diff --git a/app/templates/base.html b/app/templates/base.html
index 00e3d53..9f4b922 100644
--- a/app/templates/base.html
+++ b/app/templates/base.html
@@ -24,26 +24,26 @@
         <span class="sidebar-titulo">Painel de Clientes</span>
       </div>
       <nav class="sidebar-nav">
-        <a href="/clientes">
+        <a href="/clientes" class="{{ 'ativo' if request.url.path.startswith('/clientes') else '' }}">
           <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="3" y="4" width="18" height="16" rx="2"/><path d="M3 9h18M9 21V9"/></svg>
           <span>Clientes</span>
         </a>
-        <a href="/gerador-chave">
+        <a href="/gerador-chave" class="{{ 'ativo' if request.url.path.startswith('/gerador-chave') else '' }}">
           <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="8" cy="15" r="4"/><path d="M11 12l9-9M17 6l3 3M14 9l2 2"/></svg>
           <span>Gerador de chave</span>
         </a>
         {% if request.state.usuario and request.state.usuario.eh_admin %}
-        <a href="/funcionarios">
+        <a href="/funcionarios" class="{{ 'ativo' if request.url.path.startswith('/funcionarios') else '' }}">
           <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="9" cy="7" r="4"/><path d="M2 21v-2a5 5 0 0 1 5-5h4a5 5 0 0 1 5 5v2M17 11l2 2 4-4"/></svg>
           <span>Funcionários</span>
         </a>
         {% endif %}
-        <a href="/log">
+        <a href="/log" class="{{ 'ativo' if request.url.path.startswith('/log') else '' }}">
           <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M9 3H5a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-4"/><path d="M9 15h6M9 11h10M9 7h4"/></svg>
           <span>Log</span>
         </a>
         {% if request.state.usuario %}
-        <a href="/minha-conta">
+        <a href="/minha-conta" class="{{ 'ativo' if request.url.path.startswith('/minha-conta') else '' }}">
           <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="8" r="4"/><path d="M4 21a8 8 0 0 1 16 0"/></svg>
           <span>Minha conta</span>
         </a>