.quiz-main {
    padding: 24px 0 48px;
}

.quiz-back-link {
    margin: 0 0 16px;
    font-size: 0.88rem;
}

.quiz-back-link a {
    color: var(--blue, #026AB0);
    text-decoration: none;
    font-weight: 500;
}

.quiz-back-link a:hover {
    text-decoration: underline;
}

.quiz-header .back-link {
    margin: 4px 0 0;
    font-size: 0.88rem;
    width: 100%;
}

.quiz-header .back-link a {
    color: var(--yellow);
    text-decoration: none;
    font-weight: 500;
}

.quiz-header .back-link a:hover {
    text-decoration: underline;
}

.scoreboard {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.score-box {
    background-color: var(--blue-dark);
    color: var(--yellow);
    padding: 0.75rem 1.25rem;
    border-radius: 10px;
    text-align: center;
    min-width: 110px;
    box-shadow: 0 2px 8px rgba(1, 80, 138, 0.25);
    border: 2px solid var(--blue);
}

.score-label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.8);
    font-weight: 600;
}

.score-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    font-family: 'Inter', 'Courier New', monospace;
}

.quiz-stage {
    background-color: var(--white);
    border-radius: 10px;
    padding: 2rem 1.75rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    max-width: 780px;
    margin: 0 auto;
    min-height: 360px;
    border-top: 5px solid var(--yellow);
}

.screen {
    display: none;
    animation: fade-in 0.35s ease;
}

.screen.active {
    display: block;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

#intro-screen,
#end-screen {
    text-align: center;
}

#intro-screen h2,
#end-screen h2 {
    font-size: 1.65rem;
    margin-top: 0;
    color: var(--blue-dark);
    border: none;
    display: block;
    padding-bottom: 0;
}

#intro-screen p,
#end-screen p {
    margin: 0.5rem 0;
    color: var(--text-dark);
}

.big-btn {
    background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
    color: white;
    border: none;
    padding: 0.9rem 2rem;
    border-radius: 50px;
    font-size: 1.02rem;
    font-weight: 700;
    cursor: pointer;
    margin-top: 1rem;
    box-shadow: 0 4px 12px rgba(2, 106, 176, 0.3);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    font-family: inherit;
}

.big-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(2, 106, 176, 0.4);
}

.big-btn:active {
    transform: translateY(0);
}

.question-card h2 {
    font-size: 1.3rem;
    line-height: 1.4;
    margin-top: 0;
    color: var(--text-dark);
    border: none;
    padding-bottom: 0;
    display: block;
    font-weight: 600;
}

.choices {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 1.25rem;
}

.choice-btn {
    background-color: var(--light-bg);
    border: 2px solid var(--border);
    padding: 0.9rem 1.1rem;
    border-radius: 8px;
    font-size: 1rem;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
    font-family: inherit;
    color: var(--text-dark);
}

.choice-btn:hover:not(:disabled) {
    background-color: #e3eff9;
    border-color: var(--blue);
    transform: translateX(3px);
}

.choice-btn:disabled {
    cursor: default;
}

.choice-btn.correct {
    background-color: #d4edda;
    border-color: #28a745;
    color: #155724;
    font-weight: 600;
}

.choice-btn.incorrect {
    background-color: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}

.choice-btn.faded {
    opacity: 0.55;
}

.feedback {
    margin-top: 1.25rem;
    padding: 1rem 1.25rem;
    border-radius: 8px;
    background-color: #fff8e1;
    border-left: 5px solid var(--yellow);
    animation: fade-in 0.3s ease;
}

.feedback.correct {
    background-color: #e8f7ec;
    border-left-color: #28a745;
}

.feedback.incorrect {
    background-color: #fdecee;
    border-left-color: #dc3545;
}

.feedback-headline {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 0.35rem;
    color: var(--blue-dark);
}

.feedback.correct .feedback-headline {
    color: #1e7e34;
}

.feedback.incorrect .feedback-headline {
    color: #a71d2a;
}

.feedback-explanation {
    margin: 0 0 1rem;
    color: var(--text-dark);
    line-height: 1.5;
}

.final-score {
    font-size: 1.25rem;
    margin: 1.5rem 0;
    color: var(--text-dark);
}

.final-score strong {
    color: var(--blue);
    font-size: 1.85rem;
}

#end-screen .back-link {
    margin-top: 1.25rem;
}

#end-screen .back-link a {
    color: var(--blue);
    text-decoration: none;
    font-weight: 600;
}

#end-screen .back-link a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .quiz-stage {
        padding: 1.25rem 1rem;
    }

    .question-card h2 {
        font-size: 1.1rem;
    }

    .score-box {
        min-width: 90px;
        padding: 0.55rem 0.85rem;
    }

    .score-value {
        font-size: 1.4rem;
    }
}