/* Hero Section (Updated Aviation Style) */
.hero-section {
  background: linear-gradient(to right, #003366, #00bcd4);  /* Dark blue to sky blue gradient */
  color: white;
  padding: 3em 2em;
  text-align: center;
}

.hero-section h2 {
  font-size: 2.5em;
  margin-bottom: 0.3em;
  color: #fff;  /* White text for better contrast */
}

.hero-section p {
  font-size: 1.2em;
  color: #ffcc00;  /* Bright yellow accent */
}

/* Material Selection Section */
.material-selection {
  padding: 3em 2em;
  background: #1f2b36;  /* Darker background (matches the dark theme) */
  min-height: 80vh;
  text-align: center;
}

.material-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 2em;
}

/* Material Cards */
.material-card {
  background: #2a3a50;  /* Slight steel blue card background for depth */
  border-radius: 15px;
  padding: 2em;
  width: 250px;
  text-align: center;
  text-decoration: none;
  color: #d0d0d0;  /* Soft gray text for readability */
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
  border-top: 4px solid #00bcd4;  /* Sky blue border for prominence */
  transition: all 0.3s ease;
}

.material-card:hover {
  transform: translateY(-5px);  /* Slight lift on hover for interaction */
  border-top: 4px solid #00bcd4;  /* Highlight border in bright yellow on hover #ffcc00 */
}

.material-card h3 {
  margin-top: 0;
  font-size: 1.5em;
  color: #00bcd4;  /* Sky blue for headings */
}

.material-card p {
  color: #b0b0b0;  /* Soft gray text for descriptions */
  font-size: 1em;
  line-height: 1.6em;
}