Add GitHub corner, page heading and info box

Author: ADTC

.vscode/settings.json

@@ -1,3 +1,3 @@
 {
-  "cSpell.words": ["elif", "Forex", "predeploy", "TTFB", "webfonts"]
+  "cSpell.words": ["elif", "Forex", "octocat", "predeploy", "TTFB", "webfonts"]
 }

src/App.css

@@ -14,9 +14,9 @@
 }
 
 .App-header {
-  padding-block: 0.5rem;
+  padding-block: 1rem;
   background-color: #121212;
-  min-height: 100vh;
+  min-height: calc(100vh - 2rem); /* 2 x padding-block */
   display: flex;
   flex-direction: column;
   align-items: center;

src/App.tsx

@@ -6,9 +6,11 @@ import "@fontsource/roboto/700.css";
 import "./App.css";
 import { useState } from "react";
 import { ThemeProvider, createTheme } from "@mui/material/styles";
+import Alert from "@mui/material/Alert";
 import ToggleButton from "@mui/material/ToggleButton";
 import ToggleButtonGroup from "@mui/material/ToggleButtonGroup";
 import PositionCalculator, { Position } from "positions/PositionCalculator";
+import GitHubCorner from "components/GitHubCorner";
 
 const darkTheme = createTheme({
   palette: {
@@ -28,8 +30,10 @@ function App() {
 
   return (
     <div className="App">
+      <GitHubCorner />
       <header className="App-header">
         <ThemeProvider theme={darkTheme}>
+          <h3>Position Size Calculator</h3>
           <ToggleButtonGroup
             color="primary"
             value={position}
@@ -42,6 +46,9 @@ function App() {
               Short Position (Sell & Buy)
             </ToggleButton>
           </ToggleButtonGroup>
+          <Alert severity="info">
+            Fill in any three to four values and click Compute to get the rest.
+          </Alert>
           <PositionCalculator type={position} />
         </ThemeProvider>
       </header>

src/components/GitHubCorner/index.tsx

@@ -0,0 +1,35 @@
+import styles from "./styles.module.css";
+
+const title = "Discuss & Contribute on GitHub";
+
+export default function GitHubCorner() {
+  return (
+    <a
+      href="https://github.com/ADTC/simple-position-calc"
+      target="_blank"
+      rel="noreferrer"
+      className={styles.githubCorner}
+      aria-label={title}
+      title={title}
+    >
+      <svg
+        width="80"
+        height="80"
+        viewBox="0 0 250 250"
+        className={styles.svg}
+        aria-hidden="true"
+      >
+        <path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z" />
+        <path
+          d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2"
+          fill="currentColor"
+          className={styles.octocatArm}
+        />
+        <path
+          d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z"
+          fill="currentColor"
+        />
+      </svg>
+    </a>
+  );
+}

src/components/GitHubCorner/styles.module.css

@@ -0,0 +1,40 @@
+.githubCorner:hover .octocatArm {
+  animation: octocatWave 560ms ease-in-out;
+}
+
+@keyframes octocatWave {
+  0%,
+  100% {
+    transform: rotate(0);
+  }
+  20%,
+  60% {
+    transform: rotate(-25deg);
+  }
+  40%,
+  80% {
+    transform: rotate(10deg);
+  }
+}
+@media (max-width: 500px) {
+  .githubCorner:hover .octocatArm {
+    animation: none;
+  }
+  .githubCorner .octocatArm {
+    animation: octocatWave 560ms ease-in-out;
+  }
+}
+
+.svg {
+  fill: #fff;
+  color: #151513;
+  position: fixed;
+  top: 0;
+  border: 0;
+  right: 0;
+  z-index: 999;
+}
+
+.octocatArm {
+  transform-origin: 130px 106px;
+}