/* =========================
   Site Header (light + dark aware)
   ========================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(120%) blur(8px);
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--glass-ring);
  box-shadow: 0 8px 20px rgba(0,0,0,.12);
  transition: background .3s ease, box-shadow .3s ease;
}
[data-theme="dark"] .site-header{
  background: linear-gradient(180deg, rgba(30,32,38,.85), rgba(30,32,38,.65));
  box-shadow: 0 8px 20px rgba(0,0,0,.45);
}

.header-content{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px var(--sp-4);
  gap: 16px;
}

/* =========================
   Site Title
   ========================= */
.site-title{
  margin: 0;
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 800;
  background: linear-gradient(90deg, #c7b2bb 0%, var(--rose-500) 55%, #c7b2bb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: .3px;
  position: relative;
}
.site-title::after{
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  height: 3px;
  width: 56%;
  background: var(--grad);
  border-radius: 999px;
  filter: saturate(120%);
}

/* =========================
   Header Nav Links
   ========================= */
.site-nav .nav-link{
  padding: 6px 10px;
  border: 1px solid var(--glass-ring);
  border-radius: 999px;
  background: var(--panel);
  color: var(--ink);
  transition: transform .15s ease, background .2s ease, box-shadow .2s ease;
}
.site-nav .nav-link:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* Language flags layout */
.lang-flags{
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.lang-flags img{
  width: 22px; height: 16px;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,.15);
  cursor: pointer;
}

/* =========================
   Desktop/Mobile visibility helpers
   ========================= */
.desktop-only{ display: none; }
.mobile-only{ display: block; }

@media (min-width: 900px){
  .desktop-only{ display: block; }
  .mobile-only{ display: none; }
}

/* =========================
   Mobile Header/Nav
   ========================= */
@media (max-width: 900px){
  .header-content{ flex-wrap: wrap; gap: 12px; }
  .site-nav{ width: 100%; display: none; } /* revealed inside .mnav */
}