feat: implement global styles

@types/styled.d.ts

@@ -0,0 +1,9 @@
+import 'styled-components';
+
+import { theme } from 'styles/theme';
+
+export type Theme = typeof theme;
+
+declare module 'styled-components' {
+  export interface DefaultTheme extends Theme {}
+}

src/pages/_app.js → pages/_app.tsx

@@ -1,13 +1,13 @@
 import { ThemeProvider } from 'styled-components';
 
-import { theme } from '../styles/theme';
-import GlobalStyle from '../styles/globals';
+import { theme } from 'styles/theme';
+import GlobalStyles from 'styles/global';
 
 function MyApp({ Component, pageProps }) {
   return (
     <ThemeProvider theme={theme}>
       <Component {...pageProps} />
-      <GlobalStyle />
+      <GlobalStyles />
     </ThemeProvider>
   );
 }

src/pages/_document.js → pages/_document.tsx

@@ -1,8 +1,17 @@
-import Document, { Html, Head, Main, NextScript } from 'next/document';
+import Document, {
+  DocumentInitialProps,
+  DocumentContext,
+  Html,
+  Head,
+  Main,
+  NextScript,
+} from 'next/document';
 import { ServerStyleSheet } from 'styled-components';
 
 export default class MyDocument extends Document {
-  static async getInitialProps(ctx) {
+  static async getInitialProps(
+    ctx: DocumentContext,
+  ): Promise<DocumentInitialProps> {
     const sheet = new ServerStyleSheet();
     const originalRenderPage = ctx.renderPage;
 

styles/global.ts

@@ -0,0 +1,27 @@
+import { createGlobalStyle } from 'styled-components';
+
+export default createGlobalStyle`
+  * {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+  }
+
+  body {
+    background: ${({ theme }) => theme.colors.background};
+    color: ${({ theme }) => theme.colors.black};
+
+    font-family: 'Roboto',sans-serif;
+    font-size: 1rem;
+    font-weight: 400;
+  }
+
+  input,
+  button {
+    outline: 0;
+  }
+
+  button {
+    cursor: pointer;
+  }
+`;

styles/theme/colors.ts

@@ -0,0 +1,9 @@
+export const colors = {
+  background: '#055388',
+  white: '#ffffff',
+  black: '#000000',
+  'black-secondary': '#212121',
+  alto: '#dbdbdb',
+  title: '#2e384d',
+  green: 'rgb(81, 215, 100)',
+};

styles/theme/index.ts

@@ -0,0 +1,5 @@
+import { colors } from './colors';
+
+export const theme = {
+  colors,
+};