@font-face {
  font-family: "LEKLONN At Glyph";
  src: url("./fonts/LEKLONNAtGlyph.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  unicode-range: U+0040;
}

@font-face {
  font-family: "IBM CGA Thin";
  src: url("./fonts/WebPlus_IBM_CGAthin.woff") format("woff");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  background: #151618;
}

body, h1, p {
  margin: 0;
}

.crt {
  --gutter: 24px;
  --ink: #c8cfd2;
  --bloom: rgba(196, 218, 237, .32);
  /* Set to 0 to disable the colored shadow and restore the neutral glow. */
  --crt-fringe-opacity: .3;
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100svh;
  padding: 24px var(--gutter) 12px;
  background: #1a1b1d radial-gradient(ellipse at 40% 36%, #292b2e, #202124 57%, #141517 100%);
  color: var(--ink);
  font: 16px / 1.65 "LEKLONN At Glyph", "IBM CGA Thin", monospace;
  font-synthesis: none;
  text-shadow:
    0 0 5px rgba(196, 218, 237, .1),
    1.3px .3px .5px rgba(255, 151, 188, calc(var(--crt-fringe-opacity) * 1.25)),
    -1.3px .2px .5px rgba(128, 211, 255, var(--crt-fringe-opacity)),
    .2px 1.1px .6px rgba(255, 224, 150, var(--crt-fringe-opacity));
  overflow-wrap: anywhere;
}

.crt::before, .crt::after {
  position: fixed;
  z-index: 1;
  inset: 0;
  pointer-events: none;
  content: "";
}

.crt::before {
  background-image: radial-gradient(ellipse 1.1px 1.35px at center,
    rgba(205, 219, 229, .07) 12%, rgba(183, 199, 212, .035) 45%, rgba(0, 0, 0, .1) 90%);
  background-size: 3px 4px;
  animation: surface-brightness 7.1s linear infinite;
}

.crt::after {
  inset: -12px;
  background-image: url("./grain.svg");
  opacity: .75;
  animation: surface-noise 1.43s steps(1, end) infinite;
}

.terminal {
  --wrapped-padding: .23em;
  inline-size: 100%;
}

.terminal header, .standby, .response {
  inline-size: min(100%, 46ch);
}

.crt-sync-definitions {
  position: absolute;
  inline-size: 0;
  block-size: 0;
  overflow: hidden;
  pointer-events: none;
}

.system-line {
  display: block;
}

h1 {
  font: inherit;
}

h1, .system-line, .standby, .prompt, .response {
  line-height: 1.19;
  padding-block: var(--wrapped-padding);
}

.telemetry {
  margin-block-start: 1lh;
}

.standby {
  margin-block: 1.65em;
}

.console {
  display: grid;
}

.prompt, .response {
  grid-area: 1 / 1;
}

.prompt {
  --prompt-indent: 1.25ch;
  position: relative;
  min-block-size: 1.4em;
}

.prompt-mark {
  position: absolute;
  z-index: 1;
  inset-block-start: var(--wrapped-padding);
  inset-inline-start: 0;
  cursor: text;
}

.entry {
  position: relative;
  min-inline-size: 0;
}

.entry textarea {
  display: block;
  inline-size: 100%;
  min-block-size: 1lh;
  field-sizing: content;
  resize: none;
  overflow: hidden;
  overflow-wrap: anywhere;
  text-indent: var(--prompt-indent);
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  caret-color: var(--ink);
  font: inherit;
  letter-spacing: inherit;
  text-shadow: inherit;
  text-transform: uppercase;
}

.entry textarea:placeholder-shown {
  caret-color: transparent;
}

.entry textarea:focus {
  outline: none;
}

.cursor {
  position: absolute;
  inset-block-start: .5lh;
  inset-inline-start: var(--prompt-indent);
  inline-size: .88ch;
  block-size: .72em;
  transform: translateY(-50%);
  background: var(--ink);
  box-shadow: 0 0 6px var(--bloom);
  pointer-events: none;
  animation: cursor-blink 1.12s step-end infinite;
}

.entry textarea:not(:placeholder-shown) + .cursor {
  visibility: hidden;
}

.console[data-state="processing"] .cursor {
  animation: none;
}

.console[data-state="response"] .prompt {
  opacity: 0;
  pointer-events: none;
}

.response {
  pointer-events: none;
}

.node-nav {
  align-self: flex-end;
  margin-block-start: auto;
  padding-block-start: 24px;
  font-size: 70%;
}

.node-nav a {
  display: grid;
  min-inline-size: 44px;
  min-block-size: 44px;
  place-items: center;
  color: transparent; /* Previous color: #565b61. */
  text-decoration: none;
  text-shadow: inherit;
}

.visually-hidden {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

@keyframes cursor-blink {
  0%, 52% { opacity: 1; }
  53%, 100% { opacity: 0; }
}

@keyframes surface-noise {
  0%, 100% { transform: translate(0, 0); opacity: .72; }
  11% { transform: translate(-3px, 2px); opacity: .88; }
  29% { transform: translate(4px, -3px); opacity: .65; }
  43% { transform: translate(-2px, -5px); opacity: .79; }
  67% { transform: translate(5px, 1px); opacity: .7; }
  83% { transform: translate(-5px, 4px); opacity: .84; }
  94% { transform: translate(2px, -2px); opacity: .68; }
}

@keyframes surface-brightness {
  0%, 100% { opacity: .85; }
  17% { opacity: .96; }
  23% { opacity: .8; }
  46% { opacity: .9; }
  61% { opacity: .72; }
  69% { opacity: .88; }
  91% { opacity: 1; }
}

@media (max-width: 600px) {
  .crt {
    --gutter: 16px;
    padding-block-start: 16px;
  }

  .terminal {
    margin-block-start: 1lh;
  }

  .system-line, .standby, .prompt, .response {
    --wrapped-padding: .155em;
  }

  .system-line + .system-line {
    margin-block-start: .15em;
  }

  .node-nav {
    order: -1;
    margin-block-start: 0;
    padding-block-start: 0;
    font-size: 62.5%;
  }

  .node-nav a {
    justify-items: end;
    -webkit-tap-highlight-color: transparent;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cursor, .crt::before, .crt::after { animation: none; }
}