/* ---- navbar ---- */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,241,231,.82);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--hairline);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center}
.brand img{height:42px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:2rem;font-size:.83rem;letter-spacing:.06em}
.nav-links a{color:var(--muted);transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.lang{display:flex;gap:.15rem;font-size:.78rem;letter-spacing:.08em;border:1px solid var(--hairline);border-radius:999px;overflow:hidden}
.lang button{
  background:none;border:none;cursor:pointer;padding:.35rem .7rem;color:var(--muted);
  font-family:inherit;font-size:inherit;letter-spacing:inherit;transition:.2s;
}
.lang button.active{background:var(--ink);color:var(--sand)}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;font-size:1.4rem;color:var(--ink)}

@media(max-width:820px){
  .nav-links{position:fixed;inset:68px 0 auto 0;flex-direction:column;background:var(--sand);
    border-bottom:1px solid var(--hairline);padding:1.5rem;gap:1.3rem;display:none}
  .nav-links.open{display:flex}
  .menu-toggle{display:block}
}