/* Layout utilities. Uses only tokens from tokens.css. */

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

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

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.section--soft { background: var(--color-soft-gray); }

.section--dark {
  color: var(--color-white);
  background: var(--color-charcoal);
}

/* Vertical rhythm for direct children. Resets child margins so spacing is not doubled. */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-space, var(--space-4));
}

.stack > * { margin-block: 0; }

/* Any dark surface: white text and a white focus ring (approved focus treatment). */
.on-dark {
  color: var(--color-white);
}

.on-dark :focus-visible,
.on-dark:focus-visible {
  outline-color: var(--color-focus-on-dark);
}

/* ---------- Buttons (shared across the whole site) ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 2.75rem;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-decoration: none;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.btn--primary {
  color: var(--color-white);
  background: var(--color-ink);
}

.btn--primary:hover { background: var(--color-charcoal); }

.btn--secondary {
  color: var(--color-ink);
  background: transparent;
  border-color: var(--color-graphite);
}

.btn--secondary:hover { background: var(--color-soft-gray); }

.on-dark .btn--secondary {
  color: var(--color-white);
  border-color: var(--color-gray);
}

.on-dark .btn--secondary:hover { background: var(--color-charcoal); }

/* ---------- Section heading (shared across the whole site) ---------- */

.section-heading {
  max-width: 40rem;
  margin-block-end: var(--space-8);
}

.section-heading__eyebrow {
  display: block;
  margin-block-end: var(--space-2);
  color: var(--color-slate);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.on-dark .section-heading__eyebrow { color: var(--color-gray); }

.section-heading__title { margin-block-end: var(--space-2); }

.section-heading__sub {
  max-width: 42ch;
  color: var(--color-slate);
  font-size: var(--font-size-md);
}

.on-dark .section-heading__sub { color: var(--color-gray); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}