* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: sans-serif;
}
body {
  line-height: 1.6;
}
header {
  position: sticky;
  top: 0;
  background: black;
  color: white;
  padding: 10px 20px;
  z-index: 1000;
}
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
}
.nav-links li {
  margin-left: 20px;
}
.nav-links a {
  color: white;
  text-decoration: none;
}
.hero {
  text-align: center;
  background: #f4f4f4;
  padding: 40px;
}
.profile-pic {
  width: 150px;
  border-radius: 50%;
}
section {
  padding: 40px 20px;
  opacity: 0;
  transform: translateY(30px);
  transition: all 1s ease-out;
}
section.visible {
  opacity: 1;
  transform: translateY(0);
}
footer {
  background: #111;
  color: white;
  text-align: center;
  padding: 20px;
}
form input, form textarea {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
}
form button {
  padding: 10px 20px;
  background: black;
  color: white;
  border: none;
  cursor: pointer;
}
.blog-post {
  border-bottom: 1px solid #ccc;
  padding: 20px 0;
}
.blog-post h3 {
  margin-bottom: 5px;
}
.blog-post a {
  color: #0066cc;
  text-decoration: none;
}
.testimonial-container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.testimonial {
  background: #f1f1f1;
  padding: 20px;
  border-left: 4px solid #444;
  width: 100%;
  max-width: 300px;
}
#theme-toggle {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: white;
  margin-left: 20px;
}
body.dark-mode {
  background-color: #121212;
  color: #eee;
}
body.dark-mode nav {
  background-color: #1f1f1f;
}
body.dark-mode a {
  color: #1e90ff;
}
body.dark-mode .testimonial {
  background-color: #2a2a2a;
  color: #eee;
}
body.dark-mode .blog-post {
  border-color: #444;
}
body.dark-mode footer {
  background: #111;
  color: #ccc;
}