body {
  font-family: Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #f6f6f6;
  color: #333;
}
header {
  background-color: #000;
  color: white;
  display: flex;
  align-items: center;
  padding: 15px 25px;
  justify-content: flex-start;
  gap: 20px;
}
header img {
  height: 60px;
}
nav {
  background-color: #333;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
nav a {
  color: white;
  text-decoration: none;
  padding: 14px 20px;
  display: block;
}
nav a:hover {
  background-color: #666;
}
main {
  flex: 1;
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  background-color: white;
}
footer {
  background-color: #000;
  color: white;
  text-align: center;
  padding: 10px 0;
  position: sticky;
  bottom: 0;
  width: 100%;
}
.button-center {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}
.button-center a {
  background-color: #000;
  color: white;
  padding: 15px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 18px;
}
.button-center a:hover {
  background-color: #333;
}
.table-container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.table, .activity {
  background-color: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
  flex: 1;
}
.table table {
  width: 100%;
  border-collapse: collapse;
}
.table td {
  padding: 10px;
  border-bottom: 1px solid #ddd;
}
.activity ul {
  margin: 0;
  padding-left: 20px;
}