* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #f5f7fa;
    color: #333;
}

header {
    background-color: #4CAF50;
    color: #fff;
    padding: 1em;
    text-align: center;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2em;
}

.cta, .about-us {
    text-align: center;
    max-width: 800px;
    margin: 2em 0;
    padding: 1em;
    border-radius: 8px;
    background-color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.cta h2, .about-us h2 {
    font-size: 1.8em;
    color: #4CAF50;
    margin-bottom: 1em;
}

.cta p, .about-us p {
    font-size: 1.1em;
    color: #555;
    margin: 1em 0;
}

.about-us h3 {
    color: #007BFF;
    font-size: 1.4em;
    margin-top: 1em;
}

.about-us ul {
    list-style-type: disc;
    padding-left: 1.5em;
    text-align: left;
    margin-top: 0.5em;
}

.about-us ul li {
    margin: 0.5em 0;
    color: #333;
}

.btn {
    display: inline-block;
    padding: 0.7em 1.5em;
    color: #fff;
    background-color: #007BFF;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1em;
    margin-top: 1em;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1em;
    font-size: 0.9em;
}