body {
   font-family: Arial, sans-serif;
   background-color: #f2f2f2;
   margin: 0;
   display: flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
}
h2 {
   text-align: center;
   margin-bottom: 20px;
}
form,
.table-container {
   background-color: rgb(255, 255, 255);
   width: 500px;
   padding: 20px;
   border-radius: 8px;
   box-shadow: 0 0 10px rgba(0,0,0,0.1);
   text-align: center;
}
label {
   font-weight: bold;
   display: block;
   text-align: left;
}
input {
   width: 90%;
   padding: 8px;
   margin-top: 5px;
   margin-bottom: 15px;
   border: 1px solid #999;
   border-radius: 4px;
}
button {
   width: 100%;
   padding: 10px;
   background-color: #1a1a1a;
   color: white;
   border: none;
   border-radius: 4px;
   cursor: pointer;
   font-size: 16px;
}
button:hover {
   background-color: #464646;
}
.result-row {
   padding: 5px 0;
   border-bottom: 1px solid #eee;
   font-size: 18px;
}