body {
    font-family: Arial, sans-serif;
    background-color: gray;
    text-align: center;
    display: flex;
    justify-content: center;
}

h1 {
    color: darkblue;
    text-align: center;
    display: flex;
    justify-content: center;
}

.right-column, .left-column {
    background-color: white;
    padding: 10px;
    border: 1px solid black;
    margin: 10px;
    height: auto;

}

button {
    background-color: lightblue;
    border: 1px solid darkblue;
    padding: 5px;
    margin-top: 5px;
}

input, select {
    margin-top: 5px;
    padding: 3px;
    border: 1px solid black;
}

#flashcard {
    border: 5px solid black;
    padding: 10px;
    margin-top: 10px;
    width: 600px;
    height: auto;
    text-align: center;
    background-color: lightsteelblue;
    border-radius: 30px;
}

.box{
    display: flex;
    justify-content: center;
}

#questionNumber{
    color: indianred;
}

#question{
    color: coral;
    text-decoration: underline;
}

#FullName{
    color: dimgray;
    text-shadow: 100% black;
}

#rightAnswers{
    color: green;
}

#wrongAnswers{
    color: red;
}

#percent{
    color: blue;
}

#timeTaken{
    color: goldenrod;
}

#testScore{
    display: none;
    border: 1px solid black;
    padding: 10px;
    margin-top: 10px;
    width: 600px;
    height: auto;
    text-align: center;
    background-color: whitesmoke;
    border-radius: 10px;
}

#progress-container {
    width: 80%;
    background-color: #ddd;
    border-radius: 5px;
    margin: 20px auto;
    height: 25px;
}

#progress-bar {
    height: 100%;
    width: 0%;
    background-color: rgb(255, 0, 0);
    border-radius: 5px;
    text-align: center;
    color: white;
    line-height: 25px;
    font-weight: bold;
    transition: width 0.5s ease-in-out, background-color 1s linear;
}

.shake {
    animation: shake 0.5s;
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
}