ttyd/html/css/app.css

body, #terminal-container {
    position: absolute;
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;
    font-size:15px;
    font-variant-ligatures: none;
    -webkit-font-smoothing: antialiased;
    background-color: #101010;
}

.terminal {
    background-color: #101010;
    color: #f0f0f0;
    font-family: "DejaVu Sans Mono","Everson Mono",FreeMono,Menlo,Terminal,monospace;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: auto;
    height: auto;
}

.terminal .xterm-viewport {
    background-color: #101010;
    overflow-x: hidden;
}

.terminal .terminal-cursor {
    background-color: #f0f0f0;
    color: #101010;
    opacity: .7;
}

.terminal:not(.focus) .terminal-cursor {
    outline: 1px solid #f0f0f0;
}

@keyframes blink-cursor {
    0% {
        background-color: #f0f0f0;
        color: #101010;
    }
    50% {
        background-color: transparent;
        color: #f0f0f0;
    }
}