/* ============================================================
   shelll.com — PETROLEUM INDUSTRY DARK + AMBER
   Typography: Space Mono (display) + Merriweather (body)
   Palette: Deep petroleum dark + Amber/Orange + Warm grays
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Merriweather:wght@300;400;600;700&display=swap');

:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --card: #161b22;
  --amber: #f59e0b;
  --amber2: #d97706;
  --amber-light: #fbbf24;
  --orange: #ea580c;
  --grey: #8b949e;
  --dark: #0a0f1a;
  --text: #e6edf3;
  --muted: #8b949e;
  --border: rgba(245,158,11,0.18);
  --petroleum-blue: #1e3a5f;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Merriweather', serif !important;
  background: var(--bg) !important;
  color: var(--text) !important;
  background-image:
    radial-gradient(ellipse 70% 50% at 10% 10%, rgba(245,158,11,0.04) 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 90%, rgba(234,88,12,0.03) 0%, transparent 50%) !important;
  overflow-x: hidden !important;
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
  font-family: 'Space Mono', monospace !important;
  font-weight: 700 !important;
}

/* -- OIL DERRICK SILHOUETTE EFFECT -- */
body::before {
  content: '';
  position: fixed;
  top: 0; right: 5%;
  width: 2px;
  height: 100vh;
  background: linear-gradient(180deg, rgba(245,158,11,0.12), transparent);
  pointer-events: none;
  z-index: 0;
}

/* -- TOP ENERGY BAR -- */
.site-top-accent {
  height: 3px;
  background: linear-gradient(90deg, var(--amber), var(--orange), var(--amber2));
}

/* -- NAVBAR -- */
.navbar, .unified-navbar {
  background: var(--dark) !important;
  border-bottom: 2px solid var(--amber) !important;
  padding: 0.9rem 0 !important;
  box-shadow: 0 2px 20px rgba(0,0,0,.4) !important;
}
.navbar-brand, .unified-navbar .navbar-brand {
  font-family: 'Space Mono', monospace !important;
  font-weight: 700 !important;
  font-size: 1.4rem !important;
  color: var(--amber) !important;
  letter-spacing: -0.3px !important;
}
.navbar-brand i { color: var(--amber-light) !important; }
.nav-link, .unified-navbar .nav-link {
  font-family: 'Merriweather', serif !important;
  color: rgba(255,255,255,0.7) !important;
  font-weight: 500 !important;
  font-size: 0.875rem !important;
  transition: all 0.2s !important;
}
.nav-link:hover, .nav-link.active,
.unified-navbar .nav-link:hover,
.unified-navbar .nav-link.active {
  color: var(--amber) !important;
  background: rgba(245,158,11,0.08) !important;
}
.dropdown-menu, .unified-navbar .dropdown-menu {
  background: var(--dark) !important;
  border: 1px solid rgba(245,158,11,0.2) !important;
  border-top: 2px solid var(--amber) !important;
  border-radius: 0 0 8px 8px !important;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5) !important;
}
.dropdown-item { color: rgba(255,255,255,0.65) !important; font-family: 'Merriweather', serif !important; }
.dropdown-item:hover { color: var(--amber) !important; background: rgba(245,158,11,0.08) !important; }
.navbar-toggler { border-color: rgba(245,158,11,0.4) !important; }
.navbar-toggler-icon { filter: brightness(2) !important; }

/* -- HERO -- */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, #0d1117 50%, #1a1a2e 100%) !important;
  position: relative !important;
  overflow: hidden !important;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 30% 50%, rgba(245,158,11,0.1) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 30%, rgba(234,88,12,0.06) 0%, transparent 45%);
  pointer-events: none;
}
.hero h1 {
  font-family: 'Space Mono', monospace !important;
  font-size: clamp(2.2rem, 5vw, 4.5rem) !important;
  font-weight: 700 !important;
  line-height: 1.15 !important;
  letter-spacing: -0.5px !important;
  color: #fff !important;
}
.hero h1 .highlight, .hero h1 span { color: var(--amber) !important; }
.hero p { font-size: 1.05rem !important; line-height: 1.75 !important; color: rgba(255,255,255,0.7) !important; }
.hero-badge {
  background: rgba(245,158,11,0.1) !important;
  border: 1px solid rgba(245,158,11,0.3) !important;
  color: var(--amber) !important;
  font-family: 'Space Mono', monospace !important;
  font-size: 0.72rem !important;
  letter-spacing: 0.12em !important;
  text-transform: uppercase !important;
  border-radius: 4px !important;
  padding: 0.3rem 0.8rem !important;
  display: inline-block !important;
  margin-bottom: 1rem !important;
}

/* -- BUTTONS -- */
button[class*="btn"], a[class*="btn"] {
  font-family: 'Merriweather', serif !important;
  font-weight: 700 !important;
  letter-spacing: 0.02em !important;
  border-radius: 6px !important;
  transition: all 0.25s ease !important;
}
[class*="btn-primary"]:not([class*="outline"]),
.btn-gold, .btn-submit {
  background: linear-gradient(135deg, var(--amber), var(--amber2)) !important;
  border: none !important;
  color: #000 !important;
  box-shadow: 0 4px 20px rgba(245,158,11,0.3) !important;
  padding: 0.75rem 1.8rem !important;
}
[class*="btn-primary"]:not([class*="outline"]):hover,
.btn-gold:hover, .btn-submit:hover {
  background: linear-gradient(135deg, var(--amber2), var(--orange)) !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 30px rgba(245,158,11,0.4) !important;
  color: #000 !important;
}
[class*="btn-outline"] {
  border: 2px solid var(--amber) !important;
  color: var(--amber) !important;
  background: transparent !important;
}
[class*="btn-outline"]:hover { background: var(--amber) !important; color: #000 !important; }

/* -- CARDS -- */
.card, [class*="-card"] {
  background: var(--card) !important;
  border: 1px solid var(--border) !important;
  border-radius: 10px !important;
  box-shadow: 0 2px 16px rgba(0,0,0,0.2) !important;
  transition: all 0.3s ease !important;
}
.card:hover, [class*="-card"]:hover {
  transform: translateY(-4px) !important;
  box-shadow: 0 12px 40px rgba(0,0,0,0.3) !important;
  border-color: rgba(245,158,11,0.35) !important;
}

/* -- SECTION HEADERS -- */
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem) !important; color: var(--amber) !important; letter-spacing: -0.3px !important; }
h2 .highlight, span.highlight { color: var(--amber-light) !important; }
.section-header p, .section-sub { color: var(--muted) !important; }

/* Alt sections */
section:nth-child(even) { background: var(--bg2) !important; }

/* -- PRICE BOARD -- */
.price-board { background: var(--bg2) !important; border: 1px solid var(--border) !important; border-radius: 12px !important; }
.price-item { background: rgba(245,158,11,0.05) !important; border: 1px solid var(--border) !important; border-radius: 8px !important; }
.price-num { color: var(--amber) !important; font-family: 'Space Mono', monospace !important; }
.price-chg.up { color: #ef4444 !important; }
.price-chg.down { color: #22c55e !important; }

/* -- DISCLAIMER BAR -- */
.disclaimer-bar {
  background: rgba(245,158,11,0.08) !important;
  color: var(--amber) !important;
  border-bottom: 1px solid rgba(245,158,11,0.15) !important;
  font-size: 0.8rem !important;
  padding: 0.5rem 0 !important;
  text-align: center !important;
}

/* -- BREADCRUMB -- */
.unified-breadcrumb { background: var(--bg2) !important; border-bottom: 1px solid var(--border) !important; }
.unified-breadcrumb .breadcrumb-item a { color: var(--amber) !important; }
.unified-breadcrumb .breadcrumb-item.active { color: var(--muted) !important; }

/* -- FOOTER -- */
footer, .unified-footer {
  background: var(--dark) !important;
  border-top: 2px solid var(--amber) !important;
  color: rgba(255,255,255,0.6) !important;
}
footer h5, .unified-footer h5 { color: var(--amber) !important; font-family: 'Space Mono', monospace !important; }
footer a, .unified-footer a { color: rgba(255,255,255,0.5) !important; text-decoration: none !important; }
footer a:hover, .unified-footer a:hover { color: var(--amber) !important; }
.footer-bottom, .unified-footer .footer-bottom { border-color: rgba(255,255,255,0.08) !important; color: rgba(255,255,255,0.3) !important; }

/* -- FORMS -- */
.form-control, input, textarea, select {
  background: var(--bg2) !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
  border-radius: 6px !important;
  font-family: 'Merriweather', serif !important;
}
.form-control:focus, input:focus, textarea:focus {
  border-color: var(--amber) !important;
  box-shadow: 0 0 0 3px rgba(245,158,11,0.15) !important;
}

/* -- NEWSLETTER -- */
.newsletter-section, .stay-updated-section {
  background: var(--bg2) !important;
  border: 1px solid var(--border) !important;
}

/* -- ANIMATIONS -- */
@keyframes growIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.card { animation: growIn 0.5s ease both; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--amber); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--amber2); }
::selection { background: var(--amber); color: #000; }

/* -- ARTICLE CONTENT -- */
.article-content {
  font-family: 'Merriweather', serif !important;
  line-height: 1.85 !important;
  font-size: 1.05rem !important;
  color: var(--text) !important;
}
.article-content h2, .article-content h3 { color: var(--amber) !important; margin: 2rem 0 1rem !important; }
.article-content a { color: var(--amber) !important; text-decoration: underline !important; text-underline-offset: 3px !important; }
.article-content blockquote {
  border-left: 3px solid var(--amber) !important;
  padding: 1rem 1.5rem !important;
  margin: 2rem 0 !important;
  background: var(--bg2) !important;
  border-radius: 0 8px 8px 0 !important;
  font-style: italic !important;
  color: var(--muted) !important;
}

/* -- GLOSSARY -- */
.glossary-term { font-family: 'Space Mono', monospace !important; font-weight: 700 !important; color: var(--amber) !important; }
.glossary-definition { color: var(--muted) !important; border-left: 3px solid var(--amber) !important; padding-left: 1rem !important; }

/* -- MOBILE NAV -- */
.mobile-bottom-nav { background: var(--dark) !important; border-top: 1px solid var(--border) !important; }
.mobile-bottom-nav a { color: rgba(255,255,255,.6) !important; }
.mobile-bottom-nav a:hover, .mobile-bottom-nav a.active { color: var(--amber) !important; }

/* -- A11Y -- */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--amber) !important;
  outline-offset: 3px !important;
}

/* Page entrance */
@keyframes pageEnter {
  from { opacity: 0; }
  to   { opacity: 1; }
}
body { animation: pageEnter 0.4s ease both; }

/* Nav panel dark theme */
.nav-panel { background: var(--dark) !important; border-bottom: 1px solid var(--border) !important; }
.nav-panel li a { color: rgba(255,255,255,.7) !important; }
.nav-panel li a:hover { color: var(--amber) !important; background: rgba(245,158,11,.06) !important; }

/* Page header */
.page-header { background: var(--dark) !important; border-bottom: 1px solid var(--border) !important; }
.page-header h1 { color: var(--amber) !important; }

/* Contact card */
.contact-card { background: var(--card) !important; border: 1px solid var(--border) !important; border-radius: 12px !important; padding: 2rem !important; }