/* Insights Flipbook */
.ifb{--ifb-accent:#c9a227;--ifb-bg:#12151b;--ifb-bg2:#1b2029;--ifb-fg:#eef1f6;--ifb-mut:#8f99aa;--ifb-line:rgba(255,255,255,.1);--ifb-glass:rgba(24,28,36,.82);
	position:relative;display:flex;flex-direction:column;height:var(--ifb-h,82vh);min-height:460px;color:var(--ifb-fg);border-radius:16px;overflow:hidden;
	background:radial-gradient(120% 90% at 50% 0%,#222a38 0%,var(--ifb-bg) 60%);font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.ifb[data-theme=light]{--ifb-bg:#e9edf3;--ifb-bg2:#fff;--ifb-fg:#18202e;--ifb-mut:#667085;--ifb-line:rgba(0,0,0,.1);--ifb-glass:rgba(255,255,255,.88);background:radial-gradient(120% 90% at 50% 0%,#fff 0%,var(--ifb-bg) 70%)}
.ifb *{box-sizing:border-box}
.ifb-noscript{margin:auto;padding:24px}.ifb-noscript a{color:var(--ifb-accent)}
.ifb-empty{padding:16px;border:1px dashed #ccc;border-radius:8px}

/* top & foot bars */
.ifb-top,.ifb-foot{display:flex;align-items:center;gap:6px;padding:8px 12px;background:var(--ifb-glass);backdrop-filter:blur(10px);z-index:6;border-color:var(--ifb-line);border-style:solid;border-width:0}
.ifb-top{border-bottom-width:1px}.ifb-foot{border-top-width:1px;gap:10px}
.ifb-title{flex:1;min-width:0;font-weight:600;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0 8px}
.ifb-b{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:0;border-radius:10px;background:transparent;color:inherit;cursor:pointer;transition:background .15s,color .15s;text-decoration:none;flex:0 0 auto}
.ifb-b:hover,.ifb-b:focus-visible{background:rgba(127,127,127,.2);color:var(--ifb-accent);outline:0}
.ifb-b[disabled]{opacity:.35;cursor:default}
.ifb-fb{width:34px;height:34px}
.ifb-range{flex:1;accent-color:var(--ifb-accent);height:4px;cursor:pointer}
.ifb-count{display:flex;align-items:center;gap:4px;color:var(--ifb-mut);font-variant-numeric:tabular-nums;white-space:nowrap}
.ifb-pin{width:64px;height:30px;text-align:center;border:1px solid var(--ifb-line);border-radius:8px;background:rgba(127,127,127,.12);color:var(--ifb-fg);font:inherit}
.ifb-pin:focus{outline:2px solid var(--ifb-accent)}

/* stage */
.ifb-main{position:relative;flex:1;min-height:0;display:flex}
.ifb-stage{flex:1;min-width:0;display:flex;overflow:auto;padding:18px 56px;scrollbar-width:thin}
.ifb-zoom{width:100%;height:100%;margin:auto;flex:0 0 auto;transition:width .25s,height .25s}
.ifb-book{width:100%;height:100%}
.ifb-page{background:#fff}
.ifb-pg{position:relative;width:100%;height:100%;background:#f4f4f5;overflow:hidden}
.ifb-pg img{width:100%;height:100%;object-fit:fill;opacity:0;transition:opacity .35s;user-select:none;-webkit-user-drag:none}
.ifb-pg.ifb-ok img{opacity:1}
.ifb-pspin{position:absolute;left:50%;top:50%;width:26px;height:26px;margin:-13px;border:3px solid #d5d7dc;border-top-color:var(--ifb-accent);border-radius:50%;animation:ifbspin .8s linear infinite}
.ifb-ok .ifb-pspin{display:none}
.ifb .stf__parent{margin:auto}
.ifb-arrow{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:64px;background:var(--ifb-glass);z-index:4;border-radius:12px;opacity:.85}
.ifb-arrow-l{left:8px}.ifb-arrow-r{right:8px}

/* loader */
.ifb-loader{position:absolute;inset:0;z-index:8;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:var(--ifb-bg);transition:opacity .4s,visibility .4s;color:var(--ifb-mut)}
.ifb-loader.ifb-hide{opacity:0;visibility:hidden}
.ifb-spinner{width:44px;height:44px;border:4px solid var(--ifb-line);border-top-color:var(--ifb-accent);border-radius:50%;animation:ifbspin .8s linear infinite}
.ifb-lbar{width:200px;height:4px;border-radius:4px;background:var(--ifb-line);overflow:hidden}.ifb-lbar i{display:block;height:100%;width:0;background:var(--ifb-accent);transition:width .2s}
.ifb-loader a{color:var(--ifb-accent)}
@keyframes ifbspin{to{transform:rotate(360deg)}}

/* side panel */
.ifb-panel{position:absolute;left:0;top:0;bottom:0;width:320px;max-width:88%;z-index:7;background:var(--ifb-bg2);border-right:1px solid var(--ifb-line);transform:translateX(-102%);transition:transform .28s ease;display:flex;flex-direction:column;box-shadow:12px 0 40px rgba(0,0,0,.3)}
.ifb-panel[data-open]{transform:none}
.ifb-ptabs{display:flex;align-items:center;gap:2px;padding:8px;border-bottom:1px solid var(--ifb-line)}
.ifb-ptabs button[data-tab]{flex:1;padding:8px 6px;border:0;background:none;color:var(--ifb-mut);font:600 13px inherit;font-family:inherit;border-radius:8px;cursor:pointer}
.ifb-panel[data-open=pages] [data-tab=pages],.ifb-panel[data-open=toc] [data-tab=toc],.ifb-panel[data-open=search] [data-tab=search]{background:rgba(127,127,127,.18);color:var(--ifb-accent)}
.ifb-pclose{width:32px;height:32px}
.ifb-pbody{display:none;flex:1;overflow:auto;padding:12px}
.ifb-panel[data-open=pages] .ifb-t-pages,.ifb-panel[data-open=toc] .ifb-t-toc,.ifb-panel[data-open=search] .ifb-t-search{display:block}
.ifb-thgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.ifb-th{position:relative;padding:0;border:2px solid transparent;border-radius:6px;background:#fff;cursor:pointer;overflow:hidden;aspect-ratio:3/4;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.ifb-th img{width:100%;height:100%;object-fit:cover;display:block}
.ifb-th em{position:absolute;left:0;right:0;bottom:0;padding:2px 0;font:600 11px system-ui;font-style:normal;color:#fff;background:rgba(0,0,0,.55)}
.ifb-th.on,.ifb-th:hover{border-color:var(--ifb-accent)}
.ifb-muted{color:var(--ifb-mut);margin:6px 2px}
.ifb-toc,.ifb-toc ul{list-style:none;margin:0;padding:0}.ifb-toc ul{padding-left:14px}
.ifb-toc button{display:block;width:100%;text-align:left;padding:8px 8px;border:0;border-radius:6px;background:none;color:inherit;font:inherit;cursor:pointer}
.ifb-toc button:hover{background:rgba(127,127,127,.18);color:var(--ifb-accent)}
.ifb-sform{display:flex;gap:6px;margin-bottom:10px}
.ifb-sform input{flex:1;min-width:0;padding:9px 10px;border:1px solid var(--ifb-line);border-radius:8px;background:rgba(127,127,127,.12);color:inherit;font:inherit}
.ifb-sform button{padding:0 14px;border:0;border-radius:8px;background:var(--ifb-accent);color:#111;font-weight:700;cursor:pointer}
.ifb-sres button{display:block;width:100%;text-align:left;padding:9px 10px;margin-bottom:6px;border:1px solid var(--ifb-line);border-radius:8px;background:none;color:inherit;cursor:pointer;font:inherit}
.ifb-sres button:hover{border-color:var(--ifb-accent)}
.ifb-sres b{display:block;font-size:12px;color:var(--ifb-accent)}.ifb-sres span{font-size:13px;color:var(--ifb-mut)}
.ifb-sres mark{background:var(--ifb-accent);color:#111;border-radius:2px;padding:0 2px}

/* share popover */
.ifb-share{position:absolute;right:12px;top:10px;z-index:9;display:flex;flex-direction:column;gap:2px;min-width:190px;padding:10px;background:var(--ifb-bg2);border:1px solid var(--ifb-line);border-radius:12px;box-shadow:0 14px 40px rgba(0,0,0,.4)}
.ifb-share[hidden]{display:none}
.ifb-share strong{padding:2px 8px 8px;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--ifb-mut)}
.ifb-share a,.ifb-share button{display:block;padding:8px 10px;border:0;border-radius:8px;background:none;color:inherit;text-align:left;font:inherit;cursor:pointer;text-decoration:none}
.ifb-share a:hover,.ifb-share button:hover{background:rgba(127,127,127,.18);color:var(--ifb-accent)}

/* fullscreen */
.ifb.ifb-fs{position:fixed;inset:0;z-index:999999;height:100%!important;border-radius:0}
html.ifb-noscroll{overflow:hidden}

/* responsive */
@media(max-width:700px){
	.ifb-hide-s,.ifb-range{display:none}
	.ifb-stage{padding:10px 8px}.ifb-arrow{display:none}
	.ifb-foot{justify-content:center}
	.ifb{border-radius:0;min-height:420px}
}

/* single flipbook page: hero + wrappers */
.ifb-hero{background:#000;color:#fff;text-align:center;padding:56px 20px 0}
.ifb-hero-in{max-width:900px;margin:0 auto}
.ifb-kicker{display:inline-block;margin-bottom:10px;font:700 12px system-ui;letter-spacing:.14em;text-transform:uppercase;color:#c9a227}
.ifb-hero h1{font-family:'Playfair Display',Georgia,serif;font-size:clamp(28px,5vw,48px);line-height:1.15;margin:0 0 16px;color:#fff}
.ifb-hero-ex{font-size:18px;line-height:1.7;color:#d5d9e0;margin:0 0 26px}
.ifb-btn{display:inline-block;padding:14px 34px;background:#fff;color:#000;font-weight:700;border-radius:8px;text-decoration:none;transition:transform .15s,background .15s}
.ifb-btn:hover{transform:translateY(-2px);background:#c9a227;color:#000}
.ifb-hero-cover{margin:40px auto 0;max-width:420px;transform:translateY(40px);filter:drop-shadow(0 24px 40px rgba(0,0,0,.6))}
.ifb-hero-cover img{width:100%;height:auto;display:block;border-radius:4px}
.ifb-reader-wrap{max-width:1300px;margin:80px auto 40px;padding:0 16px}
.ifb-below{max-width:900px;margin:0 auto 60px;padding:0 20px}
.ifb-arch-title{font-family:'Playfair Display',Georgia,serif;margin:40px 0 24px}
.ifb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:30px}
.ifb-card{display:block;text-decoration:none;color:inherit}
.ifb-card-cover{display:block;aspect-ratio:3/4;background:#e5e7eb;border-radius:4px;overflow:hidden;box-shadow:0 10px 28px rgba(0,0,0,.2);transition:transform .25s;margin-bottom:12px}
.ifb-card:hover .ifb-card-cover{transform:translateY(-6px)}
.ifb-card-cover img{width:100%;height:100%;object-fit:cover}
.ifb-card small{display:block;color:#667085}
.ifb-pager{margin-top:30px;text-align:center}