/* ── Reset ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

a, button, summary {
  touch-action: manipulation;
}

blockquote {
  margin: 0;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* ── Sections ── */
.section {
  padding: var(--space-16) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

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

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

/* ── Grids ── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

/* ── Flex utilities ── */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

/* ── Text align ── */
.text-center {
  text-align: center;
}

/* ── Spacing ── */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* ── Divider ── */
.divider {
  border: none;
  border-top: 1px solid var(--border-default);
  margin: var(--space-12) 0;
}

/* ── Skip link (a11y) ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-3) var(--space-6);
  background-color: var(--text-primary);
  color: var(--bg-primary);
  font-family: 'Inter', sans-serif;
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  z-index: 100;
}

.skip-link:focus {
  top: var(--space-4);
}

/* ── Breakpoints ── */
@media (min-width: 480px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .section {
    padding: 80px 0;
  }

  .section-sm {
    padding: var(--space-16) 0;
  }
}

@media (min-width: 1024px) {
  .section {
    padding: 120px 0;
  }

  .section-sm {
    padding: 80px 0;
  }

  .hero-title {
    font-size: 64px;
  }
}