/* RGN Supplies — shop-manual / parts-catalog aesthetic */
:root{
  --ink:#15171a;
  --paper:#f6f7f5;
  --panel:#ffffff;
  --steel:#5a6470;
  --line:#d8dcdf;
  --accent:#1a4fbf;
  --accent-dark:#123a8e;
  --tag-bg:#eef2fa;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --display:'Saira Condensed',sans-serif;
  --body:'Inter',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{font-family:var(--body);color:var(--ink);background:var(--paper);line-height:1.6;font-size:16px}
a{color:var(--accent);text-decoration:none}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
img{max-width:100%;display:block}
.wrap{max-width:1100px;margin:0 auto;padding:0 24px}

/* header */
header{background:var(--ink);color:#fff;border-bottom:4px solid var(--accent)}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 0;gap:16px;flex-wrap:wrap}
.logo{font-family:var(--display);font-weight:700;font-size:28px;letter-spacing:.04em;color:#fff;text-transform:uppercase;line-height:1}
.logo span{color:#8fb0f0}
.logo small{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:#9aa3ad;font-weight:400;margin-top:4px}
nav{display:flex;gap:4px;flex-wrap:wrap}
nav a{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#cfd5db;padding:8px 12px;border:1px solid transparent}
nav a:hover{color:#fff;border-color:#39404a}
nav a.active{color:#fff;border-color:var(--accent);background:rgba(26,79,191,.18)}

/* hero */
.hero{background:var(--ink);color:#fff;padding:64px 0 72px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(transparent 31px,rgba(255,255,255,.045) 32px),linear-gradient(90deg,transparent 31px,rgba(255,255,255,.045) 32px);background-size:32px 32px;pointer-events:none}
.hero .wrap{position:relative;z-index:1}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:#8fb0f0;margin-bottom:14px}
.hero h1{font-family:var(--display);font-size:clamp(40px,6vw,68px);font-weight:700;text-transform:uppercase;line-height:1.02;letter-spacing:.01em;max-width:760px}
.hero h1 em{font-style:normal;color:#8fb0f0}
.hero p{max-width:600px;margin-top:18px;color:#b9c0c8;font-size:17px}
.hero-actions{margin-top:30px;display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;font-family:var(--mono);font-size:13px;letter-spacing:.06em;text-transform:uppercase;padding:13px 22px;border:1px solid var(--accent);background:var(--accent);color:#fff}
.btn:hover{background:var(--accent-dark);border-color:var(--accent-dark)}
.btn.ghost{background:transparent;color:#fff;border-color:#4a525d}
.btn.ghost:hover{border-color:#fff}

/* spec strip under hero */
.spec-strip{background:#101215;border-top:1px solid #2a2f36}
.spec-strip .wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0}
.spec-cell{padding:18px 20px;border-left:1px solid #2a2f36}
.spec-cell:first-child{border-left:none}
.spec-cell .k{font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:#7c8590}
.spec-cell .v{font-family:var(--display);font-size:22px;font-weight:600;color:#fff;text-transform:uppercase;letter-spacing:.02em}

/* sections */
section{padding:64px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:34px;border-bottom:2px solid var(--ink);padding-bottom:12px}
.sec-head h2{font-family:var(--display);font-size:34px;font-weight:700;text-transform:uppercase;letter-spacing:.02em}
.sec-head .ref{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--steel);text-transform:uppercase}

/* spec-plate cards (signature) */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.plate{background:var(--panel);border:1px solid var(--line);border-top:3px solid var(--ink);padding:22px}
.plate .pn{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);background:var(--tag-bg);display:inline-block;padding:3px 8px;margin-bottom:12px}
.plate h3{font-family:var(--display);font-size:22px;font-weight:600;text-transform:uppercase;letter-spacing:.02em;margin-bottom:8px}
.plate p{color:var(--steel);font-size:14.5px}
.plate ul{list-style:none;margin-top:12px;border-top:1px solid var(--line)}
.plate li{display:flex;justify-content:space-between;gap:10px;font-size:13px;padding:7px 0;border-bottom:1px solid var(--line)}
.plate li .k{font-family:var(--mono);font-size:11px;color:var(--steel);text-transform:uppercase;letter-spacing:.06em}
.plate li .v{font-weight:600;text-align:right}

/* dark band */
.band{background:var(--ink);color:#fff}
.band h2{color:#fff}
.band .sec-head{border-bottom-color:#39404a}
.band .ref{color:#8a93a0}
.band .plate{background:#1c1f24;border-color:#2e333b;border-top-color:var(--accent)}
.band .plate h3{color:#fff}
.band .plate p{color:#aeb6c0}
.band .plate li{border-color:#2e333b}
.band .plate li .v{color:#fff}

/* article / prose */
.prose{max-width:760px}
.prose h1{font-family:var(--display);font-size:clamp(34px,5vw,52px);text-transform:uppercase;line-height:1.05;margin-bottom:10px}
.prose .meta{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);margin-bottom:28px}
.prose h2{font-family:var(--display);font-size:26px;text-transform:uppercase;margin:36px 0 12px;letter-spacing:.02em}
.prose p{margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 16px 22px}
.prose li{margin-bottom:6px}
table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;background:var(--panel)}
th{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;text-align:left;background:var(--ink);color:#fff;padding:10px 12px}
td{padding:10px 12px;border:1px solid var(--line)}
tr:nth-child(even) td{background:#fafbfa}
.note{border-left:3px solid var(--accent);background:var(--tag-bg);padding:14px 18px;margin:20px 0;font-size:14.5px}

/* contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}

/* footer */
footer{background:#101215;color:#9aa3ad;padding:40px 0;border-top:4px solid var(--accent);margin-top:0}
footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
footer h4{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:#fff;margin-bottom:10px}
footer p,footer a{font-size:14px;color:#9aa3ad}
footer a:hover{color:#fff}
.fineprint{margin-top:28px;padding-top:16px;border-top:1px solid #2a2f36;font-family:var(--mono);font-size:11px;letter-spacing:.06em}

@media(max-width:640px){
  .spec-cell{border-left:none;border-top:1px solid #2a2f36}
  section{padding:44px 0}
}