add teaser page (#9210)

* add teaser page

* add origin

* host card externally

* fix

* remove unused styles

* redesign

* black bg

* fix og image

* tweak font-sizes and alignment

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>

sites/svelte.dev/src/routes/+layout.svelte

@@ -10,7 +10,7 @@
 </script>
 
 <svelte:head>
-	{#if $page.route.id !== '/blog/[slug]'}
+	{#if !$page.route.id.startsWith('/blog/')}
 		<meta name="twitter:card" content="summary" />
 		<meta name="twitter:image" content="https://svelte.dev/images/twitter-thumbnail.jpg" />
 		<meta name="og:image" content="https://svelte.dev/images/twitter-thumbnail.jpg" />

sites/svelte.dev/src/routes/blog/runes/+page.svelte

@@ -0,0 +1,99 @@
+<svelte:head>
+	<title>Something magical is coming</title>
+
+	<meta name="twitter:card" content="summary_large_image" />
+	<meta name="twitter:title" content="Something magical is coming" />
+	<meta
+		name="twitter:description"
+		content="We've got something to show you. We think you're going to like it."
+	/>
+	<meta
+		name="Description"
+		content="We've got something to show you. We think you're going to like it."
+	/>
+
+	<meta
+		name="twitter:image"
+		content="https://sveltejs.github.io/assets/artwork/svelte-5-teaser.jpg"
+	/>
+	<meta name="og:image" content="https://sveltejs.github.io/assets/artwork/svelte-5-teaser.jpg" />
+</svelte:head>
+
+<div class="teaser">
+	<div class="copy">
+		<div class="copy-inner">
+			<h1>Something magical is coming</h1>
+			<p>We've got something to show you. We think you're going to like it.</p>
+			<p>
+				Join us here on <strong>Wednesday September 20</strong> for a glimpse at the future of Svelte.
+			</p>
+		</div>
+	</div>
+</div>
+
+<style>
+	.teaser {
+		display: flex;
+		flex-direction: column;
+		justify-content: end;
+		position: absolute;
+		left: 0;
+		top: 0;
+		width: 100%;
+		height: 100%;
+		background-color: black;
+		background-image: url(https://sveltejs.github.io/assets/artwork/svelte-5-teaser-background.jpg);
+		background-size: cover;
+		background-position: center;
+	}
+
+	.copy {
+		padding: var(--sk-page-padding-top) var(--sk-page-padding-side) 6rem var(--sk-page-padding-side);
+		width: 100%;
+		margin: 0 auto;
+		color: white;
+		background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
+		padding-bottom: 8rem;
+	}
+
+	.copy-inner {
+		max-width: 70rem;
+		margin: 0 auto;
+	}
+
+	h1,
+	p {
+		color: white;
+	}
+
+	h1 {
+		margin: 0 0 0em 0;
+		line-height: 1.2;
+		max-width: 9em;
+		font-size: 4rem;
+	}
+
+	p {
+		margin: 0.5em 0;
+		text-wrap: balance;
+	}
+
+	strong {
+		white-space: nowrap;
+	}
+
+	@media (min-width: 600px) {
+		h1 {
+			max-width: none;
+		}
+	}
+
+	@media (min-width: 800px) {
+		h1 {
+			font-size: 5.4rem;
+		}
+		p {
+			font-size: 2rem;
+		}
+	}
+</style>