body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
 }
 
 .container {
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
 }
 
 .header {
    background-color: #34495e;
    color: #fff;
    height: 100px;
    text-align: center;
    padding-top: 20px;
    margin-bottom: 20px;
 }
 
 .header h1 {
    margin: 0;
 }
 
 .navigation {
    background-color: #2980b9;
    color: #fff;
    padding: 10px 0;
    text-align: center;
 }
 
 .navigation ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
 }
 
 .navigation ul li {
    display: inline;
    margin: 0 10px;
 }
 
 .navigation ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
 }
 
 .navigation ul li a:hover {
    color: #ecf0f1;
 }
 
 .content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 20px;
 }
 
 .column {
    background-color: #ecf0f1;
    margin: 10px;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    text-align: center;
 }
 
 .column h2 {
    color: #34495e;
    margin-top: 0;
 }
 
 .column p {
    color: #555;
    margin-top: 0;
 }
 
 .column .social-links {
    margin-top: 20px;
 }
 
 .column .social-links li {
    display: inline-block;
    margin-right: 10px;
 }
 
 .column .social-links li:last-child {
    margin-right: 0;
 }
 
 .column .social-links li a {
    display: inline-block;
    color: #2980b9;
    text-decoration: none;
    transition: color 0.3s;
 }
 
 .column .social-links li a:hover {
    color: #e74c3c;
 }
 
 .footer {
    background-color: #34495e;
    color: #fff;
    height: 100px;
    text-align: center;
    padding-top: 20px;
 }
 
 .subheader {
    background-color: #ecf0f1;
    padding: 20px;
    border-radius: 5px;
    text-align: center;
 }
 
 .subheader h2 {
    color: #34495e;
    margin-top: 0;
 }
 
 .subheader ul {
    list-style-type: none;
    padding: 0;
    margin-top: 10px;
 }
 
 .subheader ul li {
    display: inline-block;
    margin-right: 10px;
 }
 
 .subheader ul li:last-child {
    margin-right: 0;
 }
 
 .subheader ul li a {
    color: #2980b9;
    text-decoration: none;
    transition: color 0.3s;
 }
 
 .subheader ul li a:hover {
    color: #e74c3c;
 }