body {
    font-family: 'Poppins', Arial, sans-serif;
    font-size: 15px;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #f0f4f8;
    min-height: 100vh;
  }

  main {
    align-items: center;
    text-align: center;
    padding: 20px;
    display: flex;
    flex-direction: column; 
  }

.container-grid {
    display: grid;
    grid-template-rows: repeat(4, auto); /* Stack cards vertically on small screens */
    grid-template-columns: 1fr;
    gap: 20px;
    max-width: 375px;
    margin: 0 auto;
    padding: 20px;
  } 
  
  .header > :first-child  {
    font-size: 2rem;
    font-weight:lighter;
    color: hsl(212, 6%, 44%);
    margin: 0;
    padding: 0;
  }
  
  .header > h1{
    font-size: 2rem;
    font-weight: bold;
    color: hsl(234, 12%, 34%);
    margin: 0;
    padding: 0;
  }
  .header > :last-child  {
    color: hsl(212, 6%, 44%);
    font-size: 0.8rem;
  }
  .card {
    background-color: #ffffff;
    border-radius: 8px; 
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: start;
    justify-content:center;
    text-align:left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
  }
  .card img {
    margin-top: 10px;
    width: 50px;
    height: 50px;
    align-self: self-end;
  }
    .card h2 {
        font-size: 1rem;
        color: hsl(212, 6%, 44%);
        margin: 0;
        padding: 0;
    }
    .card p {
        font-size: 1rem;
        color: hsl(212, 6%, 44%);
        padding: 0; 
    }
    .supervisor {
        align-self: center;
        border-top: 6px solid  hsl(180, 62%, 55%);
        padding-bottom: 40px;
      }
      
      .team-builder {
        border-top: 6px solid hsl(0, 78%, 62%);
        padding-bottom: 40px;
      }
      .karma {
        border-top: 6px solid hsl(34, 97%, 64%);
        padding-bottom: 40px;
      }
      
      .calculator {
        align-self: center;
        border-top: 6px solid hsl(212, 86%, 64%);
        padding-bottom: 40px;
      }
    @media (min-width: 768px) {
        .container-grid{
            display: grid;
            grid-template-rows: repeat(3, 1fr);
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            max-width: 1200px;
            padding: 20px;
        
          }
          .header {
            grid-column: 1 / 4;
            grid-row: 1 / 2;
            display: flex;
            flex-direction: column; 
            align-items: center;
            justify-content: center;
          }
    
          .header > :last-child  {
            width: 40%;
          }
  .supervisor {
    grid-column: 1 / 2;
    grid-row: 2 / 4;
    align-self: center;
    border-top: 6px solid  hsl(180, 62%, 55%);
  }
  
  .team-builder {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
    border-top: 6px solid hsl(0, 78%, 62%);
  }
  .karma {
    grid-column: 2 / 3;
    grid-row: 3 / 4;
    border-top: 6px solid hsl(34, 97%, 64%);
  }
  
  .calculator {
    grid-column: 3 / 4;
    grid-row: 2 / 4;
    align-self: center;
    border-top: 6px solid hsl(212, 86%, 64%);
  }
}

  footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.8rem;
  }
  
  footer a {
    color: #0078d4;
    text-decoration: none;
  }
  
  footer a:hover {
    text-decoration: underline;
  }