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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: #f8fafc;
  color: #1e293b;
}

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

header {
  background: #0f172a;
  color: white;
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 28px;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 20px;
  font-weight: bold;
  transition: 0.3s;
}

nav a:hover {
  color: #60a5fa;
}

.hero {
  background: linear-gradient(to right, #1d4ed8, #0f172a);
  color: white;
  text-align: center;
  padding: 120px 20px;
}

.hero h2 {
  font-size: 56px;
  margin-bottom: 20px;
}

.hero p {
  max-width: 700px;
  margin: auto;
  font-size: 20px;
  margin-bottom: 35px;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: bold;
  transition: 0.3s;
}

.primary-btn {
  background: white;
  color: #0f172a;
}

.primary-btn:hover {
  background: #e2e8f0;
}

.secondary-btn {
  border: 2px solid white;
  color: white;
}

.secondary-btn:hover {
  background: rgba(255,255,255,0.1);
}

.section {
  padding: 90px 0;
  text-align: center;
}

.section h3 {
  font-size: 40px;
  margin-bottom: 25px;
}

.section p {
  max-width: 800px;
  margin: auto;
  font-size: 18px;
}

.light-section {
  background: white;
}

.dark-section {
  background: #0f172a;
  color: white;
}

.cards {
  margin-top: 50px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.card {
  background: white;
  padding: 35px 25px;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
  transition: 0.3s;
}

.card:hover {
  transform: translateY(-8px);
}

.card h4 {
  margin-bottom: 15px;
  font-size: 24px;
}

.dark-card {
  background: #1e293b;
  color: white;
}

.give-section {
  background: linear-gradient(to right, #1d4ed8, #0f172a);
  color: white;
}

footer {
  background: #020617;
  color: white;
  text-align: center;
  padding: 25px 0;
}

@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 15px;
  }

  nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
  }

  nav a {
    margin: 10px;
  }

  .hero h2 {
    font-size: 40px;
  }

  .section h3 {
    font-size: 32px;
  }