/* ==========================================================================
   ENGR. VICTOR ASOGWA — LUXURY ENGINEERING PORTFOLIO
   Master Design System & Foundation CSS (Refined & Precision Aligned)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Cinzel:wght@500;600;700;800&family=Oswald:wght@500;600;700;800&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=Syne:wght@700;800&display=swap');

:root {
  /* Core Dark Executive Palette */
  --bg-primary: #020610;
  --bg-secondary: #050e1f;
  --bg-tertiary: #0a1733;
  --bg-card: rgba(6, 17, 38, 0.72);
  --bg-card-hover: rgba(10, 26, 58, 0.9);
  
  /* Luminous Gold Tokens */
  --accent-gold: #dfb743;
  --accent-gold-light: #f7d774;
  --accent-gold-dark: #b88d22;
  --accent-gold-glow: rgba(223, 183, 67, 0.35);
  
  /* Electric Cyber & Technical Blue Tokens */
  --accent-cyan: #00d2ff;
  --accent-blue: #2575fc;
  --accent-blue-light: #38bdf8;
  --accent-blue-glow: rgba(0, 210, 255, 0.25);
  
  /* Typography Colors */
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-heading: #f8fafc;
  
  /* Gradients */
  --gradient-metallic: linear-gradient(180deg, #ffffff 0%, #cbd5e1 35%, #64748b 70%, #1e293b 100%);
  --gradient-metallic-dark: linear-gradient(180deg, #94a3b8 0%, #475569 40%, #1e293b 80%, #0f172a 100%);
  --gradient-blue-text: linear-gradient(180deg, #38bdf8 0%, #0284c7 60%, #0369a1 100%);
  --gradient-gold-btn: linear-gradient(135deg, #dfb743 0%, #b88d22 100%);
  --gradient-gold-btn-hover: linear-gradient(135deg, #f7d774 0%, #dfb743 100%);

  /* Borders & Glassmorphism */
  --border-subtle: rgba(56, 189, 248, 0.14);
  --border-gold: rgba(223, 183, 67, 0.35);
  --border-glass: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(16px);
  
  /* Typography Families */
  --font-serif: 'Cinzel', Georgia, serif;
  --font-display: 'Oswald', 'Bebas Neue', sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  
  /* Layout Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   GLOBAL RESET & OVERFLOW PREVENTION (Zero Horizontal Overflow)
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  background-color: var(--bg-primary);
  font-family: var(--font-body);
  font-size: 16px;
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.no-scroll {
  overflow: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.25);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold);
}

/* Background Atmosphere */
.bg-canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.blueprint-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(56, 189, 248, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(56, 189, 248, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at 50% 40%, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.1) 85%, transparent 100%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.1) 85%, transparent 100%);
}

#particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* Container & Layout */
.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 2.5rem;
  position: relative;
  z-index: 2;
}

@media (max-width: 1024px) {
  .container {
    padding: 0 1.75rem;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 1.25rem;
  }
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.2rem 0;
  transition: background-color var(--transition-normal), backdrop-filter var(--transition-normal), padding var(--transition-normal), border-color var(--transition-normal);
}

.site-header.scrolled {
  background-color: rgba(2, 6, 16, 0.88);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.8rem 0;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand / Monogram */
.brand-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.brand-monogram {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--accent-gold);
  line-height: 1;
  letter-spacing: -2px;
  position: relative;
  display: flex;
  align-items: center;
  text-shadow: 0 0 15px var(--accent-gold-glow);
}

.brand-monogram span {
  color: var(--accent-gold-light);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.15;
}

.brand-title {
  font-family: var(--font-body);
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--accent-blue-light);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* Desktop Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  list-style: none;
}

.nav-item a {
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.5rem 0;
}

.nav-item a:hover {
  color: var(--text-primary);
}

.nav-item a.active {
  color: var(--accent-gold);
}

.nav-item a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-gold);
  box-shadow: 0 0 8px var(--accent-gold);
  border-radius: 2px;
}

/* Header Action */
.header-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.35rem;
  border-radius: 6px;
  border: 1px solid var(--border-gold);
  background: rgba(223, 183, 67, 0.06);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all var(--transition-normal);
  backdrop-filter: blur(8px);
}

.header-cta-btn svg {
  color: var(--accent-gold);
  transition: transform var(--transition-fast);
}

.header-cta-btn:hover {
  background: rgba(223, 183, 67, 0.16);
  border-color: var(--accent-gold);
  box-shadow: 0 0 20px var(--accent-gold-glow);
  transform: translateY(-2px);
}

/* Mobile Hamburger Button */
.mobile-nav-toggle {
  display: none;
  background: rgba(6, 17, 38, 0.85);
  border: 1px solid var(--border-gold);
  border-radius: 8px;
  width: 44px;
  height: 44px;
  padding: 10px 8px;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  z-index: 110;
  transition: all var(--transition-fast);
  box-shadow: 0 0 12px rgba(223, 183, 67, 0.15);
}

.mobile-nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--accent-gold);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.mobile-nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100vh;
  background: rgba(2, 6, 16, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 95;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 2rem;
}

.mobile-drawer.open {
  right: 0;
}

.mobile-drawer ul {
  list-style: none;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.mobile-drawer li a {
  font-family: var(--font-body);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.mobile-drawer li a:hover,
.mobile-drawer li a.active {
  color: var(--accent-gold);
}

@media (max-width: 1023px) {
  .nav-links, .header-cta-btn {
    display: none;
  }
  .mobile-nav-toggle {
    display: flex;
  }
}