Gerador de Floating Label Entrada CSS

.field {
  position: relative;
  max-width: 320px;
}

.field input {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid #475569;
  background: white;
  color: #0f172a;
}

.field label {
  position: absolute;
  left: 10px;
  top: 10px;
  transition: all 0.3s ease;
  background: white;
  padding: 0 4px;
  color: #64748b;
}

.field input:focus + label,
.field input:not(:placeholder-shown) + label {
  top: -8px;
  font-size: 12px;
  color: #2563eb;
}