a.item {
  border-radius:4px;
  color: white;
  padding: 16px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  transition-duration: 0.4s;
  cursor: pointer;
  background: #253950;
}
a.item:hover {
  border-radius: 4px;
  color: white;
  padding: 16px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  transition-duration: 0.4s;
  cursor: pointer;
  background: black;
};
.button {
  background-color: #4CAF50;
  border: none;
  color: white;
  padding: 16px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
}
iframe{
  border: 0;
  width: 1200px;
  height: 700px;
  display: block;
  margin: auto;
  border-radius: 8px;
}
#game{
  border: 0;
  width: 1200px;
  height: 700px;
  display: block;
  margin: auto;
  border-radius: 8px;
}
button {
    background-color: #253950;
    border: none;
    color: white;
    padding: 24px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 4px;
  }
button:hover {
    border-radius: 4px;
    color: white;
    padding: 24px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    transition-duration: 0.4s;
    cursor: pointer;
    background: black;
}
#search-container {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

#search-input {
  padding: 0.5rem;
  background-color: transparent;
  border: 1px solid black;
  border-radius: 0.5rem;
  box-shadow: 0 0 0.5rem rgba(0, 0, 0, 0.2);
  font-size: 1rem;
  width: 50%;
  max-width: 20rem;
  color: white;

}
#search-input::placeholder {
  color: white;
}

#search-input:focus {
  outline: none;
  box-shadow: 0 0 0.5rem rgba(0, 0, 0, 0.4);
}
#math-container {
  display: flex;
  justify-content: center;
  align-items: center;
}
#search-bar {
  padding: 0.5rem;
  background-color: transparent;
  border: 1px solid black;
  border-radius: 0.5rem;
  box-shadow: 0 0 0.5rem rgba(0, 0, 0, 0.2);
  font-size: 1rem;
  width: 50%;
  max-width: 20rem;
  color: white;

}
#search-bar::placeholder {
  color: white;
}