body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
    padding: 0;
}
.container {
    width: 90%;
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background-color: #ffffff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}
h1 {
    text-align: center;
    color: #333;
    font-size: 2em;
    margin-bottom: 20px;
}
h3 {
    text-align: center;
    color: #666;
    margin-bottom: 20px;
}
label {
    font-size: 1.1em;
    display: block;
    margin-bottom: 8px;
}
select {
    width: 100%;
    padding: 10px;
    font-size: 1.1em;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 20px;
}
select:focus {
    border-color: #4CAF50;
}
.pinout-container {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}
.column {
    width: 45%;
    padding: 15px;
    background-color: #fafafa;
    border-radius: 8px;
}
.column h3 {
    text-align: center;
    font-size: 1.2em;
}
.pin {
    font-size: 1.1em;
    margin: 8px 0;
    padding: 8px;
    background-color: #e3f2fd;
    border-radius: 4px;
}
.pin:nth-child(odd) {
    background-color: #f1f8e9;
}
.pin:even {
    background-color: #fff3e0;
}
.footer {
    text-align: center;
    margin-top: 20px;
    color: #666;
    font-size: 15px;
}
button {
    background-color: #007BFF;
    color: white;
    font-size: 16px;
    border: none;
    border-radius: 6px;
    padding: 10px 15px;
    cursor: pointer;
    transition: background-color 0.3s ease-in-out;
    margin-top: 10px;
    text-align: center;
}

button:hover {
    background-color: #0056b3;
}
.header {
text-align: center;
}
@media (max-width: 768px) {
    .pinout-container {
        flex-direction: column;
    }
    .column {
        width: 100%;
        margin-bottom: 20px;
    }
}