body {
    margin: 0;
    padding: 0;
    background-color: #181818;
    color: #ffffff;
    height: 100vh;
    font-family: monospace;
    font-size: 1.5rem;
}

#header {
    font-family: "Pixelify Sans", sans-serif;
    display: flex;
    flex-direction: column;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

#welcome {
    font-size: 2em;
    text-align: center;
    margin-top: 20px;
}

#underground {
    font-size: 2.5rem;
    text-align: center;
    margin-top: 10px;
    color: #ffcc00;
}

#subtitle {
    font-size: 1.2rem;
    text-align: center;
    color: #fff;
}

#main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 2rem;
}

.level-tag {
    font-weight: bold;
    color: #ffcc00;
}

button {
    padding: 0.25rem 0.5rem;
    font-family: inherit;
    font-weight: bold;
    font-size: inherit;
    background-color: transparent;
    border: 2px solid #009dff;
    border-radius: 8px;
    color: #009dff;
}

button:disabled {
    filter: grayscale();
}

input {
    padding: 0.25rem 0.5rem;
    font-family: inherit;
    font-size: inherit;
    border: 2px solid #009dff;
    border-radius: 8px;
    color: #ffffff;
    background-color: transparent;
}

form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}