/* Design System & Motion Framework (Original Implementation Inspired, Not Copied) */
:root {
  /* Color Tokens */
  --color-gold: #C7A03B;
  --color-gold-rgb: 199,160,59;
  --color-black: #000000;
  --color-deep: #0a0a0a;
  --color-dark: #1a1a1a;
  --color-ink: #121212;
  --color-gray-100: #f8f9fa;
  --color-gray-200: #eceff1;
  --color-gray-300: #dee2e6;
  --color-gray-500: #6c757d;
  --color-gray-600: #495057;
  --color-gray-700: #343a40;
  --color-gray-800: #212529;
  --color-white: #ffffff;

  /* Elevation */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.15);
  --shadow-sm: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-md: 0 10px 30px -5px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 50px -10px rgba(0,0,0,0.5);
  --shadow-gold: 0 12px 40px rgba(var(--color-gold-rgb),0.25);

  /* Motion */
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-emphasized: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-decelerate: cubic-bezier(0.0, 0, 0.2, 1);
  --ease-accelerate: cubic-bezier(0.4, 0.0, 1, 1);

  --duration-xs: 120ms; 
  --duration-sm: 240ms; 
  --duration-md: 420ms; 
  --duration-lg: 700ms;

  /* Typography Scale */
  --font-display-xl: clamp(3.5rem, 8vw, 6rem);
  --font-display-lg: clamp(3rem, 6vw, 4.5rem);
  --font-display-md: clamp(2.25rem, 5vw, 3.5rem);
  --font-display-sm: clamp(1.75rem, 3.5vw, 2.5rem);
  --font-text-lg: 1.25rem;
  --font-text-md: 1rem;
  --font-text-sm: 0.85rem;

  /* Layout */
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 24px;
  --radius-full: 999px;

  --nav-height: 82px;

  /* Theme dynamic vars */
  --bg-base: var(--color-white);
  --bg-alt: var(--color-gray-100);
  --bg-elevated: var(--color-white);
  --bg-hero: radial-gradient(circle at 20% 20%, #111 0%, #000 70%);
  --text-base: var(--color-dark);
  --text-inverse: var(--color-white);
  --text-muted: var(--color-gray-500);
  --border-color: rgba(255,255,255,0.08);
  --focus-ring: 0 0 0 3px rgba(var(--color-gold-rgb),0.45);
}

.dark-mode {
  --bg-base: var(--color-deep);
  --bg-alt: #141414;
  --bg-elevated: #181818;
  --bg-hero: radial-gradient(circle at 30% 30%, #222 0%, #050505 70%);
  --text-base: var(--color-gray-100);
  --text-muted: #b5bcc3;
  --border-color: rgba(255,255,255,0.1);
}

html { scroll-behavior: smooth; }
body { background: var(--bg-base); color: var(--text-base); }

/* Scroll Progress Bar */
#scroll-progress { position: fixed; top: 0; left: 0; height: 4px; width: 0; background: linear-gradient(90deg,var(--color-gold),#e6c465,#f5dd90); z-index: 9999; box-shadow: var(--shadow-sm); transition: width 0.15s linear; }

/* Cursor Aura (desktop only) */
.cursor-aura { position: fixed; top: 0; left: 0; width: 55px; height: 55px; pointer-events: none; border-radius: 50%; background: radial-gradient(circle at 30% 30%, rgba(var(--color-gold-rgb),0.35), rgba(var(--color-gold-rgb),0)); mix-blend-mode: screen; transform: translate(-50%, -50%) scale(0.85); opacity: 0; transition: opacity var(--duration-sm) var(--ease-standard), transform var(--duration-sm) var(--ease-standard); z-index: 9998; }
@media (pointer: fine) { body:hover .cursor-aura { opacity: 1; } }
.prefers-reduced-motion .cursor-aura { display: none; }

/* Reveal Animation System */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity var(--duration-md) var(--ease-decelerate), transform var(--duration-md) var(--ease-decelerate); will-change: opacity, transform; }
.reveal[data-reveal="fade-up"].reveal--in { opacity: 1; transform: translateY(0); }
.reveal[data-reveal="fade"] { transform: none; }
.reveal[data-reveal="fade"].reveal--in { opacity: 1; }
.reveal[data-reveal="scale"].reveal--in { opacity: 1; transform: translateY(0) scale(1); }
.reveal[data-reveal="scale"] { transform: translateY(35px) scale(.92); }
.reveal[data-stagger] { transition-delay: calc(var(--stagger-index,0) * 90ms); }

/* Parallax (applied via transform) */
[data-parallax] { will-change: transform; }

/* High Contrast Mode */
.high-contrast { filter: contrast(115%) saturate(110%); }

/* Interactive Elements */
.magnetic { position: relative; transition: transform var(--duration-sm) var(--ease-standard); }
.magnetic--active { transform: translate(var(--mx,0), var(--my,0)); }

/* Gold Gradient Text Utility */
.text-gradient-gold { background: linear-gradient(90deg, var(--color-gold), #e6c465); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Progress rings / accent lines */
.accent-bar { position: relative; padding-left: 1.25rem; }
.accent-bar:before { content: ''; position: absolute; left: 0; top: .35rem; width: 4px; height: 1.5rem; background: linear-gradient(var(--color-gold), #e6c465); border-radius: 2px; }

/* Utility */
.blur-edge { backdrop-filter: blur(16px); background: rgba(0,0,0,0.4); }
.glow-gold { box-shadow: 0 0 0 1px rgba(var(--color-gold-rgb),0.35), 0 0 25px -5px rgba(var(--color-gold-rgb),0.55); }

/* Scroll Hide / Reveal Nav Support */
.nav-auto-hide { transition: transform var(--duration-sm) var(--ease-standard), background-color var(--duration-sm); will-change: transform; }
.nav-auto-hide.nav--hidden { transform: translateY(-110%); }

/* Marquee */
.auto-marquee { display: flex; gap: 4rem; overflow: hidden; position: relative; }
.auto-marquee-track { display: flex; gap: 4rem; animation: marquee-linear 40s linear infinite; }
@keyframes marquee-linear { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.auto-marquee:hover .auto-marquee-track { animation-play-state: paused; }

/* Reduced Motion Respect */
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; opacity: 1 !important; transform: none !important; }
  [data-parallax] { transform: none !important; }
  .auto-marquee-track { animation: none; }
  #scroll-progress { transition: none; }
  body { --motion-safe: 0; }
  .cursor-aura { display: none; }
}

/* Scroll Progress Shadow merging with nav */
#scroll-progress.shadowed { box-shadow: 0 2px 8px rgba(0,0,0,0.3); }

/* Button Enhancements */
.btn-enhanced { position: relative; overflow: hidden; }
.btn-enhanced:before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 30%, rgba(var(--color-gold-rgb),0.25), transparent 70%); opacity: 0; transition: opacity var(--duration-sm) var(--ease-standard); }
.btn-enhanced:hover:before { opacity: 1; }

/* Stacked Hero Accent Circles */
.hero-accent-layer { position: absolute; border-radius: 50%; pointer-events: none; mix-blend-mode: overlay; background: radial-gradient(circle at 40% 40%, rgba(var(--color-gold-rgb),0.12), rgba(var(--color-gold-rgb),0) 70%); animation: pulse-accent 8s var(--ease-standard) infinite; }
.hero-accent-layer.layer-1 { width: 600px; height: 600px; top: -150px; right: -120px; }
.hero-accent-layer.layer-2 { width: 420px; height: 420px; bottom: -120px; left: -100px; animation-delay: 3s; }
@keyframes pulse-accent { 0%,100% { transform: scale(1); opacity: .55; } 50% { transform: scale(1.15); opacity: .85; } }

/* Accessibility Focus */
:focus-visible { outline: none; box-shadow: var(--focus-ring); }

/* Scrollbar (Webkit) */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-alt); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--color-gold), #8d6b14); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: linear-gradient(#e6c465, var(--color-gold)); }