*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:#F9FAFB;}
::-webkit-scrollbar{width:6px;}::-webkit-scrollbar-track{background:#f1f1f1;}::-webkit-scrollbar-thumb{background:#ccc;border-radius:3px;}

@media(max-width:640px){
  .app-layout{flex-direction:column!important;}
  .sidebar-desktop{display:none!important;}
  .main-content{padding:16px 14px 80px!important;}
  .bottom-nav{display:flex!important;}
  .grid-2col{grid-template-columns:1fr!important;}
  .grid-3col{grid-template-columns:1fr!important;}
  .kpi-grid-mobile{grid-template-columns:repeat(2,1fr)!important;}
  .usuarios-table-desktop{display:none!important;}
  .usuarios-cards-mobile{display:flex!important;}
}
@media(min-width:641px){
  .bottom-nav{display:none!important;}
  .usuarios-cards-mobile{display:none!important;}
}

.bottom-nav{
  position:fixed;bottom:0;left:0;right:0;z-index:100;
  background:#1E3A5F;border-top:1px solid #ffffff20;
  justify-content:space-around;align-items:center;
  padding:8px 4px calc(8px + env(safe-area-inset-bottom));
}
.bottom-nav button{
  display:flex;flex-direction:column;align-items:center;gap:3px;
  background:none;border:none;cursor:pointer;padding:4px 8px;
  color:#ffffff80;font-size:10px;font-weight:500;min-width:44px;
}
.bottom-nav button.active{color:#fff;}
.bottom-nav button span.icon{font-size:20px;}