body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f6f9fc;
  line-height: 1.5;
}

header {
  background: #1b2938;
  color: #fff;
  padding: 30px 0;
  text-align: center;
}

nav {
  background: #fff;
  padding: 10px 0;
  display: flex;
  justify-content: space-evenly;
  border-bottom: 1px solid #ddd;
}

nav a {
  color: #1b2938;
  text-decoration: none;
  padding: 10px 20px;
}

nav a.active, nav a:hover {
  background: #bdd4e7;
  color: #1b2938;
}

footer {
  background: #1b2938;
  color: #fff;
  text-align: center;
  padding: 20px 0;
}

footer a {
  color: #fff;
  text-decoration: none;
}

.profile {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.profile img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
}

.socials {
  margin-top: 20px;
}

.socials a {
  color: #bdd4e7;
  text-decoration: none;
  margin: 0 10px;
}

.socials a:hover {
  text-decoration: underline;
  color: #fff;
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

section {
  background: #fff;
  border-radius: 5px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 4px 0 rgba(0,0,0,0.2);
}

section header {
  border-bottom: 1px solid #ddd;
  margin-bottom: 10px;
}

section header p {
  font-size: 2em;
  font-weight: bold;
  margin-bottom: 5px;
}

section header time {
  color: #acaaaa;
  font-size: 0.9em;
}

section span {
  font-size: 1.1em;
  font-weight: bold;
  color: #333;
  display: block;
  margin-bottom: 10px;
}

section ul {
  list-style-type: disc;
  margin-left: 20px;
}

section ul li {
  margin-bottom: 10px;
}

.job-list {
  list-style-type: none;
  padding-left: 0;
}

.project img {
  width: 50%;
  max-width: 100%;
  height: auto;
}

.cert-badge {
  width: 150px;  
  height: auto;
  display: block;
  margin: auto;
}

.cert-link {
  display: inline-block;
  margin: 10px;
  text-align: center;
}