:root {
  --bg: #0b100e;
  --panel: #121a17;
  --line: #24332d;
  --text: #d6e4dc;
  --muted: #84978d;
  --accent: #4fd18b;
  --arrival: #5cc8ff;
  --departure: #ffc857;
  --danger: #ff5a5a;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  height: 100vh;
}

.scope {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-right: 1px solid var(--line);
}

#radar {
  flex: 1;
  width: 100%;
  min-height: 0;
  display: block;
  cursor: crosshair;
}

.command {
  display: flex;
  gap: 8px;
  padding: 10px 12px 4px;
}

.command input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  background: #07100c;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 6px;
  font: 16px var(--mono);
  text-transform: uppercase;
}

.command input::placeholder { color: var(--muted); text-transform: none; }
.command input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

button {
  padding: 8px 12px;
  background: #1b2722;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  cursor: pointer;
}

button:hover { border-color: var(--accent); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button[aria-pressed="true"] { background: var(--accent); color: #062012; border-color: var(--accent); }

.feedback {
  min-height: 1.5em;
  margin: 0;
  padding: 0 12px 10px;
  font-family: var(--mono);
  color: var(--muted);
}

.feedback.error { color: var(--danger); }
.feedback.ok { color: var(--accent); }

.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--panel);
}

.bar { padding: 12px 14px; border-bottom: 1px solid var(--line); }
h1 { margin: 0 0 10px; font-size: 18px; }
h2 { margin: 0 0 6px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.airport { font: 13px var(--mono); color: var(--muted); }

.controls { display: flex; flex-wrap: wrap; gap: 6px; }
.rate { display: flex; gap: 2px; }
.rate button { padding: 8px 10px; }

.stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin: 0;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}

.stats div { text-align: center; }
.stats dt { font-size: 11px; color: var(--muted); }
.stats dd { margin: 0; font: 600 18px var(--mono); }

.help { padding: 10px 14px; border-bottom: 1px solid var(--line); overflow: auto; max-height: 50vh; }
.help p { margin: 0 0 8px; }
.help table { border-collapse: collapse; margin-bottom: 8px; }
.help td { padding: 2px 8px 2px 0; vertical-align: top; }
code { font-family: var(--mono); color: var(--accent); }

.strips { padding: 10px 14px; border-bottom: 1px solid var(--line); overflow: auto; flex: 1 1 40%; min-height: 0; }
.strips ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }

.strip {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0 8px;
  width: 100%;
  padding: 6px 8px;
  text-align: left;
  font: 13px var(--mono);
  border-left: 4px solid var(--arrival);
}

.strip.departure { border-left-color: var(--departure); }
.strip.conflict { border-color: var(--danger); }
.strip.selected { background: #26362f; border-top-color: var(--text); border-right-color: var(--text); border-bottom-color: var(--text); }
.strip .sub { grid-column: 1 / -1; color: var(--muted); }

.log { padding: 10px 14px; overflow: auto; flex: 1 1 40%; min-height: 0; }
.log ol { list-style: none; margin: 0; padding: 0; font: 12px var(--mono); }
.log li { padding: 2px 0; color: var(--muted); }
.log li.readback { color: var(--text); }
.log li.good { color: var(--accent); }
.log li.bad, .log li.error { color: var(--danger); }
.log time { color: #5b6b63; margin-right: 6px; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .scope { height: 100vw; max-height: 80vh; border-right: 0; }
  .stats { grid-template-columns: repeat(3, 1fr); row-gap: 6px; }
  .strips, .log { max-height: 40vh; }
}