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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background: #004356;
    color: #333;
    padding: 20px;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 70%;
    margin: auto;
    overflow: hidden;
}

/* Header */
header {
    position: relative;
}

#header-logo img {
    display: block;
    max-width: 100%;
    padding-bottom: 10px;
}

/* Navigation */
nav {
    background: #004356;
    width: 100%;
}

nav ul {
    list-style: none;
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
}

nav ul li a {
    color: #ffffff;
    text-decoration: none;
    padding: 10px;
}

nav ul li a:hover {
    color: grey;
}

/* Main content */
main {
    margin: 20px 0;
    padding: 20px;
    background: #fff;
    box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.1);
}

/* Footer */
footer {
    background: #004356;
    color: #fff;
    padding: 20px 0;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
}

.footer-column {
    flex: 1;
    margin-right: 10px;
}

.footer-column:last-child {
    margin-right: 0;
}

/* Responsive design */
@media (max-width: 768px) {
    .container,
    .footer-container {
        flex-direction: column;
    }

    .footer-column {
        margin-bottom: 20px;
    }

    .footer-column:last-child {
        margin-bottom: 0;
    }

    nav ul {
        flex-direction: column;
    }

    nav ul li {
        text-align: center;
    }

    nav ul li a {
        display: block;
        width: 100%;
    }
}