/* ==========================================================================
   Layout: container, header, footer, generic grids
   ========================================================================== */

.container {
  width: 100%;
  max-width: calc(var(--container-width) + 2 * var(--container-gutter));
  margin-inline: auto;
  padding-inline: var(--container-gutter);
}

/* Header -------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgb(255 255 255 / 0.92);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: var(--header-height);
}

/* Main navigation: scrollable row on small screens, no JavaScript needed */
.main-nav {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  mask-image: linear-gradient(to right, #000 85%, transparent);
}

.main-nav::-webkit-scrollbar {
  display: none;
}

.main-nav__list {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-6) var(--space-2) 0;
  list-style: none;
}

.main-nav__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-pill);
}

.main-nav__link:hover {
  text-decoration: underline;
}

@media (min-width: 48em) {
  .main-nav {
    overflow: visible;
    mask-image: none;
  }

  .main-nav__list {
    justify-content: flex-end;
    padding-right: 0;
  }
}

/* Footer -------------------------------------------------------------- */

.site-footer {
  padding-top: var(--space-12);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  background: var(--color-surface-tinted);
  border-top: 1px solid var(--color-border);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-8);
}

.site-footer__brand p {
  max-width: 22rem;
  margin-top: var(--space-3);
}

.site-footer__title {
  margin-bottom: var(--space-3);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2) var(--space-6);
  margin-top: var(--space-10);
  padding-block: var(--space-6);
  /* divider aligned with the content, not with the container padding */
  background: linear-gradient(var(--color-border), var(--color-border)) top center / calc(100% - 2 * var(--container-gutter)) 1px no-repeat;
}

@media (min-width: 40em) {
  .site-footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64em) {
  .site-footer__inner {
    grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr));
  }
}

/* Split: text next to media ------------------------------------------- */

.split {
  display: grid;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 52em) {
  .split {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-16);
  }
}

/* Grids --------------------------------------------------------------- */

.card-grid,
.info-grid,
.tile-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.tile-grid {
  padding: 0;
  list-style: none;
}

@media (min-width: 40em) {
  .info-grid,
  .card-grid--two,
  .tile-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 60em) {
  .card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .card-grid--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tile-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}