@media (max-width: 641px) {
    /* -------- TAB SECTION -------- */
    .tabs button {
        margin-top: 15px;
    }

    .tabs button + button {
        margin-left: 0;
    }

    .tabs .tabs__list img {
        margin-top: 25px;
    }

    .tabs .tabs__list h4 {
        font-size: 24px;
    }

    /* -------- WHAT-WE-DO -------- */
    .what-we-do .cards__box h4 {
        margin-top: -19px;
        font-size: 18px;
    }

    .what-we-do .cards, 
    .services .cards {
        margin-top: 35px;
    }
}

@media (max-width: 620px) {
    /* -------- TAB SECTION -------- */
    .tabs {
        padding-bottom: 40px;
    }

    /* -------- FOOTER -------- */
    .footer__links li + li, 
    .footer__social a + a {
        margin-top: 10px;
    }

    .footer__info {
        padding-bottom: 25px;
    }

    .footer__info h3 {
        margin: 20px 0 15px 0;
    }

    .footer__copy {
        padding: 20px 0 25px 0;
    }
}

@media (max-width: 555px) {
    /* -------- TITLE -------- */
    .subtitle {
        font-size: 14px;
    }

    .title {
        font-size: 24px;
        padding-top: 40px;
    }

    /* -------- THIS IS VELOCITY -------- */
    .this-velocity h1 {
        font-size: 40px;
        padding-top: 100px;
    }

    .this-velocity {
        display: flex;
        flex-wrap: nowrap;
    }

    .this-velocity div a {
        margin-top: 60px;
        margin-bottom: 30px;
    }

    .this-velocity div a + a {
        margin: 0 0 150px 0;
    } 

    .this-velocity__box {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    /* -------- SERVICES -------- */
    .services .cards__box h4 {
        font-size: 18px;
    }
}

@media (max-width: 400px) {
    /* -------- HEADER -------- */
    .header_nav li + li {
        padding-left: 10px;
    }

    .header a {
        font-size: 22px;
        letter-spacing: 2px;
    }

    .header_nav {
        padding: 15px 0 15px 0;
    }

    .header_nav a {
        font-size: 14px;
    }

    /* -------- FOOTER -------- */
    .footer__copy a {
        font-size: 13px;
    }
}