diff --git a/src/components/LoginDialog.vue b/src/components/LoginDialog.vue
new file mode 100644
index 0000000..24bedb4
--- /dev/null
+++ b/src/components/LoginDialog.vue
@@ -0,0 +1,69 @@
+<template>
+  <v-dialog v-model="show" max-width="400">
+    <v-card>
+      <v-card-title class="headline">Iniciar sesión</v-card-title>
+      <v-card-text>
+        <v-form ref="form" @submit.prevent="onSubmit">
+          <v-text-field
+            v-model="username"
+            label="Usuario"
+            :rules="[required]"
+            required
+          />
+          <v-text-field
+            v-model="password"
+            label="Contraseña"
+            type="password"
+            :rules="[required]"
+            required
+          />
+          <v-alert v-if="error" type="error" class="mt-2">{{ error }}</v-alert>
+        </v-form>
+      </v-card-text>
+
+      <v-card-actions>
+        <v-spacer />
+        <v-btn text @click="show = false">Cancelar</v-btn>
+        <v-btn color="primary" @click="onSubmit">Entrar</v-btn>
+      </v-card-actions>
+    </v-card>
+  </v-dialog>
+</template>
+
+<script>
+import AuthService from '@/services/auth';
+
+export default {
+  name: 'LoginDialog',
+  data: () => ({
+    show: false,
+    username: '',
+    password: '',
+    error: '',
+  }),
+  methods: {
+    required(v) {
+      return !!v || 'Campo obligatorio';
+    },
+    async onSubmit() {
+      this.error = '';
+      const form = this.$refs.form;
+      if (!(await form.validate())) return;
+
+      try {
+        await AuthService.login({
+          username: this.username,
+          password: this.password,
+        });
+        this.show = false;
+        this.$emit('login-success');   // notifica al NavBar
+      } catch (e) {
+        this.error = e.message ?? 'Error al iniciar sesión';
+      }
+    },
+    open() {
+      this.show = true;
+    },
+  },
+};
+</script>
diff --git a/src/services/auth.js b/src/services/auth.js
index 600e643..3766e8e 100644
--- a/src/services/auth.js
+++ b/src/services/auth.js
@@ -61,6 +61,10 @@ class AuthService {
     return data.access;
   }
 
+  static isAuthenticated() {
+    return !!this.getAccessToken();
+  }
+
   static logout() {
     localStorage.removeItem(this.TOKEN_KEY);
     localStorage.removeItem(this.REFRESH_KEY);