.button {
    display: inline-block;
    font-family: var(--font-main);
    font-size: 14px;
    line-height: 14px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    vertical-align: middle;
    white-space: nowrap;
    margin-bottom: 5px;
    border: 0;
    border-radius: 0;
    letter-spacing: 0.02em;
    padding: 10px;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
}

.button-primary {
    color: var(--color-white);
    background: var(--color-red);
    -webkit-box-shadow: 5px 5px 0px var(--color-graylight);
    box-shadow: 5px 5px 0px var(--color-graylight);
}

.button-primary:hover,
.button-primary:active {
    background: var(--color-neptune);
    color: var(--color-yellow);
    -webkit-box-shadow: 5px 5px 0px var(--color-egyptianblue);
    box-shadow: 5px 5px 0px var(--color-egyptianblue);
}

.button-yellow {
    background: var(--color-yellow);
    -webkit-box-shadow: 5px 5px 0px var(--color-graylight);
    box-shadow: 5px 5px 0px var(--color-graylight);
    color: var(--color-black);
}

.button-yellow:hover,
.button-yellow:active {
    background: var(--color-neptune);
    -webkit-box-shadow: 5px 5px 0px var(--color-egyptianblue);
    box-shadow: 5px 5px 0px var(--color-egyptianblue);
    color: var(--color-white);
}

.button-black {
    background: #0C0C0C;
    border: 3px solid var(--color-white);
    -webkit-box-shadow: 5px 5px 0px var(--color-graylight);
    box-shadow: 5px 5px 0px var(--color-graylight);
    color: var(--color-white);
    padding: 7px 10px;
}

.button-black:hover,
.button-black:active {
    background: var(--color-white);
    -webkit-box-shadow: 5px 5px 0px #575757;
    box-shadow: 5px 5px 0px #575757;
    color: var(--color-black);
}

@media (min-width: 768px) {
    .button-yellow {
        font-size: 24px;
        line-height: 24px;
        padding: 20px;
    }

    .button-black {
        font-size: 24px;
        line-height: 24px;
        padding: 17px;
    }
}

@media (min-width: 1024px) {
    .button {
        margin-bottom: 10px;
    }

    .button-primary {
        margin-bottom: 5px;
    }

    .button-yellow {
        font-size: 32px;
        line-height: 32px;
        padding: 20px;
        -webkit-box-shadow: 10px 10px 0px var(--color-graylight);
        box-shadow: 10px 10px 0px var(--color-graylight);
    }

    .button-yellow:hover,
    .button-yellow:active {
        -webkit-box-shadow: 10px 10px 0px var(--color-egyptianblue);
        box-shadow: 10px 10px 0px var(--color-egyptianblue);
    }

    .button-black {
        font-size: 32px;
        line-height: 32px;
        padding: 17px;
        -webkit-box-shadow: 10px 10px 0px var(--color-graylight);
        box-shadow: 10px 10px 0px var(--color-graylight);
    }

    .button-black:hover,
    .button-black:active {
        -webkit-box-shadow: 10px 10px 0px #575757;
        box-shadow: 10px 10px 0px #575757;
    }
}

@media (min-width: 1234px) {
    .button-primary {
        font-size: 24px;
        line-height: 24px;
        -webkit-box-shadow: 10px 10px 0px var(--color-graylight);
        box-shadow: 10px 10px 0px var(--color-graylight);
        margin-bottom: 10px;
        padding: 20px;
    }

    .button-primary:hover,
    .button-primary:active {
        -webkit-box-shadow: 10px 10px 0px var(--color-egyptianblue);
        box-shadow: 10px 10px 0px var(--color-egyptianblue);
    }
}