#bonus-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 50, 0.95);
    z-index: 10000;
    color: white;
}

.bonus-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 90%;
    max-width: 800px;
}

.bonus-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #ffc107;
}

.bonus-content h3 {
    font-size: 24px;
    margin-bottom: 30px;
}

#bonus-word {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 40px auto;
}

.bonus-letter {
    width: 60px;
    height: 70px;
    background: #333;
    border: 3px solid #666;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    font-weight: bold;
    color: white;
    transition: all 0.5s ease;
}

.bonus-letter.bonus-correct {
    background: #28a745;
    border-color: #20c997;
}

.bonus-letter.bonus-swap {
    animation: swap 0.6s ease;
}

@keyframes swap {
    0% {
        transform: translateY(0) scale(1);
        background: #333;
    }
    25% {
        transform: translateY(-20px) scale(1.15);
        background: #ffc107;
        border-color: #ffca2c;
    }
    50% {
        transform: translateY(-30px) scale(1.2);
        background: #ffc107;
        border-color: #ffca2c;
    }
    75% {
        transform: translateY(-20px) scale(1.15);
        background: #ffc107;
        border-color: #ffca2c;
    }
    100% {
        transform: translateY(0) scale(1);
        background: #333;
    }
}

#bonus-input-container {
    display: none;
    margin-top: 40px;
}

#bonus-input-container p {
    font-size: 20px;
    margin-bottom: 15px;
    color: #ffc107;
}

#bonus-guess-input {
    font-size: 24px;
    padding: 10px 20px;
    width: 300px;
    text-align: center;
    border: 3px solid #007bff;
    border-radius: 5px;
    text-transform: uppercase;
    margin: 10px;
}

#bonus-submit-btn {
    font-size: 20px;
    padding: 10px 30px;
}

.bonus-instructions {
    margin-top: 30px;
    font-size: 18px;
    color: #aaa;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .bonus-content h2 {
        font-size: 24px;
    }

    .bonus-content h3 {
        font-size: 18px;
    }

    .bonus-letter {
        width: 40px;
        height: 50px;
        font-size: 28px;
    }

    #bonus-word {
        gap: 5px;
    }

    #bonus-guess-input {
        width: 250px;
        font-size: 20px;
    }
}