/* Element selector - targets all <p> tags */
p {
  font-size: 18px;
  color: #333333;
}

/* Class selector - targets any element with class="highlight" */
.highlight {
  background-color: yellow;
  font-weight: bold;
}

/* ID selector - targets the element with id="main-title" */
#main-title {
  color: crimson;
  font-size: 2em;
}