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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  background: #f5f7fa;
  color: #2c3e50;
}

.navbar {
  background: #2c3e50;
  color: white;
  padding: 15px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar h1 {
  font-size: 24px;
  font-weight: 600;
}

.navbar-links {
  display: flex;
  gap: 25px;
  align-items: center;
}

.navbar a {
  color: white;
  text-decoration: none;
  font-size: 15px;
  transition: opacity 0.2s;
}

.navbar a:hover {
  opacity: 0.8;
}

.navbar-user {
  color: #95a5a6;
  font-size: 14px;
}

.container {
  max-width: 1400px;
  margin: 30px auto;
  padding: 0 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-card h3 {
  color: #7f8c8d;
  font-size: 13px;
  margin-bottom: 10px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.stat-card .value {
  font-size: 36px;
  font-weight: bold;
  color: #2c3e50;
}

.stat-card .subtext {
  margin-top: 10px;
  color: #95a5a6;
  font-size: 14px;
}

.card {
  background: white;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.card h2 {
  margin-bottom: 20px;
  font-size: 20px;
  color: #2c3e50;
}

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

th, td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #ecf0f1;
}

th {
  background: #34495e;
  color: white;
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

tr:hover {
  background: #f8f9fa;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.badge.active {
  background: #d4edda;
  color: #155724;
}

.badge.inactive {
  background: #f8d7da;
  color: #721c24;
}

.badge.warning {
  background: #fff3cd;
  color: #856404;
}

.badge.danger {
  background: #f8d7da;
  color: #721c24;
}

.btn {
  display: inline-block;
  padding: 8px 16px;
  background: #3498db;
  color: white;
  text-decoration: none;
  border-radius: 4px;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.btn:hover {
  background: #2980b9;
}

.btn-success {
  background: #27ae60;
}

.btn-success:hover {
  background: #229954;
}

.btn-danger {
  background: #e74c3c;
}

.btn-danger:hover {
  background: #c0392b;
}

.btn-small {
  padding: 5px 12px;
  font-size: 13px;
}

.progress-bar {
  width: 120px;
  height: 8px;
  background: #ecf0f1;
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: #3498db;
  transition: width 0.3s;
}

.progress-fill.warning {
  background: #f39c12;
}

.progress-fill.danger {
  background: #e74c3c;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  color: #7f8c8d;
  font-size: 14px;
  font-weight: 600;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #3498db;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.info-item {
  margin-bottom: 15px;
}

.info-item label {
  display: block;
  color: #7f8c8d;
  font-size: 12px;
  margin-bottom: 5px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.info-item .value {
  font-size: 16px;
  color: #2c3e50;
  font-weight: 500;
}

.info-item code {
  background: #f8f9fa;
  padding: 4px 8px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 14px;
}

.alert {
  padding: 15px;
  border-radius: 4px;
  margin-bottom: 20px;
}

.alert-info {
  background: #d1ecf1;
  color: #0c5460;
  border-left: 4px solid #17a2b8;
}

.alert-warning {
  background: #fff3cd;
  color: #856404;
  border-left: 4px solid #ffc107;
}

.alert-danger {
  background: #f8d7da;
  color: #721c24;
  border-left: 4px solid #dc3545;
}

.text-muted {
  color: #95a5a6;
  font-size: 14px;
}

.text-center {
  text-align: center;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}