/* ==========================================================================
   BASE — reset, typography, layout primitives
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body {
  max-width: 100%;
  overflow-x: hidden; /* defensive: no single overflowing element can force page-wide horizontal scroll */
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-medium);
  color: var(--kcg-slate);
  background: var(--gradient-canvas);
  background-attachment: fixed;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--kcg-ink);
  font-weight: var(--fw-bold);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-2);
}
h1 { font-size: var(--fs-hero); font-weight: var(--fw-ebold); }
h2 { font-size: var(--fs-h1); }
h3 { font-size: var(--fs-h2); }
h4 { font-size: var(--fs-h4); }
p  { margin: 0 0 var(--space-2); }
a  { color: inherit; text-decoration: none; }

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

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.section { padding: var(--space-7) 0; }
.section-tight { padding: var(--space-5) 0; }

.text-center { text-align: center; }
.text-muted { color: var(--kcg-muted); }

.grid {
  display: grid;
  gap: var(--space-3);
}
.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: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Focus visibility — accessibility floor */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--kcg-indigo);
  outline-offset: 3px;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}