:root{
  --bg:#070b13;--panel:#0f1625;--panel2:#131d30;--paper:#121a29;--paper2:#0e1522;--text:#e8eef8;--muted:#8fa2bd;
  --accent:#6d7cff;--accent2:#22d3ee;--gold:#f5c76a;--line:#24324b;--danger:#ff6b81;--ok:#56d38a;--shadow:0 24px 70px rgba(0,0,0,.45);
  --radius:18px;--zoom:1;--toolbar-h:64px;--bottom-h:72px;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI","Noto Sans Bengali",sans-serif;color-scheme:dark;
}
html[data-theme="light"]{--bg:#eef2f8;--panel:#fff;--panel2:#f7f9fc;--paper:#fffef9;--paper2:#fffaf0;--text:#172033;--muted:#5e6c83;--accent:#4f46e5;--accent2:#0891b2;--line:#dbe2ec;--shadow:0 24px 60px rgba(25,35,60,.18);color-scheme:light}
*{box-sizing:border-box}html,body{height:100%;margin:0}body{overflow:hidden;background:radial-gradient(circle at 20% 10%,rgba(77,99,255,.16),transparent 30%),radial-gradient(circle at 90% 20%,rgba(34,211,238,.08),transparent 28%),var(--bg);color:var(--text)}
button,input,select{font:inherit}button{color:inherit}.ambient{position:fixed;inset:0;pointer-events:none;overflow:hidden}.ambient i{position:absolute;border-radius:50%;filter:blur(80px);opacity:.12;animation:float 18s ease-in-out infinite}.ambient i:nth-child(1){width:28vw;height:28vw;background:#6d7cff;left:-8vw;top:10vh}.ambient i:nth-child(2){width:22vw;height:22vw;background:#22d3ee;right:-6vw;top:35vh;animation-delay:-5s}.ambient i:nth-child(3){width:18vw;height:18vw;background:#9c5cff;left:45vw;bottom:-8vw;animation-delay:-9s}@keyframes float{50%{transform:translate3d(3vw,-2vh,0) scale(1.08)}}
.topbar{height:var(--toolbar-h);display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid color-mix(in srgb,var(--line),transparent 20%);background:color-mix(in srgb,var(--bg),transparent 12%);backdrop-filter:blur(18px);position:relative;z-index:30}.topbar-left,.topbar-actions{display:flex;align-items:center;gap:8px}.book-brand{display:flex;flex-direction:column;margin-left:4px}.book-brand strong{font-size:14px;letter-spacing:.01em}.book-brand span{font-size:11px;color:var(--muted)}
.icon-btn{width:40px;height:40px;border:1px solid var(--line);background:color-mix(in srgb,var(--panel),transparent 10%);border-radius:12px;display:grid;place-items:center;cursor:pointer;transition:.2s ease}.icon-btn:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--accent),var(--line) 45%);background:var(--panel2)}.icon-btn:focus-visible,.nav-btn:focus-visible,.primary-btn:focus-visible,.ghost-btn:focus-visible{outline:3px solid color-mix(in srgb,var(--accent),transparent 45%);outline-offset:2px}.icon-btn.active{border-color:color-mix(in srgb,var(--accent2),var(--line) 25%);background:color-mix(in srgb,var(--accent2),var(--panel) 82%);color:var(--accent2)}
.reader-shell{height:calc(100vh - var(--toolbar-h) - var(--bottom-h));display:grid;grid-template-columns:minmax(44px,7vw) 1fr minmax(44px,7vw);align-items:center;position:relative;z-index:2}.book-zone{height:100%;display:grid;place-items:center;overflow:hidden;padding:14px}.flipbook{transform:scale(var(--zoom));transform-origin:center center;transition:transform .18s ease}.edge-nav{height:64%;border:0;background:transparent;cursor:pointer;color:var(--muted);font-size:38px;display:grid;place-items:center;opacity:.35;transition:.2s}.edge-nav:hover{opacity:1;color:var(--text)}.edge-nav span{width:46px;height:72px;display:grid;place-items:center;border:1px solid transparent;border-radius:18px}.edge-nav:hover span{background:var(--panel);border-color:var(--line)}
.bottom-bar{height:var(--bottom-h);border-top:1px solid var(--line);background:color-mix(in srgb,var(--bg),transparent 8%);backdrop-filter:blur(18px);display:flex;align-items:center;justify-content:space-between;padding:0 18px;position:relative;z-index:30}.nav-cluster{display:flex;align-items:center;gap:10px}.nav-btn,.ghost-btn,.primary-btn{border:1px solid var(--line);border-radius:12px;padding:10px 14px;background:var(--panel);cursor:pointer;transition:.2s}.nav-btn:hover,.ghost-btn:hover{border-color:var(--accent);background:var(--panel2)}.primary-btn{background:linear-gradient(135deg,var(--accent),#8b5cf6);border-color:transparent;color:white;font-weight:700}.page-jump{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:13px}.page-jump input{width:58px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px;color:var(--text);text-align:center}.progress-wrap{display:flex;align-items:center;gap:10px;min-width:260px}.progress-track{height:6px;background:var(--panel2);border-radius:999px;overflow:hidden;flex:1}.progress-track i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:999px;transition:width .25s ease}.progress-wrap span{font-size:12px;color:var(--muted);width:38px;text-align:right}
.drawer{position:fixed;z-index:60;left:0;top:0;bottom:0;width:min(390px,92vw);background:color-mix(in srgb,var(--panel),transparent 2%);border-right:1px solid var(--line);box-shadow:var(--shadow);transform:translateX(-102%);transition:.3s cubic-bezier(.2,.8,.2,1);display:flex;flex-direction:column}.drawer.open{transform:none}.drawer-head,.panel-head{padding:18px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.drawer-head>div,.panel-head>div{display:flex;flex-direction:column;gap:3px}.drawer-head small,.panel-head small{color:var(--muted)}.toc-list{padding:10px;overflow:auto;flex:1}.toc-list button{width:100%;text-align:left;border:0;background:transparent;color:var(--text);padding:11px 12px;border-radius:10px;display:flex;justify-content:space-between;cursor:pointer}.toc-list button:hover{background:var(--panel2)}.toc-list span{color:var(--muted);font-size:12px}.drawer-section{border-top:1px solid var(--line);padding:14px 18px}.drawer-section h3{margin:0 0 8px;font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.bookmark-list{max-height:150px;overflow:auto}.bookmark-list button{display:flex;width:100%;justify-content:space-between;padding:8px;background:transparent;border:0;color:var(--text);cursor:pointer}.drawer-foot{padding:14px 18px;border-top:1px solid var(--line)}.drawer-foot a{color:var(--accent2);text-decoration:none}.backdrop{position:fixed;inset:0;background:rgba(0,0,0,.46);z-index:50;opacity:0;pointer-events:none;transition:.2s}.backdrop.show{opacity:1;pointer-events:auto}
.panel{position:fixed;z-index:70;top:74px;right:18px;width:min(430px,calc(100vw - 36px));max-height:calc(100vh - 150px);overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);opacity:0;transform:translateY(-10px) scale(.98);pointer-events:none;transition:.22s ease}.panel.open{opacity:1;transform:none;pointer-events:auto}.search-box{margin:14px;display:flex;align-items:center;gap:8px;background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:10px 12px}.search-box input{width:100%;border:0;outline:0;background:transparent;color:var(--text)}.search-results{padding:0 14px 14px;max-height:58vh;overflow:auto}.search-result{display:block;width:100%;text-align:left;background:transparent;border:0;border-bottom:1px solid var(--line);padding:12px 4px;color:var(--text);cursor:pointer}.search-result strong{display:block}.search-result small{color:var(--muted)}.search-result mark{background:rgba(245,199,106,.25);color:var(--gold);border-radius:3px;padding:0 2px}.muted{color:var(--muted)}
.settings-panel{padding-bottom:12px}.setting-group{padding:14px 18px;border-bottom:1px solid var(--line)}.setting-group>label{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:10px}.segmented{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:6px}.segmented button,.zoom-buttons button{border:1px solid var(--line);background:var(--panel2);color:var(--text);padding:8px;border-radius:10px;cursor:pointer}.segmented button.active{background:color-mix(in srgb,var(--accent),var(--panel) 58%);border-color:var(--accent)}.setting-group input[type=range]{width:100%;accent-color:var(--accent)}.zoom-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;padding:12px 18px;border-bottom:1px solid var(--line)}.setting-row{display:flex;align-items:center;justify-content:space-between;padding:13px 18px;border-bottom:1px solid var(--line)}.switch input{display:none}.switch span{width:44px;height:24px;border-radius:999px;background:#29354a;display:block;position:relative;transition:.2s}.switch span:after{content:"";position:absolute;width:18px;height:18px;top:3px;left:3px;border-radius:50%;background:white;transition:.2s}.switch input:checked+span{background:var(--accent)}.switch input:checked+span:after{left:23px}.auto-speed select{width:100%;background:var(--panel2);border:1px solid var(--line);border-radius:10px;color:var(--text);padding:9px}.setting-actions{display:flex;gap:8px;padding:12px 18px}.setting-actions button{flex:1}
.resume-prompt{position:fixed;inset:0;z-index:100;background:rgba(5,9,16,.72);display:grid;place-items:center;opacity:0;pointer-events:none;transition:.2s;backdrop-filter:blur(8px)}.resume-prompt.open{opacity:1;pointer-events:auto}.resume-prompt>div{width:min(440px,90vw);padding:24px;background:var(--panel);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.resume-prompt strong{font-size:22px}.resume-prompt p{color:var(--muted)}.resume-prompt>div>div{display:flex;gap:8px}
.toast{position:fixed;z-index:120;left:50%;bottom:90px;transform:translate(-50%,18px);background:#111b2d;border:1px solid var(--line);color:#fff;padding:10px 14px;border-radius:12px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translate(-50%,0)}
.loading-screen{position:fixed;inset:0;z-index:200;background:radial-gradient(circle at 50% 30%,#18213d,#070b13 60%);display:flex;flex-direction:column;align-items:center;justify-content:center;color:#eef3ff;transition:opacity .5s ease,visibility .5s}.loading-screen.done{opacity:0;visibility:hidden}.loading-screen h1{font-size:24px;margin:18px 0 5px}.loading-screen p{color:#9fb0ca;margin:0 0 18px}.loading-bar{width:min(340px,70vw);height:5px;background:#1e2a40;border-radius:999px;overflow:hidden}.loading-bar i{display:block;width:15%;height:100%;background:linear-gradient(90deg,#6d7cff,#22d3ee);animation:load 2s ease-in-out infinite}.loader-book{width:62px;height:44px;display:flex;perspective:300px}.loader-book span{width:50%;background:linear-gradient(160deg,#7583ff,#4f5bd5);border-radius:6px 1px 1px 6px;transform-origin:right;animation:bookpage 1.3s ease-in-out infinite}.loader-book span+span{border-radius:1px 6px 6px 1px;transform-origin:left;animation-delay:-.65s}@keyframes bookpage{50%{transform:rotateY(-25deg)}}@keyframes load{50%{width:78%;transform:translateX(20%)}}
@media print{body{overflow:visible;background:#fff;color:#111}.topbar,.bottom-bar,.edge-nav,.ambient,.drawer,.panel,.backdrop,.toast,.resume-prompt{display:none!important}.reader-shell{height:auto;display:block}.book-zone{display:block;padding:0}.flipbook{transform:none!important}.book-page{page-break-after:always;box-shadow:none!important;margin:0 auto!important}}