body {
    font-family: barlow, sans-serif;
    text-align: center;
}

#game-container {
    margin: 0 auto;
    max-width: 500px;
}

#target-number {
    font-size: 2rem;
    margin-bottom: 1rem;
}

#numbers {
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}

#numbers span {
    font-size: 1.5rem;
    padding: 0.5rem 1rem;
    margin: 0.25rem;
    background-color: #eee;
    border: 1px solid #ccc;
    cursor: pointer;
}

#expression {
    font-size: 1.5rem;
    margin-top: 1rem;
}

#operations button {
    font-family: barlow, sans-serif;
    font-size: 1.5rem;
    padding: 0.5rem 1rem;
    margin: 0.25rem;
}

#timer {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

#input-field {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.hidden {
    display: none;
}