/* NEURAL GOLD AUTHORITY - Global Stylesheet */

:root {
  --bg-primary: #0A0A0A;
  --bg-secondary: #121212;
  --bg-shadow: #050505;
  --gold-primary: #C6A85A;
  --gold-highlight: #E6C77A;
  --gold-muted: #8A742F;
  --gold-glow: rgba(198, 168, 90, 0.35);
  --gold-subtle: rgba(198, 168, 90, 0.15);
  
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 700ms;
  --transition-base: 500ms;
  --transition-fast: 400ms;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-primary);
  color: #E5E5E5;
  line-height: 1.6;
  font-size: 18px;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: 'Playfair Display', serif;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(3.5rem, 8vw, 6.875rem);
  line-height: 1.05;
}

h2 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

/* Gold Mesh Canvas */
#gold-mesh-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.4;
  pointer-events: none;
}

/* Navigation */
.nav-glass {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(0px);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-base) var(--ease-out-expo);
  padding: 1.5rem 0;
}

.nav-glass.scrolled {
  backdrop-filter: blur(20px);
  background: rgba(10, 10, 10, 0.85);
  border-bottom: 1px solid var(--gold-subtle);
  padding: 1rem 0;
}

.nav-link {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #888;
  transition: color var(--transition-fast) var(--ease-out-expo);
  position: relative;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--gold-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold-primary);
  transition: width var(--transition-base) var(--ease-out-expo);
}

.nav-link:hover::after {
  width: 100%;
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--gold-muted) 0%, var(--gold-primary) 50%, var(--gold-highlight) 100%);
  color: var(--bg-primary);
  padding: 1rem 2.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base) var(--ease-out-expo);
  box-shadow: 0 0 0 rgba(198, 168, 90, 0);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px var(--gold-glow), 0 0 20px var(--gold-subtle);
}

.btn-secondary {
  background: transparent;
  color: var(--gold-primary);
  padding: 1rem 2.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--gold-muted);
  cursor: pointer;
  transition: all var(--transition-base) var(--ease-out-expo);
}

.btn-secondary:hover {
  border-color: var(--gold-primary);
  background: rgba(198, 168, 90, 0.05);
  box-shadow: 0 0 30px var(--gold-subtle);
}

/* Glass Panels */
.glass-panel {
  background: rgba(18, 18, 18, 0.6);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(198, 168, 90, 0.1);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transition: all var(--transition-base) var(--ease-out-expo);
}

.glass-panel:hover {
  border-color: rgba(198, 168, 90, 0.3);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 40px var(--gold-subtle);
}

/* Gold Dividers */
.gold-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--gold-muted) 50%, transparent 100%);
  width: 100%;
  max-width: 200px;
  margin: 0 auto;
}

.gold-divider-full {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--gold-muted) 20%, var(--gold-primary) 50%, var(--gold-muted) 80%, transparent 100%);
  width: 100%;
  opacity: 0.3;
}

/* Form Elements */
.form-input {
  background: rgba(18, 18, 18, 0.4);
  border: 1px solid rgba(198, 168, 90, 0.2);
  color: #E5E5E5;
  padding: 1rem 1.25rem;
  width: 100%;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  transition: all var(--transition-base) var(--ease-out-expo);
  outline: none;
}

.form-input:focus {
  border-color: var(--gold-primary);
  box-shadow: 0 0 20px var(--gold-subtle);
  background: rgba(18, 18, 18, 0.6);
}

.form-input::placeholder {
  color: #555;
}

/* Scroll Reveal Animation */
.reveal-element {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 600ms var(--ease-out-expo), transform 600ms var(--ease-out-expo);
}

.reveal-element.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-element { opacity: 1; transform: none; }
.js .reveal-element { opacity: 0; transform: translateY(16px); }
.js .reveal-element.is-visible { opacity: 1; transform: none; }

/* Utility Classes */
.text-gold { color: var(--gold-primary); }
.text-gold-muted { color: var(--gold-muted); }
.bg-dark { background-color: var(--bg-secondary); }
.bg-darker { background-color: var(--bg-shadow); }

/* Parallax Containers */
.parallax-slow {
  will-change: transform;
}

/* Case Study Hover */
.case-study-card {
  position: relative;
  overflow: hidden;
}

.case-study-card img {
  transition: transform 700ms var(--ease-out-expo);
}

.case-study-card:hover img {
  transform: scale(1.05);
}

.case-study-overlay {
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  transition: border-color 500ms var(--ease-out-expo);
  pointer-events: none;
}

.case-study-card:hover .case-study-overlay {
  border-color: var(--gold-primary);
  box-shadow: inset 0 0 60px rgba(0,0,0,0.8);
}

/* Radial Glow */
.radial-gold-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--gold-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.5;
  filter: blur(60px);
}

/* Responsive */
@media (max-width: 768px) {
  body { font-size: 16px; }
  .nav-glass { padding: 1rem 0; }
  .gold-divider { max-width: 120px; }
}

html, body {
  width: 100%;
  overflow-x: hidden;
}

#gold-mesh-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
}