body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

.project-card {
  background-color: #f1f1f1;
  padding: 20px;
  margin-bottom: 20px;
}

.sidebar {
  background-color: #4CAF50;
  padding: 20px;
  color: white;
}

footer {
  background-color: #f8f9fa;
}

@media (max-width: 600px) {
  h1 {
    font-size: 20px;
  }
  p {
    font-size: 12px;
  }
  .box {
    width: 100%;
  }
  .project-card {
    margin-bottom: 10px;
  }
  .sidebar {
    margin-top: 20px;
  }
}

@media (min-width: 601px) and (max-width: 1024px) {
  h1 {
    font-size: 28px;
  }
  p {
    font-size: 16px;
  }
  .box {
    width: 48%;
  }
  .project-card {
    padding: 15px;
  }
  .sidebar {
    padding: 15px;
  }
}

@media (min-width: 1025px) {
  h1 {
    font-size: 32px;
  }
  p {
    font-size: 18px;
  }
  .box {
    width: 30%;
  }
  .project-card {
    padding: 20px;
  }
  .sidebar {
    padding: 20px;
  }
}