body {
  margin: 0;
  font-family: Arial;
  background: #f4f6f9;
}

.container {
  display: flex;
}

.sidebar {
  width: 220px;
  background: #1f2937;
  color: white;
  height: 100vh;
  padding: 20px;
}

.main {
  flex: 1;
  padding: 20px;
}

.navbar {
  display: flex;
  justify-content: space-between;
  background: white;
  padding: 10px;
  border-radius: 10px;
}

.form-section {
  margin-top: 20px;
  background: white;
  padding: 15px;
  border-radius: 10px;
}

input {
  padding: 8px;
  margin: 5px;
}

button {
  padding: 8px 12px;
  cursor: pointer;
}

.table-section {
  margin-top: 20px;
  background: white;
  padding: 15px;
  border-radius: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 10px;
  border-bottom: 1px solid #ddd;
}
body.dark {
  background: #111827;
  color: white;
}

body.dark .sidebar {
  background: #0f172a;
}

body.dark .card,
body.dark .form-section,
body.dark .table-section,
body.dark .navbar {
  background: #1f2937;
  color: white;
}

body.dark input {
  background: #111827;
  color: white;
  border: 1px solid #374151;
}

body.dark table {
  color: white;
}

body.dark button {
  background: #2563eb;
  color: white;
}