/* Retro Terminal. Change the phosphor color here. */
:root {
  --bg: #050805;
  --screen: #071107;
  --green: #4dff88;
  --green-dim: #2fae5c;
  --amber: #ffcc4d;
  --line: #133d1f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse at center, #0b1a0d, var(--bg) 70%);
  color: var(--green);
  font: 16px/1.6 ui-monospace, "SFMono-Regular", "Cascadia Mono", "DejaVu Sans Mono", Menlo, Consolas, monospace;
}

a { color: var(--green); }
:focus-visible { outline: 2px dashed var(--green); outline-offset: 3px; }

.crt { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100vh; padding: 32px 16px; }

.window {
  position: relative;
  width: min(820px, 100%);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--screen);
  box-shadow: 0 0 0 1px #000, 0 0 60px rgb(77 255 136 / 0.12), 0 30px 80px rgb(0 0 0 / 0.6);
  overflow: hidden;
}

/* scanlines + vignette on top of everything */
.window::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgb(0 0 0 / 0.22) 0 1px, transparent 1px 3px),
    radial-gradient(ellipse at center, transparent 60%, rgb(0 0 0 / 0.45));
  animation: flicker 6s infinite;
}

.titlebar { display: flex; align-items: center; gap: 8px; padding: 10px 14px; border-bottom: 1px solid var(--line); background: #0a170b; }
.titlebar span { width: 11px; height: 11px; border-radius: 50%; background: var(--line); }
.titlebar p { margin: 0 0 0 8px; color: var(--green-dim); font-size: 0.8rem; }

.screen { padding: clamp(18px, 4vw, 32px); min-height: 440px; text-shadow: 0 0 6px rgb(77 255 136 / 0.55); }

.source, .output { margin: 0; font: inherit; white-space: pre-wrap; word-break: break-word; }

/* With JS, hide the plain copy visually but keep it for screen readers. */
.js .source {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.output { display: none; }
.js .output { display: block; }

.line { min-height: 1.6em; }
.cmd { color: #b6ffcf; }
.ok { color: var(--green); }
.wait { color: var(--amber); text-shadow: 0 0 6px rgb(255 204 77 / 0.5); }
.typing::after, .done .line:last-child::after {
  content: "";
  display: inline-block;
  width: 0.6em;
  height: 1.1em;
  margin-left: 2px;
  vertical-align: text-bottom;
  background: var(--green);
  animation: blink 1s steps(1) infinite;
}

.prompt { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 24px; }
.js .prompt { visibility: hidden; }
.js .prompt.ready { visibility: visible; animation: appear 0.3s steps(3) both; }
.prompt label { color: #b6ffcf; }
.prompt input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 6px 0;
  border: 0;
  border-bottom: 1px dashed var(--green-dim);
  background: transparent;
  color: var(--green);
  font: inherit;
  caret-color: var(--green);
  text-shadow: inherit;
}
.prompt input::placeholder { color: var(--green-dim); opacity: 0.8; }
.prompt input:focus-visible { outline: none; border-bottom-style: solid; border-bottom-color: var(--green); }
.prompt button {
  padding: 6px 12px;
  border: 1px solid var(--green);
  background: transparent;
  color: var(--green);
  font: inherit;
  cursor: pointer;
  text-shadow: inherit;
}
.prompt button:hover, .prompt button:focus-visible { background: var(--green); color: var(--screen); text-shadow: none; }

.reply { min-height: 1.6em; margin: 14px 0 0; }

.foot { margin: 20px 0 0; color: var(--green-dim); font-size: 0.82rem; text-align: center; }

@keyframes blink { 50% { opacity: 0; } }
@keyframes flicker { 0%, 96%, 100% { opacity: 1; } 97% { opacity: 0.85; } 98% { opacity: 1; } 99% { opacity: 0.9; } }
@keyframes appear { from { opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
  .window::after, .typing::after, .js .prompt.ready { animation: none; }
}