/**
 * Hnextmove Design System Tokens
 * Kinetic Biomechanical Joint Health & Orthopedics
 * Modern Senior-Architected CSS Custom Properties
 */

:root {
  /* Vibrant Kinetic Color Palette (Non-traditional Athletic-Biomechanical) */
  --color-volt: #D4FE2B;
  --color-volt-glow: rgba(212, 254, 43, 0.35);
  --color-volt-hover: #E2FF54;
  --color-volt-dark: #A9D104;

  --color-tangerine: #FF532A;
  --color-tangerine-glow: rgba(255, 83, 42, 0.35);
  --color-tangerine-hover: #FF6B47;

  --color-cyber-green: #00F076;
  --color-cyan-glow: #00E5FF;

  /* Deep Biomechanical Surfaces */
  --bg-deep: #090D14;
  --bg-surface-1: #101622;
  --bg-surface-2: #172131;
  --bg-surface-3: #1F2C41;
  --bg-surface-glass: rgba(16, 22, 34, 0.82);
  --bg-surface-card: #131A27;

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-strong: rgba(255, 255, 255, 0.28);
  --border-volt: rgba(212, 254, 43, 0.4);
  --border-tangerine: rgba(255, 83, 42, 0.4);

  /* Typography Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #C3CDD9;
  --text-muted: #8494A7;
  --text-dim: #546476;
  --text-volt: #D4FE2B;
  --text-tangerine: #FF532A;

  /* Typography Hierarchy */
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, Monaco, monospace;

  /* Fluid Font Sizes */
  --fs-xs: 0.75rem;     /* 12px */
  --fs-sm: 0.875rem;    /* 14px */
  --fs-base: 1rem;      /* 16px */
  --fs-md: 1.125rem;    /* 18px */
  --fs-lg: 1.25rem;     /* 20px */
  --fs-xl: 1.5rem;      /* 24px */
  --fs-2xl: 2rem;       /* 32px */
  --fs-3xl: clamp(2rem, 4vw, 2.75rem); /* ~44px */
  --fs-4xl: clamp(2.5rem, 6vw, 3.75rem); /* ~60px */
  --fs-hero: clamp(3rem, 7.5vw, 5.25rem); /* ~84px */

  /* Spacing Scale */
  --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 */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

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

  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.7);
  --shadow-volt-glow: 0 0 30px rgba(212, 254, 43, 0.22);
  --shadow-tangerine-glow: 0 0 30px rgba(255, 83, 42, 0.25);

  /* Transitions */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-spring);
  --transition-base: 250ms var(--ease-spring);
  --transition-slow: 400ms var(--ease-spring);

  /* Layout Containers */
  --container-max: 1320px;
  --header-height: 80px;
  --topbar-height: 40px;
}

/* ==========================================================================
   Mobile Adaptive Design Tokens (< 768px)
   Proportional Typography, Compressed Spacing Scale & Touch Ergonomics
   ========================================================================== */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --topbar-height: 0px;

    /* Proportional Mobile Font Sizes (< 768px) */
    --fs-hero: clamp(1.5rem, 5.5vw, 1.85rem);    /* 24px - 29.6px */
    --fs-4xl: clamp(1.35rem, 4.8vw, 1.6rem);     /* 21.6px - 25.6px */
    --fs-3xl: clamp(1.2rem, 4.2vw, 1.4rem);      /* 19.2px - 22.4px */
    --fs-2xl: 1.15rem;                           /* ~18.4px */
    --fs-xl: 1.05rem;                            /* ~16.8px */
    --fs-lg: 0.95rem;                            /* ~15.2px */
    --fs-md: 0.9rem;                             /* ~14.4px */
    --fs-base: 0.85rem;                          /* ~13.6px */
    --fs-sm: 0.78rem;                            /* ~12.5px */
    --fs-xs: 0.7rem;                             /* ~11.2px */

    /* Scaled Mobile Spacing Scale */
    --space-5: 1rem;      /* 16px */
    --space-6: 1.25rem;   /* 20px */
    --space-8: 1.5rem;    /* 24px */
    --space-10: 1.75rem;  /* 28px */
    --space-12: 2rem;     /* 32px */
    --space-16: 2.5rem;   /* 40px */
    --space-20: 3rem;     /* 48px */
    --space-24: 3.5rem;   /* 56px */
  }
}

@media (max-width: 480px) {
  :root {
    /* Compact Phone Font Sizes (< 480px, iPhone SE, etc.) */
    --fs-hero: clamp(1.35rem, 5vw, 1.65rem);     /* 21.6px - 26.4px */
    --fs-4xl: clamp(1.25rem, 4.5vw, 1.45rem);    /* 20px - 23.2px */
    --fs-3xl: clamp(1.125rem, 3.8vw, 1.3rem);    /* 18px - 20.8px */
    --fs-2xl: 1.08rem;                           /* ~17.2px */
    --fs-xl: 0.98rem;                            /* ~15.6px */
    --fs-lg: 0.9rem;                             /* ~14.4px */
    --fs-md: 0.85rem;                            /* ~13.6px */
    --fs-base: 0.8125rem;                        /* ~13px */
    --fs-sm: 0.75rem;                            /* ~12px */
    --fs-xs: 0.6875rem;                          /* ~11px */
  }
}