/* ============================================================
   Om Minerals & Metals — v2 (April 2026)
   Minimal, editorial, industrial. Shared across all pages.
   ============================================================ */

:root {
  --navy:        #0a1f3d;
  --navy-deep:   #061633;
  --ink:         #11151c;
  --steel:       #b87333;
  --steel-soft:  #d99656;
  --line:        #e6e8ec;
  --line-strong: #cdd2db;
  --paper:       #ffffff;
  --paper-2:     #f7f8fa;
  --paper-3:     #eef0f4;
  --muted:       #5b6472;
  --text:        #1a2332;
  --shadow-sm:   0 1px 2px rgba(10,31,61,.06);
  --shadow-md:   0 8px 24px rgba(10,31,61,.08);
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 10px;
  --container: 1180px;
  --transition: 200ms cubic-bezier(.4,.0,.2,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--paper);
  font-feature-settings: 'ss01', 'cv11';
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--steel); }
button { font-family: inherit; cursor: pointer; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== NAV ===== */
.nav {
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(8px);
  background: rgba(255,255,255,.92);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 72px; gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  color: var(--navy);
}
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand-text { line-height: 1.05; }
.brand-text strong {
  display: block; font-size: 16px; font-weight: 700;
  letter-spacing: -.01em; color: var(--navy);
}
.brand-text span {
  display: block; font-size: 10.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted);
}
.nav-links {
  display: flex; gap: 4px; align-items: center;
  list-style: none; margin: 0; padding: 0;
}
.nav-links a {
  display: block; padding: 8px 14px;
  font-size: 14.5px; font-weight: 500; color: var(--text);
  border-radius: var(--r-sm);
}
.nav-links a:hover { background: var(--paper-2); color: var(--navy); }
.nav-links a.active { color: var(--navy); font-weight: 600; }
.nav-links a.cta {
  background: var(--navy); color: #fff;
  padding: 10px 20px; margin-left: 8px;
  font-weight: 600;
}
.nav-links a.cta:hover { background: var(--steel); color: #fff; }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line-strong);
  width: 40px; height: 40px; border-radius: var(--r-sm);
  flex-direction: column; gap: 4px; align-items: center; justify-content: center;
}
.nav-toggle span {
  display: block; width: 18px; height: 2px; background: var(--navy);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: var(--r-sm); border: 1px solid transparent;
  font-size: 14.5px; font-weight: 600; letter-spacing: .01em;
  transition: all var(--transition);
  cursor: pointer; text-align: center;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--steel); color: #fff; }
.btn-outline {
  background: transparent; color: var(--navy); border-color: var(--line-strong);
}
.btn-outline:hover { border-color: var(--navy); background: var(--paper-2); color: var(--navy); }
.btn-light { background: #fff; color: var(--navy); }
.btn-light:hover { background: var(--steel); color: #fff; }
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-block { width: 100%; }
.btn-arrow::after {
  content: "→"; font-weight: 400;
  transition: transform var(--transition);
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ===== HEADINGS ===== */
h1, h2, h3, h4 {
  font-family: inherit;
  color: var(--navy);
  letter-spacing: -.02em;
  margin: 0 0 .5em;
}
h1 { font-size: clamp(2rem, 4.2vw, 3.4rem); line-height: 1.08; font-weight: 700; }
h2 { font-size: clamp(1.5rem, 2.4vw, 2.1rem); line-height: 1.15; font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; line-height: 1.3; }
h4 { font-size: 0.95rem; font-weight: 600; }
p  { margin: 0 0 1em; color: var(--text); }
.lead { font-size: 1.1rem; color: var(--muted); line-height: 1.65; }

.eyebrow {
  display: inline-block; font-size: 11.5px; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase; color: var(--steel);
  margin-bottom: 14px;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #fff;
  padding: 72px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(184,115,51,.18), transparent 50%),
    radial-gradient(circle at 10% 90%, rgba(184,115,51,.10), transparent 45%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 880px; }
.hero .eyebrow { color: var(--steel-soft); }
.hero h1 { color: #fff; }
.hero h1 em {
  font-style: normal; color: var(--steel-soft);
}
.hero p {
  color: #c5cdda; font-size: 1.05rem; max-width: 640px; margin-bottom: 32px;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-cta .btn-light { background: #fff; color: var(--navy); }
.hero-cta .btn-outline {
  border-color: rgba(255,255,255,.3); color: #fff; background: transparent;
}
.hero-cta .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.08); color: #fff; }

.hero-meta {
  margin-top: 48px; padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,.12);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.hero-meta div strong {
  display: block; font-size: 1.5rem; font-weight: 700; color: #fff;
  letter-spacing: -.01em; line-height: 1;
}
.hero-meta div span {
  display: block; margin-top: 6px; font-size: 12px;
  color: #98a3b5; letter-spacing: .04em; text-transform: uppercase;
}

/* ===== SECTIONS ===== */
section { padding: 72px 0; }
.section-narrow { max-width: 760px; margin: 0 auto; text-align: center; }
.section-head { margin-bottom: 48px; max-width: 720px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 em { font-style: normal; color: var(--steel); }
.section-head p { color: var(--muted); margin: 0; }

/* ===== CATEGORY GRID ===== */
.cat-grid {
  display: grid; gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  grid-template-columns: repeat(3, 1fr);
}
.cat-tile {
  background: #fff;
  padding: 32px 28px;
  display: flex; flex-direction: column;
  min-height: 200px;
  transition: background var(--transition);
  position: relative;
}
.cat-tile:hover { background: var(--paper-2); }
.cat-tile::after {
  content: "→"; position: absolute; top: 28px; right: 28px;
  color: var(--line-strong); font-size: 18px;
  transition: all var(--transition);
}
.cat-tile:hover::after { color: var(--steel); transform: translateX(4px); }
.cat-tile .num {
  font-size: 11px; font-weight: 600; letter-spacing: .14em;
  color: var(--muted); text-transform: uppercase; margin-bottom: 12px;
}
.cat-tile h3 {
  font-size: 1.25rem; margin-bottom: 8px; color: var(--navy);
}
.cat-tile p {
  font-size: 14px; color: var(--muted); margin: 0; line-height: 1.55;
}

/* ===== FEATURE / WHY ===== */
.feature-row {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px;
  align-items: start;
}
.feature-list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column;
}
.feature-list li {
  display: grid; grid-template-columns: auto 1fr; gap: 18px;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list .num {
  font-size: 13px; font-weight: 700; color: var(--steel);
  letter-spacing: .06em;
}
.feature-list strong {
  display: block; color: var(--navy); font-size: 15px; margin-bottom: 4px;
  font-weight: 600;
}
.feature-list span { color: var(--muted); font-size: 14px; line-height: 1.55; }

/* ===== CERT BAR ===== */
.cert-bar {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 32px 0;
}
.cert-bar-inner {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  align-items: center;
}
.cert-item {
  display: flex; align-items: center; gap: 14px;
  padding-right: 24px; border-right: 1px solid var(--line);
}
.cert-item:last-child { border-right: none; }
.cert-item .badge {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--navy); color: #fff;
  display: grid; place-items: center;
  font-size: 11px; font-weight: 700; letter-spacing: .04em;
  flex-shrink: 0;
}
.cert-item strong {
  display: block; font-size: 14px; color: var(--navy); font-weight: 600;
}
.cert-item span { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }

/* ===== CTA STRIP ===== */
.cta-strip {
  background: var(--navy);
  color: #fff;
  padding: 56px 0;
}
.cta-strip-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; flex-wrap: wrap;
}
.cta-strip h2 { color: #fff; margin: 0 0 6px; font-size: 1.6rem; }
.cta-strip p { color: #c5cdda; margin: 0; }

/* ===== CATEGORY PAGE ===== */
.page-header {
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
  padding: 48px 0;
}
.crumbs {
  font-size: 12.5px; color: var(--muted); margin-bottom: 14px;
  letter-spacing: .04em;
}
.crumbs a:hover { color: var(--steel); }
.crumbs span { color: var(--line-strong); margin: 0 8px; }
.page-header h1 {
  font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 12px;
}
.page-header p { color: var(--muted); max-width: 680px; margin: 0; font-size: 1.02rem; }

.product-table {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--r-md);
  overflow: hidden;
}
.product-row {
  background: #fff; padding: 18px 22px;
  display: flex; align-items: flex-start; gap: 12px;
}
.product-row::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--steel); margin-top: 9px; flex-shrink: 0;
}
.product-row strong { color: var(--navy); font-weight: 600; font-size: 15px; }
.product-row span { color: var(--muted); font-size: 13px; display: block; margin-top: 2px; }

.spec-note {
  margin-top: 32px; padding: 20px 24px;
  background: var(--paper-2); border-left: 3px solid var(--steel);
  border-radius: var(--r-sm);
  font-size: 14px; color: var(--muted);
}
.spec-note strong { color: var(--navy); }

.related {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--line);
}
.related h3 { color: var(--navy); margin-bottom: 20px; }
.related-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.related-grid a {
  padding: 16px 20px; border: 1px solid var(--line);
  border-radius: var(--r-sm); display: flex; align-items: center; justify-content: space-between;
  font-weight: 500; color: var(--navy); font-size: 14.5px;
  transition: all var(--transition);
}
.related-grid a:hover {
  border-color: var(--navy); background: var(--paper-2);
}
.related-grid a::after { content: "→"; color: var(--steel); }

/* ===== ABOUT ===== */
.about-grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px;
  align-items: start;
}
.fact-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 28px;
}
.fact-card h4 {
  font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 8px;
}
.fact-card p {
  font-size: 15px; color: var(--navy); margin: 0; font-weight: 500;
  line-height: 1.5;
}
.fact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px;
}

/* ===== CONTACT ===== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px;
}
.contact-block { margin-bottom: 32px; }
.contact-block h4 {
  font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--steel); margin: 0 0 10px;
}
.contact-block p, .contact-block a {
  font-size: 15px; color: var(--navy); line-height: 1.55;
}
.contact-block a:hover { color: var(--steel); }

.address-card {
  padding: 22px; background: var(--paper-2);
  border: 1px solid var(--line); border-radius: var(--r-md);
  margin-bottom: 14px;
}
.address-card h4 { color: var(--navy); margin: 0 0 6px; font-size: 14px; letter-spacing: 0; text-transform: none; }
.address-card p { color: var(--muted); margin: 0; font-size: 14px; }

.form-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-md); padding: 32px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block; font-size: 12.5px; font-weight: 600;
  color: var(--navy); margin-bottom: 6px; letter-spacing: .02em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 11px 14px;
  border: 1px solid var(--line-strong); border-radius: var(--r-sm);
  font-family: inherit; font-size: 14.5px; color: var(--text);
  background: #fff; transition: all var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none; border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(10,31,61,.08);
}

/* ===== SERVICES PAGE ===== */
.svc-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  border-radius: var(--r-md); overflow: hidden;
}
.svc-card { background: #fff; padding: 28px; }
.svc-card .ix {
  width: 36px; height: 36px; border-radius: var(--r-sm);
  background: var(--paper-2); color: var(--navy);
  display: grid; place-items: center; margin-bottom: 16px;
  border: 1px solid var(--line);
  font-weight: 700; font-size: 13px;
}
.svc-card h3 { color: var(--navy); margin-bottom: 8px; }
.svc-card p { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.svc-card ul {
  list-style: none; padding: 0; margin: 0;
  font-size: 13px; color: var(--text);
}
.svc-card ul li {
  padding: 4px 0; padding-left: 16px; position: relative;
}
.svc-card ul li::before {
  content: "·"; position: absolute; left: 4px; color: var(--steel);
  font-weight: 700;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--navy-deep); color: #c5cdda;
  padding: 56px 0 24px;
  font-size: 14px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px;
  padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand img { width: 52px; margin-bottom: 14px; filter: brightness(1.05); }
.footer-brand p { color: #98a3b5; font-size: 13.5px; line-height: 1.6; margin-bottom: 14px; }
.footer-meta {
  font-size: 12px; color: #6b768a;
  letter-spacing: .03em;
}
.footer h4 {
  color: #fff; font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase; margin: 0 0 16px;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer ul li { margin-bottom: 8px; }
.footer ul a { color: #c5cdda; font-size: 13.5px; }
.footer ul a:hover { color: var(--steel-soft); }
.footer-addr { font-size: 13px; color: #98a3b5; line-height: 1.55; }
.footer-addr strong { color: #fff; display: block; margin-bottom: 4px; font-weight: 600; }
.footer-bottom {
  padding-top: 20px; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  font-size: 12.5px; color: #6b768a;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 960px) {
  .container { padding: 0 20px; }
  .hero { padding: 56px 0 64px; }
  .hero-meta { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-bar-inner { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .cert-item:nth-child(2) { border-right: none; }
  .feature-row { grid-template-columns: 1fr; gap: 40px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .svc-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .nav-inner { min-height: 64px; }
  .product-table { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}

@media (max-width: 700px) {
  body { font-size: 15px; }
  .container { padding: 0 18px; }
  h1 { font-size: clamp(1.6rem, 7vw, 2.2rem); }
  h2 { font-size: clamp(1.3rem, 5vw, 1.7rem); }
  .nav { background: #fff; }
  .nav-inner { min-height: 60px; gap: 12px; position: relative; }
  .brand img { width: 36px; height: 36px; }
  .brand-text strong { font-size: 14.5px; }
  .brand-text span { font-size: 9.5px; letter-spacing: .12em; }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; padding: 12px 18px; gap: 0;
    box-shadow: 0 8px 16px rgba(0,0,0,.06);
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); border-radius: 0; }
  .nav-links a:last-child { border-bottom: none; }
  .nav-links a.cta { margin: 12px 0 8px; text-align: center; padding: 12px; border-radius: var(--r-sm); border-bottom: none; }
  .nav-toggle { display: flex; }
  section { padding: 48px 0; }
  .hero { padding: 44px 0 52px; }
  .hero p { font-size: 1rem; margin-bottom: 24px; }
  .hero-cta { width: 100%; }
  .hero-cta .btn { flex: 1; min-width: 0; }
  .hero-meta { gap: 16px; margin-top: 32px; padding-top: 24px; }
  .hero-meta div strong { font-size: 1.2rem; }
  .hero-meta div span { font-size: 10.5px; }
  .cat-grid { grid-template-columns: 1fr; }
  .cat-tile { padding: 24px 22px; min-height: auto; }
  .cert-bar { padding: 24px 0; }
  .cert-bar-inner { grid-template-columns: 1fr; gap: 14px; }
  .cert-item { border-right: none; padding-right: 0; padding-bottom: 14px; border-bottom: 1px solid var(--line); gap: 12px; }
  .cert-item:last-child { border-bottom: none; padding-bottom: 0; }
  .cert-item .badge { width: 38px; height: 38px; font-size: 10px; }
  .feature-row { gap: 32px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-card { padding: 24px 20px; }
  .footer { padding: 40px 0 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; align-items: flex-start; padding-top: 16px; }
  .cta-strip { padding: 40px 0; }
  .cta-strip-inner { flex-direction: column; align-items: flex-start; gap: 20px; }
  .cta-strip h2 { font-size: 1.3rem; }
  .page-header { padding: 36px 0; }
  .page-header h1 { font-size: clamp(1.5rem, 6vw, 2rem); }
  .product-table { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .fact-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .address-card { padding: 18px; }
  .svc-card { padding: 22px; }
}

@media (max-width: 380px) {
  .container { padding: 0 14px; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  .hero-meta { grid-template-columns: 1fr 1fr; }
  .brand-text span { display: none; }
}