:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --bg-color: #e0f7fa;
    --text-color: #333;
    --card-bg: #ffffff;
    --wrong-color: #f44336;
    --correct-color: #4CAF50;
}

body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", "Trebuchet MS", Verdana, Arial, sans-serif;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--text-color);
}

.game-container {
    background-color: var(--card-bg);
    width: 100%;
    max-width: 600px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    padding: 20px;
    text-align: center;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px dashed #b2ebf2;
    padding-bottom: 15px;
    margin-bottom: 20px;
}

h1 {
    font-family: cursive;
    color: var(--secondary-color);
    margin: 0;
    font-size: 24px;
}

.score-board {
    font-weight: 700;
    font-size: 18px;
    background-color: #fff9c4;
    padding: 5px 15px;
    border-radius: 20px;
    border: 2px solid #fbc02d;
}

.level-info {
    background-color: var(--secondary-color);
    color: white;
    display: inline-block;
    padding: 5px 15px;
    border-radius: 15px;
    font-weight: bold;
    margin-bottom: 20px;
}

.question-container h2 {
    font-size: 22px;
    margin-bottom: 20px;
}

.sign-display {
    background-color: #f5f5f5;
    border: 4px solid #e0e0e0;
    border-radius: 15px;
    width: 200px;
    height: 200px;
    margin: 0 auto 30px auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.05);
}

.placeholder-sign {
    font-size: 80px;
}

.placeholder-text {
    font-size: 12px;
    color: #888;
    margin-top: 10px;
    font-weight: bold;
}

.options-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.option-btn {
    font-family: cursive;
    font-size: 32px;
    width: 80px;
    height: 80px;
    border: none;
    border-radius: 15px;
    background-color: var(--secondary-color);
    color: white;
    cursor: pointer;
    transition: transform 0.1s, background-color 0.2s;
    box-shadow: 0 5px 0 #1565C0;
}

.option-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 0 #1565C0;
}

.option-btn:active {
    transform: translateY(3px);
    box-shadow: 0 2px 0 #1565C0;
}

.option-btn.correct {
    background-color: var(--correct-color);
    box-shadow: 0 5px 0 #2E7D32;
}

.option-btn.wrong {
    background-color: var(--wrong-color);
    box-shadow: 0 5px 0 #C62828;
}

.feedback-message {
    margin-top: 20px;
    font-size: 20px;
    font-weight: bold;
    min-height: 30px;
}

.feedback-correct {
    color: var(--correct-color);
}

.feedback-wrong {
    color: var(--wrong-color);
}

.aviso-prototipo {
    display: inline-block;
    margin: 0 0 16px;
    padding: 8px 16px;
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 12px;
    color: #7a5b00;
    font-size: 12px;
    font-weight: 700;
    max-width: 100%;
}