:root{
  --ink:#101E2E; --ink-soft:#22334A; --paper:#F6F7F4; --white:#FFFFFF;
  --blue:#1D56D6; --blue-deep:#153F9E; --steel:#5A6878; --line:#D7DDE2;
  --line-dark:#2C3E56; --max:1120px; --read:720px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:'Source Serif 4',Georgia,serif;font-size:18px;line-height:1.7;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:'Archivo',sans-serif;line-height:1.12;letter-spacing:-0.015em}
.mono{font-family:'IBM Plex Mono',monospace}
a{color:var(--blue)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.read{max-width:var(--read);margin:0 auto;padding:0 24px}

/* nav */
header{position:fixed;top:0;left:0;right:0;z-index:50;padding:18px 0}
.nav{max-width:1120px;margin:0 auto;padding:0 12px 0 24px;display:flex;align-items:center;justify-content:space-between;height:58px;background:rgba(16,30,46,.95);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.08);border-radius:999px;box-shadow:0 6px 22px rgba(16,30,46,.28)}
.brand{font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:13px;letter-spacing:.14em;text-decoration:none;color:#fff}
.brand .dot{color:#6f9bff}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{font-family:'Archivo',sans-serif;font-size:14px;font-weight:600;text-decoration:none;color:rgba(255,255,255,.72)}
.nav-links a:hover{color:#fff}
.btn,.btn:link,.btn:visited{display:inline-block;font-family:'Archivo',sans-serif;font-weight:700;font-size:14px;padding:11px 20px;border-radius:4px;text-decoration:none;border:1.5px solid var(--blue) !important;background:var(--blue) !important;color:#fff !important;transition:background .15s,border-color .15s}
.btn:hover{background:var(--blue-deep) !important;border-color:var(--blue-deep) !important;color:#fff !important}

/* blog index */
.blog-hero{padding:140px 0 40px;border-bottom:1px solid var(--line)}
.eyebrow{font-family:'IBM Plex Mono',monospace;font-size:12px;font-weight:500;letter-spacing:.16em;color:var(--blue);text-transform:uppercase;display:flex;align-items:center;gap:12px;margin-bottom:20px}
.eyebrow::before{content:"";display:block;width:34px;height:1px;background:var(--blue)}
.blog-hero h1{font-size:clamp(34px,5vw,52px);font-weight:800;max-width:760px}
.blog-hero p{margin-top:18px;max-width:620px;color:var(--ink-soft);font-size:19px}

.post-list{padding:56px 0 88px}
.post-card{display:block;text-decoration:none;color:inherit;padding:32px 0;border-bottom:1px solid var(--line)}
.post-card:first-child{padding-top:0}
.post-card .meta{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.08em;color:var(--steel);text-transform:uppercase;margin-bottom:12px}
.post-card h2{font-size:26px;font-weight:700;max-width:760px;transition:color .15s}
.post-card:hover h2{color:var(--blue)}
.post-card p{margin-top:12px;max-width:700px;color:var(--ink-soft);font-size:17px}
.post-card .more{display:inline-block;margin-top:14px;font-family:'Archivo',sans-serif;font-weight:600;font-size:14px;color:var(--blue)}

/* article */
article{padding:132px 0 56px}
.article-meta{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.08em;color:var(--steel);text-transform:uppercase;margin-bottom:20px}
article h1{font-size:clamp(30px,4.4vw,44px);font-weight:800;margin-bottom:20px}
.standfirst{font-size:21px;line-height:1.55;color:var(--ink-soft);margin-bottom:8px;padding-bottom:32px;border-bottom:1px solid var(--line)}
article h2{font-size:26px;font-weight:700;margin:44px 0 14px}
article h3{font-size:20px;font-weight:700;margin:32px 0 10px}
article p{margin:16px 0;color:var(--ink)}
article ul,article ol{margin:16px 0 16px 26px;color:var(--ink)}
article li{margin:9px 0}
article strong{font-weight:600}
article .callout{margin:32px 0;padding:22px 26px;border-left:2px solid var(--blue);background:linear-gradient(90deg,rgba(29,86,214,.06),rgba(29,86,214,0));font-size:17px;color:var(--ink-soft)}
article .kicker{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);font-weight:600}
.cta-band{margin:56px auto 0;max-width:var(--read);padding:32px 26px;border:1px solid var(--line-dark);border-radius:6px;background:var(--ink);color:var(--paper)}
.cta-band h3{color:#fff;font-size:22px;margin-bottom:10px}
.cta-band p{color:#B9C4D2;font-size:16px;margin-bottom:18px}
.disclaimer{max-width:var(--read);margin:48px auto 0;padding:20px 24px 0;border-top:1px solid var(--line);font-size:13.5px;color:var(--steel);line-height:1.7}
.backlink{max-width:var(--read);margin:40px auto 0;padding:0 24px}
.backlink a{font-family:'Archivo',sans-serif;font-weight:600;font-size:14px;text-decoration:none}

/* related */
.related{background:var(--white);border-top:1px solid var(--line);padding:48px 0}
.related h4{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:640px){.related-grid{grid-template-columns:1fr}}
.related a{display:block;text-decoration:none;color:inherit;padding:20px 22px;border:1px solid var(--line);border-radius:4px;background:var(--paper)}
.related a:hover{border-color:var(--blue)}
.related a .rt{font-family:'Archivo',sans-serif;font-weight:700;font-size:16px}
.related a:hover .rt{color:var(--blue)}

/* footer */
footer{background:var(--ink);color:#8794A6;padding:44px 0;font-size:13.5px}
.foot{max-width:var(--max);margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
footer .brand{color:#fff}
footer .legal{max-width:560px;line-height:1.8;margin-top:16px}
footer nav{display:flex;gap:20px;font-family:'Archivo',sans-serif;font-size:13px}
footer nav a{text-decoration:none;color:#B9C4D2}
footer nav a:hover{color:#fff}

/* mobile hamburger + menu */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;background:transparent;border:0;cursor:pointer;padding:0}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;margin:0 auto;transition:transform .2s,opacity .2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{display:none;flex-direction:column;gap:2px;margin:10px auto 0;max-width:calc(100% - 40px);background:rgba(16,30,46,.97);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:14px 10px;box-shadow:0 12px 34px rgba(16,30,46,.35)}
.mobile-menu a{font-family:'Archivo',sans-serif;font-size:16px;font-weight:600;color:rgba(255,255,255,.86);text-decoration:none;padding:12px 16px;border-radius:10px}
.mobile-menu a:hover,.mobile-menu a:active{background:rgba(255,255,255,.06);color:#fff}
.mobile-menu a.btn{margin-top:6px;text-align:center;color:#fff !important}
.mobile-menu.open{display:flex}
@media(max-width:820px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  header.menu-open .nav{border-bottom-left-radius:0;border-bottom-right-radius:0}
}