.book-page{background:linear-gradient(145deg,var(--paper),var(--paper2));border:1px solid color-mix(in srgb,var(--line),transparent 18%);color:var(--text);overflow:hidden;position:relative;box-shadow:inset 0 0 60px rgba(255,255,255,.015);font-size:14px}.book-page:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(255,255,255,.02),transparent 14%,transparent 86%,rgba(0,0,0,.08))}.page-inner{height:100%;overflow:auto;padding:46px 44px 42px;scrollbar-width:thin;scrollbar-color:var(--line) transparent}.page-number{position:absolute;bottom:14px;left:0;right:0;text-align:center;color:var(--muted);font-size:11px;letter-spacing:.08em}.page-kicker{color:var(--accent2);font-size:11px;text-transform:uppercase;letter-spacing:.16em;font-weight:800;margin-bottom:10px}.book-page h1,.book-page h2,.book-page h3{line-height:1.2}.book-page h1{font-size:30px;margin:0 0 12px;letter-spacing:-.025em}.book-page h2{font-size:18px}.book-page h3{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:16px 0 8px}.book-page p{line-height:1.72}.book-page .bn{font-family:"Noto Sans Bengali",system-ui,sans-serif}.lead-bn{font-size:15px;color:color-mix(in srgb,var(--text),var(--muted) 15%);margin-top:0}.rule-box,.callout,.warning,.tip,.code-note{padding:13px 15px;border:1px solid var(--line);border-radius:13px;background:color-mix(in srgb,var(--panel2),transparent 8%);margin:13px 0}.rule-box{border-left:3px solid var(--accent)}.warning{border-left:3px solid var(--gold)}.tip{border-left:3px solid var(--accent2)}.code-note{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;border-left:3px solid #a78bfa;line-height:1.6}.rule-box h3,.warning h3{margin-top:0}.rule-box ul{padding-left:18px;margin:0}.rule-box li{margin:6px 0}.examples{margin-top:14px}.example-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:9px 0;border-bottom:1px dashed color-mix(in srgb,var(--line),transparent 25%)}.example-row .en{font-weight:650}.example-row .bn{color:var(--muted)}.practice{margin-top:15px;padding-top:8px;border-top:1px solid var(--line)}.practice label{display:flex;gap:9px;align-items:flex-start;padding:6px 0;line-height:1.5}.practice input{margin-top:3px;accent-color:var(--accent)}
.title-mark{display:inline-flex;padding:7px 10px;border-radius:999px;border:1px solid var(--line);color:var(--accent2);font-size:11px;text-transform:uppercase;letter-spacing:.13em}.lead{font-size:17px;line-height:1.8;color:color-mix(in srgb,var(--text),var(--muted) 18%)}.title-meta{display:flex;justify-content:space-between;border-top:1px solid var(--line);margin-top:28px;padding-top:16px}.title-meta span{color:var(--muted)}.steps{padding-left:22px}.steps li{margin:11px 0;line-height:1.6}.roadmap{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:18px 0}.roadmap span{padding:9px 11px;border:1px solid var(--line);background:var(--panel2);border-radius:10px;font-size:12px}.roadmap b{color:var(--accent)}
.cover-page{padding:0!important;background:#070b13!important;color:#fff}.cover-layout{height:100%;position:relative;overflow:hidden;background:linear-gradient(145deg,#070b13 0%,#0c1530 55%,#11142c 100%)}.cover-photo{position:absolute;right:-3%;bottom:0;width:66%;height:94%;object-fit:cover;object-position:center top;filter:saturate(.9) contrast(1.05);mask-image:linear-gradient(90deg,transparent 0%,black 25%,black 100%)}.cover-overlay{position:absolute;inset:0;background:radial-gradient(circle at 70% 35%,rgba(65,108,255,.15),transparent 28%),linear-gradient(90deg,rgba(5,8,16,.98) 0%,rgba(5,8,16,.9) 32%,rgba(5,8,16,.25) 64%,rgba(5,8,16,.05) 100%)}.cover-content{position:absolute;z-index:2;left:7%;top:8%;bottom:7%;width:57%;display:flex;flex-direction:column;justify-content:space-between}.cover-top small{color:#8fa5c9;text-transform:uppercase;letter-spacing:.22em;font-weight:700}.cover-title{font-size:clamp(36px,4.4vw,62px);line-height:.98;margin:18px 0;letter-spacing:-.055em;max-width:620px}.cover-title span{display:block;background:linear-gradient(95deg,#fff,#a9b8ff 50%,#6ee7f9);-webkit-background-clip:text;color:transparent}.cover-sub{max-width:510px;color:#b7c4da;line-height:1.65;font-size:14px}.cover-badges{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px}.cover-badges span{border:1px solid #2a3a5d;background:rgba(15,24,46,.6);padding:7px 9px;border-radius:999px;font-size:10px;color:#c7d4ed}.cover-author{display:flex;align-items:flex-end;justify-content:space-between;border-top:1px solid rgba(255,255,255,.13);padding-top:16px}.cover-author strong{display:block;font-size:18px}.cover-author span{color:#93a7c6;font-size:12px}.read-book-btn{border:0;border-radius:12px;background:linear-gradient(135deg,#6d7cff,#5a42d7);color:#fff;padding:12px 16px;font-weight:800;cursor:pointer;box-shadow:0 12px 30px rgba(79,70,229,.3)}
.author-card{display:grid;grid-template-columns:128px 1fr;gap:18px;align-items:start}.author-card img{width:128px;height:160px;object-fit:cover;object-position:center top;border-radius:16px;border:1px solid var(--line)}.author-card h3{margin:3px 0 8px;color:var(--text);font-size:20px;text-transform:none;letter-spacing:0}.author-card a{color:var(--accent2);text-decoration:none}
.vocab-page .page-inner{padding:30px 30px 36px}.vocab-page h1{font-size:23px}.vocab-subtitle{color:var(--muted);font-size:12px;margin:-4px 0 12px}.vocab-list{border-top:1px solid var(--line)}.vocab-row{display:grid;grid-template-columns:34px 30px 1fr;gap:8px;align-items:start;padding:7px 0;border-bottom:1px solid color-mix(in srgb,var(--line),transparent 28%)}.vocab-num{font-size:10px;color:var(--muted);padding-top:3px}.speak-word{border:0;background:transparent;cursor:pointer;font-size:12px;padding:2px}.vocab-main{display:grid;grid-template-columns:120px 1fr;gap:4px 10px;min-width:0}.vocab-main strong{font-size:12px;color:var(--accent2);word-break:break-word}.vocab-meaning{font-size:12px;color:var(--text);font-family:"Noto Sans Bengali",system-ui,sans-serif}.vocab-main small{grid-column:1/-1;color:var(--muted);font-size:9.5px;line-height:1.45}.vocab-main small em{font-family:"Noto Sans Bengali",system-ui,sans-serif;font-style:normal}.vocab-row.missing{color:var(--muted);font-size:11px}
.stf__parent{margin:auto}.stf__wrapper{box-shadow:0 32px 100px rgba(0,0,0,.42)}.stf__item{background:transparent!important}
body.reduced-motion *{scroll-behavior:auto!important}.reduced-motion .flipbook,.reduced-motion .stf__wrapper{transition:none!important}.reduced-motion .ambient i{animation:none!important}
.cover-social{display:flex;flex-wrap:wrap;gap:6px;margin-top:13px;max-width:510px}.cover-social a{font-size:9.5px;color:#d8e3f6;text-decoration:none;border:1px solid #2a3a5d;background:rgba(15,24,46,.58);padding:6px 8px;border-radius:999px}.cover-social a:hover{border-color:#6d7cff;color:#fff}.author-links{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}.author-links a{color:var(--accent2);text-decoration:none;border:1px solid var(--line);background:var(--panel2);border-radius:999px;padding:6px 8px;font-size:10px}.drawer-social{display:flex;flex-wrap:wrap;gap:6px}.drawer-social a{font-size:11px;color:var(--text);text-decoration:none;border:1px solid var(--line);background:var(--panel2);padding:6px 8px;border-radius:999px}.reader-account{display:flex;align-items:center;justify-content:space-between;gap:10px}.reader-account span{color:var(--muted);font-size:11px;overflow:hidden;text-overflow:ellipsis}.reader-account a{color:#fecdd3;text-decoration:none;font-size:11px}.book-page button,.book-page input,.book-page label,.book-page a,.book-page select,.book-page textarea{position:relative;z-index:8}.speak-word{touch-action:manipulation}.practice label{cursor:pointer}