app/src/styles/_layout.css

/* ============================================================================ */
/* Layout – 3-column grid (Table of Contents / Article / Aside) */
/* ============================================================================ */

.content-grid {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--content-padding-x);
  margin-top: 40px;
  display: grid;
  grid-template-columns: 220px minmax(0, 680px) 260px;
  gap: 32px;
  align-items: start;
}

.content-grid > main {
  max-width: 100%;
  margin: 0;
  padding: 0;
}

@media (max-width: var(--bp-content-collapse)) {
  .content-grid {
    overflow: hidden;
  }
}


/* Responsive – collapse to single column */
@media (max-width: var(--bp-content-collapse)) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  main > nav:first-of-type {
    display: block;
  }
}


/* ============================================================================ */
/* Width helpers – slightly wider than main column, and full-width to viewport */
/* ---------------------------------------------------------------------------- */

.wide,
.full-width {
  box-sizing: border-box;
  position: relative;
  z-index: var(--z-elevated);
}

.wide {
  /* Target up to ~1100px while staying within viewport minus page gutters */
  width: min(1100px, 100vw - 32px);
  margin-left: calc(50% + var(--content-padding-x) * 2);
  transform: translateX(-50%);
}

.full-width {
  /* Span the full viewport width and center relative to viewport */
  width: 100vw;
  margin-left: calc(50% - 50vw + var(--content-padding-x) * 2);
  margin-right: calc(50% - 50vw);
}

@media (max-width: var(--bp-content-collapse)) {
  .wide,
  .full-width {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    transform: none;
  }
}