diff --git a/src/routes/sunrise-sunset/+page.svelte b/src/routes/sunrise-sunset/+page.svelte
index 7a76213..2c8547f 100644
--- a/src/routes/sunrise-sunset/+page.svelte
+++ b/src/routes/sunrise-sunset/+page.svelte
@@ -1,69 +1,153 @@
 <script lang="ts">
   import type { PageData } from "./$types.js";
-  import Navbar from "$lib/components/Navbar.svelte";
+  import { format as formatDate } from "date-fns";
+  import { onMount } from "svelte";
   import { writable } from "svelte/store";
+  import Navbar from "$lib/components/Navbar.svelte";
+
+  import type { ISunriseSunsetGuessingHistory } from "./ISunriseSunsetGuessingHistory.js";
+
+  let hasGuessingHistoryBeenLoaded = false;
+  const guessingHistory = writable<ISunriseSunsetGuessingHistory>({
+    mostRecentGuessDate: undefined,
+    totalNumberOfGuesses: 0,
+    guesses: [],
+    correctDays: [],
+    incorrectDays: []
+  });
 
   export let data: PageData;
+  const now = new Date();
+  const todaysDateString = formatDate(now, "yyyy-MM-dd");
+  const localStorageKey = "sunrise-sunset-guessing-history";
 
   $: picture = data.body.photo;
 
-  const guessHistory = writable({
-    correct: 0,
-    incorrect: 0,
-    total: 0
+  function onOptionSelected(option: "sunrise" | "sunset") {
+    $guessingHistory.mostRecentGuessDate = todaysDateString;
+    $guessingHistory.totalNumberOfGuesses += 1;
+    $guessingHistory.guesses = [...$guessingHistory.guesses, option];
+
+    if (option === picture.sunrise_or_sunset) {
+      $guessingHistory.correctDays = [
+        ...$guessingHistory.correctDays,
+        todaysDateString
+      ];
+    } else {
+      $guessingHistory.incorrectDays = [
+        ...$guessingHistory.incorrectDays,
+        todaysDateString
+      ];
+    }
+  }
+
+  guessingHistory.subscribe((value) => {
+    console.log("guessingHistory.subscribe", value);
+
+    if (!hasGuessingHistoryBeenLoaded) {
+      return;
+    }
+
+    localStorage.setItem(localStorageKey, JSON.stringify(value));
   });
 
-  function onOptionSelected(option: "sunrise" | "sunset") {
-    $guessHistory.total += 1;
-    if (option === picture.sunrise_or_sunset) {
-      $guessHistory.correct += 1;
-    } else {
-      $guessHistory.incorrect += 1;
+  onMount(() => {
+    const storedGuessHistory = localStorage.getItem(localStorageKey);
+    if (storedGuessHistory) {
+      guessingHistory.set(JSON.parse(storedGuessHistory));
     }
-    console.log(option);
-  }
+    hasGuessingHistoryBeenLoaded = true;
+  });
 </script>
 
 <Navbar />
 
-<section class="header">
-  <h1>Sunrise, Sunset?</h1>
-</section>
-
-<section class="picture">
-  <img src={picture.small_url} alt="Sunrise or Sunset?" />
-</section>
-
-<section class="options">
-  <div class="options__buttons-container">
-    <button class="options__button" on:click={() => onOptionSelected("sunrise")}
-      >Sunrise</button
-    >
-    <button class="options__button" on:click={() => onOptionSelected("sunset")}
-      >Sunset</button
-    >
-  </div>
-</section>
-
-<section class="score">
-  {#if $guessHistory.total > 0}
-    <p class="score__text">
-      You've guessed correctly {Number(
-        $guessHistory.correct / $guessHistory.total
-      )}% of the time
+<div class="page">
+  <section class="header">
+    <h1 class="header__title">Sunrise, Sunset?</h1>
+    <p class="header__explanation">
+      It's a simple game. Is the picture below a sunrise, or a sunet?
     </p>
-  {:else}
-    <p class="score__text">You've not guessed yet.</p>
+  </section>
+
+  <section class="picture">
+    <img src={picture.small_url} alt="Sunrise or Sunset?" />
+  </section>
+
+  {#if hasGuessingHistoryBeenLoaded}
+    <section class="options">
+      <div class="options__buttons-container">
+        <button
+          disabled={$guessingHistory.mostRecentGuessDate === todaysDateString}
+          class="options__button option--sunrise"
+          on:click={() => onOptionSelected("sunrise")}>Sunrise</button
+        >
+        <button
+          disabled={$guessingHistory.mostRecentGuessDate === todaysDateString}
+          class="options__button option--sunset"
+          id="button-sunset"
+          on:click={() => onOptionSelected("sunset")}>Sunset</button
+        >
+      </div>
+      {#if $guessingHistory.mostRecentGuessDate === todaysDateString}
+        <p class="options__text">
+          You've already guessed today. Come back tomorrow.
+        </p>
+      {/if}
+    </section>
+
+    <section class="score">
+      <div class="score__card">
+        <h2 class="score__title">Your Score</h2>
+        {#if $guessingHistory.mostRecentGuessDate !== undefined}
+          <p class="score__text">
+            You've guessed correctly {Number(
+              $guessingHistory.correctDays.length /
+                $guessingHistory.totalNumberOfGuesses
+            ) * 100}% of the time
+          </p>
+        {:else}
+          <p class="score__text">You've not guessed yet.</p>
+        {/if}
+      </div>
+    </section>
   {/if}
-</section>
+</div>
 
 <style lang="scss" type="text/postcss">
+  :root {
+    --background-colour: hsl(40, 8%, 85%);
+    --colour-light-grey: hsl(28, 35%, 85%);
+    --colour-grey: hsl(20, 6%, 10%);
+    --colour-grey-lightened: hsl(20, 7%, 22%);
+    --colour-orage: hsl(19, 69%, 49%);
+    --colour-orange-lightened: hsl(19, 75%, 55%);
+    --colour-dark-grey: #1b1918;
+  }
+
+  .page {
+    background-color: var(--background-colour);
+    display: grid;
+    min-height: calc(100vh - 64px);
+    grid-template-rows: max-content max-content max-content auto;
+    gap: 12px;
+  }
+
   .header {
     display: grid;
     place-content: center;
+    text-align: center;
     padding: 12px 0px;
   }
 
+  .header__title {
+    font-size: 2rem;
+  }
+
+  .header__explanation {
+    font-size: 1.2rem;
+  }
+
   .picture {
     display: grid;
     place-content: center;
@@ -77,27 +161,78 @@
 
   .options {
     width: 100%;
-    display: flex;
-    justify-content: center;
+    padding: 12px;
+    display: grid;
+    place-items: center;
+    grid-template-columns: 100%;
   }
 
   .options__buttons-container {
     display: grid;
-    grid-template-columns: 50% 50%;
     gap: 12px;
+    grid-template-columns: 50% 50%;
+    place-content: center;
+    max-width: 500px;
   }
 
   .options__button {
-    background-color: #fff;
     border: 1px solid #000;
+    text-align: center;
     border-radius: 4px;
     padding: 12px;
     font-size: 1.2rem;
     cursor: pointer;
+    transition: all 0.2s ease-in-out;
   }
 
-  .options__button:hover {
-    background-color: #000;
-    color: #fff;
+  .options__button:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+  }
+
+  .option--sunrise {
+    border-color: var(--colour-orage);
+    background-color: var(--colour-orage);
+    color: var(--colour-light-grey);
+  }
+
+  .option--sunrise:hover:not(:disabled) {
+    color: white;
+    background-color: var(--colour-orange-lightened);
+  }
+
+  .option--sunset {
+    border-color: var(--colour-grey-lightened);
+    background-color: var(--colour-grey-lightened);
+    color: white;
+  }
+
+  .option--sunset:hover:not(:disabled) {
+    color: white;
+    background-color: var(--colour-grey);
+    border-color: var(--colour-dark-grey);
+  }
+
+  .score {
+    display: grid;
+    place-content: center;
+    text-align: center;
+    padding: 12px 0px;
+  }
+
+  .score__card {
+    display: grid;
+    place-content: center;
+    background: white;
+    text-align: center;
+    padding: 12px;
+    border-radius: 4px;
+    // gentle grey border, with soft shadow
+    border: 1px solid rgba(0, 0, 0, 0.1);
+    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.1);
+  }
+
+  .score__title {
+    font-size: 1.2rem;
   }
 </style>
diff --git a/src/routes/sunrise-sunset/ISunriseSunsetGuessingHistory.ts b/src/routes/sunrise-sunset/ISunriseSunsetGuessingHistory.ts
new file mode 100644
index 0000000..9cdf2eb
--- /dev/null
+++ b/src/routes/sunrise-sunset/ISunriseSunsetGuessingHistory.ts
@@ -0,0 +1,9 @@
+type SunriseSunsetOption = 'sunrise' | 'sunset';
+
+export interface ISunriseSunsetGuessingHistory {
+    mostRecentGuessDate: undefined | string; // e.g. "2023-01-26"
+    totalNumberOfGuesses: number;
+    guesses: SunriseSunsetOption[];
+    incorrectDays: string[]; // e.g. ["2023-01-26", "2023-01-27"]
+    correctDays: string[]; // e.g. ["2023-01-28", "2023-01-29"]
+}