body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #0f172a;
    color: white;
    line-height: 1.6;
}

header, main, footer {
    max-width: 80%;
    margin: 20px auto;
    padding: 20px;
    background-color: #1e293b;
    border: 3px solid #000;
    border-radius: 8px;
}

/* unvisited link */
a:link {
  color: #ffffff;
}

/* visited link */
a:visited {
  color: #ffffff;
}

/* mouse over link */
a:hover {
  color: red;
}

/* selected link */
a:active {
  color: red;
}


h1 {
    text-align: center;
    color: #60a5fa;
}

h2 {
    color: #93c5fd;
    margin-top: 40px;
}

h3 {
    color: #bfdbfe;
}

p {
    margin: 10px 0;
}

ul {
    margin-left: 20px;
}

footer {
    text-align: center;
}