/* ============================================
   UTECH Design System — Design Tokens
   ============================================ */

:root {
  /* ── Brand Colors ── */
  --primary: #35D9C3;
  --primary-hover: #20C7B0;
  --primary-light: rgba(53, 217, 195, 0.12);
  --primary-glow: rgba(53, 217, 195, 0.34);
  --secondary: #2EA78E;
  --secondary-hover: #248A76;
  --accent: #E6FFFA;

  /* ── Gradients ── */
  --gradient-primary: linear-gradient(135deg, #35D9C3, #2EA78E);
  --gradient-primary-hover: linear-gradient(135deg, #20C7B0, #248A76);
  --gradient-hero: radial-gradient(circle at 75% 20%, rgba(53, 217, 195, 0.16), transparent 32%), linear-gradient(135deg, #111827 0%, #101A28 52%, #0B1220 100%);
  --gradient-text: linear-gradient(135deg, #E6FFFA, #35D9C3, #2EA78E);
  --gradient-dark: linear-gradient(180deg, #111827 0%, #0B1220 100%);
  --gradient-cta: linear-gradient(135deg, rgba(53, 217, 195, 0.16), rgba(46, 167, 142, 0.12));

  /* ── Dark Theme ── */
  --dark-bg: #111827;
  --dark-bg-alt: #0B1220;
  --dark-surface: #172131;
  --dark-surface-hover: #1E2B3D;
  --dark-border: #263448;
  --dark-border-light: rgba(92, 118, 145, 0.28);

  /* ── Light Theme ── */
  --light-bg: #F9FAFB;
  --light-surface: #FFFFFF;
  --light-border: #E5E7EB;

  /* ── Text ── */
  --text-white: #FFFFFF;
  --text-primary: #F3F4F6;
  --text-secondary: #A7B4C5;
  --text-muted: #718096;
  --text-dark: #111827;
  --text-dark-secondary: #4B5563;

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

  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --text-lg: clamp(1rem, 0.95rem + 0.35vw, 1.125rem);
  --text-xl: clamp(1.15rem, 1rem + 0.5vw, 1.25rem);
  --text-2xl: clamp(1.35rem, 1.1rem + 0.75vw, 1.5rem);
  --text-3xl: clamp(1.6rem, 1.2rem + 1.25vw, 1.875rem);
  --text-4xl: clamp(1.9rem, 1.3rem + 2vw, 2.25rem);
  --text-5xl: clamp(2.2rem, 1.5rem + 2.5vw, 3rem);
  --text-6xl: clamp(2.5rem, 1.5rem + 3.5vw, 3.75rem);

  /* ── Spacing ── */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* ── Border Radius ── */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px var(--primary-glow);
  --shadow-glow-lg: 0 0 40px var(--primary-glow), 0 0 80px rgba(16, 185, 129, 0.1);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.12);

  /* ── Transitions ── */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ── Z-Index ── */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 50;
  --z-overlay: 100;
  --z-modal: 200;
  --z-toast: 300;

  /* ── Layout ── */
  --container-max: 1200px;
  --container-narrow: 800px;
  --nav-height: 80px;
  --section-padding: clamp(4rem, 8vw, 8rem);
}