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.plchfcs {
    opacity: 1;
    transition: opacity .15s ease-out;
}
input {
    &::-webkit-input-placeholder {
        .plchfcs;
    }
    &::-moz-placeholder {
        .plchfcs;
    }
    &:-moz-placeholder {
        .plchfcs;
    }
    &:-ms-input-placeholder {
        .plchfcs;
    }
    &:focus {
        &::-webkit-input-placeholder {
            opacity: 0;
        }
        &::-moz-placeholder {
            opacity: 0;
        }
        &:-moz-placeholder {
            opacity: 0;
        }
        &:-ms-input-placeholder {
            opacity: 0;
        }
    }
}