/* ==========================================================================
   Neusig Marketing Website — World-Class Stylesheet
   ==========================================================================
   Design: Stripe sophistication + Palantir gravitas.
   Target: CFOs/CTOs at Fortune 500 Oil & Gas companies.

   Color palette:
     Background:  #060a14 (outer), #0a0e1a → #0d1b2a (gradients)
     Text:        #f0f4f8 (primary), #b0bec5 (secondary), #78909c (muted)
     Accent:      #4dd0e1 (teal/cyan), #00ffff (logo dot cyan)
     Amber:       #ffb74d (Oil & Gas accent)
     Cards:       rgba(255,255,255,0.04) with 10% white borders

   Reference: docs/designs/NEUSIG_INFRASTRUCTURE_AND_WEBSITE_DESIGN.md
   ========================================================================== */

/* ── Reset & Base ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-outer: #060a14;
  --bg-section: #080c18;
  --bg-hero: linear-gradient(180deg, #0a0e1a 0%, #0d1b2a 50%, #0a1628 100%);
  --bg-alt: linear-gradient(180deg, #0b1120 0%, #0d1b2a 100%);
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.065);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-card-hover: rgba(255, 255, 255, 0.18);
  --text-primary: #f0f4f8;
  --text-secondary: #b0bec5;
  --text-muted: #78909c;
  --accent: #4dd0e1;
  --accent-glow: rgba(77, 208, 225, 0.15);
  --accent-amber: #ffb74d;
  --accent-blue: #64b5f6;
  --accent-purple: #ce93d8;
  --accent-red: #ef9a9a;
  --accent-green: #81c784;
  --divider: rgba(255, 255, 255, 0.06);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1100px;
  --radius: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-outer);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.85; }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ── Scroll Reveal Animation ───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Navigation ────────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(6, 10, 20, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--divider);
  transition: background var(--transition);
}
.nav.scrolled { background: rgba(6, 10, 20, 0.95); }

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  height: 100px;
  padding: 0 24px;
  gap: 28px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}
.nav-logo img { height: 140px; width: auto; }
.footer-logo { height: 140px !important; width: auto; }

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  flex: 1;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); opacity: 1; }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

/* Mobile nav */
.mobile-toggle {
  display: none;
  background: none; border: none; cursor: pointer; padding: 8px;
  color: var(--text-secondary);
}
.mobile-toggle span {
  display: block; width: 20px; height: 2px;
  background: currentColor; margin: 4px 0;
  transition: var(--transition);
}

/* ── Buttons ───────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center; justify-content: center;
  padding: 11px 28px;
  border-radius: 7px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
  letter-spacing: 0.01em;
}
.btn-primary {
  background: var(--accent);
  color: #0a0e1a;
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-primary:hover {
  background: #26c6da;
  box-shadow: 0 0 30px rgba(77,208,225,0.25);
  opacity: 1;
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.15);
}
.btn-outline:hover {
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.35);
  opacity: 1;
  transform: translateY(-1px);
}
.btn-signin {
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 16px;
  border: none; cursor: pointer;
}
.btn-signin:hover { color: var(--text-primary); opacity: 1; }
.btn-lg { padding: 14px 36px; font-size: 0.95rem; }

/* ── Hero ──────────────────────────────────────────────────────────────── */
.hero {
  background: var(--bg-hero);
  padding: 160px 24px 120px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -20%; left: -10%; right: -10%; bottom: -20%;
  background:
    radial-gradient(ellipse 600px 400px at 25% 30%, rgba(77,208,225,0.07) 0%, transparent 70%),
    radial-gradient(ellipse 500px 500px at 75% 70%, rgba(100,181,246,0.05) 0%, transparent 70%),
    radial-gradient(ellipse 300px 300px at 50% 50%, rgba(206,147,216,0.03) 0%, transparent 70%);
  animation: heroGlow 12s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes heroGlow {
  0% { opacity: 0.6; transform: scale(1) rotate(0deg); }
  100% { opacity: 1; transform: scale(1.05) rotate(1deg); }
}

.hero-content { position: relative; z-index: 1; max-width: 780px; margin: 0 auto; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid rgba(77,208,225,0.25);
  background: rgba(77,208,225,0.06);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.08;
  margin-bottom: 24px;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #e0f7fa 0%, #4dd0e1 40%, #80cbc4 80%, #b2dfdb 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.hero-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ── Animation Section ─────────────────────────────────────────────────── */
.animation-section {
  background: linear-gradient(180deg, #0a0e1a 0%, #060a14 100%);
  padding: 48px 24px 40px;
  border-bottom: 1px solid var(--divider);
}

/* ── Metrics Strip ─────────────────────────────────────────────────────── */
.metrics {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
  padding: 36px 24px;
}
.metrics-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  text-align: center;
}
.metric-item {
  padding: 8px;
}
.metric-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.02em;
}
.metric-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── Sections ──────────────────────────────────────────────────────────── */
.section { padding: 100px 24px; background: var(--bg-outer); }
.section-alt { background: var(--bg-alt); }

.section-header { margin-bottom: 48px; }
.section-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.7;
}

/* ── Cards ─────────────────────────────────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.cards-grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.card:hover {
  border-color: var(--border-card-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.card:hover::before { opacity: 1; }

.card-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
  font-size: 1.2rem;
  background: var(--accent-glow);
  color: var(--accent);
}
.card-icon.amber { background: rgba(255,183,77,0.12); color: var(--accent-amber); }
.card-icon.blue { background: rgba(100,181,246,0.12); color: var(--accent-blue); }
.card-icon.purple { background: rgba(206,147,216,0.12); color: var(--accent-purple); }
.card-icon.red { background: rgba(239,154,154,0.12); color: var(--accent-red); }
.card-icon.green { background: rgba(129,199,132,0.12); color: var(--accent-green); }

.card-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}
.card-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── Differentiator Cards ──────────────────────────────────────────────── */
.diff-card {
  background: rgba(255, 255, 255, 0.025);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
  border-left: 4px solid var(--accent);
  transition: all var(--transition);
}
.diff-card:hover { background: rgba(255, 255, 255, 0.04); }
.diff-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.diff-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.75; }
.diff-card.blue { border-left-color: var(--accent-blue); }
.diff-card.purple { border-left-color: var(--accent-purple); }
.diff-card.red { border-left-color: var(--accent-red); }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tag {
  font-size: 0.68rem; font-weight: 600;
  padding: 4px 12px; border-radius: 14px;
  border: 1px solid rgba(77, 208, 225, 0.35);
  color: var(--accent);
  transition: all var(--transition);
}
.tag:hover { background: rgba(77,208,225,0.1); border-color: var(--accent); }

/* ── Diagram / Visual Sections ─────────────────────────────────────────── */
.diagram-box {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-card);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 40px;
  position: relative;
}
.diagram-title {
  font-size: 0.72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-muted); margin-bottom: 20px;
}

.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
.flow-node {
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid var(--border-card);
  background: var(--bg-card);
  text-align: center;
  min-width: 100px;
  transition: all var(--transition);
}
.flow-node:hover {
  border-color: var(--accent);
  background: rgba(77,208,225,0.06);
}
.flow-node.highlight {
  border-color: var(--accent);
  background: rgba(77,208,225,0.08);
  color: var(--accent);
}
.flow-arrow {
  color: var(--text-muted);
  font-size: 1.2rem;
  padding: 0 6px;
  user-select: none;
}

/* ── O&G Section ───────────────────────────────────────────────────────── */
.og-section {
  background: rgba(230, 81, 0, 0.04);
  border: 1px solid rgba(255, 152, 0, 0.15);
  border-radius: var(--radius);
  padding: 36px;
  margin-bottom: 24px;
}
.og-title {
  color: var(--accent-amber);
  font-size: 1.3rem; font-weight: 800;
  margin-bottom: 10px; letter-spacing: -0.01em;
}
.og-subtitle { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 20px; line-height: 1.7; }
.og-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.og-item { padding-left: 16px; border-left: 3px solid rgba(255, 152, 0, 0.3); }
.og-item h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 6px; }
.og-item p { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }

/* ── Value Proposition (replaces Pricing) ──────────────────────────────── */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: all var(--transition);
}
.value-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-2px);
}
.value-card .value-icon {
  font-size: 2rem;
  margin-bottom: 14px;
  display: block;
}
.value-card h3 {
  font-size: 1rem; font-weight: 700;
  margin-bottom: 10px;
  color: var(--accent);
}
.value-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── CTA Section ───────────────────────────────────────────────────────── */
.cta-section {
  text-align: center;
  padding: 100px 24px;
  background: var(--bg-alt);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at center, var(--accent-glow), transparent 70%);
  pointer-events: none;
}
.cta-section > * { position: relative; z-index: 1; }
.cta-section h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 800; margin-bottom: 14px;
  background: linear-gradient(135deg, #e0f7fa, #4dd0e1);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cta-section p { color: var(--text-secondary); margin-bottom: 28px; font-size: 1.05rem; }

/* ── Footer ────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--divider);
  padding: 48px 24px 32px;
  background: #04060e;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 32px;
}
.footer-brand p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 12px;
  max-width: 240px;
}
.footer-col h4 {
  font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted); margin-bottom: 14px;
}
.footer-col a {
  display: block; font-size: 0.8rem;
  color: var(--text-secondary); margin-bottom: 8px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--text-primary); opacity: 1; }

.footer-bottom {
  max-width: var(--max-width);
  margin: 28px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--divider);
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.72rem; color: var(--text-muted);
}

/* ── Page-specific: Contact ────────────────────────────────────────────── */
.page-content { padding: 120px 24px 80px; min-height: 100vh; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 0.78rem; font-weight: 600; color: var(--text-secondary); }
.form-group input, .form-group select, .form-group textarea {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-card);
  border-radius: 7px;
  padding: 11px 15px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group select option { background: #0a0e1a; color: var(--text-primary); }
.contact-info h3 { font-size: 1.1rem; font-weight: 700; color: var(--accent); margin-bottom: 14px; }
.contact-info p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
.contact-item { margin-bottom: 14px; }
.contact-item strong { font-size: 0.72rem; color: var(--text-muted); display: block; margin-bottom: 2px; text-transform: uppercase; letter-spacing: 0.04em; }
.contact-item a { font-size: 0.875rem; }

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .cards-grid, .cards-grid-3 { grid-template-columns: 1fr; }
  .og-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100px; left: 0; right: 0;
    background: rgba(6,10,20,0.98);
    padding: 16px 24px; gap: 12px;
    border-bottom: 1px solid var(--divider);
  }
  .metrics-grid { grid-template-columns: repeat(3, 1fr); }
  .hero { padding: 130px 16px 80px; }
  .section { padding: 64px 16px; }
  .flow-diagram { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }
}
@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
}