/* Component: Grid Overlay
 *
 * Responsive grid overlay (mobile-first)
 *
 * Breakpoints (min-width):
 * default (375–699)   — mobile:   3 cols,  margin 20px,  gutter 20px
 * 700px   (700–1199)  — tablet:   6 cols,  margin 60px,  gutter 20px
 * 1200px  (1200–1439) — desktop:  12 cols, margin 60px,  gutter 20px
 * 1440px  (1440+)     — desktop:  12 cols, margin 120px, gutter 20px
 *
 * Color: #FF0000 10%
 */

/* Default: 375px — 3 columns */
.grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding-left: 20px;
  padding-right: 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  pointer-events: none;
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
}

.grid-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

.grid-overlay__column {
  background: rgba(255, 0, 0, 0.1);
  height: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 8px;
}

/* Hide columns 4–12 on mobile */
.grid-overlay__column:nth-child(n+4) {
  display: none;
}

.grid-overlay__label {
  font-family: monospace;
  font-size: 10px;
  line-height: 1;
  color: rgba(255, 0, 0, 0.4);
  user-select: none;
}

/* 700px — tablet: 6 columns, margin 60px */
@media (min-width: 700px) {
  .grid-overlay {
    padding-left: 60px;
    padding-right: 60px;
    grid-template-columns: repeat(6, 1fr);
  }

  .grid-overlay__column:nth-child(n+4) {
    display: flex;
  }

  .grid-overlay__column:nth-child(n+7) {
    display: none;
  }
}

/* 1200px — desktop: 12 columns, margin 60px */
@media (min-width: 1200px) {
  .grid-overlay {
    grid-template-columns: repeat(12, 1fr);
  }

  .grid-overlay__column:nth-child(n+7) {
    display: flex;
  }
}

/* 1440px — desktop: 12 columns, margin 120px */
@media (min-width: 1440px) {
  .grid-overlay {
    padding-left: 120px;
    padding-right: 120px;
  }
}

/* Toggle button */
.grid-toggle {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 9999;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.06);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.grid-toggle:hover {
  background: rgba(0, 0, 0, 0.12);
}

.grid-toggle.is-active {
  background: rgba(255, 0, 0, 0.1);
}

.grid-toggle svg {
  width: 20px;
  height: 20px;
}

.grid-toggle svg line {
  stroke: rgba(0, 0, 0, 0.7);
  stroke-width: 1;
}

.grid-toggle.is-active svg line {
  stroke: rgba(255, 0, 0, 0.6);
}