refactor(colours): tokenise card shadows and scrims

Introduce --shadow-card, --shadow-card-emphasized, --shadow-cta,
--scrim, --scrim-soft, and --scrim-banner. Migrate 14 inline
literals (card.css, input.css, Notification, MediaRoulette, the
two Landing CTA buttons, the popup overlay, the palette and
roulette scrims, three identity banners, the user profile cover
art shadow) onto the tokens, with light/dark adaptation handled
by the existing prefers-color-scheme blocks instead of duplicated
inline. Two single-use Landing demo-focus values stay inline.

12 files changed, 26 insertions, 32 deletions

diff --git a/src/lib/CommandPalette/CommandPalette.svelte b/src/lib/CommandPalette/CommandPalette.svelte
index ca3513f4..faa739a4 100644
--- a/src/lib/CommandPalette/CommandPalette.svelte
+++ b/src/lib/CommandPalette/CommandPalette.svelte
@@ -268,7 +268,7 @@ const handleGlobalKey = (e: KeyboardEvent) => {
     left: 0;
     width: 100%;
     height: 100%;
-    background-color: rgba(0, 0, 0, 0.6);
+    background-color: var(--scrim);
     z-index: 100;
     backdrop-filter: blur(3px);
     cursor: pointer;
diff --git a/src/lib/Events/Event.svelte b/src/lib/Events/Event.svelte
index a1d6cf42..d93bc9d0 100644
--- a/src/lib/Events/Event.svelte
+++ b/src/lib/Events/Event.svelte
@@ -43,7 +43,7 @@ let { event, avatar = false }: { event: Event; avatar?: boolean } = $props();
     display: flex;
     flex-wrap: wrap;
     column-gap: 1.5em;
-    background-color: rgba(0, 0, 0, 0.468);
+    background-color: var(--scrim-banner);
     color: #d8d8d8;
     border-top-left-radius: 0;
     border-top-right-radius: 0;
diff --git a/src/lib/Events/Group.svelte b/src/lib/Events/Group.svelte
index 9b0ddba5..28aef6c1 100644
--- a/src/lib/Events/Group.svelte
+++ b/src/lib/Events/Group.svelte
@@ -56,7 +56,7 @@ let { group }: { group: Group } = $props();
     display: flex;
     flex-wrap: wrap;
     column-gap: 1.5em;
-    background-color: rgba(0, 0, 0, 0.468);
+    background-color: var(--scrim-banner);
     color: #d8d8d8;
     border-top-left-radius: 0;
     border-top-right-radius: 0;
diff --git a/src/lib/Landing.svelte b/src/lib/Landing.svelte
index 319e8a48..bca1554c 100644
--- a/src/lib/Landing.svelte
+++ b/src/lib/Landing.svelte
@@ -450,7 +450,7 @@ $effect(() => {
   .cta:hover {
     text-decoration: none;
     transform: translateY(-2px);
-    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
+    box-shadow: var(--shadow-cta);
   }
 
   .demo-overlay {
diff --git a/src/lib/LandingHero.svelte b/src/lib/LandingHero.svelte
index c1d8a5aa..f080f156 100644
--- a/src/lib/LandingHero.svelte
+++ b/src/lib/LandingHero.svelte
@@ -125,7 +125,7 @@ const scrollPastHero = () => {
   .cta:hover {
     text-decoration: none;
     transform: translateY(-2px);
-    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
+    box-shadow: var(--shadow-cta);
   }
 
   .cta:active {
diff --git a/src/lib/List/MediaRoulette.svelte b/src/lib/List/MediaRoulette.svelte
index d6e33d7a..3fbc89d6 100644
--- a/src/lib/List/MediaRoulette.svelte
+++ b/src/lib/List/MediaRoulette.svelte
@@ -163,7 +163,7 @@ const handleOverlayClick = (e: MouseEvent) => {
     left: 0;
     right: 0;
     bottom: 0;
-    background: rgba(0, 0, 0, 0.6);
+    background: var(--scrim);
     display: flex;
     align-items: center;
     justify-content: center;
@@ -320,7 +320,7 @@ const handleOverlayClick = (e: MouseEvent) => {
     margin: 0 auto 1rem;
     border-radius: 8px;
     overflow: hidden;
-    box-shadow: rgba(0, 0, 11, 0.1) 0px 7px 29px 0px;
+    box-shadow: var(--shadow-card);
   }
 
   .cover-wrapper :global(.roulette-cover) {
diff --git a/src/lib/Notification/Notification.svelte b/src/lib/Notification/Notification.svelte
index a3271d58..1543f3b9 100644
--- a/src/lib/Notification/Notification.svelte
+++ b/src/lib/Notification/Notification.svelte
@@ -65,7 +65,7 @@ const remove = () => {
   #notification {
     background-color: var(--base001);
     box-shadow:
-      rgba(0, 0, 11, 0.2) 0px 7px 29px 0px,
+      var(--shadow-card-emphasized),
       0 0 0 4px var(--base0E);
 
     widows: 100%;
diff --git a/src/routes/user/[user]/+page.svelte b/src/routes/user/[user]/+page.svelte
index fd1e2d7e..1bcedc52 100644
--- a/src/routes/user/[user]/+page.svelte
+++ b/src/routes/user/[user]/+page.svelte
@@ -489,7 +489,7 @@ const toggleCategory = () => {
     display: flex;
     flex-wrap: wrap;
     column-gap: 1.5em;
-    background-color: rgba(0, 0, 0, 0.468);
+    background-color: var(--scrim-banner);
     color: #d8d8d8;
     border-top-left-radius: 0;
     border-top-right-radius: 0;
@@ -529,7 +529,7 @@ const toggleCategory = () => {
     height: $size;
     object-fit: cover;
     transition: $transition;
-    box-shadow: rgba(0, 0, 11, 0.1) 0px 7px 29px 0px;
+    box-shadow: var(--shadow-card);
     overflow: hidden;
 
     &:hover {
diff --git a/src/styles/card.css b/src/styles/card.css
index 07a62fcd..9af777c5 100644
--- a/src/styles/card.css
+++ b/src/styles/card.css
@@ -2,30 +2,15 @@
 
 details,
 .card {
-	box-shadow: rgba(0, 0, 11, 0.1) 0px 7px 29px 0px;
-}
-
-@media (prefers-color-scheme: light) {
-	details,
-	.card {
-		box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
-	}
+	box-shadow: var(--shadow-card);
 }
 
 .header {
 	box-shadow:
-		rgba(0, 0, 11, 0.2) 0px 7px 29px 0px,
+		var(--shadow-card-emphasized),
 		0 0 0 5px var(--base02);
 }
 
-@media (prefers-color-scheme: light) {
-	.header {
-		box-shadow:
-			rgba(100, 100, 111, 0.2) 0px 7px 29px 0px,
-			0 0 0 5px var(--base02);
-	}
-}
-
 .card {
 	background-color: var(--base0011);
 	padding: 1rem;
diff --git a/src/styles/colours.css b/src/styles/colours.css
index 0442fee4..84669a0d 100644
--- a/src/styles/colours.css
+++ b/src/styles/colours.css
@@ -17,6 +17,14 @@
 	--base0D: #7cafc2;
 	--base0E: #ba8baf;
 	--base0F: #a16946;
+
+	--shadow-card: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
+	--shadow-card-emphasized: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
+	--shadow-cta: 0 4px 20px rgba(0, 0, 0, 0.15);
+
+	--scrim: rgba(0, 0, 0, 0.6);
+	--scrim-soft: rgba(0, 0, 0, 0.5);
+	--scrim-banner: rgba(0, 0, 0, 0.468);
 }
 
 @media (prefers-color-scheme: dark) {
@@ -39,6 +47,9 @@
 		--base0D: #7baeb1;
 		--base0E: #b98aae;
 		--base0F: #a06845;
+
+		--shadow-card: rgba(0, 0, 11, 0.1) 0px 7px 29px 0px;
+		--shadow-card-emphasized: rgba(0, 0, 11, 0.2) 0px 7px 29px 0px;
 	}
 }
 
diff --git a/src/styles/input.css b/src/styles/input.css
index 41b8af06..a46c9b13 100644
--- a/src/styles/input.css
+++ b/src/styles/input.css
@@ -14,8 +14,7 @@ textarea {
 	transition:
 		background-color 0.15s ease-in-out,
 		transform 0.15s ease-in-out;
-	/* box-shadow: 0 4px 30px var(--base01); */
-	box-shadow: rgba(0, 0, 11, 0.1) 0px 7px 29px 0px;
+	box-shadow: var(--shadow-card);
 }
 
 input,
@@ -110,8 +109,7 @@ button {
 	transition:
 		background-color 0.15s ease-in-out,
 		transform 0.15s ease-in-out;
-	/* box-shadow: 0 4px 30px var(--base01); */
-	box-shadow: rgba(0, 0, 11, 0.1) 0px 7px 29px 0px;
+	box-shadow: var(--shadow-card);
 }
 
 button:hover {
diff --git a/src/styles/popup.scss b/src/styles/popup.scss
index 97b2e3d1..463a17d8 100644
--- a/src/styles/popup.scss
+++ b/src/styles/popup.scss
@@ -13,7 +13,7 @@
 .popup-fullscreen {
   width: 100%;
   height: 100%;
-  background-color: rgba(0, 0, 0, 0.5);
+  background-color: var(--scrim-soft);
   z-index: 3;
   backdrop-filter: blur(8px);
 }