/* ==========================================================================
   STSERVER — Enterprise Design System
   Professional Light Mode · Based on Presidio / WWT / Accenture patterns
   ========================================================================== */

:root {
  /* ── Color Palette — Enterprise Light ──────────────────────────────────── */

  /* Backgrounds */
  --color-bg-primary:      #FFFFFF;       /* Pure white — main bg */
  --color-bg-secondary:    #F7F9FC;       /* Off-white — alternating sections */
  --color-bg-tertiary:     #EEF2F7;       /* Light gray — subtle cards */
  --color-bg-card:         #FFFFFF;
  --color-bg-card-hover:   #F7F9FC;
  --color-bg-elevated:     #FFFFFF;
  --color-bg-dark:         #0A1628;       /* Deep navy — CTA sections, footer */
  --color-bg-dark-2:       #111E35;       /* Slightly lighter navy */
  --color-bg-nav:          #FFFFFF;

  /* Borders */
  --color-border:          #E2E8F0;       /* Subtle gray border */
  --color-border-hover:    #CBD5E1;
  --color-border-active:   #1570EF;
  --color-border-dark:     rgba(255,255,255,0.08);

  /* Accent — Professional Navy + Electric Blue (NOT neon) */
  --color-navy:            #0A1628;       /* Deep navy — headlines, footer */
  --color-navy-mid:        #1E3A5F;       /* Mid navy — secondary text on dark */
  --color-blue:            #1570EF;       /* Professional blue — CTAs */
  --color-blue-hover:      #1264D5;       /* CTA hover */
  --color-blue-light:      #EFF6FF;       /* Blue tint bg */
  --color-blue-mid:        #2563EB;       /* Darker blue for text */

  /* Accent kept for subtle use — muted, not neon */
  --color-accent-blue:     #1570EF;
  --color-accent-blue-dim: rgba(21, 112, 239, 0.1);
  --color-accent-cyan:     #0EA5E9;       /* Sky blue — muted, professional */
  --color-accent-cyan-dim: rgba(14, 165, 233, 0.08);

  /* Status */
  --color-success:         #16A34A;
  --color-warning:         #D97706;
  --color-error:           #DC2626;
  --color-info:            #1570EF;

  /* Text */
  --color-text-primary:    #0A1628;       /* Near-black navy — main text */
  --color-text-secondary:  #475569;       /* Medium gray — body copy */
  --color-text-tertiary:   #94A3B8;       /* Light gray — captions, labels */
  --color-text-accent:     #1570EF;
  --color-text-on-dark:    #F1F5F9;       /* Text on dark sections */
  --color-text-on-dark-2:  #94A3B8;       /* Secondary text on dark */
  --color-text-inverse:    #FFFFFF;

  /* Gradients — Enterprise style */
  --gradient-hero:         linear-gradient(160deg, #FFFFFF 0%, #F7F9FC 60%, #EEF2F7 100%);
  --gradient-accent:       linear-gradient(135deg, #1570EF 0%, #0EA5E9 100%);
  --gradient-accent-hover: linear-gradient(135deg, #1264D5 0%, #0284C7 100%);
  --gradient-dark:         linear-gradient(160deg, #0A1628 0%, #111E35 100%);
  --gradient-text:         linear-gradient(135deg, #1570EF, #0EA5E9);
  --gradient-card:         linear-gradient(145deg, #FFFFFF, #F7F9FC);
  --gradient-glow:         radial-gradient(ellipse at top, rgba(21,112,239,0.06) 0%, transparent 60%);

  /* ── Typography ─────────────────────────────────────────────────────────── */

  --font-primary:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:      'JetBrains Mono', 'Fira Code', monospace;

  /* Font Sizes */
  --text-xs:        clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --text-sm:        clamp(0.8rem, 0.75rem + 0.3vw, 0.9rem);
  --text-base:      clamp(0.9rem, 0.85rem + 0.3vw, 1rem);
  --text-lg:        clamp(1.05rem, 0.95rem + 0.5vw, 1.2rem);
  --text-xl:        clamp(1.2rem, 1.05rem + 0.75vw, 1.5rem);
  --text-2xl:       clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --text-3xl:       clamp(1.8rem, 1.4rem + 2vw, 2.75rem);
  --text-4xl:       clamp(2.2rem, 1.6rem + 3vw, 3.75rem);
  --text-5xl:       clamp(2.8rem, 2rem + 4vw, 5rem);

  /* Weights */
  --weight-regular:  400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;
  --weight-extrabold:800;

  /* Line Heights */
  --leading-tight:   1.15;
  --leading-snug:    1.3;
  --leading-normal:  1.6;
  --leading-relaxed: 1.75;

  /* Letter Spacing */
  --tracking-tight:  -0.02em;
  --tracking-normal: 0;
  --tracking-wide:   0.04em;
  --tracking-wider:  0.08em;
  --tracking-widest: 0.14em;

  /* ── 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;

  /* ── Layout ──────────────────────────────────────────────────────────────── */
  --container-sm:    640px;
  --container-md:    768px;
  --container-lg:    1024px;
  --container-xl:    1200px;
  --container-2xl:   1400px;

  --nav-height:      72px;
  --section-padding: clamp(2rem, 3.5vw, 3rem);

  /* ── Effects ─────────────────────────────────────────────────────────────── */

  /* Border Radius */
  --radius-sm:    4px;
  --radius-md:    8px;
  --radius-lg:    12px;
  --radius-xl:    20px;
  --radius-full:  9999px;

  /* Shadows — professional, subtle */
  --shadow-sm:    0 1px 3px rgba(10, 22, 40, 0.06), 0 1px 2px rgba(10, 22, 40, 0.04);
  --shadow-md:    0 4px 12px rgba(10, 22, 40, 0.08), 0 2px 4px rgba(10, 22, 40, 0.05);
  --shadow-lg:    0 8px 24px rgba(10, 22, 40, 0.1), 0 4px 8px rgba(10, 22, 40, 0.06);
  --shadow-xl:    0 16px 48px rgba(10, 22, 40, 0.12);
  --shadow-card:  0 2px 8px rgba(10, 22, 40, 0.06), 0 0 0 1px rgba(10, 22, 40, 0.04);
  --shadow-card-hover: 0 8px 24px rgba(10, 22, 40, 0.1), 0 0 0 1px #E2E8F0;
  --shadow-blue:  0 4px 14px rgba(21, 112, 239, 0.25);
  --shadow-glow:  none;  /* No glow on enterprise light mode */

  /* Transitions */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:   cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast:  150ms;
  --duration-base:  250ms;
  --duration-slow:  400ms;
  --duration-slower:600ms;

  /* Blur */
  --blur-sm:    8px;
  --blur-md:    16px;
  --blur-lg:    24px;
}