/* System font stack: zero font downloads, so nothing leaks to a font CDN.
   The Korvet's own ROM glyphs would need a self-hosted @font-face, which the
   CSP blocks outright -- there is no font-src, so it falls back to
   default-src 'none'. Block characters in the system monospace stack get the
   look without touching that header. */
:root {
  --bg: #fdfdfc;
  --fg: #23221f;
  --muted: #6b6862;
  --accent: #2f5d8a;
  --rule: #e3e1dc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16151a;
    --fg: #e8e6e1;
    --muted: #9a968e;
    --accent: #8fb4d9;
    --rule: #2b2a30;
  }
}

/* The screen itself is dark in both colour schemes. A CRT has no light mode,
   and a fixed palette is also what keeps the contrast ratios below provably
   AA rather than dependent on which theme the visitor happens to be in. */
:root {
  --crt-bg: #0b1410;
  --crt-fg: #7bf7ad;    /* 13.9:1 on --crt-bg */
  --crt-dim: #5bbd8a;   /*  8.1:1 on --crt-bg */
  --crt-hot: #ffd479;   /* 12.6:1 on --crt-bg */
  --crt-rule: #23503c;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono",
          "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 3rem 1.25rem;
  background: var(--bg);
  color: var(--fg);
  font: 1rem/1.65 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.crt { max-width: 34rem; margin: 0 auto; }

.screen {
  position: relative;
  padding: 1.6rem 1.4rem 1.4rem;
  border-radius: 10px;
  background: var(--crt-bg);
  color: var(--crt-fg);
  font-family: var(--mono);
  font-size: .9rem;
  line-height: 1.6;
  box-shadow: 0 0 0 1px var(--crt-rule), 0 18px 48px -24px rgba(0, 0, 0, .8);
}

/* Scanlines. Kept faint on purpose: heavy enough to read as a CRT, light
   enough that it does not eat into the contrast ratios above. */
.screen::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  border-radius: inherit;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, .10) 0 1px,
    rgba(0, 0, 0, 0) 1px 3px
  );
}

.statusline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 1.6rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--crt-rule);
  color: var(--crt-dim);
  font-size: .7rem;
  letter-spacing: .1em;
}

.wordmark {
  margin: 0;
  overflow: hidden;
  color: var(--crt-fg);
  font-size: clamp(.55rem, 4.4vw, 1.15rem);
  line-height: 1.04;
  text-shadow: 0 0 14px rgba(123, 247, 173, .45);
}

.cartridge {
  margin: .9rem 0 0;
  color: var(--crt-dim);
  font-size: .78rem;
  letter-spacing: .34em;
}

hr {
  height: 0;
  margin: 1.6rem 0;
  border: 0;
  border-top: 1px dashed var(--crt-rule);
}

h1 {
  margin: 0 0 .4rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: lowercase;
}

h2 {
  margin: 1.9rem 0 .3rem;
  color: var(--crt-dim);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h2::before { content: "> "; }

p { margin: 0 0 .9rem; }
.lede { margin: 0; color: var(--crt-dim); }

.links { margin: 0; padding: 0; list-style: none; }
.links li { margin-bottom: .2rem; }
.links li::before { content: "  * "; color: var(--crt-dim); }

a {
  color: var(--crt-hot);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { text-decoration-thickness: 2px; }

/* Visible keyboard focus: accessibility, and it costs nothing. */
a:focus-visible {
  outline: 2px solid var(--crt-hot);
  outline-offset: 3px;
  border-radius: 2px;
}

.prompt {
  margin: 2rem 0 0;
  color: var(--crt-dim);
  font-size: .8rem;
}

.caret {
  display: inline-block;
  width: .58em;
  height: 1.05em;
  margin-left: .45em;
  vertical-align: -.18em;
  background: var(--crt-fg);
  animation: blink 1.2s steps(1) infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; }
}

footer {
  margin-top: 2.2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--crt-rule);
  color: var(--crt-dim);
  font-size: .72rem;
}
footer p { margin: 0; }
.origin { margin: 0 0 .7rem; opacity: .85; }
.origin i { font-style: italic; }