body {
  background-color: #ffffff;
  font-family: 'Public Sans', sans-serif;
  color: #333;
  margin: 0;
}

html, body {
  height: 100%;
}

/* Branding Section */
.branding-header {
  background-color: #fff;
  text-align: center;
}

.aggx-title {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #222;
  margin-bottom: 0.25rem;
}

.aggx-subtitle {
  font-size: 1.2rem;
  font-weight: 500;
  color: #666;
}

/* Typography */
h2 {
  font-size: 2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.25rem;
}

h3 {
  text-transform: uppercase;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: #444;
  margin-bottom: 1.25rem;
}

/* Icon Cards */
.icon-card {
  background-color: #f8f9fa;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  transition: all 0.2s ease-in-out;
  height: 100%;
  cursor: pointer;
  padding: 1rem;
  text-align: center;
}

.icon-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.selectable-icon.selected {
  border: 2px solid #007bff;
  box-shadow: 0 0 0 4px rgba(0,123,255,0.15);
}

.icon-img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  transition: opacity 0.3s ease;
  display: block;
  margin: 0 auto 0.5rem auto;
}

small.text-muted {
  font-size: 0.85rem;
}

/* Explainer */
#explainer p {
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
  color: #333;
}

#explainer .btn {
  font-size: 1rem;
  padding: 0.65rem 1.5rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#explainer-media img,
#explainer-media video {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: none !important;
}

/* Relevance */
.relevance-label {
  font-weight: 600;
  margin-right: 0.25rem;
}

.relevance-group {
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  display: inline-block;
  margin-top: -2px;
  margin-left: 6px;
  background-color: rgba(0,0,0,0.05);
}

/* Department Color Themes */
.URANIUM .relevance-group   { background-color: #e6f7ec; color: #259f6c; }
.MAGNESIUM .relevance-group { background-color: #eaf1ff; color: #1d4ed8; }
.ALUMINUM .relevance-group  { background-color: #e0f2f1; color: #008080; }
.IRIDIUM .relevance-group   { background-color: #e0e0e0; color: #222; }
.DAMASCUS .relevance-group  { background-color: #dce3e6; color: #2a3439; }
.BRONZE .relevance-group    { background-color: #fff2e6; color: #b36b00; }

/* Animation */
.fade-in {
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* Footer */
footer {
  font-size: 0.85rem;
  color: #777;
  background-color: #f8f9fa;
  margin-top: auto;
}