.form-demo {
  display: grid;
  gap: 1rem;
  max-width: 400px;
}
.form-group {
  position: relative;
}
.form-input {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e2e8f0;
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-sizing: border-box;
}
.form-input:focus {
  outline: none;
  border-color: currentColor;
  box-shadow: 0 0 0 3px rgba(0,0,0,0.1);
}
.form-group.success { color: #27ae60; }
.form-group.error { color: #e74c3c; }
.form-group.warning { color: #f39c12; }
.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: currentColor;
}