diff --git a/components/LoginModal.tsx b/components/LoginModal.tsx
index c08def9..dc4c1b6 100644
--- a/components/LoginModal.tsx
+++ b/components/LoginModal.tsx
@@ -1,5 +1,5 @@
 import React, { useState } from 'react';
-import { X, Loader2, GraduationCap, School, ShieldCheck, UserPlus } from 'lucide-react';
+import { X, Loader2, GraduationCap, School, UserPlus } from 'lucide-react';
 import { useAuth } from '../context/AuthContext';
 import { useNavigate } from 'react-router-dom';
 import { UserRole } from '../types';
@@ -27,9 +27,9 @@ export const LoginModal: React.FC<LoginModalProps> = ({ isOpen, onClose }) => {
     setError('');
     setIsSubmitting(true);
 
-    if (isRegistering && role !== 'student') {
+    if (isRegistering && role === 'professor') {
       setIsSubmitting(false);
-      setError('Contas de instrutor e administrador são liberadas pelo superadmin da plataforma.');
+      setError('Contas de instrutor são liberadas pelo administrador da plataforma.');
       return;
     }
 
@@ -45,13 +45,11 @@ export const LoginModal: React.FC<LoginModalProps> = ({ isOpen, onClose }) => {
       return;
     }
 
-    if (signedInUser.role !== role) {
+    if (signedInUser.role !== 'superadmin' && signedInUser.role !== role) {
       logout();
-      setError(role === 'superadmin'
-        ? 'Esta conta não possui acesso de administrador.'
-        : role === 'professor'
-          ? 'Esta conta não possui acesso de instrutor.'
-          : 'Esta conta possui outro nível de acesso. Selecione a opção correspondente.');
+      setError(role === 'professor'
+        ? 'Esta conta não possui acesso de instrutor.'
+        : 'Esta conta possui acesso de instrutor. Selecione a opção Instrutor.');
       return;
     }
 
@@ -74,10 +72,7 @@ export const LoginModal: React.FC<LoginModalProps> = ({ isOpen, onClose }) => {
         </div>
 
         <div className="flex bg-black/40 p-1 rounded-[8px] mb-6 border border-white/5 relative">
-          <div
-            className="absolute top-1 bottom-1 w-[calc(33.333%-5px)] bg-orange-500/20 rounded-[8px] transition-all duration-300 ease-out border border-orange-500/30 shadow-md"
-            style={{ transform: `translateX(${role === 'student' ? 0 : role === 'professor' ? 100 : 200}%)` }}
-          />
+          <div className={`absolute top-1 bottom-1 w-[calc(50%-4px)] bg-orange-500/20 rounded-[8px] transition-all duration-300 ease-out border border-orange-500/30 shadow-md ${role === 'student' ? 'left-1' : 'left-[calc(50%+4px)]'}`} />
           <button type="button" onClick={() => setRole('student')} className={`flex-1 flex items-center justify-center gap-2 py-2.5 rounded-[8px] relative z-10 transition-colors duration-300 ${role === 'student' ? 'text-white font-semibold' : 'text-gray-400 hover:text-gray-300'}`}>
             <GraduationCap className="w-4 h-4" />
             <span className="text-body-sm font-semibold tracking-body-sm">Aluno</span>
@@ -86,10 +81,6 @@ export const LoginModal: React.FC<LoginModalProps> = ({ isOpen, onClose }) => {
             <School className="w-4 h-4" />
             <span className="text-body-sm font-semibold tracking-body-sm">Instrutor</span>
           </button>
-          <button type="button" onClick={() => setRole('superadmin')} className={`flex-1 flex items-center justify-center gap-2 py-2.5 rounded-[8px] relative z-10 transition-colors duration-300 ${role === 'superadmin' ? 'text-white font-semibold' : 'text-gray-400 hover:text-gray-300'}`}>
-            <ShieldCheck className="w-4 h-4" />
-            <span className="text-body-sm font-semibold tracking-body-sm">Admin</span>
-          </button>
         </div>
 
         <form onSubmit={handleSubmit} className="space-y-5">