/* nMedia3 Digital reader -- mobile-first */
:root{
  --bg:#0f1115; --panel:#171a21; --ink:#f4f5f7; --muted:#9aa3b2;
  --brand:#e7402a; --line:#272b34; --maxread:680px;
  --chrome:calc(52px + env(safe-area-inset-top));
}
body.chrome-hidden{--chrome:0px}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
img{max-width:100%;display:block}
a{color:inherit}
code{background:#222;padding:2px 5px;border-radius:4px}

/* ---------------- shelf (index) ---------------- */
.shelf-head{text-align:center;padding:28px 16px 8px}
.shelf-head h1{margin:0;font-weight:800;letter-spacing:1px}
.shelf-head p{margin:4px 0 0;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));
  gap:18px;padding:20px;max-width:1100px;margin:0 auto}
.cover-card{background:var(--panel);border:1px solid var(--line);border-radius:10px;
  overflow:hidden;text-decoration:none;transition:transform .15s,border-color .15s}
.cover-card:hover{transform:translateY(-3px);border-color:var(--brand)}
.cover-card img{aspect-ratio:.77;object-fit:cover;width:100%}
.cover-fallback{aspect-ratio:.77;display:grid;place-items:center;background:#222;padding:10px;text-align:center}
.cover-meta{display:block;padding:10px 12px}
.cover-meta strong{display:block}
.cover-meta em{color:var(--muted);font-style:normal}
.cover-meta small{display:block;color:var(--muted);margin-top:3px}
.notice{max-width:560px;margin:40px auto;background:var(--panel);border:1px solid var(--line);
  border-radius:10px;padding:20px;color:var(--muted);line-height:1.5}

/* ---------------- toolbar ---------------- */
.toolbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:8px;
  padding:8px 12px;background:rgba(15,17,21,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line)}
.toolbar{height:var(--chrome);overflow:hidden;padding-top:calc(8px + env(safe-area-inset-top));transition:height .25s ease,padding .25s ease}
body.chrome-hidden .toolbar{height:0;padding-top:0;padding-bottom:0;border-bottom-color:transparent}
.chrome-reveal{position:fixed;top:0;left:50%;transform:translateX(-50%);z-index:45;display:none;
  background:rgba(15,17,21,.72);color:#fff;border:0;border-radius:0 0 12px 12px;
  padding:3px 26px 5px;font-size:13px;cursor:pointer;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
body.chrome-hidden .chrome-reveal{display:block}
.toolbar .title{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw}
.toolbar .spacer{flex:1}
.btn{background:var(--panel);color:var(--ink);border:1px solid var(--line);
  border-radius:8px;padding:7px 12px;font-size:15px;cursor:pointer;line-height:1}
.btn.ghost{background:transparent;border-color:transparent;font-size:20px;padding:6px 10px}
.mode-toggle{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.mode-toggle .btn{border:0;border-radius:0;background:transparent;padding:7px 14px}
.mode-toggle .btn.active{background:var(--brand);color:#fff}

/* ---------------- TOC ---------------- */
.toc{position:fixed;top:0;right:0;height:100%;width:min(86vw,340px);z-index:50;
  background:var(--panel);border-left:1px solid var(--line);overflow:auto;
  transform:translateX(100%);transition:transform .22s ease}
.toc.open{transform:none}
.toc h3{margin:0;padding:16px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:1px}
.toc a{display:block;padding:12px 16px;text-decoration:none;border-bottom:1px solid var(--line)}
.toc a small{color:var(--muted)}
.toc a.ad{color:var(--muted);font-style:italic}
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:40}

/* ---------------- text / scroll view ---------------- */
.text-view{max-width:var(--maxread);margin:0 auto;padding:8px 18px 120px}
.tv-nav{display:flex;align-items:center;gap:10px;padding:12px 0}
.tv-nav .btn{white-space:nowrap}
.tv-nav .btn[disabled]{opacity:.35;cursor:default}
.tv-navlabel{flex:1;text-align:center;color:var(--muted);font-size:.85rem}
.tv-article{padding:26px 0;border-bottom:1px solid var(--line)}
.tv-article.ad{text-align:center}
.tv-kicker{color:var(--brand);font-weight:700;text-transform:uppercase;letter-spacing:1.5px;font-size:12px;margin-bottom:6px}
.tv-h{font-size:clamp(24px,6vw,38px);line-height:1.12;margin:.1em 0 .35em;font-weight:800}
.tv-sub{font-size:1.15rem;color:var(--muted);font-weight:600;margin:1.2em 0 .3em}
.tv-p{font-size:1.06rem;line-height:1.7;margin:0 0 1em}
.tv-img{margin:1.2em 0;border-radius:8px;overflow:hidden}
.tv-img img{width:100%}
.tv-caption{font-style:italic;color:var(--muted);font-size:.95rem;line-height:1.5;margin:.1em 0 1.2em}
.tv-byline{color:var(--muted);font-size:.95rem;line-height:1.45;margin:.2em 0 1.1em;white-space:pre-line}
/* Read view rendered as a light "page": black text on white */
.text-view{background:#fff;color:#1b1b1b;min-height:calc(100vh - var(--chrome))}
.text-view .tv-sub{color:#333}
.text-view .tv-meta,.text-view .tv-caption,.text-view .tv-navlabel,.text-view .tv-byline{color:#5a5a5a}
.text-view .tv-nav .btn{background:#fff;color:#1b1b1b;border:1px solid #cfcfcf}
.text-view .tv-nav .btn[disabled]{opacity:.4}
.tv-empty{padding:48px 20px;text-align:center;color:#666;line-height:1.6;max-width:var(--maxread);margin:0 auto}
.tv-ad img{border-radius:10px;border:1px solid var(--line)}
.tv-meta{color:var(--muted);font-size:.85rem;margin-top:8px}

/* ---------------- flip view ---------------- */
.flip-view{position:relative;display:flex;align-items:center;justify-content:center;
  min-height:calc(100vh - var(--chrome));padding:10px}
.flip-stage{
  width:auto;
  aspect-ratio:var(--book-ar, 1.5454);
  height:min(calc(100vh - var(--chrome) - 12px), calc((100vw - 24px) / var(--book-ar, 1.5454)));
}
@media (orientation: portrait){
  .flip-stage{
    aspect-ratio:var(--par, 0.7727);
    height:min(calc(100vh - var(--chrome) - 6px), calc((100vw - 12px) / var(--par, 0.7727)));
  }
}
.stf__parent{margin:0 auto}
.flip-view .nav{position:absolute;top:50%;transform:translateY(-50%);z-index:10;
  background:rgba(0,0,0,.4);border:0;color:#fff;font-size:34px;width:48px;height:64px;
  border-radius:8px;cursor:pointer}
.flip-view .prev{left:6px}.flip-view .next{right:6px}
.flip-progress{position:absolute;bottom:10px;left:50%;transform:translateX(-50%);
  display:flex;align-items:center;gap:10px;background:rgba(0,0,0,.45);padding:8px 14px;border-radius:20px}
.flip-progress input{width:46vw;max-width:380px}
.flip-progress span{color:var(--muted);font-size:13px;min-width:54px;text-align:right}
.page-img{width:100%;height:100%;object-fit:contain;background:#fff}
.hotspot{position:absolute;display:block}

.loader{position:fixed;inset:0;display:grid;place-items:center;color:var(--muted);
  background:var(--bg);z-index:60}
.loader.hide{display:none}

@media(min-width:900px){
  .toolbar .title{max-width:none}
}