/* element selector */
body {
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  text-align: center;
  margin: 30px;
}

/* id selector */
#main-title {
  color: #2c3e50;
}

/* class selector */
.subtitle {
  color: #16a085;
  font-style: italic;
}

img {
  border: 2px solid #ccc;
  border-radius: 8px;
  margin-top: 10px;
}