/**
 * Theme T&B — responsive framework (mobile-first).
 *
 * @package Theme_TB
 * @since 1.0.0
 */

/* Base: mobile (320px+) */
:root {
  --tb-gutter: var(--tb-space-md);
}

main[role="main"]:not(.tb-homepage) {
  width: min(100% - (var(--tb-gutter) * 2), var(--tb-container-max));
}

/* SM — 576px */
@media (min-width: 576px) {
  :root { --tb-gutter: var(--tb-space-lg); }
  .tb-card-grid,
  .tb-tools-grid,
  .tb-ebooks-grid,
  .tb-blog-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

/* MD — 768px */
@media (min-width: 768px) {
  .tb-section-header {
    flex-direction: row;
  }
  .tb-card-grid,
  .tb-tools-grid,
  .tb-ebooks-grid,
  .tb-blog-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
}

/* LG — 992px */
@media (min-width: 992px) {
  .tb-card-grid,
  .tb-tools-grid,
  .tb-ebooks-grid,
  .tb-blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .tb-homepage .tb-tools-grid,
  .tb-homepage .tb-ebooks-grid,
  .tb-homepage .tb-blog-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
}

/* XL — 1200px */
@media (min-width: 1200px) {
  .tb-card-grid,
  .tb-tools-grid,
  .tb-ebooks-grid,
  .tb-blog-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .tb-homepage .tb-tools-grid,
  .tb-homepage .tb-ebooks-grid,
  .tb-homepage .tb-blog-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

/* XXL — 1440px */
@media (min-width: 1440px) {
  :root { --tb-container-max: 1320px; }
}

/* Ultra-wide — 1920px */
@media (min-width: 1920px) {
  :root { --tb-container-max: 1440px; }
}