:root {
    --clr-Primary-Cyan: hsl(179, 62%, 43%);
    --clr-Primary-Cyan2: hsl(178, 48%, 55%);
    --clr-Primary-BrightYellow: hsl(71, 73%, 54%);
    --clr-Primary-White: hsl(0, 0%, 100%);

    --clr-Neutral-LightGray: hsl(204, 43%, 93%);
    --clr-Neutral-GrayishBlue: hsl(218, 22%, 67%);

    --ff-primary: "Karla", sans-serif;
    
    --fw--primary: 700;
    --fw--secondary: 400;
  }


  *, *::before, *::after { box-sizing: border-box; }
  * { margin: 0; } 
  
  
  body {
    background-color: var(--clr-Neutral-LightGray); 
    font-family: var(--ff-primary);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    display: flex; 
    justify-content: center;
    align-items: center;
    padding: 2rem; 
    position: relative;
  }

  .container {
    display: grid;
    justify-self: center;
    grid-template-columns: 20rem 20rem;
    grid-template-rows: 14.5rem 17rem;
    font-weight: var(--fw--secondary);
    color: var(--clr-Primary-White);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 1rem 1rem 0 rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
  }

  /* item 1 */
  .item-1 {
    grid-column: 1 / 3; 
    grid-row: 1 / 2;

    background-color: var(--clr-Primary-White);
    padding: 2.5rem;
  }
  .title-11 {
    color: var(--clr-Primary-Cyan);
  }
  .title-12 {
    color: var(--clr-Primary-BrightYellow);
    margin-top: 1.3rem;
    margin-bottom: 1rem;
  }
  .info-1 {
    color: var(--clr-Neutral-GrayishBlue);
    line-height: 1.8rem;
  }

  /* item 2 */
  .item-2 {
    grid-row: 2 / 3; 
    grid-column: 1 / 2;

    background-color: var(--clr-Primary-Cyan);
    padding: 2.5rem;
  }
  .title-2 {
    font-weight: 500;
  }
  .flex-group {
    display: flex;
    align-items: center;
    padding-top: 0.5rem;
  }
  .period-of-time {
    font-weight: 100;
    padding-left: 1rem;
    opacity: 90%;
  }
  .sign-up-butn {
    width: 100%;
    height: 3rem;
    margin-top: 2rem;
    border: none;
    border-radius: 0.3rem;
    color: var(--clr-Primary-White);
    background-color: var(--clr-Primary-BrightYellow);
    font-weight: var(--fw--primary);
    font-family: var(--ff-primary);
    box-shadow: 0 1rem 1rem 0 rgba(0, 0, 0, 0.1);
    cursor: pointer;
  }


  /* item 3 */
  .item-3 {
    grid-row: 2 / 3; 
    grid-column: 2 / 3;

    background-color: var(--clr-Primary-Cyan2);
    padding: 2.5rem;
  }
  .title-3 {
    font-weight: 500;
  }
  .info-3 {
    line-height: 1.3rem;
    font-weight: 300;
    font-size: 0.9rem;
    padding-top: 1rem;
    opacity: 97%;
  }

  footer {
    bottom: 0;
    position: absolute;
  }

  @media (max-width: 45rem) { 
    .container { 
      grid-template-columns: 1fr; 
      grid-template-rows: auto auto auto; 
      width: 23.5rem; 
    } 
    .item-1 { grid-column: 1 / 2; grid-row: 1 / 2; padding: 2rem; } 

    .item-2 { grid-column: 1 / 2; grid-row: 2 / 3; padding: 2rem; } 

    .item-3 { grid-column: 1 / 2; grid-row: 3 / 4; padding: 2rem; } 
  }