/* ════════════════════════════════════════════════════════════════
   KALYSTEON — Mobile Navigation (hamburger + fullscreen overlay)
   Shared across all pages. Desktop (>768px) is never affected:
   everything here lives inside @media (max-width:768px).
   ════════════════════════════════════════════════════════════════ */

/* Hamburger button — hidden on desktop, injected into <header> */
.mnav-toggle {
  display: none;
  position: relative;
  z-index: 2002;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0.5px solid rgba(201,168,76,0.30);
  border-radius: 10px;
  background: rgba(255,255,255,0.04);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  -webkit-tap-highlight-color: transparent;
}
.mnav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--gold-bright, #e7c96b);
  transition: transform 0.3s ease, opacity 0.2s ease;
}
.mnav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mnav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mnav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Fullscreen overlay */
.mnav-overlay {
  position: fixed;
  inset: 0;
  z-index: 2001;
  background: rgba(8,10,14,0.97);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.28s ease, transform 0.28s ease, visibility 0s linear 0.28s;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 90px 22px 48px;
}
.mnav-overlay.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.28s ease, transform 0.28s ease, visibility 0s;
}

.mnav-close {
  position: absolute;
  top: 20px;
  right: 22px;
  width: 42px;
  height: 42px;
  font-size: 30px;
  line-height: 1;
  color: var(--text-muted, #9aa0aa);
  background: rgba(255,255,255,0.04);
  border: 0.5px solid rgba(255,255,255,0.10);
  border-radius: 10px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.mnav-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 480px;
  margin: 0 auto;
}

.mnav-group {
  border-bottom: 0.5px solid rgba(255,255,255,0.08);
}
.mnav-row {
  display: flex;
  align-items: stretch;
}
.mnav-link {
  flex: 1;
  display: flex;
  align-items: center;
  min-height: 54px;
  padding: 0 4px;
  font-family: 'Inter', sans-serif;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #f3f0e8;
  text-decoration: none;
}
.mnav-link:active { color: var(--gold-bright, #e7c96b); }

.mnav-exp {
  width: 54px;
  min-height: 54px;
  flex: 0 0 auto;
  background: none;
  border: none;
  color: var(--gold-bright, #e7c96b);
  font-size: 22px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mnav-exp span { transition: transform 0.3s ease; display: inline-block; }
.mnav-group.open .mnav-exp span { transform: rotate(45deg); }

.mnav-sub {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}
.mnav-group.open .mnav-sub { grid-template-rows: 1fr; }
.mnav-sub > div { overflow: hidden; }
.mnav-sub-inner {
  display: flex;
  flex-direction: column;
  padding: 2px 0 12px 6px;
}
.mnav-subitem {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 0 8px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: var(--text-muted, #aeb3bd);
  text-decoration: none;
}
.mnav-subitem:active { color: var(--gold-bright, #e7c96b); }
.mnav-subitem .nav-dd-icon {
  width: 20px;
  text-align: center;
  opacity: 0.85;
  flex: 0 0 auto;
}
.mnav-subitem .nav-dd-divider { display: none; }

/* Currency + language toggles relocated into the overlay (mobile only) */
.mnav-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
  max-width: 480px;
  margin: 0 auto 26px;
}

/* Activate only at mobile breakpoint */
@media (max-width: 768px) {
  .mnav-toggle { display: flex; }
  /* Unify: hide the desktop inline nav across every page at this width */
  header .header-nav { display: none !important; }
  /* Tighten header padding so logo + cart + hamburger fit comfortably */
  header { padding-left: 16px !important; padding-right: 16px !important; }
  /* Safety net: currency + language live in the overlay on mobile. The JS
     relocates them there; this guarantees they never overflow the header
     even if relocation didn't run (e.g. desktop loaded then resized). */
  header .curr-toggle, header .lang-toggle { display: none !important; }
}
@media (min-width: 769px) {
  .mnav-overlay { display: none; }
}