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

body {
    background-color: #f3f3f3;
    color: #333333;
    line-height: 1.6;
}

header {
    background-color: #222222;
    padding: 20px 0;
}

h1.logo {
    font-family: 'Impact', sans-serif;
    font-size: 30px;
    margin-left: 40px;
    text-transform: uppercase;
    color: #ffffff;
}

main {
    max-width: 1200px;
    margin: 40px auto;
    padding: 20px;
}

.intro {
    margin-bottom: 20px;
}

.signup {
    margin-bottom: 40px;
}

h2 {
    font-size: 24px;
    margin-bottom: 10px;
    padding-top: 10px;
    text-align: center;
}

form.subscribe-form {
    display: flex;
    margin-bottom: 20px;
}

input[type="email"] {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #cccccc;
    border-radius: 4px 0 0 4px;
}

button[type="submit"] {
    padding: 10px 20px;
    background-color: #333333;
    color: #ffffff;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    font-size: 16px;
}

button[type="submit"]:hover {
    background-color: #555555;
}

.description p {
    margin-bottom: 20px;
}

@media screen and (max-width: 768px) {
    header {
        text-align: center;
    }
    h1.logo {
        margin-left: 0;
    }
    main {
        padding: 20px;
    }
    form.subscribe-form {
        flex-direction: column;
    }
    input[type="email"] {
        border-radius: 4px 4px 0 0;
    }
    button[type="submit"] {
        border-radius: 0 0 4px 4px;
    }
}

section.video {
    padding-bottom: 30px;
}

footer {
    text-align: center;
}