/* Contenedor del flip */
.card-flip-container {
  perspective: 1200px;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.card-flip {
  position: relative;
  width: 100%;
  /* Altura fluida: mínimo 560px, preferido ~78vh, máximo 860px */
  min-height: 560px;
  height: 78vh;
  max-height: 860px;
  transform-style: preserve-3d;
  transition: transform 0.7s ease;
}

.card-flip.flipped {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  /* height: 100%; */
  backface-visibility: hidden;
  overflow: hidden;
}

.card-face.front {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px;
}

.card-face.back {
  transform: rotateY(180deg);
}

/* Caja de registro */
.register-card {
  /* Variables locales */
  --brand: #0d6efd;
  --brand-600: #0b5ed7;
  --surface: #ffffff;
  --surface-2: #f7f9fc;
  --text-900: #1f2937;
  --text-700: #374151;
  --text-600: #475569;
  --border: #e5e7eb;
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.08);

  background: linear-gradient(180deg, #ffffff, #fafbff);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Centrar la card de login en la cara frontal */
.card-face.front .login-modern-card {
  margin-left: auto;
  margin-right: auto;
  margin-top: 30px;
}

.register-card-header .volver-login {
  font-size: 0.9rem;
}

.register-card-header {
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px dashed #e5e7eb;
}


/* Scroll del formulario de registro */
.register-card>#containerParticular.container-scroll {
  overflow: auto;
  padding-right: 6px;
  /* ocupa el espacio disponible debajo del header */
  flex: 1 1 auto;
}

/* Inputs y labels del formulario de registro */
.inputContainer {
  position: relative;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column-reverse;
  /* Muestra el label por encima aunque esté declarado después */
}

.input,
select {
  width: 100%;
  border: 1px solid #e3e6ef;
  border-radius: 12px;
  padding: 10px 14px;
  outline: none;
  background: #fff;
  color: var(--text-700);
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.register-card .inputContainer>label {
  display: block;
  font-weight: 600;
  color: var(--text-600);
  font-size: 0.7rem;
  text-transform: uppercase;
}

.register-card .input:focus,
.register-card select:focus {
  border-color: var(--brand);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(13, 110, 253, .10);
}

.register-card .input:focus+label,
.register-card select:focus+label {
  color: var(--brand);
}

/* Placeholder sutil */
.register-card .input::placeholder {
  color: #9aa4b2;
}

.register-card .btnBorderSave {
  background: #0056b3;
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 12px 16px;
  box-shadow: 0 8px 20px rgba(13, 110, 253, .25);
  transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
}

.register-card .btnBorderSave:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(13, 110, 253, .32);
}

.register-card .btnBorderSave:active {
  transform: translateY(0);
  box-shadow: 0 6px 16px rgba(13, 110, 253, .20);
}

/* Mejoras de radio de tipo de persona */
.opcionesPersona .radio-input label span {
  font-weight: 600;
}

.opcionesPersona .radio-input input[type="radio"] {
  accent-color: var(--brand);
}

/* Alert estilizada */
.register-card .alert {
  border-radius: 12px;
  border: 1px solid #facc15;
  background: #fefce8;
  color: #854d0e;
}

/* Espaciado entre filas */
.register-card .form .row>[class^="col-"] {
  margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 768px) {
  .card-flip {
    height: 82vh;
    min-height: 560px;
    max-height: 920px;
  }

  #containerParticular.container-scroll {
    max-height: 480px;
  }

  .card-face.front .login-modern-card {
    margin-left: auto;
    margin-right: auto;
    margin-top: 0;
  }
}

/* Scrollbar visual dentro del formulario */
#containerParticular.container-scroll::-webkit-scrollbar {
  width: 8px;
}

#containerParticular.container-scroll::-webkit-scrollbar-track {
  background: transparent;
}

#containerParticular.container-scroll::-webkit-scrollbar-thumb {
  background: rgba(2, 6, 23, 0.12);
  border-radius: 10px;
}

#containerParticular.container-scroll::-webkit-scrollbar-thumb:hover {
  background: rgba(13, 110, 253, 0.35);
}


@media screen and (max-width: 600px) {
  .register-card .inputContainer>label {
    font-size: 0.6rem;
    margin-bottom: 4px;
  }

  .register-card .input,
  .register-card select,
  .register-card .input,
  .register-card input {
    padding: 5px 10px;
  }

}