.i-arrow-left::before {
    content: url(../icons/arrow-left.svg);
}

.i-dollar::before {
    content: url(../icons/dollar.svg);
}

.i-pig::before {
    content: url(../icons/piggy-bank.svg);
}

.light .i-pig::before {
    content: url(../icons/piggy-bank-light-mode.svg);
}