swc/crates/swc_css_prefixer/tests/fixture/nested/input.css

@keyframes test {
    0% {
        color: red;
    }
}

@supports (flex-wrap: wrap) {
    @keyframes test {
        0% {
            color: red;
        }
    }
}

@supports (flex-wrap: wrap) {
    @supports (flex-wrap: wrap) {
        @keyframes test {
            0% {
                color: red;
            }
        }
    }
}

.test {
    &.class::placeholder {
        color: red;
    }
}

.test {
    &.class::placeholder {
         appearance: auto;
    }
}

.test {
    appearance: auto;

    &.class {
        color: red;
    }
}

.test {
    appearance: auto;

    &.class {
         appearance: auto;
    }
}

.test {
    @supports (foo: bar) {
        appearance: auto;
    }
}

.test {
    @media (orientation: landscape) {
        appearance: auto;
    }
}

.test {
    appearance: auto;

    &.class::placeholder {
        appearance: auto;
    }
    @media (orientation: landscape) {
        appearance: auto;
    }
}

@media (orientation: landscape) {
    .test {
        &.class::placeholder {
             appearance: auto;
        }
    }
}

@media (orientation: landscape) {
    .test {
        appearance: auto;

        &.class {
            appearance: auto;
        }
    }
}

.test {
    appearance: none;

    &.class {
        appearance: auto;

        &.class {
            appearance: menulist-button;

            &.class {
                appearance: button;
            }
        }
    }
}