/* অনলাইন বই পড়া */
:root{--green:#123d2f;--green-d:#0c2c21;--gold:#d6b46a;--ink:#f3ead4;--bg:#e9e4d8}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);font:400 15px/1.4 'Hind Siliguri',system-ui,sans-serif}
.l-ar body{font-family:'Noto Naskh Arabic','Hind Siliguri',system-ui,sans-serif}
.rbar{position:fixed;inset:0 0 auto 0;z-index:20;display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:7px 12px;min-height:54px;background:var(--green);color:var(--ink);border-bottom:2px solid var(--gold);box-shadow:0 2px 10px rgba(0,0,0,.18)}
.rbar button,.rbar select,.rbar input,.rb-back,.rb-dl{font:inherit;color:var(--ink);background:rgba(255,255,255,.07);border:1px solid rgba(214,180,106,.35);border-radius:8px;height:36px}
.rbar button{min-width:36px;padding:0 9px;cursor:pointer;font-size:17px;line-height:1}
.rbar button:hover:not(:disabled),.rb-back:hover,.rb-dl:hover{background:rgba(214,180,106,.22);border-color:var(--gold)}
.rbar button:disabled{opacity:.35;cursor:default}
.rbar select{padding:0 6px;cursor:pointer;max-width:130px}
.rbar select option{color:#111;background:#fff}
.rb-back{display:inline-flex;align-items:center;justify-content:center;min-width:38px;text-decoration:none;font-size:19px}
.rb-title{flex:1 1 160px;min-width:0;font-weight:600;font-size:16px;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rb-group{display:flex;align-items:center;gap:5px}
.rb-pages input{width:58px;text-align:center;padding:0 4px}
.rb-of{opacity:.85;white-space:nowrap}
.rb-find input{width:220px;padding:0 10px;background:#fff;color:#1d2622;border-color:transparent}
.rb-find input::placeholder{color:#7a827d}
.rb-msg{min-width:52px;font-size:13px;opacity:.9;white-space:nowrap;text-align:center}
.rb-msg.bad{color:#ffb4a8;opacity:1}
.rb-dl{display:inline-flex;align-items:center;padding:0 12px;text-decoration:none;background:var(--gold);color:var(--green);border-color:var(--gold);font-weight:600}
.rb-dl:hover{background:#e6c886!important;color:var(--green)}
.rb-only-sm{display:none}
#viewerContainer{position:absolute;inset:56px 0 0 0;overflow:auto;outline:none}
.pdfViewer .page{box-shadow:0 2px 14px rgba(0,0,0,.18);border-radius:2px}
.rloading{position:fixed;inset:56px 0 0 0;display:flex;align-items:center;justify-content:center;gap:12px;color:#123d2f;font-size:17px;background:var(--bg);flex-wrap:wrap;padding:20px;text-align:center}
.rloading .rb-dl{height:38px;border:1px solid var(--gold);border-radius:8px}
.spin{width:22px;height:22px;border:3px solid rgba(18,61,47,.2);border-top-color:#123d2f;border-radius:50%;animation:sp 1s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
@media (max-width:900px){
  .rb-find{order:10;flex:1 0 100%;display:none}
  .show-find .rb-find{display:flex}
  .rb-find input{flex:1;width:auto}
  .rb-only-sm{display:inline-block}
  .rb-dl-t,.rb-zoom select{display:none}
  .rb-title{flex-basis:80px;font-size:14.5px}
  .rbar{gap:6px;padding:6px 8px}
}
@media (max-width:520px){ .rb-zoom,#fullscreen{display:none} .rb-pages input{width:46px} }