/* General Styles */
body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background: #f4f4f9;
  color: #333;
  text-align: center;
  transition: background 0.4s, color 0.4s;
}

header {
  background: #1e1e2f;
  color: #fff;
  padding: 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

nav {
  margin-top: 10px;
}

nav a {
  color: #ddd;
  text-decoration: none;
  margin: 0 18px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: color 0.3s ease;
}

nav a:hover,
nav a.active {
  color: #ffcc00;
}

.toggle-btn {
  margin-top: 15px;
  padding: 10px 16px;
  background: #ffcc00;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.3s ease;
}

.toggle-btn:hover {
  background: #e6b800;
}

/* Sections */
section {
  display: none;
  padding: 60px 20px;
  animation: fadeIn 0.5s ease-in-out;
}

section.active {
  display: block;
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 20px;
}

p {
  font-size: 1.1rem;
  max-width: 750px;
  margin: 0 auto 20px;
  line-height: 1.6;
}

/* Responsive Images */
.responsive {
  width: 300px;
  height: 200px;
  object-fit: cover;
  border-radius: 12px;
  margin-top: 20px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
  transition: transform 0.3s ease;
}

.responsive:hover {
  transform: scale(1.05);
}

/* Activities Grid */
.activities-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 25px;
  margin-top: 30px;
}

.activity-card {
  background: #fff;
  padding: 20px;
  border-radius: 14px;
  box-shadow: 0px 4px 10px rgba(0,0,0,0.15);
  width: 320px;
  transition: transform 0.3s ease;
}

.activity-card:hover {
  transform: translateY(-6px);
}

.activity-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 12px;
}

/* Footer */
footer {
  margin-top: 50px;
  padding: 20px;
  background: #1e1e2f;
  color: #fff;
}

/* Dark Mode */
body.dark {
  background: #121212;
  color: #eaeaea;
}

body.dark header {
  background: #000;
}

body.dark nav a {
  color: #aaa;
}

body.dark nav a.active,
body.dark nav a:hover {
  color: #ffcc00;
}

body.dark .activity-card {
  background: #1e1e1e;
  color: #f0f0f0;
}

body.dark footer {
  background: #000;
}

/* Animation */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}