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

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.game-container {
    background: white;
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    max-width: 400px;
    width: 100%;
}

h1 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.8em;
}

p {
    color: #555;
    margin: 10px 0;
    font-size: 1.1em;
}

#score {
    font-weight: bold;
    color: #667eea;
    font-size: 1.4em;
}

.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 15px 30px;
    margin: 10px 5px 10px 0;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #f0f0f0;
    color: #555;
}

.btn-secondary:hover:not(:disabled) {
    background: #e0e0e0;
}

.btn-primary:disabled, .btn-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@media (max-width: 480px) {
    .game-container {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.5em;
    }
    
    p {
        font-size: 1em;
    }
}