diff --git a/package-lock.json b/package-lock.json
index 0489063..83685e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,6 @@
         "@testing-library/user-event": "^13.5.0",
         "eslint-config-airbnb": "^18.0.1",
         "eslint-plugin-jsx-a11y": "^6.2.3",
-        "eslint-plugin-sonarjs": "^0.11.0",
         "react": "^17.0.2",
         "react-dom": "^17.0.2",
         "react-scripts": "5.0.0",
diff --git a/package.json b/package.json
index 3a564c2..6e15ea2 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,6 @@
     "@testing-library/user-event": "^13.5.0",
     "eslint-config-airbnb": "^18.0.1",
     "eslint-plugin-jsx-a11y": "^6.2.3",
-    "eslint-plugin-sonarjs": "^0.11.0",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "react-scripts": "5.0.0",
diff --git a/public/index.html b/public/index.html
index aa069f2..0b43080 100644
--- a/public/index.html
+++ b/public/index.html
@@ -26,7 +26,7 @@
     -->
     <title>React App</title>
   </head>
-  <body>
+  <body class="body">
     <noscript>You need to enable JavaScript to run this app.</noscript>
     <div id="root"></div>
     <!--
diff --git a/src/App.css b/src/App.css
index 74b5e05..b7308d1 100644
--- a/src/App.css
+++ b/src/App.css
@@ -1,38 +1,19 @@
 .App {
-  text-align: center;
+  background-color: #0B0F2F;
+  border-radius: 10px;
+  height: 90vh;
+  width: 90vw;
+  box-shadow: 0 0 1em #0B0F2F;
 }
 
-.App-logo {
-  height: 40vmin;
-  pointer-events: none;
+.box_style {
+  border-radius: 10px;
+  background-color: #1E223F;
+  padding: 15px;
 }
 
-@media (prefers-reduced-motion: no-preference) {
-  .App-logo {
-    animation: App-logo-spin infinite 20s linear;
-  }
-}
-
-.App-header {
-  background-color: #282c34;
-  min-height: 100vh;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-  font-size: calc(10px + 2vmin);
-  color: white;
-}
-
-.App-link {
-  color: #61dafb;
-}
-
-@keyframes App-logo-spin {
-  from {
-    transform: rotate(0deg);
-  }
-  to {
-    transform: rotate(360deg);
-  }
+.legend {
+  font-size: 0.8em;
+  color: #5F6176;
+  font-weight: 700;
 }
diff --git a/src/App.js b/src/App.js
index 23457b7..f7767ad 100644
--- a/src/App.js
+++ b/src/App.js
@@ -1,6 +1,5 @@
-import logo from './logo.svg';
-import Header from './components/Header';
-import Main from './components/Main';
+import Header from './components/Header/Header';
+import Main from './components/Main/Main';
 import './App.css';
 
 function App() {
diff --git a/src/components/BtnGenerate/BtnGenerate.css b/src/components/BtnGenerate/BtnGenerate.css
new file mode 100644
index 0000000..0e18ef0
--- /dev/null
+++ b/src/components/BtnGenerate/BtnGenerate.css
@@ -0,0 +1,8 @@
+.btn {
+  border: none;
+  background-image: linear-gradient(to right, #697BDD, #6F52A2);
+  color: #fafafa;
+  padding: 15px;
+  border-radius: 8px;
+  font-weight: 800;
+}
diff --git a/src/components/BtnGenerate.js b/src/components/BtnGenerate/BtnGenerate.js
similarity index 71%
rename from src/components/BtnGenerate.js
rename to src/components/BtnGenerate/BtnGenerate.js
index c495b85..14637e0 100644
--- a/src/components/BtnGenerate.js
+++ b/src/components/BtnGenerate/BtnGenerate.js
@@ -1,9 +1,10 @@
 import React, { Component } from 'react';
+import './BtnGenerate.css';
 
 export default class BtnGenerate extends Component {
   render() {
     return (
-      <button type="submit">
+      <button className="btn" type="submit">
         GENERATE PASSWORD
       </button>  
     );
diff --git a/src/components/BtnGenerate/style.css b/src/components/BtnGenerate/style.css
new file mode 100644
index 0000000..e69de29
diff --git a/src/components/Checkbox.js b/src/components/Checkbox.js
deleted file mode 100644
index 8b4efc5..0000000
--- a/src/components/Checkbox.js
+++ /dev/null
@@ -1,23 +0,0 @@
-import React, { Component } from 'react';
-import PropTypes from 'prop-types';
-
-export default class Checkbox extends Component {
-  render() {
-    const { id, label } = this.props;
-
-    return (
-      <label htmlFor={ id }>
-        { label }
-        <input
-        id={ id }
-        type="checkbox"
-        />
-      </label>
-    );
-  }
-}
-
-Checkbox.propTypes = {
-  id: PropTypes.string,
-  label: PropTypes.string,
-}.isRequired;
diff --git a/src/components/Checkbox/Checkbox.css b/src/components/Checkbox/Checkbox.css
new file mode 100644
index 0000000..8ec9791
--- /dev/null
+++ b/src/components/Checkbox/Checkbox.css
@@ -0,0 +1,52 @@
+.switch {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  cursor: pointer;
+}
+
+.switch .switch-wrapper {
+  display: inline-block;
+  width: 50px;
+  height: 25px;
+  position: relative;
+}
+
+.switch .switch-wrapper .switch-button {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  border-radius: 20px;
+  background-color: #475569;
+}
+
+.switch .switch-wrapper input {
+  opacity: 0;
+  width: 0;
+  height: 0;
+}
+
+.switch .switch-wrapper .switch-button::before {
+  content: "";
+  width: 21px;
+  height: 21px;
+  position: absolute;
+  left: 2px;
+  bottom: 2px;
+  border-radius: 50%;
+  transition: .4s all ease;
+  background-color: aliceblue;
+}
+
+.switch .switch-wrapper input:checked + .switch-button {
+  background-color: #5E6BDA;
+}
+
+.switch .switch-wrapper input:checked + .switch-button::before {
+  transform: translateX(25px);
+}
diff --git a/src/components/Checkbox/Checkbox.js b/src/components/Checkbox/Checkbox.js
new file mode 100644
index 0000000..1f1e577
--- /dev/null
+++ b/src/components/Checkbox/Checkbox.js
@@ -0,0 +1,28 @@
+import React, { Component } from 'react';
+import PropTypes from 'prop-types';
+import './Checkbox.css';
+
+export default class Checkbox extends Component {
+  render() {
+    const { id, label } = this.props;
+
+    return (
+      <label className="box_style switch" htmlFor={ id }>
+        <span className="switch-text">{ label }</span>
+        <div className="switch-wrapper">
+          <input
+          id={ id }
+          type="checkbox"
+          />
+          <span className="switch-button"></span>
+        </div>
+        
+      </label>
+    );
+  }
+}
+
+Checkbox.propTypes = {
+  id: PropTypes.string,
+  label: PropTypes.string,
+}.isRequired;
diff --git a/src/components/Header/Header.css b/src/components/Header/Header.css
new file mode 100644
index 0000000..b2f6351
--- /dev/null
+++ b/src/components/Header/Header.css
@@ -0,0 +1,5 @@
+.body_header h1 {
+  font-weight: 500;
+  height: 15%;
+  padding: 15px;
+}
diff --git a/src/components/Header.js b/src/components/Header/Header.js
similarity index 74%
rename from src/components/Header.js
rename to src/components/Header/Header.js
index 6bfb4be..4dc8ed8 100644
--- a/src/components/Header.js
+++ b/src/components/Header/Header.js
@@ -1,9 +1,10 @@
 import React, { Component } from 'react';
+import './Header.css';
 
 export default class Header extends Component {
   render() {
     return (
-      <header>
+      <header className="body_header">
         <h1>Password Generator</h1>
       </header>
     );
diff --git a/src/components/LengthCaracters.js b/src/components/LengthCaracters.js
deleted file mode 100644
index 880653a..0000000
--- a/src/components/LengthCaracters.js
+++ /dev/null
@@ -1,9 +0,0 @@
-import React, { Component } from 'react';
-
-export default class LengthCaracters extends Component {
-  render() {
-    return (
-      <p>Tamanho</p>
-    );
-  }
-}
diff --git a/src/components/LengthCaracters/LengthCaracters.css b/src/components/LengthCaracters/LengthCaracters.css
new file mode 100644
index 0000000..1c00f11
--- /dev/null
+++ b/src/components/LengthCaracters/LengthCaracters.css
@@ -0,0 +1,42 @@
+.slider {
+  width: 100%;
+  -webkit-appearance: none;
+  background-color: #454760;
+  height: 15px;
+  align-self: center;
+  outline: none;
+  transition: 0.2s;
+  overflow: hidden;
+  box-shadow: inset 0 0 5px rgba(0,0,0,1);
+  border-radius: 10px;
+}
+
+.slider::-webkit-slider-thumb {
+  -webkit-appearance: none;
+  appearance: none;
+  width: 15px;
+  height: 15px;
+  border-radius: 50%;
+  background-color: #fafafa;
+  cursor: pointer;
+  z-index: 3;
+  position: relative;
+  box-shadow: -407px 0 0 400px #5E6BDA;
+}
+
+.slider::-moz-range-progress {
+  background-color: blue;
+  height: 15px;
+}
+
+.input_length {
+  display: flex;
+}
+
+.input_length .min_length {
+  margin-right: 10px;
+}
+
+.input_length .max_length {
+  margin-left: 10px;
+}
diff --git a/src/components/LengthCaracters/LengthCaracters.js b/src/components/LengthCaracters/LengthCaracters.js
new file mode 100644
index 0000000..f4123a4
--- /dev/null
+++ b/src/components/LengthCaracters/LengthCaracters.js
@@ -0,0 +1,41 @@
+import React, { Component } from 'react';
+import './LengthCaracters.css';
+
+export default class LengthCaracters extends Component {
+  constructor() {
+    super ();
+
+    this.state = {
+      length: '4',
+    }
+  }
+
+  handleChange = ({ target }) => {
+    this.setState({ length: target.value })
+  }
+
+  render() {
+    const { length } = this.state;
+
+    return (
+      <section className="main_length">
+        <p className="legend">{`LENGTH: ${ length }`}</p>
+        <div className="box_style input_length">
+          <span className="min_length">4</span>
+          <input
+            className="slider"
+            onChange={ this.handleChange }
+            type="range"
+            min="4"
+            max="32"
+            value={ length }
+          />
+          
+          <span className="max_length">32</span>
+        </div>
+        
+      </section>
+      
+    );
+  }
+}
diff --git a/src/components/Main.js b/src/components/Main.js
deleted file mode 100644
index de80b19..0000000
--- a/src/components/Main.js
+++ /dev/null
@@ -1,16 +0,0 @@
-import React, { Component } from 'react';
-import LengthCaracters from './LengthCaracters';
-import Settings from './Settings';
-
-export default class Main extends Component {
-  render() {
-    return (
-      <main>
-        <p>CLICK GENERATE</p>
-
-        <LengthCaracters />
-        <Settings />
-      </main>
-    );
-  }
-}
diff --git a/src/components/Main/Main.css b/src/components/Main/Main.css
new file mode 100644
index 0000000..29845cd
--- /dev/null
+++ b/src/components/Main/Main.css
@@ -0,0 +1,15 @@
+.body_main {
+  width: 90%;
+  display: flex;
+  flex-direction: column;
+  height: 85%;
+  justify-content: space-between;
+  margin: auto;
+}
+
+.main_password {
+  text-align: center;
+  border-radius: 10px;
+  background-color: #1E223F;
+  padding: 20px;
+}
diff --git a/src/components/Main/Main.js b/src/components/Main/Main.js
new file mode 100644
index 0000000..60ba1ea
--- /dev/null
+++ b/src/components/Main/Main.js
@@ -0,0 +1,17 @@
+import React, { Component } from 'react';
+import LengthCaracters from '../LengthCaracters/LengthCaracters';
+import Settings from '../Settings/Settings';
+import './Main.css'
+
+export default class Main extends Component {
+  render() {
+    return (
+      <main className="body_main">
+        <p className="main_password">CLICK GENERATE</p>
+
+        <LengthCaracters />
+        <Settings />
+      </main>
+    );
+  }
+}
diff --git a/src/components/Settings/Settings.css b/src/components/Settings/Settings.css
new file mode 100644
index 0000000..ea33b35
--- /dev/null
+++ b/src/components/Settings/Settings.css
@@ -0,0 +1,6 @@
+.main__form {
+  height: 70%;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+}
diff --git a/src/components/Settings.js b/src/components/Settings/Settings.js
similarity index 78%
rename from src/components/Settings.js
rename to src/components/Settings/Settings.js
index 1c2df1c..a1db8e6 100644
--- a/src/components/Settings.js
+++ b/src/components/Settings/Settings.js
@@ -1,12 +1,13 @@
 import React, { Component } from 'react';
-import Checkbox from './Checkbox';
-import BtnGenerate from './BtnGenerate';
+import Checkbox from '../Checkbox/Checkbox';
+import BtnGenerate from '../BtnGenerate/BtnGenerate';
+import './Settings.css';
 
 export default class Settings extends Component {
   render() {
     return (
       <form className="main__form">
-        <p>Settings</p>
+        <p className="legend">SETTINGS</p>
         <Checkbox
           label="Include Uppercase"
           id="settings_uppercase"
diff --git a/src/index.css b/src/index.css
index ec2585e..811b8c7 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1,13 +1,18 @@
-body {
+@import url('https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,100;0,300;0,400;0,700;0,900;1,100;1,300;1,400;1,700;1,900&display=swap');
+
+* {
   margin: 0;
-  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
-    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
-    sans-serif;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
+  padding: 0;
+  box-sizing: border-box;
 }
 
-code {
-  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
-    monospace;
+.body {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  background-color: #489BF7;
+  font-family: 'Lato', sans-serif;
+  font-size: 16px;
+  color: #fafafa;
+  height: 100vh;
 }
