/* ==========================================================================
   layout.css - containers, sections, grid
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide { max-width: var(--container-wide); }

.section {
  position: relative;
  padding-block: clamp(64px, 8vw, 140px);
}
/* offset anchored sections so the sticky nav doesn't cover headings */
:where(section[id], main[id]) { scroll-margin-top: 88px; }
.section--tight { padding-block: clamp(48px, 5vw, 88px); }
.section--light { background: var(--paper); color: var(--text-ink); }
.section--panel { background: var(--ink-850); }
.section--steel {
  background:
    radial-gradient(120% 80% at 80% 0%, rgba(61,90,128,.18), transparent 60%),
    var(--ink-850);
}

.section__head {
  max-width: 760px;
  margin-bottom: clamp(32px, 4vw, 64px);
}
.section__head--center { margin-inline: auto; text-align: center; }
.section__title { margin-top: var(--s-3); }
.section__lead {
  margin-top: var(--s-4);
  font-size: var(--fs-lead);
  color: var(--text-mut);
  max-width: 60ch;
}
.section--light .section__lead { color: var(--text-ink-mut); }
.section--light .eyebrow { color: var(--steel-500); }

/* grid helpers */
.grid { display: grid; gap: var(--s-5); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
}
.split--wide-left { grid-template-columns: 1.15fr .85fr; }

.stack > * + * { margin-top: var(--s-4); }
.stack-lg > * + * { margin-top: var(--s-6); }

.hairline { height: 1px; background: var(--line); border: 0; }

@media (max-width: 900px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .split, .split--wide-left { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
}