styles.css

:root {
    --grid-cols: 1;
    --grid-rows: 1;
    
  }
main{
    display:flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-around;
}
#button_c{
  display:flex;
  flex-direction: column;
  align-items: center;
  padding-bottom:20px;
}
 body{
    display:flex;
    flex-direction:column;
    align-self:center;
    justify-self: center;
    background-color: antiquewhite;
 }
  #container {
    display:flex;
    flex-wrap: wrap;
    display: grid;
    grid-gap: 0em;
    grid-template-rows: repeat(var(--grid-rows), 0fr);
    grid-template-columns: repeat(var(--grid-cols), 0fr);
    cursor: pointer;
    height: 550px;
    width:550px;
    background-color: beige;
    

  }
  #bigBorder {
    background-color: brown;
    padding: 50px;
    border-radius: 50px;

  }
  
  .grid-item {
    
    text-align: center;
  }
  #btn{
    background-color: azure;
    margin-bottom: 100px;
  }
  .slidecontainer {
    width: 100%; /* Width of the outside container */
  }
  .slider {
    -webkit-appearance: none;  /* Override default CSS styles */
    appearance: none;
    width: 100%; /* Full-width */
    height: 25px; /* Specified height */
    background: #d3d3d3; /* Grey background */
    outline: none; /* Remove outline */
    opacity: 0.7; /* Set transparency (for mouse-over effects on hover) */
    -webkit-transition: .2s; /* 0.2 seconds transition on hover */
    transition: opacity .2s;
  }
  .slider:hover {
    opacity: 1; /* Fully shown on mouse-over */
  }
  .slider::-webkit-slider-thumb {
    -webkit-appearance: none; /* Override default look */
    appearance: none;
    width: 25px; /* Set a specific slider handle width */
    height: 25px; /* Slider handle height */
    background: #04AA6D; /* Green background */
    cursor: pointer; /* Cursor on hover */
  }
  
  .slider::-moz-range-thumb {
    width: 25px; /* Set a specific slider handle width */
    height: 25px; /* Slider handle height */
    background: #04AA6D; /* Green background */
    cursor: pointer; /* Cursor on hover */
  }