/* ═══════════════════════════════════════════════
   Layout  -  Container, Grid, Section
   ═══════════════════════════════════════════════ */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(24px, 5vw, 80px);
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 clamp(24px, 5vw, 80px);
}

/* ── Main content sits above the schematic grid overlay ── */
main {
  position: relative;
  z-index: var(--z-content);
}

/* ── Page Header  -  first section on interior pages, clears fixed nav ── */
.page-header {
  padding-top: 160px;
}

/* ── Sections ── */
section {
  position: relative;
  padding: var(--space-3xl) 0;
  border-top: 1px solid var(--border);
}

section:first-of-type {
  border-top: none;
}

/* ── Grid Utilities ── */
.grid {
  display: grid;
  gap: 32px;
}

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

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

@media (max-width: 1024px) {
  section { padding: var(--space-2xl) 0; }
}

@media (max-width: 768px) {
  section { padding: var(--space-xl) 0; }
  .grid-4,
  .grid-3,
  .grid-2 { grid-template-columns: 1fr; }
}

/* ── Mobile-specific spacing (375px) ── */
/* Tighter padding on small phones for more content visibility */
@media (max-width: 375px) {
  section { padding: var(--space-lg) 0; }
  .container,
  .container-narrow { padding: 0 16px; }
  .grid { gap: 20px; }

  /* Tool cards  -  ensure clean stacking at 375px */
  .grid-2 {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Card padding optimization for small screens */
  .card--panel {
    padding: var(--space-md);
  }

  .card--document {
    padding: var(--space-md);
  }

  /* Tool result cards  -  tighter on mobile */
  .tool-result {
    padding: var(--space-md);
  }

  /* Form spacing tighter */
  .form-group {
    margin-bottom: var(--space-sm);
  }

  /* Card typography  -  better readability on small phones */
  .card-title,
  .tool-card h3,
  .card--panel h3 {
    font-size: 1rem;
    line-height: 1.3;
  }

  .card-desc,
  .tool-card p,
  .card--panel p {
    font-size: 0.875rem;
    line-height: 1.5;
  }

  /* Stats bar  -  stack on very small screens */
  .credibility-banner {
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-md);
  }

  .credibility-stat {
    min-width: auto;
    width: 100%;
    text-align: center;
  }
}

/* ── Flex Utilities ── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* ── Spacing Utilities ── */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* ── Text Alignment ── */
.text-center { text-align: center; }
.text-left { text-align: left; }
.max-w-sm { max-width: 480px; }
.max-w-md { max-width: 640px; }
.max-w-lg { max-width: 800px; }
.mx-auto { margin-left: auto; margin-right: auto; }