* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
}

.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background: #1a1a2e;
  color: #fff;
  padding: 20px;
}

.sidebar h2 {
  margin-bottom: 24px;
  font-size: 18px;
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  margin-bottom: 8px;
}

.sidebar a {
  color: #ccc;
  text-decoration: none;
  padding: 8px 12px;
  display: block;
  border-radius: 6px;
}

.sidebar a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.content {
  flex: 1;
  padding: 32px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

h1 {
  font-size: 24px;
  margin-bottom: 16px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid #eee;
}

th {
  background: #f8f9fa;
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  color: #666;
}

form {
  max-width: 500px;
  background: #fff;
  padding: 24px;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

label {
  display: block;
  margin-bottom: 16px;
  font-weight: 500;
  font-size: 14px;
}

label.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
select {
  display: block;
  width: 100%;
  padding: 8px 12px;
  margin-top: 4px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
}

button {
  padding: 10px 20px;
  background: #4f46e5;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}

button:hover {
  background: #4338ca;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 6px;
  font-size: 14px;
}

.btn-primary {
  background: #4f46e5;
  color: #fff;
}

.error {
  color: #dc2626;
  margin: 8px 0;
  font-size: 14px;
}

.login-page {
  max-width: 400px;
  margin: 100px auto;
}