:root{
    --bg:#F0F2F4;
    --surface:#FFFFFF;
    --ink:#10151C;
    --ink-soft:#5B6673;
    --line:#D7DCE1;
    --accent:#C86A2C;
    --accent-ink:#FFFFFF;
    --gate:#8B94A0;
    --shadow: 0 1px 2px rgba(16,21,28,0.04), 0 8px 24px -12px rgba(16,21,28,0.12);
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --bg:#0B0F14;
      --surface:#121820;
      --ink:#E8EBEE;
      --ink-soft:#94A0AC;
      --line:#232B33;
      --accent:#E8934A;
      --accent-ink:#10151C;
      --gate:#4A5561;
      --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 12px 32px -14px rgba(0,0,0,0.5);
    }
  }
  :root[data-theme="dark"]{
    --bg:#0B0F14;
    --surface:#121820;
    --ink:#E8EBEE;
    --ink-soft:#94A0AC;
    --line:#232B33;
    --accent:#E8934A;
    --accent-ink:#10151C;
    --gate:#4A5561;
    --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 12px 32px -14px rgba(0,0,0,0.5);
  }

  *{box-sizing:border-box;}
  html{background:var(--bg);}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"Public Sans", ui-sans-serif, system-ui, sans-serif;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;}
  .wrap{max-width:1080px; margin:0 auto; padding:0 32px;}
  h1,h2,h3{font-family:"Fraunces", Georgia, serif; font-weight:600; text-wrap:balance; margin:0;}
  .eyebrow{
    font-family:"IBM Plex Mono", ui-monospace, monospace;
    font-size:12.5px;
    letter-spacing:0.09em;
    text-transform:uppercase;
    color:var(--accent);
  }
  .mono{font-family:"IBM Plex Mono", ui-monospace, monospace;}

  /* nav */
  nav{
    position:sticky; top:0; z-index:10;
    background:color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  nav .wrap{
    display:flex; align-items:center; justify-content:space-between;
    height:72px;
  }
  .brand{display:flex; align-items:center; gap:0; font-family:"Fraunces", serif; font-weight:600; font-size:19px; letter-spacing:-0.01em; white-space:nowrap;}
  .brand a{display:flex; align-items:center; gap:0; text-decoration:none; color:inherit;}
  .brand-mark{width:26px; height:26px; border-radius:7px; flex:none; display:block; margin-right:-4px;}
  .brand-mark.small{width:17px; height:17px; border-radius:4px; margin-right:-3px;}
  .navlinks{display:flex; align-items:center; gap:32px; font-size:14.5px; color:var(--ink-soft);}
  .navlinks a{text-decoration:none;}
  .navlinks a:hover{color:var(--ink);}

  /* mobile nav toggle */
  .nav-toggle-input{position:absolute; opacity:0; pointer-events:none;}
  .nav-toggle{display:none; flex-direction:column; justify-content:center; gap:5px; width:26px; height:22px; cursor:pointer; flex:none;}
  .nav-toggle span{display:block; width:100%; height:2px; background:var(--ink); border-radius:1px; transition:transform .2s ease, opacity .2s ease;}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(2){opacity:0;}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  .nav-toggle-input:focus-visible ~ .nav-toggle{outline:2px solid var(--accent); outline-offset:3px;}
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    background:var(--accent); color:var(--accent-ink);
    font-weight:600; font-size:14.5px;
    padding:11px 20px; border-radius:3px;
    text-decoration:none; border:none; cursor:pointer;
    box-shadow:var(--shadow);
  }
  .btn:focus-visible{outline:2px solid var(--accent); outline-offset:3px;}

  /* hero */
  .hero{padding:96px 0 88px; border-bottom:1px solid var(--line);}
  .hero .eyebrow{margin-bottom:20px; display:block;}
  .hero h1{font-size:clamp(34px, 5vw, 54px); line-height:1.08; max-width:15ch;}
  .hero p.lede{
    font-size:19px; line-height:1.6; color:var(--ink-soft);
    max-width:52ch; margin:24px 0 32px;
  }
  .hero-cta{display:flex; align-items:center; gap:18px; flex-wrap:wrap;}
  .hero-cta .fine{font-size:13.5px; color:var(--ink-soft);}

  /* two-systems diagram */
  .compare{
    display:grid; grid-template-columns:1fr 1fr; gap:1px;
    background:var(--line); border:1px solid var(--line); border-radius:6px; overflow:hidden;
    margin-top:56px; box-shadow:var(--shadow);
  }
  .compare > div{background:var(--surface); padding:28px 26px 32px;}
  .compare h3{font-size:15px; font-family:"IBM Plex Mono", monospace; font-weight:500; text-transform:uppercase; letter-spacing:0.06em;}
  .compare .cap{font-size:13px; color:var(--ink-soft); margin-top:6px; line-height:1.5;}
  .gate-step{
    display:flex; align-items:center; gap:12px;
    padding:11px 0; border-top:1px dashed var(--line); font-size:13.5px;
  }
  .gate-step:first-of-type{border-top:none;}
  .gate-step .lock{
    width:22px; height:22px; flex:none; border-radius:4px;
    border:1.5px solid var(--gate); color:var(--gate);
    display:flex; align-items:center; justify-content:center; font-size:12px;
  }
  .gate-step .val{margin-left:auto; font-family:"IBM Plex Mono",monospace; color:var(--ink-soft); font-size:12.5px;}
  .path-step{
    display:flex; align-items:center; gap:12px;
    padding:11px 0; border-top:1px dashed var(--line); font-size:13.5px;
  }
  .path-step:first-of-type{border-top:none;}
  .path-step .num{
    width:22px; height:22px; flex:none; border-radius:50%;
    background:var(--accent); color:var(--accent-ink);
    display:flex; align-items:center; justify-content:center;
    font-family:"IBM Plex Mono",monospace; font-size:11px; font-weight:600;
  }

  section{padding:88px 0; border-bottom:1px solid var(--line);}
  section:last-of-type{border-bottom:none;}
  .section-head{max-width:56ch; margin-bottom:48px;}
  .section-head .eyebrow{margin-bottom:14px; display:block;}
  .section-head h2{font-size:clamp(26px,3.4vw,36px); line-height:1.15;}
  .section-head p{color:var(--ink-soft); font-size:16.5px; line-height:1.6; margin-top:14px;}

  /* ICP cards */
  .icp-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:6px; overflow:hidden;}
  .icp-card{background:var(--surface); padding:30px 26px;}
  .icp-card .stage{font-family:"IBM Plex Mono",monospace; font-size:12px; text-transform:uppercase; letter-spacing:0.07em; color:var(--accent);}
  .icp-card h3{font-size:19px; margin-top:10px; font-weight:600;}
  .icp-card p{font-size:14.5px; color:var(--ink-soft); line-height:1.6; margin-top:10px;}

  /* services */
  .svc-grid{display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:6px; overflow:hidden;}
  .svc-card{background:var(--surface); padding:32px 28px;}
  .svc-card.wide{grid-column:1 / -1;}
  .svc-num{font-family:"IBM Plex Mono",monospace; font-size:12.5px; color:var(--ink-soft);}
  .svc-card h3{font-size:20px; margin-top:12px;}
  .svc-card p{font-size:15px; color:var(--ink-soft); line-height:1.65; margin-top:12px;}

  /* credibility / dossier */
  .dossier{border-left:2px solid var(--line); padding-left:28px; display:flex; flex-direction:column; gap:30px;}
  .dossier-item{position:relative;}
  .dossier-item::before{
    content:""; position:absolute; left:-33px; top:5px;
    width:8px; height:8px; border-radius:50%; background:var(--accent);
  }
  .dossier-item .tag{font-family:"IBM Plex Mono",monospace; font-size:12px; color:var(--ink-soft); text-transform:uppercase; letter-spacing:0.05em;}
  .dossier-item p{font-size:16px; line-height:1.65; margin:8px 0 0; max-width:60ch;}
  .dossier-item strong{font-weight:600;}

  /* process */
  .process{display:grid; grid-template-columns:repeat(3,1fr); gap:36px;}
  .phase .pnum{font-family:"Fraunces",serif; font-size:34px; color:var(--accent); font-weight:600;}
  .phase h3{font-size:16.5px; margin-top:6px; font-weight:600;}
  .phase .when{font-family:"IBM Plex Mono",monospace; font-size:12px; color:var(--ink-soft); margin-top:4px; display:block;}
  .phase p{font-size:14.5px; color:var(--ink-soft); line-height:1.6; margin-top:10px;}

  /* final cta */
  .cta-final{text-align:left; padding:96px 0;}
  .cta-final h2{font-size:clamp(30px,4.2vw,46px); max-width:16ch;}
  .cta-final p{color:var(--ink-soft); font-size:17px; margin:18px 0 32px;}

  footer{padding:36px 0 56px;}
  footer .wrap{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; color:var(--ink-soft); font-size:13.5px;}
  footer a{text-decoration:none; border-bottom:1px solid var(--line);}
  .foot-brand{display:inline-flex; align-items:center; gap:5px;}

  @media (max-width:760px){
    .icp-grid, .svc-grid{grid-template-columns:1fr;}
    .compare{grid-template-columns:1fr;}
    .process{grid-template-columns:1fr; gap:28px;}
    .wrap{padding:0 20px;}
    .hero{padding:48px 0 44px;}
    section{padding:56px 0;}

    /* mobile nav: collapse into a dropdown under a hamburger */
    .nav-toggle{display:flex;}
    .navlinks{
      display:flex; flex-direction:column; align-items:stretch; gap:0;
      position:absolute; top:100%; left:0; right:0;
      background:var(--surface); border-bottom:1px solid var(--line);
      box-shadow:var(--shadow);
      max-height:0; overflow:hidden;
      transition:max-height .25s ease;
    }
    .nav-toggle-input:checked ~ .navlinks{max-height:70vh; overflow-y:auto;}
    .navlinks a{
      padding:16px 20px; border-top:1px solid var(--line); text-align:left;
      color:var(--ink);
    }
    .navlinks a:first-child{border-top:none;}
    .navlinks a.btn{
      display:flex; justify-content:center;
      margin:14px 20px; padding:12px 20px;
    }

    /* tighter card/section padding on small screens */
    .compare > div, .icp-card, .svc-card, .res-card{padding:24px 20px;}
    .section-head{margin-bottom:36px;}
    .hero-cta{gap:14px;}
    .cta-final{padding:64px 0;}
  }

  @media (max-width:400px){
    .hero-cta{flex-direction:column; align-items:flex-start; gap:12px;}
  }

  /* faq */
  .faq-list{border-left:2px solid var(--line); padding-left:28px; display:flex; flex-direction:column; gap:32px;}
  .faq-item{position:relative;}
  .faq-item::before{
    content:""; position:absolute; left:-33px; top:7px;
    width:8px; height:8px; border-radius:50%; background:var(--accent);
  }
  .faq-item h3{font-size:17px; font-weight:600; margin:0 0 8px; font-family:"Fraunces", Georgia, serif;}
  .faq-item p{font-size:14.5px; color:var(--ink-soft); line-height:1.65; max-width:66ch; margin:0;}

/* ---- resources index & article pages ---- */
.crumb{
  font-family:"IBM Plex Mono", monospace; font-size:12px; color:var(--ink-soft);
  text-decoration:none; display:inline-flex; align-items:center; gap:6px;
}
.crumb:hover{color:var(--accent);}

.article-hero{padding:56px 0 48px; border-bottom:1px solid var(--line);}
.article-hero .crumb{margin-bottom:28px; display:inline-flex;}
.article-hero h1{font-size:clamp(28px,4vw,42px); line-height:1.15; max-width:20ch;}
.byline{
  font-family:"IBM Plex Mono", monospace; font-size:12.5px; color:var(--ink-soft);
  margin-top:20px; display:flex; gap:10px; flex-wrap:wrap; align-items:center;
}
.byline .dot{width:4px; height:4px; border-radius:50%; background:var(--ink-soft); flex:none;}

.prose{max-width:70ch; padding:56px 0;}
.prose h2{font-size:24px; margin-top:48px; margin-bottom:16px; line-height:1.25;}
.prose h2:first-child{margin-top:0;}
.prose p{font-size:16.5px; line-height:1.75; color:var(--ink); margin:0 0 18px;}
.prose p.lead{font-size:19px; color:var(--ink-soft); line-height:1.6;}
.prose ul, .prose ol{margin:0 0 18px; padding-left:22px;}
.prose li{font-size:16px; line-height:1.7; margin-bottom:8px;}
.prose li::marker{color:var(--accent);}
.prose a{color:var(--accent); text-decoration:underline; text-underline-offset:2px;}
.prose strong{font-weight:600;}
.prose .sources{
  margin-top:48px; padding-top:24px; border-top:1px solid var(--line);
  font-size:13px; color:var(--ink-soft);
}
.prose .sources a{color:var(--ink-soft);}

.article-cta{
  margin:40px 0; padding:28px 30px; background:var(--surface); border:1px solid var(--line);
  border-radius:6px; box-shadow:var(--shadow);
}
.article-cta p{margin:0 0 16px; font-size:16px; color:var(--ink);}
.article-cta p:last-of-type{margin-bottom:0;}

.res-grid{display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:6px; overflow:hidden; margin-top:8px;}
.res-card{background:var(--surface); padding:30px 28px; text-decoration:none; color:inherit; display:block;}
.res-card:hover{background:var(--bg);}
.res-card .tag{font-family:"IBM Plex Mono",monospace; font-size:11.5px; color:var(--accent); text-transform:uppercase; letter-spacing:0.06em;}
.res-card h3{font-size:19px; margin-top:12px; line-height:1.3;}
.res-card p{font-size:14px; color:var(--ink-soft); line-height:1.6; margin-top:10px;}
.res-card .read{font-family:"IBM Plex Mono",monospace; font-size:12px; color:var(--accent); margin-top:16px; display:inline-block;}

@media (max-width:760px){
  .res-grid{grid-template-columns:1fr;}
  .prose{padding:40px 0;}
}