/* ==========================================================================
   iWEX Website — header / footer chrome (reused on every page)
   ========================================================================== */
:root { --hdr-h: 4.25rem; }

/* ----- Header ----------------------------------------------------------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  --hdr-fg: var(--ink);
  background: color-mix(in oklch, var(--surface) 82%, transparent);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header__inner {
  height: var(--hdr-h);
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-6);
}
/* Overlay (over dark hero) until scrolled */
.site-header--overlay { background: transparent; border-bottom-color: transparent; -webkit-backdrop-filter: none; backdrop-filter: none; }
.site-header--overlay:not(.is-scrolled) { --hdr-fg: var(--n-50); }
.site-header--overlay.is-scrolled {
  background: color-mix(in oklch, var(--surface) 82%, transparent);
  border-bottom-color: var(--border);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
}
/* Push non-overlay pages below the fixed header */
.site-header:not(.site-header--overlay) ~ main { padding-top: var(--hdr-h); }

/* ----- Brand ------------------------------------------------------------ */
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--hdr-fg); }
.brand__mark { display: inline-flex; color: var(--hdr-fg); }
.brand__word { font-family: var(--font-display); font-weight: 700; font-size: 1.35rem; letter-spacing: -0.03em; }

/* Brand logo image (the blue "iwex INFOMATICS" lockup). It's fixed blue/grey,
   so knock it to white on dark chrome (overlay hero header + footer); show its
   native colour on the solid light header. Selectors are scoped under the
   header/footer so they outrank the generic `.iwex img { height:auto }` reset
   in tokens.css. */
.site-header .brand__logo { height: 2.2rem; width: auto; max-width: none; display: block; }
.site-footer .brand__logo--footer { height: 2.5rem; width: auto; max-width: none; display: block; }
.site-header--overlay:not(.is-scrolled) .brand__logo,
.site-footer .brand__logo { filter: brightness(0) invert(1); }

/* ----- Nav -------------------------------------------------------------- */
.nav { display: flex; align-items: center; }
.nav__panel { display: flex; align-items: center; gap: var(--sp-1); }
/* `.site-header` prefix so the header foreground colour outranks `.iwex a`
   (both would otherwise be 0,1,1 / 0,1,0 and the prose-link rule would win,
   turning nav links brand-blue over the dark hero). */
.site-header .nav__link {
  font-size: var(--step-0); font-weight: 500; color: var(--hdr-fg);
  text-decoration: none; padding: 0.5rem 0.75rem; border-radius: var(--r-sm);
  opacity: 0.85; transition: opacity var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav__link:hover { opacity: 1; background: color-mix(in oklch, var(--hdr-fg) 8%, transparent); }
.nav__link.is-active { opacity: 1; font-weight: 600; }
.nav__link.is-active::after { content: ""; display: block; height: 2px; margin-top: 2px;
  background: var(--accent); border-radius: 2px; }
.nav__cta { margin-left: var(--sp-3); }
.nav__toggle { display: none; }

/* ----- Mobile nav ------------------------------------------------------- */
@media (max-width: 860px) {
  .nav__toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 2.75rem; height: 2.75rem; border: 1px solid color-mix(in oklch, var(--hdr-fg) 25%, transparent);
    border-radius: var(--r-md); background: transparent; color: var(--hdr-fg); cursor: pointer;
  }
  .nav__bars, .nav__bars::before, .nav__bars::after {
    content: ""; display: block; width: 18px; height: 2px; background: currentColor; border-radius: 2px;
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  }
  .nav__bars { position: relative; }
  .nav__bars::before { position: absolute; top: -6px; }
  .nav__bars::after { position: absolute; top: 6px; }
  .nav__toggle[aria-expanded="true"] .nav__bars { background: transparent; }
  .nav__toggle[aria-expanded="true"] .nav__bars::before { transform: translateY(6px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] .nav__bars::after { transform: translateY(-6px) rotate(-45deg); }

  .nav__panel {
    position: fixed; inset: var(--hdr-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: var(--sp-1);
    padding: var(--sp-4) var(--gutter) var(--sp-6);
    background: var(--surface); border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  }
  .nav__panel.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .site-header .nav__link { color: var(--ink); opacity: 1; padding: 0.85rem 0.75rem; font-size: var(--step-1); }
  .nav__link.is-active::after { display: none; }
  .nav__cta { margin-left: 0; margin-top: var(--sp-2); }
  body.nav-open { overflow: hidden; }
}

/* ----- Footer (blue-drenched, dark in both themes) ---------------------- */
.site-footer { background: var(--blue-950); color: oklch(0.84 0.02 258); margin-top: 0; }
.site-footer__inner {
  display: grid; gap: var(--sp-10) var(--sp-8);
  grid-template-columns: 1.4fr 2fr;
  padding-block: clamp(3rem, 2rem + 3vw, 5rem);
}
@media (max-width: 860px) { .site-footer__inner { grid-template-columns: 1fr; } }
.site-footer .brand--footer { color: oklch(0.97 0.01 255); }
.site-footer__blurb { color: oklch(0.80 0.02 258); max-width: 34ch; margin: var(--sp-4) 0 var(--sp-4); }
.site-footer__cert { display: flex; align-items: center; gap: 0.5rem; font-size: var(--step--1); color: oklch(0.86 0.02 258); margin: 0; }
.site-footer__cert .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--orange-400); box-shadow: 0 0 0 3px oklch(0.705 0.191 41.5 / 0.2); }
.site-footer__nav { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-6); }
@media (max-width: 620px) { .site-footer__nav { grid-template-columns: repeat(2, 1fr); } }
.foot-col { display: flex; flex-direction: column; gap: 0.6rem; }
/* Scoped under .site-footer so the font-size beats the generic `.iwex h2`
   element rule in tokens.css (these titles are <h2> for document outline). */
.site-footer .foot-col__title { font-family: var(--font-body); font-size: var(--step--1); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em; color: oklch(0.74 0.03 258); margin: 0 0 0.3rem; line-height: 1.3; }
.site-footer a { color: oklch(0.90 0.015 255); text-decoration: none; font-size: var(--step-0); width: fit-content; }
.site-footer a:hover { color: var(--orange-400); }
.foot-whatsapp { display: inline-flex; align-items: center; gap: 0.45rem; }
.site-footer__base {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--sp-3);
  padding-block: var(--sp-6); border-top: 1px solid oklch(1 0 0 / 0.08);
  font-size: var(--step--1); color: oklch(0.68 0.02 258);
}
.site-footer__base p { margin: 0; max-width: none; }