:root {
  --navy-deep: #000000;
  --navy: #000000;
  --navy-panel: #000000;
  --navy-border: #262626;
  --sky: #4fd1ff;
  --sky-bright: #ffffff;
  --sky-dim: #38bdf8;
  --sky-faint: #1b2a38;
  --sky-rgb: 79,209,255;
  --white-blue: #ffffff;
  --error: #ff5c5c;
  --font: "JetBrains Mono", "Fira Code", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--navy-deep);
  font-family: var(--font);
}

body {
  display: flex;
  padding: 15px;
  box-sizing: border-box;
}

.crt {
  flex: 1;
  width: 100%;
  height: 100%;
  background: var(--navy-deep);
  border-radius: 10px;
  border: 1px solid var(--navy-border);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.titlebar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--navy-border);
  background: var(--navy);
  position: relative;
  z-index: 2;
}

.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--sky-faint); }
.titlebar span.label {
  margin-left: 8px;
  color: var(--sky-dim);
  font-size: 12px;
  letter-spacing: 0.05em;
}

/* ---------- Boot overlay ---------- */
.boot {
  position: absolute;
  inset: 0;
  top: 41px;
  background: var(--navy-deep);
  z-index: 5;
  padding: 20px 22px;
  font-size: 13px;
  color: var(--sky-dim);
  line-height: 1.9;
  transition: opacity 0.5s ease;
}
.boot.hidden { opacity: 0; pointer-events: none; }

.boot-line { white-space: pre; opacity: 0; }
.boot-line.show { opacity: 1; }
.boot-line .ok { color: var(--sky); }
.boot-line .tag { color: var(--sky-bright); }

/* ---------- Screen ---------- */
.screen {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 18px 20px 8px;
  color: var(--sky-bright);
  font-size: 14px;
  line-height: 1.6;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.screen.show { opacity: 1; }

.screen::-webkit-scrollbar { width: 8px; }
.screen::-webkit-scrollbar-thumb { background: var(--sky-faint); border-radius: 4px; }
.screen::-webkit-scrollbar-track { background: transparent; }

.intro {
  color: var(--sky-dim);
  margin-bottom: 14px;
  white-space: pre-wrap;
}
.intro strong { color: var(--sky); }

.entry { margin-bottom: 12px; }

.prompt-line {
  display: flex;
  gap: 8px;
  color: var(--sky);
}
.prompt-line .prompt-symbol { color: var(--sky-dim); }
.prompt-line .typed { color: var(--white-blue); }

.output { margin-top: 4px; white-space: pre-wrap; color: var(--sky-dim); }
.output.error { color: var(--error); }
.output a {
  color: var(--sky);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.output a:hover { color: var(--sky-bright); }

.ascii-wrap {
  margin-top: 10px;
  overflow: hidden;
}

.ascii-block {
  margin: 0;
  font-family: var(--font);
  font-size: 7px;
  line-height: 7px;
  letter-spacing: 0;
  color: var(--sky);
  white-space: pre;
}

.signature {
  flex: 0 0 auto;
  margin: 0;
  padding: 6px 20px 2px;
  color: var(--sky-faint);
  font-family: var(--font);
  font-size: 9px;
  line-height: 1.1;
  white-space: pre;
  overflow-x: auto;
}

.input-row {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px 16px;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.input-row.show { opacity: 1; }
.input-row .prompt-symbol { color: var(--sky-dim); }

.input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  position: relative;
}

.typed-echo {
  color: var(--white-blue);
  font-family: var(--font);
  font-size: 14px;
  white-space: pre;
}

.cursor {
  width: 8px;
  height: 16px;
  background: var(--sky);
  margin-left: 2px;
  flex-shrink: 0;
  animation: blink 1s step-end infinite;
}


.cmd-input {
  position: absolute;
  inset: 0;
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: transparent;
  caret-color: transparent;
  font-family: var(--font);
  font-size: 14px;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}