body {
    font-family: Arial, sans-serif;
    background-color: #ffffff;
    margin: 0;
    padding: 0;
    color: #333;
}
header {
    text-align: center;
    padding: 1em;
}
header img {
    width: 100%;
    max-width: 1000px;
    height: auto;
    display: block;
    margin: 0 auto 1em auto;
}
h1 {
    color: #c00;
    margin: 0.5em 0 0 0;
}
.tagline {
    font-size: 1.2em;
    color: #555;
    margin-bottom: 1.5em;
}
.section {
    max-width: 800px;
    margin: auto;
    padding: 20px;
    line-height: 1.6;
}
.video {
    display: block;
    margin: 1em auto;
    max-width: 100%;
}
footer {
    text-align: center;
    padding: 1em;
    font-size: 0.9em;
    color: #777;
}