style.css

body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
}

header {
    background-color: #009688;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav li {
    display: inline;
    margin: 0 10px;
}

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

main {
    max-width: 800px;
    margin: 20px auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

article {
    margin-bottom: 20px;
}

article h2 {
    color: #009688;
    font-size: 20px;
}

article p {
    margin: 10px 0;
}

aside {
    float: right;
    width: 30%;
    background-color: #f0f0f0;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

aside h2 {
    color: #009688;
    font-size: 18px;
}

aside ul {
    list-style: none;
    padding: 0;
}

aside li {
    margin-bottom: 10px;
}

footer {
    clear: both;
    text-align: center;
    background-color: #009688;
    color: #fff;
    padding: 10px 0;
}
.button {
  border: black;
  color: white;
  padding: 16px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  transition-duration: 0.4s;
  cursor: pointer;
}
.button:hover {
  border: black;
  color: white;
  padding: 16px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  transition-duration: 0.4s;
  cursor: pointer;
}