body {
    font-family: 'Felix Titling', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #000000;
    background-image: url('https://images.unsplash.com/photo-1462331940025-496dfbfc7564?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-attachment: fixed;
    color: #C5C6C7;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: rgba(13, 27, 42, 0.8);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(77, 168, 218, 0.3);
}

.center-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

h1, h2 {
    text-align: center;
    color: #4DA8DA;
}

input, button {
    display: block;
    width: 100%;
    margin: 10px 0;
    padding: 10px;
    border: none;
    border-radius: 5px;
    background-color: #0D1B2A;
    color: #C5C6C7;
    font-family: 'Felix Titling', Arial, sans-serif;
}

button {
    background-color: #53354A;
    color: #C5C6C7;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}

button:hover {
    background-color: #4DA8DA;
    transform: scale(1.05);
}

.language-selection {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.language-card {
    background-color: rgba(195, 196, 199, 0.1);
    border-radius: 10px;
    padding: 20px;
    margin: 10px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.language-card:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(77, 168, 218, 0.5);
}

.language-card img {
    width: 100px;
    height: 100px;
}

#quiz-content {
    margin-bottom: 20px;
}

.hidden {
    display: none;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid #53354A;
}

th {
    background-color: #53354A;
    color: #C5C6C7;
}

a {
    color: #4DA8DA;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

pre {
    background-color: #0D1B2A;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

code {
    font-family: 'Courier New', Courier, monospace;
    color: #4DA8DA;
}

#feedback {
    padding: 10px;
    margin: 10px 0;
    border-radius: 5px;
    text-align: center;
}

#feedback.correct {
    background-color: rgba(0, 255, 0, 0.2);
    color: #00ff00;
}

#feedback.incorrect {
    background-color: rgba(255, 0, 0, 0.2);
    color: #ff0000;
}