:root {
  --board-dark: #0A2018;
  --board: #0F2E22;
  --board-panel: #123A29;
  --board-line: #24573F;
  --board-line-soft: #1A4531;
  --copper: #C79A56;
  --copper-bright: #E7BE73;
  --silk: #ECE7D8;
  --silk-dim: #96AFA1;
  --silk-faint: #6E8B7C;
  --led-red: #FF5C5C;
  --led-red-glow: rgba(255, 92, 92, 0.55);
  --led-amber: #FFB648;
  --led-amber-glow: rgba(255, 182, 72, 0.5);
  --led-green: #4CE6A0;
  --led-green-glow: rgba(76, 230, 160, 0.5);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--board-dark);
  color: var(--silk);
  font-family: var(--font-body);
}

body {
  background-image:
    radial-gradient(var(--board-line-soft) 1px, transparent 1.4px);
  background-size: 26px 26px;
  min-height: 100vh;
}

.board {
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.panel {
  background: var(--board-panel);
  border: 1px solid var(--board-line);
  border-radius: 6px;
  padding: 28px 30px;
  margin-bottom: 22px;
  position: relative;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--copper);
  margin-bottom: 10px;
}

h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 30px;
  margin: 0;
  color: var(--silk);
  letter-spacing: -0.01em;
}

.rev-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silk-dim);
  border: 1px solid var(--board-line);
  border-radius: 3px;
  padding: 4px 9px;
  white-space: nowrap;
  margin-top: 4px;
}

.subtitle {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--silk-dim);
  max-width: 640px;
  margin: 16px 0 0;
}

.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--copper);
  letter-spacing: 0.03em;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.field-hint {
  color: var(--silk-faint);
  text-transform: none;
  font-family: var(--font-body);
  letter-spacing: normal;
  margin-left: 8px;
}

textarea {
  width: 100%;
  background: var(--board-dark);
  border: 1px solid var(--board-line);
  border-radius: 4px;
  color: var(--silk);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  padding: 14px 16px;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s ease;
}

textarea:focus {
  border-color: var(--copper);
}

.controls-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.switch-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--copper);
  color: #17231B;
  border: none;
  border-radius: 4px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14.5px;
  padding: 12px 20px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

.switch-btn:hover { background: var(--copper-bright); }
.switch-btn:active { transform: translateY(1px); }
.switch-btn:disabled { opacity: 0.55; cursor: default; }

.switch-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #17231B;
  box-shadow: 0 0 0 rgba(0,0,0,0);
  transition: box-shadow 0.2s ease, background 0.2s ease;
}

.switch-btn.running .switch-led {
  background: var(--led-green);
  box-shadow: 0 0 8px 2px var(--led-green-glow);
  animation: pulse 1s ease-in-out infinite;
}

.ghost-btn {
  background: transparent;
  border: 1px solid var(--board-line);
  color: var(--silk-dim);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 11px 18px;
  border-radius: 4px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.ghost-btn:hover:not(:disabled) {
  border-color: var(--copper);
  color: var(--copper-bright);
}

.ghost-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.status-line {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--silk-faint);
}

.status-line.error { color: var(--led-red); }

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

h2 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0;
  color: var(--silk);
}

.legend {
  display: flex;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silk-dim);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.led {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.led-green { background: var(--led-green); box-shadow: 0 0 6px 1.5px var(--led-green-glow); }
.led-amber { background: var(--led-amber); box-shadow: 0 0 6px 1.5px var(--led-amber-glow); }
.led-red { background: var(--led-red); box-shadow: 0 0 6px 1.5px var(--led-red-glow); }

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--board-line);
  border-radius: 5px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 13px;
  min-width: 920px;
}

thead th {
  text-align: left;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--silk-faint);
  background: var(--board-dark);
  padding: 11px 14px;
  border-bottom: 1px solid var(--board-line);
  white-space: nowrap;
}

tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--board-line-soft);
  color: var(--silk);
  vertical-align: top;
}

tbody tr:last-child td { border-bottom: none; }

tbody tr:hover {
  background: rgba(199, 154, 86, 0.06);
}

.col-led { width: 30px; }

.notes-cell {
  color: var(--silk-dim);
  font-family: var(--font-body);
  font-size: 12.5px;
  max-width: 260px;
}

.footer-note {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silk-faint);
  margin-top: 30px;
  line-height: 1.7;
}

.footer-note code {
  color: var(--copper);
  background: rgba(199, 154, 86, 0.1);
  padding: 1px 5px;
  border-radius: 3px;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 8px 2px var(--led-green-glow); }
  50% { box-shadow: 0 0 3px 0.5px var(--led-green-glow); }
}

@media (prefers-reduced-motion: reduce) {
  .switch-btn.running .switch-led { animation: none; }
}

@media (max-width: 640px) {
  .board { padding: 28px 14px 60px; }
  .panel { padding: 20px 18px; }
  h1 { font-size: 24px; }
  .header-top { flex-direction: column; }
}