/*-----------------------------------*\
  #HERO
  Hero banner section - Enhanced with molecular elegance
\*-----------------------------------*/

.hero-section {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-2xl);
  min-height: 450px;
  display: flex;
  align-items: center;
  justify-content: center;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, var(--accent-weak) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, var(--accent-secondary-weak) 0%, transparent 50%),
    linear-gradient(135deg, var(--surface) 0%, var(--bg) 100%);
  z-index: -2;
  transition: var(--transition-theme);
}

/* Animated gradient pattern */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 10px,
      rgba(127, 127, 127, 0.03) 10px,
      rgba(127, 127, 127, 0.03) 11px
    );
  opacity: 0.5;
  z-index: -1;
}

/* Molecular particle effects */
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: -1;
}

.hero-particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  filter: blur(1px);
}

.hero-particle:nth-child(1) {
  left: 10%;
  top: 20%;
  animation: particle-drift 8s ease-in-out infinite;
}

.hero-particle:nth-child(2) {
  left: 30%;
  top: 60%;
  animation: particle-drift 10s ease-in-out infinite 1s;
}

.hero-particle:nth-child(3) {
  left: 60%;
  top: 30%;
  animation: particle-drift 9s ease-in-out infinite 0.5s;
}

.hero-particle:nth-child(4) {
  left: 80%;
  top: 70%;
  animation: particle-drift 11s ease-in-out infinite 1.5s;
}

.hero-particle:nth-child(5) {
  left: 50%;
  top: 50%;
  animation: particle-drift 7s ease-in-out infinite 2s;
}

.hero-content {
  text-align: center;
  padding: var(--space-2xl);
  max-width: 800px;
  z-index: 1;
  animation: slide-up 0.8s ease forwards;
}

.hero-title {
  font-family: var(--ff-display);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-lg);
  line-height: 1.1;
  position: relative;
}

/* Decorative molecular bond underline */
.hero-title::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  box-shadow: 0 0 15px var(--accent-glow);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  color: var(--text-secondary);
  font-weight: var(--fw-300);
  line-height: 1.6;
  margin-bottom: var(--space-xl);
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  font-style: italic;
  font-family: var(--ff-display-italic);
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  font-size: var(--fs-6);
  font-weight: var(--fw-500);
  text-decoration: none;
  transition: all var(--transition-1);
  border: 2px solid transparent;
  cursor: pointer;
}

.hero-btn.primary {
  background: var(--accent-gradient);
  color: var(--bg);
  box-shadow:
    0 4px 16px var(--accent-glow),
    0 0 0 2px var(--accent-weak);
}

.hero-btn.primary:hover {
  transform: translateY(-3px);
  box-shadow:
    0 6px 24px var(--accent-glow),
    0 0 0 3px var(--accent-weak),
    var(--glow-accent);
}

.hero-btn.secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.hero-btn.secondary:hover {
  background: var(--accent-weak);
  transform: translateY(-3px);
  box-shadow: var(--shadow-2), var(--glow-accent);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--muted);
  font-size: var(--fs-8);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  animation: float 2s ease-in-out infinite;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(45deg);
  margin-top: var(--space-xs);
}

/* Dark mode hero adjustments */
:root[data-theme="dark"] .hero-bg {
  background:
    radial-gradient(ellipse at 15% 40%, rgba(34, 211, 238, 0.18) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 60%, rgba(251, 191, 36, 0.12) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 0%, rgba(34, 211, 238, 0.08) 0%, transparent 60%),
    linear-gradient(160deg, #090e21 0%, #0a0e1a 100%);
}

/* Dark mode: molecular grid overlay on hero */
:root[data-theme="dark"] .hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 48, 80, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 48, 80, 0.5) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.4;
  z-index: 0;
}

/* Scanning line — like a spectrometer sweep */
:root[data-theme="dark"] .hero-particles::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--accent) 40%,
    rgba(34, 211, 238, 0.8) 50%,
    var(--accent) 60%,
    transparent 100%);
  box-shadow: 0 0 20px var(--accent-glow), 0 0 40px var(--accent-glow);
  animation: scan-line 6s ease-in-out infinite;
  opacity: 0.6;
  z-index: 2;
}

@keyframes scan-line {
  0%   { top: 5%;  opacity: 0; }
  5%   { opacity: 0.6; }
  90%  { opacity: 0.6; }
  100% { top: 95%; opacity: 0; }
}


/*-----------------------------------*\
  #HERO FORMULA — lab instrument display
\*-----------------------------------*/

.hero-formula {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  font-family: var(--ff-mono);
  font-size: var(--fs-8);
  color: var(--accent);
  opacity: 0.45;
  letter-spacing: 0.12em;
  pointer-events: none;
  text-transform: uppercase;
  transition: opacity var(--transition-1);
  animation: fade-in 1.5s ease 1s both;
}

.hero-section:hover .hero-formula {
  opacity: 0.7;
}

/*-----------------------------------*\
  #FUNDING & AFFILIATIONS
\*-----------------------------------*/

.affiliations-section {
  padding: var(--space-xl) 0;
  margin-bottom: var(--space-2xl);
}

.affiliations-title {
  font-size: var(--fs-7);
  color: var(--muted);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
  font-weight: var(--fw-500);
}

.affiliations-list {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
}

.affiliation-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: var(--fs-6);
  font-weight: var(--fw-400);
  transition: var(--transition-1);
  opacity: 0.7;
}

.affiliation-item:hover {
  opacity: 1;
  color: var(--accent);
  transform: translateY(-2px);
}

.affiliation-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  object-fit: contain;
  filter: grayscale(1);
  transition: var(--transition-1);
}

.affiliation-item:hover .affiliation-logo {
  filter: grayscale(0);
}

/*-----------------------------------*\
  #RESEARCH GALLERY
\*-----------------------------------*/

.research-gallery {
  margin-bottom: var(--space-2xl);
}

.gallery-title {
  margin-bottom: var(--space-lg);
  text-align: center;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all var(--transition-1);
  cursor: pointer;
}

.gallery-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-3), var(--glow-accent);
  border-color: var(--accent);
}

.gallery-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--bg-gradient-onyx);
  transition: var(--transition-1);
}

.gallery-item:hover .gallery-image {
  transform: scale(1.05);
}

.gallery-content {
  padding: var(--space-lg);
}

.gallery-item-title {
  font-size: var(--fs-5);
  font-weight: var(--fw-600);
  color: var(--text);
  margin-bottom: var(--space-xs);
}

.gallery-item-text {
  font-size: var(--fs-7);
  color: var(--text-secondary);
  line-height: 1.6;
}

/*-----------------------------------*\
  #LAND ACKNOWLEDGMENT
\*-----------------------------------*/

.land-acknowledgment {
  margin-top: var(--space-2xl);
  padding: var(--space-xl);
  background: linear-gradient(135deg, var(--surface) 0%, var(--elevated) 100%);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--accent-secondary);
  text-align: center;
}

.land-acknowledgment-title {
  font-size: var(--fs-6);
  font-weight: var(--fw-600);
  color: var(--text);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.land-acknowledgment-text {
  font-size: var(--fs-7);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 700px;
  margin: 0 auto;
}