/* ============================================
   VENDOR RESOLUTION SERVICES
   Design System — CSS Variables
   ============================================ */

:root {
  /* Color Palette — White Enterprise */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8f9fb;
  --color-bg-tertiary: #f0f2f6;
  --color-bg-elevated: #ffffff;
  --color-bg-card: #ffffff;
  --color-bg-glass: rgba(255, 255, 255, 0.92);

  /* Primary — VRS Blue */
  --color-accent-primary: #2A4778;
  --color-accent-secondary: #1e3560;
  --color-accent-muted: rgba(42, 71, 120, 0.08);
  --color-accent-glow: rgba(42, 71, 120, 0.06);

  /* Text */
  --color-text-primary: #1a1a2e;
  --color-text-secondary: #4a4a5a;
  --color-text-tertiary: #6b6b7b;
  --color-text-muted: #8a8a9a;

  /* Borders & Dividers */
  --color-border: rgba(42, 71, 120, 0.10);
  --color-border-strong: rgba(42, 71, 120, 0.18);
  --color-border-accent: rgba(42, 71, 120, 0.25);

  /* Status */
  --color-success: #16a34a;
  --color-warning: #d97706;
  --color-error: #dc2626;
  --color-info: #2563eb;

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

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --leading-tight: 1.2;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;

  /* 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 */
  --max-width: 1280px;
  --header-height: 72px;
  --section-padding: var(--space-24);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(42, 71, 120, 0.06);
  --shadow-md: 0 4px 12px rgba(42, 71, 120, 0.08);
  --shadow-lg: 0 8px 30px rgba(42, 71, 120, 0.10);
  --shadow-glow: 0 0 40px rgba(42, 71, 120, 0.06);

  /* 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-slower: 600ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index Scale */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-toast: 600;
}

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
}

::selection {
  background: var(--color-accent-muted);
  color: var(--color-accent-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* Typography Utilities */
.text-gradient {
  background: linear-gradient(135deg, var(--color-accent-primary), #4a6fa5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-subtle {
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent-primary);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-12);
  }
}

/* Section Base */
.section {
  position: relative;
  padding: var(--section-padding) 0;
}

.section-sm {
  padding: var(--space-16) 0;
}

.section-lg {
  padding: var(--space-32) 0;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Flex */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Spacing Utilities */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

/* Visibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus States */
:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

/* Link Reset */
a {
  color: inherit;
  text-decoration: none;
}

/* Image Reset */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Button Reset */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Input Reset */
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}