/* ==========================================================================
   Layout — containers, section rhythm, grid helpers, typography scale
   ========================================================================== */

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

.container--wide { max-width: var(--width-wide); }
.container--narrow { max-width: var(--width-prose); }

main { display: block; }

.section {
  position: relative;
  padding-block: var(--space-xl);
  overflow-x: clip;
}

.section--tight { padding-block: var(--space-lg); }
.section--compact { padding-block: var(--space-lg); }
.section--flush-top { padding-top: 0; }
.section--flush-bottom { padding-bottom: 0; }

.section--dark {
  background: var(--surface-dark);
  color: var(--text-on-dark);
}

.section--alt { background: var(--surface-alt); }

.section--sunken { background: var(--surface-sunken); }

.section--cta-light {
  background: linear-gradient(180deg, var(--surface-alt), var(--surface-page));
  color: var(--text-primary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-head {
  max-width: 44rem;
  margin-bottom: var(--space-md);
}

.section-head--center { margin-inline: auto; text-align: center; }

.section-head--split {
  max-width: none;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-sm);
}

.section-head--split .section-head-copy { max-width: 40rem; min-width: 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--accent-primary-strong);
  margin-bottom: var(--space-sm);
}

.section--dark .eyebrow,
[data-surface="dark"] .eyebrow { color: var(--color-cyan-300); }

.eyebrow::before {
  content: "";
  width: 1.6em;
  height: 2px;
  background: currentColor;
  border-radius: var(--radius-pill);
}

h1, .h1 { font-size: var(--fs-4xl); }
h2, .h2 { font-size: var(--fs-3xl); }
h3, .h3 { font-size: var(--fs-2xl); }
h4, .h4 { font-size: var(--fs-xl); }
h5, .h5 { font-size: var(--fs-lg); }
h6, .h6 { font-size: var(--fs-md); }

.lede {
  font-size: var(--fs-md);
  line-height: var(--lh-snug);
  color: var(--text-secondary);
  max-width: 60ch;
}

.section--dark .lede,
[data-surface="dark"] .lede { color: var(--text-on-dark-muted); }

.section--cta-light .lede { color: var(--text-secondary); }

.section--compact .lede { margin-bottom: var(--space-sm) !important; }

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

/* ---- Grid helpers ---- */
.grid {
  display: grid;
  gap: var(--space-md);
  align-items: stretch;
}

.grid > * { min-width: 0; }

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(min(100%, 15.5rem), 1fr)); }
.grid--auto-lg { grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr)); }

.grid--asymmetric {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
}

@media (max-width: 68rem) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 46rem) {
  .grid--2,
  .grid--3,
  .grid--4,
  .grid--asymmetric { grid-template-columns: 1fr !important; }
  .section { padding-block: var(--space-lg); }
  .section--tight { padding-block: var(--space-md); }
  .section--compact { padding-block: var(--space-md); }
  .section-head { margin-bottom: var(--space-sm); }
}

.stack { display: flex; flex-direction: column; }
.stack > * + * { margin-top: var(--space-md); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  min-width: 0;
}

.cluster--tight { gap: var(--space-xs); }

.flow > * + * { margin-top: 1em; }

/* ---- Divider ---- */
.rule {
  border: none;
  height: 1px;
  background: var(--border-subtle);
  margin-block: var(--space-lg);
}

.rule--glow {
  height: 1px;
  background: var(--gradient-line);
  border: none;
}

/* ---- Responsive width guards ---- */
.no-overflow-x { overflow-x: hidden; }

@media (max-width: 26rem) {
  :root { --gutter: 1.1rem; }
}