:root {
    --bg-primary: #f4f4f8;
    --bg-secondary: #ffffff;
    --text-primary: #2c3e50;
    --accent-blue: #3498db;
    --accent-green: #2ecc71;
    --feedback-correct: #d4edda;
    --feedback-wrong: #f8d7da;
}

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

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100dvh;
    line-height: 1.6;
}

.game-container {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    text-align: center;
}

h1 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.game-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
}

.button-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

.btn {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: 
        background-color 0.3s ease,
        transform 0.1s ease;
}

.btn:hover {
    opacity: 0.9;
}

.btn:active {
    transform: scale(0.95);
}

.ai-btn {
    background-color: var(--accent-blue);
    color: white;
}

.real-btn {
    background-color: var(--accent-green);
    color: white;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.feedback {
    margin: 1rem 0;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-weight: bold;
}

.feedback-correct {
    background-color: var(--feedback-correct);
    color: #155724;
}

.feedback-wrong {
    background-color: var(--feedback-wrong);
    color: #721c24;
}

.score {
    margin-top: 1rem;
    color: var(--text-primary);
    font-weight: bold;
}

.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.hidden {
    display: none;
}

@media (max-width: 480px) {
    .game-container {
        width: 95%;
        padding: 1rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}