:root{
    --ink:#090909;
    --char:#111111;
    --char-2:#181818;
    --line:#2B2B2B;
    --ivory:#F5F1E8;
    --ivory-dim:#B8B2A6;
    --gold:#D9A441;
    --gold-hi:#F2C45B;
    --gold-soft:rgba(217,164,65,.10);
    --gold-line:rgba(217,164,65,.32);
    --r:12px;
    --maxw:1140px;
    --hdr:#F5F1E8;
  }
  *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  @media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

  body{
    background:var(--ink);
    color:var(--ivory);
    font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
    font-size:17px;line-height:1.65;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  /* subtle film-grain texture over the whole page */
  body::before{
    content:'';position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.05;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
  }
  a{color:inherit;text-decoration:none}
  img,svg{max-width:100%;display:block}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px;position:relative;z-index:2}

  h1,h2,h3,.cond{
    font-family:'Oswald','Arial Narrow',Impact,sans-serif;
    font-weight:700;letter-spacing:.005em;line-height:1.06;
    text-transform:uppercase;color:var(--hdr);
  }
  h1{font-size:clamp(2.55rem,10.5vw,5.4rem)}
  h2{font-size:clamp(1.95rem,6.5vw,3.15rem)}
  h3{font-size:clamp(1.2rem,4.4vw,1.5rem);line-height:1.14}
  .gold{color:var(--gold)}

  .eyebrow{
    display:inline-flex;align-items:center;gap:9px;
    font-family:'Inter',sans-serif;font-size:13px;font-weight:600;
    letter-spacing:.16em;text-transform:uppercase;color:var(--gold);
    border:1px solid var(--gold-line);background:var(--gold-soft);
    padding:8px 15px;border-radius:999px;margin-bottom:22px;
  }
  .lede{margin-top:18px;color:var(--ivory-dim);font-size:clamp(1.02rem,3.4vw,1.16rem);max-width:60ch}

  section{padding:72px 0;position:relative}
  @media(min-width:820px){section{padding:104px 0}}
  .rule{border-top:1px solid var(--line)}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:10px;
    font-family:'Inter',sans-serif;font-weight:650;font-size:16.5px;
    padding:17px 30px;border-radius:10px;border:1.5px solid transparent;
    transition:transform .13s ease,filter .13s ease,background .13s ease,border-color .13s ease;
    text-align:center;cursor:pointer;min-height:56px;
  }
  .btn:active{transform:translateY(1px)}
  .btn-gold{background:linear-gradient(175deg,var(--gold-hi),var(--gold));color:#12100B;
    box-shadow:0 10px 34px rgba(217,164,65,.22)}
  .btn-gold:hover{filter:brightness(1.07)}
  .btn-out{border-color:var(--line);color:var(--ivory);background:rgba(255,255,255,.02)}
  .btn-out:hover{border-color:var(--gold);color:var(--gold)}
  .btn-dark{background:var(--ink);color:var(--ivory);border-color:var(--ink)}
  .btn-dark:hover{filter:brightness(1.6)}
  .btn-full{width:100%}

  /* ---------- header ---------- */
  header{position:sticky;top:0;z-index:60;background:rgba(9,9,9,.92);
    backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px}
  .brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
  .brand-mark{width:34px;height:auto;flex-shrink:0}
  .brand-name{font-family:'Oswald',sans-serif;font-weight:600;font-size:19px;
    text-transform:uppercase;letter-spacing:.09em;color:var(--ivory);white-space:nowrap}
  .nav-links{display:none;align-items:center;gap:30px;font-size:14.5px;font-weight:500;
    letter-spacing:.03em;color:var(--ivory-dim);text-transform:uppercase}
  .nav-links a:hover{color:var(--gold)}
  .nav-btn{display:inline-flex;align-items:center;background:var(--gold);color:#12100B;
    font-weight:700;font-size:13.5px;letter-spacing:.06em;text-transform:uppercase;
    padding:11px 17px;border-radius:8px;white-space:nowrap}
  .nav-btn:hover{filter:brightness(1.08)}
  @media(min-width:900px){.nav-links{display:flex}}

  /* ---------- hero ---------- */
  .hero{padding:76px 0 68px;text-align:center;overflow:hidden}
  @media(min-width:820px){.hero{padding:118px 0 100px}}
  /* cinematic gold pool + circuit motif */
  .hero::before{
    content:'';position:absolute;inset:0;pointer-events:none;z-index:0;
    background:
      radial-gradient(120% 78% at 50% -18%, rgba(217,164,65,.20), transparent 62%),
      radial-gradient(90% 60% at 50% 120%, rgba(217,164,65,.07), transparent 70%);
  }
  .circuit{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.5;
    -webkit-mask-image:radial-gradient(72% 62% at 50% 42%,#000 20%,transparent 78%);
            mask-image:radial-gradient(72% 62% at 50% 42%,#000 20%,transparent 78%)}
  .hero h1{max-width:15ch;margin:0 auto;text-shadow:0 2px 40px rgba(0,0,0,.6)}
  .hero .lede{margin:22px auto 0;text-align:center}
  .cta-row{margin-top:34px;display:flex;flex-direction:column;gap:12px;align-items:stretch}
  @media(min-width:560px){.cta-row{flex-direction:row;justify-content:center;align-items:center}}
  .microcopy{margin-top:18px;font-size:14.5px;color:var(--ivory-dim);letter-spacing:.02em}
  .trust{margin-top:40px;display:flex;flex-wrap:wrap;gap:12px 30px;justify-content:center;
    font-size:13px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--ivory-dim)}
  .trust span{display:inline-flex;align-items:center;gap:8px;position:relative}
  .trust span+span::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--gold);margin-right:22px}
  .trust svg{width:15px;height:15px;fill:var(--gold);flex-shrink:0}

  /* ---------- problem ---------- */
  .grid-3{display:grid;grid-template-columns:1fr;gap:16px;margin-top:38px}
  @media(min-width:760px){.grid-3{grid-template-columns:repeat(3,1fr);gap:20px}}
  .card{background:var(--char);border:1px solid var(--line);border-radius:var(--r);padding:28px 26px}
  .card .num{font-family:'Oswald',sans-serif;font-size:13px;font-weight:600;letter-spacing:.2em;
    color:var(--gold);display:block;margin-bottom:14px}
  .card h3{margin-bottom:10px}
  .card p{color:var(--ivory-dim);font-size:16px}

  /* ---------- books ---------- */
  .books{display:grid;grid-template-columns:1fr;gap:18px;margin-top:42px}
  @media(min-width:760px){.books{grid-template-columns:repeat(3,1fr);gap:22px}}
  .book{
    background:linear-gradient(178deg,var(--char-2),var(--char));
    border:1px solid var(--line);border-radius:var(--r);
    padding:20px 22px 26px;display:flex;flex-direction:column;
    transition:border-color .16s ease,transform .16s ease,box-shadow .16s ease;position:relative;
  }
  .book:hover{border-color:var(--gold-line);transform:translateY(-4px);box-shadow:0 16px 44px rgba(0,0,0,.5)}
  .book-badge{position:absolute;top:-1px;right:20px;background:var(--gold);color:#12100B;
    font-family:'Inter',sans-serif;font-size:11px;font-weight:800;letter-spacing:.13em;
    text-transform:uppercase;padding:6px 12px;border-radius:0 0 7px 7px}
  .book .kicker{font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
    color:var(--gold);margin-bottom:13px;flex:0 0 auto}
  .book-cover{width:100%;aspect-ratio:17/22;height:auto;object-fit:contain;object-position:top center;border-radius:8px;margin-bottom:18px;background:transparent;border:0;filter:drop-shadow(0 12px 30px rgba(0,0,0,.55))}
  .book h3{margin-bottom:12px}
  .sub-title{font-size:13.5px;color:var(--gold);margin:-6px 0 12px;letter-spacing:.03em;flex:0 0 auto}
  .book .desc{color:var(--ivory-dim);font-size:15.5px;flex:1 1 auto;margin-bottom:22px}
  .book .btn{width:100%}
  .book-alt{flex:0 0 auto;margin-top:11px;text-align:center;font-size:14px;color:var(--ivory-dim)}
  .book-alt a{color:var(--gold);border-bottom:1px solid var(--gold-line)}

  /* ---------- quiz band ---------- */
  .band{background:linear-gradient(140deg,#1E1A0E,#141310 55%,#0F0F11);
    border-top:1px solid var(--gold-line);border-bottom:1px solid var(--gold-line);position:relative;overflow:hidden}
  .band::after{content:'';position:absolute;inset:0;pointer-events:none;
    background:radial-gradient(70% 130% at 78% 50%,rgba(217,164,65,.16),transparent 62%)}
  .band-in{text-align:center;max-width:44rem;margin:0 auto}
  .band h2{max-width:18ch;margin:0 auto}
  .band .lede{margin:18px auto 0}
  .meta{display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:center;margin-top:26px;
    font-size:14.5px;color:var(--ivory-dim)}
  .meta span{display:inline-flex;align-items:center;gap:8px}
  .meta svg{width:15px;height:15px;fill:var(--gold);flex-shrink:0}

  /* ---------- about ---------- */
  .about{display:grid;grid-template-columns:1fr;gap:30px;align-items:start}
  @media(min-width:900px){.about{grid-template-columns:1.15fr .85fr;gap:56px}}
  .about h2+p{margin-top:20px}
  .about p+p{margin-top:16px}
  .about p{color:var(--ivory-dim);font-size:16.5px}
  .pillars{background:var(--char);border:1px solid var(--line);border-radius:var(--r);padding:28px 26px}
  .pillars h3{font-size:1.05rem;letter-spacing:.1em;margin-bottom:18px;color:var(--gold)}
  .pillars ul{list-style:none;display:grid;gap:14px}
  .pillars li{display:flex;gap:12px;font-size:15.5px;color:var(--ivory-dim);line-height:1.55}
  .pillars svg{width:17px;height:17px;fill:var(--gold);flex-shrink:0;margin-top:4px}

  /* ---------- reading / blog ---------- */
  .posts{display:grid;grid-template-columns:1fr;gap:2px;margin-top:34px;
    border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--line)}
  @media(min-width:760px){.posts{grid-template-columns:repeat(2,1fr)}}
  .post{background:var(--char);padding:24px 24px;display:flex;align-items:center;
    justify-content:space-between;gap:16px;transition:background .14s ease}
  .post:hover{background:var(--char-2)}
  .post span{font-size:16px;font-weight:500;line-height:1.4}
  .post svg{width:17px;height:17px;fill:var(--gold);flex-shrink:0}

  /* ---------- email ---------- */
  .email{background:var(--char);border:1px solid var(--line);border-radius:16px;
    padding:34px 24px;text-align:center}
  @media(min-width:820px){.email{padding:54px 48px}}
  .email .lede{margin:16px auto 0}
  form.signup{margin:28px auto 0;display:flex;flex-direction:column;gap:11px;max-width:470px}
  @media(min-width:560px){form.signup{flex-direction:row}}
  form.signup input{
    flex:1;background:var(--ink);border:1.5px solid var(--line);color:var(--ivory);
    padding:16px 18px;border-radius:10px;font-size:16px;font-family:inherit;min-height:56px;
  }
  form.signup input::placeholder{color:#7E786B}
  form.signup input:focus{outline:none;border-color:var(--gold)}
  form.signup button{flex-shrink:0}
  .fine{margin-top:15px;font-size:14px;color:var(--ivory-dim)}

  /* ---------- footer ---------- */
  footer{background:#050505;border-top:1px solid var(--line);padding:56px 0 44px;position:relative;z-index:2}
  .foot{display:grid;grid-template-columns:1fr;gap:34px}
  @media(min-width:820px){.foot{grid-template-columns:1.4fr 1fr 1fr;gap:48px}}
  .foot p{color:var(--ivory-dim);font-size:15.5px;margin-top:14px;max-width:36ch}
  .promise{font-family:'Oswald',sans-serif;text-transform:uppercase;letter-spacing:.04em;
    color:var(--gold)!important;font-size:16.5px!important;line-height:1.25}
  .foot h4{font-family:'Oswald',sans-serif;font-size:13.5px;font-weight:600;letter-spacing:.16em;
    text-transform:uppercase;color:var(--gold);margin-bottom:16px}
  .foot ul{list-style:none;display:grid;gap:11px}
  .foot ul a{color:var(--ivory-dim);font-size:15.5px}
  .foot ul a:hover{color:var(--gold)}
  .socials{display:flex;gap:11px;margin-top:20px}
  .socials a{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
    display:grid;place-items:center;background:var(--char);transition:border-color .14s ease}
  .socials a:hover{border-color:var(--gold)}
  .socials svg{width:19px;height:19px;fill:var(--ivory-dim)}
  .socials a:hover svg{fill:var(--gold)}
  .legal{margin-top:44px;padding-top:26px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px 22px;justify-content:space-between;
    color:#7E786B;font-size:14px}

  /* ---- store additions ---- */
  .hero-sub{padding:64px 0 56px}
  @media(min-width:820px){.hero-sub{padding:92px 0 72px}}
  .hero-sub h1{font-size:clamp(2.1rem,7.5vw,3.9rem)}
  .crumbs{font-size:13.5px;color:var(--ivory-dim);margin-bottom:26px;letter-spacing:.04em;text-transform:uppercase}
  .crumbs a{color:var(--gold)}
  .fmt{font-size:13.5px;color:var(--ivory-dim);letter-spacing:.05em;text-transform:uppercase;margin-top:2px}
  .price{font-family:'Oswald',sans-serif;font-size:26px;font-weight:600;color:var(--gold)}
  .price-row{margin:14px 0 16px;min-height:10px}
  .book .btn{width:100%}
  .books-2{grid-template-columns:1fr}
  @media(min-width:760px){.books-2{grid-template-columns:repeat(2,1fr)}}
  .book-wide .book-cover-wide{aspect-ratio:auto;object-fit:contain;filter:none}
  .band-inline{display:flex;flex-direction:column;gap:24px;background:linear-gradient(140deg,#1E1A0E,#141310 55%,#0F0F11);
    border:1px solid var(--gold-line);border-radius:18px;padding:clamp(26px,4.5vw,44px)}
  @media(min-width:820px){.band-inline{flex-direction:row;align-items:center;justify-content:space-between}
    .band-inline .btn{flex-shrink:0}}
  .detail{display:grid;grid-template-columns:1fr;gap:34px;align-items:start;margin-top:6px}
  @media(min-width:820px){.detail{grid-template-columns:.72fr 1.28fr;gap:56px}}
  .detail-cover img{width:100%;max-width:380px;border-radius:10px;border:1px solid var(--line);
    box-shadow:0 18px 50px rgba(0,0,0,.6)}
  .cta-col{margin-top:26px;max-width:420px}
  .cta-col .btn{width:100%}
  .split{display:grid;grid-template-columns:1fr;gap:34px}
  @media(min-width:900px){.split{grid-template-columns:1.15fr .85fr;gap:56px}}
  .ticks{list-style:none;display:grid;gap:12px;margin-top:18px}
  .ticks li{display:flex;gap:11px;color:var(--ivory-dim);font-size:16px}
  .ticks svg,.pillars svg{width:17px;height:17px;fill:var(--gold);flex-shrink:0;margin-top:4px}
  .mt{margin-top:34px}

/* format block — one row per available edition */
.formats{display:flex;flex-direction:column;gap:10px;margin-top:20px;max-width:520px}
.fmt-row{display:grid;grid-template-columns:1fr auto;grid-template-areas:"name price" "meta price";
  align-items:center;gap:2px 16px;padding:14px 18px;border:1px solid rgba(212,175,90,.34);
  text-decoration:none;transition:border-color .18s ease,background .18s ease}
.fmt-row:hover,.fmt-row:focus-visible{border-color:rgba(212,175,90,.85);background:rgba(212,175,90,.06)}
.fmt-row .fmt-name{grid-area:name;font-weight:700;letter-spacing:.01em}
.fmt-row .fmt-meta{grid-area:meta;font-size:13px;opacity:.72}
.fmt-row .fmt-price{grid-area:price;font-weight:700;font-size:19px;white-space:nowrap;
  font-variant-numeric:tabular-nums}
.fmt-primary{border-color:rgba(212,175,90,.9);background:rgba(212,175,90,.10)}
@media (max-width:460px){.fmt-row{padding:12px 14px}.fmt-row .fmt-price{font-size:17px}}