/*— Premium SaaS Style*/

:root {
  /* ---------- Color System ---------- */
  --color-bg:            #F8FAFC;
  --color-surface:       #FFFFFF;
  --color-surface-alt:   #F1F5F9;
  --color-text-primary:  #0F172A;
  --color-text-secondary:#64748B;
  --color-text-muted:    #94A3B8;
  --color-accent:        #4F46E5;
  --color-accent-hover:  #4338CA;
  --color-accent-soft:   #EEF2FF;
  --color-border:        #E2E8F0;
  --color-border-strong: #CBD5E1;
  --color-success:       #10B981;
  --color-warning:       #F59E0B;
  --color-danger:        #EF4444;
  --color-info:          #0EA5E9;
  --color-chart-1:       #4F46E5;
  --color-chart-2:       #10B981;
  --color-chart-3:       #F59E0B;
  --color-chart-4:       #EC4899;
  --color-chart-5:       #0EA5E9;

  /* ---------- Typography ---------- */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, Consolas, monospace;

  --fs-xs:   0.75rem;    /* 12 */
  --fs-sm:   0.875rem;   /* 14 */
  --fs-base: 1rem;       /* 16 */
  --fs-md:   1.125rem;   /* 18 */
  --fs-lg:   1.25rem;    /* 20 */
  --fs-xl:   1.5rem;     /* 24 */
  --fs-2xl:  1.875rem;   /* 30 */
  --fs-3xl:  2.25rem;    /* 36 */
  --fs-4xl:  3rem;       /* 48 */
  --fs-5xl:  3.75rem;    /* 60 */
  --fs-6xl:  4.5rem;     /* 72 */

  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semibold:600;
  --fw-bold:    700;
  --fw-extrabold:800;

  --lh-tight:   1.1;
  --lh-snug:    1.3;
  --lh-normal:  1.5;
  --lh-relaxed: 1.65;

  /* ---------- Spacing ---------- */
  --space-1:  0.25rem;   /* 4 */
  --space-2:  0.5rem;    /* 8 */
  --space-3:  0.75rem;   /* 12 */
  --space-4:  1rem;      /* 16 */
  --space-5:  1.25rem;   /* 20 */
  --space-6:  1.5rem;    /* 24 */
  --space-8:  2rem;      /* 32 */
  --space-10: 2.5rem;    /* 40 */
  --space-12: 3rem;      /* 48 */
  --space-16: 4rem;      /* 64 */
  --space-20: 5rem;      /* 80 */
  --space-24: 6rem;      /* 96 */
  --space-32: 8rem;      /* 128 */

  /* ---------- Radius ---------- */
  --radius-xs:   4px;
  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   16px;
  --radius-xl:   20px;
  --radius-2xl:  24px;
  --radius-3xl:  32px;
  --radius-full: 9999px;

  /* ---------- Shadows ---------- */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.06), 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-2xl:0 25px 50px -12px rgba(15, 23, 42, 0.15);
  --shadow-glow: 0 10px 40px -10px rgba(79, 70, 229, 0.30);
  --shadow-card-hover: 0 20px 40px -10px rgba(15, 23, 42, 0.12);

  /* ---------- Transitions ---------- */
  --transition-fast:   150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:   250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:   400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ---------- Layout ---------- */
  --container-max: 1240px;
  --container-padding: 1.5rem;
  --navbar-height: 72px;

  /* ---------- Z-Index ---------- */
  --z-base:    1;
  --z-elevated:10;
  --z-sticky:  100;
  --z-overlay: 500;
  --z-modal:   1000;
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-base: 0ms;
    --transition-slow: 0ms;
    --transition-spring: 0ms;
  }
}