:root{--navy:#0b1d2a;--steel:#162f40;--yellow:#f5c84c;--paper:#f7f4ed;--ink:#18232b;--muted:#65727a;--line:#d9dde0}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.68}a{color:#0b6db5}nav{background:var(--navy);color:white;position:sticky;top:0;z-index:10;box-shadow:0 2px 16px #0002}.nav-inner{max-width:1160px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:.8rem 1.25rem}.brand{display:flex;align-items:center;gap:.7rem;color:white;text-decoration:none;font-size:1.15rem;font-weight:700;letter-spacing:.02em}.ex{display:grid;place-items:center;width:40px;height:40px;background:var(--yellow);color:#111;clip-path:polygon(50% 0,100% 100%,0 100%);padding-top:12px;font-size:.72rem}.navlinks{display:flex;gap:1rem}.navlinks a{color:#dce8ee;text-decoration:none;font-size:.9rem}.navlinks a:hover{color:var(--yellow)}.menu-btn{display:none;background:none;border:0;color:white;font-size:1.4rem}.hero{background:linear-gradient(90deg,#0b1d2af2,#0b1d2a94),url('/wp-content/uploads/2016/06/RefineryIntrinsicSafety.jpg') center/cover;min-height:420px;color:white;display:grid;align-items:center}.hero .wrap{max-width:1160px;margin:auto;padding:4.5rem 1.25rem}.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.78rem;color:var(--yellow);font-weight:800}.hero h1{font-size:clamp(2.4rem,6vw,5rem);line-height:1.02;max-width:820px;margin:.5rem 0 1rem}.hero p{max-width:720px;font-size:1.18rem;color:#e7eef2}.btn{display:inline-block;background:var(--yellow);color:#111!important;text-decoration:none;padding:.78rem 1.05rem;border-radius:6px;font-weight:800}.btn.secondary{background:white;border:1px solid var(--line)}.wrap{max-width:1160px;margin:auto;padding:3rem 1.25rem}.intro-grid{display:grid;grid-template-columns:1.4fr .8fr;gap:3rem}.article-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.2rem;margin-top:1.6rem}.card{border:1px solid var(--line);border-radius:10px;padding:1.4rem;background:white;box-shadow:0 4px 18px #0b1d2a0b}.card h3{margin:.1rem 0 .5rem}.card a{text-decoration:none;color:var(--ink)}.course-box{background:var(--paper);border-left:5px solid var(--yellow);padding:1.5rem;border-radius:0 10px 10px 0}.article-hero{background:var(--paper);border-bottom:1px solid var(--line)}.article-hero .wrap{padding-top:3.2rem;padding-bottom:2.5rem}.article-hero h1{font-size:clamp(2.1rem,5vw,3.8rem);line-height:1.08;margin:.4rem 0}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:3.5rem}.content{min-width:0}.content h2{font-size:1.75rem;margin-top:2.2rem}.content h3{font-size:1.3rem;margin-top:1.8rem}.content img{max-width:100%;height:auto;border-radius:8px}.content figure{margin:1.5rem 0}.content blockquote{border-left:4px solid var(--yellow);margin:1.5rem 0;padding:.5rem 1rem;background:var(--paper)}.sidebar{position:sticky;top:90px;align-self:start}.sidebar .toc{border:1px solid var(--line);padding:1rem;border-radius:8px}.sidebar a{display:block;margin:.45rem 0;text-decoration:none}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%}td,th{border:1px solid var(--line);padding:.6rem}footer{background:var(--navy);color:#cbd7dd;margin-top:4rem;padding:2.5rem max(1.25rem,calc((100% - 1160px)/2));display:grid;grid-template-columns:2fr 1fr;gap:2rem}footer a{display:block;color:white;margin:.35rem 0}.copyright{grid-column:1/-1;border-top:1px solid #ffffff22;padding-top:1rem}.not-found{max-width:700px;margin:15vh auto;padding:2rem}@media(max-width:800px){.navlinks{display:none}.menu-btn{display:block}.menu-open .navlinks{display:flex;position:absolute;top:64px;left:0;right:0;background:var(--navy);padding:1rem;flex-direction:column}.intro-grid,.article-layout{grid-template-columns:1fr}.article-grid{grid-template-columns:1fr}.sidebar{position:static}.hero{min-height:360px}}