* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f8f9fa;
  color: #212529;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: #000;
}
.logo {
  height: 50px;
}
nav a {
  color: #fff;
  margin-left: 20px;
  text-decoration: none;
  font-weight: 500;
}
.hero {
  text-align: center;
  padding: 4rem 2rem;
  background: #111;
  color: white;
}
.section {
  padding: 3rem 2rem;
  max-width: 900px;
  margin: auto;
}
.section h2 {
  margin-bottom: 1rem;
}
ul {
  list-style: disc;
  padding-left: 1.5rem;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}
table, th, td {
  border: 1px solid #ccc;
}
th, td {
  padding: 1rem;
  text-align: left;
}
.note {
  margin-top: 1rem;
  font-style: italic;
}
footer {
  text-align: center;
  background: #000;
  color: white;
  padding: 1rem;
  margin-top: 2rem;
}