/* ===========================================================
   EGCSS International — Design System
   Petroleum navy + signal amber. Built for trust & scale.
   =========================================================== */

:root {
  --navy-900: #0a1628;
  --navy-800: #0f2138;
  --navy-700: #16314f;
  --navy-600: #1d3f66;
  --steel-400: #5b7da6;
  --steel-200: #b9c8db;
  --amber-500: #f2a900;
  --amber-400: #ffbe2e;
  --amber-300: #ffd166;
  --ink: #0c1622;
  --paper: #f6f8fb;
  --line: rgba(15, 33, 56, 0.10);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, .display {
  font-family: 'Sora', 'Inter', sans-serif;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

.font-mono-num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

/* ---- Layout helpers ---- */
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--amber-500);
}
.eyebrow::before {
  content: ""; width: 26px; height: 2px; background: var(--amber-500); border-radius: 2px;
}
.eyebrow.center::before { display: none; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; border-radius: 999px;
  font-weight: 600; font-size: 15px; text-decoration: none;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
  cursor: pointer; border: none;
}
.btn-amber { background: var(--amber-500); color: var(--navy-900); box-shadow: 0 10px 30px -8px rgba(242,169,0,.55); }
.btn-amber:hover { transform: translateY(-2px); background: var(--amber-400); box-shadow: 0 16px 40px -10px rgba(242,169,0,.7); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.35); }
.btn-ghost:hover { border-color: var(--amber-400); color: var(--amber-300); transform: translateY(-2px); }
.btn-dark { background: var(--navy-800); color: #fff; }
.btn-dark:hover { background: var(--navy-700); transform: translateY(-2px); }

/* ---- Navbar ---- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  transition: background .35s ease, box-shadow .35s ease, padding .35s ease;
  padding: 18px 0;
}
.nav.scrolled {
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: saturate(160%) blur(14px);
  box-shadow: 0 1px 0 rgba(255,255,255,.06), 0 18px 40px -28px rgba(0,0,0,.7);
  padding: 10px 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav-logo img { height: 42px; width: auto; filter: drop-shadow(0 4px 12px rgba(0,0,0,.4)); }
.nav-logo .brand { color: #fff; font-family: 'Sora'; font-weight: 700; font-size: 19px; line-height: 1; }
.nav-logo .brand span { color: var(--amber-400); }
.nav-logo .sub { color: var(--steel-200); font-size: 10.5px; letter-spacing: .22em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  color: rgba(255,255,255,.82); text-decoration: none; font-size: 14.5px; font-weight: 500;
  position: relative; transition: color .2s;
}
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: var(--amber-400); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0; background: var(--amber-400);
  transition: width .25s ease; border-radius: 2px;
}
.nav-links a:hover::after { width: 100%; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; transition: .3s; }

/* mobile menu */
.mobile-menu {
  position: fixed; inset: 0 0 0 auto; width: min(82vw, 340px); z-index: 70;
  background: var(--navy-900); transform: translateX(100%); transition: transform .4s cubic-bezier(.16,1,.3,1);
  padding: 90px 32px 32px; display: flex; flex-direction: column; gap: 6px;
  box-shadow: -30px 0 60px -20px rgba(0,0,0,.6);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu a { color: #fff; text-decoration: none; font-size: 18px; font-weight: 500; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.mobile-menu a:hover { color: var(--amber-400); }
.menu-overlay { position: fixed; inset: 0; background: rgba(5,12,22,.6); backdrop-filter: blur(2px); z-index: 65; opacity: 0; pointer-events: none; transition: opacity .3s; }
.menu-overlay.open { opacity: 1; pointer-events: auto; }

/* ---- Hero ---- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  color: #fff; overflow: hidden; isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; z-index: -2; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.05); }
.hero-overlay {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(105deg, rgba(8,18,33,.96) 0%, rgba(10,22,40,.86) 38%, rgba(10,22,40,.45) 100%),
    radial-gradient(1200px 600px at 80% 10%, rgba(242,169,0,.16), transparent 60%);
}
.hero h1 { font-size: clamp(38px, 6vw, 76px); font-weight: 700; margin: 18px 0 0; }
.hero h1 .accent { color: var(--amber-400); }
.hero p.lead { font-size: clamp(16px, 1.6vw, 20px); color: var(--steel-200); max-width: 620px; margin: 24px 0 36px; line-height: 1.6; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-marquee {
  position: absolute; bottom: 0; left: 0; right: 0; z-index: 1;
  background: rgba(8,18,33,.72); backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255,255,255,.08); overflow: hidden; padding: 14px 0;
}
.marquee-track { display: inline-flex; gap: 56px; white-space: nowrap; animation: scrollX 38s linear infinite; }
.marquee-track span { color: rgba(255,255,255,.55); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; display: inline-flex; align-items: center; gap: 56px; }
.marquee-track span::after { content: "◆"; color: var(--amber-500); font-size: 8px; }
@keyframes scrollX { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---- Stats ---- */
.stats { background: var(--navy-900); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat { padding: 46px 28px; border-right: 1px solid rgba(255,255,255,.08); text-align: center; }
.stat:last-child { border-right: none; }
.stat .num { font-family: 'Sora'; font-size: clamp(34px, 4vw, 50px); font-weight: 700; color: var(--amber-400); }
.stat .label { color: var(--steel-200); font-size: 13.5px; margin-top: 8px; letter-spacing: .04em; }

/* ---- Sections ---- */
section { scroll-margin-top: 80px; }
.sec { padding: 100px 0; }
.sec-head { max-width: 720px; }
.sec-head.center { margin: 0 auto; text-align: center; }
.sec-head h2 { font-size: clamp(28px, 3.6vw, 44px); font-weight: 700; margin: 14px 0 0; color: var(--ink); }
.sec-head p { color: #56657a; font-size: 17px; line-height: 1.7; margin-top: 18px; }
.muted { color: #56657a; }

/* about */
.about-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.about-media { position: relative; }
.about-media img { width: 100%; border-radius: 18px; display: block; box-shadow: 0 40px 80px -40px rgba(10,22,40,.6); }
.about-badge {
  position: absolute; bottom: -26px; left: -26px; background: var(--navy-900); color: #fff;
  padding: 22px 26px; border-radius: 16px; box-shadow: 0 30px 60px -30px rgba(0,0,0,.5);
  border: 1px solid rgba(255,255,255,.08);
}
.about-badge .big { font-family: 'Sora'; font-size: 30px; font-weight: 700; color: var(--amber-400); }
.about-badge .small { color: var(--steel-200); font-size: 13px; }
.tick-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 14px; }
.tick-list li { display: flex; gap: 12px; align-items: flex-start; color: #33414f; font-size: 15.5px; }
.tick-list svg { flex-shrink: 0; margin-top: 2px; }

/* services */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.svc-card {
  background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 34px 30px;
  transition: transform .35s cubic-bezier(.16,1,.3,1), box-shadow .35s, border-color .35s;
  position: relative; overflow: hidden;
}
.svc-card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 100%; width: 4px; background: var(--amber-500);
  transform: scaleY(0); transform-origin: top; transition: transform .35s ease;
}
.svc-card:hover { transform: translateY(-8px); box-shadow: 0 40px 70px -40px rgba(10,22,40,.45); border-color: transparent; }
.svc-card:hover::before { transform: scaleY(1); }
.svc-icon {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--navy-800), var(--navy-600)); color: var(--amber-400); margin-bottom: 20px;
}
.svc-card h3 { font-size: 19px; margin: 0 0 10px; color: var(--ink); }
.svc-card p { color: #5a6878; font-size: 14.5px; line-height: 1.65; margin: 0; }

/* barite spotlight */
.barite { background: var(--navy-900); color: #fff; position: relative; overflow: hidden; }
.barite::after {
  content: ""; position: absolute; right: -10%; top: -20%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(242,169,0,.18), transparent 65%); z-index: 0;
}
.barite .wrap { position: relative; z-index: 1; }
.barite-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 24px; }
.spec-table td { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.10); font-size: 15px; }
.spec-table td:first-child { color: var(--steel-200); }
.spec-table td:last-child { text-align: right; font-weight: 600; color: #fff; }
.grade-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 8px; }
.grade-card { background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.12); border-radius: 14px; padding: 22px; }
.grade-card .sg { font-family: 'Sora'; font-size: 30px; font-weight: 700; color: var(--amber-400); }
.grade-card .t { font-size: 13px; color: var(--steel-200); margin-top: 4px; }

/* why / values */
.why { background: var(--paper); }
.val-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.val-card { background: #fff; border-radius: 16px; padding: 30px 26px; border: 1px solid var(--line); transition: transform .3s, box-shadow .3s; }
.val-card:hover { transform: translateY(-6px); box-shadow: 0 30px 60px -36px rgba(10,22,40,.4); }
.val-card .vn { font-family: 'Sora'; color: var(--amber-500); font-weight: 700; font-size: 14px; }
.val-card h4 { font-size: 17px; margin: 14px 0 8px; }
.val-card p { color: #5a6878; font-size: 14px; line-height: 1.6; margin: 0; }

/* network / partners */
.net-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.net-card { border: 1px solid var(--line); border-radius: 18px; padding: 32px; background: #fff; transition: .3s; }
.net-card:hover { border-color: var(--amber-400); box-shadow: 0 30px 60px -40px rgba(10,22,40,.4); }
.net-card .tag { font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--amber-500); }
.net-card h4 { font-size: 20px; margin: 10px 0 12px; }
.net-card p { color: #5a6878; font-size: 14.5px; line-height: 1.6; margin: 0; }

/* presence / offices */
.presence { background: var(--navy-900); color: #fff; }
.office-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.office-card { background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.10); border-radius: 16px; padding: 30px; transition: .3s; }
.office-card:hover { background: rgba(255,255,255,.07); transform: translateY(-5px); }
.office-card .flag { font-size: 30px; }
.office-card h4 { font-size: 19px; margin: 12px 0 6px; }
.office-card .role { color: var(--amber-400); font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase; font-weight: 600; }
.office-card p { color: var(--steel-200); font-size: 14px; line-height: 1.6; margin: 12px 0 0; }
.office-card a { color: #fff; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.2); }
.office-card a:hover { color: var(--amber-400); }

/* cta band */
.cta-band { background: linear-gradient(120deg, var(--amber-500), var(--amber-300)); color: var(--navy-900); }
.cta-band h2 { font-size: clamp(28px, 4vw, 46px); font-weight: 700; margin: 0; }
.cta-band p { font-size: 18px; margin: 14px 0 0; opacity: .85; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: #33414f; margin-bottom: 8px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 14px 16px; border: 1.5px solid var(--line); border-radius: 12px;
  font-family: inherit; font-size: 15px; color: var(--ink); background: #fff; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--amber-400); box-shadow: 0 0 0 4px rgba(242,169,0,.14);
}
.contact-info-card { background: var(--navy-900); color: #fff; border-radius: 20px; padding: 40px; }
.contact-info-card .row { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.contact-info-card .row:last-child { border-bottom: none; }
.contact-info-card .ico { width: 42px; height: 42px; border-radius: 11px; background: rgba(242,169,0,.14); color: var(--amber-400); display: grid; place-items: center; flex-shrink: 0; }
.contact-info-card .k { color: var(--steel-200); font-size: 12.5px; letter-spacing: .08em; text-transform: uppercase; }
.contact-info-card .v { font-size: 15.5px; margin-top: 3px; }
.contact-info-card a { color: #fff; text-decoration: none; }
.contact-info-card a:hover { color: var(--amber-400); }

/* footer */
.footer { background: #060e1a; color: var(--steel-200); padding: 70px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.footer h5 { color: #fff; font-size: 14px; letter-spacing: .06em; text-transform: uppercase; margin: 0 0 18px; }
.footer a { color: var(--steel-200); text-decoration: none; font-size: 14.5px; transition: color .2s; }
.footer a:hover { color: var(--amber-400); }
.footer-links { display: grid; gap: 12px; }
.footer-logo img { height: 46px; margin-bottom: 18px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); margin-top: 50px; padding-top: 26px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; }
.cert-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.cert-badge { font-size: 11px; font-weight: 700; letter-spacing: .08em; padding: 6px 12px; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; color: var(--steel-200); }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }

/* products page */
.cat-hero { background: var(--navy-900); color: #fff; padding: 150px 0 70px; position: relative; overflow: hidden; }
.cat-hero::after { content: ""; position: absolute; right: -8%; top: -30%; width: 520px; height: 520px; background: radial-gradient(circle, rgba(242,169,0,.16), transparent 65%); }
.catalog-toolbar { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; margin: 0 0 28px; }
.search-box { flex: 1; min-width: 260px; position: relative; }
.search-box input { width: 100%; padding: 15px 16px 15px 48px; border: 1.5px solid var(--line); border-radius: 12px; font-size: 15px; font-family: inherit; }
.search-box input:focus { outline: none; border-color: var(--amber-400); box-shadow: 0 0 0 4px rgba(242,169,0,.14); }
.search-box svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: #8a98a8; }
.filter-pills { display: flex; gap: 8px; flex-wrap: wrap; }
.pill { padding: 9px 16px; border-radius: 999px; border: 1.5px solid var(--line); background: #fff; font-size: 13.5px; font-weight: 600; color: #46566a; cursor: pointer; transition: .2s; }
.pill:hover { border-color: var(--steel-400); }
.pill.active { background: var(--navy-900); color: #fff; border-color: var(--navy-900); }
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.prod-card { border: 1px solid var(--line); border-radius: 14px; padding: 22px; background: #fff; transition: .25s; }
.prod-card:hover { transform: translateY(-4px); box-shadow: 0 24px 50px -34px rgba(10,22,40,.4); border-color: transparent; }
.prod-card .pcat { font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--amber-500); }
.prod-card h4 { font-size: 16px; margin: 8px 0 0; color: var(--ink); }
.prod-card .pletter { float: right; font-family: 'Sora'; font-weight: 700; color: var(--steel-200); font-size: 18px; }
.count-note { color: #6a7888; font-size: 14px; margin-bottom: 20px; }
.no-results { text-align: center; padding: 60px 0; color: #6a7888; grid-column: 1 / -1; }

/* responsive */
@media (max-width: 980px) {
  .about-grid, .barite-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: none; }
  .stat { border-bottom: 1px solid rgba(255,255,255,.08); }
  .svc-grid, .net-grid, .office-grid, .val-grid, .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .val-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .about-media { order: -1; }
}
@media (max-width: 680px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .sec { padding: 70px 0; }
  .svc-grid, .net-grid, .office-grid, .val-grid, .prod-grid, .grade-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: 92vh; }
  .about-badge { left: 12px; bottom: -18px; }
}