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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.6;
}

.navbar {
  background: #1a73e8;
  color: white;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-brand {
  color: white;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.25rem;
}

.nav-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-size: 0.9rem;
}

.nav-links a:hover {
  color: white;
}

.container {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

h1 {
  margin-bottom: 1rem;
  color: #1a1a1a;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.stat-card {
  background: white;
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stat-card h3 {
  font-size: 2rem;
  color: #1a73e8;
}

.stat-card p {
  color: #666;
  margin: 0.5rem 0;
}

.stat-card a {
  color: #1a73e8;
  text-decoration: none;
  font-size: 0.9rem;
}

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

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid #eee;
}

th {
  background: #f8f9fa;
  font-weight: 600;
  color: #555;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: 500;
  color: #555;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.form-row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.form-row .form-group {
  flex: 1;
  min-width: 150px;
}

.filters-form {
  background: white;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  margin-bottom: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: white;
  color: #333;
  text-decoration: none;
  cursor: pointer;
  font-size: 0.9rem;
}

.btn-primary {
  background: #1a73e8;
  color: white;
  border-color: #1a73e8;
}

.btn-danger {
  background: #dc3545;
  color: white;
  border-color: #dc3545;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
}

.alert {
  padding: 0.75rem 1rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.alert-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.login-container {
  max-width: 400px;
  margin: 4rem auto;
  padding: 2rem;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.login-container h1 {
  color: #1a73e8;
}

.login-container form {
  text-align: left;
  margin-top: 1.5rem;
}

.qr-code img {
  display: block;
  margin: 1rem auto;
}

.btn-warning {
  background: #ffc107;
  color: #333;
  border-color: #ffc107;
}

.btn-link {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0;
  text-decoration: none;
}

.btn-link:hover {
  color: white;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-success {
  background: #d4edda;
  color: #155724;
}

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

.table {
  width: 100%;
}

.form-group small {
  display: block;
  margin-top: 0.25rem;
  color: #666;
  font-size: 0.85rem;
}