Implement dark theme (Closes #287) (#407)

* The website will have a dark theme or a light theme depending on your OS preferences. You can still customize in the `themer` page to override some properties.
* A toggle button in the footer to toggle between light mode and dark mode.
* Added a "Reset to dark mode" button in the `themer` page.

Staging link: https://csclub.uwaterloo.ca/~a3thakra/csc/dark-theme/

Co-authored-by: Miniapple8888 <miniapple8888@gmail.com>
Reviewed-on: #407
Reviewed-by: Amy <a258wang@csclub.uwaterloo.ca>

components/ArchivePage.module.css

@@ -3,7 +3,7 @@
 }
 
 .page > h1 {
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
   padding-bottom: 1rem;
 }
 

components/Bubble.module.css

@@ -6,7 +6,6 @@
 
 .bubble {
   --border-radius: calc(5000rem / 16);
-
   display: flex;
   flex-direction: row;
   position: absolute;

components/Button.module.css

@@ -2,8 +2,8 @@
 .link {
   font-family: "Poppins", "sans-serif";
   border-radius: calc(20rem / 16);
-  background-color: var(--primary-accent);
+  background-color: var(--button-background);
-  color: var(--primary-background);
+  color: var(--text-light);
   border: none;
   outline: none;
   transition-duration: 0.3s;

components/EventDescriptionCard.module.css

@@ -4,7 +4,7 @@
   max-width: calc(540rem / 16);
   padding: calc(24rem / 16);
   border-radius: calc(20rem / 16);
-  background-color: var(--primary-background);
+  background-color: var(--card-background);
 }
 
 .poster {
@@ -38,7 +38,7 @@
 
 .setting {
   margin: 0;
-  color: var(--primary-accent);
+  color: var(--link);
   font-size: calc(14rem / 16);
   font-weight: 600;
 }

components/Footer.module.css

@@ -1,6 +1,6 @@
 .footer {
   box-sizing: border-box;
-  background: var(--primary-heading);
+  background: var(--footer-background);
   padding: 1rem 0;
   width: 100%;
 }
@@ -17,7 +17,7 @@
 }
 
 .text {
-  color: var(--primary-background);
+  color: var(--text-light);
   font-style: normal;
   text-align: center;
 }

components/Footer.tsx

@@ -1,11 +1,15 @@
 import Link from "next/link";
 import React from "react";
 
+import { Button } from "./Button";
 import { SocialLinks } from "./SocialLinks";
+import { useThemeContext } from "./Theme";
 
 import styles from "./Footer.module.css";
 
 export function Footer() {
+  const themeContext = useThemeContext();
+
   return (
     <footer className={styles.footer}>
       <div className={styles.container}>
@@ -15,6 +19,16 @@ export function Footer() {
             <a className={styles.email}>exec@csclub.uwaterloo.ca</a>
           </Link>
         </div>
+        <Button
+          size="small"
+          onClick={() =>
+            themeContext?.theme.name === "dark"
+              ? themeContext?.setTheme("light")
+              : themeContext?.setTheme("dark")
+          }
+        >
+          Toggle Theme
+        </Button>
         <SocialLinks color="white" size="small" />
       </div>
     </footer>

components/Link.module.css

@@ -1,5 +1,5 @@
 .link {
-  color: var(--primary-accent);
+  color: var(--link);
   transition-duration: 0.3s;
   text-decoration: none;
   white-space: normal;
@@ -7,5 +7,5 @@
 }
 
 .link:hover {
-  color: var(--secondary-accent);
+  color: var(--link-hover);
 }

components/MiniEventCard.module.css

@@ -2,10 +2,11 @@
   box-sizing: border-box;
   position: relative;
   padding: calc(20rem / 16);
+  color: var(--text);
 }
 
-.card:nth-child(odd) {
+.darkBg {
-  background-color: var(--secondary-accent-light);
+  background-color: var(--dark-card-background);
 }
 
 .name {
@@ -61,13 +62,15 @@
   fill: var(--primary-accent);
 }
 
+
 .card h1,
 .card h2,
 .card h3,
 .card h4 {
-  font-size: calc(16rem / 16);
+  font-size: calc(18rem / 16);
   margin-top: calc(24rem / 16);
   margin-bottom: calc(8rem / 16);
+  color: var(--mini-event-card-text);
 }
 
 @media only screen and (max-width: calc(768rem / 16)) {

components/MiniEventCard.tsx

@@ -13,6 +13,7 @@ interface MiniEventCardProps {
   location: string;
   startDate: Date;
   endDate?: Date;
+  background: "dark-bg" | "normal-bg";
   year: string;
   term: string;
   slug: string;
@@ -26,12 +27,15 @@ export const MiniEventCard: React.FC<MiniEventCardProps> = ({
   startDate,
   endDate,
   online,
+  background,
   year,
   term,
   slug,
 }) => {
+  const cardBackground =
+    background === "dark-bg" ? `${styles.darkBg} ${styles.card}` : styles.card;
   return (
-    <details className={styles.card}>
+    <details className={cardBackground}>
       <summary>
         <div onClick={(event) => event.preventDefault()}>
           <h2 className={styles.name}>

components/Navbar.module.css

@@ -63,7 +63,7 @@
 }
 
 .navMenu a {
-  color: var(--primary-heading);
+  color: var(--primary-text);
   text-decoration: none;
 }
 
@@ -219,6 +219,14 @@
     cursor: pointer;
   }
 
+  .icon line {
+    stroke: var(--icon);
+  }
+
+  .icon path {
+    fill: var(--icon);
+  }
+
   .navMobileBackground {
     position: fixed;
     visibility: hidden;

components/Navbar.tsx

@@ -120,7 +120,7 @@ export function Navbar() {
           className={styles.hamburger}
           onClick={() => dispatch({ type: "open", route: router.pathname })}
         >
-          <Image src="/images/hamburger.svg" alt="Menu" />
+          <HamburgerSvg />
         </button>
         <div
           className={
@@ -263,7 +263,7 @@ function NavItem(props: NavItemProps) {
             }
             onClick={() => props.onToggle(props.route)}
           >
-            <Image src="/images/dropdown-icon.svg" alt="Dropdown Icon" />
+            <DropdownSvg />
           </button>
           <ul
             className={
@@ -348,3 +348,64 @@ function getMainRoute(route: string) {
   }
   return "/" + route.split("/")[1];
 }
+
+function HamburgerSvg() {
+  return (
+    <svg
+      width="30"
+      height="23"
+      viewBox="0 0 30 23"
+      className={styles.icon}
+      xmlns="http://www.w3.org/2000/svg"
+    >
+      <line
+        x1="28"
+        y1="2"
+        x2="2"
+        y2="2"
+        stroke="#2A2A62"
+        strokeWidth="4"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <line
+        x1="28"
+        y1="11.375"
+        x2="2"
+        y2="11.375"
+        stroke="#2A2A62"
+        strokeWidth="4"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <line
+        x1="28"
+        y1="20.75"
+        x2="2"
+        y2="20.75"
+        stroke="#2A2A62"
+        strokeWidth="4"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+    </svg>
+  );
+}
+
+function DropdownSvg() {
+  return (
+    <svg
+      width="14"
+      height="9"
+      viewBox="0 0 14 9"
+      fill="none"
+      className={styles.icon}
+      xmlns="http://www.w3.org/2000/svg"
+    >
+      <path
+        d="M7.75593 8.12713C7.35716 8.58759 6.64284 8.58759 6.24407 8.12713L0.638743 1.65465C0.0778675 1.00701 0.537921 0 1.39467 0L12.6053 0C13.4621 0 13.9221 1.00701 13.3613 1.65465L7.75593 8.12713Z"
+        fill="#2A2A62"
+      />
+    </svg>
+  );
+}

components/NewsCard.module.css

@@ -1,7 +1,7 @@
 .card {
   padding: calc(30rem / 16) calc(40rem / 16);
   max-width: calc(524rem / 16);
-  background-color: var(--primary-background);
+  background-color: var(--card-background);
   border-radius: calc(20rem / 16);
   margin-bottom: 1rem;
 }
@@ -10,15 +10,17 @@
   max-width: unset;
   padding: unset;
   border-radius: unset;
+  background-color: var(--primary-background);
 }
 
 .date {
   font-size: calc(18rem / 16);
   margin: 0;
+  color: var(--primary-subtitle);
 }
 
 .author {
-  color: var(--secondary-heading);
+  color: var(--author-text);
   font-style: normal;
 }
 

components/OrganizedContent.module.css

@@ -30,7 +30,7 @@
   margin: calc(8rem / 16) calc(32rem / 16) calc(20rem / 16) 0;
   height: calc(100vh - (44rem / 16));
 
-  color: var(--primary-heading);
+  color: var(--sidebar-text);
   font-weight: 500;
 }
 
@@ -55,10 +55,14 @@
 
 .selected {
   background-color: var(--primary-accent-lightest);
-  color: var(--primary-accent);
+  color: var(--primary-heading);
   font-weight: 700;
 }
 
+.selected div {
+  color: var(--primary-heading);
+}
+
 .readAll {
   font-weight: 700;
 }
@@ -69,7 +73,7 @@
 
 .selected .marker {
   display: inline;
-  background-color: var(--primary-accent);
+  background-color: var(--marker);
   height: calc(24rem / 16);
   width: calc(4rem / 16);
   margin-right: 1rem;

components/OrganizedContent/Header.module.css

@@ -8,12 +8,12 @@
   flex-direction: row;
   align-items: flex-end;
   padding-bottom: 1rem;
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
 }
 
 .header {
   line-height: 1;
-  color: var(--primary-heading);
+  color: var(--primary-title);
   font-size: calc(48rem / 16);
   margin: 0 0 0 calc(36rem / 16);
   text-align: center;

components/SocialLinks.module.css

@@ -22,5 +22,5 @@
 }
 
 .white {
-  fill: var(--primary-background);
+  fill: var(--text-light);
 }

components/SocialLinks.tsx

@@ -77,7 +77,7 @@ function InstagramSvg(color: string) {
       xmlns="http://www.w3.org/2000/svg"
     >
       <linearGradient id="bluegreen-gradient">
-        <stop offset="0%" stopColor="#1481E3" />
+        <stop offset="0%" stopColor="var(--blue-gradient)" />
         <stop offset="100%" stopColor="#4ED4B2" />
       </linearGradient>
       <path
@@ -101,7 +101,7 @@ function DiscordSvg(color: string) {
       version="1.1"
     >
       <linearGradient id="bluegreen-gradient">
-        <stop offset="0%" stopColor="#1481E3" />
+        <stop offset="0%" stopColor="var(--blue-gradient)" />
         <stop offset="100%" stopColor="#4ED4B2" />
       </linearGradient>
       <g id="surface1">
@@ -125,7 +125,7 @@ function TwitchSvg(color: string) {
       xmlns="http://www.w3.org/2000/svg"
     >
       <linearGradient id="bluegreen-gradient">
-        <stop offset="0%" stopColor="#1481E3" />
+        <stop offset="0%" stopColor="var(--blue-gradient)" />
         <stop offset="100%" stopColor="#4ED4B2" />
       </linearGradient>
       <g clipPath="url(#clip0)">
@@ -170,7 +170,7 @@ function FacebookSvg(color: string) {
       xmlns="http://www.w3.org/2000/svg"
     >
       <linearGradient id="bluegreen-gradient">
-        <stop offset="0%" stopColor="#1481E3" />
+        <stop offset="0%" stopColor="var(--blue-gradient)" />
         <stop offset="100%" stopColor="#4ED4B2" />
       </linearGradient>
       <path
@@ -194,7 +194,7 @@ function LiberaSvg(color: string) {
       xmlns="http://www.w3.org/2000/svg"
     >
       <linearGradient id="bluegreen-gradient">
-        <stop offset="0%" stopColor="#1481E3" />
+        <stop offset="0%" stopColor="var(--blue-gradient)" />
         <stop offset="100%" stopColor="#4ED4B2" />
       </linearGradient>
       <path

components/Table.module.css

@@ -7,7 +7,7 @@
 }
 
 .table thead tr {
-  background: var(--secondary-accent-light);
+  background: var(--table-header);
 }
 
 .table tbody tr {
@@ -15,8 +15,8 @@
   vertical-align: top;
 }
 
-.table tbody tr:nth-child(odd) {
+.table tbody tr:nth-child(even) {
-  background: var(--primary-accent-lightest);
+  background: var(--table-section);
 }
 
 .table th {

components/Theme.tsx

@@ -29,9 +29,17 @@ export const PALETTE_NAMES = [
   "--secondary-accent-light",
 
   "--primary-heading",
-  "--secondary-heading",
 
+  "--primary-title",
+  "--primary-subtitle",
+  "--secondary-subtitle",
+
+  "--primary-text",
   "--text",
+  "--text-light",
+  "--author-text",
+  "--sidebar-text",
+  "--mini-event-card-text",
 
   "--form-invalid",
   "--warning-background",
@@ -41,9 +49,24 @@ export const PALETTE_NAMES = [
   "--input-placeholder-text",
   "--input-text",
 
+  "--icon",
+
   "--code-background",
+  "--button-background",
+  "--footer-background",
+  "--card-background",
+  "--dark-card-background",
+  "--table-header",
+  "--table-section",
 
   "--navbar-page-overlay",
+
+  "--link",
+  "--link-hover",
+
+  "--blue-gradient",
+  "--border",
+  "--marker",
 ] as const;
 
 export const emptyPalette = PALETTE_NAMES.reduce(
@@ -77,15 +100,9 @@ export function ThemeProvider(props: Props) {
   const setTheme = (input: SetThemeInput) => {
     if (typeof input === "string") {
       PALETTE_NAMES.forEach((name) =>
-        document.body.style.setProperty(name, "")
+        document.body.style.setProperty(name, "var(--" + input + name + ")")
       );
-
+      savePalette(getCurrentPalette(input));
-      if (input === "light") {
-        document.body.classList.remove("dark");
-      } else if (input === "dark") {
-        document.body.classList.add("dark");
-      }
-
       setThemeName(input);
     } else {
       const properties = Object.keys(input) as PaletteNames[];
@@ -107,7 +124,14 @@ export function ThemeProvider(props: Props) {
     const customPalette = getSavedPalette();
 
     if (customPalette == null) {
-      setThemeName("light");
+      const prefersDark = window.matchMedia(
+        "(prefers-color-scheme: dark)"
+      ).matches;
+      if (prefersDark) {
+        setTheme("dark");
+      } else {
+        setTheme("light");
+      }
     } else {
       setTheme(customPalette);
       setThemeName("custom");
@@ -124,11 +148,11 @@ export function ThemeProvider(props: Props) {
               theme: {
                 name: themeName,
                 get palette() {
-                  return getCurrentPalette();
+                  return getCurrentPalette(themeName);
                 },
               },
               setTheme,
-              save: () => savePalette(getCurrentPalette()),
+              save: () => savePalette(getCurrentPalette(themeName)),
               clearSaved: clearSavedPalette,
             }
       }
@@ -148,13 +172,30 @@ export type Palette = {
   [key in PaletteNames]: string;
 };
 
-function getCurrentPalette() {
+function themePropertyName(
-  const styles = getComputedStyle(document.body);
+  name: PaletteNames,
+  themeName: BuiltInThemes
+): string {
+  return `--${themeName}${name}`;
+}
 
+function getCurrentPalette(themeName: string) {
+  const styles = getComputedStyle(document.body);
+  if (themeName === "light" || themeName === "dark") {
+    return PALETTE_NAMES.reduce(
+      (partial, name) => ({
+        ...partial,
+        [name]: styles
+          .getPropertyValue(themePropertyName(name, themeName))
+          .trim(),
+      }),
+      {} as Palette
+    );
+  }
   return PALETTE_NAMES.reduce(
-    (partial, varName) => ({
+    (partial, name) => ({
       ...partial,
-      [varName]: styles.getPropertyValue(varName).trim(),
+      [name]: styles.getPropertyValue(name).trim(),
     }),
     {} as Palette
   );

lib/news.ts

@@ -88,7 +88,7 @@ export async function getNewsBySlug(
     metadata: {
       ...metadata,
       date: getLocalDateFromEST(
-        parse(metadata.date, DATE_FORMAT, new Date())
+        parse(metadata.date as string, DATE_FORMAT, new Date())
       ).toString(),
       permalink: `/news/${year}/${term}/${slugDate}`,
     } as Metadata,

lib/team.ts

@@ -96,7 +96,7 @@ export async function getExec(name: string, pos: string, convert = true) {
     const raw = await readFile(path.join(EXECS_PATH, `${name}${FILETYPE}`));
     ({ content, data: metadata } = matter(raw));
 
-    const image = await getMemberImagePath(metadata.name);
+    const image = await getMemberImagePath(metadata.name as string);
 
     return {
       content: convert ? await serialize(content) : content,

package.json

@@ -41,14 +41,14 @@
     "@types/mdx-js__react": "^1.5.3",
     "@types/node": "^16.9.1",
     "@types/react": "^17.0.14",
-    "@typescript-eslint/eslint-plugin": "4.28.4",
+    "@typescript-eslint/eslint-plugin": "5.22.0",
-    "@typescript-eslint/parser": "4.28.4",
+    "@typescript-eslint/parser": "5.22.0",
-    "eslint": "7.32.0",
+    "eslint": "8.14.0",
-    "eslint-config-prettier": "^8.3.0",
+    "eslint-config-prettier": "^8.5.0",
-    "eslint-plugin-import": "^2.24.0",
+    "eslint-plugin-import": "^2.26.0",
-    "eslint-plugin-prettier": "^3.4.0",
+    "eslint-plugin-prettier": "^4.0.0",
-    "eslint-plugin-react": "7.24.0",
+    "eslint-plugin-react": "7.29.4",
-    "eslint-plugin-react-hooks": "^4.2.0",
+    "eslint-plugin-react-hooks": "^4.5.0",
     "gray-matter": "^4.0.3",
     "ical-generator": "^3.0.0",
     "postcss": "^8.3.0",
@@ -56,6 +56,6 @@
     "postcss-flexbugs-fixes": "^5.0.2",
     "postcss-preset-env": "^7.0.0",
     "ts-node": "^10.2.1",
-    "typescript": "4.3.5"
+    "typescript": "4.6.4"
   }
 }

pages/_app.css

@@ -4,34 +4,161 @@ html {
 
 body {
   /* Default is light theme */
-  --primary-background: #ffffff;
+  --light--primary-background: #ffffff;
-  --secondary-background: #fdf8f5;
+  --light--secondary-background: #fdf8f5;
 
-  --primary-accent: #1482e3;
+  --light--primary-accent: #1482e3;
-  --primary-accent-soft: #5caff9;
+  --light--primary-accent-soft: #5caff9;
-  --primary-accent-light: #c4e0f8;
+  --light--primary-accent-light: #c4e0f8;
-  --primary-accent-lighter: #e1eefa;
+  --light--primary-accent-lighter: #e1eefa;
-  --primary-accent-lightest: #f7fbff;
+  --light--primary-accent-lightest: #f7fbff;
 
-  --secondary-accent: #4ed4b2;
+  --light--secondary-accent: #4ed4b2;
-  --secondary-accent-light: #dcf6f0;
+  --light--secondary-accent-light: #dcf6f0;
 
-  --primary-heading: #2a2a62;
+  --light--primary-heading: #2a2a62;
-  --secondary-heading: #525284;
 
-  --text: #000000;
+  --light--primary-text: #2a2a62;
+  --light--text: #000000;
+  --light--text-light: #FFFFFF;
+  --light--sidebar-text: #2a2a62;
+  --light--author-text: #525284;
+  --light--mini-event-card-text: #000000;
 
-  --form-invalid: #9f616a;
+  --light--primary-title: #2a2a62;
-  --warning-background: #dd0014;
+  --light--primary-subtitle: #2a2a62;
-  --warning-text: #ffffff;
+  --light--secondary-subtitle: #2a2a62;
 
-  --input-background: #f0f0f0;
+  --light--form-invalid: #9f616a;
-  --input-placeholder-text: #bbbbbb;
+  --light--warning-background: #dd0014;
-  --input-text: #6b6b6b;
+  --light--warning-text: #ffffff;
 
-  --code-background: #f0f0f0;
+  --light--link: #1482e3;
+  --light--link-hover: #4ed3b2;
 
-  --navbar-page-overlay: #787878b2;
+  --light--input-background: #f0f0f0;
+  --light--input-placeholder-text: #bbbbbb;
+  --light--input-text: #6b6b6b;
+
+  --light--icon: #2A2A62;
+
+  --light--navbar-page-overlay: hsla(0,0%,47.1%,0.6980392156862745);
+  --light--code-background: #f0f0f0;
+
+  --light--button-background: #1482e3;
+  --light--footer-background: #2a2a62;
+  --light--card-background: #FFFFFF;
+  --light--dark-card-background: #DCF6F0;
+  --light--table-header: #DCF6F0;
+  --light--table-section: #f7fbff;
+
+  --light--blue-gradient: #1481E3;
+  --light--border: #2a2a62;
+  --light--marker: #1482e3;
+
+  --dark--primary-background: #171729;
+  --dark--secondary-background: #252542;
+
+  --dark--primary-accent: #5CAFF9;
+  --dark--primary-accent-soft: #5cb0f9;
+  --dark--primary-accent-light: #252542;
+  --dark--primary-accent-lighter: #171729;
+  --dark--primary-accent-lightest: #464671;
+
+  --dark--secondary-accent: #4ed3b2;
+  --dark--secondary-accent-light: #525284;
+
+  --dark--primary-heading: #fcf7f4;
+
+  --dark--form-invalid: #9f616a;
+  --dark--warning-background: #dd0014;
+  --dark--warning-text: #ffffff; 
+
+  --dark--link: #4ED4B2;
+  --dark--link-hover: #C1F0E4;
+
+  --dark--primary-text: #ffffff;
+  --dark--text: #AFAFD3;
+  --dark--text-light: #FFFFFF;
+  --dark--sidebar-text: #AFAFD3;
+  --dark--author-text: #ABABF2;
+  --dark--mini-event-card-text: #5CAFF9;
+
+  --dark--input-background: #C4C4C4;
+  --dark--input-placeholder-text: #bbbbbb;
+  --dark--input-text: #6b6b6b;
+
+  --dark--icon: #ffffff;
+
+  --dark--primary-title: #5CAFF9;
+  --dark--primary-subtitle: #E0E0F7;
+  --dark--secondary-subtitle: #ABABF2;
+
+  --dark--navbar-page-overlay: rgba(0, 0, 0, 0.7);
+  --dark--code-background: #3d3d68;
+
+  --dark--button-background: #1482e3;
+  --dark--footer-background: #525284;
+  --dark--card-background: #272751;
+  --dark--dark-card-background: #272751;
+  --dark--table-header: #252542;
+  --dark--table-section: #202037;
+
+  --dark--blue-gradient: #5CAFF9;
+  --dark--border: #2A2A62;
+  --dark--marker: #C5C5F0;
+
+  --primary-background: var(--light--primary-background);
+  --secondary-background: var(--light--secondary-background);
+
+  --primary-accent: var(--light--primary-accent);
+  --primary-accent-soft: var(--light--primary-accent-soft);
+  --primary-accent-light: var(--light--primary-accent-light);
+  --primary-accent-lighter: var(--light--primary-accent-lighter);
+  --primary-accent-lightest: var(--light--primary-accent-lightest);
+
+  --secondary-accent: var(--light--secondary-accent);
+  --secondary-accent-light: var(--light--secondary-accent-light);
+
+  --primary-heading: var(--light--primary-heading);
+
+  --form-invalid: var(--light--form-invalid);
+  --warning-background: var(--light--warning-background);
+  --warning-text: var(--light--warning-text);
+
+  --link: var(--light--link);
+  --link-hover: var(--light--link-hover);
+
+  --primary-text: var(--light--primary-text);
+  --text: var(--light--text);
+  --text-light: var(--light--text-light);
+  --sidebar-text: var(--light--sidebar-text);
+  --author-text: var(--light--author-text);
+  --mini-event-card-text: var(--light--mini-event-card-text);
+
+  --input-background: var(--light--input-background);
+  --input-placeholder-text: var(--light--input-placeholder-text);
+  --input-text: var(--light--input-text);
+
+  --icon: var(--light--icon);
+
+  --primary-title: var(--light--primary-title);
+  --primary-subtitle: var(--light--primary-subtitle);
+  --secondary-subtitle: var(--light--secondary-subtitle);
+
+  --navbar-page-overlay: var(--light--navbar-page-overlay);
+  --code-background: var(--light--code-background);
+
+  --button-background: var(--light--button-background);
+  --footer-background: var(--light--footer-background);
+  --card-background: var(--light--card-background);
+  --dark-card-background: var(--light--dark-card-background);
+  --table-header: var(--light--table-header);
+  --table-section: var(--light--table-section);
+
+  --blue-gradient: var(--light--blue-gradient);
+  --border: var(--light--border);
+  --marker: var(--light--marker);
 
   background-color: var(--primary-background);
   color: var(--text);
@@ -47,10 +174,6 @@ input {
   font-family: "Poppins", "sans-serif";
 }
 
-.dark {
-  /* FIXME: Implement dark theme */
-}
-
 h1,
 h2,
 h3,
@@ -117,3 +240,58 @@ h4 + * {
     font-weight: 600;
   }
 }
+
+@media only screen and (prefers-color-scheme: dark) {
+  body {
+    --primary-background: var(--dark--primary-background);
+    --secondary-background: var(--dark--secondary-background);
+
+    --primary-accent: var(--dark--primary-accent);
+    --primary-accent-soft: var(--dark--primary-accent-soft);
+    --primary-accent-light: var(--dark--primary-accent-light);
+    --primary-accent-lighter: var(--dark--primary-accent-lighter);
+    --primary-accent-lightest: var(--dark--primary-accent-lightest);
+
+    --secondary-accent: var(--dark--secondary-accent);
+    --secondary-accent-light: var(--dark--secondary-accent-light);
+
+    --primary-heading: var(--dark--primary-heading);
+
+    --form-invalid: var(--dark--form-invalid);
+    --warning-background: var(--dark--warning-background);
+    --warning-text: var(--dark--warning-text);
+
+    --link: var(--dark--link);
+    --link-hover: var(--dark--link-hover);
+
+    --primary-text: var(--dark--primary-text);
+    --text: var(--dark--text);
+    --text-light: var(--dark--text-light);
+    --sidebar-text: var(--dark--sidebar-text);
+    --author-text: var(--dark--author-text);
+    --mini-event-card-text: var(--dark--mini-event-card-text);
+
+    --input-background: var(--dark--input-background);
+    --input-placeholder-text: var(--dark--input-placeholder-text);
+    --input-text: var(--dark--input-text);
+
+    --icon: var(--dark--icon);
+
+    --primary-title: var(--dark--primary-title);
+    --primary-subtitle: var(--dark--primary-subtitle);
+    --secondary-subtitle: var(--dark--secondary-subtitle);
+
+    --navbar-page-overlay: var(--dark--navbar-page-overlay);
+    --code-background: var(--dark--code-background);
+
+    --button-background: var(--dark--button-background);
+    --footer-background: var(--dark--footer-background);
+    --card-background: var(--dark--card-background);
+    --table-header: var(--dark--table-header);
+    --table-section: var(--dark--table-section);
+
+    --blue-gradient: var(--dark--blue-gradient);
+    --border: var(--dark--border);
+    --marker: var(--dark--marker);
+  }
+}

pages/about/index.module.css

@@ -6,6 +6,7 @@
   height: calc(80rem / 16);
   margin-top: auto;
   padding-left: calc(20rem / 16);
+  color: var(--primary-title);
 }
 
 .content {

pages/about/members.module.css

@@ -1,6 +1,14 @@
+.title {
+  color: var(--primary-title);
+}
+
 .table {
   display: table;
   width: 100%;
   margin-top: calc(20rem / 16);
   margin-bottom:  calc(60rem / 16);
 }
+
+.table thead {
+  background-color: var(--table-header);
+}

pages/about/members.tsx

@@ -20,7 +20,7 @@ export default function Members(props: Props) {
   return (
     <>
       <Title>Members</Title>
-      <h1>Members</h1>
+      <h1 className={styles.title}>Members</h1>
       <p>
         {`The members for ${capitalize(props.term)} ${
           props.year

pages/about/our-supporters.module.css

@@ -7,11 +7,11 @@
   flex-direction: row;
   align-items: flex-end;
   padding-bottom: 1rem;
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
 }
 
 .header {
-  color: var(--primary-heading);
+  color: var(--primary-title);
   margin: 0 1rem 0 0;
   text-align: center;
 }

pages/about/team.module.css

@@ -2,7 +2,7 @@
   display: flex;
   flex-direction: row;
   padding-bottom: calc(24rem / 16);
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
   margin-bottom: calc(46rem / 16);
 }
 
@@ -15,7 +15,7 @@
 }
 
 .header {
-  color: var(--primary-heading);
+  color: var(--primary-title);
   font-size: calc(48rem / 16);
   margin: 0 calc(53rem / 16) 0 0;
 }
@@ -25,7 +25,7 @@
   font-size: calc(36rem / 16);
   font-weight: 600;
   padding-bottom: calc(22rem / 16);
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
   margin-bottom: calc(46rem / 16);
   margin-top: calc(86rem / 16);
 }

pages/events/[year]/[term]/index.module.css

@@ -4,8 +4,9 @@
 
 .main > h1,
 .main > section > h1 {
+  color: var(--primary-title);
   padding-bottom: calc(16rem / 16);
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
 }
 
 .header {

pages/events/[year]/[term]/index.tsx

@@ -99,15 +99,18 @@ export default function TermPage(props: Props) {
             </h1>
           )}
           <div className={styles.miniEventCards}>
-            {props.pastEvents.map(({ content, metadata }) => (
+            {props.pastEvents.map((event, idx) => (
               <MiniEventCard
-                {...metadata}
+                {...event.metadata}
-                startDate={new Date(metadata.startDate)}
+                startDate={new Date(event.metadata.startDate)}
                 endDate={
-                  metadata.endDate ? new Date(metadata.endDate) : undefined
+                  event.metadata.endDate
+                    ? new Date(event.metadata.endDate)
+                    : undefined
                 }
-                description={<MDXRemote {...content} />}
+                description={<MDXRemote {...event.content} />}
-                key={metadata.name + metadata.startDate.toString()}
+                key={event.metadata.name + event.metadata.startDate.toString()}
+                background={idx % 2 === 0 ? "dark-bg" : "normal-bg"}
               />
             ))}
           </div>

pages/events/[year]/index.module.css

@@ -4,7 +4,7 @@
 
 .main > h1 {
   padding-bottom: calc(16rem / 16);
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
 }
 
 .blue {

pages/get-involved.module.css

@@ -5,11 +5,11 @@
 .page > header {
   display: flex;
   flex-direction: row;
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
 }
 
 .headerText > h1 {
-  color: var(--primary-heading);
+  color: var(--primary-title);
   margin: 0 0 calc(8rem / 16) 0;
 }
 

pages/index.module.css

@@ -56,7 +56,7 @@
 .clubDescription {
   margin-bottom: calc(50rem / 16);
   text-align: center;
-  color: var(--primary-heading);
+  color: var(--primary-text);
 }
 
 .clubDescription br {

pages/news/[year]/[term].module.css

@@ -4,7 +4,7 @@
 
 .page > h1 {
   padding-bottom: calc(16rem / 16);
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
 }
 
 .term {

pages/resources/advice/co-op.module.css

@@ -4,11 +4,12 @@
   justify-content: space-between;
   align-items: flex-end;
   padding-bottom: calc(32rem / 16);
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
 }
 
 .title {
   padding-right: calc(40rem / 16);
+  color: var(--primary-title);
 }
 
 .adviceBarContainer {
@@ -30,10 +31,22 @@ a.currentAdvice {
   color: var(--primary-accent);
 }
 
+.adviceBarContainer a:hover {
+  color: var(--link-hover);
+}
+
 .content {
   padding-bottom: calc(48rem / 16);
 }
 
+.content h3 {
+  color: var(--primary-subtitle);
+}
+
+.content h4 {
+  color: var(--secondary-subtitle);
+}
+
 @media only screen and (max-width: calc(768rem / 16)) {
   .titleContainer {
     flex-direction: column-reverse;

pages/resources/tech-talks/index.module.css

@@ -8,7 +8,7 @@
   align-items: flex-end;
   padding-bottom: 1rem;
   margin-bottom: calc(40rem / 16);
-  border-bottom: calc(1rem / 16) solid var(--primary-heading);
+  border-bottom: calc(1rem / 16) solid var(--border);
 }
 
 .header {
@@ -16,7 +16,7 @@
 }
 
 .header h1 {
-  color: var(--primary-heading);
+  color: var(--primary-title);
   margin: 0 1rem 0 0;
   text-align: left;
 }

pages/themer.tsx

@@ -26,6 +26,15 @@ export default function Themer() {
           >
             Reset to light mode
           </Button>
+          <Button
+            type="reset"
+            onClick={() => {
+              context?.clearSaved();
+              context?.setTheme("dark");
+            }}
+          >
+            Reset to dark mode
+          </Button>
           <Button type="submit" onClick={() => context?.save()}>
             Save
           </Button>