/* ==========================================================================
   DESIGN TOKENS & SYSTEM VARIABLES
   Portfolio of Amit Kumar — VP UX Design & GenAI-Powered UX
   ========================================================================== */

:root {
  /* Brand Typography */
  --font-display: 'Bricolage Grotesque', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Space Grotesk', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-body: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Obsidian Glass Theme (Default Dark) */
  --bg-primary: #090C16;
  --bg-secondary: #111528;
  --bg-tertiary: #181E38;
  --bg-surface: rgba(17, 21, 40, 0.7);
  --bg-surface-elevated: rgba(24, 30, 56, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.035);
  --bg-glass-hover: rgba(255, 255, 255, 0.07);

  /* Accent Color Palette */
  --teal-primary: #14B8A6;
  --teal-glow: #2DD4BF;
  --cyan-primary: #06B6D4;
  --indigo-accent: #818CF8;
  --purple-accent: #A855F7;
  --amber-accent: #F59E0B;
  --emerald-accent: #10B981;
  --coral-hot: #F43F5E;

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #06B6D4 0%, #14B8A6 50%, #2DD4BF 100%);
  --grad-accent: linear-gradient(135deg, #14B8A6 0%, #818CF8 100%);
  --grad-warm: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  --grad-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.01) 100%);
  --grad-card-glow: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(20, 184, 166, 0.15), transparent 70%);

  /* Text & Foreground */
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-accent: #2DD4BF;
  --text-inverse: #090C16;

  /* Borders & Lines */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-focus: rgba(20, 184, 166, 0.6);
  --border-glow: rgba(45, 212, 191, 0.3);

  /* Shadows & Depth */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 32px rgba(20, 184, 166, 0.25);
  --shadow-card-hover: 0 20px 48px rgba(6, 182, 212, 0.18), 0 0 0 1px rgba(20, 184, 166, 0.3);

  /* Spacing Scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 128px;

  /* Border Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Animation Timings & Easing */
  --ease-elastic: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-snappy: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.18s var(--ease-snappy);
  --transition-normal: 0.3s var(--ease-smooth);
  --transition-slow: 0.6s var(--ease-elastic);

  /* Layout */
  --container-max: 1240px;
  --container-wide: 1400px;
  --nav-height: 76px;
}

/* Studio Light Mode Variant */
html[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F1F5F9;
  --bg-surface: rgba(255, 255, 255, 0.82);
  --bg-surface-elevated: rgba(255, 255, 255, 0.95);
  --bg-glass: rgba(0, 0, 0, 0.03);
  --bg-glass-hover: rgba(0, 0, 0, 0.06);

  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --text-accent: #0D9488;
  --text-inverse: #FFFFFF;

  --border-subtle: rgba(15, 23, 42, 0.08);
  --border-glass: rgba(15, 23, 42, 0.12);
  --border-focus: rgba(13, 148, 136, 0.5);
  --border-glow: rgba(13, 148, 136, 0.2);

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 12px 28px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 56px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 28px rgba(13, 148, 136, 0.18);
  --shadow-card-hover: 0 20px 48px rgba(13, 148, 136, 0.12), 0 0 0 1px rgba(13, 148, 136, 0.25);

  --grad-card-glow: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(13, 148, 136, 0.08), transparent 70%);
}