/* =================================================================
   DESIGN TOKENS - Apple-Inspired Design System
   Presentify Landing Page Redesign
   ================================================================= */

:root {
  /* ===============================================================
     TYPOGRAPHY
     =============================================================== */

  /* Font Family - System Stack (Apple-first) */
  --font-system: -apple-system, BlinkMacSystemFont, 'SF Pro Display',
                 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;

  /* Font Scale (Based on Apple HIG) */
  --font-size-xs: 0.75rem;      /* 12px - Legal, footnotes */
  --font-size-sm: 0.875rem;     /* 14px - Captions, labels */
  --font-size-base: 1rem;       /* 16px - Body (iOS minimum) */
  --font-size-md: 1.0625rem;    /* 17px - Apple default body */
  --font-size-lg: 1.25rem;      /* 20px - Large body */
  --font-size-xl: 1.5rem;       /* 24px - Small heading */
  --font-size-2xl: 2rem;        /* 32px - Medium heading */
  --font-size-3xl: 2.5rem;      /* 40px - Large heading (mobile hero) */
  --font-size-4xl: 3rem;        /* 48px - Hero heading */
  --font-size-5xl: 3.25rem;     /* 52px - Hero max */

  /* Font Weights */
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Line Heights */
  --leading-tight: 1.15;        /* Headlines */
  --leading-snug: 1.3;          /* Subheadings */
  --leading-normal: 1.5;        /* Body text */
  --leading-relaxed: 1.6;       /* Long form text */

  /* Letter Spacing */
  --tracking-tight: -0.5px;     /* Headlines */
  --tracking-normal: 0;         /* Body */
  --tracking-wide: 0.3px;       /* Buttons, labels */

  /* ===============================================================
     COLORS - Dark Theme
     =============================================================== */

  /* Text Colors */
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.85);
  --text-tertiary: rgba(255, 255, 255, 0.6);
  --text-quaternary: rgba(255, 255, 255, 0.5);
  --text-placeholder: rgba(255, 255, 255, 0.5);

  /* Background Colors */
  --bg-primary: #03081C;
  --bg-secondary: #0a0a0f;
  --bg-tertiary: #1c1c1e;

  /* Glass Effect Colors (Subtle) */
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-bg-active: rgba(255, 255, 255, 0.10);
  --glass-border: rgba(255, 255, 255, 0.10);
  --glass-border-hover: rgba(255, 255, 255, 0.15);
  --glass-border-focus: rgba(85, 105, 255, 0.4);
  --glass-blur: 10px;

  /* Accent Colors */
  --accent-primary: #5569ff;
  --accent-secondary: #6c5ce7;
  --accent-gradient: linear-gradient(90deg, #6828FF, #56BEF5, #27DF8C);

  /* ===============================================================
     SPACING (8px Grid System)
     =============================================================== */

  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */

  /* ===============================================================
     BORDERS & RADIUS
     =============================================================== */

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 9999px;

  /* ===============================================================
     SHADOWS (Subtle for Dark Theme)
     =============================================================== */

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-focus: 0 0 0 3px rgba(85, 105, 255, 0.1);

  /* ===============================================================
     TRANSITIONS
     =============================================================== */

  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 200ms;
  --duration-slow: 300ms;
}
