body {
    font-family: Arial, sans-serif;
    background: url('background.jpg') no-repeat center center fixed;
    background-size: cover;
    color: #fff;
    margin: 0;
    padding: 0;
}

header {
        align-items: center;
    justify-content: space-between;
    background: #001f3f;
    padding: 10px 20px;
}

.card{
width: 440px;
}

.card1, .card2, .card3{
width: 100%;

}

.container{
display: flex;
}

.container div{
padding-left: 5px;
}

.logo {
    height: 50px;
    padding-right:10px;
    float: left;
align-items: center;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    gap: 10px;
}

nav a {
    color: #001f3f;
    text-decoration: none;
}

footer {
    background: #000;
    text-align: center;
    padding: 10px;
}