fix: restaurar estilos do sidebar e remover botao fechar

src/app/globals.css

@@ -126,6 +126,79 @@ body {
   text-decoration: none;
 }
 
+.logo-icon {
+  width: 40px;
+  height: 40px;
+  background: var(--gradient-primary);
+  border-radius: var(--radius-md);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 20px;
+  color: white;
+  box-shadow: var(--shadow-glow);
+}
+
+.logo-text {
+  font-size: 20px;
+  font-weight: 800;
+  background: var(--gradient-primary);
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  letter-spacing: -0.5px;
+}
+
+.sidebar-nav {
+  flex: 1;
+  padding: 16px 12px;
+  overflow-y: auto;
+}
+
+.nav-section-title {
+  font-size: 11px;
+  font-weight: 700;
+  color: var(--text-muted);
+  text-transform: uppercase;
+  letter-spacing: 1.2px;
+  padding: 16px 12px 8px;
+}
+
+.nav-item {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 12px;
+  border-radius: var(--radius-sm);
+  color: var(--text-secondary);
+  text-decoration: none;
+  font-size: 14px;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  border: none;
+  background: none;
+  width: 100%;
+  text-align: left;
+}
+
+.nav-item:hover {
+  background: rgba(255, 255, 255, 0.08);
+  color: var(--text-primary);
+}
+
+.nav-item.active {
+  background: var(--accent-glow);
+  color: var(--accent);
+  font-weight: 600;
+}
+
+.nav-item svg { width: 20px; height: 20px; flex-shrink: 0; }
+
+.sidebar-footer {
+  padding: 16px;
+  border-top: 1px solid var(--border-color);
+}
+
 .desktop-collapse-btn {
   color: var(--text-secondary);
 }

src/components/Sidebar.tsx

@@ -65,9 +65,6 @@ export default function Sidebar({ currentPage, onNavigate, isOpen, onClose, curr
               {isCollapsed ? <PanelLeftOpen size={18} /> : <PanelLeftClose size={18} />}
             </button>
           )}
-          <button type="button" className="btn-ghost btn-icon mobile-close-btn" onClick={onClose}>
-            <X size={20} />
-          </button>
         </div>
 
         <nav className="sidebar-nav">