body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(to bottom right, #f3f4f6, #ffffff, #e5e7eb);
  color: #1f2937;
}
header {
  background: rgba(255,255,255,0.9);
  border-bottom: 1px solid #e5e7eb;
  padding: 1rem 0;
}
.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}
.header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.branding {
  display: flex;
  align-items: center;
}
.branding img {
  height: 40px;
  margin-right: 10px;
}
nav a {
  margin-left: 20px;
  color: #374151;
  text-decoration: none;
}
nav a:hover {
  color: #111827;
}
.hero {
  text-align: center;
  padding: 100px 20px;
  background: rgba(255,255,255,0.8);
}
#about, #activities, #contact {
  background: rgba(255,255,255,0.9);
  padding: 80px 20px;
}
.cards {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}
@media(min-width: 768px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}
.card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}
.contact {
  text-align: center;
}
.contact-button {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  background-color: #1f2937;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}
.contact-button:hover {
  background-color: #111827;
}
footer {
  text-align: center;
  padding: 20px;
  background: #f9fafb;
  font-size: 0.875rem;
  color: #6b7280;
}