/* ===== HEADER & NAVIGATION ===== */
header {
  background: linear-gradient(
      to bottom,
      var(--background),
      99%,
      transparent);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  width: 100%;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  position: relative;
}

/* ===== LOGO STYLING ===== */
.logo-container {
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: transform var(--transition-normal);
  margin: var(--spacing-md);
  position: relative;
  z-index: 2;
}

.logo-container:hover {
  transform: scale(1.05);
}

.logo-border {
  display: flex;
  gap: var(--spacing-sm);
  border: 2px solid var(--primary);
  border-radius: 0;
  padding: var(--spacing-sm) var(--spacing-sm);
  position: relative;
  margin-bottom: -16px;
  align-items: center;
}

.logo {
  height: 98px; /* Much larger logo */
  width: auto;
  transition: transform var(--transition-normal);
  position: absolute;
  bottom: -25px; /* Logo extends further below border */
  left: -5px;
  z-index: 2;
}

.logo-text {
  font-size: var(--font-size-large);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-left: 50px;
  margin-top: var(--spacing-sm);
  align-self: center; /* Fixed alignment */
}

/* Hero logo in about section */
.hero-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.hero-logo-image {
  max-width: 300px;
  height: auto;
  display: block;
}

.hero-logo-text {
  font-size: var(--font-size-h1);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin: 0;
}

/* About section styling */
.about-hero {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.about-title {
  font-size: var(--font-size-h1);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
  letter-spacing: 1px;
}

.lab-members-image {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 25px var(--shadow);
}

.members-photo {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-normal);
}

.members-photo:hover {
  transform: scale(1.02);
}

/* Desktop Navigation - Moved to the right */
.desktop-nav {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  margin: 0;
  padding: 0;
  position: absolute;
  right: 0;
  transform: none;
  white-space: nowrap;
}

.desktop-nav a {
  position: relative;
  font-weight: 500;
  font-size: var(--font-size-large);
  color: var(--text-primary);
  transition: color var(--transition-normal);
  padding: var(--spacing-sm) 0;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-normal);
}

.desktop-nav a:hover,
.desktop-nav a.active {
  color: var(--primary);
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after {
  width: 100%;
}

/* Mobile Navigation */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  z-index: 1001;
  position: relative;
  margin-left: auto;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: var(--transition-normal);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 999;
  display: none;
}

.mobile-menu-overlay.active {
  display: block;
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--background);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu ul {
  flex-direction: column;
  gap: var(--spacing-xl);
  text-align: center;
  list-style: none;
}

.mobile-menu a {
  font-size: var(--font-size-h3);
  font-weight: 600;
  color: var(--text-primary);
}

.mobile-menu-close {
  position: absolute;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  font-size: 30px;
  cursor: pointer;
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
}

/* ===== MAIN CONTENT ===== */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  overflow-x: hidden;
}

main > section {
  max-width: var(--max-width);
  margin: var(--spacing-xxl) auto;
  padding: 0 var(--spacing-lg);
  display: none;
  animation: fadeIn 0.4s ease-in-out;
  min-height: 60vh;
  width: 100%;
  box-sizing: border-box;
}

main > section.active {
  display: block;
}

/* Add consistent left margin to all sections */
#about, #research, #publications, #join {
  padding-left: 80px; /* Same as people section */
}

/* Ensure no other display rules interfere */
#research, #people, #publications, #join {
  display: none;
}

#research.active, #people.active, #publications.active, #join.active {
  display: block;
}

/* Consistent content styling */
#publications h1, #join h1 {
  margin-bottom: var(--spacing-xl);
}

#publications .news-list {
  margin-top: var(--spacing-lg);
}

#join p {
  margin-bottom: var(--spacing-lg);
}

/* Ensure consistent spacing */
.news-list {
  margin-top: var(--spacing-lg);
  width: 100%;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== FOOTER ===== */
footer {
  background: var(--background);
  color: var(--text-secondary);
  padding: var(--spacing-lg) var(--spacing-lg);
  margin-top: auto;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-text {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  line-height: 1;
}

.footer-text p {
  margin: 0;
  display: flex;
  align-items: center;
}

.runi-logo-footer {
  height: 32px;
  width: auto;
  opacity: 0.8;
  transition: opacity var(--transition-normal);
  display: block;
  flex-shrink: 0;
}

.runi-logo-footer:hover {
  opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  nav {
    padding: 0 var(--spacing-md);
  }
  
  footer {
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .footer-text {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .runi-logo-footer {
    height: 28px;
  }

  main > section {
    margin: var(--spacing-xl) auto;
    padding: 0 var(--spacing-md);
    min-height: 50vh;
  }
  
  /* Remove extra padding on mobile */
  #about, #research, #publications, #join {
    padding-left: 0;
  }
}

@media (max-width: 480px) {
  main > section {
    margin: var(--spacing-lg) auto;
    padding: 0 var(--spacing-sm);
    min-height: 40vh;
  }
  
  .logo {
    height: 60px;
    bottom: -12px;
    left: var(--spacing-xs);
  }
  
  .logo-text {
    font-size: var(--font-size-small);
    margin-left: 50px;
  }
  
  .logo-border {
    padding: var(--spacing-xs) var(--spacing-sm);
    margin-bottom: 12px;
  }
  
  .runi-logo-footer {
    height: 24px;
  }
}