:root {
  /* Brand palette */
  --color-primary: #4F46E5;
  --color-primary-dark: #4338CA;
  --color-secondary: #06B6D4;
  --color-accent: #F59E0B;
  --color-success: #22C55E;
  --color-bg: #F8FAFC;
  --color-dark: #111827;
  --color-dark-soft: #1F2937;

  /* Text */
  --text-heading: #111827;
  --text-body: #4B5563;
  --text-muted: #9CA3AF;
  --text-on-dark: #F9FAFB;

  /* Surfaces */
  --surface-white: #FFFFFF;
  --surface-glass: rgba(255, 255, 255, 0.65);
  --surface-glass-border: rgba(255, 255, 255, 0.35);
  --surface-dark-glass: rgba(17, 24, 39, 0.55);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
  --gradient-accent: linear-gradient(135deg, #F59E0B 0%, #4F46E5 100%);
  --gradient-mesh: radial-gradient(at 20% 20%, rgba(79,70,229,0.25) 0px, transparent 50%),
                    radial-gradient(at 80% 0%, rgba(6,182,212,0.25) 0px, transparent 50%),
                    radial-gradient(at 50% 90%, rgba(245,158,11,0.18) 0px, transparent 50%);

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Radii & shadows */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --shadow-soft: 0 8px 30px rgba(17, 24, 39, 0.08);
  --shadow-card: 0 10px 40px rgba(79, 70, 229, 0.12);
  --shadow-glass: 0 8px 32px rgba(31, 38, 135, 0.15);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.2s;
  --dur-mid: 0.45s;
  --dur-slow: 0.8s;

  /* Layout */
  --container-max: 1240px;
  --header-height: 84px;
}

/* ===== Dark theme override ===== */
html[data-theme="dark"] {
  --color-bg: #0B1220;
  --text-heading: #F3F4F6;
  --text-body: #AEB4C2;
  --text-muted: #7B8496;

  --surface-white: #131B2E;
  --surface-glass: rgba(19, 27, 46, 0.7);
  --surface-glass-border: rgba(255, 255, 255, 0.08);
  --surface-dark-glass: rgba(0, 0, 0, 0.35);

  --gradient-mesh: radial-gradient(at 20% 20%, rgba(99,102,241,0.18) 0px, transparent 50%),
                    radial-gradient(at 80% 0%, rgba(6,182,212,0.16) 0px, transparent 50%),
                    radial-gradient(at 50% 90%, rgba(245,158,11,0.10) 0px, transparent 50%);

  --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.45);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.5);
}