/* Versatile Learn - foundry & metallurgical instrument calibration hub.
   Brand: #29629C blue, #333132 ink; Montserrat headings, system-sans body. */
:root{
  --blue:#29629C; --blue-700:#1f4c7a; --blue-050:#eef4fa;
  --ink:#333132; --muted:#5b6470; --line:#e2e8f0; --paper:#ffffff; --bg:#f5f8fb;
  --amber:#b7791f; --green:#1f8a4c;
  --wrap:1120px; --radius:14px;
  --shadow:0 1px 3px rgba(16,42,67,.06),0 8px 26px rgba(16,42,67,.07);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,.brandfont{font-family:"Montserrat",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--ink);line-height:1.18;letter-spacing:-.01em;font-weight:800}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
.narrow{max-width:760px}

/* header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:inline-flex;align-items:center;gap:10px;font-family:"Montserrat";font-weight:800;color:var(--ink);font-size:19px}
.logo img{height:30px}
.nav a{color:var(--muted);font-weight:600;font-size:14.5px;margin-left:20px}
.nav a:hover{color:var(--blue);text-decoration:none}
.nav .cta{background:var(--blue);color:#fff;padding:9px 15px;border-radius:999px}
@media(max-width:640px){.nav a:not(.cta){display:none}}

/* hero */
.hero{background:
  radial-gradient(900px 460px at 10% -20%,rgba(255,255,255,.14),transparent 60%),
  linear-gradient(155deg,#2f6fb0 0%,var(--blue) 48%,#173a5c 100%);
  color:#fff;padding:64px 0 56px}
.hero .eyebrow{font-family:"Montserrat";font-weight:700;letter-spacing:.18em;text-transform:uppercase;font-size:12px;opacity:.9;margin-bottom:14px}
.hero h1{color:#fff;font-size:clamp(30px,5vw,46px);max-width:900px}
.hero p{margin-top:16px;font-size:clamp(17px,2.2vw,20px);max-width:720px;opacity:.94}
.hero .lede-actions{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:"Montserrat";font-weight:700;font-size:15px;
  padding:12px 20px;border-radius:999px;border:1px solid transparent;cursor:pointer}
.btn.primary{background:#fff;color:var(--blue-700)}
.btn.ghost{border-color:rgba(255,255,255,.5);color:#fff}
.btn:hover{text-decoration:none;transform:translateY(-1px)}

/* breadcrumb */
.crumbs{font-size:13.5px;color:var(--muted);padding:16px 0 0}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--blue)}
.crumbs span{margin:0 7px;opacity:.5}

/* article */
.article{background:#fff;margin:26px 0 40px;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:clamp(24px,4vw,52px)}
.article .kicker{color:var(--blue);font-family:"Montserrat";font-weight:700;text-transform:uppercase;letter-spacing:.12em;font-size:12.5px}
.article h1{font-size:clamp(27px,4vw,38px);margin:8px 0 10px}
.article .standfirst{font-size:19px;color:var(--muted);margin-bottom:8px}
.article .meta{font-size:13.5px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:26px}
.article h2{font-size:clamp(22px,2.6vw,27px);margin:38px 0 12px;padding-top:6px}
.article h3{font-size:19px;margin:26px 0 8px;font-weight:700}
.article p{margin:0 0 16px}
.article ul,.article ol{margin:0 0 18px;padding-left:22px}
.article li{margin-bottom:8px}
.article strong{color:var(--ink)}
.toc{background:var(--blue-050);border:1px solid #d8e6f4;border-radius:12px;padding:18px 22px;margin:24px 0 30px}
.toc h2{font-size:14px;text-transform:uppercase;letter-spacing:.08em;color:var(--blue-700);margin:0 0 10px}
.toc ol{margin:0;padding-left:20px}
.toc li{margin-bottom:5px;font-size:15px}

/* tables */
.tbl-scroll{overflow-x:auto;margin:0 0 22px;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:15px;min-width:520px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--bg);font-family:"Montserrat";font-weight:700;font-size:13.5px;color:var(--blue-700)}
tbody tr:last-child td{border-bottom:0}

/* callout */
.note{border-left:4px solid var(--blue);background:var(--blue-050);border-radius:0 10px 10px 0;padding:14px 18px;margin:0 0 22px;font-size:15.5px}
.note.warn{border-left-color:var(--amber);background:#fdf6e9}

/* FAQ */
.faq{margin-top:12px}
.faq details{border:1px solid var(--line);border-radius:11px;margin-bottom:10px;background:#fff;overflow:hidden}
.faq summary{cursor:pointer;padding:15px 18px;font-family:"Montserrat";font-weight:700;font-size:16px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--blue);font-weight:800}
.faq details[open] summary::after{content:"\2013"}
.faq .a{padding:0 18px 16px;color:var(--muted)}

/* CTA */
.cta-band{background:linear-gradient(150deg,var(--blue) 0%,#173a5c 100%);color:#fff;border-radius:var(--radius);padding:34px clamp(22px,4vw,40px);margin:34px 0}
.cta-band h2{color:#fff;font-size:24px;margin:0 0 8px}
.cta-band p{opacity:.92;margin:0 0 18px;max-width:640px}
.cta-band .btn.primary{background:#fff}
.cta-band .btn.ghost{border-color:rgba(255,255,255,.55)}

/* card grid (hub) */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px;margin:8px 0 10px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 20px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;transition:transform .18s,box-shadow .18s}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(16,42,67,.13)}
.card .tag{font-family:"Montserrat";font-weight:700;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--blue)}
.card h3{font-size:19px;margin:8px 0 8px}
.card h3 a{color:var(--ink)}
.card p{font-size:15px;color:var(--muted);margin:0 0 14px;flex:1}
.card .go{font-family:"Montserrat";font-weight:700;font-size:14px;color:var(--blue)}
.section-h{font-family:"Montserrat";font-weight:800;font-size:14px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:34px 0 6px}

/* footer */
.site-footer{background:#12243a;color:#c7d4e3;margin-top:20px;padding:44px 0 30px;font-size:14.5px}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
@media(max-width:720px){.site-footer .cols{grid-template-columns:1fr}}
.site-footer h4{color:#fff;font-family:"Montserrat";font-size:13px;text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}
.site-footer a{color:#c7d4e3;display:block;margin-bottom:8px}
.site-footer a:hover{color:#fff}
.site-footer .fine{margin-top:26px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);color:#8ea3ba;font-size:13px}