/* Existing styles ... */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #6B73FF, #000DFF);
    color: #fff;
}

#quiz-container {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 600px;
}

h1 {
    margin-bottom: 20px;
}

.option-btn {
    display: block;
    width: 100%;
    margin: 10px 0;
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 5px;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
    transition: background-color 0.3s, transform 0.3s;
}

.option-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

#next-btn {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    background-color: #0095DD;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

#next-btn:hover {
    background-color: #007bb5;
    transform: scale(1.05);
}

.hide {
    display: none;
}

.correct {
    background-color: rgba(76, 175, 80, 0.6);
}

.wrong {
    background-color: rgba(244, 67, 54, 0.6);
}


/* Landing Page */
#landing-page {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 600px;
    margin: auto;
}

#start-btn {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    background-color: #0095DD;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

#start-btn:hover {
    background-color: #007bb5;
    transform: scale(1.05);
}

#popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    display: none; /* Initially hidden */
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.popup-content {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    color: black;
}

/* Lifelines Box */
#lifelines {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 30px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s;
}

#lifelines:hover {
    transform: scale(1.05);
}

/* Centralized elements */
#landing-page,
#quiz-container,
#popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
/* Existing styles ... */

#landing-page {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 600px;
    margin: auto;
}

#start-btn, #restart-btn {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    background-color: #0095DD;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

#start-btn:hover, #restart-btn:hover {
    background-color: #007bb5;
    transform: scale(1.05);
}

#restart-message {
    display: none;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 600px;
    margin: auto;
}

.hide {
    display: none;
}

/* Popup */
#popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
}

.popup-content {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    color: black;
}

#popup-close-btn {
    margin-top: 10px;
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    background-color: #0095DD;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

#popup-close-btn:hover {
    background-color: #007bb5;
    transform: scale(1.05);
}

/* Highlight Correct and Wrong Answers */
.correct {
    background-color: rgba(76, 175, 80, 0.6);
}

.wrong {
    background-color: rgba(244, 67, 54, 0.6);
}