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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #f5f5f5;
}

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

.loading-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-size: 20px;
  color: #666;
}

/* Utility classes */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  transition: all 0.2s;
}

.btn-primary {
  background-color: #d32f2f;
  color: white;
}

.btn-primary:hover {
  background-color: #b71c1c;
}

.btn-secondary {
  background-color: #757575;
  color: white;
}

.btn-secondary:hover {
  background-color: #616161;
}

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