix(in srgb,var(--bg) 92%,transparent);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-top:1px solid var(--line);padding:8px 14px calc(8px + env(safe-area-inset-bottom))}
.bar-in{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:10px}
.prog{height:3px;background:var(--line);border-radius:2px;overflow:hidden;flex:1}
.prog i{display:block;height:100%;background:var(--accent);width:0;transition:width .3s}
[hidden]{display:none !important}
.sheet{position:fixed;inset:0;z-index:60;background:rgba(0,0,0,.42);display:flex;align-items:flex-end;
  animation:fade .18s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes up{from{transform:translateY(16px)}to{transform:translateY(0)}}
.sheet-body{background:var(--bg);width:100%;max-height:92vh;overflow:auto;border-radius:20px 20px 0 0;
  padding:8px 18px calc(24px + env(safe-area-inset-bottom));margin:0 auto;max-width:34rem;
  animation:up .22s cubic-bezier(.2,.8,.2,1);box-shadow:0 -8px 40px rgba(0,0,0,.2)}
.sheet-body h2{font-size:18px;margin:4px 0 2px;letter-spacing:-.02em}
.grab{width:38px;height:4px;border-radius:2px;background:var(--line);margin:8px auto 10px}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(84px + env(safe-area-inset-bottom));
  background:#17150f;color:#fff;padding:10px 16px;border-radius:999px;font-size:14px;z-index:80;
  max-width:88vw;text-align:center;box-shadow:0 8px 30px rgba(0,0,0,.3)}
.toc{display:flex;flex-direction:column;gap:1px;margin-top:8px}
.toc button{justify-content:space-between;text-align:left;border:0;border-radius:9px;background:transparent;
  padding:11px 10px;width:100%;font-size:15px}
.toc button.on{background:var(--line);font-weight:620}
.toc .n{color:var(--dim);font-size:12px;font-variant-numeric:tabular-nums;flex:none;margin-left:10px}
.empty{text-align:center;color:var(--dim);padding:48px 20px}
.empty .big{font-size:40px;margin-bottom:10px}
.spin{width:15px;height:15px;border:2px solid var(--line);border-top-color:var(--accent);
  border-radius:50%;animation:sp .7s linear infinite;display:inline-block;flex:none}
@keyframes sp{to{transform:rotate(360deg)}}
.err{color:#c0392b;font-size:13px;white-space:pre-wrap;word-break:break-word}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12.5px}
.kv{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border:0}
.kv .k{color:var(--dim)}
.hidden{display:none !important}

/* ---- sign-in screen ---- */
.auth{max-width:21.5rem;margin:0 auto;padding:max(9vh,52px) 22px 48px;text-align:center}
.auth .mark{width:58px;height:58px;border-radius:15px;display:block;margin:0 auto 18px;
  box-shadow:var(--shadow)}
.auth h1{font-size:26px;letter-spacing:-.035em;margin:0 0 7px;font-weight:700}
.auth .tag{color:var(--dim);font-size:14.5px;line-height:1.45;margin:0 0 28px}
.gbtn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;height:50px;
  border:1px solid var(--line);border-radius:13px;background:var(--card);color:var(--fg);
  font-size:16px;font-weight:600;text-decoration:none;box-shadow:var(--shadow)}
.gbtn:active{transform:scale(.99)}
.gmark{display:flex;align-items:center}
.or{display:flex;align-items:center;gap:12px;color:var(--dim);font-size:12.5px;margin:20px 0}
.or:before,.or:after{content:"";flex:1;height:1px;background:var(--line)}
.authform{display:flex;flex-direction:column;gap:9px;text-align:left;margin:0}
.authform input{height:50px;font-size:16px;border-radius:13px;padding:0 15px}
.authform input:focus{outline:none;border-color:var(--fg)}
.authform .go{height:50px;font-size:16px;border-radius:13px;margin-top:3px}
.authlink{width:100%;background:none;border:0;color:var(--dim);font-size:14.5px;padding:12px 0}
.authlink b{color:var(--accent);font-weight:600}
.autherr{color:#c0392b;font-size:13.5px;line-height:1.4;min-height:1px}
.legalfoot{margin-top:24px;color:var(--dim);font-size:12.5px}
.legalfoot a{color:var(--dim);text-decoration:none}