body {
    background-image: url("images/texture.png");
    background-repeat: repeat;
    font-family: Arial, Helvetica, sans-serif;
}
.content {
    width: 500px;
    height: 200px;

    position: absolute;
    top:0;
    bottom: 0;
    left: 0;
    right: 0;

    margin: auto;
}

.button
{
    display: inline-block;
    width: 400px;
    padding: 8px 0px;
    font-size: 1.0em;
    color: #fff;
    background-color: #191919;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 1px;
    transition: background 0.2s, box-shadow 0.2s;
}

.manual-section {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
}

.manual-box {
    display: flex;
    align-items: center;
    background: #fff;
    border: 2px solid #ccc;
    border-radius: 18px;
    padding: 18px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    width: 100%;
}

.manual-box img {
    height: 128px;
    margin-right: 24px;
    border: 2px solid #191919;
    border-radius: 12px;
}