/* ============ BUCH ============ */
.bk-hero{background:var(--bg);padding:70px 0 76px;position:relative;overflow:hidden;}
.bk-hero .in{max-width:1100px;margin:0 auto;padding:0 40px;
  display:grid;grid-template-columns:0.8fr 1.2fr;gap:60px;align-items:center;}
.bk-cover-wrap{position:relative;}
.bk-cover{width:100%;border-radius:8px;display:block;
  box-shadow:0 30px 60px -22px rgba(13,34,48,.55);}
.bk-flag{position:absolute;top:18px;right:-14px;background:var(--orange);color:#fff;
  font-family:var(--f);font-weight:800;font-size:12.5px;letter-spacing:.04em;
  padding:9px 16px;border-radius:6px;box-shadow:0 8px 20px -8px rgba(247,116,5,.7);
  text-transform:uppercase;}
.bk-hero h1{font-family:var(--f);font-weight:900;font-size:44px;line-height:1.08;
  color:var(--ink);margin-bottom:14px;}
.bk-hero h1 .hl{color:var(--blue);}
.bk-sub{font-family:var(--f);font-weight:700;font-size:18px;line-height:1.45;
  color:var(--ink);margin-bottom:18px;}
.bk-lead{font-size:16.5px;line-height:1.68;color:var(--muted);margin-bottom:24px;}
.bk-stars{display:flex;align-items:center;gap:10px;margin-bottom:22px;}
.stars{position:relative;display:inline-block;font-size:17px;letter-spacing:2px;line-height:1;
  color:rgba(247,116,5,.25);}
.stars::before{content:"\2605\2605\2605\2605\2605";}
.stars::after{content:"\2605\2605\2605\2605\2605";position:absolute;left:0;top:0;
  width:var(--r);overflow:hidden;color:var(--orange);white-space:nowrap;}
.stars.big{font-size:26px;}
.bk-stars b{color:var(--ink);}
.bk-proof{background:#fff;border-radius:16px;padding:38px 34px;text-align:center;
  box-shadow:0 18px 40px -22px rgba(13,34,48,.35);border-top:4px solid var(--orange);}
.bk-proof-nr{font-family:var(--f);font-weight:900;font-size:64px;line-height:1;color:var(--orange);}
.bk-proof-t{font-family:var(--f);font-weight:800;font-size:18px;line-height:1.35;color:var(--ink);
  margin-top:10px;}
.bk-proof-line{width:60px;height:2px;background:var(--line);margin:24px auto;}
.bk-proof-rating{display:flex;align-items:center;justify-content:center;gap:10px;}
.bk-proof-rating b{font-family:var(--f);font-weight:900;font-size:30px;color:var(--ink);}
.bk-proof-rating span:last-child{font-size:14px;color:var(--muted);}
.bk-proof-count{font-size:14.5px;color:var(--muted);margin-top:6px;}
.bk-proof-link{display:inline-block;margin-top:20px;font-family:var(--f);font-weight:700;
  font-size:14.5px;color:var(--blue);}
.bk-stars span{font-size:14px;color:var(--muted);}
.bk-price{font-family:var(--f);font-weight:900;font-size:26px;color:var(--ink);margin-bottom:18px;}
.bk-price small{font-family:var(--body);font-weight:400;font-size:14px;color:var(--muted);
  display:block;margin-top:4px;}
.bk-acts{display:flex;gap:14px;flex-wrap:wrap;}
.bk-btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--f);font-weight:700;
  font-size:15.5px;background:var(--orange);color:#fff;padding:15px 30px;border-radius:10px;
  box-shadow:0 12px 26px -12px rgba(247,116,5,.6);transition:background .2s,transform .2s;}
.bk-btn:hover{background:var(--orange-dk);transform:translateY(-2px);}
.bk-btn.ghost{background:#fff;color:var(--ink);border:1.5px solid rgba(29,40,61,.18);box-shadow:none;}
.bk-btn.ghost:hover{background:#fff;border-color:var(--ink);transform:none;}

.bk-sec{padding:72px 0;}
.bk-sec .in{max-width:1100px;margin:0 auto;padding:0 40px;}
.bk-sec.white{background:#fff;}
.bk-sec.grey{background:var(--bg);}
.bk-sec p{font-size:16px;line-height:1.7;color:var(--muted);margin-bottom:14px;}
.bk-sec p b{color:var(--ink);}

.bk-for{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px;}
.bk-for div{background:#fff;border-radius:12px;padding:26px 24px;border-top:3px solid var(--blue);
  box-shadow:0 6px 18px -12px rgba(13,34,48,.22);}
.bk-for b{display:block;font-family:var(--f);font-weight:800;font-size:16.5px;color:var(--ink);
  margin-bottom:7px;}
.bk-for span{font-size:14.5px;line-height:1.6;color:var(--muted);}

.bk-content{list-style:none;margin:30px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.bk-content li{position:relative;padding-left:32px;font-size:15.5px;line-height:1.6;
  color:var(--muted);}
.bk-content li::before{content:"\2713";position:absolute;left:0;top:0;
  font-family:var(--f);font-weight:900;color:var(--blue);font-size:15px;}

.bk-split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;}
.bk-split img{width:100%;border-radius:12px;display:block;
  box-shadow:0 14px 34px -18px rgba(13,34,48,.3);}

.bk-revgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px;}
.bk-rev{background:#fff;border-radius:14px;padding:26px 24px;text-align:center;
  border:1px solid var(--line);box-shadow:0 8px 22px -16px rgba(13,34,48,.3);}
.bk-rev .s{color:var(--orange);font-size:14px;letter-spacing:2px;display:block;margin-bottom:12px;}
.bk-rev q{display:block;font-family:var(--f);font-weight:800;font-size:17px;line-height:1.35;
  color:var(--ink);margin-bottom:14px;quotes:"\201E" "\201C";}
.bk-rev cite{font-style:normal;font-family:var(--f);font-weight:700;font-size:13px;
  color:var(--blue);display:block;}
.bk-rev cite small{display:block;font-family:var(--body);font-weight:400;font-size:12.5px;
  color:var(--muted);margin-top:3px;}

.bk-authors{background:#fff;border-radius:14px;padding:28px 32px;margin-top:38px;
  display:flex;gap:22px;align-items:center;flex-wrap:wrap;}
.bk-authors img{width:120px;height:120px;border-radius:50%;object-fit:cover;
  object-position:center 15%;border:4px solid #fff;
  box-shadow:0 8px 20px -8px rgba(13,34,48,.4);flex-shrink:0;}
.bk-authors p{flex:1;min-width:260px;margin:0;font-size:15px;line-height:1.65;}

.bk-cta{background:linear-gradient(135deg,var(--ink) 0%,#101a2b 100%);padding:70px 0;
  text-align:center;}
.bk-cta .in{max-width:760px;margin:0 auto;padding:0 40px;}
.bk-cta h2{font-family:var(--f);font-weight:900;font-size:32px;color:#fff;margin-bottom:12px;}
.bk-cta p{font-size:16.5px;line-height:1.6;color:rgba(255,255,255,.85);margin-bottom:28px;}
.bk-cta .bk-btn{background:var(--orange);color:#fff;}
.bk-cta .bk-btn:hover{background:var(--orange-dk);}
.bk-bonus{font-size:14px;color:rgba(255,255,255,.7);margin-top:22px;margin-bottom:0;}

@media(max-width:900px){
  .bk-hero .in{grid-template-columns:1fr;gap:38px;}
  .bk-cover-wrap{max-width:280px;margin:0 auto;}
  .bk-for,.bk-revgrid{grid-template-columns:1fr;}
  .bk-content{grid-template-columns:1fr;}
  .bk-split{grid-template-columns:1fr;gap:30px;}
}
@media(max-width:640px){
  .bk-hero .in,.bk-sec .in,.bk-cta .in{padding:0 20px;}
  .bk-hero h1{font-size:32px;}
  .bk-cta h2{font-size:26px;}
}