.mobile-header,.mobile-menu-close,.mobile-menu-backdrop{display:none}
@media(max-width:900px){
  .mobile-header{display:flex;align-items:center;justify-content:space-between;gap:16px;position:sticky;top:0;z-index:100;background:var(--card);border-bottom:1px solid var(--line);padding:10px 18px;padding-top:max(10px,env(safe-area-inset-top))}
  .mobile-header img{display:block;width:170px;max-width:calc(100vw - 140px);height:auto}
  .mobile-menu-toggle,.mobile-menu-close{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;min-width:44px;cursor:pointer}
  .mobile-menu-toggle svg,.mobile-menu-close svg{width:22px;height:22px;flex-shrink:0}
  .mobile-menu-toggle:focus-visible,.mobile-menu-close:focus-visible,.side button:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
  .side.mobile-menu-open{display:flex;position:fixed;inset:0 auto 0 0;width:min(320px,calc(100vw - 48px));height:100vh;height:100dvh;z-index:302;overflow-y:auto;overscroll-behavior:contain;padding-top:max(16px,env(safe-area-inset-top));padding-bottom:max(22px,env(safe-area-inset-bottom));box-shadow:12px 0 40px rgba(15,23,42,.18)}
  .mobile-menu-close{align-self:flex-end;margin-bottom:12px;flex-shrink:0}
  .side.mobile-menu-open .brand{margin-bottom:16px;flex-shrink:0}
  .side.mobile-menu-open .nav button{min-height:44px;cursor:pointer}
  .mobile-menu-backdrop:not([hidden]){display:block;position:fixed;inset:0;z-index:301;background:rgba(15,23,42,.45)}
  body.mobile-menu-open{overflow:hidden}
}