.app-shell { min-height: 100vh; display: flex; }

.sidebar { width: 200px; flex-shrink: 0; background: var(--bg-elev); border-right: 1px solid var(--border);
  padding: var(--sp-5) var(--sp-3); display: flex; flex-direction: column; gap: var(--sp-2); }
.sidebar-titulo { font-weight: 700; font-size: var(--fs-sm); color: var(--text-dim); text-transform: uppercase;
  letter-spacing: .5px; padding: 0 var(--sp-3); margin-bottom: var(--sp-3); }
.sidebar-link { display: block; padding: var(--sp-3); border-radius: var(--radius-sm); color: var(--text-dim);
  text-decoration: none; font-size: var(--fs-base); }
.sidebar-link:hover { background: var(--surface); color: var(--text); }
.sidebar-link.ativo { background: var(--accent); color: #fff; font-weight: 600; }

.conteudo { flex: 1; display: flex; flex-direction: column; align-items: center; padding: var(--sp-5); }
.calc { width: 100%; max-width: 420px; }
.calc > h1 { margin-bottom: var(--sp-2); }
.calc > p.dim { margin-bottom: var(--sp-5); }

.sidebar-rodape { margin-top: auto; padding-top: var(--sp-4); border-top: 1px solid var(--border);
  display: flex; flex-direction: column; gap: var(--sp-2); }
.sidebar-usuario { display: flex; flex-direction: column; padding: 0 var(--sp-3); font-size: var(--fs-sm); gap: 2px; }
.sidebar-usuario span { font-size: var(--fs-xs); }
.sidebar-sair { color: var(--danger); }

.pagina-login { min-height: 100vh; width: 100%; display: flex; align-items: center; justify-content: center; padding: var(--sp-5); }

@media (max-width: 640px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--border); }
  .sidebar-titulo { display: none; }
  .sidebar-rodape { margin-top: 0; padding-top: 0; border-top: none; flex-direction: row; align-items: center; }
}