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

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

.navbar {
  background-color: #2c3e50 !important;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
  font-weight: 600;
  font-size: 1.5rem;
}

.card {
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border-radius: 8px;
}

.note-card {
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.note-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary {
  background-color: #3498db;
  border-color: #3498db;
}

.btn-primary:hover {
  background-color: #2980b9;
  border-color: #2980b9;
}

.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-box {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
}

.auth-box h2 {
  margin-bottom: 2rem;
  text-align: center;
  color: #2c3e50;
}

.form-control {
  border: 1px solid #ddd;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border-radius: 4px;
}

.form-control:focus {
  border-color: #3498db;
  box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

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

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: #7f8c8d;
}

.empty-state h4 {
  color: #2c3e50;
  margin-bottom: 1rem;
}

.note-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.note-actions .btn {
  flex: 1;
}

@media (max-width: 768px) {
  .auth-box {
    margin: 1rem;
  }
  
  .note-card {
    margin-bottom: 1rem;
  }
}