/* Nada Realistic Flipbook v10 – clean professional reader */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;600;700;800&display=swap');
.nrf-viewer-container{width:100%;max-width:1220px;margin:0 auto;padding:12px 10px}
.nrf-viewer{--brand:#0077C8;--brand2:#0b8ee8;--ink:#172033;--muted:#7a8594;--line:#e4e8ef;--soft:#f6f9fc;--white:#fff;font-family:'Plus Jakarta Sans',system-ui,sans-serif;width:100%;height:86vh;min-height:680px;color:var(--ink);box-sizing:border-box}.nrf-viewer *{box-sizing:border-box}.nrf-shell{width:100%;height:100%;display:flex;flex-direction:column;border-radius:20px;overflow:hidden;background:#fff;box-shadow:0 24px 80px rgba(0,44,90,.16),0 2px 12px rgba(20,30,50,.08);border:1px solid rgba(0,119,200,.08)}
.nrf-topbar{flex:0 0 58px;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 16px;background:linear-gradient(180deg,#fff,#f7fbff);border-bottom:1px solid var(--line);z-index:30}.nrf-brand{display:flex;align-items:center;gap:10px;min-width:150px}.nrf-mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;font-size:14px;box-shadow:0 10px 20px rgba(0,119,200,.22)}.nrf-brand strong{display:block;font-size:13px;font-weight:800;color:#162033;line-height:1.1}.nrf-brand span{display:block;font-size:10px;color:var(--muted);margin-top:2px}.nrf-tools{display:flex;align-items:center;gap:8px}.nrf-tools button,.nrf-dl{height:34px;min-width:38px;border:1px solid #d8e4ef;border-radius:11px;background:#fff;color:#233044;cursor:pointer;display:grid;place-items:center;text-decoration:none;font-weight:800;font-size:13px;box-shadow:0 6px 18px rgba(25,41,70,.08);transition:transform .14s,box-shadow .14s,background .14s,color .14s}.nrf-tools button:hover,.nrf-dl:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(25,41,70,.14);background:#eef7ff;color:var(--brand)}.nrf-tool-panel{background:linear-gradient(135deg,var(--brand),var(--brand2))!important;color:#fff!important;border-color:transparent!important}.nrf-btn-reset{min-width:46px}.nrf-dl{padding:0 12px;background:#10243c;color:#fff;border-color:#10243c}
.nrf-reader{flex:1 1 0;min-height:0;display:flex;align-items:stretch;background:radial-gradient(circle at center,#fff 0,#f4f7fb 54%,#e8edf3 100%);position:relative;overflow:hidden}.nrf-book-area{flex:1;min-width:0;overflow:hidden;display:flex;align-items:center;justify-content:center;padding:34px 76px 28px;cursor:default;position:relative;background:transparent}.nrf-book-inner{display:flex;align-items:center;justify-content:center;width:100%;height:100%;transition:transform .18s ease}.nrf-book{filter:drop-shadow(0 18px 38px rgba(28,42,62,.24));position:relative}.nrf-book:after,.stf__parent:after{content:"";position:absolute;top:3%;bottom:3%;left:50%;width:28px;transform:translateX(-50%);pointer-events:none;z-index:999;background:linear-gradient(90deg,rgba(0,0,0,.18),rgba(255,255,255,.22) 42%,rgba(0,0,0,.16));filter:blur(9px);opacity:.42}.nrf-at-cover .nrf-book:after,.nrf-at-end .nrf-book:after{opacity:0}.nrf-page{background:#fff;overflow:hidden}.nrf-paper{position:relative;width:100%;height:100%;background:#fff}.nrf-paper:after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(0,0,0,.10),transparent 5%,transparent 95%,rgba(0,0,0,.08));opacity:.13}.nrf-paper img{display:block;width:100%;height:100%;object-fit:contain;background:#fff}.nrf-paper em{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) rotate(-28deg);font-size:48px;font-style:normal;font-weight:900;color:rgba(0,119,200,.04);pointer-events:none;white-space:nowrap}.nrf-error{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:#111;color:#fff;border-radius:12px;padding:14px 22px;font-weight:700;box-shadow:0 12px 32px rgba(0,0,0,.28);z-index:20}.nrf-css-fallback{display:flex;align-items:center;justify-content:center}.nrf-css-fallback .nrf-page{width:min(500px,90%);height:100%;box-shadow:0 14px 36px rgba(0,0,0,.18)}
.nrf-nav{position:absolute;top:50%;transform:translateY(-50%);width:48px;height:64px;border:0;border-radius:14px;background:linear-gradient(180deg,var(--brand2),var(--brand));color:#fff;cursor:pointer;display:grid;place-items:center;font-size:42px;font-weight:800;line-height:1;z-index:12;box-shadow:0 14px 30px rgba(0,119,200,.24);transition:transform .14s,box-shadow .14s,filter .14s}.nrf-nav:hover{transform:translateY(-50%) scale(1.04);box-shadow:0 18px 36px rgba(0,119,200,.32);filter:saturate(1.08)}.nrf-nav-left{left:18px}.nrf-nav-right{right:18px}
.nrf-panel{position:absolute;left:18px;top:76px;bottom:58px;width:246px;z-index:25;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border:1px solid rgba(210,222,235,.8);border-radius:18px;padding:14px;box-shadow:0 22px 55px rgba(18,35,60,.18);overflow:hidden;opacity:0;transform:translateX(-280px);transition:opacity .22s,transform .24s;pointer-events:none}.nrf-panel.nrf-panel-open{opacity:1;transform:translateX(0);pointer-events:auto}.nrf-panel-head{font-size:14px;font-weight:800;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center;color:#162033}.nrf-thumb-list{height:calc(100% - 34px);overflow-y:auto;display:grid;grid-template-columns:1fr 1fr;gap:9px;padding-right:4px}.nrf-thumb{border:2px solid transparent;background:#fff;border-radius:12px;padding:6px;cursor:pointer;box-shadow:0 6px 18px rgba(26,42,70,.08);transition:border-color .15s,box-shadow .15s,transform .15s}.nrf-thumb:hover{transform:translateY(-1px)}.nrf-thumb.active{border-color:var(--brand);box-shadow:0 10px 24px rgba(0,119,200,.22)}.nrf-thumb img{width:100%;height:98px;object-fit:contain;background:#f8fafc;display:block;border-radius:8px}.nrf-thumb span{display:block;font-size:10px;font-weight:800;color:var(--muted);text-align:center;margin-top:5px}
.nrf-bottombar{flex:0 0 46px;display:flex;align-items:center;gap:12px;padding:0 18px;background:#fff;border-top:1px solid var(--line)}.nrf-pageinfo{flex:0 0 auto;background:#edf7ff;color:var(--brand);border:1px solid #cbe7fb;font-size:11px;font-weight:800;padding:4px 12px;border-radius:999px;white-space:nowrap;min-width:62px;text-align:center}.nrf-progress-wrap{flex:1;min-width:0;position:relative;height:24px;display:flex;align-items:center}.nrf-progress-track{position:absolute;left:0;right:0;height:6px;background:#e7ecf2;border-radius:999px;overflow:hidden;pointer-events:none}.nrf-progress-fill{height:100%;width:0;background:linear-gradient(90deg,var(--brand),#35a7ff);border-radius:999px;transition:width .24s ease}.nrf-range{position:absolute;left:0;right:0;width:100%;height:24px;margin:0;opacity:0;cursor:pointer;z-index:2}.nrf-zoom-label{flex:0 0 auto;font-size:11px;font-weight:800;color:#647084;background:#f7f9fc;border:1px solid #dde5ee;border-radius:9px;padding:4px 9px;min-width:46px;text-align:center}.nrf-viewer:fullscreen{padding:10px;background:#e8edf3}.nrf-viewer:fullscreen .nrf-shell{height:100%;border-radius:16px}
@media(max-width:900px){.nrf-viewer-container{padding:8px 4px}.nrf-viewer{height:86vh;min-height:560px}.nrf-topbar{height:auto;flex:0 0 auto;flex-wrap:wrap;gap:8px;padding:10px}.nrf-tools{gap:6px;overflow-x:auto;max-width:100%;padding-bottom:2px}.nrf-tools button,.nrf-dl{height:32px;min-width:34px}.nrf-book-area{padding:24px 50px 22px}.nrf-nav{width:38px;height:56px;font-size:34px;border-radius:12px}.nrf-nav-left{left:8px}.nrf-nav-right{right:8px}.nrf-panel{left:8px;top:70px;width:220px}.nrf-brand span{display:none}}
@media(max-width:520px){.nrf-viewer{height:84vh;min-height:500px}.nrf-shell{border-radius:14px}.nrf-book-area{padding:16px 42px}.nrf-nav{width:34px;height:50px;font-size:30px}.nrf-bottombar{padding:0 10px;gap:8px}.nrf-zoom-label{display:none}.nrf-brand{min-width:auto}.nrf-brand strong{font-size:12px}.nrf-mark{width:30px;height:30px}.nrf-panel{right:8px;width:auto;bottom:52px}.nrf-thumb img{height:82px}}

/* v11 refinements requested */
.nrf-viewer{height:88vh;min-height:720px}
.nrf-reader{padding:18px 0 20px}
.nrf-book-area{padding:36px 86px 38px;overflow:hidden}
.nrf-tools button,.nrf-dl{border-radius:12px;background:linear-gradient(180deg,#fff,#f5faff);border-color:#cfe0ee;color:#0d2a46;box-shadow:0 8px 18px rgba(0,53,92,.10), inset 0 1px 0 rgba(255,255,255,.9)}
.nrf-tools button:hover,.nrf-dl:hover{background:#eaf6ff;border-color:#93cdf4;color:var(--brand);box-shadow:0 12px 26px rgba(0,119,200,.14)}
.nrf-btn-reset{min-width:96px!important;font-size:12px!important;white-space:nowrap}.nrf-dl{min-width:112px!important;background:linear-gradient(180deg,#0e2a49,#071c34)!important;color:#fff!important;border-color:#071c34!important}
.nrf-nav{position:absolute;top:50%;width:48px;height:60px;border-radius:13px;font-size:0;display:flex;align-items:center;justify-content:center;padding:0;text-align:center;line-height:1;z-index:40;transform:translateY(-50%)}
.nrf-nav:before{content:attr(aria-label);display:none}.nrf-nav-left:after{content:'‹';font-size:44px;font-weight:900;line-height:1;color:#fff;display:block;margin-top:-4px}.nrf-nav-right:after{content:'›';font-size:44px;font-weight:900;line-height:1;color:#fff;display:block;margin-top:-4px}.nrf-nav:hover{transform:translateY(-50%) scale(1.04)}
.nrf-nav-left{left:18px}.nrf-nav-right{right:18px}
.nrf-zoomed .nrf-book,.nrf-zoomed .stf__parent,.nrf-zoomed .stf__block{pointer-events:none!important}.nrf-zoomed .nrf-book-area{cursor:grab}.nrf-zoomed .nrf-book-area:active{cursor:grabbing}
.nrf-panel{top:88px;bottom:70px}.nrf-thumb:hover{border-color:#8fd2ff;background:#eef8ff;box-shadow:0 10px 24px rgba(0,119,200,.14)}.nrf-thumb.active{border-color:var(--brand)!important;background:#e9f6ff!important;box-shadow:0 12px 28px rgba(0,119,200,.24)!important}.nrf-thumb:focus{outline:3px solid rgba(0,119,200,.25)}
.nrf-at-cover .nrf-book{transform:translateX(-25%)}.nrf-at-end .nrf-book{transform:translateX(25%)}.nrf-zoomed.nrf-at-cover .nrf-book,.nrf-zoomed.nrf-at-end .nrf-book{transform:none}
.nrf-book:after,.stf__parent:after{width:34px;opacity:.55;background:linear-gradient(90deg,rgba(0,0,0,.22),rgba(255,255,255,.34) 46%,rgba(0,0,0,.20));filter:blur(10px)}
@media(max-width:900px){.nrf-viewer{height:88vh;min-height:600px}.nrf-reader{padding:12px 0 16px}.nrf-book-area{padding:28px 54px 32px}.nrf-nav{width:42px;height:56px}.nrf-nav-left:after,.nrf-nav-right:after{font-size:38px}.nrf-btn-reset{min-width:82px!important}.nrf-dl{min-width:96px!important}}
@media(max-width:520px){.nrf-viewer{height:86vh;min-height:540px}.nrf-book-area{padding:20px 44px 26px}.nrf-nav{width:36px;height:52px}.nrf-nav-left:after,.nrf-nav-right:after{font-size:34px}.nrf-btn-reset{min-width:74px!important;font-size:11px!important}.nrf-dl{min-width:90px!important;font-size:11px!important}}

/* v12 refinements: smoother cover, mobile fit, no zoom scrollbars */
.nrf-viewer{height:88vh;min-height:700px;max-height:calc(100vh - 26px)}
.nrf-shell{overflow:hidden;background:#fff}
.nrf-reader{padding:28px 0 30px;background:radial-gradient(circle at center,#ffffff 0,#f8fbff 46%,#e7eef6 100%)}
.nrf-book-area{padding:46px 90px 48px!important;overflow:hidden!important;touch-action:none;overscroll-behavior:contain}
.nrf-book-inner{will-change:transform;transition:transform .14s ease-out!important}
.nrf-book,.stf__parent,.stf__block,.stf__item,.stf__wrapper{backface-visibility:hidden;transform-style:preserve-3d;will-change:transform}
.nrf-book{transition:transform .25s ease, filter .25s ease}
.nrf-nav{position:absolute!important;top:50%!important;display:flex!important;align-items:center!important;justify-content:center!important;background:linear-gradient(180deg,#0b95df,#0078c8)!important;color:#fff!important;box-shadow:0 16px 34px rgba(0,132,210,.28)!important;z-index:80!important;pointer-events:auto!important}
.nrf-nav-left{left:18px!important}.nrf-nav-right{right:18px!important}
.nrf-nav-left:after,.nrf-nav-right:after{margin:0!important;line-height:.8!important;transform:translateY(-2px)}
.nrf-dl{background:linear-gradient(180deg,#0b95df,#0078c8)!important;border-color:#0078c8!important;color:#fff!important;box-shadow:0 10px 22px rgba(0,132,210,.22)!important}
.nrf-dl:hover{background:linear-gradient(180deg,#12a6f5,#0078c8)!important;color:#fff!important}
.nrf-tools{flex-wrap:nowrap}.nrf-btn-reset{min-width:112px!important}.nrf-dl{min-width:126px!important;white-space:nowrap}
.nrf-zoomed .nrf-book-area{overflow:hidden!important;cursor:grab!important}
.nrf-zoomed .nrf-book-area *{user-select:none!important}
.nrf-zoomed .nrf-book,.nrf-zoomed .stf__parent,.nrf-zoomed .stf__block,.nrf-zoomed .stf__item{pointer-events:none!important}
.nrf-zoomed .nrf-nav{pointer-events:auto!important}
.nrf-book-area::-webkit-scrollbar,.nrf-reader::-webkit-scrollbar,.nrf-book-inner::-webkit-scrollbar{display:none!important}.nrf-book-area,.nrf-reader,.nrf-book-inner{scrollbar-width:none!important;-ms-overflow-style:none!important}
.nrf-thumb:hover,.nrf-thumb.active{border-color:#0078c8!important;background:#eaf6ff!important}.nrf-thumb.active{box-shadow:0 12px 28px rgba(0,119,200,.24)!important}.nrf-thumb:hover{box-shadow:0 10px 24px rgba(0,119,200,.14)!important}
.nrf-book:after,.stf__parent:after{width:38px!important;opacity:.64!important;filter:blur(11px)!important;background:linear-gradient(90deg,rgba(0,0,0,.20),rgba(255,255,255,.42) 48%,rgba(0,0,0,.18))!important}
.nrf-at-cover .nrf-book,.nrf-at-end .nrf-book{transform:none!important}
.nrf-at-cover .stf__parent{transform:translateX(-25%)!important}.nrf-at-end .stf__parent{transform:translateX(25%)!important}
.nrf-zoomed.nrf-at-cover .stf__parent,.nrf-zoomed.nrf-at-end .stf__parent{transform:none!important}

@media(max-width:900px){
  .nrf-viewer-container{padding:10px 6px!important}.nrf-viewer{height:88vh;min-height:620px;max-height:none}.nrf-shell{border-radius:18px}
  .nrf-topbar{display:grid!important;grid-template-columns:1fr;align-items:start;height:auto!important;padding:12px!important;gap:12px!important}.nrf-brand{width:100%;min-width:0}.nrf-tools{width:100%;display:flex!important;gap:7px!important;overflow:visible!important;flex-wrap:wrap!important;justify-content:flex-start!important}.nrf-tools button,.nrf-dl{height:38px!important;min-width:44px!important;border-radius:14px!important;font-size:13px!important}.nrf-btn-reset{min-width:118px!important}.nrf-dl{min-width:126px!important;text-align:center!important;padding:0 12px!important}
  .nrf-reader{padding:22px 0 26px!important}.nrf-book-area{padding:38px 56px 44px!important}.nrf-nav{width:46px!important;height:64px!important;border-radius:16px!important}.nrf-nav-left{left:12px!important}.nrf-nav-right{right:12px!important}.nrf-nav-left:after,.nrf-nav-right:after{font-size:40px!important}.nrf-panel{top:128px!important;bottom:58px!important}
}
@media(max-width:520px){
  .nrf-viewer-container{padding:6px 0!important}.nrf-viewer{height:84vh!important;min-height:560px!important}.nrf-shell{border-radius:18px;margin:0 6px}.nrf-topbar{padding:12px 10px!important}.nrf-brand strong{font-size:15px!important}.nrf-brand span{display:block!important;font-size:10px!important}.nrf-mark{width:46px!important;height:46px!important;border-radius:16px!important;font-size:20px!important}.nrf-tools{gap:8px!important}.nrf-tools button{height:44px!important;min-width:52px!important;font-size:16px!important}.nrf-btn-reset{min-width:142px!important;font-size:14px!important}.nrf-dl{height:44px!important;min-width:144px!important;font-size:13px!important;line-height:1.05!important;white-space:normal!important}.nrf-reader{padding:18px 0 22px!important}.nrf-book-area{padding:42px 58px 44px!important;align-items:center!important}.nrf-nav{width:54px!important;height:76px!important;border-radius:18px!important}.nrf-nav-left{left:14px!important}.nrf-nav-right{right:14px!important}.nrf-nav-left:after,.nrf-nav-right:after{font-size:46px!important}.nrf-bottombar{height:44px;flex-basis:44px}.nrf-panel{left:10px!important;right:10px!important;top:162px!important;width:auto!important}.nrf-thumb-list{grid-template-columns:1fr 1fr}.nrf-thumb img{height:96px!important}
}

/* v13 mobile polish + smoother cover alignment */
.nrf-reader{background:#fff!important;padding:24px 0 24px!important}
.nrf-book-area{background:#fff!important;padding-top:42px!important;padding-bottom:42px!important}
.nrf-dl{background:linear-gradient(180deg,#1298e8,#0077C8)!important;border-color:#0077C8!important;color:#fff!important;box-shadow:0 10px 22px rgba(0,119,200,.22)!important}
.nrf-dl:hover{background:linear-gradient(180deg,#28aaff,#087fd0)!important;color:#fff!important}
/* keep cover and last page in natural/right position to avoid cover snap/jerk */
.nrf-at-cover .nrf-book,.nrf-at-end .nrf-book{transform:none!important}
.nrf-at-cover .nrf-book:after,.nrf-at-end .nrf-book:after{opacity:0!important}
.nrf-book{will-change:transform}.stf__block,.stf__item{will-change:transform;backface-visibility:hidden;-webkit-backface-visibility:hidden}

@media(max-width:700px){
  .nrf-viewer-container{padding:0!important;max-width:100%!important}
  .nrf-viewer{height:90vh!important;min-height:640px!important;width:100%!important}
  .nrf-shell{border-radius:18px!important;background:#fff!important}
  .nrf-topbar{display:grid!important;grid-template-columns:42px 1fr!important;align-items:center!important;padding:12px 12px 10px!important;gap:10px!important;background:#fff!important}
  .nrf-brand{grid-column:1 / -1;gap:10px!important;min-width:0!important}
  .nrf-brand strong{font-size:16px!important}.nrf-brand span{display:none!important}.nrf-mark{width:38px!important;height:38px!important;border-radius:14px!important}
  .nrf-tools{grid-column:1 / -1;display:flex!important;flex-wrap:nowrap!important;gap:7px!important;overflow:visible!important;width:100%!important;padding:0!important;justify-content:flex-start!important}
  .nrf-tools button,.nrf-dl{height:38px!important;min-width:42px!important;width:42px!important;border-radius:14px!important;padding:0!important;font-size:0!important;line-height:1!important;flex:0 0 42px!important;display:flex!important;align-items:center!important;justify-content:center!important}
  .nrf-tools [data-act="panel"]:after{content:'☰';font-size:20px;color:#fff;font-weight:900}
  .nrf-tools [data-act="first"]:after{content:'|‹';font-size:19px;color:#0d2a46;font-weight:900}
  .nrf-tools [data-act="last"]:after{content:'›|';font-size:19px;color:#0d2a46;font-weight:900}
  .nrf-tools [data-act="zoomOut"]:after{content:'−';font-size:22px;color:#0d2a46;font-weight:900}
  .nrf-tools [data-act="zoomIn"]:after{content:'+';font-size:20px;color:#0d2a46;font-weight:900}
  .nrf-tools [data-act="zoomReset"]:after{content:'⛶';font-size:18px;color:#0d2a46;font-weight:900}
  .nrf-tools .nrf-dl:after{content:'↓';font-size:20px;color:#fff;font-weight:900}
  .nrf-btn-reset{min-width:42px!important;width:42px!important}
  .nrf-dl{min-width:42px!important;width:42px!important;background:linear-gradient(180deg,#1298e8,#0077C8)!important;border-color:#0077C8!important}
  .nrf-reader{padding:8px 0 10px!important;background:#fff!important}
  .nrf-book-area{padding:18px 52px 22px!important;background:#fff!important;overflow:hidden!important;touch-action:none!important}
  .nrf-nav{width:40px!important;height:54px!important;border-radius:15px!important;box-shadow:0 12px 24px rgba(0,119,200,.20)!important;z-index:50!important}
  .nrf-nav-left{left:10px!important}.nrf-nav-right{right:10px!important}
  .nrf-nav-left:after,.nrf-nav-right:after{font-size:38px!important;margin-top:-3px!important}
  .nrf-bottombar{height:46px!important;flex:0 0 46px!important;background:#fff!important;padding:0 12px!important}
  .nrf-progress-track{height:6px!important}.nrf-pageinfo{font-size:12px!important;padding:4px 10px!important;min-width:56px!important}
  .nrf-panel{left:12px!important;right:12px!important;top:auto!important;bottom:58px!important;width:auto!important;height:174px!important;border-radius:20px!important;padding:12px!important;background:#fff!important;transform:translateY(220px)!important;box-shadow:0 -18px 44px rgba(17,39,70,.18)!important}
  .nrf-panel.nrf-panel-open{transform:translateY(0)!important;opacity:1!important}
  .nrf-panel-head{margin-bottom:8px!important;font-size:13px!important}
  .nrf-thumb-list{height:116px!important;display:flex!important;grid-template-columns:none!important;gap:10px!important;overflow-x:auto!important;overflow-y:hidden!important;padding:0 2px 4px!important}
  .nrf-thumb{width:76px!important;min-width:76px!important;border-radius:14px!important;padding:5px!important;background:#fff!important;border-color:#e3eef8!important}
  .nrf-thumb:hover,.nrf-thumb.active{border-color:#0077C8!important;background:#eaf6ff!important;box-shadow:0 8px 20px rgba(0,119,200,.18)!important}
  .nrf-thumb img{height:78px!important;border-radius:10px!important}.nrf-thumb span{font-size:10px!important;margin-top:3px!important}
}

@media(max-width:420px){
  .nrf-viewer{height:90vh!important;min-height:620px!important}
  .nrf-topbar{padding:10px 10px 8px!important}
  .nrf-tools{gap:6px!important}
  .nrf-tools button,.nrf-dl{height:34px!important;min-width:36px!important;width:36px!important;border-radius:12px!important;flex-basis:36px!important}
  .nrf-btn-reset,.nrf-dl{min-width:36px!important;width:36px!important}
  .nrf-book-area{padding:16px 46px 18px!important}
  .nrf-nav{width:36px!important;height:48px!important;border-radius:14px!important}.nrf-nav-left:after,.nrf-nav-right:after{font-size:34px!important}
  .nrf-panel{height:160px!important}.nrf-thumb-list{height:104px!important}.nrf-thumb{width:68px!important;min-width:68px!important}.nrf-thumb img{height:68px!important}
}

/* v14 mobile UI polish */
.nrf-tools button,.nrf-dl{color:#516273!important;font-weight:700!important}
.nrf-tools button:after{color:#516273!important;font-weight:800!important}
.nrf-tool-panel{background:linear-gradient(180deg,#1598e2,#087fcb)!important;color:#fff!important}
.nrf-tool-panel:after{color:#fff!important}
.nrf-dl{background:linear-gradient(180deg,#1598e2,#087fcb)!important;border-color:#087fcb!important;color:#fff!important}
.nrf-dl:after{color:#fff!important}
.nrf-nav{width:44px!important;height:44px!important;border-radius:12px!important;font-size:0!important;box-shadow:0 12px 24px rgba(0,119,200,.18)!important}
.nrf-nav-left:after,.nrf-nav-right:after{font-size:34px!important;line-height:1!important;transform:translateY(-1px)!important;color:#fff!important}

@media(max-width:700px){
  .nrf-viewer-container{margin-top:50px!important;padding-left:0!important;padding-right:0!important}
  .nrf-shell{box-shadow:0 14px 38px rgba(16,37,65,.12)!important;border-color:#e5edf5!important}
  .nrf-topbar{display:block!important;padding:12px!important;background:#fff!important;border-bottom:1px solid #e5edf5!important}
  .nrf-brand{display:flex!important;width:100%!important;margin-bottom:10px!important;align-items:center!important}
  .nrf-brand strong{font-size:15px!important;color:#1b2735!important;font-weight:800!important}
  .nrf-mark{width:34px!important;height:34px!important;border-radius:12px!important;font-size:16px!important}
  .nrf-tools{display:flex!important;flex-wrap:nowrap!important;gap:6px!important;align-items:center!important;justify-content:flex-start!important;width:100%!important;overflow-x:auto!important;overflow-y:hidden!important;scrollbar-width:none!important;-ms-overflow-style:none!important;padding:1px 0 3px!important}
  .nrf-tools::-webkit-scrollbar{display:none!important}
  .nrf-tools button,.nrf-dl{height:34px!important;min-width:36px!important;width:36px!important;flex:0 0 36px!important;border-radius:11px!important;background:#fff!important;border:1px solid #cfe0ee!important;color:#516273!important;box-shadow:0 6px 14px rgba(20,45,76,.07)!important;padding:0!important;font-size:0!important}
  .nrf-tools [data-act="panel"]{background:linear-gradient(180deg,#1598e2,#087fcb)!important;border-color:#087fcb!important;color:#fff!important}
  .nrf-tools [data-act="panel"]:after{font-size:18px!important;color:#fff!important}
  .nrf-tools [data-act="first"]:after,.nrf-tools [data-act="last"]:after{font-size:17px!important;color:#516273!important;font-weight:800!important}
  .nrf-tools [data-act="zoomOut"]:after{font-size:20px!important;color:#516273!important;font-weight:800!important}
  .nrf-tools [data-act="zoomIn"]:after{font-size:18px!important;color:#516273!important;font-weight:800!important}
  .nrf-tools [data-act="zoomReset"]:after{font-size:17px!important;color:#516273!important;font-weight:800!important}
  .nrf-dl{background:linear-gradient(180deg,#1598e2,#087fcb)!important;border-color:#087fcb!important;color:#fff!important}
  .nrf-tools .nrf-dl:after{font-size:18px!important;color:#fff!important}
  .nrf-reader{background:#fff!important;padding-top:12px!important}
  .nrf-book-area{padding:14px 48px 18px!important;background:#fff!important}
  .nrf-nav{width:38px!important;height:38px!important;border-radius:10px!important;background:linear-gradient(180deg,#1598e2,#087fcb)!important;box-shadow:0 10px 20px rgba(0,119,200,.17)!important}
  .nrf-nav-left{left:9px!important}.nrf-nav-right{right:9px!important}
  .nrf-nav-left:after,.nrf-nav-right:after{font-size:31px!important;line-height:.9!important;transform:translateY(-2px)!important}
  .nrf-panel{left:10px!important;right:10px!important;bottom:56px!important;height:190px!important;background:#fff!important;border:1px solid #e1edf7!important;border-radius:18px!important}
  .nrf-thumb:hover,.nrf-thumb.active{background:#eaf6ff!important;border-color:#087fcb!important}
}

@media(max-width:420px){
  .nrf-viewer-container{margin-top:50px!important}
  .nrf-topbar{padding:10px!important}
  .nrf-brand{margin-bottom:9px!important}
  .nrf-tools{gap:5px!important}
  .nrf-tools button,.nrf-dl{height:32px!important;min-width:34px!important;width:34px!important;flex-basis:34px!important;border-radius:10px!important}
  .nrf-book-area{padding-left:44px!important;padding-right:44px!important}
  .nrf-nav{width:34px!important;height:34px!important;border-radius:9px!important}
  .nrf-nav-left:after,.nrf-nav-right:after{font-size:28px!important}
}


/* v15 mobile header + arrow polish */
@media (max-width: 767px){
  .nrf-viewer-container{
    margin-top:50px!important;
    padding:0 8px!important;
    max-width:100%!important;
  }
  .nrf-viewer{
    height:90vh!important;
    min-height:620px!important;
  }
  .nrf-shell{
    border-radius:16px!important;
    overflow:hidden!important;
    background:#fff!important;
    box-shadow:0 14px 38px rgba(23,42,70,.10)!important;
  }
  .nrf-topbar{
    display:grid!important;
    grid-template-columns:1fr!important;
    gap:8px!important;
    padding:10px 12px 11px!important;
    background:#fff!important;
    border-bottom:1px solid #edf2f7!important;
  }
  .nrf-brand{
    display:flex!important;
    align-items:center!important;
    gap:9px!important;
    min-width:0!important;
    width:100%!important;
    margin:0!important;
  }
  .nrf-mark{
    width:32px!important;
    height:32px!important;
    min-width:32px!important;
    border-radius:10px!important;
    font-size:15px!important;
    box-shadow:0 7px 16px rgba(0,119,200,.18)!important;
  }
  .nrf-brand strong{
    font-size:15px!important;
    line-height:1.1!important;
    font-weight:800!important;
    color:#1f2937!important;
    white-space:nowrap!important;
    overflow:hidden!important;
    text-overflow:ellipsis!important;
  }
  .nrf-brand span{display:none!important;}
  .nrf-tools{
    display:flex!important;
    align-items:center!important;
    justify-content:flex-start!important;
    gap:6px!important;
    width:100%!important;
    overflow-x:auto!important;
    overflow-y:hidden!important;
    scrollbar-width:none!important;
    -webkit-overflow-scrolling:touch!important;
    padding:0!important;
    margin:0!important;
  }
  .nrf-tools::-webkit-scrollbar{display:none!important;}
  .nrf-tools button,
  .nrf-tools .nrf-dl{
    width:34px!important;
    min-width:34px!important;
    height:34px!important;
    flex:0 0 34px!important;
    border-radius:10px!important;
    padding:0!important;
    font-size:0!important;
    line-height:1!important;
    background:#fff!important;
    border:1px solid #d6e4f0!important;
    color:#64748b!important;
    box-shadow:0 5px 12px rgba(15,35,60,.06)!important;
    display:flex!important;
    align-items:center!important;
    justify-content:center!important;
    font-weight:700!important;
  }
  .nrf-tools button:hover{background:#f5fbff!important;color:#64748b!important;transform:none!important;}
  .nrf-tools button:after{
    color:#64748b!important;
    font-weight:700!important;
    line-height:1!important;
  }
  .nrf-tools [data-act="panel"]{
    background:#108bd3!important;
    border-color:#108bd3!important;
    color:#fff!important;
  }
  .nrf-tools [data-act="panel"]:after{content:'☰'!important;color:#fff!important;font-size:17px!important;font-weight:700!important;}
  .nrf-tools [data-act="first"]:after{content:'|‹'!important;font-size:16px!important;color:#64748b!important;font-weight:700!important;}
  .nrf-tools [data-act="last"]:after{content:'›|'!important;font-size:16px!important;color:#64748b!important;font-weight:700!important;}
  .nrf-tools [data-act="zoomOut"]:after{content:'−'!important;font-size:20px!important;color:#64748b!important;font-weight:700!important;}
  .nrf-tools [data-act="zoomIn"]:after{content:'+'!important;font-size:18px!important;color:#64748b!important;font-weight:700!important;}
  .nrf-tools [data-act="zoomReset"]:after{content:'⛶'!important;font-size:16px!important;color:#64748b!important;font-weight:700!important;}
  .nrf-tools .nrf-dl{
    background:#108bd3!important;
    border-color:#108bd3!important;
    color:#fff!important;
  }
  .nrf-tools .nrf-dl:after{content:'↓'!important;color:#fff!important;font-size:18px!important;font-weight:700!important;}
  .nrf-reader{
    background:#fff!important;
    padding:10px 0 10px!important;
  }
  .nrf-book-area{
    background:#fff!important;
    padding:16px 44px 18px!important;
    overflow:hidden!important;
  }
  .nrf-viewer .nrf-nav{
    width:36px!important;
    height:36px!important;
    min-width:36px!important;
    border-radius:9px!important;
    padding:0!important;
    background:#108bd3!important;
    color:#fff!important;
    box-shadow:0 9px 18px rgba(0,119,200,.16)!important;
    display:flex!important;
    align-items:center!important;
    justify-content:center!important;
  }
  .nrf-viewer .nrf-nav-left{left:10px!important;}
  .nrf-viewer .nrf-nav-right{right:10px!important;}
  .nrf-viewer .nrf-nav-left:after,
  .nrf-viewer .nrf-nav-right:after{
    font-size:28px!important;
    font-weight:700!important;
    line-height:1!important;
    margin:0!important;
    transform:translateY(-1px)!important;
    color:#fff!important;
  }
  .nrf-panel{
    background:#fff!important;
    left:10px!important;
    right:10px!important;
    bottom:56px!important;
    height:188px!important;
    border-radius:18px!important;
    border:1px solid #e2edf6!important;
    box-shadow:0 -16px 36px rgba(20,42,70,.16)!important;
  }
}

@media (max-width: 390px){
  .nrf-viewer-container{margin-top:50px!important;padding-left:6px!important;padding-right:6px!important;}
  .nrf-topbar{padding:9px 10px 10px!important;gap:7px!important;}
  .nrf-tools{gap:5px!important;}
  .nrf-tools button,.nrf-tools .nrf-dl{width:32px!important;min-width:32px!important;height:32px!important;flex-basis:32px!important;border-radius:9px!important;}
  .nrf-book-area{padding-left:42px!important;padding-right:42px!important;}
  .nrf-viewer .nrf-nav{width:34px!important;height:34px!important;border-radius:9px!important;}
  .nrf-viewer .nrf-nav-left:after,.nrf-viewer .nrf-nav-right:after{font-size:26px!important;}
}

/* v16 mobile equal spacing + allow outside page scroll */
@media (max-width: 767px){
  .nrf-viewer-container{
    margin-top:50px!important;
    padding-left:0!important;
    padding-right:0!important;
    width:100%!important;
    max-width:100%!important;
    overflow:visible!important;
  }
  .nrf-viewer{
    width:100%!important;
    max-width:100%!important;
    height:auto!important;
    min-height:0!important;
    overflow:visible!important;
  }
  .nrf-shell{
    width:calc(100% - 16px)!important;
    max-width:calc(100% - 16px)!important;
    margin:0 auto!important;
    border-radius:16px!important;
  }
  .nrf-reader,
  .nrf-book-area,
  .nrf-book-inner{
    touch-action:pan-y!important;
    overscroll-behavior:auto!important;
  }
  .nrf-reader{
    min-height:72vh!important;
  }
  .nrf-book-area{
    min-height:70vh!important;
  }
  .nrf-zoomed .nrf-book-area{
    touch-action:none!important;
    overscroll-behavior:contain!important;
  }
  .nrf-tools{
    touch-action:pan-x!important;
  }
}
@media (max-width: 420px){
  .nrf-shell{
    width:calc(100% - 12px)!important;
    max-width:calc(100% - 12px)!important;
    margin-left:auto!important;
    margin-right:auto!important;
  }
}