@media screen and (max-width: 1200px) {
  #profile {
    height: fit-content;
    margin-bottom: 6rem;
  }
  .about-containers {
    flex-wrap: wrap;
  }
  #contact,
  #projects,
  #research,
  #achievements,
  #leadership {
    height: fit-content;
  }
}

@media screen and (max-width: 1200px) {
  #desktop-nav {
    display: none;
  }
  #hamburger-nav {
    display: flex;
  }
  #education,
  #skills {
    margin-top: 2rem;
  }
  #profile,
  .section-container {
    display: block;
  }
  .arrow {
    display: none;
  }
  section,
  .section-container {
    height: fit-content;
  }
  section {
    margin: 0 5%;
  }
  footer {
    margin: 0 5%;
  }
  .section__pic-container {
    width: 275px;
    height: 275px;
    margin: 0 auto 2rem;
  }
  .about-containers {
    margin-top: 0;
  }
  .research-cards,
  .achievements-list,
  .leadership-list,
  .about-containers.projects-list {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 600px) {
  #contact,
  footer {
    height: fit-content;
  }
  #profile {
    height: fit-content;
    margin-bottom: 0;
    padding-top: 4vh;
  }
  article {
    font-size: 0.9rem;
  }
  footer nav {
    height: fit-content;
    margin-bottom: 2rem;
  }
  .about-containers,
  .contact-info-upper-container,
  .btn-container {
    flex-wrap: wrap;
  }
  .contact-info-container {
    margin: 0;
    flex: 1;
    min-width: 150px;
  }
  .contact-info-container p,
  .nav-links li a {
    font-size: 0.9rem;
  }
  .experience-sub-title {
    font-size: 1.1rem;
  }
  .logo {
    font-size: 1.3rem;
  }
  .nav-links {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
    font-size: 0.9rem;
  }
  .section__pic-container {
    width: auto;
    height: 46vw;
    justify-content: center;
  }
  .section__text__p2 {
    font-size: 1.3rem;
  }
  .title {
    font-size: 1.8rem;
  }
  .text-container {
    text-align: justify;
  }
  .hero-intro {
    font-size: 0.9rem;
  }
  .section__text__p1 {
    font-size: 0.9rem;
  }
  section {
    margin: 0 3%;
    padding-left: 0;
    padding-right: 0;
  }
  footer {
    margin: 0 3%;
  }
  .btn-container {
    flex-direction: column;
    width: 100%;
  }
  .btn {
    width: 100%;
    font-size: 0.9rem;
  }
  .skill-card {
    min-width: 100%;
  }
  .about-containers.projects-list {
    grid-template-columns: 1fr;
  }
  .research-cards,
  .achievements-list,
  .leadership-list {
    grid-template-columns: 1fr;
  }
}

/* Timeline responsive fixes */
.history-tl-container ul.timeline-ul li {
  margin-left: 0;
  padding-left: 40px;
}

@media screen and (max-width: 600px) {
  .history-tl-container ul.timeline-ul li {
    margin-left: 0;
    padding-left: 30px;
    width: 95%;
  }

  .timestamp,
  .time {
    font-size: 0.85rem;
  }
  
  .history-tl-container ul.timeline-ul li::before {
    border: 2px solid rgba(255, 255, 255, 0.74);
    height: 14px;
    width: 14px;
    top: 2px;
    left: -10px;
  }
  
  .timestamp h3 {
    font-size: 1rem;
  }
  
  .timestamp h4 {
    font-size: 0.85rem;
  }
}

/* Project cards responsive */
@media screen and (max-width: 768px) {
  .about-containers.projects-list {
    grid-template-columns: 1fr;
  }
}

/* Skills section responsive */
@media screen and (max-width: 768px) {
  .about-containers.skill-card {
    grid-template-columns: 1fr;
  }
}