/* Layout Utilities & Responsive Breakpoints
   Mobile-first approach starting at 320px.
   Provides grid/flexbox utilities, container, section padding,
   and responsive media queries for sm/md/lg/xl/2xl breakpoints.

   Breakpoints:
   - Default: 320px+ (mobile)
   - sm: 576px+
   - md: 768px+ (tablet — nav breakpoint)
   - lg: 1024px+ (desktop)
   - xl: 1440px+ (large desktop)
   - 2xl: 2560px (max supported)
*/

/* ============================================
   Container
   ============================================ */

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

/* ============================================
   Section Padding Utilities
   ============================================ */

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

.section--sm {
  padding-block: var(--space-md);
}

.section--lg {
  padding-block: var(--space-xl);
}

/* ============================================
   Grid Utilities
   ============================================ */

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

/* Single column by default (mobile) */
.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
}

/* ============================================
   Flex Utilities
   ============================================ */

.flex {
  display: flex;
}

.flex-wrap {
  flex-wrap: wrap;
}

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

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

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

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

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

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

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

.gap-xs {
  gap: var(--space-xs);
}

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

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

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

/* ============================================
   Text alignment utilities
   ============================================ */

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

.u-center {
  text-align: center;
}

/* Dark section band (replaces repeated inline background/colour pairs).
   A dark panel in both modes, so pin to literals with light text. */
.section--dark {
  background-color: #1A1A2E;
  color: #FFFFFF;
}

.section--dark :is(h1, h2, h3, h4, h5, h6) {
  color: #FFFFFF;
}

.section--dark p {
  color: #E5E7EB;
}

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

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

/* ============================================
   Responsive Media Queries
   ============================================ */

/* sm: 576px+ */
@media (min-width: 576px) {
  .container {
    padding-inline: var(--space-md);
  }

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

/* md: 768px+ (tablet — nav breakpoint) */
@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* lg: 1024px+ (desktop) */
@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

/* xl: 1440px+ (large desktop) */
@media (min-width: 1440px) {
  .container {
    padding-inline: var(--space-lg);
  }
}

/* 2xl: 2560px (max supported width) */
@media (min-width: 2560px) {
  .container {
    max-width: 1600px;
  }
}