body {
  font-family: system-ui, sans-serif;
  background: #fafafa;
  color: #333;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

.hamburger {
  font-size: 2rem;
  cursor: pointer;
  padding: 0.5rem 1rem;
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 2000;
  background: none;   
  border: none;       
}



.sidebar {
  position: fixed;
  top: 0;
  left: -250px; 
  width: 220px;
  height: 100%;
  background: #fff;
  border-right: 1px solid #ddd;
  padding: 1.5rem 1rem;
  box-shadow: 2px 0 6px rgba(0,0,0,0.05);
  transition: left 0.3s ease;
  z-index: 1500;
}


.sidebar.active {
  left: 0;
}


.sidebar h2 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  text-align: center;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar li {
  margin-bottom: 0.8rem;
}

.sidebar a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
}

.sidebar a:hover {
  color: #0066cc;
}


main {
  max-width: 700px;
  margin: 4rem auto;
}

h1 {
  text-align: center;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1rem auto;
}

h3 {
  margin-top: 2rem;
  color: #444;
  text-align: center;
}

a {
  color: #0066cc;
  text-decoration: none;
  text-align: center;
  display: flex;
  justify-content: center;
}