Styling for login pages

frontend/src/main.less

@@ -54,6 +54,11 @@ body, @{inputs}, @{buttons} {
 	&.error {
 		border-color: red;
 	}
+
+	&:focus-visible {
+		outline: none;
+		border-color: var(--accent2);
+	}
 }
 
 .input-error {
@@ -340,3 +345,20 @@ main {
 		opacity: 1;
 	}
 }
+
+.login-providers {
+	max-width: 50rem;
+	margin: 1rem auto;
+
+	display: flex;
+	flex-direction: column;
+	align-items: stretch;
+
+	.provider + .provider {
+		margin-top: 0.5rem;
+	}
+
+	button {
+		width: 100%;
+	}
+}