.header{
  position:sticky;
  top:0;
  z-index:50;
  backdrop-filter:blur(12px);
  background:rgba(8,16,24,.72);
  border-bottom:1px solid var(--line);
}
.nav{min-height:var(--header-height);display:flex;align-items:center;justify-content:space-between;gap:16px;}
.brand{display:flex;align-items:center;}
.brand img{height:54px;width:auto;border-radius:10px;box-shadow:var(--shadow);background:#fff;}
.menu-wrap{position:relative;}
.menu-actions{display:flex;gap:8px;align-items:center;}
.menu-button{border:1px solid var(--line);background:var(--card);color:var(--fg);border-radius:12px;padding:10px 14px;cursor:pointer;font-weight:600;min-width:110px;}
.dropdown{position:absolute;right:0;top:calc(100% + 10px);min-width:190px;background:#0f1923;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:8px;display:none;}
.dropdown a{display:block;padding:11px 12px;border-radius:10px;color:var(--fg);}
.dropdown a:hover{background:rgba(255,255,255,.06);}
.menu-wrap.open .dropdown{display:block;}
@media (max-width:900px){.brand img{height:46px;}.menu-button{min-width:auto;}}