feat: added 404 not found page

Author: coderdiaz

src/content/pages/404.mdx

@@ -0,0 +1,9 @@
+---
+title: 404 - Page not found
+description: Sorry, the page you are looking for doesn't exist or has been moved.
+seo:
+  title: 404 - Page not found
+  description: Sorry, the page you are looking for doesn't exist or has been moved.
+  type: website
+  robots: noindex, no follow
+---

src/pages/404.astro

@@ -0,0 +1,80 @@
+---
+import { getEntry } from 'astro:content';
+import BaseLayout from '@/layouts/BaseLayout.astro';
+import Container from '@/components/Container.astro';
+
+const entry = await getEntry('pages', '404');
+---
+
+<BaseLayout seo={entry?.data.seo}>
+  <Container
+    as="section"
+    class="min-h-[calc(100vh-12rem)] flex items-center justify-center"
+  >
+    <div class="text-center space-y-8">
+      <!-- 404 Number -->
+      <div class="space-y-4">
+        <h1 class="text-6xl md:text-8xl font-bold text-headings opacity-20">
+          404
+        </h1>
+        <div class="space-y-2">
+          <h2 class="text-2xl md:text-3xl font-medium text-headings">
+            {entry?.data.title}
+          </h2>
+          <p class="text-muted-foreground max-w-md mx-auto">
+            {entry?.data.description}
+          </p>
+        </div>
+      </div>
+
+      <!-- Action Buttons -->
+      <div
+        class="flex flex-col sm:flex-row gap-4 justify-center items-center pt-4"
+      >
+        <a
+          href="/"
+          class="group inline-flex items-center justify-center px-6 py-3 bg-headings text-background font-medium rounded-full transition-all duration-200 hover:bg-headings/90 hover:scale-105 focus:outline-none focus:ring-2 focus:ring-headings/50 focus:ring-offset-2 focus:ring-offset-background min-w-[140px]"
+        >
+          <svg
+            class="w-4 h-4 mr-2 transition-transform group-hover:-translate-x-1"
+            fill="none"
+            stroke="currentColor"
+            viewBox="0 0 24 24"
+          >
+            <path
+              stroke-linecap="round"
+              stroke-linejoin="round"
+              stroke-width="2"
+              d="M10 19l-7-7m0 0l7-7m-7 7h18"></path>
+          </svg>
+          Go Home
+        </a>
+
+        <a
+          href="/writing"
+          class="group inline-flex items-center justify-center px-6 py-3 border border-border text-headings font-medium rounded-full transition-all duration-200 hover:bg-muted-foreground/10 hover:border-headings/30 focus:outline-none focus:ring-2 focus:ring-headings/50 focus:ring-offset-2 focus:ring-offset-background min-w-[140px]"
+        >
+          Browse Writing
+          <svg
+            class="w-4 h-4 ml-2 transition-transform group-hover:translate-x-1"
+            fill="none"
+            stroke="currentColor"
+            viewBox="0 0 24 24"
+          >
+            <path
+              stroke-linecap="round"
+              stroke-linejoin="round"
+              stroke-width="2"
+              d="M14 5l7 7m0 0l-7 7m7-7H3"></path>
+          </svg>
+        </a>
+      </div>
+
+      <!-- Additional Help Text -->
+      <p class="text-sm text-muted-foreground/70 pt-8">
+        If you believe this is an error, please check the URL or try refreshing
+        the page.
+      </p>
+    </div>
+  </Container>
+</BaseLayout>

src/pages/index.astro

@@ -9,6 +9,11 @@ import Talk from '@/components/ui/Talk.astro';
 import { sortJobsByDate } from '@/lib/utils';
 
 const entry = await getEntry('pages', 'homepage');
+
+if (!entry) {
+  throw new Error('Homepage entry not found');
+}
+
 const { Content } = await render(entry);
 
 const links = await getCollection('links');
@@ -18,11 +23,11 @@ const talks = await getCollection('talks');
 ---
 
 <BaseLayout seo={entry.data.seo}>
-  <Container as='section' class='py-6'>
+  <Container as="section" class="py-6">
     <Author {...DEFAULT_CONFIGURATION.author} />
   </Container>
 
-  <Container as='section' class='py-6'>
+  <Container as="section" class="py-6">
     <div class="flex flex-col gap-6">
       <div class="flex items-center">
         <span class="text-headings">About</span>
@@ -34,7 +39,7 @@ const talks = await getCollection('talks');
   </Container>
   {
     links.length > 0 && (
-      <Container as='section' class='py-8'>
+      <Container as="section" class="py-8">
         <div class="flex flex-col gap-5">
           <span class="text-headings">Contact</span>
           <ul class="flex flex-col gap-3">
@@ -62,7 +67,7 @@ const talks = await getCollection('talks');
   }
   {
     sortedJobs.length > 0 && (
-      <Container as='section' class='py-6'>
+      <Container as="section" class="py-6">
         <div class="flex flex-col gap-5">
           <span class="text-headings">Work Experience</span>
           <ul class="flex flex-col gap-8">
@@ -76,7 +81,7 @@ const talks = await getCollection('talks');
   }
   {
     talks.length > 0 && (
-      <Container as='section' class='py-6'>
+      <Container as="section" class="py-6">
         <div class="flex flex-col gap-5">
           <span class="text-headings">Speaking</span>
           <ul class="flex flex-col gap-8">