:root {
    --hue: 200;
    --saturation: 50%;
    --foreground-color: hsl(var(--hue), var(--saturation), 10%);
    --background-color: hsl(var(--hue), var(--saturation), 90%);
    --correct-color: hsl(120, 80%, 40%);
    --wrong-color: hsl(0, 80%, 50%);
}

body {
    padding: 0;
    margin: 0;
    display: flex;
    width: 100vw;
    height: 100vh;
    justify-content: center;
    align-items: center;
    background-color: var(--background-color);
    font-family: Arial, sans-serif;
}

#quiz-container {
    width: 800px;
    max-width: 80%;
    background-color: white;
    border-radius: 5px;
    padding: 20px;
    box-shadow: 0 0 10px 2px rgba(0, 0, 0, 0.1);
}

.btn-grid {
    display: grid;
    grid-template-columns: repeat(2, auto);
    gap: 10px;
    margin: 20px 0;
}

.btn {
    border: 1px solid hsl(var(--hue), var(--saturation), 30%);
    background-color: hsl(var(--hue), var(--saturation), 50%);
    border-radius: 5px;
    padding: 10px 15px;
    color: white;
    outline: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    border-color: black;
}

.btn.correct {
    background-color: var(--correct-color);
    color: white;
}

.btn.wrong {
    background-color: var(--wrong-color);
    color: white;
}

.start-btn, .next-btn, .restart-btn {
    font-size: 1.2rem;
    font-weight: bold;
    padding: 10px 20px;
}

#controls {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hide {
    display: none;
}