/**
 * Global Styles
 * 
 * Global layout utilities, container classes, and base styles.
 * Uses CSS Grid and Flexbox only - no layout hacks.
 */

/* Root Element */
html {
  font-size: 16px;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  overflow-x: hidden;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-wide {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-narrow {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Section Spacing */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-sm {
  padding: var(--spacing-2xl) 0;
}

.section-lg {
  padding: calc(var(--spacing-3xl) * 1.5) 0;
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

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

.flex-row {
  flex-direction: row;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-start {
  justify-content: flex-start;
}

.justify-end {
  justify-content: flex-end;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

.gap-xl {
  gap: var(--spacing-xl);
}

/* Grid Utilities */
.grid {
  display: grid;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.gap-grid-sm {
  gap: var(--spacing-sm);
}

.gap-grid-md {
  gap: var(--spacing-md);
}

.gap-grid-lg {
  gap: var(--spacing-lg);
}

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

/* Spacing Utilities */
.mt-auto {
  margin-top: auto;
}

.mb-auto {
  margin-bottom: auto;
}

.ml-auto {
  margin-left: auto;
}

.mr-auto {
  margin-right: auto;
}

/* Display Utilities */
.hidden {
  display: none;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

/* Responsive Utilities */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .container-wide,
  .container-narrow {
    padding: 0 var(--spacing-md);
  }
  
  .grid-cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  
  .gap-xl {
    gap: var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .container-wide,
  .container-narrow {
    padding: 0 var(--spacing-md);
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .section-sm {
    padding: var(--spacing-xl) 0;
  }
  
  .section-lg {
    padding: var(--spacing-3xl) 0;
  }
  
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
  
  .grid-cols-2 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
  
  .gap-xl {
    gap: var(--spacing-md);
  }
  
  .gap-lg {
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .section-lg {
    padding: var(--spacing-2xl) 0;
  }
}

/* Focus Styles for Accessibility - WCAG 2.1 AA Compliant */
*:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Enhanced focus states for interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

/* Focus states for navigation links */
.nav__link:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* Focus states for form inputs */
input[type="text"]:focus-visible,
input[type="email"]:focus-visible,
input[type="tel"]:focus-visible,
input[type="number"]:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
  border-color: var(--color-accent-primary);
}

/* Smooth Scrolling */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}