:root {
  --bg-dark: #0C0C0C;
  --bg-card: #14171A;
  --bg-card-hover: #1A1F24;
  --border-color: rgba(215, 226, 234, 0.1);
  --border-glow: rgba(56, 189, 248, 0.25);
  --text-light: #D7E2EA;
  --text-muted: #8E9BAE;
  --accent-gold: #E5A93C;
  --accent-emerald: #10B981;
  --accent-cyan: #38BDF8;
  --font-kanit: 'Kanit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-arabic: 'Amiri', 'Scheherazade New', serif;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-light);
  font-family: var(--font-kanit);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Cosmic Background Glow */
.cosmic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  background: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(229, 169, 60, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.03) 0%, transparent 60%);
  pointer-events: none;
}

/* Typography Helpers */
.font-mono {
  font-family: var(--font-mono);
}

.font-arabic {
  font-family: var(--font-arabic);
}

/* Glass Card */
.glass-panel {
  background: rgba(20, 23, 26, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-panel:hover {
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 20px -5px rgba(56, 189, 248, 0.15);
}

/* Golden Accent Glow */
.gold-glow {
  color: var(--accent-gold);
  text-shadow: 0 0 20px rgba(229, 169, 60, 0.3);
}

.emerald-glow {
  color: var(--accent-emerald);
  text-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.cyan-glow {
  color: var(--accent-cyan);
  text-shadow: 0 0 20px rgba(56, 189, 248, 0.3);
}

/* Progress Bar */
#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-emerald), var(--accent-gold));
  z-index: 100;
  transition: width 0.1s ease-out;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #0c0c0c;
}
::-webkit-scrollbar-thumb {
  background: #252d36;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #38bdf8;
}

/* Infographic Diagram Styling */
.infographic-wrapper {
  background: linear-gradient(180deg, rgba(20, 23, 26, 0.9) 0%, rgba(12, 12, 12, 0.95) 100%);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: 16px;
  padding: 24px;
  margin: 36px 0;
  position: relative;
  overflow: hidden;
}

.infographic-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-gold), transparent);
}

/* Responsive Embed */
.video-responsive {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.video-responsive iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}