body {
    font-family: 'Prompt', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    color: #333;
}


.quiz-card {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    padding: 24px;
    margin: 16px auto;
    max-width: 800px;
}

.quiz-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}


.option-card {
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 12px;
    background-color: #f9f9f9;
}

.option-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
    border-color: #667eea;
    background-color: #e6f0ff;
}

.option-card.selected {
    background-color: #667eea;
    color: white;
    border-color: #667eea;
}


.progress-bar {
    transition: width 0.5s ease;
    background-color: #667eea;
    height: 8px;
    border-radius: 4px;
}


.button {
    transition: all 0.3s ease;
    transform: translateY(0);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
}

.button:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.button:active {
    transform: translateY(0);
    box-shadow: none;
}


.animate-fade {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}


.loading-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
@keyframes slideIn {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}
.slide-in {
    animation: slideIn 0.5s ease-out;
}


.summary-item {
    transition: all 0.3s ease;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    background-color: #f9f9f9;
}

.summary-item:hover {
    transform: translateX(5px);
    background-color: #e6f0ff;
}

.incorrect-item {
    background-color: #ffe6e6;
    border-left: 4px solid #ff4d4d;
}

.incorrect-item:hover {
    transform: translateX(5px);
    transition: transform 0.3s ease;
}


::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}


#userPicture {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

#userPicture:hover {
    transform: scale(1.1);
}

#userName {
    font-size: 1.5rem;
    font-weight: 600;
    color: #444;
    margin-top: 12px;
}


@media (max-width: 768px) {
    .quiz-card {
        padding: 16px;
        margin: 8px;
    }

    .option-card {
        padding: 12px;
    }

    .button {
        padding: 10px 20px;
        font-size: 14px;
    }

    #userPicture {
        width: 80px;
        height: 80px;
    }

    #userName {
        font-size: 1.25rem;
    }
}
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1e3a8a 0%, #4c1d95 100%);
        color: #f3f4f6;
    }
    .quiz-card {
        background: rgba(0, 0, 0, 0.8);
        border-color: rgba(255, 255, 255, 0.1);
    }
    .option-card {
        background-color: #1f2937;
        color: #f3f4f6;
    }
    .option-card:hover {
        background-color: #374151;
    }
}

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-text {
    margin-top: 16px;
    font-size: 1.25rem;
    color: #333;
    font-weight: 500;
}


.hidden {
    display: none;
}
span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px; 
    height: 24px;
    border-radius: 50%;
    border: 2px solid #ccc;
    margin-right: 8px; 
    flex-shrink: 0; 
}