/* DSIT Corporate Design System Variables */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Fonts */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Spacing System */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-xxl: 4rem;
  --space-section: 6rem;

  /* Layout */
  --max-width-site: 1280px;
  --max-width-text: 75ch;
  --header-height: 80px;
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  --border-radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Elevation (Light Mode Default) */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.06), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.03);

  /* Light Theme Palette Mapping */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-accent-soft: #eff6ff;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-on-accent: #ffffff;
  
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;

  /* Functional Brands */
  --brand-navy: #0f1e36;
  --brand-sapphire: #2563eb;
  --brand-cyan: #0ea5e9;
  --brand-cyan-glow: rgba(14, 165, 233, 0.15);
  --brand-sapphire-glow: rgba(37, 99, 235, 0.1);
  --brand-gradient: linear-gradient(135deg, #0f1e36 0%, #2563eb 100%);
  --brand-accent-gradient: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);

  /* Alert States */
  --color-success: #10b981;
  --color-success-bg: #ecfdf5;
  --color-error: #ef4444;
  --color-error-bg: #fef2f2;
}

/* Dark Theme overrides */
[data-theme="dark"] {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-accent-soft: rgba(37, 99, 235, 0.08);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-on-accent: #ffffff;

  --border-color: #2d3748;
  --border-focus: #60a5fa;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.4);

  --brand-navy: #1e293b;
  --brand-gradient: linear-gradient(135deg, #1e293b 0%, #3b82f6 100%);
  --brand-sapphire-glow: rgba(59, 130, 246, 0.15);
  --brand-cyan-glow: rgba(14, 165, 233, 0.25);
}