/* ══════════════════════════════════════════
   QURTÈN — Header & Mobile Navigation
   ══════════════════════════════════════════ */

/* ── Sticky Header ─────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 210;
  height: var(--header-h);
  background: transparent;
  transition: background var(--dur-slow) var(--ease-smooth),
              box-shadow var(--dur-slow) var(--ease-smooth),
              backdrop-filter var(--dur-slow) var(--ease-smooth);
}

.site-header.is-scrolled {
  background: rgba(250, 248, 245, 0.96);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 rgba(70, 86, 65, 0.1);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: 1.375rem;
  max-width: var(--container);
  margin-inline: auto;
}

@media (min-width: 640px)  { .header__inner { padding-inline: 2rem; } }
@media (min-width: 768px)  { .header__inner { padding-inline: 2.75rem; } }
@media (min-width: 1280px) { .header__inner { padding-inline: 4.5rem; } }

/* Header logo adapts to background */
.site-header:not(.is-scrolled) .logo {
  color: rgba(255, 255, 255, 0.92);
  border-bottom-color: rgba(255, 255, 255, 0.38);
}

/* Logo goes dark when mobile nav is open (light overlay behind it) */
.nav-open .site-header .logo {
  color: var(--clr-logo) !important;
  border-bottom-color: var(--clr-logo-border) !important;
}

/* ── Desktop Navigation ────────────────── */
.nav--desktop {
  display: none;
  align-items: center;
  gap: 2.5rem;
}

@media (min-width: 1024px) {
  .nav--desktop { display: flex; }
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__list a {
  font-family: var(--ff-body);
  font-size: 0.75rem;
  font-weight: var(--fw-500);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-muted);
  position: relative;
  transition: color var(--dur-base) var(--ease-smooth);
}

.nav__list a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--clr-accent);
  transition: width var(--dur-base) var(--ease-smooth);
}

.nav__list a:hover { color: var(--clr-text); }
.nav__list a:hover::after { width: 100%; }

/* White links over hero */
.site-header:not(.is-scrolled) .nav__list a {
  color: rgba(255, 255, 255, 0.68);
}
.site-header:not(.is-scrolled) .nav__list a:hover {
  color: rgba(255, 255, 255, 1);
}
.site-header:not(.is-scrolled) .nav__list a::after {
  background: rgba(255, 255, 255, 0.6);
}

/* Ghost CTA button adapts to hero */
.site-header:not(.is-scrolled) .nav__cta {
  border-color: rgba(255, 255, 255, 0.55);
  color: rgba(255, 255, 255, 0.9);
}
.site-header:not(.is-scrolled) .nav__cta:hover {
  background: rgba(255, 255, 255, 0.13);
  border-color: rgba(255, 255, 255, 0.9);
  color: #fff;
}

/* ── Hamburger ─────────────────────────── */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 18px;
  padding: 0;
  position: relative;
  flex-shrink: 0;
}

@media (min-width: 1024px) { .hamburger { display: none; } }

.hamburger__bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background: #fff;
  transition: transform var(--dur-base) var(--ease-smooth),
              opacity var(--dur-base) var(--ease-smooth),
              width var(--dur-base) var(--ease-smooth),
              background var(--dur-base);
  transform-origin: center;
}

.site-header.is-scrolled .hamburger__bar { background: var(--clr-text); }

/* X state */
.nav-open .hamburger__bar:nth-child(1) {
  transform: translateY(8.25px) rotate(45deg);
  background: var(--clr-text) !important;
}
.nav-open .hamburger__bar:nth-child(2) {
  opacity: 0;
  width: 0;
  background: var(--clr-text) !important;
}
.nav-open .hamburger__bar:nth-child(3) {
  transform: translateY(-8.25px) rotate(-45deg);
  background: var(--clr-text) !important;
}

/* ── Mobile Nav Overlay ────────────────── */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--clr-bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--header-h) + 2.5rem) 1.375rem 3rem;

  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 0.28s var(--ease-smooth),
              transform 0.28s var(--ease-smooth);
}

@media (min-width: 640px) { .nav-overlay { padding-inline: 2rem; } }

.nav-open .nav-overlay {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

/* Nav links */
.nav-overlay__list {
  margin-bottom: 2.5rem;
}

.nav-overlay__link {
  display: block;
  font-family: var(--ff-display);
  font-size: clamp(2.5rem, 11vw, 4.5rem);
  font-weight: var(--fw-400);
  line-height: 1.35;
  color: var(--clr-text);
  padding-block: 0.1em;
  border-bottom: 1px solid var(--clr-bg-3);
  transition: color var(--dur-base) var(--ease-smooth),
              letter-spacing var(--dur-base) var(--ease-smooth);
}

.nav-overlay__link:hover {
  color: var(--clr-accent);
  letter-spacing: 0.02em;
}

/* Contact card buttons */
.nav-overlay__contact {
  border-top: 1px solid rgba(70, 86, 65, 0.12);
  padding-top: 2rem;
}

.nav-overlay__contact-btn--call {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 0.5rem;
  padding: 1.25rem;
  background: var(--clr-logo);
  border: 1px solid var(--clr-logo);
  color: var(--clr-white) !important;
  text-decoration: none;
  transition: transform var(--dur-base) var(--ease-smooth),
              background var(--dur-base),
              box-shadow var(--dur-base);
}

.nav-overlay__contact-btn--call:hover,
.nav-overlay__contact-btn--call:active {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(184, 154, 114, 0.25);
}

.nav-overlay__contact-btn--call .nav-overlay__contact-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--ff-body);
  font-size: 0.6875rem;
  font-weight: var(--fw-700);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

.nav-overlay__contact-btn--call .nav-overlay__contact-value {
  font-family: var(--ff-body);
  font-size: 1.125rem;
  font-weight: var(--fw-600);
  color: #fff;
  line-height: 1.2;
}