:root {
  --primary: #0066ff;
  --dark: #0e0e0e;
  --light: #f1f1f1;
  --accent: #ff6500;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background: #fffred;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

header {
  background: var(--light);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6rem 0;
}

h1 {
  font-size: 1.75rem;
  color: var(--primary);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  color: var(--dark);
  font-weight: 500;
  position: relative;
}

nav a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  background: var(--primary);
  left: 0;
  bottom: -3px;
  transition: width 0.3s;
}

nav a:hover::after {
  width: 100%;
}

.hamburger {
  display: none;
  font-size: 1.5rem;
  background: none;
  border: none;
}

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  text-align: center;
  padding: 6rem 0;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: white;
  border-radius: 5px;
  text-decoration: none;
  margin-top: 1rem;
  transition: background 0.3s;
}

.btn:hover {
  background: #e15b00;
}

.about,
.contact {
  padding: 4rem 0;
  background: var(--light);
}

.activities {
  padding: 4rem 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: white;
  padding: 2rem 1.5rem;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.07);
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.card h3 {
  margin-bottom: 0.75rem;
  color: var(--primary);
}

.input-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  margin-bottom: 0.25rem;
}

input,
textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
}

footer {
  background: var(--dark);
  color: white;
  text-align: center;
  padding: 1rem 0;
}

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    background: var(--light);
    position: absolute;
    top: 100%;
    right: 0;
    width: 200px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  nav ul.open {
    transform: translateX(0);
  }
  .hamburger {
    display: block;
    cursor: pointer;
  }
}