:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --panel: #0f1318;
  --ink: #d8e1ee;
  --muted: #8ea3bf;
  --accent: #8cffd2;
  --danger: #ff7b7b;
  --border: rgba(216, 225, 238, 0.14);
  --shadow: rgba(0, 0, 0, 0.45);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: radial-gradient(1200px 800px at 20% 0%, #101827 0%, var(--bg) 55%);
  color: var(--ink);
  font-family: var(--mono);
  display: grid;
  place-items: center;
  padding: 18px;
}

.shell {
  width: min(920px, 100%);
  height: min(740px, 100dvh);
  border: 1px solid var(--border);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 35%),
    var(--panel);
  box-shadow: 0 20px 60px var(--shadow);
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.03em;
}

.meta {
  display: flex;
  gap: 14px;
  color: var(--muted);
  font-size: 13px;
}

.screen {
  overflow: auto;
  padding: 16px;
}

.transcript {
  display: flex;
  flex-direction: column;
  gap: 10px;
  line-height: 1.45;
  font-size: 14px;
}

.line {
  white-space: pre-wrap;
  word-break: break-word;
}

.line.user {
  color: var(--accent);
}

.line.system {
  color: var(--muted);
}

.line.error {
  color: var(--danger);
}

.prompt {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.promptLabel {
  color: var(--muted);
}

.commandInput {
  width: 100%;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.25);
  color: var(--ink);
  padding: 10px 12px;
  border-radius: 10px;
  outline: none;
  font-family: var(--mono);
  font-size: 14px;
}

.commandInput:focus {
  border-color: rgba(140, 255, 210, 0.6);
  box-shadow: 0 0 0 3px rgba(140, 255, 210, 0.12);
}

.sendBtn {
  border: 1px solid var(--border);
  background: rgba(140, 255, 210, 0.12);
  color: var(--ink);
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  font-family: var(--mono);
}

.sendBtn:hover {
  border-color: rgba(140, 255, 210, 0.5);
  background: rgba(140, 255, 210, 0.16);
}

.footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.footerBtn {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  padding: 8px 10px;
  border-radius: 10px;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 13px;
}

.footerBtn:hover {
  border-color: rgba(216, 225, 238, 0.3);
  background: rgba(255, 255, 255, 0.06);
}