table{
    
   table-layout: fixed;
    border-collapse: separate;
    width:100%;
    border-spacing: 8px;
}
body{
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #0d0d0d;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;

}

td{
   
    padding:5px;
   
}
#inputBox{
    background-color: #000;
    text-align: right;
    width:100%;
    font-size: 24px;
    color:#0ff;
    border:none;
    padding: 10px;
    height:60px;
    border-radius: 10px;
    box-shadow: inset 0 0 5px #0ff;
    margin-bottom: 15px;

}
.digitButon{
    background-color: #111;
    width: 100%;
    height: 50px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 10px;
    border:none;
    box-shadow: 0 0 10px #0ff;
    color:#0ff

}
button{
     background-color: #111;
    width: 100%;
    height: 50px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 10px;
    border:none;
    box-shadow: 0 0 10px #0ff;
    color:#0ff
}
.oprtButn{
     background-color: #111;
    width: 100%;
    height: 50px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 10px;
    border:none;
    box-shadow: 0 0 10px #0ff;
    color:#0ff
}
.ACButn{
     background-color: #111;
    width: 100%;
    height: 50px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 10px;
    border:none;
    box-shadow: 0 0 10px #0ff;
    color:#0ff
}
.calculator{
    background: #1a1a1a;
    padding:20px;
    border-radius: 15px;
    box-shadow: 0 0 20px #0ff;
    width: 100%;
    max-width: 340px;
    box-sizing: border-box;
}


footer {
  text-align: center;
  margin-top: 20px;
  color: #0ff;
  font-size: 14px;
  text-shadow: 0 0 5px #0ff, 0 0 10px #0ff, 0 0 20px #0ff;
}

footer a {
  color: #0ff;
  text-decoration: none;
  font-weight: bold;
  text-shadow: 0 0 5px #0ff, 0 0 10px #0ff, 0 0 20px #0ff;
  transition: 0.3s ease;
}

footer a:hover {
  color: #fff;
  text-shadow: 0 0 10px #0ff, 0 0 20px #0ff, 0 0 40px #0ff;
         }
@media(max-width:400px){
    .calculator{
        padding:15px;
        max-width: 280px;
    }
    .inputBox{
        font-size: 45px;
        height:45px;
    }
}