@media screen and (max-width: 1400px) {
  .letter {
    margin-left: -110px;
  }
}

@media screen and (max-width: 1200px) {
  .letter {
    margin-left: -90px;
  }
}

@media screen and (max-width: 992px) {
  .banner-section .banner-content h1, .banner-section .banner-content h2 {
    font-size: 80px;
  }

  .think-section .first-row {
    max-width: none;
  }

  .project-content .project-image, .banner .project-image {
    width: 150px;
    height: 150px;
    line-height: 150px;
  }

  .project-content .project-image img, .banner .project-image img {
    width: 70px;
    height: 70px;
  }

  .project-content a {
    font-size: 20px;
  }

  .letter {
    margin-left: 0;
    height: 60px;
  }

}

@media screen and (max-width: 769px) {
  .header {
    background-color: rgba(0, 0, 0, 0.9);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }

  .header.menu-open {
    background-color: rgba(0, 0, 0, 1);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }

  .header.menu-open .navbar-collapse {
    height: 100vh;
    overflow-y: auto;
    padding: 20px 0;
  }

  .header.menu-open .nav-link {
    font-size: 22px;
    font-weight: 500;
    margin-bottom: 15px;
  }

  .banner-section .banner-content h1, .banner-section .banner-content h2, .project-detail h3 {
    font-size: 35px;
  }

  .banner-section .banner-content h4 {
    font-size: 20px;
  }

  .services-section .service-content h4, .project-detail p {
    font-size: 20px;
  }

  .services-section .service-content p {
    font-size: 14px;
  }

  .think-section .col:nth-of-type(even) .think-content {
    margin-top: 0;
  }

  .banner h1 {
    font-size: 42px;
    font-weight: 600;
  }
  .approach p,
  .approach ul {
    font-size: 16px;
  }
  .approach h2,
  .development-loop h2 {
    font-size: 30px;
  }

  footer .footer-logo {
    max-width: 200px;
  }

  footer .tagline,
  footer .page-links a,
  footer .page-links li a,
  footer p.serving,
  footer .copyright,
  .careers .card span {
    font-size: 14px;
  }

  footer .social li a {
    padding: 12px;
    font-size: 16px;
  }

  .careers .card h2 {
    font-size: 24px;
  }

  .btn-theme, .btn-theme-inverse {
    font-size: 14px;
    padding: 10px 20px;
  }
}

@media screen and (max-width: 576px) {
  footer .footer-logo {
    max-width: 160px;
  }

  footer .page-links li {
    display: block;
    border-right: none;
  }

  footer .page-links li a {
    padding: 0;
  }

  .banner {
    padding: 60px 0;
  }

  .banner h1, .project-detail h3 {
    font-size: 26px;
  }

  .project-detail p {
    font-size: 18px;
  }
}