/* ==========================
   ESTILO BASE ORIGINAL
========================== */
body {
  font-family: "Poppins", sans-serif;
  background: linear-gradient(135deg, #2c3e50, #4ca1af);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  padding: 20px;
}

/* CONTENEDOR PRINCIPAL */
.contenedor {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 30px 40px;
  width: 900px;
  max-width: 95%;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

h1 {
  margin-bottom: 20px;
  font-size: 1.6em;
}

/* CAMPOS DEL FORMULARIO */
.campo {
  margin-bottom: 15px;
  text-align: left;
}

label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
}

/* DROPDOWNS MÁS COMPACTOS */
select {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: none;
  outline: none;
  font-size: 0.9em;
  height: 40px; 
}

input[type="file"] {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: none;
  outline: none;
}


.boton {
  margin-top: 15px;
  width: 60%;
  background-color: #00b894;
  border: none;
  color: white;
  font-weight: bold;
  padding: 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.3s;
  font-size: 0.95em;
  margin-left: auto;
  margin-right: auto;
  display: block;
}

.boton:hover {
  background-color: #019875;
}

/* ==========================
   RESULTADOS
========================== */
.resultado {
  margin-top: 25px;
  width: 100%;
}

/* TARJETAS DE RESULTADOS */
.card-resultado {
  background: linear-gradient(145deg, #00b894, #019875);
  color: #fff;
  border-radius: 14px;
  padding: 25px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  animation: aparecer 0.6s ease;
  height: fit-content;
}

.card-resultado h2,
.card-resultado h3 {
  text-align: center;
  margin-bottom: 10px;
  font-weight: bold;
}

.res-item {
  margin: 6px 0;
  font-size: 1.05em;
}

.card-resultado hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.4);
  margin: 15px 0;
}

.total {
  font-size: 1.2em;
  text-align: center;
  font-weight: bold;
  margin-top: 10px;
}

.card-resultado.error {
  background: linear-gradient(145deg, #ff7675, #d63031);
}

/* BOTÓN DESCARGAR */
.acciones {
  text-align: center;
  margin-top: 15px;
}

.boton-descargar {
  display: inline-block;
  background-color: #0984e3;
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s;
  font-weight: 600;
}

.boton-descargar:hover {
  background-color: #74b9ff;
}

/* ==========================
   DOS COLUMNAS LATERALES
========================== */
.resultado-dos-columnas {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 25px;
  width: 100%;
}

.resultado-dos-columnas .card-resultado {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ==========================
   ANIMACIÓN
========================== */
@keyframes aparecer {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================
   ADAPTABILIDAD MÓVIL
========================== */
@media (max-width: 768px) {
  body {
    height: auto;
    padding: 20px;
  }

  .contenedor {
    width: 100%;
    max-width: 420px;
    padding: 20px;
  }

  .resultado-dos-columnas {
    flex-direction: column;
  }

  .resultado-dos-columnas .card-resultado {
    flex: 1 1 100%;
  }

  .boton {
    width: 80%;
  }
}

/* =============================
   🔵 Loader (Barra y Spinner)
============================= */

#loader-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  color: #fff;
  font-family: Arial, sans-serif;
  text-align: center;
  opacity: 0;
  transition: opacity 0.4s ease;
}

#loader-overlay[style*="display: flex"] {
  opacity: 1;
}

.loader-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.loader-spinner {
  width: 80px;
  height: 80px;
  border: 6px solid rgba(255, 255, 255, 0.2);
  border-top-color: #00b4d8;
  border-radius: 50%;
  animation: girar 1s linear infinite;
}

.loader-text {
  margin-top: 20px;
  font-size: 18px;
  font-weight: 500;
  text-shadow: 0 0 6px rgba(0, 180, 216, 0.8);
}

.barra-contenedor {
  width: 80%;
  max-width: 400px;
  height: 12px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  overflow: hidden;
  margin-top: 20px;
}

.barra-progreso {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #00b4d8, #48cae4, #90e0ef);
  transition: width 0.2s ease-in-out;
}

@keyframes girar {
  to { transform: rotate(360deg); }
}