/* Base Styles for Mobile First */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f7f6;
}

.container {
  width: 100%;
  max-width: 100%;
  padding: 20px;
}

.header {
  background-color: #003366;
  color: white;
  padding: 20px;
  text-align: center;
}

.card {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  margin: 10px 0;
  padding: 15px;
  text-align: center;
}

.card h3 {
  margin: 0;
  font-size: 24px;
}

.card p {
  font-size: 18px;
  margin-top: 5px;
}

/* Grid layout for small screens (mobile) */
.grid-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.grid-item {
  padding: 10px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

button {
  padding: 10px 15px;
  background-color: #0055ff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #003366;
}

/* Media Queries for Larger Screens (Desktop) */
@media only screen and (min-width: 768px) {
  .grid-container {
    grid-template-columns: 1fr 1fr;
  }

  .header {
    font-size: 28px;
  }

  .card {
    margin: 20px;
  }

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

  .card p {
    font-size: 20px;
  }
}

@media only screen and (min-width: 1024px) {
  .grid-container {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .card {
    margin: 20px;
    padding: 20px;
  }

  .card h3 {
    font-size: 36px;
  }

  .card p {
    font-size: 22px;
  }
}