/* ================================================================
   RESPONSIVE & TYPOGRAPHY IMPROVEMENTS
   Add <link rel="stylesheet" href="improvements.css"> AFTER your
   Font Awesome link in index.html, publications.html, certifications.html
   ================================================================ */

/* ---- FONT UPGRADE ---- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

body {
  font-family: 'Plus Jakarta Sans', 'Nunito Sans', sans-serif;
  letter-spacing: -0.01em;
}

/* Slightly tighter headings for polish */
h2.section-heading {
  letter-spacing: -0.02em;
}

/* Improve mono label crispness */
.section-label,
.hero-label,
.edu-year,
.cert-year,
.award-year,
.pub-type,
.pub-year,
.news-item-source,
.news-item-date,
.b-card-tag,
.tl-year,
.chip {
  font-feature-settings: 'tnum' 1;
}

/* Better body text readability */
.about-body p,
.section-desc,
.hero-bio,
.news-item-excerpt,
.pub-authors,
.b-card-excerpt,
.tl-org,
.s-card p,
.info-card p {
  letter-spacing: 0.005em;
}

/* ---- EXTRA-LARGE SCREENS (1400px+) ---- */
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
    padding: 0 56px;
  }

  /* Bigger hero on wide screens */
  .hero-name {
    font-size: 72px;
  }
  .hero-bio {
    font-size: 19px;
    max-width: 580px;
  }
  .hero .container {
    gap: 88px;
  }

  /* Wider grids */
  .research-grid {
    gap: 28px;
  }
  .skills-cols {
    gap: 48px;
  }
  .news-list {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
  }
  .blog-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
  }

  /* Section padding */
  .about,
  .research,
  .skills,
  .leadership,
  .news,
  .blog,
  .contact {
    padding-top: 130px;
    padding-bottom: 130px;
  }

  /* Pub / cert pages */
  .pub-section {
    padding: 100px 0;
  }
  .cert-section {
    padding: 100px 0;
  }
  .cert-grid {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
  }
}

/* ---- ULTRA-WIDE SCREENS (1600px+) ---- */
@media (min-width: 1600px) {
  .container {
    max-width: 1440px;
    padding: 0 72px;
  }

  .hero-name {
    font-size: 78px;
  }
  h2.section-heading {
    font-size: 56px;
  }

  .hero .container {
    gap: 100px;
  }

  .research-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .news-list,
  .blog-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
}

/* ---- LARGE LAPTOPS (1024px – 1200px) ---- */
@media (min-width: 1024px) and (max-width: 1200px) {
  .container {
    max-width: 1000px;
    padding: 0 40px;
  }

  .hero .container {
    gap: 48px;
  }
  .hero-name {
    font-size: clamp(38px, 4.5vw, 56px);
  }

  .about .container {
    gap: 48px;
  }

  .skills-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

/* ---- TABLETS (768px – 1024px) ---- */
@media (min-width: 768px) and (max-width: 1024px) {
  .container {
    padding: 0 32px;
  }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual {
    max-width: 420px;
  }
  .hero-name {
    font-size: clamp(36px, 5vw, 52px);
  }

  .about .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .research-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .skills-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }

  .news-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Pub / cert pages */
  .pub-card {
    gap: 16px;
  }
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Section padding */
  .about,
  .research,
  .skills,
  .leadership,
  .news,
  .blog,
  .contact {
    padding-top: 80px;
    padding-bottom: 80px;
  }
  .pub-section,
  .cert-section {
    padding: 60px 0;
  }
}

/* ---- PHONES (below 768px) ---- */
@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }
  nav {
    padding: 0 20px;
    height: 60px;
  }

  .hero {
    padding: 80px 0 48px;
  }
  .hero .container {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-visual {
    max-width: 320px;
  }
  .hero-name {
    font-size: clamp(32px, 9vw, 44px);
    line-height: 1.1;
  }
  .hero-bio {
    font-size: 16px;
    line-height: 1.7;
  }
  .hero-btns {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .btn {
    justify-content: center;
    padding: 14px 24px;
  }
  .hero-chips {
    gap: 6px;
  }
  .chip {
    font-size: 11px;
    padding: 6px 12px;
  }

  h2.section-heading {
    font-size: clamp(26px, 7vw, 36px);
  }

  .about .container {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .about-body p {
    font-size: 16px;
  }

  .research-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .r-card {
    padding: 24px 20px;
  }

  .skills-cols {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .news-list {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .news-item {
    padding: 20px;
  }
  .news-item-title {
    font-size: 17px;
  }

  .blog-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .blog-top {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .timeline::before {
    left: 18px;
  }
  .tl-item {
    gap: 20px;
  }
  .tl-item .icon-circle {
    width: 38px;
    height: 38px;
    min-width: 38px;
    font-size: 14px;
  }

  /* Sections */
  .about,
  .research,
  .skills,
  .leadership,
  .news,
  .blog {
    padding-top: 64px;
    padding-bottom: 64px;
  }
  .contact {
    padding: 80px 0 64px;
  }

  /* Pagination smaller */
  .news-pagination button,
  .blog-pagination button {
    min-width: 34px;
    height: 34px;
    font-size: 12px;
    padding: 0 10px;
  }

  /* Pub / cert pages */
  .page-hero {
    padding: 90px 0 40px;
  }
  .pub-section,
  .cert-section {
    padding: 48px 0;
  }
  .pub-card {
    flex-direction: column;
    gap: 14px;
    padding: 20px;
  }
  .pub-title {
    font-size: 17px;
  }
  .cert-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .cert-card,
  .award-card {
    padding: 20px;
    gap: 14px;
  }
  .member-item {
    padding: 14px 18px;
    gap: 12px;
  }
  .profile-links {
    flex-direction: column;
    gap: 10px;
  }
  .profile-link {
    justify-content: center;
    padding: 12px 20px;
    font-size: 13px;
  }

  /* Contact */
  .contact-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .contact-actions .btn {
    justify-content: center;
    font-size: 13px;
  }
  .socials {
    gap: 10px;
  }
  .social-link {
    width: 44px;
    height: 44px;
    font-size: 16px;
  }
}

/* ---- SMALL PHONES (below 400px) ---- */
@media (max-width: 400px) {
  .container {
    padding: 0 14px;
  }
  nav {
    padding: 0 14px;
  }

  .hero-name {
    font-size: 28px;
  }
  h2.section-heading {
    font-size: 24px;
  }
  .hero-bio {
    font-size: 15px;
  }
  .section-label {
    font-size: 11px;
    letter-spacing: 2px;
  }

  .r-card {
    padding: 20px 16px;
  }
  .r-card h3 {
    font-size: 17px;
  }
  .r-card p {
    font-size: 14px;
  }

  .skill-tag {
    padding: 7px 14px;
    font-size: 13px;
  }

  .b-card-body {
    padding: 18px;
  }
  .b-card-title {
    font-size: 17px;
  }

  .contact .section-heading {
    font-size: clamp(24px, 7vw, 36px);
  }
}

/* ---- LANDSCAPE PHONES ---- */
@media (max-width: 767px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: 80px 0 40px;
  }
  .hero .container {
    grid-template-columns: 1fr 0.8fr;
    gap: 24px;
  }
  .hero-visual {
    max-width: 240px;
  }
}

/* ---- PRINT ---- */
@media print {
  nav, .marquee, .hero-btns, .contact-actions, .socials,
  .news-pagination, .blog-pagination, .back-top, .mobile-toggle {
    display: none !important;
  }
  .hero {
    min-height: auto;
    padding: 20px 0;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
  body {
    font-size: 12pt;
    color: #000;
  }
}