* {
  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: #8b2850;
  --accent-red-light: #a03060;
  --text-dark: #1a1a1a;
  --text-gray: #666;
  --bg-light: #f8fafc;
}

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

header {
    /* margin: 0; */
  /* background: #b11414; */
  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;
}

/* .header1 {
  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;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo::before {
  content: "";
  display: inline-block;
  width: 120px;
  height: 60px;
  background-image: url("/assets/img/logo/aiclab_logo_red_long.PNG");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  vertical-align: middle;
  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-link {
  color: var(--accent-red);
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem 1.5rem;
  border: 2px solid var(--accent-red);
  border-radius: 8px;
  transition: all 0.3s;
}

.back-link:hover {
  background: var(--accent-red);
  color: white;
}

.profile-container {
  max-width: 1000px;
  margin: 9rem auto 4rem;
  padding: 0 2rem;
}

.profile-header {
  text-align: center;
  padding: 3rem;
  background: white;
  border-radius: 16px;
  border: 2px solid #e5e5e5;
  color: var(--text-dark);
  margin-bottom: 3rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.profile-photo {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: white;
  margin: 0 auto 2rem;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--accent-red);
  font-weight: 700;
  border: 5px solid var(--accent-gold);
  box-shadow: 0 5px 20px rgba(139, 40, 80, 0.3);
}

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

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

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

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

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

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

.profile-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.profile-header .position {
  font-size: 1.3rem;
  color: var(--accent-red);
  font-weight: 600;
  margin-bottom: 1rem;
}

.profile-header .expertise {
  font-size: 1.1rem;
  color: var(--text-gray);
}

.profile-section {
  background: white;
  padding: 2.5rem;
  margin-bottom: 2rem;
  border-radius: 16px;
  border: 2px solid #e5e5e5;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.profile-section h2 {
  color: var(--accent-red);
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

.profile-section h2 i.fas {
  margin-right: 0.5rem;
}

.profile-section p {
  color: var(--text-gray);
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 1rem;
}

.profile-section ul {
  list-style: none;
  padding-left: 0;
}

.profile-section ul li {
  color: var(--text-gray);
  font-size: 1.05rem;
  line-height: 1.8;
  padding-left: 2rem;
  position: relative;
  margin-bottom: 0.8rem;
}

.profile-section ul li::before {
  content: "▸";
  color: var(--accent-red);
  font-weight: bold;
  position: absolute;
  left: 0.5rem;
}

.highlight {
  background: linear-gradient(
    135deg,
    rgba(139, 40, 80, 0.05) 0%,
    rgba(160, 48, 96, 0.05) 100%
  );
  padding: 1.5rem;
  border-radius: 12px;
  border-left: 4px solid var(--accent-red);
  margin: 1.5rem 0;
}

/* 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));
}

.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;
}

.footer-section.footer-about {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: 12px;
}

.footer-section.footer-about .container {
  width: 200px;
  height: 100px;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

/* Logo image positioning for different screen sizes */
@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 {
    position: relative;
    left: -20px;
  }
}

@media (max-width: 768px) {
  .footer-about .footer-logo {
    position: relative;
    left: -20px;
  }
}

.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;
}

.contact-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.contact-item i {
  color: var(--accent-gold);
  font-size: 1.2rem;
  margin-top: 0.2rem;
}

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

.contact-item p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
  line-height: 1.6;
  font-size: 0.9rem;
}

.contact-item a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s;
}

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

.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;
}

/* Font Awesome Icon Styling */
.logo i.fas {
  color: var(--accent-red);
  margin-right: 0.3rem;
}

.back-link i.fas {
  margin-right: 0.3rem;
}

/* ============================================
   RESPONSIVE DESIGN - CLEAN & PROFESSIONAL
   ============================================ */

/* Tablet (iPad and similar) */
@media (max-width: 1024px) {
  .profile-container {
    padding: 0 2rem;
    margin: 8rem auto 3rem;
  }

  .profile-header {
    padding: 2.5rem 2rem;
  }

  .profile-header h1 {
    font-size: 2.3rem;
  }

  .profile-header .position {
    font-size: 1.25rem;
  }

  .profile-section {
    padding: 2rem;
  }

  .profile-section h2 {
    font-size: 1.7rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-main {
    padding: 3rem 2rem 2rem;
  }
}

/* Mobile and Small Tablets */
@media (max-width: 768px) {
  nav {
    margin: 0;
    padding: 0 0;
    min-height: auto;
  }
  header {
    margin: 0;
    padding: 0;
  }

  .logo {
    line-height: 1;
  }

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

  .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;
  }

  .nav-menu a {
    color: var(--accent-red);
    display: block;
    padding: 1.2rem 2rem;
    font-size: 1.1rem;
    border-bottom: 1px solid rgba(139, 40, 80, 0.1);
    transition: all 0.3s;
  }

  .nav-menu a:hover {
    background: linear-gradient(
      135deg,
      rgba(10, 36, 99, 0.05) 0%,
      rgba(139, 40, 80, 0.05) 100%
    );
    color: var(--accent-red);
    padding-left: 2.5rem;
  }

  .nav-menu a::after {
    display: none;
  }

  .back-link {
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
    white-space: nowrap;
  }

  .profile-container {
    padding: 0 1.5rem;
    margin: 7.5rem auto 2rem;
  }

  .profile-header {
    padding: 2.5rem 1.5rem;
    margin-bottom: 2rem;
    border-radius: 16px;
  }

  .profile-photo {
    width: 150px;
    height: 150px;
    font-size: 3.5rem;
    border-width: 4px;
    margin-bottom: 1.5rem;
  }

  .profile-header h1 {
    font-size: 2rem;
    margin-bottom: 0.8rem;
  }

  .profile-header .position {
    font-size: 1.2rem;
    margin-bottom: 1rem;
  }

  .profile-header .expertise {
    font-size: 1.05rem;
    line-height: 1.6;
  }

  .profile-section {
    padding: 2rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 12px;
  }

  .profile-section h2 {
    font-size: 1.6rem;
    margin-bottom: 1.2rem;
    padding-bottom: 0.8rem;
  }

  .profile-section p {
    font-size: 1.02rem;
    line-height: 1.8;
    margin-bottom: 1rem;
  }

  .profile-section ul {
    margin: 1rem 0;
  }

  .profile-section ul li {
    font-size: 1.02rem;
    line-height: 1.8;
    padding-left: 1.8rem;
    margin-bottom: 0.7rem;
  }

  .profile-section ul li::before {
    left: 0.3rem;
  }

  .highlight {
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 10px;
  }

  /* 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;
  }

  .footer-bottom {
    padding: 1.2rem 1.5rem;
  }

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

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

  .logo {
    font-size: 1rem;
  }

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

  .back-link {
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
  }

  .profile-container {
    padding: 0 1rem;
    margin: 7rem auto 1.5rem;
  }

  .profile-header {
    padding: 2rem 1rem;
    border-radius: 12px;
  }

  .profile-photo {
    width: 130px;
    height: 130px;
    font-size: 3rem;
    border-width: 3px;
    margin-bottom: 1.2rem;
  }

  .profile-header h1 {
    font-size: 1.6rem;
    margin-bottom: 0.6rem;
  }

  .profile-header .position {
    font-size: 1.05rem;
    margin-bottom: 0.8rem;
  }

  .profile-header .expertise {
    font-size: 0.95rem;
    line-height: 1.5;
  }

  .profile-section {
    padding: 1.5rem 1rem;
    margin-bottom: 1.2rem;
  }

  .profile-section h2 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
  }

  .profile-section p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 0.8rem;
  }

  .profile-section ul {
    margin: 0.8rem 0;
  }

  .profile-section ul li {
    font-size: 0.95rem;
    line-height: 1.7;
    padding-left: 1.5rem;
    margin-bottom: 0.6rem;
  }

  .profile-section ul li::before {
    left: 0.2rem;
    font-size: 0.9rem;
  }

  .highlight {
    padding: 1.2rem;
    margin: 1.2rem 0;
  }

  .footer-main {
    padding: 2rem 1rem 1rem;
  }

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

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

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

  .footer-bottom {
    padding: 1rem;
  }

  .footer-bottom p {
    font-size: 0.8rem;
  }
}