:root {
  --bg: #0d1420;
  --panel: #141b28;
  --panel-border: #263044;
  --text: #e8edf5;
  --text-dim: #7c8aa3;
  --mono: "SFMono-Regular", "Cascadia Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* LED semaphore -- the single, meaningful color language of the page */
  --led-green: #2fe3a3;
  --led-amber: #ffb224;
  --led-red: #ff4d5e;
  --led-off: #3a4458;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #eef1f6;
    --panel: #ffffff;
    --panel-border: #d7deea;
    --text: #182233;
    --text-dim: #5c6b85;
    --led-off: #c7cfdd;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--panel-border);
}
.topbar-left { display: flex; align-items: baseline; gap: 10px; }
.topbar-left h1 { font-size: 17px; margin: 0; font-weight: 600; }
.subtitle { color: var(--text-dim); font-size: 13px; font-family: var(--mono); }
.dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--led-off);
  display: inline-block;
  transition: background 0.3s, box-shadow 0.3s;
}
.dot.ok { background: var(--led-green); box-shadow: 0 0 8px 1px color-mix(in srgb, var(--led-green) 70%, transparent); }
.dot.bad { background: var(--led-red); box-shadow: 0 0 8px 1px color-mix(in srgb, var(--led-red) 70%, transparent); }

.muted { color: var(--text-dim); font-size: 12px; }

.error-banner {
  margin: 16px 24px 0;
  padding: 10px 14px;
  background: color-mix(in srgb, var(--led-red) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--led-red) 40%, transparent);
  color: var(--led-red);
  border-radius: 8px;
  font-size: 13px;
  font-family: var(--mono);
}
.hidden { display: none; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
  padding: 20px 24px 40px;
}

/* ------------------------------------------------------------------ */
/* Instrument panel -- the one bold element                           */
/* ------------------------------------------------------------------ */

.instrument {
  grid-column: 1 / -1;
  position: relative;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 100%, white 2%) 0%, var(--panel) 100%);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 22px 26px 18px;
  box-shadow: inset 0 1px 0 color-mix(in srgb, white 4%, transparent),
              0 10px 30px -18px rgba(0,0,0,0.6);
  overflow: hidden;
}
.instrument-vents {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--panel-border) 55%, transparent) 0px,
    color-mix(in srgb, var(--panel-border) 55%, transparent) 1px,
    transparent 1px,
    transparent 7px
  );
  mask-image: linear-gradient(180deg, transparent 0%, black 2%, black 6%, transparent 7%);
}

.instrument-row {
  position: relative;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: space-between;
}

.instrument-clock-block { min-width: 160px; }
.instrument-clock {
  font-family: var(--mono);
  font-size: 34px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.instrument-clock .colon { animation: blink 1s steps(1) infinite; }
.instrument-clock-caption {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}
@keyframes blink { 50% { opacity: 0.15; } }

.instrument-leds {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.led-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: color-mix(in srgb, var(--bg) 40%, transparent);
  font-size: 13px;
  color: var(--text-dim);
}
.led-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--led-off);
  transition: background 0.3s, box-shadow 0.3s;
  flex-shrink: 0;
}
.led-chip.on .led-dot.green { background: var(--led-green); box-shadow: 0 0 9px 2px color-mix(in srgb, var(--led-green) 65%, transparent); }
.led-chip.on .led-dot.amber { background: var(--led-amber); box-shadow: 0 0 9px 2px color-mix(in srgb, var(--led-amber) 65%, transparent); }
.led-chip.on .led-dot.red   { background: var(--led-red);   box-shadow: 0 0 9px 2px color-mix(in srgb, var(--led-red) 65%, transparent); }
.led-chip .led-text { color: var(--text); font-weight: 500; }

.instrument-readout { text-align: right; }
.readout-label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.readout-value {
  font-family: var(--mono);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--led-amber);
  text-shadow: 0 0 18px color-mix(in srgb, var(--led-amber) 55%, transparent);
  font-variant-numeric: tabular-nums;
  transition: color 0.4s, text-shadow 0.4s;
}
.readout-value.state-green { color: var(--led-green); text-shadow: 0 0 18px color-mix(in srgb, var(--led-green) 55%, transparent); }
.readout-value.state-red   { color: var(--led-red);   text-shadow: 0 0 18px color-mix(in srgb, var(--led-red) 55%, transparent); }
.readout-value.pulse { animation: readout-pulse 0.6s ease-out; }
@keyframes readout-pulse {
  0% { opacity: 0.4; }
  100% { opacity: 1; }
}

.instrument-gauge {
  position: relative;
  margin: 20px 0 6px;
}

.instrument-details {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px 24px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--panel-border);
}
.detail-label {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 3px;
}
.detail-value {
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--text);
}

/* ------------------------------------------------------------------ */
/* Tabs                                                                */
/* ------------------------------------------------------------------ */

.tabbar {
  display: flex;
  gap: 4px;
  padding: 10px 24px 0;
  border-bottom: 1px solid var(--panel-border);
  overflow-x: auto;
}
.tab {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  font-size: 13px;
  color: var(--text-dim);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--text);
  border-bottom-color: var(--led-amber);
  font-weight: 600;
}
.tab .tab-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--text-dim);
}
.tab .tab-dot.ok { background: var(--led-green); }
.tab .tab-dot.bad { background: var(--led-red); }

/* ------------------------------------------------------------------ */
/* Quiet content cards                                                 */
/* ------------------------------------------------------------------ */

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 16px 18px;
}
.card-wide { grid-column: 1 / -1; }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.card-head h2 {
  font-size: 14px;
  color: var(--text);
  margin: 0;
  font-weight: 600;
}

.badge {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--led-amber) 14%, transparent);
  color: var(--led-amber);
  font-family: var(--mono);
}
.badge.warn { background: color-mix(in srgb, var(--led-amber) 14%, transparent); color: var(--led-amber); }
.badge.bad { background: color-mix(in srgb, var(--led-red) 14%, transparent); color: var(--led-red); }
.badge.badge-muted { background: transparent; color: var(--text-dim); border: 1px solid var(--panel-border); }

#offsetChart { width: 100%; display: block; }

.scope-bg {
  background-image:
    linear-gradient(color-mix(in srgb, var(--panel-border) 45%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--panel-border) 45%, transparent) 1px, transparent 1px);
  background-size: 44px 28px;
}

.ps-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 720px) {
  .ps-grid { grid-template-columns: 1fr; }
}
.ps-card {
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 16px;
  position: relative;
}
.ps-card.ps-active {
  border-color: var(--led-green);
  box-shadow: 0 0 0 1px var(--led-green) inset, 0 0 20px -8px color-mix(in srgb, var(--led-green) 60%, transparent);
}
.ps-card.ps-missing {
  opacity: 0.5;
}
.ps-role {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.ps-name {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
  word-break: break-all;
}
.ps-active-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--led-green) 16%, transparent);
  color: var(--led-green);
  font-family: var(--mono);
}
.ps-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 16px;
}
.ps-stat-label {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 2px;
}
.ps-stat-value {
  font-family: var(--mono);
  font-size: 14px;
}
.ps-offset-value {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 600;
}

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left;
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 500;
  padding: 6px 10px;
  border-bottom: 1px solid var(--panel-border);
}
td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--panel-border);
  font-family: var(--mono);
  white-space: nowrap;
}
tr:last-child td { border-bottom: none; }

.state-pill {
  display: inline-block;
  width: 9px; height: 9px;
  border-radius: 50%;
}
.state-sync { background: var(--led-green); box-shadow: 0 0 6px 1px color-mix(in srgb, var(--led-green) 55%, transparent); }
.state-candidate { background: var(--led-amber); }
.state-unusable, .state-falseticker { background: var(--led-red); }
.state-unreachable, .state-unstable { background: var(--led-off); }

.footer {
  text-align: center;
  padding: 20px;
}