body {
    font-family: 'Open Sans', sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    color: #333;
}

.hidden-element {
    display: none;
}

.container {
    max-width: 90%;
    margin: 0 auto;
    padding: 20px;
}

/* Modern Input Styles */
input[type="number"],
input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 16px;
    margin-bottom: 15px;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

input[type="button"] {
    background-color: #4CAF50;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}