@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;900&display=swap');
@keyframes transitionIn{
    from{
        opacity:0;
        transform:translateY(-10px)
    }
to{
    opacity:1;
    transform:translateY(0)
}
}
*{
    font-family: 'Nunito', sans-serif;
    position:relative;
}
strong{
    font-weight: 900;
}
nav {
    margin: 27px auto 0;
  
    position: relative;
    width: 830px;
    height: 50px;
    background-color: #34495e;
    border-radius: 8px;
    font-size: 0;
  }
  nav a {
    line-height: 50px;
    height: 100%;
    font-size: 15px;
    display: inline-block;
    position: relative;
    z-index: 1;
    text-decoration: none;
    text-transform: uppercase;
    text-align: center;
    color: rgb(0, 0, 0);
    cursor: pointer;
  }
  nav .animation {
    position: absolute;
    height: 100%;
    top: 0;
    z-index: 0;
    transition: all .5s ease 0s;
    border-radius: 8px;
  }
  a:nth-child(1) {
    width: 100px;
  }
  a:nth-child(2) {
    width: 110px;
  }
  a:nth-child(3) {
    width: 100px;
  }
  a:nth-child(4) {
    width: 160px;
  }
  a:nth-child(5) {
    width: 120px;
  }
  a:nth-child(6) {
    width: 120px;
  }
  a:nth-child(7) {
    width: 120px;
  }
  nav .start-home, a:nth-child(1):hover~.animation {
    width: 100px;
    left: 0;
    background-color: #1abc9c;
  }
  nav .start-about, a:nth-child(2):hover~.animation {
    width: 110px;
    left: 100px;
    background-color: #e74c3c;
  }
  nav .start-dog, a:nth-child(3):hover~.animation {
    width: 100px;
    left: 210px;
    background-color: #3498db;
  }
  nav .start-success, a:nth-child(4):hover~.animation {
    width: 160px;
    left: 310px;
    background-color: #9b59b6;
  }
  nav .start-breed, a:nth-child(5):hover~.animation {
    width: 120px;
    left: 470px;
    background-color: #e67e22;
  }
  nav .start-dicsipline, a:nth-child(6):hover~.animation {
    width: 120px;
    left: 590px;
    background-color: #22e674;
  }
  nav .start-contact, a:nth-child(7):hover~.animation {
    width: 120px;
    left: 710px;
    background-color: #e622d6;
  }
  
  body {
    font-size: 12px;
    background: #ffffff;
    animation:transitionIn 0.75s;
  }
  h1 {
    text-align: center;
    margin: 40px 0 40px;
    text-align: center;
    font-size: 30px;
    color: #000000;
  }
  
  p {
      position: relative;
      width: 100%;
      text-align: center;
      color: #000000;
      font-size: 16px;
  }
  
  span {
      color: #2BD6B4;
  }
  
  img {
      width:80vw;
      display:block;
      margin:2vw auto;
      border-radius: 8px;
      position:relative;
  }
  
  article{
      display:block;
      position:relative;
  }

  main{
      top:5em;
  }