/* ==========================================================================
   ImpactPlus v2.0 — Base (reset, elements, typography, layout utilities)
   ========================================================================== */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: var(--lh-body);
  color: var(--ink-2);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'cv11', 'ss01';
}

img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: var(--ip-blue); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--ip-blue-deep); }
button { font: inherit; cursor: pointer; }
ul, ol { padding: 0; list-style: none; }
strong, b { font-weight: var(--fw-semibold); color: var(--ink); }

:focus-visible { outline: none; box-shadow: var(--shadow-focus); border-radius: var(--r-btn); }

/* ---- Headings (Inter by default; --font-display swappable to serif) ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: var(--lh-heading);
  letter-spacing: -0.02em;
  text-wrap: balance;
}
h1 { font-size: var(--t-h1); font-weight: var(--fw-black); line-height: var(--lh-tight); letter-spacing: -0.03em; }
h2 { font-size: var(--t-h2); font-weight: var(--fw-bold); }
h3 { font-size: var(--t-h3); font-weight: var(--fw-bold); }
h4 { font-size: var(--t-subhead); font-weight: var(--fw-semibold); letter-spacing: -0.01em; }
p  { color: var(--muted); max-width: 68ch; }

/* ---- Reusable type helpers ---- */
.eyebrow {
  font-size: var(--t-eyebrow);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ip-teal-deep);
  margin: 0 0 var(--s-12);
  display: inline-block;
}
.display { font-size: var(--t-display); font-weight: var(--fw-black); line-height: var(--lh-tight); letter-spacing: -0.03em; color: var(--ink); }
.lede { font-size: var(--t-body-lg); color: var(--muted); line-height: var(--lh-body); }
.caption { font-size: var(--t-caption); color: var(--muted-2); }
.text-teal { color: var(--ip-teal-deep); }
.text-blue { color: var(--ip-blue); }

/* ---- Layout ---- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad-x); }
.wrap-prose { max-width: var(--maxw-prose); margin: 0 auto; padding-inline: var(--pad-x); }
.section { padding-block: var(--gap-section); }
.section--tight { padding-block: var(--s-64); }
.section--alt { background: var(--canvas-alt); }
.section--dark {
  background: var(--navy-grad);
  color: var(--on-dark);
}
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4,
.hero--dark h1, .hero--dark h2, .hero--dark h3, .hero--dark h4 { color: var(--on-dark); }
.section--dark p, .section--dark .lede,
.hero--dark p, .hero--dark .lede { color: var(--on-dark-muted); }
.section--dark .eyebrow, .hero--dark .eyebrow { color: #7fdfe4; }

/* grid helpers */
.grid { display: grid; gap: var(--s-24); }
@media (min-width: 760px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .split  { grid-template-columns: 1fr 1fr; align-items: center; gap: var(--s-64); }
}
.stack   { display: flex; flex-direction: column; }
.stack-8  { gap: var(--s-8); }
.stack-16 { gap: var(--s-16); }
.stack-24 { gap: var(--s-24); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-12); }
.center  { text-align: center; }
.center-x { margin-inline: auto; }

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

/* scroll-reveal (respects reduced-motion via token) */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }