body {
    background-color: #2c3e50;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #fff;
    transition: background-image 0.5s ease-in-out;
}

.game-container {
    max-width: 500px;
    margin: 100px auto;
    padding: 30px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 2px solid #1abc9c;
    border-radius: 15px;
    box-shadow: 0 0 15px rgba(0,0,0,0.3);
    text-align: center;
}

h2 {
    margin-bottom: 20px;
    font-size: 2em;
}

.input-section h3 {
    margin-bottom: 10px;
}

.user-guess {
    height: 30px;
    font-size: 16px;
    padding: 5px;
    width: 80%;
    margin-bottom: 10px;
}

button {
    height: 35px;
    width: 120px;
    background-color: #1abc9c;
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #16a085;
}

.extra-options {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 15px;
}

.message {
    font-size: 18px;
    font-weight: bold;
    margin-top: 15px;
}

.hidden {
    display: none;
}