/* ==========================================================================
   ITESIWAJU DIGITAL PLATFORM — BASE
   Reset, document defaults, typography, layout primitives, utilities.
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--space-6));
}

body {
  font-family: var(--font-sans);
  font-size: var(--type-body);
  line-height: var(--leading-normal);
  color: var(--colour-text-primary);
  background: var(--colour-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, picture, svg, video { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
p, li, figcaption { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; }

/* ---------- Typography ---------- */
h1, .t-h1 { font-size: var(--type-h1); line-height: var(--leading-tight); letter-spacing: var(--tracking-tight); font-weight: var(--weight-bold); }
h2, .t-h2 { font-size: var(--type-h2); line-height: var(--leading-snug); letter-spacing: var(--tracking-tight); font-weight: var(--weight-bold); }
h3, .t-h3 { font-size: var(--type-h3); line-height: var(--leading-snug); font-weight: var(--weight-semibold); }
h4, .t-h4 { font-size: var(--type-h4); line-height: var(--leading-snug); font-weight: var(--weight-semibold); }
.t-display { font-size: var(--type-display); line-height: var(--leading-tight); letter-spacing: var(--tracking-tight); font-weight: var(--weight-bold); }
.t-lead { font-size: var(--type-body-lg); line-height: var(--leading-relaxed); color: var(--colour-text-secondary); }
.t-small { font-size: var(--type-body-sm); }
.t-caption { font-size: var(--type-caption); color: var(--colour-text-muted); }
.t-label {
  font-size: var(--type-label); font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-label); text-transform: uppercase;
  color: var(--colour-brand-accent-dark);
}
.t-serif { font-family: var(--font-serif); }
.t-muted { color: var(--colour-text-muted); }
.t-inverse { color: var(--colour-text-inverse); }

a { color: var(--colour-text-link); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { color: var(--colour-text-link-hover); }

/* ---------- Focus ---------- */
:focus-visible {
  outline: 3px solid var(--colour-border-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
.skip-link {
  position: absolute; left: var(--space-4); top: var(--space-2);
  transform: translateY(-160%);
  background: var(--colour-brand-primary); color: var(--colour-text-on-brand);
  padding: var(--space-3) var(--space-5); border-radius: var(--radius-md);
  font-weight: var(--weight-semibold); z-index: var(--z-toast);
  transition: transform var(--duration-fast) var(--ease-standard);
}
.skip-link:focus { transform: translateY(0); color: var(--colour-text-on-brand); }

/* ---------- Layout primitives ---------- */
.container { width: 100%; max-width: var(--container-default); margin-inline: auto; padding-inline: var(--page-padding); }
.container--narrow { max-width: var(--container-narrow); }
.container--wide { max-width: var(--container-wide); }
.container--full { max-width: none; }

.section { padding-block: var(--space-16); }
.section--tight { padding-block: var(--space-12); }
.section--loose { padding-block: var(--space-20); }
.section--brand { background: var(--colour-brand-primary); color: var(--colour-text-inverse); }
.section--deep { background: var(--gradient-brand); color: var(--colour-text-inverse); }
.section--subtle { background: var(--colour-background-subtle); }
.section--sunken { background: var(--colour-surface-sunken); }
.section--brand a, .section--deep a { color: #fff; }

@media (min-width: 1024px) {
  .section { padding-block: var(--space-24); }
  .section--tight { padding-block: var(--space-16); }
}

.stack > * + * { margin-top: var(--space-4); }
.stack-6 > * + * { margin-top: var(--space-6); }
.stack-8 > * + * { margin-top: var(--space-8); }

.grid { display: grid; gap: var(--grid-gutter); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }
@media (min-width: 768px) {
  .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-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.split { display: grid; gap: var(--space-10); align-items: start; }
@media (min-width: 1024px) { .split { grid-template-columns: 1.15fr .85fr; gap: var(--space-16); } }
.split--sidebar { }
@media (min-width: 1024px) { .split--sidebar { grid-template-columns: 17rem 1fr; gap: var(--space-12); } }

.prose { max-width: var(--container-narrow); }
.prose h2 { margin-top: var(--space-12); margin-bottom: var(--space-4); }
.prose h3 { margin-top: var(--space-8); margin-bottom: var(--space-3); }
.prose p + p { margin-top: var(--space-4); }
.prose ul, .prose ol { margin-top: var(--space-4); padding-left: var(--space-6); }
.prose li + li { margin-top: var(--space-2); }
.prose > p { color: var(--colour-text-secondary); }

.flow-between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }
.text-centre { text-align: center; }
.mt-0{margin-top:0}.mt-2{margin-top:var(--space-2)}.mt-3{margin-top:var(--space-3)}
.mt-4{margin-top:var(--space-4)}.mt-6{margin-top:var(--space-6)}.mt-8{margin-top:var(--space-8)}
.mt-10{margin-top:var(--space-10)}.mt-12{margin-top:var(--space-12)}
.mb-4{margin-bottom:var(--space-4)}.mb-6{margin-bottom:var(--space-6)}.mb-8{margin-bottom:var(--space-8)}

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

main { flex: 1 0 auto; }
.rule { border: 0; border-top: 1px solid var(--colour-border-subtle); margin-block: var(--space-10); }
.rule--accent { border-top: 2px solid var(--colour-brand-accent); width: 3.5rem; margin-block: var(--space-5); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Print ---------- */
@media print {
  .site-utility, .site-header, .site-footer, .to-top, .cta-band { display: none !important; }
  body { color: #000; background: #fff; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: .75em; }
  .section { padding-block: var(--space-6); }
}