:root{--bg:#0f1115;--panel:#161a22;--text:#e8eaed;--muted:#9aa0a6;--accent:#F7B731;--accent-2:#ffd166;--border:#2a2f39;--radius:12px;--shadow:0 8px 24px rgba(0,0,0,.35);--header-h:44px;--side-w:60px;color-scheme:dark}
html{color-scheme:dark light}
img{color-profile:srgb}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent-2);text-decoration:none}
a:hover{text-decoration:underline}

/* -------- Thin top header (always fixed) -------- */
header.doc-head{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 14px;
  background:linear-gradient(180deg,#12151b,#0f1115);
  border-bottom:1px solid var(--border);
}
body{padding-top:var(--header-h)}
header.doc-head h1{
  font-size:.95rem;color:var(--accent-2);font-weight:600;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:0;
}
header.doc-head .meta{display:flex;gap:12px;font-size:.72rem;color:var(--muted);flex-shrink:0}
header.doc-head .meta span{white-space:nowrap}
header.doc-head .tools{display:flex;gap:6px;flex-shrink:0}
header.doc-head .tools button{
  background:rgba(255,255,255,.08);border:1px solid var(--border);color:var(--text);
  padding:4px 10px;border-radius:6px;font-size:.72rem;cursor:pointer;
}
header.doc-head .tools button:hover{background:var(--accent);color:#111}
header.doc-head .page-strip{display:flex;gap:4px;overflow-x:auto;overflow-y:hidden;flex:1;margin:0 10px;scrollbar-width:thin}
header.doc-head .page-strip button{
  background:var(--panel);border:1px solid var(--border);color:var(--text);
  min-width:30px;height:28px;padding:0 8px;border-radius:5px;font-size:.72rem;cursor:pointer;flex-shrink:0;
}
header.doc-head .page-strip button.active{background:var(--accent);color:#111;font-weight:700}
header.doc-head .page-strip button:hover{background:var(--accent);color:#111}

/* -------- Reader layout -------- */
.reader{display:flex;min-height:calc(100vh - var(--header-h))}
.side{
  width:var(--side-w);flex-shrink:0;background:#0b0e13;border-right:1px solid var(--border);
  display:flex;flex-direction:column;padding:8px 6px;gap:6px;overflow-y:auto;
  position:sticky;top:var(--header-h);align-self:flex-start;
  max-height:calc(100vh - var(--header-h));
}
.side.right{border-right:0;border-left:1px solid var(--border)}
.side button.cur{background:var(--accent);color:#111;font-weight:700;box-shadow:0 0 8px rgba(247,183,49,.6)}
.side h4{font-size:.6rem;color:var(--muted);text-align:center;text-transform:uppercase;letter-spacing:.5px;margin:2px 0 4px}
.side button{
  background:var(--panel);border:1px solid var(--border);color:var(--text);
  padding:6px 0;border-radius:6px;font-size:.7rem;cursor:pointer;text-align:center;
}
.side button.active{background:var(--accent);color:#111;font-weight:700}
.side button:hover{background:var(--accent);color:#111}

.page-view{
  flex:1;min-width:0;padding:16px;
  display:flex;flex-direction:column;align-items:center;justify-content:flex-start;
}
.page-card{
  background:#fff;color:#111;
  border-radius:10px;box-shadow:var(--shadow);
  width:100%;max-width:960px;
  padding:14px;margin-bottom:14px;
}
.page-card .page-img-wrap{
  width:100%;display:flex;justify-content:center;background:#eaeaea;border-radius:8px;overflow:hidden;
}
.page-card img{max-width:100%;height:auto;cursor:zoom-in;border-radius:8px}
.page-card{position:relative}
.page-card .page-text{
  position:absolute;left:0;top:0;right:0;bottom:0;
  padding:14px;background:transparent;border:0;
  white-space:pre-wrap;word-wrap:break-word;font-size:.95rem;
  color:transparent;user-select:text;-webkit-user-select:text;
  cursor:zoom-in;overflow:visible;pointer-events:auto;z-index:2;
}
.page-card .page-text::selection{background:rgba(247,183,49,.75);color:#111}
.page-card .page-img-wrap{position:relative;z-index:1}
.page-card img{cursor:zoom-in}
.page-card .page-label{font-size:.72rem;color:#777;text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;font-weight:600}
footer.doc-foot{color:var(--muted);font-size:.72rem;text-align:center;padding:16px;border-top:1px solid var(--border)}

/* -------- Thumbnail grid (top of reader) -------- */
.thumb-wrap{max-width:1200px;margin:12px auto 18px;padding:0 16px}
.thumb-wrap h2{color:var(--accent);font-size:.82rem;margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}
.thumb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:6px}
.thumb-grid figure{background:var(--panel);border:1px solid var(--border);border-radius:8px;overflow:hidden;margin:0;cursor:pointer;position:relative;aspect-ratio:1/1.414}
.thumb-grid img{width:100%;height:100%;object-fit:cover;display:block}
.thumb-grid figure:hover{border-color:var(--accent)}
.thumb-grid span{position:absolute;bottom:0;left:0;right:0;background:rgba(0,0,0,.7);color:#fff;font-size:.62rem;padding:2px 4px;text-align:center}

/* -------- Play + Download buttons (JSX-style) -------- */
header.doc-head .tools button#heroPlay{
  display:flex;align-items:center;gap:7px;
  background:linear-gradient(135deg,var(--accent),#ff8c3a);
  color:#111;border-color:var(--accent);font-weight:700;
}
header.doc-head .tools button#heroPlay:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(255,107,0,.4)}
header.doc-head .tools button#heroPlay .play-ico{
  width:0;height:0;border-left:8px solid #111;
  border-top:5px solid transparent;border-bottom:5px solid transparent;display:inline-block;
}
header.doc-head .tools a.tool-link{
  background:rgba(255,255,255,.06);border:1px solid var(--border);color:var(--text);
  padding:4px 10px;border-radius:6px;font-size:.72rem;font-weight:600;
  text-decoration:none;cursor:pointer;display:inline-flex;align-items:center;
}
header.doc-head .tools a.tool-link:hover{background:var(--accent);color:#111;border-color:var(--accent)}

/* -------- Extracted images gallery -------- */
.extract-wrap{max-width:1100px;margin:0 auto 24px;padding:16px}
.extract-wrap h2{color:var(--accent);font-size:1rem;margin-bottom:12px;text-transform:uppercase;letter-spacing:.5px}
.extract-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.extract-grid figure{background:var(--panel);border:1px solid var(--border);border-radius:10px;overflow:hidden;margin:0;cursor:zoom-in;position:relative}
.extract-grid img{width:100%;height:160px;object-fit:cover}
.extract-grid figure:hover img{opacity:.85}

/* -------- Lightbox + slideshow -------- */
.lightbox{display:none;position:fixed;inset:0;background:rgba(0,0,0,.94);z-index:9999;align-items:center;justify-content:center;flex-direction:column}
.lightbox.open{display:flex}
.lightbox img{max-width:100vw;max-height:100vh;object-fit:contain;cursor:grab;user-select:none;transition:transform .15s;touch-action:none}
.lightbox img.dragging{cursor:grabbing;transition:none}
.lb-toolbar{position:absolute;top:14px;right:14px;display:flex;gap:8px;z-index:2;flex-wrap:wrap}
.lb-toolbar.left{left:14px;right:auto}
.lb-btn{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);color:#fff;min-width:44px;height:44px;padding:0 12px;border-radius:24px;font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;backdrop-filter:blur(8px)}
.lb-btn:hover{background:rgba(255,255,255,.28)}
.lb-btn.active{background:var(--accent);color:#111}
.lb-caption{position:absolute;bottom:14px;left:0;right:0;text-align:center;color:#eee;font-size:.9rem;padding:0 14px}
.lb-counter{position:absolute;top:22px;left:50%;transform:translateX(-50%);color:#eee;font-size:.85rem;background:rgba(0,0,0,.5);padding:4px 12px;border-radius:20px}
.to-top{position:fixed;right:16px;bottom:16px;width:44px;height:44px;border-radius:50%;border:0;background:#F7B731;color:#111;font-size:20px;font-weight:700;cursor:pointer;z-index:50;display:none;box-shadow:0 6px 18px rgba(0,0,0,.35)}

/* -------- Responsive -------- */
@media (max-width:800px){
  :root{--side-w:46px}
  header.doc-head h1{font-size:.8rem}
  header.doc-head .meta{display:none}
  .page-card{padding:10px}
}
@media print{
  header.doc-head,.side,.to-top{display:none!important}
  .page-card{page-break-after:always;box-shadow:none;margin:0;border-radius:0;max-width:100%}
  body{background:#fff;color:#000}
}