* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: url(../img/bg.jpg) center center no-repeat;
    background-size: cover;
    min-height: 100vh;
    padding: 20px;
}

.wrapper {
    max-width: 840px;
    margin: 50px auto;
}

.content-wrap {
    background: rgba(255,255,255,0.95);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 30px rgba(0,0,0,0.3);
}

.header img {
    width: 100%;
    height: auto;
    display: block;
}

@media (max-width: 768px) {
    .wrapper {
        margin: 20px auto;
    }
    .content-wrap {
        padding: 15px;
    }
}