/* ===== RESPONSIVE DESIGN ===== */

/* Extra Large Screens */
@media screen and (max-width: 1400px) {
  #home {
    gap: 3rem;
  }
  
  .about-containers {
    flex-wrap: wrap;
  }
  
  .title {
    font-size: 2.5rem;
  }
}

/* Large Tablets and Small Laptops */
@media screen and (max-width: 1200px) {
  /* Hide desktop nav, show hamburger */
  #desktop-nav {
    display: none;
  }
  
  #hamburger-nav {
    display: flex;
    justify-content: space-between;
    padding: 1rem 5%;
    align-items: center;
  }
  
  /* Sections */
  section {
    padding: 3rem 5%;
    margin: 0;
  }
  
  #home {
    flex-direction: column;
    text-align: center;
    padding-top: 6rem;
    gap: 2rem;
  }
  
  /* Profile picture is now responsive via clamp() in main CSS */
  
  .section__text h1 {
    font-size: 2.5rem;
  }
  
  .section-container {
    flex-direction: column;
    gap: 2rem;
  }
  
  .arrow {
    display: none;
  }
  
  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr));
  }
  
  .projects-container {
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  }
}

/* Tablets */
@media screen and (max-width: 900px) {
  .title {
    font-size: 2rem;
  }
  
  /* Profile picture is now responsive via clamp() in main CSS */
  
  .section__text h1 {
    font-size: 2.5rem;
  }
  
  .section__text__p2 {
    font-size: 1.2rem;
  }
  
  .about-containers {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .skills-category {
    padding: 2rem;
  }
  
  .skills-sub-title {
    font-size: 1.5rem;
  }
  
  .projects-container {
    gap: 2rem;
  }
  
  .publications-container {
    grid-template-columns: 1fr;
  }
  
  .certificates-container {
    grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
  }
  
  .certificates-gallery {
    grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
  }
}

/* Mobile Landscape and Small Tablets */
@media screen and (max-width: 768px) {
  section {
    padding: 2.5rem 4%;
    min-height: auto;
  }
  
  .logo {
    font-size: 1.2rem;
  }
  
  /* Profile picture is now responsive via clamp() in main CSS */
  
  .section__text h1 {
    font-size: 2rem;
  }
  
  .section__text__p2 {
    font-size: 1.1rem;
  }
  
  .profile-description {
    font-size: 1rem;
  }
  
  .btn {
    padding: 0.8rem 1.5rem;
    font-size: 0.95rem;
  }
  
  .details-container {
    padding: 1.5rem;
  }
  
  .details-container h3 {
    font-size: 1.1rem;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .project-image {
    height: 200px;
  }
  
  .project-content {
    padding: 1.5rem;
  }
  
  .project-title {
    font-size: 1.3rem;
  }
  
  .publication-card {
    flex-direction: column;
    padding: 2rem;
  }
  
  .publication-icon {
    font-size: 2.5rem;
  }
  
  .certificates-container {
    grid-template-columns: 1fr;
  }
  
  .certificates-gallery {
    grid-template-columns: 1fr;
  }
  
  .certificate-gallery-item {
    aspect-ratio: 16 / 11;
  }
  
  .contact-info-upper-container {
    flex-direction: column;
    width: 100%;
  }
  
  .contact-info-container {
    width: 100%;
    justify-content: center;
  }

  #socials-container {
    position: relative;
  }

  .wechat-card {
    position: static;
  }

  .wechat-card .wechat-qr-popup {
    left: 50%;
    right: auto;
    bottom: calc(100% + 10px);
    width: min(88vw, 230px);
    min-width: 0;
    padding: 0.75rem;
    transform: translate(-50%, 8px) scale(0.94);
  }

  .wechat-card:hover .wechat-qr-popup,
  .wechat-card:focus-within .wechat-qr-popup,
  .wechat-card[open] .wechat-qr-popup {
    transform: translate(-50%, -2px) scale(1);
  }

  .wechat-card .wechat-qr-popup img {
    width: min(56vw, 150px);
    height: auto;
  }
}

/* Mobile Phones */
@media screen and (max-width: 600px) {
  section {
    padding: 2rem 3%;
  }
  
  nav {
    padding: 1rem 3%;
  }
  
  .logo {
    font-size: 1rem;
  }
  
  .title {
    font-size: 1.8rem;
    margin-bottom: 2rem;
  }
  
  .section__text__p1 {
    font-size: 0.85rem;
  }
  
  #home {
    padding-top: 5rem;
  }
  
  /* Profile picture is now responsive via clamp() in main CSS */
  
  .section__text h1 {
    font-size: 1.8rem;
  }
  
  .section__text__p2 {
    font-size: 1rem;
  }
  
  .profile-description {
    font-size: 0.95rem;
  }
  
  .btn-container {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
    padding: 0.9rem;
  }

  .btn:hover,
  .btn-color-1:hover,
  .btn-color-2:hover {
    transform: translateY(-2px);
  }
  
  #socials-container {
    gap: 1rem;
  }
  
  .icon {
    height: 2rem;
    width: 2rem;
  }
  
  .details-container {
    padding: 1.2rem;
  }
  
  .details-container h3 {
    font-size: 1rem;
  }
  
  .text-container {
    padding: 1rem;
  }
  
  .text-container p {
    font-size: 0.95rem;
    text-align: justify;
  }
  
  .skills-category {
    padding: 1.5rem;
  }
  
  .skills-sub-title {
    font-size: 1.3rem;
  }
  
  .skill-item {
    padding: 1.2rem;
  }
  
  .skill-header h3 {
    font-size: 1rem;
  }
  
  .projects-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .project-image {
    height: 180px;
  }
  
  .project-content {
    padding: 1.2rem;
  }
  
  .project-title {
    font-size: 1.2rem;
  }
  
  .project-description {
    font-size: 0.95rem;
  }
  
  .project-btn {
    padding: 0.7rem 1.2rem;
    font-size: 0.9rem;
  }
  
  .publication-card {
    padding: 1.5rem;
  }
  
  .publication-icon {
    font-size: 2rem;
  }
  
  .publication-title {
    font-size: 1.2rem;
  }
  
  .publication-description {
    font-size: 0.95rem;
  }
  
  .certificate-card {
    padding: 1.5rem;
  }
  
  .certificate-icon {
    font-size: 2.5rem;
  }
  
  .certificate-content h3 {
    font-size: 1.1rem;
  }
  
  .contact-info-container {
    padding: 1.2rem 1.5rem;
    flex-direction: column;
    text-align: center;
  }
  
  .contact-info-container p {
    font-size: 1rem;
  }
  
  footer {
    padding: 1.5rem 3%;
  }
  
  footer .nav-links {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
  }
  
  footer p {
    font-size: 0.85rem;
    margin-top: 1rem;
  }
}

/* Extra Small Phones */
@media screen and (max-width: 480px) {
  /* Profile picture is now responsive via clamp() in main CSS */
  
  .section__text h1 {
    font-size: 1.5rem;
  }
  
  .title {
    font-size: 1.5rem;
  }
  
  .theme-btn {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1rem;
  }
  
  .hamburger-icon {
    width: 1.5625rem;
  }

  .menu-links {
    max-width: min(280px, 85vw);
  }
  
  .project-image {
    height: 160px;
  }
}

/* Landscape Mode for Phones */
@media screen and (max-height: 600px) and (orientation: landscape) {
  section {
    min-height: auto;
    padding: 3rem 5%;
  }
  
  #home {
    flex-direction: row;
    gap: 2rem;
  }
  
  /* Profile picture is now responsive via clamp() in main CSS */
  
  .section__text h1 {
    font-size: 1.8rem;
  }
}

/* High Resolution Displays */
@media screen and (min-width: 1920px) {
  .container {
    max-width: 1600px;
    margin: 0 auto;
  }
  
  section {
    padding: 5rem 10%;
  }
  
  .title {
    font-size: 3.5rem;
  }
  
  .profile-pic {
    width: 450px;
    height: 450px;
    aspect-ratio: 1 / 1;
  }
}

/* Print Styles */
@media print {
  nav, .theme-toggle, .arrow, #loading-screen, .scroll-progress {
    display: none;
  }
  
  section {
    page-break-inside: avoid;
    min-height: auto;
  }
  
  .btn {
    border: 1px solid #000;
  }
  
  a {
    text-decoration: underline;
  }
}

/* ===== BLOG RESPONSIVE DESIGN ===== */
@media screen and (max-width: 1200px) {
  .featured-post {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .blog-grid {
    grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  }
}

@media screen and (max-width: 768px) {
  .featured-post {
    padding: 1.5rem;
  }
  
  .featured-post .blog-post-title {
    font-size: 1.5rem;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .blog-post-image,
  .featured-post .blog-post-image {
    height: 250px;
  }
  
  .blog-newsletter {
    padding: 2rem 1.5rem;
  }
  
  .newsletter-title {
    font-size: 1.5rem;
  }
}

@media screen and (max-width: 480px) {
  .blog-post-image,
  .featured-post .blog-post-image {
    height: 200px;
  }
  
  .blog-icon {
    font-size: 3rem;
  }
  
  .featured-post .blog-post-title {
    font-size: 1.3rem;
  }
  
  .blog-grid .blog-post-title {
    font-size: 1.1rem;
  }
  
  .blog-meta {
    font-size: 0.75rem;
  }
  
  .blog-tags {
    gap: 0.3rem;
  }
  
  .blog-tag {
    font-size: 0.7rem;
    padding: 0.3rem 0.6rem;
  }
}


/* ===== ABOUT HOME SECTION RESPONSIVE ===== */
@media screen and (max-width: 1200px) {
  #about-home {
    padding: 6rem 5%;
  }
  
  .about-info-cards {
    grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
    gap: 1.5rem;
  }
  
  .about-details {
    padding: 2.5rem;
  }
}

@media screen and (max-width: 900px) {
  #about-home .title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
  }
  
  .about-subtitle {
    font-size: 1.5rem;
  }
  
  .skills-highlight {
    gap: 0.8rem;
  }
  
  .skill-tag {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }
}

@media screen and (max-width: 768px) {
  #about-home {
    padding: 4rem 4%;
  }
  
  #about-home .title {
    font-size: 2rem;
    margin-bottom: 2.5rem;
  }
  
  .info-card {
    padding: 2rem 1.5rem;
  }
  
  .info-icon {
    font-size: 3rem;
  }
  
  .info-card h3 {
    font-size: 1.3rem;
  }
  
  .about-details {
    padding: 2rem;
  }
  
  .about-subtitle {
    font-size: 1.3rem;
  }
  
  .about-text p {
    font-size: 1rem;
  }
}

@media screen and (max-width: 600px) {
  #about-home {
    padding: 3rem 3%;
  }
  
  #about-home .title {
    font-size: 1.8rem;
    margin-bottom: 2rem;
  }
  
  .info-card {
    padding: 1.5rem;
  }
  
  .info-icon {
    font-size: 2.5rem;
  }
  
  .info-card h3 {
    font-size: 1.2rem;
  }
  
  .info-detail {
    font-size: 1rem;
  }
  
  .info-sub {
    font-size: 0.9rem;
  }
  
  .about-details {
    padding: 1.5rem;
  }
  
  .about-subtitle {
    font-size: 1.2rem;
  }
  
  .about-text p {
    font-size: 0.95rem;
  }
  
  .skills-highlight {
    gap: 0.6rem;
  }
  
  .skill-tag {
    padding: 0.5rem 0.9rem;
    font-size: 0.85rem;
  }
  
  .about-cta .btn {
    width: 100%;
    padding: 0.9rem;
  }
}

@media screen and (max-width: 480px) {
  #about-home .title {
    font-size: 1.5rem;
  }
  
  .about-subtitle {
    font-size: 1.1rem;
  }
  
  .skill-tag {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
}

/* ===== ABOUT PAGE (about.html) RESPONSIVE ===== */
@media screen and (max-width: 900px) {
  #about-header {
    padding: 4rem 5%;
  }

  #about-research,
  #about-academics,
  #about-leadership,
  #about-internship-impact,
  #about-skills-section,
  #about-connect {
    padding: 3.5rem 5%;
  }

  .about-edu-info h3 {
    font-size: 1.2rem;
  }

  .yoongwin-split-layout {
    grid-template-columns: 1fr;
  }

  .yoongwin-internship-video {
    max-height: 320px;
  }

  .about-connect-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
    gap: 1.2rem;
  }
}

@media screen and (max-width: 768px) {
  #about-header {
    padding: 3rem 4%;
  }

  #about {
    padding: 2.5rem 4%;
  }

  #about-research,
  #about-academics,
  #about-leadership,
  #about-internship-impact,
  #about-skills-section,
  #about-connect {
    padding: 3rem 4%;
  }

  .about-edu-info {
    padding: 1.5rem;
  }

  .about-edu-info h3 {
    font-size: 1.1rem;
    word-break: break-word;
  }

  .about-honor-card {
    padding: 1.2rem;
  }

  .about-role-card {
    padding: 1.5rem;
  }

  .yoongwin-video-card {
    padding: 0.9rem;
  }

  .yoongwin-internship-video {
    max-height: 280px;
  }

  .about-skill-category {
    padding: 1.5rem;
  }

  .about-connect-card {
    padding: 1.2rem;
    gap: 1rem;
  }

  .about-connect-card i {
    font-size: 1.5rem;
  }

  .about-highlight-card {
    padding: 1.5rem;
  }

  .internship-impact-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

  .internship-impact-card {
    padding: 1.3rem;
  }

  .wechat-qr-section {
    max-width: 100%;
    padding: 0.5rem;
  }
}

@media screen and (max-width: 600px) {
  #about-header {
    padding: 2.5rem 3%;
  }

  #about {
    padding: 2rem 3%;
  }

  #about-research,
  #about-academics,
  #about-leadership,
  #about-internship-impact,
  #about-skills-section,
  #about-connect {
    padding: 2.5rem 3%;
  }

  .about-edu-info h3 {
    font-size: 1rem;
  }

  .about-connect-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .about-connect-intro {
    font-size: 0.95rem;
    margin-bottom: 2rem;
  }

  .about-connect-card {
    padding: 1rem 1.2rem;
  }

  .about-connect-card .connect-info span {
    font-size: 0.85rem;
  }

  .about-honors-grid {
    gap: 1rem;
  }

  .about-honor-card {
    padding: 1rem;
    gap: 0.8rem;
  }

  .about-honor-card .honor-body {
    min-width: 0;
  }

  .about-honor-card .honor-body h4 {
    font-size: 0.9rem;
    line-height: 1.35;
    overflow-wrap: anywhere;
  }

  .about-honor-card .honor-body p {
    font-size: 0.82rem;
    line-height: 1.5;
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .about-leadership-grid {
    gap: 1.5rem;
  }

  .about-role-card {
    padding: 1.2rem;
  }

  .yoongwin-split-layout {
    gap: 1rem;
  }

  .yoongwin-video-card {
    padding: 0.8rem;
  }

  .yoongwin-internship-video {
    max-height: 220px;
  }

  .about-highlight-card {
    padding: 1.2rem;
  }

  .about-publications h3 {
    font-size: 1.1rem;
  }

  .about-bio-card {
    padding: 1.5rem;
  }

  .about-lang-item {
    padding: 1rem;
  }

  .internship-impact-card {
    padding: 1.1rem;
  }

  .internship-impact-card h3 {
    font-size: 1rem;
  }

  .internship-impact-card li {
    font-size: 0.95rem;
    line-height: 1.6;
    overflow-wrap: break-word;
    word-break: break-word;
  }
}

@media screen and (max-width: 480px) {
  .about-connect-card i {
    font-size: 1.4rem;
  }

  .about-honor-card .honor-icon {
    font-size: 1.3rem;
  }

  .about-highlight-icon {
    font-size: 1.5rem;
  }

  .about-role-card .role-title {
    font-size: 0.9rem;
  }

  .about-role-card h3 {
    font-size: 1rem;
  }

  .about-skill-category h3 {
    font-size: 0.95rem;
  }

  .wechat-qr-section .wechat-qr-img {
    width: 130px;
    height: 130px;
  }
}