:root {
  /* Default Theme (Cyber Dark) */
  --bg-primary: #0a0a0b;
  --bg-secondary: #141416;
  --accent-blue: #0066ff;
  --accent-cyan: #00f2ff;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;

  /* Gradients */
  --grad-electric: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  --grad-dark-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);

  /* Shadow & Glow */
  --glow-blue: 0 0 20px rgba(0, 102, 255, 0.4);
  --glow-cyan: 0 0 20px rgba(0, 242, 255, 0.4);

  /* Typography */
  --font-main: 'Inter', sans-serif;
}

body.theme-vibrant {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --accent-blue: #3b82f6;
  --accent-cyan: #10b981;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
}

body.theme-minimal {
  --bg-primary: #ffffff;
  --bg-secondary: #f1f5f9;
  --accent-blue: #2563eb;
  --accent-cyan: #64748b;
  --text-primary: #0f172a;
  --text-secondary: #475569;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography Utility */
h1,
h2,
h3 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.text-gradient {
  background: var(--grad-electric);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-padding {
  padding: 8rem 0;
}

/* Buttons */
.btn-primary {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--grad-electric);
  color: #000;
  text-decoration: none;
  font-weight: 600;
  border-radius: 4px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: var(--glow-blue);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 242, 255, 0.6);
}

.btn-secondary {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  border-radius: 4px;
  transition: background 0.3s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* Cards */
.card {
  background: var(--grad-dark-surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 2rem;
  backdrop-filter: blur(10px);
}
    border-radius: 12px;
    padding: 2rem;
    backdrop-filter: blur(10px);
}