Add sponsors

sass/_sponsors.scss

@@ -0,0 +1,19 @@
+.sponsors {
+	display: flex;
+	gap: 5em;
+	justify-content: center;
+	flex-wrap: wrap;
+
+	a {
+		display: block;
+		width: 100%;
+		max-width: 10em;
+	}
+}
+
+
+@media (prefers-color-scheme: dark) {
+	.sponsors img[src$=".svg"] {
+		filter: invert(100%);
+	}
+}

sass/style.scss

@@ -3,6 +3,7 @@
 @import "grid";
 @import "personnel";
 @import "gallery";
+@import "sponsors";
 
 * {
 	box-sizing: border-box;
@@ -13,6 +14,10 @@ html, body, h1, h2, h3, p, ul, li {
 	padding: 0;
 }
 
+h2 {
+	margin-bottom: 2em;
+}
+
 body {
 	font-family: "Noto Sans", Tahoma, Geneva, Verdana, sans-serif;
 	line-height: 1.6;