/* ============================================================
   Layout — Container, sections, grid utilities
   ============================================================ */

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

.container--narrow { max-width: var(--container-md); }
.container--wide { max-width: var(--container-2xl); }

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

.section--sm { padding: var(--space-2xl) 0; }
.section--lg { padding: var(--space-5xl) 0; }

.section--alt {
  background-color: var(--bg-secondary);
}

.section--muted {
  background-color: var(--bg-tertiary);
}

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

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

.grid--2-1 { grid-template-columns: 2fr 1fr; }
.grid--1-2 { grid-template-columns: 1fr 2fr; }
.grid--1-1 { grid-template-columns: 1fr 1fr; }

@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: var(--space-3xl) 0; }
  .section--lg { padding: var(--space-4xl) 0; }

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

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .section { padding: var(--space-2xl) 0; }
}

/* --- Flex utilities --- */
.flex { display: flex; }
.flex--center { align-items: center; justify-content: center; }
.flex--between { align-items: center; justify-content: space-between; }
.flex--gap-sm { gap: var(--space-sm); }
.flex--gap-md { gap: var(--space-md); }
.flex--gap-lg { gap: var(--space-lg); }
.flex--wrap { flex-wrap: wrap; }

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

/* --- Max width constraints --- */
.max-w-prose { max-width: 65ch; }
.max-w-narrow { max-width: 540px; }
.max-w-medium { max-width: 720px; }
.max-w-wide { max-width: 960px; }
.mx-auto { margin-left: auto; margin-right: auto; }