body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f7fa;
    color: #333;
}

header {
    background: #2A5C82;
    padding: 20px;
    color: white;
    text-align: center;
}

nav {
    background: #1F4661;
    padding: 10px;
    text-align: center;
}

nav a {
    color: #fff;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

.container {
    width: 90%;
    max-width: 900px;
    margin: 30px auto;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,.1);
    margin-bottom: 25px;
}

footer {
    background: #1F4661;
    color: white;
    text-align: center;
    padding: 15px 0;
    margin-top: 40px;
}