fix: astro custom.css format build error

Author: Gaic4o

src/styles/custom.css

@@ -1,49 +1,49 @@
 :root {
-	/* Layout */
-	--sl-content-width: 55rem; /* default: 45rem */
-	
-	/* Default Font (English, Russian, etc.) */
-	--sl-font: 'Roboto', system-ui, -apple-system, sans-serif;
+    /* Layout */
+    --sl-content-width: 55rem; /* default: 45rem */
+
+    /* Default Font (English, Russian, etc.) */
+    --sl-font: "Roboto", system-ui, -apple-system, sans-serif;
 }
 
 /* CJK Languages (Korean, Japanese, Chinese) */
 :root:lang(ko),
 :root:lang(ja),
 :root:lang(zh) {
-	--sl-font: 'Noto Sans', 'Roboto', system-ui, -apple-system, sans-serif;
+    --sl-font: "Noto Sans", "Roboto", system-ui, -apple-system, sans-serif;
 }
 
 :root,
-:root[data-theme='dark'] {
-	--sl-color-accent-low: #001026;
-	--sl-color-accent: #3193ff;
-	--sl-color-accent-high: #b8dcff;
-	--sl-color-white: #ffffff;
-	--sl-color-gray-1: #f8fafc;
-	--sl-color-gray-2: #e2e8f0;
-	--sl-color-gray-3: #94a3b8;
-	--sl-color-gray-4: #475569;
-	--sl-color-gray-5: #1e293b;
-	--sl-color-gray-6: #0f172a;
-	--sl-color-black: #020617;
+:root[data-theme="dark"] {
+    --sl-color-accent-low: #001026;
+    --sl-color-accent: #3193ff;
+    --sl-color-accent-high: #b8dcff;
+    --sl-color-white: #ffffff;
+    --sl-color-gray-1: #f8fafc;
+    --sl-color-gray-2: #e2e8f0;
+    --sl-color-gray-3: #94a3b8;
+    --sl-color-gray-4: #475569;
+    --sl-color-gray-5: #1e293b;
+    --sl-color-gray-6: #0f172a;
+    --sl-color-black: #020617;
 }
 
-:root[data-theme='light'] {
-	--sl-color-accent-low: #dbeafe;
-	--sl-color-accent: #3193ff;
-	--sl-color-accent-high: #004080;
-	--sl-color-white: #0f172a;
-	--sl-color-gray-1: #334155;
-	--sl-color-gray-2: #475569;
-	--sl-color-gray-3: #64748b;
-	--sl-color-gray-4: #94a3b8;
-	--sl-color-gray-5: #cbd5e1;
-	--sl-color-gray-6: #e2e8f0;
-	--sl-color-gray-7: #f1f5f9;
-	--sl-color-black: #ffffff;
+:root[data-theme="light"] {
+    --sl-color-accent-low: #dbeafe;
+    --sl-color-accent: #3193ff;
+    --sl-color-accent-high: #004080;
+    --sl-color-white: #0f172a;
+    --sl-color-gray-1: #334155;
+    --sl-color-gray-2: #475569;
+    --sl-color-gray-3: #64748b;
+    --sl-color-gray-4: #94a3b8;
+    --sl-color-gray-5: #cbd5e1;
+    --sl-color-gray-6: #e2e8f0;
+    --sl-color-gray-7: #f1f5f9;
+    --sl-color-black: #ffffff;
 }
 
 :root[data-theme="dark"] [data-theme-only="light"],
 :root[data-theme="light"] [data-theme-only="dark"] {
-	display: none;
+    display: none;
 }