feat: stylization of the base layout

Author: JadsonLucena

assets/style/index.css

@@ -0,0 +1,64 @@
+* {
+    outline: none;
+    margin: 0;
+    padding: 0;
+    font-family: sans-serif;
+
+    box-sizing: border-box;
+}
+
+html, body {
+    height: 100%;
+    overflow: hidden;
+
+    scroll-behavior: smooth;
+}
+
+main {
+    position: relative;
+    width: 200%;
+    height: 400%;
+}
+    main > section {
+        position: relative;
+        float: left;
+        width: 50%;
+        height: calc(25% - 50px);
+        overflow: hidden;
+
+        display: flex;
+        flex-flow: column;
+    }
+
+footer {
+    position: fixed;
+    left: 0;
+    bottom: 0;
+    width: 100%;
+    height: 50px;
+    background-color: #24292e;
+
+    z-index: 3;
+}
+    footer > h3 {
+        display: block;
+        width: 100%;
+        height: 40%;
+        text-align: center;
+        font-weight: normal;
+        color: #fff;
+    }
+    footer > div {
+        width: 100%;
+        height: 60%;
+        text-align: center;
+        font-size: 14px;
+
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+    }
+        footer > div > a {
+            padding: 0 5px 0 10px;
+            color: #fff;
+        }