styling: add basic styles to App.css

src/App.tsx

@@ -1,5 +1,6 @@
-import { Outlet } from "react-router";
+import "./styles/reset.css";
 import "./styles/App.css";
+import { Outlet } from "react-router";
 import { Link } from "react-router";
 
 function App() {

src/styles/App.css

@@ -0,0 +1,46 @@
+html {
+    font-family: Arial, sans-serif;
+}
+
+#root {
+    min-height: 100vh;
+    display: flex;
+}
+
+header {
+    flex-basis: 250px;
+    padding: 1rem;
+    border-right: 3px solid #ccc;
+    background-color: #eee;
+}
+
+main {
+    flex: 1;
+    padding: 1rem;
+}
+
+footer {
+    padding-block: 0.5rem;
+    position: absolute;
+    bottom: 0;
+    left: 0;
+    right: 0;
+
+    display: flex;
+    justify-content: center;
+}
+
+a,
+input,
+button,
+select,
+textarea {
+    font-family: inherit;
+    font-size: inherit;
+    color: inherit;
+}
+
+ul {
+    list-style: none;
+    padding: 0;
+}

src/styles/reset.css

@@ -0,0 +1,141 @@
+@layer {
+    *,
+    *::before,
+    *::after {
+        box-sizing: border-box;
+        background-repeat: no-repeat;
+    }
+
+    * {
+        padding: 0;
+        margin: 0;
+    }
+
+    html {
+        -webkit-text-size-adjust: none;
+        text-size-adjust: none;
+        line-height: 1.5;
+        -webkit-font-smoothing: antialiased;
+        block-size: 100%;
+    }
+
+    body {
+        min-block-size: 100%;
+    }
+
+    img,
+    iframe,
+    audio,
+    video,
+    canvas {
+        display: block;
+        max-inline-size: 100%;
+        block-size: auto;
+    }
+
+    svg {
+        max-inline-size: 100%;
+    }
+
+    svg:not([fill]) {
+        fill: currentColor;
+    }
+
+    input,
+    button,
+    textarea,
+    select {
+        font: inherit;
+    }
+
+    textarea {
+        resize: vertical;
+    }
+
+    fieldset,
+    iframe {
+        border: none;
+    }
+
+    p,
+    h1,
+    h2,
+    h3,
+    h4,
+    h5,
+    h6 {
+        overflow-wrap: break-word;
+    }
+
+    p {
+        text-wrap: pretty;
+        font-variant-numeric: proportional-nums;
+    }
+
+    h1,
+    h2,
+    h3,
+    h4,
+    h5,
+    h6 {
+        font-variant-numeric: lining-nums;
+    }
+
+    p,
+    blockquote,
+    q,
+    figcaption,
+    li {
+        hanging-punctuation: first allow-end last;
+    }
+
+    input,
+    label,
+    button,
+    h1,
+    h2,
+    h3,
+    h4,
+    h5,
+    h6 {
+        line-height: 1.1;
+    }
+
+    math,
+    time,
+    table {
+        font-variant-numeric: tabular-nums lining-nums slashed-zero;
+    }
+
+    code {
+        font-variant-numeric: slashed-zero;
+    }
+
+    table {
+        border-collapse: collapse;
+    }
+
+    abbr {
+        font-variant-caps: all-small-caps;
+        text-decoration: none;
+
+        &[title] {
+            cursor: help;
+            text-decoration: underline dotted;
+        }
+    }
+
+    sup,
+    sub {
+        line-height: 0;
+    }
+
+    :disabled {
+        opacity: 0.8;
+        cursor: not-allowed;
+    }
+
+    :focus-visible {
+        outline-offset: 0.2rem;
+    }
+}