/* -----------------------------------------
   Layout primitives: container, grid, section rhythm
----------------------------------------- */

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-2);
}

@media (min-width: 600px) {
  .container {
    padding-inline: var(--space-3);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-5);
  }
}

/* Section rhythm */
.section {
  padding-block: var(--space-7);
}

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

.section__header {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
  margin-bottom: var(--space-6);
}

.section__header.section__header--left {
  margin-inline: 0;
  text-align: left;
}

.section__subtitle {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--fs-body-lg);
}

.eyebrow {
  display: inline-block;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

/* Grid utilities — mobile-first, collapse column counts as space grows */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: repeat(2, 1fr); }

@media (min-width: 600px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Visually hidden (a11y-only) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -100px;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  z-index: 1000;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: var(--space-2);
}

/* Scroll-reveal base state (activated by JS adding .is-visible) */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 600ms var(--ease), transform 600ms var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}