body {
  font-family: Arial, sans-serif;
  margin: 0;
  line-height: 1.6;
  background: #f4f6f8;
  color: #222;
}

header {
  background: #0f172a;
  color: white;
  padding: 40px 20px;
  text-align: center;
}

header h1 {
  margin-bottom: 10px;
}

nav {
  background: #1e293b;
  padding: 12px;
  text-align: center;
}

nav a {
  color: white;
  text-decoration: none;
  margin: 0 12px;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 1000px;
  margin: 30px auto;
  padding: 0 20px;
}

section {
  background: white;
  padding: 25px;
  margin-bottom: 22px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

h2 {
  color: #0f172a;
  border-left: 5px solid #2563eb;
  padding-left: 10px;
}

h3 {
  color: #1e293b;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}

table, th, td {
  border: 1px solid #d1d5db;
}

th {
  background: #e2e8f0;
}

th, td {
  padding: 12px;
  text-align: left;
}

footer {
  text-align: center;
  background: #0f172a;
  color: white;
  padding: 20px;
  margin-top: 30px;
}