.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: url('img/feedback-bg.png') no-repeat center center fixed;
    background-size: cover; 
}

.content {
    position: relative;
    z-index: 1; 
}

.title-prop {
    font-family: 'REM', serif;
}

body {
    font-family: 'Arial', sans-serif;
}

nav {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

nav a {
    transition: color 0.3s;
}

nav a:hover {
    color: #1abc9c;
}

.footer a {
    transition: color 0.4s;
}

.footer a:hover {
    color: #dcdcdc;
}