body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: #0f172a;
  background-color: #f3f4f6;
}

.sidebar {
  width: 220px;
  background-color: #1f2a37;
  color: #ffffff;
  height: 100vh;
  padding: 16px;
  float: left;
}
.sidebar h2 {
  margin: 0 0 12px 0;
  font-size: 20px;
}
.menu { list-style: none; padding: 0; margin: 0; }
.menu li { margin: 10px 0; }
.menu a { color: #ffffff; text-decoration: none; }

.main {
  margin-left: 220px;
  padding: 16px;
}
.main h1 {
  margin: 0 0 16px 0;
  font-size: 24px;
}

.stats { margin: 10px 0 18px 0; }
.stat {
  display: inline-block;
  width: 31%;
  background-color: #ffffff;
  border: 1px solid #e5e7eb;
  padding: 12px;
  margin-right: 2%;
  vertical-align: top;
}
.stat:last-child { margin-right: 0; }
.stat-title { color: #1f2937; font-weight: bold; margin-bottom: 8px; }
.stat-value { color: #111827; }

.users {
  width: 100%;
  border-collapse: collapse;
  background-color: #ffffff;
  border: 1px solid #e5e7eb;
}
.users thead th {
  text-align: left;
  background-color: #eaeef2;
  color: #111827;
  padding: 10px 12px;
  border: 1px solid #e5e7eb;
}
.users tbody td {
  padding: 10px 12px;
  border: 1px solid #e5e7eb;
}
.row-odd  { background-color: #ffffff; }
.row-even { background-color: #f7f7f7; }