:root {
  --color-principal: #1E3A8A;
  --color-secundario: #FBBF24;
  --color-exito: #28a745;
  --color-exito-hover: #1d8c37;
  --color-beige: #FDF6EC;
  --color-gris-hielo: #E5E7EB;
  --color-azul-metalico: #065b97;
  --color-gris-navegador: #4B5563;
  --color-azure-links: azure;
}

* {
  box-sizing: border-box;
}

body {
  background-color: var(--color-gris-hielo);
  font-family: Arial, Helvetica, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Título */
h1 {
  color: var(--color-principal);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

/* Navbar */
.navbar-brand {
  color: var(--color-secundario) !important;
}

.nav-link {
  /* color: var(--color-azure-links) !important; */
  font-weight: 500;
}

/* .nav-link:hover {
  color: var(--color-secundario) !important;
} */

/* Textarea */
textarea {
  width: 100%;
  max-width: 800px;
  height: 12rem;
  background-color: var(--color-beige);
  border: 2px solid var(--color-gris-navegador);
  border-radius: 7px;
  color: var(--color-principal);
  padding: 0.8rem;
  font-size: 1.1rem;
  resize: vertical;
}

/* Selectores */
.selectors {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 1rem;
}

.selector__item {
  flex: 1 1 45%;
  min-width: 200px;
}

label {
  font-weight: bold;
  color: var(--color-principal);
  margin-bottom: 0.3rem;
  text-align: left;
  display: block;
}

select {
  width: 100%;
  padding: 0.7rem;
  border-radius: 7px;
  background-color: var(--color-azul-metalico);
  color: var(--color-azure-links);
  border: 2px solid var(--color-gris-navegador);
  font-size: 1rem;
}

/* Botón */
button {
  margin-top: 1.5rem;
  width: 100%;
  max-width: 250px;
  padding: 0.8rem;
  background-color: var(--color-exito);
  border: none;
  font-weight: bold;
  border-radius: 7px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 300ms ease;
}

button:hover {
  background-color: var(--color-exito-hover);
}

/* Resultado */
#output {
  background-color: var(--color-principal);
  color: var(--color-azure-links);
  padding: 1rem;
  border-radius: 7px;
  min-height: 8rem;
  font-size: 1rem;
  white-space: pre-wrap;
  box-shadow: inset 0 0 10px var(--color-secundario);
  width: 100%;
  max-width: 800px;
  margin: 1.5rem auto 0;
}

/* Footer */
footer {
  color: var(--color-principal);
  font-size: 0.9rem;
}

footer img {
  transition: transform 0.3s ease;
}

footer img:hover {
  transform: scale(1.2);
}

/* 📱 Responsividad */
@media (max-width: 768px) {
  textarea {
    height: 10rem;
    font-size: 1rem;
  }

  .selectors {
    flex-direction: column;
    align-items: center;
  }

  button {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0.5rem;
  }

  h1 {
    font-size: 1.4rem;
  }
}

/* Centrar el menú desplegable en modo móvil */
@media (max-width: 991px) {
    .navbar-collapse {
        text-align: center;
    }

    .navbar-nav {
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .navbar-nav .nav-item {
        width: 100%;
    }

    .navbar-nav .nav-link {
        width: 100%;
        padding: 0.75rem 1rem;
    }
}