.pop-up {
  background: rgb(10, 0, 5);
  border-radius: 4px;
  border: 1px solid rgba(139, 0, 0, 0.4);
  padding: 15px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  width: 90%;
  font-size: 1.2em;
  max-width: 600px;
  text-align: center;
  display: none;
  z-index: 1000;
}
.pop-up p {
  letter-spacing: 1px;
  margin: 20px;
  text-align: justify;
}

.pop-up a {
  color: #ff4d4d;
  text-decoration: none;
  transition: color 0.3s ease;
  font-weight: bold;
}

.pop-up a:hover {
  color: #ffffff;
  text-shadow: 0 0 5px rgba(255, 77, 77, 0.6);
}

.pop-up button {
  margin-top: 15px;
  width: 100%;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(49, 0, 0, 0.3);
  color: white;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
  font-size: 1rem;
}

.pop-up button:hover {
  color: #ffffff;
  border: 1px solid #8b0000;
  background: rgb(90, 0, 0);
  box-shadow:
    inset 0 0 10px rgba(0, 0, 0, 0.8),
    0 0 15px rgba(139, 0, 0, 0.4);
}

#pop-up-pick-dif {
  display: block;
}
#difficulty-picker-container {
  z-index: 1000;
  display: block;
  width: 100vw;
  height: 100vh;
  background-color: black;
}