:root {
  --green-900: #0e2419;
  --green-800: #14352a;
  --green-700: #1c4a39;
  --gold-500: #c7a25a;
  --gold-300: #e2c98a;
  --ink: #0b1a13;
  --paper: #f6f4ee;
  --paper-2: #ecebe2;
  --muted: #65786c;
  --maxw: 1180px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}
h1, h2, h3, .brand { font-family: Oxanium, Inter, sans-serif; letter-spacing: .02em; }
a { color: var(--gold-500); text-decoration: none; }
a:hover { color: #b89145; }
.nav { background: var(--green-900); border-bottom: 1px solid rgba(226,201,138,.18); position: sticky; top: 0; z-index: 50; }
.nav-inner { max-width: var(--maxw); margin: auto; padding: 16px 24px; display: flex; gap: 22px; align-items: center; justify-content: space-between; }
.brand { color: #f1e4c0; font-weight: 800; letter-spacing: .16em; display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 34px; height: 40px; color: var(--gold-300); flex: 0 0 auto; object-fit: contain; }
.brand-name { font-family: Oxanium, Inter, sans-serif; line-height: 1.02; text-transform: uppercase; display: flex; flex-direction: column; }
.brand-name .brand-sub { color: var(--gold-300); letter-spacing: .2em; }
.nav-links { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.nav-links a { color: #d6e2dc; text-transform: uppercase; font-size: .78rem; font-weight: 700; letter-spacing: .12em; }
.nav-links a:hover { color: var(--gold-300); }
.nav-item { position: relative; }
.submenu {
  position: absolute;
  left: 0;
  top: calc(100% + 12px);
  min-width: 240px;
  background: #102b20;
  border: 1px solid rgba(226,201,138,.18);
  border-radius: 8px;
  padding: 10px;
  box-shadow: 0 22px 40px -28px rgba(0,0,0,.65);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}
.submenu a { display: block; padding: 10px 12px; border-radius: 6px; letter-spacing: .08em; }
.submenu a:hover { background: rgba(226,201,138,.08); }
.has-menu:hover .submenu, .has-menu:focus-within .submenu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-cta { display: inline-flex; background: var(--gold-500); color: var(--green-900); padding: 10px 16px; border-radius: 3px; font-family: Oxanium, Inter, sans-serif; text-transform: uppercase; letter-spacing: .1em; font-weight: 800; font-size: .72rem; }
.burger { display: none; background: none; border: 0; color: var(--gold-300); cursor: pointer; }
@media (max-width: 1120px) {
  .nav-inner { align-items: flex-start; flex-wrap: wrap; }
  .nav-links, .nav-cta { display: none; }
  .burger { display: block; margin-left: auto; }
  .nav.open .nav-links { display: flex; width: 100%; flex-direction: column; align-items: flex-start; gap: 12px; padding-top: 14px; }
  .nav.open .nav-cta { display: inline-flex; }
  .nav-item { width: 100%; }
  .submenu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; min-width: 0; width: 100%; margin-top: 8px; background: rgba(255,255,255,.04); }
}
.hero {
  color: white;
  padding: 110px 24px 86px;
  background: linear-gradient(135deg, rgba(14,36,25,.94), rgba(28,74,57,.82)), var(--hero-image, url('../images/hero-refinery.jpg')) center/cover;
}
.hero-inner, .container { max-width: var(--maxw); margin: auto; }
.eyebrow { text-transform: uppercase; letter-spacing: .24em; color: var(--gold-300); font-weight: 800; font-size: .76rem; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 4.4rem); line-height: 1.05; max-width: 920px; margin: 18px 0; }
.hero p { max-width: 780px; color: #d6e2dc; font-size: 1.08rem; }
.container { padding: 72px 24px; }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); margin: 0 0 12px; color: var(--green-800); }
.section-head p { color: var(--muted); margin: 0; }
.catalog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
@media (max-width: 980px) { .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .catalog-grid { grid-template-columns: 1fr; } }
.catalog-card {
  background: white;
  border: 1px solid rgba(20,53,42,.12);
  border-radius: 8px;
  overflow: hidden;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  box-shadow: 0 18px 42px -34px rgba(0,0,0,.45);
}
.catalog-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; background: #d8d4c8; display: block; }
.catalog-card-body { padding: 22px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.meta { text-transform: uppercase; letter-spacing: .16em; color: var(--muted); font-size: .72rem; font-weight: 800; }
.catalog-card h3 { color: var(--green-800); font-size: 1.22rem; margin: 0; }
.catalog-card p { color: #2e3d33; margin: 0; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.chip { background: var(--paper-2); color: #33443a; border-radius: 999px; padding: 5px 9px; font-size: .76rem; font-weight: 700; }
.button {
  display: inline-flex;
  width: fit-content;
  background: var(--gold-500);
  color: var(--green-900);
  padding: 11px 16px;
  border-radius: 3px;
  font-family: Oxanium, Inter, sans-serif;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 800;
  font-size: .76rem;
}
.button.secondary { background: transparent; color: var(--green-800); border: 1px solid rgba(28,74,57,.25); }
.detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 42px; align-items: start; }
@media (max-width: 900px) { .detail-layout { grid-template-columns: 1fr; } }
.detail-main, .side-panel {
  background: white;
  border: 1px solid rgba(20,53,42,.12);
  border-radius: 8px;
  padding: 30px;
}
.detail-main h2 { color: var(--green-800); font-size: clamp(1.8rem, 3vw, 2.55rem); line-height: 1.12; margin: 0 0 18px; }
.detail-main p { color: #2e3d33; font-size: 1.03rem; }
.hero-media { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 8px; margin-bottom: 26px; background: #d8d4c8; }
.spec-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 20px 0; list-style: none; }
@media (max-width: 560px) { .spec-list { grid-template-columns: 1fr; } }
.spec-list li { background: var(--paper-2); border-left: 3px solid var(--gold-500); padding: 12px 14px; font-weight: 700; color: #26362d; }
.side-panel { position: sticky; top: 86px; }
.side-panel h3 { margin-top: 0; color: var(--green-800); }
.side-panel ul { padding-left: 18px; color: #2e3d33; }
.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 22px; }
.gallery img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 6px; background: #d8d4c8; }
.not-found { background: white; border-radius: 8px; padding: 32px; border: 1px solid rgba(20,53,42,.12); }
.related-section { margin-top: 34px; }
.related-section h3 { color: var(--green-800); font-size: 1.45rem; margin: 0 0 16px; }
.related-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 720px) { .related-grid { grid-template-columns: 1fr; } }
.related-card {
  background: var(--paper);
  border: 1px solid rgba(20,53,42,.1);
  border-radius: 8px;
  padding: 18px;
}
.related-card h4 { color: var(--green-800); font-family: Oxanium, Inter, sans-serif; margin: 0 0 8px; }
.related-card p { margin: 0 0 10px; color: #2e3d33; }
.related-card ul { margin: 0; padding-left: 18px; color: #2e3d33; }
.case-card-mini { overflow: hidden; padding: 0; background: white; }
.case-card-mini img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
.case-card-mini .related-card-body { padding: 18px; }
.case-list-grid .catalog-card-body ul { margin: 0; padding-left: 18px; color: #2e3d33; }
.case-detail-main .hero-media { aspect-ratio: 21/10; }
.case-story-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 28px 0;
}
.case-story-grid section {
  background: var(--paper);
  border: 1px solid rgba(20,53,42,.1);
  border-radius: 8px;
  padding: 18px;
}
.case-story-grid p { margin-bottom: 0; }
@media (max-width: 860px) { .case-story-grid { grid-template-columns: 1fr; } }