@media (max-width: 1200px) {
  html {
    font-size: 62.5%;
  }
}

@media (max-width: 991px) {
  .nav {
    padding: 0 2.4rem;
  }
  /* initial state */
  .nav__links {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
    position: absolute;
    top: 0;
    left: 0;
    height: 100vh;
    width: 100%;

    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4.6rem;
    transition: all 0.5s ease-in;
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
  }
  .btn-mobile-nav {
    display: block;
  }
  .nav--open .nav__links {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
  }
  .nav__link:link,
  .nav__link:visited {
    font-size: 2rem;
  }

  /*****************/
  /*    Header     */
  /*****************/
  .header {
    height: auto;
    padding: 0 0 9.6rem 0;
  }
  .header__title {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0 3.2rem;
    margin-top: 9.6rem;
    gap: 6.4rem;
  }
  .header__text-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4rem;
  }
  .header__text-container h1 {
    font-size: 4rem;
  }
  .header__text-container h4 {
    font-size: 2.1rem;
  }
  .header__img-container {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .header__img-container img {
    max-width: 60%;
    transform: translate(0, 0);
    -webkit-transform: translate(0, 0);
    -moz-transform: translate(0, 0);
    -ms-transform: translate(0, 0);
    -o-transform: translate(0, 0);
  }

  /*******************/
  .section__header {
    font-size: 3.2rem;
  }
  .features {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    margin: 0;
  }

  .features :nth-child(3) {
    order: 4;
  }
  .features :nth-child(4) {
    order: 3;
  }
  .features__feature {
    width: 80%;
    margin-bottom: 4.8rem;
  }
  /******************************************/
  .operations__header {
    font-size: 1.6rem;
    margin-top: 2.4rem;
  }
  .operations__content {
    padding: 2rem 3rem 3rem;
  }
  .operations__content--active {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 2rem;
  }
  .btn {
    font-size: 1.4rem;
    padding: 2rem;
  }
  /*****************/
  .slider {
    height: 80rem;
  }
  .slide {
    height: 80rem;
  }
  .testimonial {
    width: 80%;
  }
  .testimonial__header {
    font-size: 2rem;
  }
  .testimonial__text {
    font-size: 1.6rem;
  }
  .testimonial__name {
    font-size: 1.4rem;
  }
  .testimonial__location {
    font-size: 1.4rem;
  }
  .testimonial__photo {
    width: 6rem;
  }
  .slider__btn {
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: flex-end;
    background-color: transparent;
  }
  /**************/
  .footer__nav {
    flex-direction: column;
    align-items: center;
    gap: 2rem;
  }
  .section--sign-up .section__header {
    font-size: 2rem;
  }
  .section--sign-up .btn {
    padding: 1rem 2rem;
  }
  .footer__item {
    margin: 0;
  }
}
@media (max-width: 767px) {
  .header__img-container img {
    max-width: 100%;
  }
  .header__text-container h1 {
    font-size: 3rem;
  }
  .section__header {
    font-size: 2.4rem;
  }
}
@media (max-width: 600px) {
  .btn {
    font-size: 1.4rem;
    padding: 1rem 0.5rem;
    border-radius: 12px;
    -webkit-border-radius: 12px;
    -moz-border-radius: 12px;
    -ms-border-radius: 12px;
    -o-border-radius: 12px;
  }
  .operations__tab--active {
    transform: translateY(-80%);
    -webkit-transform: translateY(-80%);
    -moz-transform: translateY(-80%);
    -ms-transform: translateY(-80%);
    -o-transform: translateY(-80%);
  }

  .modal {
    width: 80%;
    padding: 5rem 2rem;
  }
  .modal__header {
    font-size: 2rem;
  }
  .modal__form {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
  }
  .modal__form input {
    font-size: initial;
  }
}

@media (max-height: 400px) {
  .modal {
    height: 450px;
  }
}