.reveal ul {
    display: block;
    padding-left: 0;
}

.reveal li {
    margin-bottom: 15px;
}

.option-button {
    display: block;
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: none;
    color: white;
    text-align: left;
    /* font-size: 18px; */
    cursor: pointer;
    transition: background-color 0.3s;
    border-radius: 10px;
    background-color: #efefef !important;
    color: black !important;
    border: #888888 2px solid !important;
}

.option-button:hover {
  background-color: #efefef !important;
  color: #555555 !important;
  border: #888888 2px solid !important;
}

.option-button.selected {
  background-color: #f9f9ff !important;
  color: black !important;
  border: #000088 2px solid !important;
}

.option-button.correct {
  background-color: #f9fff9 !important;
  color: black !important;
  border: #008800 2px solid !important;
}

.option-button.incorrect {
  background-color: #fff9f9 !important;
  color: black !important;
  border: #880000 2px solid !important;
}

.action-buttons {
    margin-top: 20px;
    font-weight: bold;
    font-size: 24px;
    top: 0%;
    border-radius: 10px;
}

.check-button,
.prev-button,
.next-button,
.reset-button {
    padding: 10px 20px;
    /* font-size: 18px; */
    cursor: pointer;
    border: none;
    color: white;
    margin-right: 10px;
}

.check-button {
    background-color: #2980b9;
}

.prev-button {
    background-color: #e5a43c;
}

.next-button {
    background-color: #27ae60;
}

.reset-button {
    background-color: #e74c3c;
}

.check-button:disabled,
.prev-button:disabled,
.next-button:disabled,
.reset-button:disabled {
    background-color: #7f8c8d;
    cursor: not-allowed;
}

.feedback {
    font-weight: bold;
    margin-top: 20px;
    font-size: 24px;
    /* center feedback */
    text-align: center;
}

.button-container {
    display: flex;
    justify-content: flex-end;
}