/* PetroLuc — Premium B2B SaaS design system (2025)
   Rules:
   - 1 brand, 1 neutral dark, 1 neutral light, 1 accent (sparingly)
   - One font family (Inter)
   - 8pt grid, min 16px separation
   - WCAG AA-friendly contrast
   - Calm depth, no gimmicks
*/

:root{
  --brand: #0EA5E9; /* primary brand */
  --accent: #1D4ED8; /* sparingly */
  --dark: #0B1220;   /* neutral dark */
  --light: #F8FAFC;  /* neutral light */

  --radius: 14px;
  --radius-lg: 18px;

  --container: 1120px;
  --pad: clamp(16px, 3vw, 32px);

  --ease: cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--light);
  color: var(--dark);
  line-height: 1.5;
}

a{color:inherit; text-decoration:none}
img{max-width:100%; display:block}

.skip-link{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:16px;top:16px;width:auto;height:auto;padding:10px 14px;background:var(--light);border:1px solid rgba(11,18,32,.18);border-radius:12px;z-index:9999}

.container{max-width:var(--container);margin:0 auto;padding:0 var(--pad)}
.section{padding:96px 0}
.section--alt{background:rgba(11,18,32,.03);border-top:1px solid rgba(11,18,32,.10);border-bottom:1px solid rgba(11,18,32,.10)}

.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid rgba(11,18,32,.10)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px var(--pad);max-width:calc(var(--container) + (var(--pad)*2));margin:0 auto;gap:16px}
.brand{display:flex;align-items:center;gap:16px}
.brand__logo{height:44px;width:auto}

.nav__toggle{display:none;background:transparent;border:1px solid rgba(11,18,32,.14);border-radius:12px;width:44px;height:44px;cursor:pointer;transition:background 160ms var(--ease),border-color 160ms var(--ease)}
.nav__toggle:focus-visible{outline:2px solid rgba(14,165,233,.45);outline-offset:2px}
.nav__toggle:hover{background:rgba(11,18,32,.04);border-color:rgba(11,18,32,.18)}
.nav__toggleLines{position:relative;display:block;width:18px;height:2px;background:var(--dark);margin:0 auto}
.nav__toggleLines::before,.nav__toggleLines::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--dark);transition:transform 200ms var(--ease),top 200ms var(--ease),opacity 200ms var(--ease)}
.nav__toggleLines::before{top:-6px}
.nav__toggleLines::after{top:6px}
.nav__toggle[aria-expanded="true"] .nav__toggleLines{background:transparent}
.nav__toggle[aria-expanded="true"] .nav__toggleLines::before{top:0;transform:rotate(45deg)}
.nav__toggle[aria-expanded="true"] .nav__toggleLines::after{top:0;transform:rotate(-45deg)}

.nav__links{display:flex;align-items:center;gap:16px}
.nav__link{padding:8px 10px;border-radius:12px;color:rgba(11,18,32,.74);transition:background 160ms var(--ease),color 160ms var(--ease)}
.nav__link:hover{background:rgba(11,18,32,.04);color:rgba(11,18,32,.92)}
.nav__link:focus-visible{outline:2px solid rgba(14,165,233,.45);outline-offset:2px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 16px;border-radius:var(--radius);border:1px solid rgba(11,18,32,.14);background:transparent;color:rgba(11,18,32,.92);cursor:pointer;transition:background 160ms var(--ease),border-color 160ms var(--ease)}
.btn--sm{padding:10px 14px}
.btn--lg{padding:14px 18px;border-radius:var(--radius-lg)}
.btn--full{width:100%}
.btn:hover{background:rgba(11,18,32,.04);border-color:rgba(11,18,32,.18)}
.btn:focus-visible{outline:2px solid rgba(14,165,233,.45);outline-offset:2px}
.btn--primary{background:var(--dark);color:var(--light);border-color:var(--dark)}
.btn--primary:hover{background:rgba(11,18,32,.92)}
.btn__icon{display:inline-flex;opacity:.9}

.hero{position:relative;padding:88px 0 72px;background:var(--light)}
.hero__bg{position:absolute;inset:0;background:radial-gradient(900px 400px at 20% 10%, rgba(14,165,233,.10), transparent 55%),radial-gradient(900px 400px at 80% 20%, rgba(29,78,216,.08), transparent 55%)}
.hero__content{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:start}

.eyebrow{margin:0 0 16px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:rgba(11,18,32,.62)}
.hero__title{margin:0;font-size:clamp(34px,4vw,54px);line-height:1.08;letter-spacing:-0.01em}
.hero__titleAccent{display:block;margin-top:10px;font-size:clamp(16px,1.3vw,20px);line-height:1.4;color:rgba(11,18,32,.78)}
.hero__lead{margin:16px 0 24px;max-width:62ch;font-size:16px;color:rgba(11,18,32,.74)}
.hero__actions{display:flex;flex-wrap:wrap;gap:16px}

.surface{background:rgba(255,255,255,.72);border:1px solid rgba(11,18,32,.12);border-radius:18px}
.panel{padding:20px}
.panel__title{margin:0 0 12px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:rgba(11,18,32,.62)}
.panel__row{display:grid;grid-template-columns:96px 1fr;gap:16px;padding:12px 0;border-top:1px solid rgba(11,18,32,.10)}
.panel__k{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:rgba(11,18,32,.56)}
.panel__v{margin:0;color:rgba(11,18,32,.92)}
.link{color:var(--accent)}
.link:hover{color:var(--accent)}
.hero__panel .btn{margin-top:16px}

.hero__stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:32px}
.stat{padding:16px;border-radius:16px;border:1px solid rgba(11,18,32,.10);background:rgba(255,255,255,.72);display:flex;gap:12px;align-items:flex-start}
.stat__icon{color:rgba(11,18,32,.70)}
.stat__label{margin:0;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:rgba(11,18,32,.56)}
.stat__value{margin:6px 0 0;font-weight:600}

.section__head{max-width:76ch;margin-bottom:32px}
.section__title{margin:0 0 12px;font-size:clamp(26px,2.2vw,34px);line-height:1.2;letter-spacing:-0.01em}
.section__lead{margin:0;color:rgba(11,18,32,.72);font-size:16px}

.grid{display:grid;gap:16px}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}

.card,.machine{padding:20px;border-radius:18px;border:1px solid rgba(11,18,32,.10);background:rgba(255,255,255,.72);transition:border-color 160ms var(--ease),background 160ms var(--ease);height:100%}
.card:hover,.machine:hover{border-color:rgba(11,18,32,.16);background:rgba(255,255,255,.84)}
.card:focus-visible,.machine:focus-visible{outline:2px solid rgba(14,165,233,.45);outline-offset:3px}
.card__icon{width:36px;height:36px;border-radius:12px;border:1px solid rgba(11,18,32,.10);display:grid;place-items:center;color:rgba(11,18,32,.72);background:rgba(255,255,255,.72)}
.card__title{margin:16px 0 8px;font-size:16px;line-height:1.3}
.card__text{margin:0;color:rgba(11,18,32,.72);font-size:15px}
.card__meta{margin:12px 0 0;color:rgba(11,18,32,.56);font-size:13px}

.machine__top{display:flex;align-items:center;justify-content:space-between;gap:16px}
.machine__title{margin:0;font-size:16px}
.machine__text{margin:12px 0 12px;color:rgba(11,18,32,.72);font-size:15px}
.machine__list{margin:0;padding-left:18px;color:rgba(11,18,32,.72)}
.machine__list li{padding:4px 0}
.chip{padding:8px 10px;border-radius:999px;border:1px solid rgba(11,18,32,.12);background:rgba(255,255,255,.72);color:rgba(11,18,32,.70);font-size:12px;letter-spacing:.10em;text-transform:uppercase}
.link--row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:16px}

.split{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start}
.pillRow{display:flex;flex-wrap:wrap;gap:16px;margin-top:24px}
.pill{padding:10px 12px;border-radius:999px;border:1px solid rgba(11,18,32,.12);background:rgba(255,255,255,.72);color:rgba(11,18,32,.72);font-size:12px;letter-spacing:.10em;text-transform:uppercase}

.quote{padding:20px}
.quote__title{margin:0 0 12px;font-size:16px}
.quote__list{margin:0 0 16px;padding-left:18px;color:rgba(11,18,32,.72)}
.quote__list li{padding:6px 0}

.contact{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
.form{padding:20px}
.form__row{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:rgba(11,18,32,.56)}
.input{padding:12px 12px;border-radius:12px;border:1px solid rgba(11,18,32,.14);background:rgba(255,255,255,.92);color:rgba(11,18,32,.92);outline:none;transition:border-color 160ms var(--ease),background 160ms var(--ease)}
.input::placeholder{color:rgba(11,18,32,.44)}
.input:focus{border-color:rgba(14,165,233,.45);background:#fff}
.input--area{resize:vertical;min-height:140px}
.form__note{margin:10px 0 0;color:rgba(11,18,32,.62);font-size:13px}

.contactCard{padding:20px}
.contactCard__title{margin:0 0 12px;font-size:16px}
.contactCard__row{display:grid;grid-template-columns:78px 1fr;gap:16px;padding:12px 0;border-top:1px solid rgba(11,18,32,.10)}
.contactCard__k{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:rgba(11,18,32,.56)}
.contactCard__v{margin:0}
.contactCard__text{margin:8px 0 0;color:rgba(11,18,32,.72)}
.divider{height:1px;background:rgba(11,18,32,.10);margin:16px 0}

.footer{padding:32px 0 44px;border-top:1px solid rgba(11,18,32,.10);background:#fff}
.footer__inner{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}
.footer__text{margin:12px 0 0;color:rgba(11,18,32,.62);font-size:13px}
.footer__right{display:flex;gap:16px;flex-wrap:wrap}
.footer__link{padding:8px 10px;border-radius:12px;border:1px solid rgba(11,18,32,.10);background:transparent;color:rgba(11,18,32,.74);transition:background 160ms var(--ease),border-color 160ms var(--ease)}
.footer__link:hover{background:rgba(11,18,32,.04);border-color:rgba(11,18,32,.16);color:rgba(11,18,32,.92)}
.footer__link:focus-visible{outline:2px solid rgba(14,165,233,.45);outline-offset:2px}

.reveal{opacity:0;transform:translateY(8px);transition:opacity 360ms var(--ease),transform 360ms var(--ease)}
.reveal.in-view{opacity:1;transform:translateY(0)}

@media (max-width:980px){
  .hero__content{grid-template-columns:1fr;gap:24px}
  .hero__stats{grid-template-columns:1fr}
  .grid--3{grid-template-columns:1fr}
  .grid--2{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr}
  .nav__toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav__links{position:absolute;left:var(--pad);right:var(--pad);top:68px;display:none;flex-direction:column;align-items:stretch;gap:8px;padding:12px;border-radius:16px;background:#fff;border:1px solid rgba(11,18,32,.12)}
  .nav__links.open{display:flex}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .reveal{transition:none;transform:none}
  .btn,.nav__link,.card,.machine,.footer__link,.input,.nav__toggleLines::before,.nav__toggleLines::after{transition:none}
}