/* =============================================================================
   Navarro Express — Base: reset, typography, layout primitives, utilities
   ============================================================================= */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 90px; /* offset for sticky header on anchor jumps */
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}
a:hover { color: var(--color-primary-hover); }

button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }

ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }

/* --- Headings --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--navy);
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }
p  { line-height: var(--lh-base); }

/* --- Focus visibility (accessibility) --- */
:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* --- Icons --- */
.icon { width: 24px; height: 24px; flex: none; }
.icon-sm { width: 18px; height: 18px; }
.icon-lg { width: 32px; height: 32px; }
.icon-xl { width: 40px; height: 40px; }

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

.section { padding-block: var(--sp-8); }
.section-sm { padding-block: var(--sp-7); }

@media (min-width: 1024px) {
  .section { padding-block: var(--sp-9); }
}

/* --- Section heading block --- */
.section-head { max-width: 680px; margin-bottom: var(--sp-6); }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-600);
  margin-bottom: var(--sp-3);
}
.section-head p {
  margin-top: var(--sp-3);
  font-size: var(--fs-md);
  color: var(--color-text-muted);
}

/* --- Generic grid helpers --- */
.grid { display: grid; gap: var(--sp-5); }
@media (min-width: 640px)  { .grid-2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 768px)  { .grid-3 { 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); }
}
@media (min-width: 640px) and (max-width: 1023px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* --- Utilities --- */
.text-center { text-align: center; }
.text-muted  { color: var(--color-text-muted); }
.bg-alt      { background: var(--color-surface-alt); }
.bg-navy     { background: var(--grad-navy); color: var(--color-text-invert); }
.bg-navy h2, .bg-navy h3 { color: var(--white); }

.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;
}

.skip-link {
  position: absolute; left: var(--sp-4); top: -100px;
  background: var(--navy); color: var(--white);
  padding: var(--sp-3) var(--sp-4); border-radius: var(--r-md);
  z-index: var(--z-modal); transition: top var(--dur-fast) var(--ease);
}
.skip-link:focus { top: var(--sp-4); color: var(--white); }

/* --- Reveal-on-scroll (progressive; no-JS = visible) --- */
.reveal { opacity: 0; transform: translateY(24px); }
.reveal.is-visible {
  opacity: 1; transform: none;
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}