/* Nautilum Energy — site styles. Built on the brand guide system. */
:root{
  --blue:#094E8E;      /* primary */
  --blue-2:#356FB7;    /* secondary / links */
  --lblue:#70A7DA;     /* tint */
  --red:#D22026;       /* accent — tiny highlights only */
  --ink:#0B1B2B;       /* body text / footer */
  --mist:#EEF3F8;      /* alt section bg */
  --line:#e3eaf1;
  --muted:#5a6b7b;
  --white:#ffffff;
  --maxw:1180px;
  --pad:clamp(20px,5vw,40px);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Lato',-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;
  color:var(--ink);font-weight:400;font-size:17px;line-height:1.65;
  background:var(--white);-webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:var(--blue-2);text-decoration:none;transition:color .2s}
a:hover{color:var(--blue)}

.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--pad)}
.section{padding:clamp(56px,9vw,104px) 0}
.section--mist{background:var(--mist)}
.section--blue{background:var(--blue);color:#fff}
.section--blue .eyebrow{color:#9fc2e6}
.section--blue .lead{color:rgba(255,255,255,.94)}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--blue-2);margin-bottom:16px}
h1,h2,h3{line-height:1.1;font-weight:900;letter-spacing:-.01em}
h1{font-size:clamp(34px,5.4vw,58px)}
h2{font-size:clamp(27px,3.6vw,40px)}
h3{font-size:21px;font-weight:700;letter-spacing:0}
.lead{font-size:clamp(18px,2.2vw,22px);font-weight:300;line-height:1.5;color:#33424f}
p+p{margin-top:14px}
.muted{color:var(--muted)}
.center{text-align:center}
.measure{max-width:60ch}
.measure-narrow{max-width:46ch}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:15px;
  padding:14px 26px;border-radius:6px;border:2px solid transparent;cursor:pointer;transition:.2s}
.btn--primary{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn--primary:hover{background:#0a447c;border-color:#0a447c;color:#fff}
.btn--ghost{background:transparent;color:var(--blue);border-color:var(--blue)}
.btn--ghost:hover{background:var(--blue);color:#fff}
.btn--light{background:#fff;color:var(--blue);border-color:#fff}
.btn--light:hover{background:transparent;color:#fff;border-color:#fff}
.btn--ondark{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn--ondark:hover{background:#fff;color:var(--blue);border-color:#fff}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.6);
  -webkit-backdrop-filter:blur(18px) saturate(160%);backdrop-filter:blur(18px) saturate(160%);
  box-shadow:0 2px 2px rgba(11,27,43,.10)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:96px;
  max-width:none;padding-inline:clamp(20px,4vw,45px)}
.brand img{height:64px;width:auto}
.nav{display:flex;align-items:center;gap:34px}
.nav a{color:var(--ink);font-weight:500;font-size:15px}
.nav a:hover,.nav a.active{color:var(--blue)}
.nav .btn{padding:11px 22px}
.nav a.btn--primary,.nav a.btn--primary:hover{color:#fff}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:28px;height:22px;position:relative}
.nav-toggle span{position:absolute;left:0;right:0;height:2px;background:var(--ink);transition:.25s}
.nav-toggle span:nth-child(1){top:0}
.nav-toggle span:nth-child(2){top:10px}
.nav-toggle span:nth-child(3){top:20px}

/* hero */
.hero{position:relative;min-height:clamp(520px,82vh,760px);display:flex;align-items:center;color:#fff}
.hero__bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}
.hero__overlay{position:absolute;inset:0;z-index:1;
  background:linear-gradient(90deg,rgba(6,28,52,.86) 0%,rgba(7,33,61,.62) 42%,rgba(9,55,110,.18) 100%)}
.hero .wrap{position:relative;z-index:2;width:100%}
.hero h1{color:#fff;max-width:15ch}
.hero .lead{color:rgba(255,255,255,.92);max-width:46ch;margin-top:22px}
.hero .actions{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.hero--inner{min-height:clamp(360px,52vh,520px)}
.hero--inner h1{max-width:20ch}

/* generic page intro band */
.pagehero{position:relative;color:#fff;display:flex;align-items:flex-end}
.pagehero__bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}
.pagehero__overlay{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(7,33,61,.45),rgba(7,33,61,.82))}
.pagehero .wrap{position:relative;z-index:2;padding-block:56px;width:100%}
.pagehero h1{color:#fff}

/* split / feature rows */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.split--rev .split__media{order:2}
.split__media img{width:100%;height:100%;max-height:440px;object-fit:cover;border-radius:10px}
.kicker-rule{width:46px;height:3px;background:var(--red);margin-bottom:22px;border-radius:2px}

/* pillars / cards */
.grid{display:grid;gap:26px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.card__media{aspect-ratio:16/10;overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .card__media img{transform:scale(1.04)}
.card__body{padding:26px 26px 30px}
.card__body h3{margin-bottom:10px}
.card__body p{color:var(--muted);font-size:16px}

/* values */
.value{padding:28px 26px;background:var(--lblue);border:1px solid rgba(9,78,142,.16);border-radius:12px;border-top:3px solid var(--blue)}
.value h3{color:#08305c;margin-bottom:8px}
.value p{color:var(--ink);font-size:16px}

/* closing band */
.band{background:var(--blue);color:#fff;text-align:center}
.band h2{color:#fff;max-width:18ch;margin:0 auto}
.band p{color:rgba(255,255,255,.85);max-width:52ch;margin:18px auto 0}
.band .actions{margin-top:32px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* footer */
.site-footer{background:var(--ink);color:rgba(255,255,255,.74);padding:64px 0 30px;font-size:15px}
.site-footer a{color:rgba(255,255,255,.74)}
.site-footer a:hover{color:#fff}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-logo{height:48px;width:auto;filter:brightness(0) invert(1);margin-bottom:18px}
.footer-col h4{color:#fff;font-size:13px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px;font-weight:700}
.footer-col p,.footer-col a{display:block;margin-bottom:8px;line-height:1.5}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:13px;color:rgba(255,255,255,.5)}

/* hero clip-reveal animation (title + lead rise from baseline) */
.mask{display:block;overflow:hidden;padding-bottom:.12em;margin-bottom:-.12em}
.mask>span{display:block;transform:translateY(115%);animation:riseUp 1.05s cubic-bezier(.22,.61,.36,1) forwards}
@keyframes riseUp{to{transform:translateY(0)}}
.fade-up{opacity:0;animation:fadeUp .9s ease forwards}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  .mask>span{transform:none;animation:none}
  .fade-up{opacity:1;animation:none}
}

/* brand watermark (logo icon behind coloured sections) */
.has-mark{position:relative;overflow:hidden}
.has-mark>.wrap{position:relative;z-index:1}
.brandmark{position:absolute;pointer-events:none;user-select:none;z-index:0;line-height:0}
.brandmark img{height:100%;width:auto;display:block}
.brandmark--band{right:-2%;top:50%;transform:translateY(-50%);height:165%;opacity:.22}
.brandmark--band img{filter:brightness(0) invert(1)}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* responsive */
@media(max-width:860px){
  .site-header .wrap{height:76px}
  .brand img{height:48px}
  .nav{position:fixed;inset:76px 0 auto 0;flex-direction:column;gap:0;background:#fff;
    border-bottom:1px solid var(--line);padding:8px 0;transform:translateY(-130%);transition:transform .3s;align-items:stretch}
  .nav.open{transform:none}
  .nav a{padding:14px var(--pad)}
  .nav .btn{margin:10px var(--pad);justify-content:center}
  .nav-toggle{display:block}
  .nav-toggle.open span:nth-child(1){top:10px;transform:rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){top:10px;transform:rotate(-45deg)}
  .split{grid-template-columns:1fr}
  .split--rev .split__media{order:0}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;gap:28px}
}