*{box-sizing:border-box}
body{background:#fff7ed;color:#1f2937;margin:0;min-height:100vh;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.page{max-width:680px;margin:0 auto;padding:34px 20px 84px}
.back{display:inline-flex;align-items:center;gap:6px;color:#c23f15;
 text-decoration:none;font-size:14px;font-weight:600;margin-bottom:20px}
.back:hover{color:#e85d2a}
h1{font-size:25px;font-weight:800;margin:0 0 6px}
.sub{font-size:13.5px;color:#6b7280;margin:0 0 22px;line-height:1.55}
.pid{font:700 12px ui-monospace,SFMono-Regular,Menlo,monospace;color:#c23f15;
 background:#ffedd5;border-radius:7px;padding:5px 9px;flex-shrink:0}
.sec-h{font-size:13px;font-weight:800;color:#c23f15;margin:24px 0 10px;
 padding-bottom:7px;border-bottom:2px solid #fed7aa}
/* landing book card */
.bcard{display:flex;align-items:center;gap:14px;background:#fff;
 border:1.5px solid #fed7aa;border-radius:14px;padding:16px;text-decoration:none;
 color:inherit;transition:border-color .14s,transform .14s}
.bcard:hover{border-color:#e85d2a;transform:translateY(-2px);
 box-shadow:0 4px 14px rgba(232,93,42,.13)}
.bcover{width:54px;height:70px;border-radius:8px;background:#e85d2a;color:#fff;
 display:flex;flex-direction:column;align-items:center;justify-content:center;
 flex-shrink:0;font-weight:800;line-height:1.2}
.bcover .n{font-size:20px}
.bcover .t{font-size:9px;letter-spacing:.5px}
.binfo{flex:1;min-width:0}
.btitle{font-size:15.5px;font-weight:800;color:#1f2937}
.bdesc{font-size:12.5px;color:#6b7280;margin-top:2px}
.bbadges{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.bbadge{font-size:10.5px;font-weight:700;color:#c23f15;background:#fff7ed;
 border:1px solid #fed7aa;border-radius:999px;padding:3px 8px}
.bbadge.max{color:#fff;background:#c23f15;border-color:#c23f15}
.barrow{color:#e85d2a;font-size:20px;font-weight:700;flex-shrink:0}
/* detail */
.dh-title{font-size:22px;font-weight:800;line-height:1.3}
.dh-badge{display:inline-block;font-size:11px;font-weight:800;color:#c23f15;
 background:#ffedd5;border-radius:999px;padding:3px 10px;margin-bottom:8px}
.feat{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 22px}
.feat span{font-size:12px;font-weight:600;color:#4b5563;background:#fff;
 border:1.5px solid #fed7aa;border-radius:9px;padding:7px 11px}
.card{background:#fff;border:1.5px solid #fed7aa;border-radius:14px;padding:16px;margin:0 0 16px}
.card h2{font-size:15px;font-weight:800;color:#c23f15;margin:0 0 3px}
.card .csub{font-size:12px;color:#9ca3af;margin:0 0 13px}
.preview-bar{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:12px}
.preview-bar button{width:34px;height:34px;border-radius:8px;border:1.5px solid #fed7aa;
 background:#fff7ed;color:#c23f15;font-size:16px;font-weight:800;cursor:pointer}
.preview-bar button:hover{border-color:#e85d2a}
.preview-bar button:disabled{opacity:.4;cursor:default}
#pv-count{font-size:13px;font-weight:700;color:#6b7280;min-width:74px;text-align:center}
#pv-canvas{display:block;width:100%;height:auto;border-radius:8px;
 box-shadow:0 1px 8px rgba(0,0,0,.12);background:#fff}
.full-grid{display:flex;flex-direction:column;gap:8px}
.full-item{display:flex;align-items:center;gap:12px;border:1.5px solid #fed7aa;
 border-radius:11px;padding:12px 14px;text-decoration:none;color:#1f2937;
 font-weight:700;font-size:14px;transition:border-color .13s,background .13s}
.full-item:hover{border-color:#e85d2a;background:#fff7ed}
.full-item .ic{font-size:20px;flex-shrink:0}
.full-item .meta{flex:1;min-width:0}
.full-item .meta small{display:block;font-size:11.5px;font-weight:500;color:#9ca3af;margin-top:1px}
.full-item.locked{opacity:.55}
.full-lock{margin-top:12px;font-size:12.5px;color:#c23f15;background:#fff7ed;
 border:1.5px dashed #fed7aa;border-radius:10px;padding:12px 13px;text-align:center;line-height:1.6}
.full-lock a{color:#c23f15;font-weight:800}
.callout{background:#c23f15;color:#fff;border-radius:14px;padding:16px 18px;
 font-size:13px;line-height:1.6}
.callout a{color:#fff;font-weight:800}
/* audio index rows */
.vol{font-size:14px;font-weight:800;color:#c23f15;margin:24px 0 10px;
 padding-bottom:7px;border-bottom:2px solid #fed7aa}
.row{display:flex;align-items:center;gap:12px;background:#fff;border:1.5px solid #fed7aa;
 border-radius:11px;padding:11px 14px;margin-bottom:7px;text-decoration:none;
 color:inherit;transition:border-color .13s,transform .13s}
.row:hover{border-color:#e85d2a;transform:translateX(2px)}
.row .m{flex:1;min-width:0}
.row .es{font-size:15px;font-weight:700}
.row .ko{font-size:12.5px;color:#6b7280;margin-top:1px}
.row .arr{color:#e85d2a;font-size:13px}
/* pattern page */
.pos{font-size:12px;color:#9ca3af;font-weight:600;margin-bottom:10px}
.pat-head{display:flex;align-items:center;gap:13px;margin-bottom:14px}
.pat-head .es{font-size:22px;font-weight:800;line-height:1.25}
.pat-head .ko{font-size:14px;color:#6b7280;margin-top:3px}
.meaning{font-size:14px;line-height:1.65;color:#4b5563;background:#fff;
 border:1.5px solid #fed7aa;border-radius:12px;padding:13px 15px;margin:0 0 22px}
.track{background:#fff;border:1.5px solid #fed7aa;border-radius:14px;
 padding:16px;margin-bottom:14px;transition:border-color .15s,box-shadow .15s}
.track.cued{border-color:#e85d2a;box-shadow:0 3px 12px rgba(232,93,42,.18)}
.track-label{display:flex;align-items:baseline;gap:9px;margin-bottom:11px}
.track-label .nm{font-size:15px;font-weight:800;color:#c23f15}
.track-label .tnote{font-size:12px;color:#9ca3af}
.track audio{width:100%;height:40px}
.script{margin:13px 0 0;padding-left:22px;display:flex;flex-direction:column;gap:5px}
.script li{font-size:13.5px;color:#374151;line-height:1.5}
.pnav{display:flex;justify-content:space-between;gap:10px;margin-top:24px}
.pnav a{flex:1;text-align:center;background:#fff;border:1.5px solid #fed7aa;
 border-radius:10px;padding:11px;text-decoration:none;color:#c23f15;
 font-weight:700;font-size:13.5px}
.pnav a:hover{border-color:#e85d2a}
.pnav a.disabled{visibility:hidden}
/* page language selector (top-right, injected by books.js) */
.books-lang-wrap{position:fixed;top:14px;right:14px;z-index:60}
.books-lang-sel{font-size:13px;font-weight:600;color:#1f2937;background:#fff;
 border:1.5px solid #fed7aa;border-radius:9px;padding:6px 10px;cursor:pointer;
 box-shadow:0 1px 6px rgba(0,0,0,.08);max-width:170px}
.books-lang-sel:hover{border-color:#e85d2a}