html {
    font-size: 125%;
    font-family: Arial, Helvetica, sans-serif;
    background-color: maroon;
    color: white;
    text-align: center;
}

.hidden {
    display: none;
}

.menuOptions {
    display: flex;
    flex-direction: column;
    margin: 0px auto;
}

.row {
    flex: 1 1 auto;
    display: flex;
    flex-direction: row;
    justify-content: center;
}

button, input[type="submit"] {
    all: initial;
    font-family: inherit;
    margin: 0.5rem;
    padding: 0.5rem;
    font-weight: bold;
    font-size: 2rem;
    transition: 500ms background-color;
    text-align: center;
}

button:hover, input[type="submit"] {
    cursor: pointer;
}

button .mastered:hover {
    background-color: green;
}

.checkmark {
    height: 100%;
    width: 2rem;
}

.practiceBtn {
    background-color: rgb(147, 224, 255);
    width: 5rem;
}

.practiceBtn:hover {
    background-color: rgb(108, 166, 187);
}

.quizBtn {
    background-color: rgb(245, 234, 132);
}

.quizBtn:hover {
    background-color: rgb(206, 196, 110);
}

#finalBtn {
    background-color: rgb(255, 153, 0);
}

#finalBtn:hover {
    background-color: rgb(209, 125, 0);
}

#clearBtn, input[type="submit"] {
    background-color: rgb(230, 230, 230);
}

#clearBtn:hover, input[type="submit"] {
    background-color: rgb(189, 186, 186);
}

#question {
    font-size: 2rem;
}

#problemInp {
    font-size: 2rem;
    margin-top: 0.5rem;
}

#question {
    margin: 0px auto;
    background-color:rgba(255, 255, 255, 0.9);
    color: black;
    font-weight: bold;
    display: inline-block;
    padding: 1rem;
}

.questionWrapper {
    width: 100%;
}

#questionCounter, #timer {
    padding: 0.5rem;
    font-size: 1.5rem;
}