Add typography documentation, update icons and introduction

src/stories/Icons.mdx

@@ -0,0 +1,68 @@
+import { Meta, Title, IconGallery, IconItem } from '@storybook/blocks';
+
+import { ArrowIcon } from '@/components/Icons/ArrowIcon';
+import { DiscordIcon } from '@/components/Icons/DiscordIcon';
+import { ExpandIcon } from '@/components/Icons/ExpandIcon';
+import { ExternalIcon } from '@/components/Icons/ExternalIcon';
+import { FemaleIcon } from '@/components/Icons/FemaleIcon';
+import { LocationIcon } from '@/components/Icons/LocationIcon';
+import { MaleIcon } from '@/components/Icons/MaleIcon';
+import { ReceiptIcon } from '@/components/Icons/ReceiptIcon';
+import { WalletIcon } from '@/components/Icons/WalletIcon';
+
+<Meta title="Style Guide/Icons" />
+
+# Icons
+
+<IconGallery>
+    <IconItem name="Arrow">
+        <ArrowIcon />
+    </IconItem>
+    <IconItem name="Discord">
+        <DiscordIcon />
+    </IconItem>
+    <IconItem name="Expand">
+        <ExpandIcon />
+    </IconItem>
+    <IconItem name="External">
+        <ExternalIcon />
+    </IconItem>
+    <IconItem name="Female">
+        <FemaleIcon />
+    </IconItem>
+    <IconItem name="Male">
+        <MaleIcon />
+    </IconItem>
+    <IconItem name="Location">
+        <LocationIcon />
+    </IconItem>
+    <IconItem name="Receipt">
+        <ReceiptIcon />
+    </IconItem>
+    <IconItem name="Wallet">
+        <WalletIcon />
+    </IconItem>
+</IconGallery>
+
+## Usage
+
+Import these icons from the `@/components/Icons` directory.
+
+```jsx
+import { ArrowIcon } from '@/components/Icons/ArrowIcon';
+
+function MyComponent() {
+    return (
+        <div>
+            <ArrowIcon />
+            {/* Other component content */}
+        </div>
+    );
+}
+```
+
+Each icon can be customized with props including `className` and `fill` for setting the styles of the icon.
+
+```jsx
+<ArrowIcon className={styles.icon} fill="blue" />
+```

src/stories/Introduction.mdx

@@ -1,11 +1,11 @@
 import { Meta } from '@storybook/blocks';
 
-<Meta title="Getting started" />
+<Meta title="Introduction" />
 
-# Bristol Social Groups Design System
+# Bristol Social Groups Storybook
 
-This pattern library contains components used to build Bristol Social Groups. Navigate through components using the sidebar to the left. More components will be added as time goes on.
+This website documents the resources and components used to create **[bristolsocialgroups.com](https://bristolsocialgroups.com/)**.
 
-View the live site at [bristolsocialgroups.com](https://bristolsocialgroups.com/)
+Learn more about the color scheme, typography setup and iconography in the style guide section, or navigate through the components folder to see the individual components in action.
 
-Check out the source code [on GitHub](https://github.com/jhancock532/bristol-social-groups).
+The source code for Bristol Social Groups and this Storybook instance is available [on GitHub](https://github.com/jhancock532/bristol-social-groups).

src/stories/Typography.mdx

@@ -0,0 +1,106 @@
+import { Meta, Typeset } from '@storybook/blocks';
+
+<Meta title="Style Guide/Typography" />
+
+# Typography
+
+The only font used by the site is **Rubik**, which is available on [Google Fonts](https://fonts.google.com/specimen/Rubik). It is a variable sans-serif font which does not support italics. This font was chosen for this project as it conveys a formal friendliness.
+
+## Font sizes
+
+The typography for this project scales dynamically between set values depending on the size of the viewport. This has been calculated using [utopia.fyi](https://utopia.fyi/type/calculator/?c=320,16,1.333,1240,20,1.333,5,1,&s=0.75%7C0.5%7C0.25,1.5%7C2%7C3%7C4%7C6,s-l&g=s,l,xl,12).
+
+The following font sizes are measured in pixels, and represent the minimum mobile size and the maximum desktop size for each type setting, which the font will scale smoothly between.
+
+### Extra Small
+
+<Typeset
+    fontSizes={[12, 15]}
+    fontWeight={400}
+    sampleText={'Fine print and disclaimers'}
+    fontFamily={'"Rubik", Arial, sans-serif'}
+/>
+
+### Small
+
+<Typeset
+    fontSizes={[16, 20]}
+    fontWeight={400}
+    sampleText={'Body text'}
+    fontFamily={'"Rubik", Arial, sans-serif'}
+/>
+
+### Small Medium
+
+<Typeset
+    fontSizes={[19.2, 23.1]}
+    fontWeight={400}
+    sampleText={'H4 headings, hero description text'}
+    fontFamily={'"Rubik", Arial, sans-serif'}
+/>
+
+### Medium
+
+<Typeset
+    fontSizes={[21.3, 26.7]}
+    fontWeight={500}
+    sampleText={'H3 headings'}
+    fontFamily={'"Rubik", Arial, sans-serif'}
+/>
+
+### Large
+
+<Typeset
+    fontSizes={[28.4, 35.5]}
+    fontWeight={600}
+    sampleText={'H2 headings'}
+    fontFamily={'"Rubik", Arial, sans-serif'}
+/>
+
+### X Large
+
+<Typeset
+    fontSizes={[37.9, 47.4]}
+    fontWeight={700}
+    sampleText={'H1 headings, mobile'}
+    fontFamily={'"Rubik", Arial, sans-serif'}
+/>
+
+### Largest
+
+<Typeset
+    fontSizes={[50.5, 63.2]}
+    fontWeight={700}
+    sampleText={'H1 headings, desktop'}
+    fontFamily={'"Rubik", Arial, sans-serif'}
+/>
+
+## Usage
+
+Please use the following mixin to apply font sizes to your elements in SCSS:
+
+```scss
+@use 'variables' as *;
+
+@include font-size(s);
+```
+
+Where the following values are available, corresponding to the above typeset demonstrations:
+
+-   `xs`
+-   `s`
+-   `sm`
+-   `m`
+-   `l`
+-   `xl`
+-   `xxl`
+
+You can override a mobile font size with different font size on desktop, a H1 heading has the following SCSS for example:
+
+```scss
+@include font-size(xl);
+
+@include media-query(large) {
+    @include font-size(xxl);
+}
+```

src/styles/globals.scss

@@ -123,7 +123,7 @@ html,
 
 // Default sizes
 h1 {
-    @include font-size(xxxl);
+    @include font-size(xxl);
 
     font-weight: $weight-bold;
     margin: 0 0 math.div($grid, 2);