* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  display: flex;
  height: 100vh;
  background-color: #f4f4f9;
}

.container {
  display: flex;
  width: 100%;
}

.sidebar {
  width: 15%;
  background-color: #333;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 2rem;
}

.sidebar button {
  background: #444;
  color: #fff;
  padding: 1rem;
  margin: 1rem;
  border: none;
  width: 80%;
  cursor: pointer;
  font-size: 1rem;
}

.sidebar button:hover {
  background: #555;
}

.panel {
  display: none;
  width: 85%;
  padding: 2rem;
  overflow-y: auto;
}

.panel.active {
  display: block;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: #333;
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: #444;
}

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

ul li {
  font-size: 1rem;
  margin: 0.5rem 0;
}

.projects, .contact {
  margin-top: 2rem;
}

.project {
  margin-bottom: 1.5rem;
}

.project h3 {
  font-size: 1.4rem;
  color: #333;
}

.project p {
  font-size: 1rem;
}

.project a {
  color: #0066cc;
  text-decoration: none;
}

.project a:hover {
  text-decoration: underline;
}