/* ==========================================================
   Porter Group — Layout: header, brand, nav, footer
   ========================================================== */

/* ─── Header ─────────────────────────────────────────── */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header__inner {
  height: var(--header-h);
  padding-inline: var(--gutter);
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-6);
}

/* Transparent state (over dark hero) uses cream logo + cream nav */
.site-header .brand__logo--ink { display: none; }
.site-header .brand__logo--cream { display: block; }
.site-header .nav-primary a,
.site-header .nav-primary button { color: hsl(44 28% 92% / 0.85); }

/* Solid state — appears on scroll OR when body[data-header="solid"] */
.site-header.is-scrolled,
.site-header.is-solid {
  background: hsl(48 30% 97% / 0.92);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom-color: var(--border);
  box-shadow: 0 1px 0 rgba(13,13,13,.02);
}

.site-header.is-scrolled .brand__logo--cream,
.site-header.is-solid    .brand__logo--cream { display: none; }
.site-header.is-scrolled .brand__logo--ink,
.site-header.is-solid    .brand__logo--ink { display: block; }

.site-header.is-scrolled .nav-primary a,
.site-header.is-scrolled .nav-primary button,
.site-header.is-solid    .nav-primary a,
.site-header.is-solid    .nav-primary button { color: var(--ink); }

/* Focused/hover on nav items always goes to gold */
.site-header .nav-primary a:hover,
.site-header .nav-primary a[aria-current="page"],
.site-header .nav-primary button:hover { color: var(--gold); }

/* When the CTA button is on a transparent header over a dark hero,
   swap to inverse outline styling; on scrolled/solid, use default */
.site-header .btn.nav-cta {
  background: transparent;
  color: var(--cream);
  border-color: hsl(44 28% 92% / 0.55);
}
.site-header .btn.nav-cta:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--cream);
}
.site-header.is-scrolled .btn.nav-cta,
.site-header.is-solid    .btn.nav-cta {
  background: var(--ink);
  color: var(--cream);
  border-color: var(--ink);
}
.site-header.is-scrolled .btn.nav-cta:hover,
.site-header.is-solid    .btn.nav-cta:hover {
  background: var(--gold);
  border-color: var(--gold);
}

/* ─── Brand (logo lockup) ─────────────────────────────── */

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0;
  line-height: 1;
  color: inherit;
}

.brand__logo {
  height: 60px;
  width: auto;
  transition: opacity var(--dur-fast) var(--ease);
}

.brand:hover .brand__logo { opacity: 0.85; }

@media (max-width: 720px) {
  .brand__logo { height: 44px; }
}

/* Tiny inline mark used in body copy — the gold asterisk */
.brand-mark {
  color: var(--gold);
  font-family: var(--font-serif);
  font-style: normal;
  display: inline-block;
  transform: translateY(-0.1em);
}

/* ─── Primary Nav ─────────────────────────────────────── */

.nav-primary {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.25rem);
}

.nav-primary ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.25rem);
}

.nav-primary a,
.nav-primary button {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  padding: 0.25rem 0;
  position: relative;
  transition: color var(--dur-fast) var(--ease);
}

/* Active nav gets a small gold underline */
.nav-primary a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -6px;
  height: 1px;
  background: var(--gold);
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  color: currentColor;
}
.nav-toggle svg { width: 22px; height: 22px; stroke: currentColor; }

.site-header .nav-toggle { color: var(--cream); }
.site-header.is-scrolled .nav-toggle,
.site-header.is-solid    .nav-toggle { color: var(--ink); }

@media (max-width: 960px) {
  .nav-primary { display: none; }
  .nav-toggle { display: inline-flex; }

  .nav-primary.is-open {
    display: flex;
    position: fixed;
    inset: 0;
    background: var(--ink);
    padding-top: calc(var(--header-h-mobile) + var(--s-6));
    padding-inline: var(--gutter);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: var(--s-4);
    z-index: 40;
  }
  .nav-primary.is-open ul {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--s-4);
    width: 100%;
  }
  .nav-primary.is-open a,
  .nav-primary.is-open button {
    color: var(--cream) !important;
    font-family: var(--font-serif);
    font-size: var(--text-4xl);
    letter-spacing: -0.01em;
    text-transform: none;
    font-weight: 400;
  }
  .nav-primary.is-open .btn.nav-cta {
    margin-top: var(--s-6);
    background: var(--gold);
    border-color: var(--gold);
    color: var(--cream);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    text-transform: uppercase;
  }
}

/* ─── Footer ─────────────────────────────────────────── */

.site-footer {
  background: var(--ink);
  color: var(--cream);
  padding-top: var(--s-10);
  padding-bottom: var(--s-6);
  margin-top: 0;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: var(--s-8);
  padding-bottom: var(--s-9);
  border-bottom: 1px solid hsl(44 28% 92% / 0.14);
  margin-bottom: var(--s-5);
}

@media (max-width: 900px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .site-footer__grid { grid-template-columns: 1fr; gap: var(--s-6); }
}

.site-footer .brand__logo--ink { display: none; }
.site-footer .brand__logo--cream { display: block; }
.site-footer .brand__logo { height: 88px; }

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: hsl(44 28% 92% / 0.6);
  font-weight: 500;
  margin: 0 0 var(--s-4);
}

.footer-col ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.footer-col a {
  color: hsl(44 28% 92% / 0.9);
  font-size: var(--text-md);
  font-family: var(--font-sans);
  transition: color var(--dur-fast) var(--ease);
}

.footer-col a:hover { color: var(--gold); }

.footer-col a.sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-md);
}

.footer-col.newsletter p {
  font-family: var(--font-serif);
  font-style: italic;
  color: hsl(44 28% 92% / 0.75);
  font-size: var(--text-md);
  margin-bottom: var(--s-4);
  max-width: 32ch;
}

.footer-col.newsletter form {
  display: flex;
  gap: 0;
  border-bottom: 1px solid hsl(44 28% 92% / 0.24);
  padding-bottom: var(--s-2);
}

.footer-col.newsletter input {
  flex: 1;
  background: transparent;
  border: 0;
  color: var(--cream);
  padding: 0.75rem 0;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
}

.footer-col.newsletter input::placeholder {
  color: hsl(44 28% 92% / 0.4);
}

.footer-col.newsletter input:focus { outline: none; }

.footer-col.newsletter button {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--cream);
  padding: 0 var(--s-3);
  transition: color var(--dur-fast) var(--ease);
}

.footer-col.newsletter button:hover { color: var(--gold); }

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-3);
  font-size: var(--text-xs);
  color: hsl(44 28% 92% / 0.55);
  letter-spacing: 0.02em;
}