/* Layout primitives & utilities */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: calc(var(--container-narrow) + var(--gutter) * 2); }

.section { padding-block: var(--section-y); }
.section--alt { background: var(--color-bg-alt); }
.section--dark {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse-muted);
}
.section--dark :is(h1, h2, h3, h4) { color: var(--white); }
.section--tight { padding-block: calc(var(--section-y) * 0.6); }

.section-head {
  display: grid;
  gap: var(--space-4);
  max-width: 760px;
  margin-bottom: var(--space-7);
}
.section-head--center {
  margin-inline: auto;
  text-align: center;
  justify-items: center;
}
.section-head--split {
  max-width: none;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: var(--space-5);
}
@media (max-width: 720px) {
  .section-head--split { grid-template-columns: 1fr; }
}

.grid { display: grid; gap: var(--space-5); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }

.split {
  display: grid;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .split { grid-template-columns: 1fr 1fr; }
  .split--wide-left { grid-template-columns: 1.2fr 1fr; }
  .split--wide-right { grid-template-columns: 1fr 1.2fr; }
  .split--top { align-items: start; }
}

.stack > * + * { margin-top: var(--space-4); }
.stack-lg > * + * { margin-top: var(--space-6); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 1000;
  padding: var(--space-3) var(--space-4);
  background: var(--ink-900);
  color: var(--white);
  border-radius: var(--radius);
}
.skip-link:focus { top: var(--space-4); }

/* Rounded image frame used across pages */
.media-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-100);
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame--accent::after {
  /* Slanted red tab on the corner — brand signature */
  content: "";
  position: absolute;
  left: 1.25rem;
  bottom: 0;
  width: 5rem;
  height: 0.5rem;
  background: var(--color-accent);
  transform: skewX(var(--slant));
}

/* Scroll-reveal (enabled by main.js; content visible without JS) */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }