.bkcat{max-width:1100px;margin:0 auto;padding:72px 2rem 120px}.bkcat-hero{display:grid;grid-template-columns:340px 1fr;grid-gap:clamp(2rem,5vw,4.5rem);gap:clamp(2rem,5vw,4.5rem);align-items:center}.bkcat-cover img{display:block;width:100%;height:auto;border:1px solid var(--br2,#272727);border-radius:18px;box-shadow:0 30px 70px rgba(0,0,0,.55),0 0 0 1px rgba(255,208,0,.12);background:#0d0d0d}.bkcat-meta{font-family:var(--fm,"JetBrains Mono",monospace);font-size:.6rem;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--t2);margin:0 0 1.5rem;display:inline-flex;align-items:center;gap:.55rem;padding:.35rem .85rem;border:1px solid var(--br2);border-radius:999px}.bkcat-meta:before{content:"";width:5px;height:5px;border-radius:50%;background:var(--a,#ffd000);flex-shrink:0;animation:blink 2.5s ease-in-out infinite}.bkcat-title{margin:0 0 1rem;font-size:clamp(2.4rem,5.2vw,4.2rem);font-weight:800;line-height:.95;letter-spacing:-.045em;text-transform:uppercase;color:var(--t,#edeae3)}.bkcat-tagline,.bkcat-title{font-family:var(--fd,"Syne",sans-serif)}.bkcat-tagline{margin:0 0 1.4rem;font-size:clamp(1.1rem,2.2vw,1.45rem);font-weight:600;line-height:1.3;letter-spacing:-.015em;color:#c9c5bd}.bkcat-desc{margin:0 0 1.6rem;max-width:560px;font-family:var(--fs,"Instrument Serif",serif);font-size:1.05rem;line-height:1.8;color:var(--t2,#b0aba3)}.bkcat-author{margin:0 0 1.8rem;font-family:var(--fm,"JetBrains Mono",monospace);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--t2,#b0aba3)}.bkcat-author strong{color:var(--t,#edeae3);font-weight:500}.bkcat-cta{display:flex;gap:.85rem;flex-wrap:wrap}.bkcat-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.9rem 1.6rem;border-radius:11px;font-family:var(--fd,"Syne",sans-serif);font-size:.9rem;font-weight:700;text-decoration:none;transition:transform .2s var(--ease,cubic-bezier(.16,1,.3,1)),box-shadow .2s ease,opacity .2s ease}.bkcat-btn:hover{transform:translateY(-2px)}.bkcat-btn-read{background:var(--a,#ffd000);color:#0a0a0a;box-shadow:0 12px 30px rgba(255,208,0,.22)}.bkcat-btn-read:hover{box-shadow:0 18px 40px rgba(255,208,0,.32)}.bkcat-btn-tg{background:transparent;color:var(--t,#edeae3);border:1px solid var(--br2,#272727)}.bkcat-btn-tg:hover{border-color:rgba(255,208,0,.5)}.bkcat-intro{max-width:760px;margin:clamp(3rem,6vw,5rem) 0 0;padding-top:2.5rem;padding-bottom:0;border-top:1px solid var(--br,#1e1e1e)}.bkcat-intro p{font-family:var(--fs,"Instrument Serif",serif);font-size:1.1rem;line-height:1.85;color:#b8b3ac;margin:0 0 1.4rem}.bkcat-intro p strong{color:var(--t,#edeae3);font-weight:600}.bkcat-chapters{margin-top:0}.bkcat-chapters-label{font-family:var(--fm,"JetBrains Mono",monospace);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--a,#ffd000);margin:0 0 .9rem}.bkcat-chapters-title{margin:0 0 2.2rem;font-family:var(--fd,"Syne",sans-serif);font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;color:var(--t,#edeae3);max-width:640px}.bkcat-grid{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:1.25rem;gap:1.25rem}.bkcat-card{--cc:var(--a,#ffd000);display:flex;flex-direction:column;gap:.7rem;padding:1.7rem 1.8rem;background:var(--bgc,#111);border:1px solid var(--br,#1e1e1e);border-top:3px solid var(--cc);border-radius:14px;text-decoration:none;transition:border-color .25s ease,background .25s ease,transform .25s var(--ease,cubic-bezier(.16,1,.3,1))}.bkcat-card:hover{border-color:color-mix(in srgb,var(--cc) 45%,var(--br,#1e1e1e));border-top-color:var(--cc);background:var(--bgc2,#161616);transform:translateY(-3px)}.bkcat-card-icon{font-size:1.6rem;line-height:1}.bkcat-card-num{font-family:var(--fm,"JetBrains Mono",monospace);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cc)}.bkcat-card-title{margin:0;font-family:var(--fd,"Syne",sans-serif);font-size:1.3rem;font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--t,#edeae3)}.bkcat-card-desc{margin:0;font-family:var(--fs,"Instrument Serif",serif);font-size:1.05rem;line-height:1.6;color:var(--t2,#b0aba3);flex:1 1}.bkcat-card-cta{font-family:var(--fd,"Syne",sans-serif);font-size:.9rem;font-weight:700;color:var(--t,#edeae3);display:inline-flex;align-items:center;gap:.35rem}.bkcat-card:hover .bkcat-card-cta{color:var(--cc)}@media (max-width:860px){.bkcat-hero{grid-template-columns:1fr}.bkcat-cover{max-width:300px}.bkcat-grid{grid-template-columns:1fr}}@media (max-width:560px){.bkcat{padding:48px 1.25rem 80px}.bkcat-cover{max-width:240px;margin:0 auto}}