/* PMA Science University — base: reset-lite, typography, layout primitives. */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--pma-ivory);
  color: var(--pma-ink);
  font-family: var(--pma-sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}


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

::selection { background: var(--pma-gold-300); color: var(--pma-navy-900); }

/* Headings */
.pma h1, .pma h2, .pma h3, .pma h4,
.pma-display {
  font-family: var(--pma-serif);
  color: var(--pma-navy-900);
  font-weight: 500;
  letter-spacing: 0;
  margin: 0 0 var(--s-4);
}

.pma-display { font-size: var(--fs-display); line-height: 1.06; }
.pma h1 { font-size: var(--fs-h1); line-height: 1.12; }
.pma h2 { font-size: var(--fs-h2); line-height: 1.18; }
.pma h3 { font-size: var(--fs-h3); line-height: 1.25; }

.pma p { margin: 0 0 var(--s-4); max-width: var(--measure); }
.pma p:last-child { margin-bottom: 0; }

.pma-lede {
  font-size: var(--fs-lede);
  line-height: 1.5;
  color: var(--pma-ink-muted);
  max-width: 54ch;
}

.pma-eyebrow {
  font-family: var(--pma-sans);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pma-gold-500);
  margin: 0 0 var(--s-3);
  display: block;
}

.pma-meta { font-size: var(--fs-xs); color: var(--pma-ink-muted); }
.pma-small { font-size: var(--fs-sm); }

/* Links */
.pma a { color: inherit; text-decoration: none; }

.pma-link {
  border-bottom: 1px solid var(--pma-gold-500);
  padding-bottom: 1px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.pma-link:hover { border-bottom-width: 2px; }

/* Layout */
.pma-container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.pma-container--wide { max-width: var(--container-wide); }
.pma-container--prose { max-width: var(--container-prose); }

.pma-section { padding-block: var(--section-y); }
.pma-section--ivory { background: var(--pma-ivory); }
.pma-section--stone { background: var(--pma-stone-100); }
.pma-section--navy { background: var(--pma-navy-900); color: var(--pma-ivory); }
.pma-section--navy h1,
.pma-section--navy h2,
.pma-section--navy h3 { color: var(--pma-ivory); }
.pma-section--navy .pma-lede { color: var(--pma-gold-300); }

.pma-grid { display: grid; gap: var(--s-5); }
.pma-grid--2 { grid-template-columns: repeat(2, 1fr); }
.pma-grid--3 { grid-template-columns: repeat(3, 1fr); }
.pma-split { display: grid; grid-template-columns: 7fr 5fr; gap: var(--s-8); align-items: start; }
.pma-split--8-4 { grid-template-columns: 8fr 4fr; }

.pma-rule { height: 1px; background: var(--pma-stone-300); border: 0; margin-block: var(--s-6); }
.pma-rule--gold { height: 2px; width: 56px; background: var(--pma-gold-500); margin: 0 0 var(--s-5); }

/* Focus — never removed */
.pma :focus-visible,
.pma-skip:focus {
  outline: 2px solid var(--pma-gold-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.pma-skip {
  position: absolute;
  left: var(--s-4);
  top: calc(-1 * var(--s-10));
  z-index: 200;
  background: var(--pma-navy-900);
  color: var(--pma-ivory);
  padding: var(--s-3) var(--s-5);
  font-size: var(--fs-sm);
  transition: top var(--dur) var(--ease);
}
.pma-skip:focus { top: var(--s-4); }

.pma-sr {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* Entrance — one staggered reveal per page, motion-safe */
@media (prefers-reduced-motion: no-preference) {
  .pma-reveal { opacity: 0; transform: translateY(8px); animation: pma-rise var(--dur-slow) var(--ease) forwards; }
  .pma-reveal:nth-child(1) { animation-delay: 0ms; }
  .pma-reveal:nth-child(2) { animation-delay: 60ms; }
  .pma-reveal:nth-child(3) { animation-delay: 120ms; }
  .pma-reveal:nth-child(4) { animation-delay: 180ms; }
}
@keyframes pma-rise { to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Responsive — Enfold-aligned thresholds */
@media (max-width: 1199px) {
  .pma-split, .pma-split--8-4 { gap: var(--s-6); }
}
@media (max-width: 989px) {
  .pma-grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .pma-split, .pma-split--8-4 { grid-template-columns: 1fr; gap: var(--s-6); }
  .pma-grid--2, .pma-grid--3 { grid-template-columns: 1fr; }
}