:root{
  --paper:#FFFFFF; --surface2:#F3F4F6; --hairline:rgba(15,18,22,.10);
  --ink:#0F1216; --ink2:#262B33; --mute:#5A6270;
  --brand:#E55B14; --brandDk:#B84409; --brandLt:#FFE4D3;
  --sans:'Archivo','Inter',ui-sans-serif,system-ui,-apple-system,sans-serif;
  --display:'Archivo Narrow','Archivo',Impact,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;
  --maxw:780px;
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;letter-spacing:-0.003em}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(140%) blur(10px);-webkit-backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--hairline)}
.nav-inner{display:flex;align-items:center;gap:32px;height:68px;
  max-width:1200px;margin:0 auto;padding:0 24px}
.logo{display:inline-flex;align-items:center;gap:10px;
  font-family:'Inter',ui-sans-serif,system-ui,sans-serif;font-weight:900;
  text-transform:uppercase;font-size:20px;letter-spacing:-0.025em;color:var(--ink)}
.logo-mark{width:32px;height:32px;flex-shrink:0;
  background:url('fieldops-mark.png') center/contain no-repeat;border-radius:6px}
.nav-spacer{flex:1}
.nav-back{font-size:14.5px;font-weight:500;color:var(--ink2);transition:color .15s}
.nav-back:hover{color:var(--brand);text-decoration:none}

/* article */
article{padding:64px 0 96px}
article .meta{font-family:var(--mono);font-weight:700;font-size:11.5px;
  text-transform:uppercase;letter-spacing:0.14em;color:var(--mute);margin-bottom:14px}
article h1{font-family:var(--display);font-weight:800;font-stretch:75%;
  text-transform:uppercase;font-size:clamp(40px,5.2vw,64px);line-height:.92;
  letter-spacing:-0.01em;margin:0 0 12px;color:var(--ink)}
article .updated{font-family:var(--mono);font-size:13px;color:var(--mute);margin:0 0 36px}
article h2{font-family:var(--display);font-weight:800;font-stretch:75%;
  text-transform:uppercase;font-size:24px;line-height:1;letter-spacing:-0.005em;
  margin:36px 0 12px;color:var(--ink);padding-top:8px;border-top:1px solid var(--hairline)}
article h2:first-of-type{border-top:none;padding-top:0}
article h3{font-weight:700;font-size:17px;margin:22px 0 8px;color:var(--ink)}
article p,article li{font-size:16px;line-height:1.6;color:var(--ink2);margin:0 0 12px}
article ul,article ol{padding-left:20px;margin:0 0 16px}
article ul li,article ol li{margin-bottom:6px}
article strong{color:var(--ink);font-weight:600}
article code{font-family:var(--mono);font-size:13.5px;background:var(--surface2);
  padding:2px 6px;border-radius:4px;color:var(--ink)}
article .callout{background:var(--brandLt);border-left:3px solid var(--brand);
  padding:14px 18px;border-radius:6px;margin:18px 0;font-size:14.5px;color:#3D1405}
article .callout p:last-child{margin-bottom:0}

/* btn */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 20px;border-radius:6px;border:1px solid transparent;
  font:600 14.5px/1 var(--sans);cursor:pointer;
  transition:transform .12s cubic-bezier(.2,.7,.2,1),background .15s,border-color .15s}
.btn:active{transform:scale(.98)}
.btn-brand{background:var(--brand);color:#fff;border-color:var(--brand);
  box-shadow:0 1px 0 rgba(0,0,0,.04),0 6px 16px rgba(229,91,20,.28)}
.btn-brand:hover{background:var(--brandDk);border-color:var(--brandDk);text-decoration:none}
.btn-ghost{background:transparent;color:var(--ink);border-color:#D0D4DA}
.btn-ghost:hover{border-color:var(--ink);text-decoration:none}

/* footer */
footer{background:#0A0C10;color:#9CA3AF;padding:48px 0 28px;margin-top:64px}
footer .wrap{max-width:1200px}
footer .top{display:flex;align-items:center;gap:14px;margin-bottom:24px}
footer .logo{color:#fff}
footer .legal{display:flex;gap:18px;flex-wrap:wrap;padding-top:24px;
  border-top:1px solid #1D232C;font-size:12.5px;color:#6B7280}
footer .legal a{color:#6B7280;font-size:12.5px}
footer .legal a:hover{color:var(--brand)}
footer .legal .sep{margin-left:auto}
@media (max-width:520px){footer .legal .sep{margin-left:0;width:100%}}