body {
            
            background-color: #00b33c;
            color:white;
          }
          
          a {
            color: rgb(191, 255, 0);
              }
              
          h1 {
          color: #ffffff;
          background-color: #006600;
          font-family: Monospace;
          font-size: 35px;
          font-weight: bold;
          text-transform: uppercase;
          }
          
          h2 {
          color: #99ffbb;
          border-style: solid;
          border-top-width: 0px;
          border-left-width: 0px;
          border-right-width: 0px;
          border-bottom-width: 3px;
          border-color: #99ffbb;
                }
                
          h3 {
          color: #80ff80
               }
          h4 {
          margin-right: 20px;
          padding: 40px;
          }
          h5 {
            
          }
          h6 {
          margin: 20px;
          padding: 40px;
          }
          td {
          color: white;
                }
                
                
    .menu {
    display: flex;
    justify-content: space-between; /* rozkłada elementy */
        background-color: green;
    padding: 20px;
}

    .menu a {
    color: white;
    text-decoration: none;
    font-family: Monospace;
    font-size: 35px;
    font-weight: bold;
    text-transform: uppercase;
    }
                
    div {
      display: flex;
      justify-content: center;
    }
    siku {
      color: red;
      display: flex;
      justify-content: center;
    }
    centruj {
      display:flex;
      justify-content: center;
    }
     sb {
       display:flex;
       justify-content: space-between;
     }           
                
      se {
        display: flex;
        justify-content: space-evenly;
      }
      ai {
        display: flex;
        align-items: center;
        justify-content: center;
      }
      
      .spin-slow {
  animation-name: spin;
  animation-duration: 5s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  width:150px;
}
      .spin-fast {
  animation-name: spin;
  animation-duration: 10s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
      }

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}