/* Archemap — the books catalog and the book store page (docs/design_handoff_books).
   Everything is scoped under .bk so the site's own nav and footer are untouched. */

.bk{--ink:#160f29;--cream:#fbf8f1;--band:#f3ecdf;--gold:#cf9526;--gold-2:#e0a832;--gold-t:#b07d18;--violet:#5a3cf0;--violet-2:#7a56e0;--lilac:#c3aeff;--body:#524b63;--label:#6b6480;--line:rgba(22,15,41,.12);
  position:relative;background:var(--cream);color:var(--ink);font-family:'Figtree',system-ui,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden;overflow-x:clip}
.bk *,.bk *::before,.bk *::after{box-sizing:border-box}
.bk a{color:var(--violet);text-decoration:none}
.bk a:hover{color:var(--ink)}
.bk button,.bk input,.bk select{font-family:inherit}
.bk-grain{position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.5;background-image:radial-gradient(rgba(22,15,41,.16) .5px,transparent .5px);background-size:3px 3px;mix-blend-mode:multiply}
.bk-wrap{max-width:1280px;margin:0 auto;padding:0 clamp(20px,4vw,56px);position:relative;z-index:2}
.bk-band-top{position:absolute;top:0;left:0;right:0;height:min(820px,100vh);background:linear-gradient(180deg,#f3ecdf 0%,#f8f3e8 50%,#fbf8f1 100%);z-index:0;pointer-events:none}
.bk-band-top.lilac{background:linear-gradient(180deg,#ece4f3 0%,#f6f1ee 55%,#fbf8f1 100%)}
@keyframes bk-rise{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
@keyframes bk-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes bk-float3d{0%,100%{transform:rotateY(-18deg) rotateX(4deg) translateY(0)}50%{transform:rotateY(-14deg) rotateX(3deg) translateY(-10px)}}
.bk .rv{animation:bk-rise .9s cubic-bezier(.2,.75,.25,1) both}
@media (prefers-reduced-motion:reduce){.bk .rv,.bk-fan>div,.bk-3d{animation:none!important}}

/* type */
.bk-mono{font-family:'JetBrains Mono',ui-monospace,monospace;letter-spacing:.12em;text-transform:uppercase}
.bk-serif{font-family:'Newsreader',Georgia,serif}
.bk-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:0 9px;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--label);padding-top:clamp(12px,2vw,20px)}
.bk-crumb a,.bk-crumb span{padding:11px 0;display:inline-flex;align-items:center;min-height:44px;white-space:nowrap;color:inherit}
.bk-crumb a:hover{color:var(--ink)}
.bk-crumb .sep{opacity:.45}
.bk-crumb .here{color:var(--ink);white-space:normal}
.bk-h1{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(40px,6.4vw,82px);line-height:.98;letter-spacing:-.03em;margin:clamp(18px,2.6vw,28px) 0 0;text-wrap:balance}
.bk-h1 em{font-style:italic;font-weight:300;color:var(--violet)}
.bk-h2{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(30px,4.4vw,52px);line-height:1.04;letter-spacing:-.024em;margin:0}
.bk-lede{font-size:clamp(16.5px,1.6vw,19px);line-height:1.62;color:var(--body);max-width:46ch;margin:clamp(16px,2.2vw,24px) 0 0;text-wrap:pretty}
.bk-kick{display:flex;align-items:baseline;gap:14px;font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label)}
.bk-kick .n{color:var(--gold)}
.bk-kick .rule{flex:1;height:1px;background:var(--line)}
.bk-dark .bk-kick{color:rgba(242,238,230,.55)}
.bk-dark .bk-kick .n{color:var(--gold-2)}
.bk-dark .bk-kick .rule{background:rgba(242,238,230,.16)}
.bk-pill{display:inline-flex;align-items:center;gap:9px;font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--label);border:1px solid rgba(22,15,41,.14);border-radius:999px;padding:7px 14px}
.bk-pill .dot{width:6px;height:6px;border-radius:999px;background:var(--gold);display:block}
.bk-section{padding-bottom:clamp(56px,8vw,110px)}

/* covers drawn in CSS until real cover art exists */
.bk-cover{aspect-ratio:2/3;border-radius:4px 10px 10px 4px;padding:13% 11%;display:flex;flex-direction:column;position:relative;overflow:hidden;box-shadow:0 18px 34px rgba(22,15,41,.22),inset 5px 0 0 rgba(0,0,0,.12)}
.bk-cover .k{font-family:'JetBrains Mono',monospace;font-size:8px;letter-spacing:.16em;text-transform:uppercase;opacity:.75}
.bk-cover .disc{display:block;width:34%;aspect-ratio:1;border-radius:999px;margin:16% auto 0}
.bk-cover .disc svg,.bk-bigcover .disc svg{width:100%;height:100%}
.bk-cover .t{font-family:'Newsreader',serif;font-size:clamp(14px,1.5vw,18px);line-height:1.08;margin-top:auto;text-align:center}
.bk-cover .a{font-family:'JetBrains Mono',monospace;font-size:7.5px;letter-spacing:.18em;text-transform:uppercase;text-align:center;margin-top:8px;opacity:.7}

/* catalog hero */
.bk-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,64px);align-items:center;padding-top:clamp(8px,2vw,24px);padding-bottom:clamp(40px,6vw,80px)}
.bk-search{display:flex;align-items:center;gap:12px;max-width:480px;margin-top:clamp(22px,3vw,32px);background:#fff;border:1px solid rgba(22,15,41,.14);border-radius:14px;padding:0 8px 0 18px;min-height:58px;box-shadow:0 14px 34px rgba(22,15,41,.06)}
.bk-search .ico{font-size:18px;color:var(--label)}
.bk-search input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:16px;color:var(--ink);padding:16px 0}
.bk-search a{background:var(--ink);color:var(--cream)!important;font-weight:600;font-size:15px;padding:12px 18px;border-radius:10px;white-space:nowrap}
.bk-search a:hover{background:var(--violet)}
.bk-facts{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:20px;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--label)}
.bk-fan{position:relative;height:clamp(340px,40vw,500px)}
.bk-fan .glow{position:absolute;inset:8% 10%;border-radius:999px;background:radial-gradient(circle,rgba(224,168,50,.3),transparent 66%);filter:blur(40px)}
.bk-fan>div.f{position:absolute;top:50%;left:50%;width:clamp(170px,19vw,240px)}
.bk-fan>div.f .bk-cover{border-radius:6px 14px 14px 6px;padding:12% 11%;box-shadow:0 34px 60px rgba(22,15,41,.28),inset 6px 0 0 rgba(0,0,0,.14),inset 7px 0 0 rgba(255,255,255,.12)}
.bk-fan>div.f .bk-cover .k{font-size:9px}
.bk-fan>div.f .bk-cover .disc{width:38%;margin-top:18%;box-shadow:0 0 0 1px rgba(255,255,255,.22),0 0 0 7px transparent,0 0 0 8px rgba(255,255,255,.22)}
.bk-fan>div.f .bk-cover .t{font-size:clamp(18px,2vw,24px)}
.bk-fan>div.f1{translate:-112% -46%;rotate:-11deg;z-index:1;animation:bk-float 9s ease-in-out infinite}
.bk-fan>div.f2{translate:-50% -54%;z-index:3;animation:bk-float 8s ease-in-out infinite .6s}
.bk-fan>div.f3{translate:12% -46%;rotate:10deg;z-index:2;animation:bk-float 10s ease-in-out infinite 1.2s}

/* catalog grid */
.bk-cathead{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin:clamp(18px,2.6vw,28px) 0 clamp(18px,2.4vw,26px)}
.bk-sort{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--label)}
.bk-sort select{min-height:44px;border:1px solid rgba(22,15,41,.14);border-radius:10px;background:#fff;padding:0 12px;font-size:14.5px;color:var(--ink)}
.bk-chips{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.bk-chips::-webkit-scrollbar{display:none}
.bk-chip{flex:none;min-height:44px;padding:10px 16px;border-radius:999px;border:1px solid rgba(22,15,41,.14);background:#fff;font-size:14.5px;font-weight:500;color:var(--ink);cursor:pointer;white-space:nowrap;transition:background .2s,color .2s,border-color .2s}
.bk-chip[aria-pressed="true"]{background:var(--ink);color:var(--cream);border-color:var(--ink)}
.bk-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,2.4vw,32px);margin-top:clamp(22px,3vw,34px)}
.bk-card{display:flex;flex-direction:column;background:#fff;border:1px solid rgba(22,15,41,.1);border-radius:20px;padding:clamp(16px,1.8vw,22px);color:var(--ink)!important;transition:transform .35s cubic-bezier(.2,.75,.25,1),box-shadow .35s,border-color .35s}
.bk-card:hover{transform:translateY(-4px);box-shadow:0 26px 54px rgba(22,15,41,.11);border-color:rgba(207,149,38,.45)}
.bk-card[hidden]{display:none}
.bk-card .shelf{position:relative;margin:-2px -2px 18px;border-radius:14px;padding:clamp(18px,2.4vw,28px) 22%}
.bk-card .bk-cover{transition:transform .5s cubic-bezier(.2,.75,.25,1)}
.bk-card:hover .bk-cover{transform:rotate(-1.5deg) scale(1.02)}
.bk-card .badge{position:absolute;top:12px;left:12px;background:var(--ink);color:var(--cream);font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;padding:6px 10px;border-radius:999px}
.bk-card .body{display:flex;flex-direction:column;flex:1;min-width:0}
.bk-card .meta{font-family:'JetBrains Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--label)}
.bk-card h3{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(20px,2vw,24px);line-height:1.15;margin:8px 0 0}
.bk-card .by{font-size:14px;color:var(--label);margin-top:2px}
.bk-card p{font-size:15px;line-height:1.55;color:var(--body);margin:8px 0 0}
.bk-card .price{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 12px;margin-top:auto;padding-top:16px}
.bk-card .price b{font-family:'Newsreader',serif;font-weight:400;font-size:24px;line-height:1}
.bk-card .price s{font-size:14px;color:var(--label)}
.bk-card .price .soon{font-size:13px;font-weight:600;color:var(--gold-t)}
.bk-card .price .plus{font-size:13px;font-weight:600;color:var(--violet)}
.bk-empty{text-align:center;padding:60px 20px;border:1px dashed rgba(22,15,41,.2);border-radius:20px;margin-top:24px}
.bk-empty h3{font-family:'Newsreader',serif;font-weight:400;font-size:26px;margin:0}
.bk-empty p{color:var(--body);margin:10px 0 0}

/* dark band */
.bk-dark{position:relative;z-index:2;background:var(--ink);color:#f2eee6}
.bk-dark .bk-h2{color:#fbf8f1;font-weight:300}
.bk-dark .sub{font-size:16.5px;line-height:1.6;color:rgba(242,238,230,.68);margin:12px 0 0;max-width:46ch}

/* FAQ and contents */
.bk-2col{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,64px);align-items:start}
.bk-faqlist{border-top:1px solid rgba(22,15,41,.16)}
.bk-faq{border-bottom:1px solid var(--line)}
.bk-faq summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:minmax(0,1fr) 30px;gap:16px;align-items:center;padding:clamp(18px,2.2vw,22px) 4px;min-height:64px}
.bk-faq summary::-webkit-details-marker{display:none}
.bk-faq h3{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(18px,2vw,21px);line-height:1.3;margin:0}
.bk-faq .plusic{width:30px;height:30px;border-radius:999px;border:1px solid rgba(22,15,41,.18);display:flex;align-items:center;justify-content:center;color:var(--gold-t);font-size:16px;transition:transform .3s,background .3s}
.bk-faq[open] .plusic{transform:rotate(45deg);background:rgba(207,149,38,.14)}
.bk-faq .a{font-size:16px;line-height:1.65;color:var(--body);margin:0 0 20px;padding:0 4px;max-width:60ch}
.bk-faq .tocrow{display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px;align-items:baseline}
.bk-faq .tocnum{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--gold-t)}
.bk-faq .tocttl{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}
.bk-faq .freetag{font-family:'JetBrains Mono',monospace;font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;padding:4px 8px;border-radius:999px;background:rgba(207,149,38,.16);color:#8a5f0e}
.bk-faq .tocdesc{font-size:15.5px;line-height:1.6;color:var(--body);margin:0 0 18px 44px;max-width:56ch}
.bk-side p{font-size:16px;line-height:1.6;color:var(--body);margin:14px 0 0;max-width:38ch}
.bk-side p a{display:inline-block;padding:8px 0;text-decoration:underline;text-underline-offset:5px}

/* book page hero */
.bk-bhero{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(28px,5vw,80px);align-items:start;padding-top:clamp(12px,2.4vw,28px);padding-bottom:clamp(48px,7vw,96px)}
.bk-stage{position:sticky;top:96px;perspective:1600px}
.bk-stage .glow{position:absolute;inset:6% 0;border-radius:999px;background:radial-gradient(circle,rgba(122,86,224,.32),transparent 66%);filter:blur(44px)}
.bk-3d{position:relative;width:min(100%,380px);margin:0 auto;transform-style:preserve-3d;animation:bk-float3d 9s ease-in-out infinite}
.bk-bigcover{aspect-ratio:2/3;border-radius:6px 16px 16px 6px;padding:12% 10%;display:flex;flex-direction:column;position:relative;overflow:hidden;box-shadow:30px 40px 70px rgba(22,15,41,.35),inset 8px 0 0 rgba(0,0,0,.25),inset 9px 0 0 rgba(255,255,255,.08)}
.bk-bigcover .shine{position:absolute;inset:0;background:radial-gradient(circle at 70% 18%,rgba(224,168,50,.22),transparent 45%)}
.bk-bigcover .row{position:relative;display:flex;justify-content:space-between;font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.18em;text-transform:uppercase;opacity:.8}
.bk-bigcover .disc{position:relative;width:46%;aspect-ratio:1;margin:16% auto 0;border-radius:999px;box-shadow:0 0 0 10px rgba(242,230,201,.06),0 0 0 11px rgba(242,230,201,.22),0 0 60px rgba(224,168,50,.35)}
.bk-bigcover .tt{position:relative;margin-top:auto;text-align:center}
.bk-bigcover .tt .t{font-family:'Newsreader',serif;font-size:clamp(28px,3.4vw,40px);line-height:1.02;letter-spacing:-.02em}
.bk-bigcover .tt .s{font-size:12.5px;line-height:1.4;opacity:.75;margin-top:12px}
.bk-under{position:relative;display:flex;justify-content:center;align-items:center;gap:10px;margin-top:26px;flex-wrap:wrap}
.bk-under a{display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:12px 18px;border-radius:999px;background:#fff;border:1px solid rgba(22,15,41,.14);color:var(--ink)!important;font-weight:600;font-size:15px}
.bk-under a:hover{border-color:var(--ink)}
.bk-under span{font-size:13.5px;color:var(--label)}
.bk-tags{display:flex;flex-wrap:wrap;gap:8px}
.bk-tags span{font-family:'JetBrains Mono',monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;padding:7px 12px;border-radius:999px;border:1px solid rgba(22,15,41,.16);color:var(--body)}
.bk-tags span.dark{background:var(--ink);color:var(--cream);border-color:var(--ink)}
.bk-bh1{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(44px,6.6vw,84px);line-height:.96;letter-spacing:-.032em;margin:18px 0 0;text-wrap:balance}
.bk-sub{font-family:'Newsreader',serif;font-style:italic;font-weight:300;font-size:clamp(19px,2.2vw,25px);line-height:1.38;color:var(--violet);margin:14px 0 0;max-width:34ch;text-wrap:pretty}
.bk-by{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:18px;font-size:14px;color:var(--label)}
.bk-by b{color:var(--ink);font-weight:600}
.bk-edition{font-size:13.5px;line-height:1.5;color:var(--label);margin:10px 0 0;max-width:56ch}
.bk-buy{margin-top:clamp(24px,3vw,34px);background:rgba(255,255,255,.7);border:1px solid rgba(22,15,41,.1);border-radius:24px;padding:clamp(18px,2.4vw,26px);box-shadow:0 24px 60px rgba(22,15,41,.08)}
.bk-buy .pr{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px 14px}
.bk-buy .pr b{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(40px,4.6vw,52px);line-height:1}
.bk-buy .pr .once{font-size:14px;color:var(--label);flex-basis:100%}
.bk-buy form{margin:16px 0 0}
.bk-buy label.em{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px}
.bk-buy input[type=email]{width:100%;min-height:52px;border:1px solid rgba(22,15,41,.18);border-radius:12px;background:#fff;padding:0 16px;font-size:16px;color:var(--ink)}
.bk-buy input[type=email]:focus{outline:2px solid var(--violet);outline-offset:1px}
.bk-cta{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;margin-top:12px;background:var(--ink);color:var(--cream)!important;font-weight:600;font-size:17px;padding:18px;border-radius:12px;min-height:58px;border:0;cursor:pointer;box-shadow:0 14px 34px rgba(22,15,41,.2);transition:background .25s,transform .25s}
.bk-cta:hover{background:var(--violet);transform:translateY(-2px)}
.bk-cta[disabled]{opacity:.6;cursor:wait;transform:none}
.bk-buy .ticks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 16px;margin-top:16px;font-size:14px;color:#2e2740}
.bk-buy .note{font-size:13px;color:var(--label);margin:14px 0 0}
.bk-buy .err{font-size:14px;color:#b42318;margin:10px 0 0}
.bk-outcomes{margin-top:clamp(28px,3.6vw,40px)}
.bk-outcomes .k{font-family:'JetBrains Mono',monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label)}
.bk-outcomes ul{list-style:none;margin:12px 0 0;padding:0;border-top:1px solid var(--line)}
.bk-outcomes li{display:grid;grid-template-columns:22px minmax(0,1fr);gap:12px;padding:13px 0;border-bottom:1px solid rgba(22,15,41,.1);font-size:16px;line-height:1.5}
.bk-outcomes li span:first-child{color:var(--gold)}

/* intro (Archemap edition note) */
.bk-intro{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(24px,4vw,64px);align-items:start}
.bk-intro .txt p{font-family:'Newsreader',serif;font-size:clamp(18px,1.9vw,21px);line-height:1.65;margin:0 0 18px;text-wrap:pretty}
.bk-intro .txt p:first-child::first-letter{font-size:3.1em;float:left;line-height:.9;margin:6px 10px 0 0;color:var(--gold-t)}

/* discover, for you */
.bk-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:rgba(22,15,41,.11);border-radius:20px;overflow:hidden;list-style:none;margin:clamp(24px,3vw,36px) 0 0;padding:0}
.bk-4 li{background:var(--cream);padding:clamp(22px,2.6vw,32px)}
.bk-4 .top{display:flex;justify-content:space-between;align-items:center}
.bk-4 .n{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--gold-t)}
.bk-4 .g{font-size:22px;color:var(--violet)}
.bk-4 h3{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(21px,2.2vw,25px);line-height:1.15;margin:28px 0 0}
.bk-4 p{font-size:15px;line-height:1.6;color:var(--body);margin:10px 0 0}
.bk-fit{background:#fff;border:1px solid rgba(22,15,41,.1);border-radius:22px;padding:clamp(22px,3vw,34px)}
.bk-fit.not{background:transparent;border:1px dashed rgba(22,15,41,.2)}
.bk-fit h2{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(24px,3vw,32px);line-height:1.1;margin:0}
.bk-fit ul{list-style:none;margin:18px 0 0;padding:0}
.bk-fit li{display:grid;grid-template-columns:26px minmax(0,1fr);gap:10px;padding:11px 0;border-top:1px solid rgba(22,15,41,.08);font-size:16px;line-height:1.5}
.bk-fit.not li{color:var(--body)}
.bk-fit .m{width:22px;height:22px;border-radius:999px;background:rgba(207,149,38,.16);color:var(--gold-t);display:flex;align-items:center;justify-content:center;font-size:12px}
.bk-fit.not .m{background:transparent;border:1px solid rgba(22,15,41,.2);color:var(--body)}
.bk-fit .after{font-size:14.5px;line-height:1.6;color:var(--label);margin:16px 0 0}
.bk-fit .after a{display:inline-block;padding:8px 0;text-decoration:underline;text-underline-offset:5px}

/* preview reader */
.bk-prevhead{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin:clamp(18px,2.6vw,28px) 0 clamp(24px,3vw,36px)}
.bk-themes{display:flex;gap:4px;padding:4px;border-radius:12px;background:rgba(242,238,230,.08)}
.bk-themes button{min-height:40px;padding:0 14px;border:0;border-radius:9px;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;background:transparent;color:rgba(242,238,230,.75)}
.bk-themes button[aria-pressed="true"]{background:var(--gold-2);color:var(--ink)}
.bk-reader{--shell:#fbf8f1;--rink:#211d17;--rmuted:#6b6480;--rline:rgba(22,15,41,.12);display:grid;grid-template-columns:220px minmax(0,1fr);border-radius:24px;overflow:hidden;border:1px solid rgba(242,238,230,.12);box-shadow:0 30px 70px rgba(22,15,41,.1);background:var(--shell);color:var(--rink)}
.bk-reader[data-theme="sepia"]{--shell:#f1e4ca;--rink:#3a2c16;--rmuted:#7a6440;--rline:rgba(90,60,20,.18)}
.bk-reader[data-theme="dark"]{--shell:#1b1233;--rink:#ece6da;--rmuted:#a69fbd;--rline:rgba(242,238,230,.14)}
.bk-rside{padding:14px;border-right:1px solid var(--rline)}
.bk-rside .h{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--rmuted);padding:6px 14px 10px}
.bk-tab{display:flex;gap:10px;align-items:baseline;width:100%;text-align:left;min-height:48px;padding:12px 14px;border-radius:10px;border:0;background:transparent;cursor:pointer;font-size:14px;color:var(--rmuted);font-weight:500}
.bk-tab[aria-current="true"]{background:var(--rline);color:var(--rink);font-weight:600}
.bk-tab .p{font-family:'JetBrains Mono',monospace;font-size:10px;opacity:.7}
.bk-rpage{padding:clamp(24px,4.4vw,60px) clamp(20px,5vw,72px);min-height:440px;display:flex;flex-direction:column}
.bk-rpage[hidden]{display:none}
.bk-rpage .kk{font-family:'JetBrains Mono',monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--rmuted)}
.bk-rpage h3{font-family:'Newsreader',serif;font-weight:400;font-size:clamp(28px,3.4vw,40px);line-height:1.08;margin:14px 0 0;letter-spacing:-.02em}
.bk-rpage h4{font-family:'Newsreader',serif;font-weight:400;font-size:22px;margin:26px 0 10px}
.bk-rpage .prose{max-width:62ch;margin-top:22px}
.bk-rpage .prose p{font-family:'Newsreader',serif;font-size:clamp(17px,1.8vw,19px);line-height:1.7;margin:0 0 16px;text-wrap:pretty}
.bk-rpage .prose blockquote{margin:0 0 16px;padding-left:18px;border-left:2px solid var(--rline);font-family:'Newsreader',serif;font-style:italic;font-size:18px;line-height:1.65}
.bk-rnav{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:24px;border-top:1px solid var(--rline)}
.bk-rnav button{min-height:46px;padding:0 18px;border-radius:10px;border:1px solid var(--rline);background:transparent;color:var(--rink);font-size:14.5px;font-weight:600;cursor:pointer}
.bk-rnav button[disabled]{opacity:.35;cursor:default}
.bk-rnav span{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--rmuted)}
.bk-gold{display:inline-flex;align-items:center;justify-content:center;background:var(--gold-2);color:var(--ink)!important;font-weight:600;font-size:16px;padding:16px 26px;border-radius:10px;min-height:52px}
.bk-gold:hover{background:#fbeecb}

/* included */
.bk-incl{position:relative;z-index:2;background:var(--band);border-top:1px solid rgba(22,15,41,.08);border-bottom:1px solid rgba(22,15,41,.08)}
.bk-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(14px,2vw,22px)}
.bk-3 .c{background:#fff;border:1px solid rgba(22,15,41,.08);border-radius:18px;padding:clamp(18px,2.2vw,24px)}
.bk-3 h3{font-family:'Newsreader',serif;font-weight:400;font-size:21px;line-height:1.2;margin:0}
.bk-3 p{font-size:15px;line-height:1.55;color:var(--body);margin:8px 0 0}
.bk-steps{list-style:none;margin:clamp(30px,4vw,48px) 0 0;padding:0}
.bk-steps li{display:grid;grid-template-columns:40px minmax(0,1fr);gap:14px;align-items:start}
.bk-steps .n{width:40px;height:40px;border-radius:999px;background:var(--ink);color:var(--gold-2);display:flex;align-items:center;justify-content:center;font-family:'JetBrains Mono',monospace;font-size:13px}
.bk-steps .t{display:block;font-family:'Newsreader',serif;font-size:20px}
.bk-steps .d{display:block;font-size:15px;line-height:1.55;color:var(--body);margin-top:4px}

/* read next */
.bk-next .k{font-family:'JetBrains Mono',monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--label)}
.bk-next .list{margin-top:12px;border-top:1px solid rgba(22,15,41,.14)}
.bk-next a{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid rgba(22,15,41,.1);color:var(--ink)!important;min-height:64px}
.bk-next a:hover{color:var(--violet)!important}
.bk-next .sw{width:34px;aspect-ratio:2/3;border-radius:2px 5px 5px 2px;flex:none;box-shadow:0 6px 12px rgba(22,15,41,.18)}
.bk-next .tx{flex:1;min-width:0}
.bk-next .tx b{display:block;font-family:'Newsreader',serif;font-weight:400;font-size:19px}
.bk-next .tx small{display:block;font-size:13.5px;color:var(--label);margin-top:2px}

/* sticky buy bar on small screens */
.bk-sticky{display:none}

@media (max-width:1080px){.bk-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.bk-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:980px){
  .bk-hero,.bk-bhero,.bk-intro{grid-template-columns:1fr}
  .bk-stage{position:relative;top:0;max-width:300px;margin:0 auto;width:100%}
  .bk-sticky{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;align-items:center;gap:14px;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:rgba(251,248,241,.94);backdrop-filter:blur(14px);border-top:1px solid rgba(22,15,41,.1)}
  .bk-sticky .w{flex:1;min-width:0}
  .bk-sticky .t{font-family:'Newsreader',serif;font-size:17px;line-height:1.1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .bk-sticky .p{font-size:13px;color:var(--label)}
  .bk-sticky a{display:inline-flex;align-items:center;justify-content:center;background:var(--ink);color:var(--cream)!important;font-weight:600;font-size:15.5px;padding:0 20px;border-radius:10px;min-height:50px;white-space:nowrap}
  .bk.has-sticky{padding-bottom:84px}
}
@media (max-width:760px){
  .bk-2col,.bk-3{grid-template-columns:1fr}
  .bk-reader{grid-template-columns:1fr}
  .bk-rside{display:flex;overflow-x:auto;gap:6px;scrollbar-width:none;border-right:0;border-bottom:1px solid var(--rline)}
  .bk-rside::-webkit-scrollbar{display:none}
  .bk-rside .h{display:none}
  .bk-tab{flex:none;width:auto;white-space:nowrap}
  .bk-faq .tocdesc{margin-left:0}
}
@media (max-width:640px){
  .bk-grid{grid-template-columns:1fr}
  .bk-card{flex-direction:row;gap:16px;align-items:flex-start}
  .bk-card .shelf{width:112px;flex:none;margin:0;padding:14px 12px}
  .bk-fan{height:300px}
  .bk-fan>div.f{width:150px}
  .bk-buy .ticks{grid-template-columns:1fr}
}
@media (max-width:520px){.bk-4{grid-template-columns:1fr}}