/* Basic layout and colors */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f4f6f8;
    color: #333;
}

header {
    background-color: #002f4b;
    color: #fff;
    padding: 50px 20px;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 3em;
}

header p {
    font-size: 1.2em;
}

nav {
    background-color: #004466;
    display: flex;
    justify-content: center;
    position: sticky;
    top: 0;
    z-index: 20;
}

nav a {
    color: #fff;
    text-decoration: none;
    padding: 15px 25px;
    display: inline-block;
}

nav a:hover {
    background-color: #006699;
}

main {
    padding: 20px;
}

section {
    max-width: 1000px;
    margin: 40px auto;
    padding: 30px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.06);
}

h2 {
    color: #002f4b;
}

ul {
    text-align: left;
    list-style: none;
    padding-left: 0;
}

ul li {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
}

ul li img {
    vertical-align: middle;
    margin-right: 12px;
    border: 2px solid #002f4b;
    border-radius: 5px;
}

.portfolio-list li div {
    max-width: 850px;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #002f4b;
    color: #fff;
}

.button {
    background-color: #ff6600;
    color: #fff;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
}

.button:hover {
    background-color: #e65c00;
}

/* Responsive tweaks */
@media (max-width: 600px) {
    header h1 { font-size: 2em; }
    nav { flex-wrap: wrap; }
    .button { width: 100%; }
    ul li { flex-direction: column; align-items: flex-start; }
    ul li img { margin-bottom: 10px; }
}