:root{
  --ink:#0b0a08;
  --panel:#131109;
  --line:#2a2415;
  --gold:#c9a24b;
  --gold-pale:#e6d5a7;
  --bone:#ece7da;
  --muted:#a29a89;
  --blue:#2b4a8f;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
body{
  background:var(--ink);
  color:var(--bone);
  font-family:"IBM Plex Sans",sans-serif;
  font-weight:300;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--gold-pale);text-decoration:none}
a:hover{color:var(--gold)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--gold);outline-offset:3px;
}
.wrap{max-width:1060px;margin:0 auto;padding:0 24px}

/* ---------- signature motif: the sign-here line ---------- */
.signline{display:flex;align-items:center;gap:14px;color:var(--gold);font-family:"IBM Plex Mono",monospace;font-size:.8rem;letter-spacing:.08em}
.signline::after{content:"";flex:1;border-bottom:1px dashed var(--line)}
.signline .x{font-family:"EB Garamond",serif;font-style:italic;font-size:1.3rem;line-height:1}

/* ---------- nav ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(11,10,8,.88);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-family:"IBM Plex Mono",monospace;font-size:.85rem;letter-spacing:.14em;color:var(--bone);text-transform:uppercase}
.brand span{color:var(--gold)}
nav ul{display:flex;gap:28px;list-style:none}
nav ul a{font-family:"IBM Plex Mono",monospace;font-size:.75rem;letter-spacing:.1em;color:var(--muted);text-transform:lowercase}
nav ul a::before{content:"/";color:var(--gold);margin-right:2px}
nav ul a:hover{color:var(--bone)}
@media(max-width:560px){nav ul{gap:16px}}

/* ---------- hero ---------- */
.hero{padding:120px 0 90px;border-bottom:1px solid var(--line)}
.hero .kicker{font-family:"IBM Plex Mono",monospace;font-size:.75rem;letter-spacing:.22em;color:var(--gold);text-transform:uppercase;margin-bottom:26px}
h1{font-family:"EB Garamond",serif;font-weight:500;font-size:clamp(2.6rem,6vw,4.4rem);line-height:1.08;letter-spacing:.01em}
h1 em{font-style:italic;color:var(--gold-pale)}
.hero p{max-width:34ch;margin-top:28px;font-size:1.12rem;color:var(--muted)}
.hero .signline{margin-top:64px;max-width:520px}

/* ---------- sections ---------- */
section{padding:96px 0;border-bottom:1px solid var(--line)}
.sec-label{font-family:"IBM Plex Mono",monospace;font-size:.75rem;letter-spacing:.18em;color:var(--gold);text-transform:lowercase;margin-bottom:18px}
.sec-label::before{content:"/"}
h2{font-family:"EB Garamond",serif;font-weight:500;font-size:clamp(1.9rem,3.6vw,2.7rem);line-height:1.15;max-width:22ch}
.lede{margin-top:20px;max-width:58ch;color:var(--muted)}

/* ---------- books ---------- */
.book{display:grid;grid-template-columns:260px 1fr;gap:56px;align-items:start;padding:64px 0;border-bottom:1px dashed var(--line)}
.book:last-of-type{border-bottom:none;padding-bottom:0}
@media(max-width:720px){.book{grid-template-columns:1fr;gap:32px}.cover{margin:0 auto}}

/* CSS-drawn covers, each after its real jacket */
.cover{width:240px;aspect-ratio:2/3;border:1px solid var(--line);display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:26px 20px;position:relative;box-shadow:0 24px 48px rgba(0,0,0,.5)}
.cover-fineprint{background:#14131a;border-color:#14131a;outline:1px solid #a8873f;outline-offset:-10px;justify-content:flex-start;padding-top:24px}
.cover-fineprint .t1{font-family:"EB Garamond",serif;color:#ece7da;font-size:1.05rem;line-height:1.3}
.cover-fineprint .t1 em{font-style:italic}
.cover-fineprint .t1 .g{color:#c99f3c;font-style:italic;font-size:1.1rem}
.cover-fineprint .t2{font-family:"EB Garamond",serif;color:#c99f3c;font-size:3.1rem;font-weight:600;letter-spacing:.02em;line-height:1;margin:8px 0 8px}
.cover-fineprint .t3{font-family:"EB Garamond",serif;font-style:italic;color:#ece7da;font-size:.85rem;line-height:1.35;max-width:18ch}
.cover-fineprint .by{font-family:"IBM Plex Sans",sans-serif;color:#cfc9ba;font-size:.5rem;letter-spacing:.2em;text-transform:uppercase;margin-top:8px}
.cover-fineprint .hex{width:44px;height:50px;margin-top:14px;display:flex;align-items:center;justify-content:center;color:#c99f3c;font-family:"EB Garamond",serif;font-size:1.1rem;background:transparent;clip-path:none;border:2px solid #c99f3c;clip-path:polygon(50% 0%,100% 25%,100% 75%,50% 100%,0% 75%,0% 25%)}
.cover-fineprint .sig{position:absolute;bottom:20px;left:24px;right:24px;font-family:"EB Garamond",serif;font-style:italic;color:#cfc9ba;font-size:.55rem;border-top:1px dashed #8f887a;padding-top:5px}
.cover-fineprint .sig::before{content:"X";font-family:"EB Garamond",serif;font-style:italic;color:#ece7da;float:left;margin-top:-17px;font-size:.9rem}
.cover-root{background:#0a0a0c;border-color:#2b2b31}
.cover-root .t1{font-family:"IBM Plex Mono",monospace;color:#e8e8ea;font-size:1.05rem;letter-spacing:.18em;border-top:1px solid #e8e8ea;padding-top:10px}
.cover-root .t1::before{content:"✓ ";color:#e8e8ea}
.cover-root .t3{font-family:"IBM Plex Mono",monospace;color:#8a8a92;font-size:.6rem;margin-top:10px;max-width:20ch}
.cover-root .roots{margin-top:34px;color:#d8d8dc;font-size:2rem;line-height:1;letter-spacing:-2px}
.cover-factory{background:var(--blue);border-color:#3d5ca5}
.cover-factory .t0{color:#cdd9f2;font-size:1.6rem;margin-bottom:14px}
.cover-factory .t1{font-family:"IBM Plex Sans",sans-serif;font-weight:500;color:#fff;font-size:1.6rem;letter-spacing:.06em;line-height:1.15;text-transform:uppercase}
.cover-factory .t3{font-family:"IBM Plex Mono",monospace;color:#cdd9f2;font-size:.55rem;margin-top:12px;max-width:22ch}

.book .meta{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--muted);letter-spacing:.12em;display:flex;gap:18px;margin-bottom:14px;text-transform:uppercase}
.book .meta .new{color:var(--ink);background:var(--gold);padding:1px 8px}
h3{font-family:"EB Garamond",serif;font-weight:500;font-size:2rem;line-height:1.1}
.book .sub{font-family:"EB Garamond",serif;font-style:italic;color:var(--gold-pale);margin-top:6px;font-size:1.1rem}
.book p.desc{margin-top:18px;max-width:52ch;color:var(--muted)}
.btn{display:inline-block;margin-top:26px;font-family:"IBM Plex Mono",monospace;font-size:.78rem;letter-spacing:.1em;color:var(--gold);border:1px solid var(--gold);padding:12px 22px;transition:background .18s,color .18s}
.btn:hover{background:var(--gold);color:var(--ink)}

/* ---------- about / press ---------- */
.about p,.press p{margin-top:20px;max-width:60ch;color:var(--muted)}
.about p strong,.press p strong{color:var(--bone);font-weight:400}
.press ul{margin-top:22px;list-style:none;max-width:60ch}
.press li{font-family:"IBM Plex Mono",monospace;font-size:.82rem;color:var(--bone);padding:12px 0;border-bottom:1px dashed var(--line)}
.press li::before{content:"§ ";color:var(--gold)}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:64px;margin-top:8px}
@media(max-width:760px){.contact-grid{grid-template-columns:1fr;gap:40px}}
form{display:grid;gap:22px}
label{display:block;font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.12em;color:var(--muted);text-transform:uppercase;margin-bottom:8px}
input,select,textarea{
  width:100%;background:var(--panel);border:1px solid var(--line);color:var(--bone);
  font-family:"IBM Plex Sans",sans-serif;font-size:.95rem;padding:13px 14px;border-radius:0;
}
input:hover,select:hover,textarea:hover{border-color:var(--muted)}
textarea{min-height:150px;resize:vertical}
select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--gold) 50%),linear-gradient(135deg,var(--gold) 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 14px) 50%;background-size:6px 6px;background-repeat:no-repeat}
.submit-row{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
button[type=submit]{cursor:pointer;background:var(--gold);border:1px solid var(--gold);color:var(--ink);font-family:"IBM Plex Mono",monospace;font-size:.8rem;letter-spacing:.1em;padding:14px 30px;transition:background .18s}
button[type=submit]:hover{background:var(--gold-pale)}
.form-note{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--muted)}
.sent-note{display:none;margin-top:26px;border:1px solid var(--gold);padding:16px 18px;font-family:"IBM Plex Mono",monospace;font-size:.8rem;color:var(--gold-pale)}
.sent-note.show{display:block}
/* honeypot: hidden from humans, visible to bots */
.hp{position:absolute;left:-6000px;top:auto;height:1px;width:1px;overflow:hidden}

/* ---------- footer ---------- */
footer{padding:48px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
footer .brand{font-size:.75rem}
footer small{font-family:"IBM Plex Mono",monospace;font-size:.68rem;color:var(--muted);letter-spacing:.08em}

/* ---------- faq (fine-print clauses) ---------- */
.faq{margin-top:48px;max-width:64ch}
.faq details{border-bottom:1px dashed var(--line);padding:4px 0}
.faq summary{cursor:pointer;list-style:none;display:flex;gap:14px;align-items:baseline;padding:16px 0;font-family:"EB Garamond",serif;font-size:1.25rem;color:var(--bone)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"§";color:var(--gold);font-family:"IBM Plex Mono",monospace;font-size:.85rem}
.faq summary:hover{color:var(--gold-pale)}
.faq details p{color:var(--muted);padding:0 0 20px 30px;max-width:56ch}
.faq details p a{border-bottom:1px dotted var(--gold)}

/* ---------- blog ---------- */
.post-list{margin-top:24px}
.post-card{display:block;padding:40px 0;border-bottom:1px dashed var(--line)}
.post-card .meta{font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.14em;color:var(--gold);text-transform:uppercase;display:flex;gap:18px;margin-bottom:12px}
.post-card h3{font-family:"EB Garamond",serif;font-weight:500;font-size:1.75rem;line-height:1.2;color:var(--bone)}
.post-card:hover h3{color:var(--gold-pale)}
.post-card p{margin-top:12px;max-width:62ch;color:var(--muted)}
.post-card .more{display:inline-block;margin-top:16px;font-family:"IBM Plex Mono",monospace;font-size:.75rem;letter-spacing:.1em;color:var(--gold)}

article.post{max-width:680px;margin:0 auto;padding:96px 24px}
article.post .meta{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.16em;color:var(--gold);text-transform:uppercase;display:flex;gap:18px;flex-wrap:wrap;margin-bottom:20px}
article.post h1{font-size:clamp(2rem,5vw,3rem);line-height:1.12}
article.post .standfirst{font-family:"EB Garamond",serif;font-style:italic;font-size:1.25rem;color:var(--gold-pale);margin-top:22px;line-height:1.5}
article.post h2{font-size:1.6rem;margin-top:56px;max-width:none}
article.post p{margin-top:20px;color:#c9c3b4}
article.post p a{border-bottom:1px dotted var(--gold)}
article.post ul,article.post ol{margin:20px 0 0 22px;color:#c9c3b4}
article.post li{margin-top:10px}
article.post li::marker{color:var(--gold)}
article.post blockquote{margin-top:28px;border-left:2px solid var(--gold);padding:6px 0 6px 22px;font-family:"EB Garamond",serif;font-style:italic;font-size:1.2rem;color:var(--gold-pale)}
.post-cta{margin-top:64px;border:1px solid var(--line);background:var(--panel);padding:32px}
.post-cta .signline{margin-bottom:16px}
.post-cta p{margin-top:8px;color:var(--muted)}
.post-nav{max-width:680px;margin:0 auto;padding:0 24px 96px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-family:"IBM Plex Mono",monospace;font-size:.75rem;letter-spacing:.08em}

/* ---------- conversion elements ---------- */
.btn-solid{background:var(--gold);color:var(--ink);font-weight:500}
.btn-solid:hover{background:var(--gold-pale);color:var(--ink)}
.stars{margin-top:10px;color:var(--gold);font-size:.95rem;letter-spacing:.12em}
.stars span{font-family:"IBM Plex Mono",monospace;font-size:.7rem;color:var(--muted);letter-spacing:.08em;margin-left:6px}
.ku-note{margin-top:12px;font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.08em;color:var(--gold-pale)}
.ku-note::before{content:"$0 · ";color:var(--gold)}

/* ---------- When to Trust AI cover ---------- */
.cover-ai{background:#f5efdf;border-color:#1d2d50;color:#1d2d50}
.cover-ai .t1{font-family:"IBM Plex Sans",sans-serif;font-weight:500;font-size:1.5rem;letter-spacing:.14em;text-transform:uppercase;line-height:1.25}
.cover-ai .t1 strong{font-weight:700;font-size:1.9rem;letter-spacing:.1em}
.cover-ai .bubble{position:relative;background:#1d2d50;color:#f5efdf;font-family:"IBM Plex Sans",sans-serif;font-weight:700;font-size:2.6rem;padding:18px 34px;border-radius:14px;margin:20px 0 16px}
.cover-ai .bubble::after{content:"";position:absolute;bottom:-10px;left:26px;border:10px solid transparent;border-top-color:#1d2d50;border-bottom:0}
.cover-ai .bubble .ok,.cover-ai .bubble .no{position:absolute;width:26px;height:26px;border-radius:50%;color:#fff;font-size:.85rem;font-weight:700;display:flex;align-items:center;justify-content:center;border:2px solid #f5efdf}
.cover-ai .bubble .ok{background:#2e9e4f;top:-12px;right:-12px}
.cover-ai .bubble .no{background:#d84b33;bottom:-12px;left:-12px}
.cover-ai .t2{font-family:"IBM Plex Sans",sans-serif;font-style:italic;font-weight:700;color:#e0593c;font-size:.95rem;text-transform:uppercase;letter-spacing:.04em}
.cover-ai .t3{font-family:"IBM Plex Sans",sans-serif;font-size:.55rem;font-weight:500;letter-spacing:.06em;text-transform:uppercase;margin-top:10px;max-width:24ch}
.cover-ai .byline{position:absolute;bottom:0;left:0;right:0;background:#1d2d50;color:#e8b64c;font-family:"IBM Plex Sans",sans-serif;font-weight:600;font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;padding:8px 0}
.btn-soon{display:inline-block;margin-top:26px;font-family:"IBM Plex Mono",monospace;font-size:.78rem;letter-spacing:.1em;color:var(--muted);border:1px dashed var(--line);padding:12px 22px;cursor:default}

/* ---------- Prove It to Yourself cover (yellow/black/red, after the real jacket) ---------- */
.cover-proof{background:#f0b310;border:6px solid #17150f;outline:1px solid #f0b310;outline-offset:-14px;padding:0;justify-content:flex-start}
.cover-proof .eyebrow{font-family:"IBM Plex Sans",sans-serif;font-weight:600;color:#17150f;font-size:.5rem;letter-spacing:.18em;text-transform:uppercase;margin-top:26px;padding:0 14px;border-bottom:2px solid #17150f;padding-bottom:5px}
.cover-proof .t1{font-family:"IBM Plex Sans",sans-serif;font-weight:700;color:#17150f;font-size:2.15rem;letter-spacing:.01em;line-height:1;margin-top:56px}
.cover-proof .t1 .loop{color:#c8281e;font-weight:700;display:inline-block;transform:translateY(2px)}
.cover-proof .t1b{font-family:"IBM Plex Sans",sans-serif;font-weight:700;color:#17150f;font-size:1.5rem;letter-spacing:.02em;line-height:1.15;margin-top:8px}
.cover-proof .t1b .red{color:#c8281e}
.cover-proof .band{position:absolute;left:0;right:0;bottom:0;background:#17150f;padding:20px 16px 18px;display:flex;flex-direction:column;gap:10px}
.cover-proof .band .sub{font-family:"IBM Plex Sans",sans-serif;font-weight:600;color:#ece7da;font-size:.62rem;letter-spacing:.06em;text-transform:uppercase;line-height:1.5}
.cover-proof .band .sub .y{color:#f0b310}
.cover-proof .band .byline{font-family:"IBM Plex Sans",sans-serif;font-weight:600;color:#ece7da;font-size:.55rem;letter-spacing:.18em;text-transform:uppercase;border-top:2px solid #f0b310;padding-top:8px;max-width:70%;margin:0 auto}

/* ---------- Your Brain on Algorithm cover ---------- */
.cover-algo{background:#17150f;border-color:#17150f;outline:1px solid #f0b310;outline-offset:-10px;justify-content:center}
.cover-algo .t1{font-family:"IBM Plex Sans",sans-serif;font-weight:700;color:#ece7da;font-size:1.7rem;line-height:1.1;text-transform:uppercase;letter-spacing:.03em}
.cover-algo .t2{font-family:"IBM Plex Sans",sans-serif;font-weight:700;color:#f0b310;font-size:1.9rem;line-height:1;text-transform:uppercase;letter-spacing:.02em;margin-top:6px}
.cover-algo .bar{width:70%;height:6px;background:#2c2820;margin-top:26px;position:relative}
.cover-algo .bar span{position:absolute;left:0;top:0;bottom:0;width:62%;background:#c8281e}
.cover-algo .byline{position:absolute;bottom:16px;left:0;right:0;font-family:"IBM Plex Sans",sans-serif;font-weight:600;color:#a29a89;font-size:.55rem;letter-spacing:.18em;text-transform:uppercase}