:root {
    /* dark shades of primary color*/
    --clr-primary-1: hsl(205, 86%, 17%);
    --clr-primary-2: hsl(205, 77%, 27%);
    --clr-primary-3: hsl(205, 72%, 37%);
    --clr-primary-4: hsl(205, 63%, 48%);
    /* primary/main color */
    --clr-primary-5: hsl(205, 78%, 60%);
    /* lighter shades of primary color */
    --clr-primary-6: hsl(205, 89%, 70%);
    --clr-primary-7: hsl(205, 90%, 76%);
    --clr-primary-8: hsl(205, 86%, 81%);
    --clr-primary-9: hsl(205, 90%, 88%);
    --clr-primary-10: hsl(205, 100%, 96%);
    /* darkest grey - used for headings */
    --clr-grey-1: hsl(209, 61%, 16%);
    --clr-grey-2: hsl(211, 39%, 23%);
    --clr-grey-3: hsl(209, 34%, 30%);
    --clr-grey-4: hsl(209, 28%, 39%);
    /* grey used for paragraphs */
    --clr-grey-5: hsl(210, 22%, 49%);
    --clr-grey-6: hsl(209, 23%, 60%);
    --clr-grey-7: hsl(211, 27%, 70%);
    --clr-grey-8: hsl(210, 31%, 80%);
    --clr-grey-9: hsl(212, 33%, 89%);
    --clr-grey-10: hsl(210, 36%, 96%);
    --clr-white: #fff;
    --clr-purple: #4b145b;
    --clr-red-special: #b4345c;
    --clr-grey-special: #eae6eb;
    --clr-red-dark: hsl(360, 67%, 44%);
    --clr-red-light: hsl(360, 71%, 66%);
    --clr-green-dark: hsl(125, 67%, 44%);
    --clr-green-light: hsl(125, 71%, 66%);
    --clr-black: #222;
    --transition: all 0.3s linear;
    --spacing: 0.1rem;
    --radius: 4px;
    --light-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --dark-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    --max-width: 1170px;
    --fixed-width: 920px;
  }
  
  *,
  ::after,
  ::before {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
      Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    background: var(--clr-purple);
    color: var(--clr-grey-1);
    line-height: 1.5;
    font-size: 0.875rem;
  }
  ul {
    list-style-type: none;
  }
  a {
    text-decoration: none;
  }
  h1,
  h2,
  h3,
  h4 {
    letter-spacing: var(--spacing);
    text-transform: capitalize;
    line-height: 1.25;
    margin-bottom: 0.75rem;
  }
  h1 {
    font-size: 3rem;
  }
  h2 {
    font-size: 2rem;
  }
  h3 {
    font-size: 1.25rem;
  }
  h4 {
    font-size: 0.875rem;
  }
  p {
    margin-bottom: 1.25rem;
    color: var(--clr-grey-5);
  }
  @media screen and (min-width: 800px) {
    h1 {
      font-size: 4rem;
    }
    h2 {
      font-size: 2.5rem;
    }
    h3 {
      font-size: 1.75rem;
    }
    h4 {
      font-size: 1rem;
    }
    body {
      font-size: 1rem;
    }
    h1,
    h2,
    h3,
    h4 {
      line-height: 1;
    }
  }
  /*  global classes */
  
  main {
    /* min-height: 100vh; */
    /* using flex because of better browser support */
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .container {
    width: 90vw;
    margin: 5rem auto;
    background: var(--clr-white);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    max-width: var(--fixed-width);
    display: grid;
    gap: 1rem 2rem;
  }
  .container h3 {
    line-height: 1.2;
    font-weight: 500;
  }
  @media screen and (min-width: 992px) {
    .container {
      display: grid;
      grid-template-columns: 250px 1fr;
    }
  }
  
  .section {
    width: 90vw;
    margin: 0 auto;
    max-width: var(--max-width);
  }
  
  @media screen and (min-width: 992px) {
    .section {
      width: 95vw;
    }
  }
  