When I hover on one element other elements are also moving from their position which is odd,can someone tell how to rectify it
<div class="frame">
<div class="center">
<div id="boxes">
<div><strong>15</strong> monday</div>
<div><strong>16</strong> tuesday</div>
<div><strong>17</strong> wednesday</div>
<div><strong>18</strong> thursday</div>
</div>
</div>
</div>
// delete the following line if no text is used
// edit the line if you wanna use other fonts
@import url(https://fonts.googleapis.com/css?family=Open+Sans:700,300);
// use only the available space inside the 400x400 frame
.frame {
position: absolute;
top: 50%;
left: 50%;
width: 400px;
height: 400px;
margin-top: -200px;
margin-left: -200px;
border-radius: 2px;
box-shadow: 4px 8px 16px 0 rgba(0,0,0,0.1);
overflow: hidden;
background: #48C9B0 ;
color: #333;
font-family: 'Open Sans', Helvetica, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
.center {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
}
#boxes{
display:grid;
display:relative;
grid-gap:20px;
justify-items:center;
grid-template-columns:1fr 1fr;
}
#boxes div:nth-child(1){
text-transform:capitalize;
font-size:30px;
padding:10px 20px;
transition:0.4s;
text-align:center;
width:50%;
}
#boxes div:hover:nth-child(1){
border:3px solid;
box-shadow:inset 0 0 2px 2px;
cursor:pointer;
}
#boxes div:nth-child(2){
text-transform:capitalize;
font-size:30px;
transition:0.4s;
padding:10px 20px;
text-align:center;
}
#boxes div:hover:nth-child(2){
border:3px solid;
cursor:pointer;
box-shadow:inset 0 0 2px 2px;
}
#boxes div:nth-child(3){
text-transform:capitalize;
font-size:30px;
transition:0.4s;
padding:10px 20px;
text-align:center;
}
#boxes div:hover:nth-child(3){
border:3px solid;
cursor:pointer;
box-shadow:inset 0 0 2px 2px;
}
#boxes div:nth-child(4){
text-transform:capitalize;
font-size:30px;
transition:0.4s;
padding:10px 20px;
text-align:center;
}
#boxes div:hover:nth-child(4){
border:3px solid;
cursor:pointer;
box-shadow:inset 0 0 2px 2px;
}