body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    line-height: 1.6;
    padding: 0 20px;
    color: #333;
}
header {
    background-color: #067111a7;
    color: white;
    padding: 30px 20px;
    text-align: center;
    margin-top: 20px;
    border-radius: 8px;
}
header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}
nav {
  background-color: #333;
}
nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  padding: 0;
  margin: 0;
}
nav ul li {
  position: relative;
}
nav ul li a {
  color: white;
  text-decoration: none;
  display: block;
  padding: 14px 20px;
  transition: background 0.3s;
}
nav ul li a:hover {
  background-color: #81807f;
}
nav ul li ul {
  display: none;
  position: absolute;
  top: 48px;
  left: 0;
  background-color: #444;
  min-width: 180px;
  list-style: none;
  padding: 0;
}
nav ul li:hover ul {
  display: block;
}
main {
    display: flex;
    justify-content: center; 
    padding: 30px 0;
}
.container {
    width: 80%;             
    max-width: 900px;       
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}


.container h2 {
    color: #0b513b;
    border-left: 4px solid #ffc107;
    padding-left: 10px;
}


footer {
    background: #145a32;
    text-align: center;
    color: white;
    padding: 15px 0;
    margin-top: 20px;
}