/* 
  Desktop replica uses a single high-res PNG render of the PDF for pixel matching.
  Responsive version is semantic and appears on small screens.
*/

:root{
  --dark:#05070b;
  --darker:#020409;
  --light:#f6f7f9;
  --text:#0f172a;
  --muted:#64748b;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:#0b0d12;
  color:var(--text);
}

/* ---------- Desktop PDF replica ---------- */
.desktop-replica{
  display:block;
  background:#000;
}
.desktop-replica img{
  display:block;
  width:1024px;   /* fixed desktop width close to PDF */
  height:auto;
  margin:0 auto;
}

/* Hide responsive content on desktop */
.responsive-content{display:none;}

/* ---------- Responsive semantic version ---------- */
@media (max-width: 1023px){
  .desktop-replica{display:none;}
  .responsive-content{display:block; background:#fff;}

  .hero{
    min-height:44vh;
    padding:28px 20px;
    background:
      linear-gradient(180deg, rgba(0,0,0,.35), rgba(0,0,0,.75)),
      #111;
    color:#fff;
    display:flex; align-items:center;
    text-align:left;
  }
  .kicker{
    font-family:Montserrat, sans-serif;
    letter-spacing:.18em;
    font-weight:600;
    font-size:12px;
    opacity:.9;
  }
  .hero h1{
    font-family:Montserrat, sans-serif;
    font-size:38px;
    margin:.4rem 0;
    line-height:1.05;
    font-weight:800;
    letter-spacing:.02em;
  }
  .subkicker{
    font-size:11px;
    letter-spacing:.22em;
    opacity:.95;
  }

  section{padding:22px 18px;}
  section:nth-child(even){background:var(--light);}

  h2{
    font-family:Montserrat, sans-serif;
    font-size:22px;
    margin:0 0 8px;
    font-weight:800;
  }
  p{line-height:1.7; font-size:15px; margin:0 0 10px;}
  ul,ol{padding-left:18px; line-height:1.7; font-size:15px; margin:8px 0 0;}

  .goldmine .cards{
    display:grid; gap:12px;
  }
  .card{
    background:#fff;
    border:1px solid #e5e7eb;
    border-radius:12px;
    padding:14px;
    box-shadow:0 4px 12px rgba(0,0,0,.05);
  }
  .card h3{
    margin:0 0 6px;
    font-size:16px;
    font-weight:800;
  }
  .card h3 span{font-weight:600; color:var(--muted); font-size:12px;}

  .topics__list{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:6px 12px;
  }
  .frameworks .framework{
    background:#fff;
    border:1px dashed #e5e7eb;
    padding:10px 12px;
    border-radius:10px;
    margin-top:8px;
  }
  .framework h3{margin:0 0 4px; font-size:15px; font-weight:800;}

  blockquote{
    margin:8px 0 6px;
    padding:10px 12px;
    border-left:4px solid #111;
    background:#fff;
    border-radius:8px;
    font-size:14px;
  }

  .cta{
    background:#111;
    color:#fff;
    padding:28px 18px;
    text-align:center;
  }
  .cta h2{font-size:20px; margin:0;}
  .footnote{font-size:12.5px; color:var(--muted); margin-top:10px;}
}