/* ================================
   MeshMerchant Design System
   ================================ */

/* CSS Variables - Design Tokens */
:root {
  /* Brand Colors */
  --color-primary-blue: #129ed9;
  --color-primary-purple: #a474eb;
  --color-gradient: linear-gradient(135deg, #129ed9 0%, #a474eb 100%);
  
  /* Neutral Colors */
  --color-background: #fafbfc;
  --color-surface: #ffffff;
  --color-text-primary: #1a1a2e;
  --color-text-secondary: #64748b;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  
  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(18, 158, 217, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(18, 158, 217, 0.08), 0 2px 4px -1px rgba(18, 158, 217, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(18, 158, 217, 0.1), 0 4px 6px -2px rgba(18, 158, 217, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(18, 158, 217, 0.1), 0 10px 10px -5px rgba(18, 158, 217, 0.04);
  
  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Typography */
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body-adjust: 0.52;
  --font-heading-adjust: 0.52;
  
  /* Font Sizes */
  --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;
  
  /* Font Weights */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Layout */
  --container-width: 1280px;
  --container-padding: 2rem;
  --header-height: 64px;
}

/* ================================
   Reset & Base Styles
   ================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-size-adjust: var(--font-body-adjust);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ================================
   Typography
   ================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-size-adjust: var(--font-heading-adjust);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--text-5xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-4xl);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--text-3xl);
}

h4 {
  font-size: var(--text-2xl);
}

h5 {
  font-size: var(--text-xl);
}

h6 {
  font-size: var(--text-lg);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

a {
  color: var(--color-primary-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-purple);
}

strong {
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

/* ================================
   Layout Utilities
   ================================ */

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.section {
  padding: var(--space-4xl) 0;
}

.section-sm {
  padding: var(--space-3xl) 0;
}

.section-lg {
  padding: 6rem 0;
}

/* ================================
   Grid System
   ================================ */

.grid {
  display: grid;
  gap: var(--space-xl);
}

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

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

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

/* ================================
   Flexbox Utilities
   ================================ */

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* ================================
   Text Utilities
   ================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-gradient {
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-large {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.text-muted {
  color: var(--color-text-secondary);
}

/* ================================
   Responsive Typography
   ================================ */

@media (max-width: 768px) {
  :root {
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
    --container-padding: 1.5rem;
  }
  
  .section {
    padding: var(--space-3xl) 0;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --text-5xl: 1.875rem;
    --text-4xl: 1.5rem;
    --container-padding: 1rem;
  }
}