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

.container {
    text-align: center;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 80%;
    max-width: 600px;
}

header, footer {
    width: 100%;
}

header p {
    font-size: 14px;
    margin: 0;
}

footer {
    margin-top: 20px;
}

footer button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    text-decoration: none;
}

footer button:hover {
    background-color: #0056b3;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}

#progressContainer {
    margin-top: 20px;
    position: relative;
    width: 100%;
    height: 30px;
    background-color: #e0e0e0;
    border-radius: 15px;
}

#progressBar {
    height: 100%;
    width: 0%;
    background-color: #76c7c0;
    border-radius: 15px;
    transition: width 0.3s;
}

#progressText {
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
    line-height: 30px;
    text-align: center;
    font-weight: bold;
}

.hidden {
    display: none;
}

#keyContainer {
    margin-top: 20px;
}