* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1e3a8a 0%, #6b21a8 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
    /* Reduzido para mobile */
}

.quiz-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    padding: 30px;
    max-width: 500px;
    width: 100%;
    transition: all 0.3s ease;
}

.quiz-header {
    text-align: center;
    margin-bottom: 25px;
}

.quiz-title {
    font-size: 28px;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 15px;
}

.quiz-stats {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    /* Permite quebra de linha em mobile */
}

.stat-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.question-count {
    background-color: #e0e7ff;
    color: #3730a3;
}

.score-count {
    background-color: #d1fae5;
    color: #065f46;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #e5e7eb;
    border-radius: 4px;
    margin-bottom: 25px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: #3b82f6;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.question-text {
    font-size: 18px;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 20px;
    line-height: 1.5;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 25px;
}

.option-btn {
    padding: 16px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    background-color: #f8fafc;
    color: #374151;
    font-size: 16px;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 48px;
    /* Altura mínima para toques em mobile */
    display: flex;
    align-items: center;
}

.option-btn:hover:not(:disabled) {
    background-color: #e0e7ff;
    border-color: #3b82f6;
}

.option-btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.option-btn.correct {
    background-color: #10b981;
    color: white;
    border-color: #10b981;
}

.option-btn.incorrect {
    background-color: #ef4444;
    color: white;
    border-color: #ef4444;
}

.explanation-box {
    background-color: #f1f5f9;
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 20px;
    border-left: 4px solid #3b82f6;
}

.explanation-text {
    font-size: 14px;
    color: #4b5563;
    line-height: 1.5;
}

.explanation-text strong {
    color: #1f2937;
}

.next-btn {
    width: 100%;
    padding: 14px;
    background-color: #3b82f6;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-top: 10px;
    min-height: 48px;
    /* Altura mínima para toques */
    display: flex;
    align-items: center;
    justify-content: center;
}

.next-btn:hover {
    background-color: #2563eb;
}

.next-btn:disabled {
    background-color: #9ca3af;
    cursor: not-allowed;
}

.results-container {
    text-align: center;
}

.results-icon {
    width: 80px;
    height: 80px;
    background-color: #10b981;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
    font-weight: bold;
    color: white;
}

.results-title {
    font-size: 24px;
    font-weight: bold;
    color: #1f2937;
    margin-bottom: 10px;
}

.results-score {
    font-size: 18px;
    color: #6b7280;
    margin-bottom: 20px;
}

.results-progress {
    width: 100%;
    height: 12px;
    background-color: #e5e7eb;
    border-radius: 6px;
    margin-bottom: 10px;
    overflow: hidden;
}

.results-progress-fill {
    height: 100%;
    background-color: #3b82f6;
    border-radius: 6px;
    transition: width 1s ease;
}

.results-percentage {
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 25px;
}

.restart-btn {
    width: 100%;
    padding: 16px;
    background-color: #3b82f6;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
    min-height: 48px;
    /* Altura mínima para toques */
    display: flex;
    align-items: center;
    justify-content: center;
}

.restart-btn:hover {
    background-color: #2563eb;
}

/* Tablet e Celulares Maiores (até 768px) */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }

    .quiz-container {
        padding: 25px;
        border-radius: 16px;
        margin: 0 10px;
    }

    .quiz-title {
        font-size: 24px;
    }

    .quiz-stats {
        gap: 8px;
        justify-content: center;
    }

    .stat-badge {
        font-size: 13px;
        padding: 5px 10px;
    }

    .question-text {
        font-size: 16px;
        margin-bottom: 18px;
    }

    .options-container {
        gap: 10px;
    }

    .option-btn {
        padding: 14px;
        font-size: 15px;
    }

    .explanation-box {
        padding: 14px;
    }

    .explanation-text {
        font-size: 13px;
    }

    .next-btn {
        padding: 12px;
        font-size: 15px;
    }

    .results-icon {
        width: 70px;
        height: 70px;
        font-size: 28px;
    }

    .results-title {
        font-size: 22px;
    }

    .results-score {
        font-size: 16px;
    }
}

/* Celulares Pequenos (até 480px) */
@media (max-width: 480px) {
    body {
        padding: 5px;
        /* Mínimo para telas muito pequenas */
        align-items: center;
        /* Começa do topo para evitar scroll excessivo */
        padding-top: 20px;
    }

    .quiz-container {
        padding: 20px;
        border-radius: 12px;
        margin: 0 5px;
        max-width: none;
        /* Usa toda a largura disponível */
    }

    .quiz-title {
        font-size: 22px;
        margin-bottom: 12px;
    }

    .quiz-stats {
        gap: 6px;
        flex-direction: column;
        /* Empilha em coluna para telas muito pequenas */
        align-items: center;
    }

    .stat-badge {
        font-size: 12px;
        padding: 4px 8px;
        width: auto;
    }

    .progress-bar {
        height: 6px;
        margin-bottom: 20px;
    }

    .question-text {
        font-size: 15px;
        margin-bottom: 15px;
        line-height: 1.4;
    }

    .options-container {
        gap: 8px;
        margin-bottom: 20px;
    }

    .option-btn {
        padding: 12px;
        font-size: 14px;
        min-height: 44px;
        /* Mínimo para toques */
    }

    .explanation-box {
        padding: 12px;
        margin-bottom: 15px;
    }

    .explanation-text {
        font-size: 12px;
        line-height: 1.4;
    }

    .next-btn {
        padding: 12px;
        font-size: 14px;
        min-height: 44px;
    }

    .results-icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
        margin-bottom: 15px;
    }

    .results-title {
        font-size: 20px;
        margin-bottom: 8px;
    }

    .results-score {
        font-size: 15px;
        margin-bottom: 15px;
    }

    .results-progress {
        height: 10px;
        margin-bottom: 8px;
    }

    .results-percentage {
        font-size: 13px;
        margin-bottom: 20px;
    }

    .restart-btn {
        padding: 14px;
        font-size: 14px;
        min-height: 44px;
    }
}

/* Orientação landscape em mobile (opcional, para telas largas mas baixas) */
@media (max-height: 500px) and (orientation: landscape) {
    body {
        align-items: flex-start;
        padding-top: 10px;
    }

    .quiz-container {
        padding: 15px;
        margin: 5px;
    }

    .quiz-title {
        font-size: 20px;
    }

    .question-text {
        font-size: 14px;
    }

    .option-btn {
        padding: 10px;
        font-size: 13px;
    }
}

.question-image {
    width: 100%;
    max-width: 380px; /* Tamanho ótimo */
    display: block;
    margin: 15px auto;
    border-radius: 10px;
    background: #f0f0f0;
    padding: 5px;
}