* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --navy-primary: #0a2463;
  --navy-dark: #051839;
  --navy-light: #1e3a8a;
  --accent-gold: #fbbf24;
  --accent-cyan: #06b6d4;
  --accent-red: #88214e;
  --accent-red-light: #88214e;
  --text-dark: #1a1a1a;
  --text-gray: #666;
  --bg-light: #f8fafc;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: #ffffff;
}

/* Header */
header {
  background: #ffffff;
  border-bottom: 2px solid var(--accent-red);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(139, 40, 80, 0.15);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-red);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo::before {
  content: "";
  display: inline-block;
  width: 120px; /* adjust size to fit your design */
  height: 60px;
  background-image: url("/assets/img/logo/aiclab_logo_red_long.PNG"); /* <-- path to your local file */
  background-size: contain; /* keep full image visible */
  background-repeat: no-repeat;
  background-position: center;
  vertical-align: middle; /* aligns with text */
  margin-right: 8px;
  font-size: 1.5rem;
}

.logo span {
  color: var(--accent-cyan);
  font-weight: 600;
}

.nav-menu {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--accent-red);
  margin: 3px 0;
  transition: all 0.3s ease;
  border-radius: 3px;
}

nav a {
  text-decoration: none;
  color: var(--text-gray);
  font-size: 1.05rem;
  font-weight: 600;
  transition: color 0.3s;
  position: relative;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

nav a:hover {
  color: var(--accent-red);
}

nav a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-red);
  transition: width 0.3s;
}

nav a:hover::after {
  width: 100%;
}

/* Back to Home Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-red);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 3rem;
  transition: color 0.3s;
}

.back-link:hover {
  color: var(--accent-gold);
}

.back-link i {
  transition: transform 0.3s;
}

.back-link:hover i {
  transform: translateX(-5px);
}

/* Hero Section with AI Background */
.hero {
  margin-top: 80px;
  padding: 0;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  position: relative;
  background: #ffffff;
  border-radius: 0;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

.hero-photo {
  width: 100%;
  max-width: 100%;
  height: 600px;
  margin: 0;
  position: relative;
  overflow: hidden;
  box-shadow: none;
}

.hero-photo::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.3) 0%,
    rgba(0, 0, 0, 0.1) 50%,
    rgba(0, 0, 0, 0.4) 100%
  );
  z-index: 1;
}

.hero-photo img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -1.5px;
  color: white;
  text-transform: uppercase;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
  position: absolute;
  z-index: 2;
  top: 35%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
}

.hero .subtitle {
  font-size: 1.3rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 0.5rem;
  font-weight: 400;
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  text-shadow: 1px 1px 6px rgba(0, 0, 0, 0.5);
}

.hero .tagline {
  font-size: 1.4rem;
  color: var(--accent-gold);
  margin-bottom: 0;
  font-weight: 700;
  letter-spacing: 2px;
  position: absolute;
  z-index: 2;
  top: 60%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  text-shadow: 1px 1px 6px rgba(0, 0, 0, 0.5);
}

/* Stats Section with Navy Theme */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  max-width: 1000px;
  margin: 4rem auto;
  padding: 0 2rem;
}

.stat-item {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: 12px;
  background: white;
  border: 3px solid #e5e7eb;
  color: var(--text-dark);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    transparent,
    rgba(136, 33, 78, 0.05),
    transparent
  );
  transition: left 0.5s;
}

.stat-item:hover::before {
  left: 100%;
}

.stat-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
  border-color: var(--accent-gold);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent-red);
  display: block;
  margin-bottom: 0.5rem;
  text-align: center;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-gray);
  font-weight: 500;
  text-align: center;
}

/* Section Styles */
section {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}

h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 3rem;
  text-align: center;
  letter-spacing: -0.5px;
  color: var(--accent-red);
  position: relative;
}

h2::after {
  content: "";
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-gold));
  margin: 1rem auto 0;
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(139, 40, 80, 0.3);
}

/* Team Grid */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
}

.team-member {
  text-align: center;
  padding: 2rem;
  border-radius: 16px;
  transition: transform 0.3s, box-shadow 0.3s;
  background: white;
  border: 2px solid transparent;
}

.team-member:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(139, 40, 80, 0.25);
  border-color: var(--accent-red);
}

.member-photo {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--accent-red) 0%,
    var(--accent-red-light) 100%
  );
  margin: 0 auto 1.5rem;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  font-weight: 700;
  border: 4px solid var(--accent-gold);
  box-shadow: 0 5px 20px rgba(139, 40, 80, 0.3);
  transition: transform 0.3s, box-shadow 0.3s;
}

.team-member:hover .member-photo {
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(139, 40, 80, 0.4);
}

.member-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform: translateZ(0);
  -webkit-font-smoothing: subpixel-antialiased;
}

/* White background for scaled-down profile pictures */
.member-photo:has(img[src*="chhun_rotanakkosal"]),
.member-photo:has(img[src*="pov_phannet"]) {
  background: white !important;
}

/* Specific adjustments for zoomed-in profile pictures */
.member-photo img[src*="chhun_rotanakkosal"],
.member-photo img[src*="pov_phannet"] {
  object-fit: cover;
  object-position: center 20%;
  transform: scale(0.85);
}

.member-photo img[src*="vorn_naro"] {
  object-fit: contain;
  background: white;
}

.member-photo img[src*="chan_sokheang"] {
  object-fit: cover;
  object-position: center;
  filter: brightness(1.1) contrast(1.05);
}

.member-photo img[src*="chhor_ratanaktepi"] {
  object-fit: cover;
  object-position: center 30%;
}

.member-photo img[src*="kong_vungsovanreach"] {
  object-fit: cover;
  object-position: center;
  transform: scale(1.15);
}

.member-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
  color: var(--accent-red);
}

.member-role {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.5;
}

/* Research Areas with AI Icons */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  align-items: stretch;
}

.research-card {
  padding: 2.5rem;
  border: 2px solid #e5e5e5;
  border-radius: 16px;
  transition: all 0.3s;
  background: white;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.research-card p {
  flex-grow: 1;
}

.research-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-gold));
  transform: scaleX(0);
  transition: transform 0.3s;
}

.research-card:hover::before {
  transform: scaleX(1);
}

.research-card:hover {
  border-color: var(--accent-red);
  box-shadow: 0 10px 30px rgba(139, 40, 80, 0.25);
  transform: translateY(-5px);
}

.research-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  filter: grayscale(0.3);
}

.research-icon i {
  color: var(--accent-red);
}

.research-card h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  font-weight: 700;
  color: var(--accent-red);
}

.research-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.8;
  text-align: justify;
}

.research-card > p {
  flex-grow: 1;
}

/* Publications */
.publication-list {
  max-width: 900px;
  margin: 0 auto;
}

.publication-item {
  padding: 2rem 2.5rem;
  margin-bottom: 1.5rem;
  border-left: 4px solid var(--accent-red);
  background: var(--bg-light);
  border-radius: 12px;
  transition: all 0.3s;
}

.publication-item:hover {
  border-left-color: var(--accent-gold);
  box-shadow: 0 5px 20px rgba(139, 40, 80, 0.15);
  transform: translateX(5px);
}

.publication-item h4 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
  color: var(--accent-red);
}

.publication-meta {
  font-size: 0.9rem;
  color: var(--text-gray);
  margin-bottom: 0.5rem;
}

.publication-venue {
  font-size: 0.9rem;
  color: var(--accent-red-light);
  font-weight: 600;
}

/* Footer */
/* Footer Styles */
footer {
  background: linear-gradient(
    135deg,
    var(--accent-red) 0%,
    var(--accent-red-light) 100%
  );
  color: #ffffff;
  margin-top: 6rem;
  position: relative;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-gold));
}

/* @media (min-width: 1024px) { */
  .footer-main {
    padding: 4rem 2rem 2rem;
    position: relative;
  }
/* } */
.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.footer-section h3 {
  margin-bottom: 1.5rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-gold);
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-section h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--accent-red);
  border-radius: 2px;
}

/*  */
/* Stack children vertically (logo on top, text below) */
.footer-section.footer-about {
  display: flex;
  flex-direction: column; /* <-- key: vertical layout */
  align-items: flex-start; /* left-align; use center if you want centered */
  text-align: left;
  gap: 12px; /* space between logo and heading */
}

/* Logo container (optional fixed size; can be auto) */
.footer-section.footer-about .container {
  width: 200px;
  height: 100px;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

/* Logo image */
@media (min-width: 1024px) {
  .footer-about .footer-logo {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: left center;
    margin: 0;
    float: none;
    position: relative;
    left: -37px;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .footer-about .footer-logo {
    /* background-color: wheat; */
    position: relative;
    left: -20px; /* ✅ only change what’s different */
  }
}

@media (max-width: 768px) {
  .footer-about .footer-logo {
    /* background-color: wheat; */
    position: relative;
    left: -20px; /* ✅ only change what’s different */
  }
}

/*  */

/* Footer About Section */
.footer-about .footer-logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: left center;
  display: block;
}

.footer-tagline {
  color: var(--accent-white);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  line-height: 1.4;
}

.footer-description {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Footer Links Section */
.footer-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-menu li {
  margin-bottom: 0.8rem;
}

.footer-menu a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s;
}

.footer-menu a i {
  font-size: 0.7rem;
  transition: transform 0.3s;
}

.footer-menu a:hover {
  color: var(--accent-gold);
  transform: translateX(5px);
}

.footer-menu a:hover i {
  transform: translateX(3px);
}

/* Footer Contact Section */
.contact-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.contact-item i {
  color: var(--accent-white);
  font-size: 1.2rem;
  margin-top: 0.2rem;
  min-width: 20px;
}

.contact-item strong {
  display: block;
  color: var(--accent-white);
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-item p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.contact-item a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s;
}

.contact-item a:hover {
  color: var(--accent-gold);
}

/* Footer Bottom */
.footer-bottom {
  background: rgba(0, 0, 0, 0.3);
  padding: 1.5rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
  margin: 0;
}

.footer-affiliation {
  color: rgba(255, 255, 255, 0.5);
  font-style: italic;
}

/* Philosophy Section with Core Values */
.philosophy {
  text-align: center;
  padding: 5rem 2rem;
  background: linear-gradient(
    135deg,
    rgba(10, 36, 99, 0.05) 0%,
    rgba(6, 182, 212, 0.05) 100%
  );
  margin: 6rem 0;
  border-radius: 20px;
  position: relative;
}

.philosophy::before {
  content: "\f140";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  top: 30px;
  left: 5%;
  font-size: 4rem;
  opacity: 0.1;
  color: var(--accent-red);
}

.philosophy::after {
  content: "\f135";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  bottom: 30px;
  right: 5%;
  font-size: 4rem;
  opacity: 0.1;
  color: var(--accent-red);
}

.philosophy-content {
  max-width: 900px;
  margin: 0 auto;
}

.philosophy h2 {
  margin-bottom: 2.5rem;
}

.philosophy p {
  font-size: 1.1rem;
  color: var(--text-gray);
  line-height: 2;
  margin-bottom: 1.5rem;
}

.philosophy p strong {
  color: var(--accent-red);
  font-weight: 700;
}

.values {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-top: 4rem;
}

.value-item {
  text-align: center;
  padding: 2rem;
  background: white;
  border-radius: 16px;
  box-shadow: 0 5px 20px rgba(139, 40, 80, 0.15);
  transition: transform 0.3s, box-shadow 0.3s;
  min-width: 150px;
  border: 2px solid transparent;
}

.value-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 10px 30px rgba(139, 40, 80, 0.25);
  border-color: var(--accent-red);
}

.value-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--accent-red);
}

.value-icon i {
  color: var(--accent-red);
}

.value-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-red);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Timeline Section */
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: linear-gradient(
    180deg,
    var(--accent-red) 0%,
    var(--accent-gold) 100%
  );
  border-radius: 2px;
}

.timeline-item {
  display: flex;
  align-items: center;
  margin-bottom: 3rem;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-date {
  flex: 0 0 200px;
  text-align: center;
  padding: 1rem;
  background: white;
  border: 3px solid #e5e7eb;
  border-radius: 12px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  margin: 0 2rem;
  transition: all 0.3s;
}

.timeline-item:nth-child(even) .timeline-date {
  text-align: center;
}

.timeline-date:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
  border-color: #d1d5db;
}

.date-month {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-red);
  text-transform: uppercase;
}

.date-year {
  display: block;
  font-size: 1rem;
  color: var(--text-gray);
  font-weight: 600;
  margin-top: 0.3rem;
}

.timeline-content {
  flex: 1;
  background: white;
  border: 3px solid #e5e7eb;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  position: relative;
  transition: all 0.3s;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  border-color: #d1d5db;
}

.timeline-content::before {
  content: "";
  position: absolute;
  top: 50%;
  width: 0;
  height: 0;
  border: 15px solid transparent;
  transform: translateY(-50%);
}

.timeline-item:nth-child(odd) .timeline-content::before {
  left: -30px;
  border-right-color: var(--accent-red);
}

.timeline-item:nth-child(even) .timeline-content::before {
  right: -30px;
  border-left-color: var(--accent-red);
}

.timeline-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  background: white;
  border: 4px solid var(--accent-red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--accent-red);
  z-index: 10;
  box-shadow: 0 5px 15px rgba(139, 40, 80, 0.3);
  transition: all 0.3s;
}

.timeline-item:hover .timeline-icon {
  background: var(--accent-red);
  color: white;
  transform: translate(-50%, -50%) scale(1.1);
}

.timeline-content h4 {
  font-size: 1.3rem;
  color: var(--accent-red);
  margin-bottom: 0.8rem;
  font-weight: 700;
}

.timeline-content p {
  color: var(--text-gray);
  line-height: 1.7;
  font-size: 1rem;
}

/* AI Visual Elements */
.ai-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.03;
  background-image: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 50px,
      var(--navy-primary) 50px,
      var(--navy-primary) 51px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 50px,
      var(--navy-primary) 50px,
      var(--navy-primary) 51px
    );
}

/* ============================================
           RESPONSIVE DESIGN - MOBILE FIRST APPROACH
           ============================================ */

/* Tablet (iPad and similar) */
@media (max-width: 1024px) {
  nav {
    padding: 1.2rem 2rem;
  }

  .hero {
    padding: 0;
    margin-top: 90px;
  }

  .hero h1 {
    font-size: 3rem;
    top: 35%;
  }

  .hero .subtitle {
    top: 50%;
  }

  .hero .tagline {
    top: 60%;
  }

  .hero-photo {
    height: 500px;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    padding: 0 2rem;
  }

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

/* Mobile and Small Tablets */
@media (max-width: 768px) {
  /* Navigation */
  nav {
    padding: 1rem 1.5rem;
  }

  .logo::before {
    width: 120px;
    height: 60px;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
  }

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
  }

  .nav-menu {
    position: fixed;
    top: 77px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 77px);
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 3rem 0;
    gap: 0;
    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-menu li {
    margin: 0;
    padding: 0;
    border-bottom: 1px solid rgba(10, 36, 99, 0.1);
  }

  .nav-menu li:last-child {
    border-bottom: none;
  }

  nav a {
    display: block;
    padding: 1.2rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-red);
    transition: all 0.3s ease;
  }

  nav a:hover {
    background: linear-gradient(
      135deg,
      rgba(10, 36, 99, 0.05) 0%,
      rgba(6, 182, 212, 0.05) 100%
    );
    padding-left: 2.5rem;
  }

  nav a::after {
    display: none;
  }

  /* Back Link */
  .back-link {
    font-size: 0.95rem;
    margin-bottom: 2rem;
  }

  /* Hero Section */
  .hero {
    margin-top: 77px;
    padding: 0;
  }

  .hero h1 {
    font-size: 2.5rem;
    letter-spacing: -1px;
    top: 35%;
  }

  .hero .subtitle {
    font-size: 1rem;
    line-height: 1.5;
    top: 50%;
  }

  .hero .tagline {
    font-size: 1.2rem;
    letter-spacing: 1.5px;
    margin-bottom: 0;
    top: 60%;
  }

  .hero-photo {
    width: 100%;
    max-width: 100%;
    height: 400px;
    border-radius: 0;
    margin: 0;
  }

  .hero-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
  }

  /* Stats */
  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 0 1.5rem;
    margin: 3rem auto;
  }

  .stat-item {
    padding: 1.5rem 1rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-item:last-child .stat-number {
    font-size: 1.7rem;
  }

  /* Sections */
  section {
    margin: 4rem auto;
    padding: 0 1.5rem;
  }

  h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
  }

  /* Professor Welcome (inline styles need override) */
  section[style*="max-width: 900px"] {
    margin: 4rem 1.5rem !important;
    padding: 2.5rem 1.5rem !important;
  }

  section[style*="max-width: 900px"] h2 {
    font-size: 1.8rem !important;
  }

  section[style*="max-width: 900px"] p {
    font-size: 1rem !important;
    line-height: 1.7 !important;
  }

  section[style*="max-width: 900px"] div {
    font-size: 2.5rem !important;
  }

  /* Philosophy */
  .philosophy {
    padding: 3rem 1.5rem;
    margin: 4rem 0;
  }

  .philosophy p {
    font-size: 1rem;
    line-height: 1.8;
  }

  .values {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
  }

  .value-item {
    flex: 1 1 calc(50% - 1rem);
    min-width: 140px;
    max-width: 200px;
    padding: 1.5rem 1rem;
  }

  /* Timeline - Mobile */
  .timeline::before {
    left: 30px;
  }

  .timeline-item {
    flex-direction: column !important;
    align-items: flex-start;
    padding-left: 60px;
    margin-bottom: 2rem;
  }

  .timeline-date {
    flex: none;
    margin: 0 0 1rem 0;
    width: auto;
  }

  .timeline-content {
    width: 100%;
  }

  .timeline-content::before {
    display: none;
  }

  .timeline-icon {
    left: 30px;
    transform: translateY(-50%);
  }

  .timeline-item:hover .timeline-icon {
    transform: translateY(-50%) scale(1.1);
  }

  /* Team Grid */
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .team-member {
    padding: 1.5rem 1rem;
  }

  .member-photo {
    width: 100px;
    height: 100px;
    font-size: 1.8rem;
    border-width: 3px;
  }

  .member-name {
    font-size: 1rem;
  }

  .member-role {
    font-size: 0.85rem;
  }

  /* Research Grid */
  .research-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .research-card {
    padding: 2rem 1.5rem;
  }

  .research-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
  }

  .research-card h3 {
    font-size: 1.3rem;
  }

  .research-card p {
    font-size: 0.95rem;
  }

  /* Publications */
  .publication-item {
    padding: 1.5rem;
    margin-bottom: 1rem;
  }

  .publication-item h4 {
    font-size: 1.1rem;
  }

  .publication-meta,
  .publication-venue {
    font-size: 0.85rem;
  }

  /* Footer */
  /* Footer - Mobile */
  .footer-main {
    padding: 3rem 1.5rem 2rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1.2rem;
  }

  footer p {
    font-size: 0.8rem;
    line-height: 1.5;
  }
}

/* Small Mobile Phones */
@media (max-width: 480px) {
  /* Navigation */
  nav {
    padding: 0.8rem 1rem;
  }

  .logo::before {
    width: 100px;
    height: 50px;
  }

  /* Back Link */
  .back-link {
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
  }

  /* Hero */
  .hero {
    padding: 0;
  }

  .hero h1 {
    font-size: 2rem;
    top: 35%;
  }

  .hero .subtitle {
    font-size: 0.9rem;
    top: 50%;
  }

  .hero .tagline {
    font-size: 1rem;
    letter-spacing: 1px;
    margin-bottom: 0;
    top: 60%;
  }

  .hero-photo {
    max-width: 100%;
    height: 300px;
    margin: 0;
  }

  /* Stats - Single Column on Very Small Screens */
  .stats {
    grid-template-columns: 1fr;
    padding: 0 1rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-item:last-child .stat-number {
    font-size: 1.6rem;
  }

  .stat-label {
    font-size: 0.9rem;
  }

  /* Sections */
  section {
    padding: 0 1rem;
    margin: 3rem auto;
  }

  h2 {
    font-size: 1.6rem;
  }

  h2::after {
    width: 60px;
    height: 3px;
  }

  /* Professor Welcome */
  section[style*="max-width: 900px"] {
    margin: 3rem 1rem !important;
    padding: 2rem 1rem !important;
    border-radius: 16px !important;
  }

  section[style*="max-width: 900px"] div {
    font-size: 2rem !important;
  }

  section[style*="max-width: 900px"] h2 {
    font-size: 1.5rem !important;
  }

  section[style*="max-width: 900px"] p {
    font-size: 0.95rem !important;
  }

  /* Philosophy */
  .philosophy {
    padding: 2.5rem 1rem;
  }

  .values {
    flex-direction: column;
    gap: 1rem;
  }

  .value-item {
    flex: 1 1 100%;
    max-width: 100%;
  }

  .value-icon {
    font-size: 2.5rem;
  }

  .value-text {
    font-size: 1rem;
  }

  /* Timeline - Small Mobile */
  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    padding-left: 50px;
  }

  .timeline-icon {
    left: 20px;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .timeline-date {
    padding: 0.8rem;
  }

  .date-month {
    font-size: 1.2rem;
  }

  .date-year {
    font-size: 0.9rem;
  }

  .timeline-content {
    padding: 1.5rem;
  }

  .timeline-content h4 {
    font-size: 1.1rem;
  }

  .timeline-content p {
    font-size: 0.95rem;
  }

  /* Team Grid - Single Column */
  .team-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .team-member {
    padding: 1.5rem;
  }

  .member-photo {
    width: 110px;
    height: 110px;
  }

  /* Research Cards */
  .research-card {
    padding: 1.5rem;
  }

  .research-icon {
    font-size: 2.5rem;
  }

  /* Publications */
  .publication-item {
    padding: 1.2rem;
  }

  /* Footer - Small Mobile */
  .footer-main {
    padding: 2.5rem 1rem 1.5rem;
  }

  .footer-bottom-content {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }

  .footer-section h3 {
    font-size: 1.1rem;
  }

  .footer-about .footer-logo {
    width: 120px;
  }

  .contact-item {
    font-size: 0.85rem;
  }
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Additional Professional Touches */
::selection {
  background: var(--accent-cyan);
  color: white;
}

/* Font Awesome Icon Styling */
h2 i.fas {
  color: var(--accent-red);
  margin-right: 0.5rem;
}

.research-icon i.fas {
  color: var(--accent-red);
  font-size: 3rem;
  display: block;
  margin-bottom: 1.5rem;
}

.value-icon i.fas {
  color: var(--accent-red);
  font-size: 3rem;
}

/* Loading Animation for Stats */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stat-item {
  animation: fadeInUp 0.6s ease-out;
  animation-fill-mode: both;
}

.stat-item:nth-child(1) {
  animation-delay: 0.1s;
}
.stat-item:nth-child(2) {
  animation-delay: 0.2s;
}
.stat-item:nth-child(3) {
  animation-delay: 0.3s;
}
.stat-item:nth-child(4) {
  animation-delay: 0.4s;
}