/**
 * TISIT Design System v1.0
 * Modern, mobile-first utility classes and design tokens
 *
 * Table of Contents:
 * 1. Layout Utilities
 * 2. Spacing Utilities
 * 3. Typography Utilities
 * 4. Color Utilities
 * 5. Border Utilities
 * 6. Shadow Utilities
 * 7. Responsive Utilities
 */

/* ========================================
   1. Layout Utilities
   ======================================== */

/* Flexbox utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

/* Flex alignment */
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

/* Flex grow/shrink */
.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-initial { flex: 0 1 auto; }
.flex-none { flex: none; }

/* 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-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Container utilities */
.container-fluid { width: 100%; padding: 0 var(--spacing-md); }
.container-sm { max-width: 640px; margin: 0 auto; padding: 0 var(--spacing-md); }
.container-md { max-width: 768px; margin: 0 auto; padding: 0 var(--spacing-md); }
.container-lg { max-width: 1024px; margin: 0 auto; padding: 0 var(--spacing-md); }
.container-xl { max-width: 1280px; margin: 0 auto; padding: 0 var(--spacing-md); }

/* Position utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Display utilities */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* Overflow utilities */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-scroll { overflow: scroll; }

/* ========================================
   2. Spacing Utilities
   ======================================== */

/* Margin utilities */
.m-0 { margin: 0; }
.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.ml-0 { margin-left: 0; }
.ml-xs { margin-left: var(--spacing-xs); }
.ml-sm { margin-left: var(--spacing-sm); }
.ml-md { margin-left: var(--spacing-md); }
.ml-lg { margin-left: var(--spacing-lg); }
.ml-xl { margin-left: var(--spacing-xl); }

.mr-0 { margin-right: 0; }
.mr-xs { margin-right: var(--spacing-xs); }
.mr-sm { margin-right: var(--spacing-sm); }
.mr-md { margin-right: var(--spacing-md); }
.mr-lg { margin-right: var(--spacing-lg); }
.mr-xl { margin-right: var(--spacing-xl); }

.mx-auto { margin-left: auto; margin-right: auto; }

/* Padding utilities */
.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-xs { padding-top: var(--spacing-xs); }
.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }
.pt-xl { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-xs { padding-bottom: var(--spacing-xs); }
.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }
.pb-xl { padding-bottom: var(--spacing-xl); }

.pl-0 { padding-left: 0; }
.pl-xs { padding-left: var(--spacing-xs); }
.pl-sm { padding-left: var(--spacing-sm); }
.pl-md { padding-left: var(--spacing-md); }
.pl-lg { padding-left: var(--spacing-lg); }
.pl-xl { padding-left: var(--spacing-xl); }

.pr-0 { padding-right: 0; }
.pr-xs { padding-right: var(--spacing-xs); }
.pr-sm { padding-right: var(--spacing-sm); }
.pr-md { padding-right: var(--spacing-md); }
.pr-lg { padding-right: var(--spacing-lg); }
.pr-xl { padding-right: var(--spacing-xl); }

/* ========================================
   3. Typography Utilities
   ======================================== */

/* Font size */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

/* Font weight */
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Text alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text transform */
.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }
.normal-case { text-transform: none; }

/* Text decoration */
.underline { text-decoration: underline; }
.no-underline { text-decoration: none; }
.line-through { text-decoration: line-through; }

/* Line clamping for truncation */
.line-clamp-1 {
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.line-clamp-2 {
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.line-clamp-3 {
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ========================================
   4. Color Utilities
   ======================================== */

/* Text colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-inverse { color: var(--text-inverse); }

.text-brand { color: var(--primary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-info { color: var(--info); }

/* Background colors */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-tertiary { background-color: var(--bg-tertiary); }

.bg-brand { background-color: var(--primary); }
.bg-brand-light { background-color: var(--primary-light); }
.bg-success { background-color: var(--success); }
.bg-warning { background-color: var(--warning); }
.bg-danger { background-color: var(--danger); }
.bg-info { background-color: var(--info); }

.bg-transparent { background-color: transparent; }

/* ========================================
   5. Border Utilities
   ======================================== */

/* Border width */
.border { border: 1px solid var(--border-color); }
.border-0 { border: none; }
.border-t { border-top: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }
.border-l { border-left: 1px solid var(--border-color); }
.border-r { border-right: 1px solid var(--border-color); }

/* Border radius */
.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: 9999px; }

/* ========================================
   6. Shadow Utilities
   ======================================== */

.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* ========================================
   7. Responsive Utilities
   ======================================== */

/* Mobile-first breakpoints */

/* Tablet and up (768px+) */
@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:flex-row { flex-direction: row; }
  .md\:hidden { display: none; }
  .md\:block { display: block; }
  .md\:text-left { text-align: left; }
  .md\:text-lg { font-size: var(--font-size-lg); }
  .md\:px-xl { padding-left: var(--spacing-xl); padding-right: var(--spacing-xl); }
}

/* Desktop and up (1024px+) */
@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:hidden { display: none; }
  .lg\:block { display: block; }
  .lg\:text-xl { font-size: var(--font-size-xl); }
}

/* Mobile only utilities */
@media (max-width: 767px) {
  .mobile-only { display: block; }
  .mobile-hidden { display: none; }
}

/* Tablet only utilities */
@media (min-width: 768px) and (max-width: 1023px) {
  .tablet-only { display: block; }
}

/* Desktop only utilities */
@media (min-width: 1024px) {
  .desktop-only { display: block; }
}

/* ========================================
   8. Interaction Utilities
   ======================================== */

.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }
.cursor-not-allowed { cursor: not-allowed; }

.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }

/* Transitions */
.transition-all { transition: var(--transition-base); }
.transition-fast { transition: var(--transition-fast); }
.transition-slow { transition: var(--transition-slow); }

/* Hover effects */
.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.hover-scale:hover {
  transform: scale(1.05);
}

/* ========================================
   9. Width and Height Utilities
   ======================================== */

.w-full { width: 100%; }
.w-auto { width: auto; }
.w-screen { width: 100vw; }

.h-full { height: 100%; }
.h-auto { height: auto; }
.h-screen { height: 100vh; }

.min-h-screen { min-height: 100vh; }

/* ========================================
   10. Z-Index Utilities
   ======================================== */

.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }
.z-auto { z-index: auto; }

/* ========================================
   11. Accessibility Utilities
   ======================================== */

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

/* Focus visible for keyboard navigation */
.focus-ring:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}