error: @-rule 'page' not supported
 --> $DIR/unsupported_rule-fail.rs:4:10
  |
4 |         @page {
  |          ^^^^

error: @-rule 'property' not supported
 --> $DIR/unsupported_rule-fail.rs:7:10
  |
7 |         @property property-name {
  |          ^^^^^^^^

error: @-rule 'completely-unknown' not supported
  --> $DIR/unsupported_rule-fail.rs:12:10
   |
12 |         @completely-unknown {
   |          ^^^^^^^^^^^^^^^^^^