@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:500;font-display:swap;src:url("fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:600;font-display:swap;src:url("fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:700;font-display:swap;src:url("fonts/ibm-plex-sans-latin-700-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;src:url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2")}
:root{
  --bg:#1b1e24;          /* page background, sampled from the covers */
  --bg-deep:#12151a;     /* code blocks, form panel */
  --panel:#232830;       /* cards */
  --line:#323843;
  --text:#fbfaf6;
  --muted:#b6bcc8;
  --accent:#a3e635;
  --on-accent:#14171c;
  --amber:#facc15;       /* placeholder chips, as on the covers */
  --orange:#f59e42;      /* tag colour, as on the covers */
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:17px;line-height:1.6;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1.2px);background-size:26px 26px}
a{color:var(--accent)}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:22px 0}
.brand{font-family:var(--mono);font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}
.brand b{color:var(--accent);font-weight:500}
.lang{font-family:var(--mono);font-size:12px;letter-spacing:.15em;border:1px solid var(--line);border-radius:8px;padding:4px 10px;color:var(--muted)}

/* hero */
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;padding:28px 0 72px}
.eyebrow{font-family:var(--mono);font-size:13px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0 0 14px}
h1{font-size:clamp(34px,5.2vw,56px);line-height:1.04;letter-spacing:-.02em;margin:0 0 18px;font-weight:700}
h1 em{font-style:normal;color:var(--accent)}
.sub{font-size:19px;color:var(--muted);margin:0 0 24px;max-width:34em}
.bullets{list-style:none;margin:0 0 28px;padding:0;display:grid;gap:12px}
.bullets li{display:flex;gap:12px;align-items:flex-start}
.bullets li::before{content:"";flex:0 0 22px;height:22px;margin-top:3px;border-radius:50%;
  background:var(--accent) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M6 12.5l4 4 8-9' fill='none' stroke='%2314171c' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/></svg>") center/14px no-repeat}

/* form (replace with Kit form embed) */
.form{background:var(--bg-deep);border:1px solid var(--line);border-radius:16px;padding:22px;max-width:480px}
.form label{display:block;font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.form input[type=email]{width:100%;font:inherit;font-size:17px;color:var(--text);background:var(--bg);border:1.5px solid var(--line);border-radius:10px;padding:14px 14px}
.form input[type=email]::placeholder{color:#848c9b}
.form input[type=email]:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 30%,transparent)}
.btn{display:block;width:100%;margin-top:12px;font:inherit;font-weight:700;font-size:17px;color:var(--on-accent);background:var(--accent);
  border:0;border-radius:10px;padding:15px 18px;cursor:pointer;transition:transform .08s,filter .15s}
.btn:hover{filter:brightness(1.07)}.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:3px solid var(--text);outline-offset:2px}
.fine{font-size:13.5px;color:var(--muted);margin:12px 0 0;line-height:1.5}
.consent{font-size:13px;color:var(--muted);margin:10px 0 0;line-height:1.5}
.cover{position:relative;justify-self:center;width:min(100%,340px)}
.cover img{display:block;width:100%;height:auto;border-radius:10px;
  box-shadow:0 30px 60px -20px rgba(0,0,0,.7),0 0 0 1px rgba(255,255,255,.08);transform:rotate(2deg)}
.cover::after{content:"";position:absolute;inset:auto -10% -6% 10%;height:30%;background:radial-gradient(closest-side,color-mix(in srgb,var(--accent) 35%,transparent),transparent);z-index:-1;filter:blur(20px)}
/* square bundle board: wider cap than the portrait book cover, and it carries readable labels */
.cover.board{width:min(100%,400px)}

/* sections */
section{padding:56px 0;border-top:1px solid var(--line)}
h2{font-size:clamp(26px,3.4vw,34px);line-height:1.15;letter-spacing:-.015em;margin:0 0 10px}
.lead{color:var(--muted);margin:0 0 30px;max-width:40em}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px}
.card .n{font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.12em;margin-bottom:10px;display:block}
.card h3{font-size:18px;margin:0 0 8px;line-height:1.3}
.card p{margin:0;color:var(--muted);font-size:16px}
.code{background:var(--bg-deep);border:1px solid var(--line);border-radius:14px;padding:20px 22px;font-family:var(--mono);font-size:14.5px;line-height:1.9;overflow-x:auto}
.code .tag{color:var(--orange)}
.chip{background:var(--amber);color:#1b1e24;border-radius:5px;padding:1px 7px;font-weight:500}
.two{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.two p{color:var(--muted);margin:0 0 14px}
.rules{display:grid;gap:12px;margin:0;padding:0;list-style:none}
.rules li{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:10px;padding:14px 16px}
.rules b{display:block;margin-bottom:2px}
.rules span{color:var(--muted);font-size:16px}
details{border:1px solid var(--line);border-radius:12px;background:var(--panel);margin-bottom:10px}
summary{cursor:pointer;padding:16px 18px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:var(--mono);color:var(--accent)}
details[open] summary::after{content:"–"}
details p{margin:0;padding:0 18px 16px;color:var(--muted)}
.bottom{text-align:center;padding:64px 0}
.bottom .form{margin:24px auto 0;text-align:left}
footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:14px}
footer .row{display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between}
footer a{color:var(--muted)}

@media (max-width:860px){
  .hero{grid-template-columns:1fr;gap:34px;padding-bottom:48px}
  .cover{order:-1;width:min(52%,190px)}
  .cover.board{width:min(82%,320px)}
  .grid3,.two{grid-template-columns:1fr}
  body{font-size:16.5px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-error{margin:10px 0 0;padding:10px 12px;border-radius:8px;background:#3a1d1d;border:1px solid #7f2d2d;color:#fecaca;font-size:15px}
.form-error[hidden]{display:none}
.hr{display:flex;gap:22px;align-items:center}
a.lang{text-decoration:none;color:var(--muted)}
a.lang:hover,a.lang:focus-visible{color:var(--text);border-color:var(--accent)}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--on-accent);padding:10px 14px;border-radius:0 0 8px 0;z-index:10;font-weight:600}
.skip:focus{left:0}
a.brand{text-decoration:none}
nav.top{display:flex;gap:22px;align-items:center}
nav.top a{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);text-decoration:none}
nav.top a:hover,nav.top a:focus-visible{color:var(--text)}
section.first{border-top:0;padding-top:20px}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
a.btn,.btn.inline{display:inline-block;width:auto;margin:0;padding:14px 22px;text-decoration:none;text-align:center}
.btn.ghost{background:transparent;color:var(--text);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--accent);filter:none}
.res-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
a.res{display:grid;grid-template-columns:128px 1fr;gap:18px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;text-decoration:none;color:inherit}
a.res:hover{border-color:var(--accent)}
a.res img{width:128px;height:128px;border-radius:10px;display:block;object-fit:cover}
a.res b{display:block;font-size:19px;margin-bottom:4px}
a.res span span{display:block;color:var(--muted);font-size:15.5px;line-height:1.5}
a.res i{display:inline-block;margin-top:8px;font-style:normal;color:var(--accent);font-weight:600;font-size:15px}
.group{font-family:var(--mono);font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin:30px 0 12px}
.books{display:grid;gap:10px}
a.book{position:relative;overflow:hidden;display:grid;grid-template-columns:70px 1fr auto;gap:14px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:15px 18px 15px 24px;text-decoration:none;color:inherit}
a.book::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--bar,var(--c))}
a.book:hover{border-color:var(--c,var(--accent))}
a.book .num{font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;color:var(--c,var(--accent))}
a.book .info b{display:block;font-size:17px;line-height:1.35}
a.book .info span{display:block;color:var(--muted);font-size:15px;margin-top:2px}
a.book .price{font-weight:700;font-size:18px;white-space:nowrap}
.note{color:var(--muted);font-size:15.5px;margin:16px 0 0;max-width:46em}
.prose{max-width:46em}
.prose h1{font-size:clamp(32px,4.6vw,44px)}
.prose h2{font-size:22px;margin:34px 0 8px;letter-spacing:-.01em}
.prose p,.prose li{color:#d3d7df}
.prose ul{padding-left:1.2em;margin:8px 0 14px}
.prose li{margin:6px 0}
.prose .meta{font-family:var(--mono);font-size:13px;color:var(--muted)}
.thanks{max-width:40em;margin:0 auto;text-align:center;padding:40px 0 70px}
.thanks .panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;text-align:left;margin:26px 0}
.thanks .panel ol{margin:8px 0 0;padding-left:1.3em;color:#d3d7df}
.thanks .panel li{margin:8px 0}
.thanks .tick{width:60px;height:60px;border-radius:50%;margin:0 auto 18px;background:var(--accent) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M6 12.5l4 4 8-9' fill='none' stroke='%2314171c' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/></svg>") center/32px no-repeat}
@media (max-width:860px){
  .res-grid{grid-template-columns:1fr}
  a.book{grid-template-columns:1fr auto;row-gap:2px}
  a.book .num{grid-column:1 / -1}
  nav.top{gap:14px}
  a.res{grid-template-columns:96px 1fr}
  a.res img{width:96px;height:96px}
}

/* Source for the cover and thumbnail JPGs in /assets. Not referenced by any page:
   render these at size and export. Reads --accent, so a cover follows the page accent. */
.pcwrap{container-type:inline-size;width:100%}
.packcard{position:relative;aspect-ratio:1/1.6;max-width:360px;margin:0 auto;background:#14171c;border:1px solid var(--line);border-radius:14px;padding:7cqw 8cqw;display:flex;flex-direction:column;transform:rotate(-2.2deg);box-shadow:0 30px 70px rgba(0,0,0,.45)}
.packcard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2.4cqw;background:var(--accent);border-radius:14px 0 0 14px}
.packcard .pc-top{font-family:var(--mono);font-size:3.1cqw;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.packcard .pc-free{font-weight:700;font-size:9cqw;margin-top:12cqw;line-height:1}
.packcard .pc-title{font-weight:700;font-size:9.4cqw;line-height:1.02;margin-top:2cqw;letter-spacing:-.02em;color:var(--text)}
.packcard .pc-title em{font-style:normal;color:var(--accent);display:block}
.packcard .pc-sub{margin-top:auto;font-size:4.6cqw;line-height:1.4;color:#d3d7df;max-width:80%}
.packcard .pc-badge{position:absolute;right:8cqw;top:58%;width:24cqw;height:24cqw;border-radius:50%;background:var(--accent);color:#14171c;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;font-size:3cqw;line-height:1.15;font-weight:600}
.packcard .pc-badge b{font-size:10cqw;line-height:1}
.mini{display:flex;flex-direction:column;justify-content:center;width:128px;height:128px;border-radius:10px;background:#14171c;border:1px solid var(--line);padding:12px 12px 12px 18px;position:relative;overflow:hidden}
.mini::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--a)}
.mini i{font-style:normal;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.mini b{font-size:19px;line-height:1.1;margin-top:4px;color:var(--text)}
@media (max-width:860px){.mini{width:96px;height:96px}.mini b{font-size:15px}}

/* browser surfaces: selection, caret, scrollbar, anchor landing */
::selection{background:var(--accent);color:var(--on-accent)}
html{scrollbar-color:var(--line) var(--bg)}
::-webkit-scrollbar{width:12px;height:12px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--line);border:3px solid var(--bg);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:color-mix(in srgb,var(--line) 70%,var(--text))}
.form input[type=email]{caret-color:var(--accent)}
a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
a.book:focus-visible,a.res:focus-visible{outline-offset:-1px;border-radius:12px}
section[id]{scroll-margin-top:18px}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}

/* ungated sample */
.sample{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
.lbl{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}

/* offer block: the bundle, elevated */
.offer{position:relative;overflow:hidden;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px 24px 22px 30px;display:grid;gap:16px}
.offer::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;
  background:linear-gradient(to bottom,#f06b33,#38bdf8,#f472b6,#fbbf24,#a78bfa,#4ade80)}
.offer .head{display:flex;flex-wrap:wrap;gap:6px 18px;align-items:baseline;justify-content:space-between}
.offer h3{font-size:22px;line-height:1.25;margin:0;max-width:20em}
.offer .amount{font-weight:700;font-size:30px;white-space:nowrap}
.offer p{margin:0;color:var(--muted);max-width:38em}
.offer .btn{justify-self:start}
.facts{display:flex;flex-wrap:wrap;gap:6px 22px;margin:0;padding:0;list-style:none;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.facts b{color:var(--text);font-weight:500}
.offer details{background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;margin:0}
.offer summary{padding:14px 0 12px;font-size:16px}
.offer details ul{margin:0;padding:0 0 14px;list-style:none;color:var(--muted);font-size:15.5px}
.offer details li{margin:7px 0}
.offer details li b{color:var(--text);font-weight:600}
.offer details li span{display:block;color:var(--muted);font-size:15.5px;margin-top:1px}
.btn-sub{font-size:15px;color:var(--muted);margin:14px 0 0}

/* next step on confirmation pages */
.thanks .nextup{position:relative;overflow:hidden;background:var(--panel);border:1px solid var(--line);
  border-radius:16px;padding:24px;margin:26px 0 0;text-align:center}
.thanks .nextup::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--accent)}
.thanks .nextup .group{margin:0 0 8px}
.thanks .nextup p{margin:0 0 16px;color:var(--muted)}
.thanks .nextup .btn-sub{margin:14px 0 0}

@media (max-width:860px){
  .sample{grid-template-columns:1fr}
  .offer{padding:20px 18px 18px 24px}
  .offer .amount{font-size:26px}
}