html, body {
  height: 100%;
  margin: 0;
  font-family: "Open Sans", sans-serif;
  color: #e9ecef;
  position: relative;
  overflow: hidden;
}

body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #444, #bbb);
  z-index: -1;
}

/* Fondo con partículas negro */
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, #000000, #000000, #000000);
  z-index: 1;
}

/* Contenedor del login */
.login-container {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 15px;
  position: relative;
  z-index: 1;
}

/* Logo */
.logo img {
  width: 300px;
  opacity: 0.9;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.4));
  margin-bottom: 20px;
}

/* Caja del login */
.login-box {
  padding: 30px 25px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05); /* glass suave */
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  max-width: 350px;
  width: 100%;
}

/* Etiquetas */
label {
  font-size: 0.8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #e0e0e0; /* gris muy claro */
  margin-bottom: 4px;
}

/* Inputs */
.form-control {
  background: transparent;
  border: none;
  border-bottom: 1px solid #777;
  border-radius: 0;
  color: #ffffff;
  font-weight: 500;
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.form-control:focus {
  border-color: #aaa;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
  background: transparent;
  outline: none;
}

.form-control::placeholder {
  color: #999;
}

/* Botón de login */
.btn-login {
  width: 100%;
  background-color: #e0e0e0;
  border: none;
  border-radius: 4px;
  color: #111;
  font-weight: 600;
  font-size: 1rem;
  padding: 12px 0;
  margin-top: 15px;
  transition: all 0.4s ease;
}

.btn-login:hover {
  background-color: #ffffff;
  color: #000;
  transform: translateY(-1px);
  box-shadow: 0 6px 15px rgba(255, 255, 255, 0.2);
}

/* Grupo del campo */
.form-group {
  position: relative;
  margin-bottom: 1.5rem;
}

/* Mostrar contraseña */
.toggle-password {
  position: absolute;
  top: 34px;
  right: 0;
  background: transparent;
  border: none;
  color: #aaa;
  cursor: pointer;
  padding: 0 8px;
  font-size: 1rem;
  z-index: 1;
  outline: none;
  box-shadow: none;
  transition: color 0.3s ease;
}

.toggle-password:hover {
  color: #fff;
}

/* Loader oscuro */
.loader-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  opacity: 1;
  transition: opacity 0.5s ease;
}

.loader-overlay.hide {
  opacity: 0;
  pointer-events: none;
}

.loader-spinner {
  border: 6px solid rgba(255, 255, 255, 0.2);
  border-top: 6px solid #ffffff;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}


/* Select2 con fondo oscuro degradado */
.select2-container--bootstrap4 .select2-selection {
  background: linear-gradient(to right, #000000, #1a1a1a, #000000) !important;
  border: none !important;
  border-bottom: 1px solid #666 !important;
  border-radius: 0 !important;
  color: #ffffff !important;
  height: 38px !important;
  padding-left: 0.5rem !important;
}

.select2-container--bootstrap4 .select2-selection__rendered {
  color: #ffffff !important;
  line-height: 36px !important;
  background: transparent !important;
}

.select2-container--bootstrap4 .select2-selection__arrow {
  height: 36px !important;
  color: #cccccc !important;
}

.select2-container--bootstrap4.select2-container--focus .select2-selection {
  background: linear-gradient(to right, #000000, #1a1a1a, #000000) !important;
  border-bottom-color: #999 !important;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.15) !important;
}

.select2-container--bootstrap4 .select2-dropdown {
  background-color: rgba(20, 20, 20, 0.95) !important;
  border: 1px solid #444 !important;
  color: #ffffff !important;
  backdrop-filter: blur(8px);
}

.select2-container--bootstrap4 .select2-results__option {
  color: #ffffff !important;
  padding: 6px 12px;
  background: transparent !important;
}

.select2-container--bootstrap4 .select2-results__option--highlighted {
  background: linear-gradient(to right, #333333, #222222, #333333) !important;
  color: #ffffff !important;
}

.select2-container--bootstrap4 .select2-selection__placeholder {
  color: #cccccc !important;
}

.select2-container--bootstrap4 .select2-selection__rendered.fade-in {
  animation: fadeIn 0.4s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.select2-container--bootstrap4 .select2-selection__arrow b {
  border-color: #ffffff transparent transparent transparent !important;
  border-width: 6px 6px 0 6px !important;
  margin-top: -20px !important;
}

.select2-container--bootstrap4.hide-arrow .select2-selection__arrow b {
  display: none !important;
}

/* Hover en opciones */
.select2-container--bootstrap4 .select2-results__option:hover {
  background: rgba(80, 80, 80, 0.6) !important;
}

/* Opción seleccionada */
.select2-container--bootstrap4 .select2-results__option[aria-selected=true] {
  background: rgba(100, 100, 100, 0.8) !important;
}

/* Input de búsqueda dentro del dropdown */
.select2-container--bootstrap4 .select2-search--dropdown .select2-search__field {
  background: transparent !important;
  border: none !important;
  border-bottom: 1px solid #666 !important;
  border-radius: 0 !important;
  color: #ffffff !important;
  font-weight: 500 !important;
  transition: border-color 0.4s ease, box-shadow 0.4s ease !important;
  padding-left: 0 !important;
  width: 100% !important;
}

/* Input de búsqueda enfocado */
.select2-container--bootstrap4 .select2-search--dropdown .select2-search__field:focus {
  border-color: #aaa !important;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1) !important;
  background: transparent !important;
  outline: none !important;
}

/* Placeholder del input */
.select2-container--bootstrap4 .select2-search--dropdown .select2-search__field::placeholder {
  color: #aaaaaa !important;
  opacity: 1 !important;
}

/* Contenedor del input de búsqueda */
.select2-container--bootstrap4 .select2-search--dropdown {
  background: transparent !important;
  padding: 8px !important;
}

/* Ajustes adicionales para select2 múltiple */
.select2-container--bootstrap4 .select2-search__field {
  background: transparent !important;
  border: none !important;
  border-bottom: 1px solid #666 !important;
  color: #ffffff !important;
  margin-top: -3px !important;
}

.select2-container--bootstrap4 .select2-search__field:focus {
  border-color: #aaa !important;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.1) !important;
}