body {
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
}

#game-container {
    width: 600px;
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

#game-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 20px;
}

#game-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

#target-text {
    font-size: 24px;
    text-align: center;
    padding: 20px;
    background-color: #f8f8f8;
    border-radius: 5px;
}

#input-area {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#regex-input {
    padding: 10px;
    font-size: 18px;
    border: 2px solid #ddd;
    border-radius: 5px;
}

#feedback {
    text-align: center;
    min-height: 24px;
}

.correct {
    color: #2ecc71;
}

.incorrect {
    color: #e74c3c;
}

#help-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    text-align: center;
}

#help-section a {
    color: #3498db;
    text-decoration: none;
    font-weight: bold;
}

#help-section a:hover {
    text-decoration: underline;
}