body {
    font-family: Arial, sans-serif;
    background: #edf2f7;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

table td {
    padding: 8px;
}

input[type="text"] {
    padding: 6px;
    width: 100px;
}

input[type="button"] {
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    background-color: #4299e1;
    color: white;
    cursor: pointer;
}

input[type="button"]:hover {
    background-color: #2b6cb0;
}

.back {
    position: fixed;
    bottom: 20px;
    left: 20px;
}