*{box-sizing:border-box}
:root{--ink:#171717;--muted:#6b7280;--line:#e9e9e9;--soft:#f6f6f6}
body{margin:0;background:#f5f6f8;color:var(--ink);font-family:Inter,system-ui,-apple-system,"Segoe UI",Arial,sans-serif}
.topbar{height:72px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(16px,4vw,60px);position:sticky;top:0;z-index:10}
.brand img{display:block;width:auto;height:44px;max-width:180px;object-fit:contain}
.tagline{font-size:13px;font-weight:700;letter-spacing:.08em;color:#777}
.container{width:min(1180px,96%);margin:0 auto;padding:20px 0 40px}
.hero{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:18px}
.eyebrow{font-size:11px;font-weight:800;letter-spacing:.14em;color:#777}
h1{font-size:clamp(24px,4vw,40px);margin:4px 0 2px;letter-spacing:-.03em}
.hero p{margin:0;color:var(--muted);font-size:14px}

.edition-picker{background:#fff;border:1px solid var(--line);padding:10px 14px;border-radius:12px;min-width:220px;box-shadow:0 4px 15px rgba(0,0,0,.03)}
.edition-picker label{display:block;font-size:11px;color:#777;margin-bottom:3px}
select{border:0;background:transparent;width:100%;font-size:15px;font-weight:700;outline:0;cursor:pointer}

.reader-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 10px 30px rgba(0,0,0,.05)}
.reader-head{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;border-bottom:1px solid var(--line);font-size:14px}
.reader-head span{color:#777}
.download{background:#171717;color:#fff;text-decoration:none;padding:8px 14px;border-radius:8px;font-size:13px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:6px}

.toolbar{display:flex;align-items:center;justify-content:center;gap:6px;padding:8px;border-bottom:1px solid var(--line);background:#fafafa;flex-wrap:wrap}
.toolbar button{border:1px solid #ddd;background:#fff;border-radius:8px;padding:7px 11px;font-weight:700;cursor:pointer}
.toolbar button:hover{background:#f1f1f1}
.toolbar span{margin:0 4px;font-size:13px;color:#555}

/* Fixed Viewer Canvas Wrap */
.viewer-wrap{
  position:relative;
  min-height:60vh;
  display:block;
  padding:10px;
  background:#e5e7eb;
  overflow:auto;
  -webkit-overflow-scrolling:touch;
  text-align:center;
}

canvas{
  display:inline-block;
  background:#fff;
  box-shadow:0 8px 24px rgba(0,0,0,.15);
  max-width:none !important;
  height:auto;
}

#loading{position:absolute;top:20px;left:50%;transform:translateX(-50%);background:rgba(20,20,20,.88);color:#fff;padding:8px 16px;border-radius:20px;font-size:13px;z-index:2;box-shadow:0 4px 12px rgba(0,0,0,.2)}

/* Thumbnails Strip */
.thumbs-strip{display:flex;gap:8px;padding:10px 12px;background:#fff;border-top:1px solid var(--line);overflow-x:auto;scroll-behavior:smooth}
.thumb-item{min-width:60px;height:36px;border:1px solid #ddd;border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;cursor:pointer;background:#fafafa;color:#555;flex-shrink:0}
.thumb-item.active{border-color:#171717;background:#171717;color:#fff}

.empty{background:#fff;border:1px solid var(--line);border-radius:18px;padding:50px;text-align:center}
footer{text-align:center;color:#888;font-size:12px;padding:20px;border-top:1px solid var(--line);background:#fff}

/* Mobile Specific UX Enhancements */
@media(max-width:700px){
 .topbar{height:54px;padding:0 12px}
 .brand img{height:32px;max-width:130px}
 .tagline,.desktop-only{display:none}
 .container{width:100%;padding:10px 6px 20px}
 .hero{display:block;margin-bottom:10px}
 h1{font-size:20px;margin:2px 0}
 .hero p{font-size:12px}
 .edition-picker{margin-top:8px;width:100%;padding:8px 12px}
 .reader-card{border-radius:12px;border:none;box-shadow:none}
 .reader-head{padding:10px;font-size:13px}
 .viewer-wrap{min-height:58vh;padding:4px;background:#e2e8f0}
 
 .toolbar{position:sticky;bottom:0;z-index:5;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);padding:6px;gap:4px;border-top:1px solid var(--line);border-bottom:0;box-shadow:0 -4px 15px rgba(0,0,0,.05)}
 .toolbar button{padding:8px 12px;font-size:13px;border-radius:6px}
 .btn-text{display:none}
 .mobile-download-btn{width:100%;text-align:center;padding:12px;font-size:14px;border-radius:8px;margin-top:12px;box-shadow:0 4px 12px rgba(0,0,0,.1)}
}