/* ===========================================================================
   OSP  ·  Oil Solutions Partner
   Brand colours sampled from the supplied logo file.
   =========================================================================== */

:root{
  --navy:#002868;          /* the mark and the OSP letters */
  --navy-900:#001a44;
  --navy-700:#043076;
  --blue:#004098;          /* the OIL SOLUTIONS line */
  --blue-mid:#486898;      /* the droplet highlight */
  --gold:#d8c078;          /* the second face of the droplet */
  --gold-deep:#b89c48;
  --sand:#e0d0a0;
  --ink:#141d2b;
  --body:#4a596d;
  --muted:#7a879a;
  --line:#e2e7ee;
  --line-soft:#eef1f6;
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --bg-deep:#0a1e40;
  --ok:#1d7a4c;
  --warn:#9a6a00;
  --bad:#b5281e;
  --r:14px;
  --r-sm:10px;
  --shadow:0 1px 2px rgba(10,25,55,.05), 0 8px 28px rgba(10,25,55,.06);
  --shadow-lg:0 20px 60px rgba(10,25,55,.14);
  --max:1180px;
  --head-h:76px;
  --ease:cubic-bezier(.22,.8,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html{overflow-x:clip}
body{
  margin:0;background:var(--bg);color:var(--body);
  font:400 16.5px/1.7 "Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--navy)}
h1,h2,h3,h4{color:var(--ink);margin:0 0 .5em;line-height:1.18;letter-spacing:-.015em;font-weight:800}
h1{font-size:clamp(2rem,4.6vw,3.35rem)}
h2{font-size:clamp(1.55rem,3vw,2.3rem)}
h3{font-size:1.18rem;letter-spacing:-.01em}
p{margin:0 0 1.1em}
.wrap{max-width:var(--max);margin-inline:auto;padding-inline:22px}
/* stop grid and flex children forcing a track wider than the page */
.grid > *,.split > *,.hero .wrap > *,.contact-grid > *,.makers > *,
.stats .wrap > *,.hero-strip .wrap > *,.foot-grid > *{min-width:0}
.narrow{max-width:820px}
.center{text-align:center}
.mt0{margin-top:0}.mb0{margin-bottom:0}

/* skip link ---------------------------------------------------------------- */
.skip{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;
  background:var(--navy);color:#fff;padding:12px 20px;z-index:200;border-radius:0 0 8px 0}
.skip:focus{position:fixed;left:0;top:0;width:auto;height:auto;clip-path:none;overflow:visible}

/* ------------------------------------------------------------------ header */
.topbar{background:var(--navy-900);color:#9fb6d6;font-size:13.5px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:40px;flex-wrap:wrap}
.topbar a{color:#cfdcee}
.topbar a:hover{color:var(--gold)}
.topbar .tb-left{display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.topbar .tb-tag{color:var(--gold);font-weight:600;letter-spacing:.02em}

.site-head{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(1.6) blur(10px);border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease)}
.site-head.stuck{box-shadow:0 6px 24px rgba(10,25,55,.09)}
.site-head .wrap{display:flex;align-items:center;gap:24px;min-height:var(--head-h)}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand img{height:46px;width:auto}
nav.main{margin-left:auto;display:flex;align-items:center;gap:4px}
nav.main a{
  color:var(--ink);font-weight:600;font-size:15px;padding:10px 13px;border-radius:9px;
  position:relative;white-space:nowrap;letter-spacing:-.005em;
}
nav.main a:hover{background:var(--bg-alt);color:var(--navy)}
nav.main a.on{color:var(--navy)}
nav.main a.on::after{content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2.5px;
  background:var(--gold);border-radius:2px}
/* the quote button lives inside the nav, and `nav.main a` is the more specific
   selector, so without this it inherits the dark nav link colour and renders
   dark text on a navy button. */
nav.main a.btn{color:#fff}
nav.main a.btn:hover{background:var(--navy-700);color:#fff}
nav.main a.btn.on::after{display:none}
.btn-quote{margin-left:10px}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);
  width:46px;height:42px;border-radius:10px;cursor:pointer;align-items:center;justify-content:center}
.burger span{display:block;width:20px;height:2px;background:var(--navy);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--navy)}
.burger span::before{top:-6px}.burger span::after{top:6px}

/* ------------------------------------------------------------------ buttons */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 24px;border-radius:11px;
  font-weight:700;font-size:15px;border:1.5px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
  letter-spacing:-.005em;line-height:1}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--navy);color:#fff;box-shadow:0 6px 18px rgba(0,40,104,.26)}
.btn-primary:hover{background:var(--navy-700);color:#fff;box-shadow:0 10px 26px rgba(0,40,104,.32)}
.btn-gold{background:var(--gold);color:var(--navy-900);box-shadow:0 6px 18px rgba(184,156,72,.3)}
.btn-gold:hover{background:var(--sand);color:var(--navy-900)}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff}
.btn-line{border-color:var(--line);color:var(--navy);background:#fff}
.btn-line:hover{border-color:var(--navy);background:var(--bg-alt);color:var(--navy)}
.btn-sm{padding:9px 16px;font-size:14px}

/* --------------------------------------------------------------------- hero */
.hero{position:relative;background:var(--bg-deep);color:#fff;overflow:hidden;
  isolation:isolate;padding-block:0}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(900px 540px at 78% 18%, rgba(72,104,152,.55), transparent 62%),
    radial-gradient(680px 460px at 12% 88%, rgba(216,192,120,.16), transparent 64%),
    linear-gradient(152deg, #04152f 0%, #002868 48%, #04203f 100%);}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:62px 62px;
  mask-image:radial-gradient(circle at 60% 40%, #000 20%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 60% 40%, #000 20%, transparent 78%);}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:48px;
  align-items:center;padding-block:clamp(56px,8vw,104px)}
.hero h1{color:#fff;margin-bottom:.4em;text-wrap:balance}
.hero h1 .accent{
  background:linear-gradient(100deg,var(--gold) 20%,var(--sand) 80%);
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p.lead{font-size:clamp(1.02rem,1.5vw,1.16rem);color:#c3d3e8;max-width:52ch;margin-bottom:2em}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;font-weight:800;
  letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:20px}
.eyebrow::before{content:"";width:30px;height:2px;background:var(--gold);border-radius:2px}
.hero-cta{display:flex;gap:13px;flex-wrap:wrap}

.hero-art{position:relative;display:grid;place-items:center;min-height:300px}
.hero-art .glow{position:absolute;width:100%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(144,176,224,.3) 0%,transparent 62%);filter:blur(14px)}
.hero-art img{position:relative;filter:drop-shadow(0 28px 52px rgba(0,0,0,.5));
  border-radius:var(--r);background:#fff;padding:18px}
.hero-strip{position:relative;border-top:1px solid rgba(255,255,255,.12);
  background:rgba(0,0,0,.2)}
.hero-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding-block:20px}
.hs{display:flex;gap:13px;align-items:flex-start}
.hs svg{flex:0 0 auto;width:22px;height:22px;color:var(--gold);margin-top:3px}
.hs b{display:block;color:#fff;font-size:14.5px;line-height:1.35}
.hs span{font-size:13px;color:#9fb6d6;line-height:1.45}

/* ------------------------------------------------------------------ sections */
section{padding-block:clamp(54px,7vw,88px)}
section.alt{background:var(--bg-alt)}
section.tight{padding-block:clamp(40px,5vw,60px)}
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head p{font-size:17px;margin-bottom:0;color:var(--body)}
.rule{width:52px;height:3px;background:var(--gold);border-radius:3px;margin-bottom:18px}
.sec-head.center .rule{margin-inline:auto}

/* --------------------------------------------------------------------- cards */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#d3dbe6}
.card .ph{height:210px;background:
    radial-gradient(circle at 50% 42%, #ffffff 0%, #f1f4f8 72%);
  display:grid;place-items:center;padding:18px;border-bottom:1px solid var(--line-soft);
  overflow:hidden}
.card .ph img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;
  mix-blend-mode:multiply;transition:transform .3s var(--ease)}
.card:hover .ph img{transform:scale(1.055)}
.card .bd{padding:18px 20px 22px}
.card h3{margin-bottom:6px;font-size:16.5px;color:var(--navy)}
.card p{font-size:14.5px;margin:0;color:var(--body);line-height:1.6}

/* icon tile, used where no photograph exists */
.icon-tile{width:100%;height:100%;display:grid;place-items:center}
.icon-tile svg{width:88px;height:88px;color:var(--blue-mid);opacity:.9}

/* service card ------------------------------------------------------------- */
.svc{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  position:relative;overflow:hidden}
.svc::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--gold);
  transform:scaleY(0);transform-origin:top;transition:transform .28s var(--ease)}
.svc:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#d3dbe6}
.svc:hover::before{transform:scaleY(1)}
.svc .ic{width:50px;height:50px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(140deg,rgba(0,64,152,.1),rgba(216,192,120,.18))}
.svc .ic svg{width:25px;height:25px;color:var(--navy)}
.svc h3{font-size:16.5px;margin-bottom:7px;color:var(--navy)}
.svc p{font-size:14.5px;margin:0;line-height:1.62}

/* stat band ---------------------------------------------------------------- */
.stats{background:linear-gradient(135deg,var(--navy) 0%,#063b86 55%,#002355 100%);color:#fff;
  position:relative;overflow:hidden}
.stats::after{content:"";position:absolute;inset:0;opacity:.35;
  background-image:linear-gradient(115deg,transparent 46%,rgba(216,192,120,.22) 50%,transparent 54%);
  background-size:26px 26px}
.stats .wrap{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:26px;
  padding-block:clamp(38px,5vw,56px)}
.stat{text-align:center}
.stat .v{font-size:clamp(1.8rem,3.4vw,2.6rem);font-weight:800;color:var(--gold);line-height:1.1;
  letter-spacing:-.02em}
.stat .l{font-size:14px;color:#c3d3e8;margin-top:6px;line-height:1.45}

/* split feature ------------------------------------------------------------ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,60px);align-items:center}
.split .fig{border-radius:var(--r);overflow:hidden;background:var(--bg-alt);
  border:1px solid var(--line);padding:30px;display:grid;place-items:center;
  width:100%;min-height:330px;aspect-ratio:4/3}
.split .fig img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;
  mix-blend-mode:multiply}
ul.ticks{list-style:none;padding:0;margin:0 0 1.5em}
ul.ticks li{position:relative;padding:7px 0 7px 32px;font-size:15.5px}
ul.ticks li::before{content:"";position:absolute;left:0;top:14px;width:17px;height:17px;border-radius:50%;
  background:rgba(0,64,152,.1)}
ul.ticks li::after{content:"";position:absolute;left:5.5px;top:19px;width:6px;height:10px;
  border:solid var(--navy);border-width:0 2px 2px 0;transform:rotate(42deg)}

/* chip list ---------------------------------------------------------------- */
.chips{display:flex;flex-wrap:wrap;gap:9px;margin:0;padding:0;list-style:none}
.chips li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 15px;
  font-size:14px;font-weight:600;color:var(--navy);transition:all .18s var(--ease)}
.chips li:hover{border-color:var(--gold);background:#fffdf6}

/* manufacturers ------------------------------------------------------------ */
.makers{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.maker{background:#fff;border:1px solid var(--line);border-radius:var(--r);height:120px;
  display:grid;place-items:center;padding:22px;transition:all .22s var(--ease)}
.maker:hover{border-color:#d3dbe6;box-shadow:var(--shadow);transform:translateY(-3px)}
.maker img{max-height:46px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.62;
  transition:all .25s var(--ease)}
.maker:hover img{filter:none;opacity:1}

/* cta band ----------------------------------------------------------------- */
.cta{background:linear-gradient(135deg,#04152f,#002868 60%,#063b86);color:#fff;position:relative;
  overflow:hidden}
.cta::after{content:"";position:absolute;right:-90px;top:-90px;width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(216,192,120,.2),transparent 68%)}
.cta .wrap{position:relative;display:flex;justify-content:space-between;align-items:center;gap:30px;
  flex-wrap:wrap;padding-block:clamp(38px,5vw,56px)}
.cta h2{color:#fff;margin-bottom:8px}
.cta p{color:#c3d3e8;margin:0;max-width:56ch}

/* page header -------------------------------------------------------------- */
.page-head{background:linear-gradient(140deg,#04152f,#002868 62%,#06346f);color:#fff;
  position:relative;overflow:hidden}
.page-head::after{content:"";position:absolute;inset:0;opacity:.4;
  background-image:linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 100%;
  mask-image:linear-gradient(90deg,transparent,#000 40%,transparent);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 40%,transparent)}
.page-head .wrap{position:relative;padding-block:clamp(42px,6vw,72px)}
.page-head h1{color:#fff;margin-bottom:.3em}
.page-head p{color:#c3d3e8;max-width:62ch;font-size:17px;margin:0}
.crumb{font-size:13.5px;color:#9fb6d6;margin-bottom:16px}
.crumb a{color:#c3d3e8}
.crumb a:hover{color:var(--gold)}
.crumb span{opacity:.5;margin-inline:8px}

/* contact ------------------------------------------------------------------ */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:start}
.info-card{background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--r);padding:28px}
.info-row{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.info-row:last-child{border-bottom:0;padding-bottom:0}
.info-row svg{flex:0 0 auto;width:20px;height:20px;color:var(--navy);margin-top:4px}
.info-row .k{font-size:12.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);
  font-weight:700;margin-bottom:2px}
.info-row .v{font-weight:600;color:var(--ink);font-size:15.5px;word-break:break-word}
.info-row .v a{color:var(--navy)}

form .fg{margin-bottom:17px}
form label{display:block;font-size:13.5px;font-weight:700;color:var(--ink);margin-bottom:6px}
form label .req{color:var(--bad)}
form input,form select,form textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--r-sm);
  font:inherit;font-size:15px;color:var(--ink);background:#fff;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
form input:focus,form select:focus,form textarea:focus{
  outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,64,152,.12)}
form textarea{min-height:140px;resize:vertical}
.fg2{display:grid;grid-template-columns:1fr 1fr;gap:17px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.note{font-size:13px;color:var(--muted);margin-top:12px}

.alert{padding:14px 18px;border-radius:var(--r-sm);margin-bottom:22px;font-size:15px;font-weight:600;
  border-left:4px solid}
.alert-ok{background:#e9f6ef;color:#145c38;border-color:var(--ok)}
.alert-bad{background:#fdecea;color:#8d2018;border-color:var(--bad)}

/* map ---------------------------------------------------------------------- */
.map{border-radius:var(--r);overflow:hidden;border:1px solid var(--line);line-height:0}
.map iframe{width:100%;height:340px;border:0}

/* ------------------------------------------------------------------- footer */
.site-foot{background:var(--navy-900);color:#9fb6d6;font-size:14.5px;padding-top:54px}
.site-foot h4{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:.1em;margin-bottom:16px}
.site-foot a{color:#c3d3e8}
.site-foot a:hover{color:var(--gold)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px}
.foot-grid ul{list-style:none;padding:0;margin:0}
.foot-grid li{padding:5px 0}
.foot-brand img{height:52px;background:#fff;border-radius:10px;padding:8px 12px;margin-bottom:16px}
.foot-brand p{font-size:14.5px;line-height:1.65;color:#9fb6d6;max-width:34ch}
.foot-bot{border-top:1px solid rgba(255,255,255,.1);padding-block:20px;display:flex;
  justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13.5px}

/* reveal on scroll --------------------------------------------------------- */
/* content is visible by default; it only starts hidden when scripting is on,
   so nothing can ever stay invisible if the script fails to load */
.js .rv{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .rv{opacity:1;transform:none;transition:none}
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
}

/* ------------------------------------------------------------- responsive */
@media (max-width:1080px){
  .g4{grid-template-columns:repeat(3,1fr)}
  .makers{grid-template-columns:repeat(4,1fr)}
  nav.main a{padding:10px 10px;font-size:14.5px}
}
@media (max-width:920px){
  .burger{display:flex}
  /* off canvas menu. It is display:none when closed, on purpose: an element
     translated off screen still counts toward the page scroll width and gives
     the whole site a phantom horizontal scrollbar on a phone. */
  nav.main{display:none;position:fixed;inset:0 0 0 auto;width:min(84vw,330px);background:#fff;
    flex-direction:column;align-items:stretch;gap:2px;padding:92px 20px 28px;
    box-shadow:-18px 0 50px rgba(10,25,55,.22);overflow-y:auto;z-index:99}
  nav.main.open{display:flex;animation:navIn .28s var(--ease) both}
  @keyframes navIn{from{transform:translateX(100%)}to{transform:none}}
  nav.main a{padding:14px 14px;font-size:16px;border-radius:10px}
  nav.main a.on::after{display:none}
  nav.main a.on{background:var(--bg-alt)}
  .btn-quote{margin:14px 0 0}
  .hero .wrap{grid-template-columns:1fr;gap:34px}
  .hero-art{order:-1;min-height:0}
  .hero-art img{max-width:min(390px,100%)}
  .hero-strip .wrap{grid-template-columns:repeat(2,1fr);gap:20px}
  .split{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:680px){
  :root{--head-h:66px}
  .brand img{height:38px}
  .g2,.g3,.g4{grid-template-columns:repeat(2,1fr)}
  .makers{grid-template-columns:repeat(2,1fr)}
  .fg2{grid-template-columns:1fr}
  .topbar .tb-left{gap:14px}
  .card .ph{height:150px;padding:14px}
  .card .bd{padding:14px 15px 18px}
  .card h3{font-size:15px}
  .card p{font-size:13.5px}
  .cta .wrap{flex-direction:column;align-items:flex-start}
}
@media (max-width:460px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .card .ph{height:200px}
  .hero-strip .wrap{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .stats .wrap{grid-template-columns:1fr 1fr}
}

/* print -------------------------------------------------------------------- */
@media print{
  .site-head,.topbar,.burger,.cta,.site-foot,.hero-cta{display:none!important}
  body{font-size:11pt}
  .card,.svc{break-inside:avoid;box-shadow:none}
}