body {
    background: grey;
    color: #33ff33;
    font-family: "Courier New", monospace;
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

span {
    font-style: italic;
}

#computer-case {
    position: relative;
    width: 500px;
    height: 400px;
    background: #222;
    border: 10px solid black;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 20px black;
    z-index: 10;
}

#screen {
    width: 80%;
    border: 2px solid #33ff33;
    padding: 20px;
    box-shadow: 0 0 20px #0f0;
}

#output {
    margin-bottom: 20px;
    white-space: pre-wrap;
}

#input-line {
    display: flex;
    align-items: center;
}

#prompt {
    margin-right: 5px;
    font-style: normal;
}

#user-input {
    background: transparent;
    border: none;
    outline: none;
    color: #33ff33;
    font-family: inherit;
    font-size: 1rem;
    width: 1ch;
    caret-color: transparent;
}

#cursor {
    display: inline-block;
    width: 0.55rem;
    height: 1.2rem;
    background: #33ff33;
    animation: blink 0.8s step-end infinite;
}

#screen-holder,
#screen-footer {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

#screen-holder {
    height: 10%;
    width: 4%;
    top: 66.3%;
    background-color: #1a1a1a;
    border: 2px solid black;
    border-top: none;
    border-radius: 0 0 8px 8px;
}

#screen-footer {
    height: 10px;
    width: 20%;
    bottom: 23%;
    background-color: #111;
    border: 2px solid black;
    border-radius: 4px;
}

@keyframes blink {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}