body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 220px;
  background-color: #1e272e;
  color: white;
  padding: 20px;
  box-sizing: border-box;
}

.sidebar h3 {
  color: #00d8d6;
  margin-top: 0;
}

.sidebar a {
  display: block;
  padding: 10px;
  color: white;
  text-decoration: none;
  background: #485460;
  border-radius: 5px;
  margin: 8px 0;
}

.sidebar a:hover {
  background: #00d8d6;
  color: black;
}

.content {
  flex: 1;
  padding: 20px;
  background-color: #f1f2f6;
  overflow-y: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  background: white;
}

th, td {
  padding: 12px;
  border: 1px solid #ccc;
  text-align: left;
}

th {
  background-color: #f7f7f7;
}

form input, form button {
  padding: 8px;
  margin-right: 10px;
  font-size: 14px;
}

form button {
  background: #1e90ff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

form button:hover {
  background: #0c7cd5;
}

.modal {
  display: none;
  position: fixed;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  background: white;
  padding: 20px;
  border: 1px solid #ccc;
  box-shadow: 0 0 10px rgba(0,0,0,0.3);
  z-index: 999;
}