* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", sans-serif;
}

body {
  background: #f5f7fa;
  color: #1f2937;
  line-height: 1.6;
}

.header {
  background-color: #1e293b;
  color: #ffffff;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
}

.contribute-btn {
  background-color: #6366f1;
  color: white;
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.contribute-btn:hover {
  background-color: #4f46e5;
  transform: scale(1.05);
}

.tracker-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  padding: 2rem 3%;
}

.card {
  background-color: #ffffff;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.07);
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.card img {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 1rem;
  border: 3px solid #e5e7eb;
}

.card h2 {
  font-size: 1.2rem;
  color: #111827;
  margin-bottom: 0.4rem;
}

.card p {
  margin: 0.3rem 0;
  font-size: 0.95rem;
  color: #4b5563;
}

.links {
  margin-top: 0.8rem;
}

.links a {
  text-decoration: none;
  color: #2563eb;
  font-weight: 500;
  margin: 0 0.5rem;
  transition: color 0.2s;
}

.links a:hover {
  color: #1d4ed8;
}

footer {
  text-align: center;
  padding: 1.5rem 2rem;
  background-color: #1e293b;
  color: #e2e8f0;
  font-size: 0.95rem;
  margin-top: 3rem;
}

@media (max-width: 600px) {
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .logo {
    font-size: 1.5rem;
  }

  .contribute-btn {
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
  }

  .card {
    padding: 1.2rem;
  }

  .card img {
    width: 80px;
    height: 80px;
  }

  .card h2 {
    font-size: 1.1rem;
  }

  .card p {
    font-size: 0.9rem;
  }

  .links a {
    font-size: 0.9rem;
    margin: 0 0.3rem;
  }

  footer {
    font-size: 0.85rem;
    padding: 1rem;
  }
}