:root {
  --color-azul: #004FCC;
  --color-azul-claro: #007AFF;
  --color-dorado: #FFD166;
  --color-blanco: #FFFFFF;
  --color-gris: #F5F6FA;
  --color-texto: #222222;
  --radius: 12px;
  --sombra: 0 6px 20px rgba(0, 0, 0, 0.1);
  --transicion: all 0.3s ease-in-out;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  background: linear-gradient(135deg, var(--color-azul), var(--color-azul-claro));
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.registro-wrapper {
  width: 100%;
  max-width: 420px;
}

.registro-card {
  background: var(--color-blanco);
  border-radius: var(--radius);
  padding: 40px 30px;
  box-shadow: var(--sombra);
  animation: fadeUp 0.8s ease;
}

.titulo {
  text-align: center;
  font-size: 1.9em;
  color: var(--color-azul);
  font-weight: 700;
}

.subtitulo {
  text-align: center;
  color: #555;
  font-size: 0.95em;
  margin-top: 5px;
  margin-bottom: 25px;
}

.formulario {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.campo {
  display: flex;
  flex-direction: column;
}

label {
  font-weight: 500;
  font-size: 0.9em;
  margin-bottom: 6px;
  color: #333;
}

input {
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: var(--radius);
  outline: none;
  transition: var(--transicion);
  font-size: 0.95em;
}

input:focus {
  border-color: var(--color-azul);
  box-shadow: 0 0 0 3px rgba(0, 79, 204, 0.2);
}

button {
  background: linear-gradient(135deg, var(--color-azul), var(--color-azul-claro));
  color: var(--color-blanco);
  border: none;
  border-radius: var(--radius);
  padding: 14px;
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transicion);
}

button:hover {
  background: var(--color-dorado);
  color: #111;
  transform: translateY(-1px);
}

.mensaje {
  text-align: center;
  margin-top: 18px;
  font-size: 0.95em;
  min-height: 20px;
}

.volver {
  text-align: center;
  margin-top: 25px;
}

.volver a {
  color: var(--color-azul);
  text-decoration: none;
  font-size: 0.9em;
  font-weight: 500;
  transition: var(--transicion);
}

.volver a:hover {
  color: var(--color-dorado);
}

/* 📱 Responsivo */
@media (max-width: 480px) {
  .registro-card {
    padding: 30px 20px;
  }

  .titulo {
    font-size: 1.6em;
  }

  input, button {
    font-size: 1em;
  }
}

/* ✨ Animación */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(25px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
/* 🔹 Enlace al login */
.login-link {
  text-align: center;
  margin-top: 18px;
  font-size: 0.9em;
  color: #555;
}

.login-link a {
  color: var(--color-azul);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transicion);
}

.login-link a:hover {
  color: var(--color-dorado);
}