html {
  height: 100%;
  width: 100%;
}

body {
  background-color: #2C2C2C;
  color: #E0E0E0;
  font-family: Arial, sans-serif;
}

.container-lg {
  margin-top: 50px;
}

.index_h3 {
  color: #CCCCCC;
}

.nav-pills .nav-link {
  border-radius: 5px;
  background-color: #444444;
  color: #CCCCCC;
  margin-right: 10px;
  padding: 10px 20px;
  font-size: 16px;
  font-weight: normal;
  border: none;
  transition: background-color 0.3s, color 0.3s;
}

.nav-pills .nav-link.active {
  background-color: #007BFF;
  color: #FFFFFF;
}

.nav-pills .nav-link:hover {
  background-color: #0056b3;
  color: #FFFFFF;
}

.input-group .form-control {
  background-color: #444444;
  color: #CCCCCC;
  border: 1px solid #555555;
  border-radius: 20px;
  padding: 10px;
  transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}

.input-group .form-control:focus {
  background-color: #555555;
  border-color: #007BFF;
  color: #FFFFFF;
}

.input-group .btn {
  background-color: #444444;
  color: #CCCCCC;
  border: 1px solid #555555;
  border-radius: 20px;
  padding: 10px 20px;
  transition: background-color 0.3s, color 0.3s;
}

.input-group .btn:hover {
  background-color: #007BFF;
  color: #FFFFFF;
}

.ratio-16x9 {
  background-color: #000000;
  margin-top: 20px;
}

iframe {
  width: 100%;
  height: 100%;
}

#pills-series {
  display: none;
}