:root {
  --bg: #060a12;
  --panel: #0c1524;
  --line: #142c44;
  --accent: #35d6f0;
  --accent-soft: rgba(53, 214, 240, 0.25);
  --text: #d8ecf5;
  --muted: #6b8299;
  --ok: #4ade80;
  --warn: #f8b84a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: radial-gradient(ellipse at 50% -20%, #0d1e33 0%, var(--bg) 60%);
  color: var(--text);
  font-family: "Segoe UI", system-ui, sans-serif;
  min-height: 100vh;
}

.hud {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hud-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--accent-soft);
  padding-bottom: 12px;
}

.hud-header h1 {
  font-size: 1.3rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}

.hud-clock { text-align: right; }
.hud-clock #clock { display: block; font-size: 1.6rem; font-variant-numeric: tabular-nums; }
.hud-clock #date { color: var(--muted); font-size: 0.8rem; }

/* Core reactor */
.hud-core { display: flex; flex-direction: column; align-items: center; gap: 10px; }

.reactor { position: relative; width: 150px; height: 150px; }
.ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid var(--accent-soft);
}
.ring-outer { border-top-color: var(--accent); animation: spin 8s linear infinite; }
.ring-mid { inset: 18px; border-bottom-color: var(--accent); animation: spin 5s linear infinite reverse; }
.ring-inner { inset: 36px; border-left-color: var(--accent); animation: spin 3s linear infinite; }
.core {
  position: absolute; inset: 54px; border-radius: 50%;
  background: radial-gradient(circle, #bdf3ff 0%, var(--accent) 45%, transparent 75%);
  animation: pulse 2.4s ease-in-out infinite;
}

.reactor.listening .ring { border-color: var(--ok); }
.reactor.listening .core { background: radial-gradient(circle, #d9ffe8 0%, var(--ok) 45%, transparent 75%); }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { opacity: 0.75; transform: scale(0.96); } 50% { opacity: 1; transform: scale(1.04); } }

.listen-state {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

/* Console */
.hud-console {
  background: var(--panel);
  border: 1px solid var(--accent-soft);
  border-radius: 10px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.console-line { display: flex; gap: 12px; align-items: baseline; }
.console-label {
  min-width: 60px;
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.console-text { flex: 1; line-height: 1.5; }
.muted { color: var(--muted); }

.command-form { display: flex; gap: 8px; }
.command-form input {
  flex: 1;
  background: #081020;
  border: 1px solid var(--accent-soft);
  border-radius: 6px;
  color: var(--text);
  padding: 10px 14px;
  font-size: 0.95rem;
}
.command-form input:focus { outline: 1px solid var(--accent); }
.command-form button, .confirm-bar button {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 6px;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}
.command-form button:hover, .confirm-bar button:hover { background: var(--accent-soft); }

.confirm-bar {
  display: flex; gap: 10px; align-items: center;
  border: 1px solid var(--warn);
  border-radius: 6px;
  padding: 10px 14px;
}
.confirm-bar p { flex: 1; color: var(--warn); }
.confirm-bar.hidden { display: none; }

/* Telemetry panels */
.hud-panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--accent-soft);
  border-radius: 10px;
  padding: 14px;
}
.panel-wide { grid-column: 1 / -1; }
.panel h2 {
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.panel-value { font-size: 1.2rem; font-variant-numeric: tabular-nums; }
.panel-sub { color: var(--muted); font-size: 0.75rem; margin-top: 4px; }

.gauge {
  height: 6px;
  background: #081020;
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}
.gauge-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent), #7ee8fa);
  border-radius: 3px;
  transition: width 0.6s ease;
}

.action-log { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.action-log li {
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(53, 214, 240, 0.12);
  padding-bottom: 4px;
}
.action-log .ok { color: var(--ok); }
.action-log .fail { color: var(--warn); }

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