/* MIDI LED Configuration Dashboard - Dark theme for live performance */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  background: #1a1a2e;
  color: #e0e0e0;
  line-height: 1.6;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
}

header {
  text-align: center;
  padding: 1rem 0;
  border-bottom: 2px solid #16213e;
  margin-bottom: 1.5rem;
}

header h1 {
  color: #00d4ff;
  font-size: 1.6rem;
  font-weight: 600;
}

/* Sections */
section {
  background: #16213e;
  border: 1px solid #0f3460;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

section h2 {
  color: #00d4ff;
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid #0f3460;
}

/* Brightness slider */
.slider-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.slider-row input[type="range"] {
  flex: 1;
  accent-color: #00d4ff;
  height: 6px;
}

.slider-row span {
  min-width: 3ch;
  text-align: right;
  font-weight: 600;
  font-size: 1.2rem;
  color: #00d4ff;
}

/* Select */
select {
  background: #0a1628;
  color: #e0e0e0;
  border: 1px solid #0f3460;
  border-radius: 4px;
  padding: 0.4rem 0.6rem;
  font-size: 0.95rem;
  width: 100%;
  max-width: 300px;
}

select:focus {
  outline: none;
  border-color: #00d4ff;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0.75rem;
}

thead th {
  text-align: left;
  padding: 0.4rem 0.5rem;
  background: #0a1628;
  color: #7fb3d4;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tbody tr:nth-child(even) {
  background: rgba(15, 52, 96, 0.3);
}

tbody tr:hover {
  background: rgba(0, 212, 255, 0.08);
}

td {
  padding: 0.35rem 0.5rem;
}

/* Inputs inside tables */
td input[type="number"],
td input[type="text"] {
  width: 100%;
  background: #0a1628;
  color: #e0e0e0;
  border: 1px solid #0f3460;
  border-radius: 3px;
  padding: 0.3rem 0.4rem;
  font-size: 0.9rem;
}

td input[type="color"] {
  width: 40px;
  height: 28px;
  border: 1px solid #0f3460;
  border-radius: 3px;
  background: #0a1628;
  cursor: pointer;
  padding: 1px;
}

td select {
  width: 100%;
  font-size: 0.9rem;
  padding: 0.3rem 0.4rem;
}

td input:focus,
td select:focus {
  outline: none;
  border-color: #00d4ff;
}

td input.invalid {
  border-color: #ff4444;
  background: rgba(255, 68, 68, 0.1);
}

.error-msg {
  color: #ff4444;
  font-size: 0.8rem;
  display: block;
}

/* Buttons */
.btn {
  padding: 0.45rem 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, transform 0.1s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-save {
  background: #00d4ff;
  color: #0a1628;
}

.btn-save:hover {
  background: #33ddff;
}

.btn-add {
  background: #0f3460;
  color: #e0e0e0;
}

.btn-add:hover {
  background: #1a4a7a;
}

.btn-remove {
  background: transparent;
  color: #ff4444;
  font-size: 0.85rem;
  padding: 0.3rem 0.6rem;
}

.btn-remove:hover {
  background: rgba(255, 68, 68, 0.15);
}

.btn-params {
  background: #0f3460;
  color: #7fb3d4;
  font-size: 0.85rem;
  padding: 0.3rem 0.7rem;
}

.btn-params:hover {
  background: #1a4a7a;
}

.btn-params.active {
  background: #00d4ff;
  color: #0a1628;
}

.btn-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* Form grid for Network */
.form-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
  align-items: center;
  max-width: 400px;
}

.form-grid label {
  color: #7fb3d4;
  font-size: 0.9rem;
}

.form-grid input {
  background: #0a1628;
  color: #e0e0e0;
  border: 1px solid #0f3460;
  border-radius: 3px;
  padding: 0.4rem 0.5rem;
  font-size: 0.9rem;
}

.form-grid input:focus {
  outline: none;
  border-color: #00d4ff;
}

/* Effect params editor */
.effect-params-panel {
  background: #0a1628;
  border: 1px solid #0f3460;
  border-radius: 6px;
  padding: 1rem;
  margin-top: 0.75rem;
}

.effect-params-panel h3 {
  color: #00d4ff;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.param-slider-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.param-slider-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.param-slider-item label {
  font-size: 0.8rem;
  color: #7fb3d4;
  min-width: 80px;
}

.param-slider-item input[type="range"] {
  flex: 1;
  accent-color: #00d4ff;
}

.param-slider-item .param-val {
  min-width: 2.5ch;
  text-align: right;
  font-size: 0.8rem;
  color: #e0e0e0;
}

/* Learn mode */
.btn-learn {
  background: #00d4ff;
  color: #0a1628;
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.btn-learn:hover {
  background: #33ddff;
}

.btn-sm {
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  background: #0f3460;
  color: #e0e0e0;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.btn-sm:hover {
  background: #1a4a7a;
}

.learn-status {
  background: rgba(0, 212, 255, 0.15);
  border: 1px solid #00d4ff;
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #00d4ff;
  font-size: 0.9rem;
}

.learn-indicator {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #00d4ff;
  animation: learnPulse 1s infinite;
}

@keyframes learnPulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px rgba(0, 212, 255, 0.8); }
  50% { opacity: 0.3; box-shadow: none; }
}

.learn-form {
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid #0f3460;
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.learn-form label {
  color: #7fb3d4;
}

.learn-form input[type="number"] {
  width: 60px;
  background: #0a1628;
  color: #e0e0e0;
  border: 1px solid #0f3460;
  border-radius: 3px;
  padding: 0.2rem 0.4rem;
  font-size: 0.9rem;
}

.learn-form input[type="number"]:focus {
  outline: none;
  border-color: #00d4ff;
}

/* Color palettes */
.palette-card {
  background: #0a1628;
  border: 1px solid #0f3460;
  border-radius: 6px;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
}

.palette-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.palette-id-input {
  width: 120px;
  background: #16213e;
  color: #7fb3d4;
  border: 1px solid #0f3460;
  border-radius: 3px;
  padding: 0.3rem 0.4rem;
  font-size: 0.85rem;
}

.palette-name-input {
  flex: 1;
  background: #16213e;
  color: #e0e0e0;
  border: 1px solid #0f3460;
  border-radius: 3px;
  padding: 0.3rem 0.4rem;
  font-size: 0.85rem;
}

.palette-id-input:focus,
.palette-name-input:focus {
  outline: none;
  border-color: #00d4ff;
}

.palette-swatches {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.palette-swatch-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.palette-color-input {
  width: 32px;
  height: 32px;
  border: 1px solid #0f3460;
  border-radius: 3px;
  background: #0a1628;
  cursor: pointer;
  padding: 1px;
}

.palette-color-remove {
  font-size: 0.7rem !important;
  padding: 0 4px !important;
  line-height: 1.2;
}

#palettes-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

/* LED Preview */
#preview-section {
  background: #121a30;
  border: 1px solid #0f3460;
}

#preview-canvas {
  display: block;
  margin: 0 auto 12px;
  background: #111;
  border: 1px solid #333;
  border-radius: 4px;
}

.preview-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.preview-controls select {
  max-width: 140px;
}

.preview-controls input[type="color"] {
  width: 40px;
  height: 32px;
  border: 1px solid #0f3460;
  border-radius: 3px;
  background: #0a1628;
  cursor: pointer;
  padding: 1px;
}

.preview-controls .btn {
  min-width: 70px;
}

.preview-controls .btn-remove {
  background: #3a1a1a;
  color: #ff6666;
  padding: 0.45rem 1rem;
}

.preview-controls .btn-remove:hover {
  background: #4a2222;
}

.preview-controls .btn-remove:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.preview-controls .btn-save:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Monitor Dashboard */
.monitor-section {
  background: #121a30;
}

.firmware-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: rgba(0,212,255,0.05);
  border: 1px solid #0f3460;
  border-radius: 6px;
  flex-wrap: wrap;
}
.firmware-info {
  font-size: 0.85rem;
  color: #a0a0b0;
}
.firmware-version {
  font-family: monospace;
  color: #00d4ff;
}
.firmware-state {
  color: #888;
  text-transform: uppercase;
  font-size: 0.75rem;
}
.firmware-state.building {
  color: #f59e0b;
}
.firmware-state.success {
  color: #22c55e;
}
.firmware-state.failed {
  color: #ff4444;
}
.client-update-btn {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  margin-left: auto;
  background: #f59e0b;
  color: #0a1628;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  font-weight: 600;
}
.client-update-btn:hover {
  background: #fbbf24;
}
.client-update-btn:disabled {
  background: #555;
  color: #888;
  cursor: not-allowed;
}
.client-deploy-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.25rem;
}
.client-serial-btn {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  background: #7c3aed;
  color: #fff;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  font-weight: 600;
}
.client-serial-btn:hover {
  background: #8b5cf6;
}
.client-serial-btn:disabled {
  background: #555;
  color: #888;
  cursor: not-allowed;
}
.client-baud-select {
  font-size: 0.65rem;
  padding: 0.1rem 0.2rem;
  background: var(--card-bg, #1e293b);
  color: var(--text, #e2e8f0);
  border: 1px solid var(--border, #334155);
  border-radius: 3px;
  cursor: pointer;
}
.client-com-port {
  font-family: monospace;
  font-size: 0.7rem;
  color: #a78bfa;
  background: rgba(124, 58, 237, 0.15);
  padding: 0.05rem 0.35rem;
  border-radius: 3px;
  font-weight: 600;
}

.monitor-overview,
.monitor-latency {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.metric-box {
  background: #0a1628;
  border: 1px solid #0f3460;
  border-radius: 6px;
  padding: 0.6rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 80px;
  flex: 1;
}

.metric-label {
  font-size: 0.75rem;
  color: #7fb3d4;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.25rem;
}

.metric-value {
  font-size: 1.2rem;
  font-weight: 600;
  color: #00d4ff;
}

.monitor-clients {
  margin-bottom: 1rem;
}

.monitor-empty {
  color: #555;
  font-style: italic;
  text-align: center;
  padding: 0.5rem;
}

.client-card {
  background: #1a1a2e;
  border: 1px solid #0f3460;
  border-radius: 6px;
  padding: 0.6rem 0.8rem 0.4rem;
  margin-bottom: 0.4rem;
}

.client-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.client-mac {
  font-family: monospace;
  font-size: 0.9rem;
  color: #e0e0e0;
}

.client-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  font-size: 0.8rem;
  color: #888;
}

.client-card-stats {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: #999;
  flex-wrap: wrap;
  padding: 0.1rem 0;
}

.stat-label {
  color: #666;
}

.client-brightness-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: 0.85em;
}

.client-brightness-slider {
  flex: 1;
  height: 6px;
  accent-color: #f59e0b;
}

.client-brightness-val {
  min-width: 28px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: #ccc;
}

.client-badge {
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  background: #0f3460;
  color: #aaa;
  margin-left: auto;
}

.client-badge + .client-badge {
  margin-left: 0.3rem;
}

.client-badge.signal-good {
  background: #0a3d1f;
  color: #00ff88;
}

.client-badge.signal-ok {
  background: #3d3a0a;
  color: #ffd700;
}

.client-badge.signal-weak {
  background: #3d0a0a;
  color: #ff4444;
}

.signal-alert {
  background: #3d0a0a;
  color: #ff4444;
  border: 1px solid #ff4444;
  border-radius: 4px;
  padding: 0.6rem 1rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.signal-alert-close {
  border: none;
  background: none;
  color: #ff4444;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 0.3rem;
}

.status-dot-green {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #00ff88;
  box-shadow: 0 0 6px rgba(0, 255, 136, 0.5);
  flex-shrink: 0;
}

.status-dot-red {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ff4444;
  box-shadow: 0 0 6px rgba(255, 68, 68, 0.5);
  flex-shrink: 0;
}

.monitor-charts {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.chart-container {
  flex: 1;
  min-width: 200px;
}

.chart-label {
  display: block;
  font-size: 0.8rem;
  color: #7fb3d4;
  margin-bottom: 0.25rem;
}

.chart-container canvas {
  width: 100%;
  background: #0a1628;
  border: 1px solid #0f3460;
  border-radius: 4px;
}

.debug-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.debug-log-count {
  font-size: 0.85rem;
  color: #7fb3d4;
}

/* Panel FPS Calculator */
#calculator-section {
  background: #121a30;
}

.calc-inputs {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
  min-width: 100px;
}

.calc-field label {
  font-size: 0.8rem;
  color: #7fb3d4;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.calc-field input {
  background: #0a1628;
  color: #e0e0e0;
  border: 1px solid #0f3460;
  border-radius: 4px;
  padding: 0.4rem 0.5rem;
  font-size: 1rem;
  width: 100%;
}

.calc-field input:focus {
  outline: none;
  border-color: #00d4ff;
}

.calc-results {
  margin-bottom: 1rem;
}

.calc-result-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.calc-result-row .metric-box {
  flex: 1;
  min-width: 100px;
}

.calc-highlight {
  color: #00ff88 !important;
  font-size: 1.4rem !important;
}

.calc-bottleneck {
  font-size: 0.9rem !important;
  color: #00d4ff !important;
}

.calc-bottleneck-hw {
  color: #ffaa00 !important;
}

.calc-multi-panel {
  background: #0a1628;
  border: 1px solid #0f3460;
  border-radius: 6px;
  padding: 0.75rem;
}

.calc-multi-panel h3 {
  color: #00d4ff;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

/* WiFi & ESP-NOW Budget */
.calc-wifi-budget {
  background: #0a1628;
  border: 1px solid #0f3460;
  border-radius: 6px;
  padding: 0.75rem;
  margin-top: 0.75rem;
}

.calc-wifi-budget h3 {
  color: #00d4ff;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.calc-wifi-budget h4 {
  color: #7fb3d4;
  font-size: 0.8rem;
  margin-bottom: 0.4rem;
}

.calc-wifi-budget select {
  background: #0a1628;
  color: #e0e0e0;
  border: 1px solid #0f3460;
  border-radius: 4px;
  padding: 0.4rem 0.5rem;
  font-size: 0.85rem;
  width: 100%;
}

.calc-wifi-budget select:focus {
  outline: none;
  border-color: #00d4ff;
}

.calc-field-note {
  font-size: 0.7rem;
  color: #5a8faa;
  margin-top: 0.15rem;
}
.calc-cmd-manual {
  border-color: #f59e0b !important;
  box-shadow: 0 0 0 1px #f59e0b33;
}

.calc-budget-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-bottom: 0.6rem;
}

.calc-budget-table th {
  text-align: left;
  color: #7fb3d4;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-bottom: 1px solid #0f3460;
}

.calc-budget-table td {
  padding: 0.2rem 0.5rem;
  color: #c0d0e0;
}

.calc-budget-val {
  font-family: monospace;
  text-align: right;
  color: #e0e0e0;
  min-width: 3em;
}

.calc-budget-total td {
  font-weight: bold;
  color: #00d4ff;
  border-top: 1px solid #0f3460;
  padding-top: 0.35rem;
}

/* Stacked bar */
.calc-budget-bar-container {
  margin-bottom: 0.5rem;
}

.calc-budget-bar {
  display: flex;
  height: 26px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid #0f3460;
}

.calc-budget-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-family: monospace;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  transition: width 0.2s ease;
}

.calc-seg-payload { background: #00cc66; }
.calc-seg-espnow  { background: #ff8800; }
.calc-seg-80211   { background: #4466aa; }
.calc-seg-fcs     { background: #8855bb; }

.calc-row-80211 td:first-child  { border-left: 3px solid #4466aa; }
.calc-row-espnow td:first-child { border-left: 3px solid #ff8800; }
.calc-row-payload td:first-child { border-left: 3px solid #00cc66; }
.calc-row-fcs td:first-child     { border-left: 3px solid #8855bb; }

.calc-redundancy {
  margin-top: 0.6rem;
  padding: 0.5rem 0.6rem;
  background: #0d1f3c;
  border: 1px solid #0f3460;
  border-radius: 4px;
}

.calc-toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #e0e0e0;
  cursor: pointer;
}

.calc-toggle-label input[type="checkbox"] {
  accent-color: #00d4ff;
  width: 16px;
  height: 16px;
}

.calc-redundancy .calc-field-note {
  display: block;
  margin-top: 0.25rem;
  margin-left: 1.6rem;
}

.calc-budget-bar-legend {
  display: flex;
  gap: 1rem;
  margin-top: 0.3rem;
  font-size: 0.75rem;
  color: #7fb3d4;
}

.calc-legend-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.calc-legend-swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.calc-usage-good { color: #00ff88 !important; }
.calc-usage-warn { color: #ffaa00 !important; }
.calc-usage-bad  { color: #ff4444 !important; }

.calc-presets {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.calc-presets-label {
  font-size: 0.85rem;
  color: #7fb3d4;
}

.calc-preset {
  background: #0f3460 !important;
  color: #00d4ff !important;
  font-family: monospace;
  letter-spacing: 0.05em;
}

.calc-preset:hover {
  background: #1a4a7a !important;
}

.calc-hero {
  display: flex;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.calc-hero-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #0a1628;
  border: 2px solid #0f3460;
  border-radius: 10px;
  padding: 1rem 2.5rem;
  min-width: 220px;
}

.calc-hero-label {
  font-size: 0.8rem;
  color: #7fb3d4;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.calc-hero-value {
  font-size: 2.2rem;
  font-weight: bold;
  font-family: monospace;
}

.calc-hero-good {
  color: #00ff88;
}

.calc-hero-warn {
  color: #ffaa00;
}

.calc-hero-bad {
  color: #ff4444;
}

.calc-hero-note {
  font-size: 0.75rem;
  color: #5a8faa;
  margin-top: 0.25rem;
}

.calc-help {
  margin-top: 1rem;
}

.calc-help-btn {
  background: #0f3460 !important;
  color: #7fb3d4 !important;
  font-size: 0.8rem;
  border: 1px solid #1a4a7a !important;
}

.calc-help-btn:hover {
  background: #1a4a7a !important;
  color: #00d4ff !important;
}

.calc-help-body {
  margin-top: 0.75rem;
  background: #0a1628;
  border: 1px solid #0f3460;
  border-radius: 6px;
  padding: 1rem 1.25rem;
}

.calc-help-list {
  margin: 0;
}

.calc-help-list dt {
  color: #00d4ff;
  font-weight: bold;
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

.calc-help-list dt:first-child {
  margin-top: 0;
}

.calc-help-list dd {
  color: #b0c4d8;
  font-size: 0.82rem;
  margin: 0.2rem 0 0 0;
  line-height: 1.45;
}

.calc-help-section-title {
  color: #00d4ff;
  font-size: 1rem;
  margin: 1.25rem 0 0.25rem 0;
  padding-top: 1rem;
  border-top: 1px solid #0f3460;
}

.calc-help-intro {
  color: #b0c4d8;
  font-size: 0.82rem;
  line-height: 1.45;
  margin: 0.25rem 0 0.75rem 0;
}

.calc-help-diagram {
  background: #060e1c;
  border: 1px solid #0f3460;
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.75rem;
  overflow-x: auto;
}

.calc-help-diagram pre {
  color: #7fb3d4;
  font-family: monospace;
  font-size: 0.72rem;
  line-height: 1.4;
  margin: 0;
  white-space: pre;
}

.calc-help-byte-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.4rem;
  font-size: 0.78rem;
}

.calc-help-byte-table th {
  background: #0a1628;
  color: #7fb3d4;
  text-align: left;
  padding: 0.3rem 0.5rem;
  border: 1px solid #0f3460;
  font-weight: normal;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.calc-help-byte-table td {
  padding: 0.25rem 0.5rem;
  border: 1px solid #0f3460;
  color: #b0c4d8;
}

.calc-help-byte-table tr:nth-child(even) td {
  background: #0a1628;
}

.calc-help-byte-table td:first-child {
  color: #00d4ff;
  font-family: monospace;
  white-space: nowrap;
  width: 3rem;
}

.calc-help-byte-table td:nth-child(2) {
  font-family: monospace;
  color: #00ff88;
  white-space: nowrap;
  width: 6rem;
}

/* Hardware Reference Tables */
#hardware-section,
#signal-path-section {
  background: #121a30;
}

.hw-table-scroll {
  overflow-x: auto;
  margin-bottom: 1rem;
  -webkit-overflow-scrolling: touch;
}

.hw-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
  font-size: 0.82rem;
}

.hw-table thead th {
  background: #060e1c;
  color: #7fb3d4;
  padding: 0.4rem 0.6rem;
  border: 1px solid #0f3460;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.hw-table tbody td {
  padding: 0.35rem 0.6rem;
  border: 1px solid #0f3460;
  color: #b0c4d8;
  white-space: nowrap;
}

.hw-table tbody tr:nth-child(even) td {
  background: rgba(15, 52, 96, 0.2);
}

.hw-table tbody tr:hover td {
  background: rgba(0, 212, 255, 0.06);
}

.hw-incompatible td {
  opacity: 0.7;
}

.hw-cell-warn {
  color: #ff4444 !important;
  font-weight: 600;
}

/* Instrument Group Editor */
.group-card {
  background: #0a1628;
  border: 1px solid #1b3a5c;
  border-radius: 6px;
  padding: 0.75rem;
  margin-bottom: 0.75rem;
}

.group-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.group-name-input {
  flex: 1;
  background: #0d1b2a;
  color: #e0e0e0;
  border: 1px solid #1b3a5c;
  border-radius: 3px;
  padding: 0.3rem 0.5rem;
  font-size: 0.9rem;
}

.group-mac-input {
  width: 160px;
  background: #0d1b2a;
  color: #e0e0e0;
  border: 1px solid #1b3a5c;
  border-radius: 3px;
  padding: 0.3rem 0.5rem;
  font-size: 0.9rem;
  font-family: monospace;
}

.group-preview-btn {
  background: #0f3460;
  color: #00d4ff;
  border: 1px solid #1b3a5c;
}

.group-preview-btn:hover {
  background: #1a4a7a;
}

.group-name-input:focus,
.group-mac-input:focus {
  outline: none;
  border-color: #00d4ff;
}

.group-name-input.invalid,
.group-mac-input.invalid {
  border-color: #ff4444;
  background: rgba(255, 68, 68, 0.1);
}

.group-notes-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
}

.group-notes-table thead th {
  text-align: left;
  padding: 0.3rem 0.4rem;
  background: #0d1b2a;
  color: #7fb3d4;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.group-notes-table tbody td {
  padding: 0.25rem 0.4rem;
}

.group-notes-table tbody tr:nth-child(even) {
  background: rgba(15, 52, 96, 0.3);
}

.note-config-panel {
  background: #0d1b2a;
  border: 1px solid #1b3a5c;
  border-radius: 4px;
  padding: 0.6rem 0.75rem;
  margin-bottom: 0.4rem;
}

.note-config-panel .config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.4rem 0.75rem;
  align-items: center;
}

.note-config-panel .config-grid label {
  font-size: 0.8rem;
  color: #7fb3d4;
}

.note-config-panel canvas {
  display: block;
  margin-top: 0.5rem;
  border: 1px solid #1b3a5c;
  border-radius: 3px;
}

.group-cc-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
}

.group-cc-table thead th {
  text-align: left;
  padding: 0.3rem 0.4rem;
  background: #0d1b2a;
  color: #7fb3d4;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.group-cc-table tbody td {
  padding: 0.25rem 0.4rem;
}

.group-cc-table tbody tr:nth-child(even) {
  background: rgba(15, 52, 96, 0.3);
}

.group-section-label {
  color: #7fb3d4;
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0.5rem 0 0.25rem 0;
}

.narrow-input {
  width: 60px !important;
  background: #0a1628;
  color: #e0e0e0;
  border: 1px solid #1b3a5c;
  border-radius: 3px;
  padding: 0.25rem 0.3rem;
  font-size: 0.85rem;
}

.narrow-input:focus {
  outline: none;
  border-color: #00d4ff;
}

#groups-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

/* Per-client LED Grid */
.client-led-grid {
  display: block;
  margin: 0.4rem 0 0.3rem;
  background: #111;
  border: 1px solid #0f3460;
  border-radius: 3px;
}

.client-cmd-log {
  margin-top: 0.25rem;
  font-size: 0.75rem;
}

.client-cmd-log summary {
  cursor: pointer;
  color: #7fb3d4;
  user-select: none;
  padding: 0.15rem 0;
}

.client-cmd-log summary:hover {
  color: #00d4ff;
}

.cmd-log-entries {
  max-height: 160px;
  overflow-y: auto;
  padding: 0.2rem 0;
}

.cmd-entry {
  font-family: monospace;
  font-size: 0.72rem;
  line-height: 1.5;
  padding: 0 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.cmd-trigger {
  color: #00d4ff;
}

.cmd-release {
  color: #666;
}

.cmd-swatch {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* Hidden utility */
.hidden {
  display: none !important;
}

/* Status bar */
#status-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: #0a1628;
  border-radius: 6px;
  margin-top: 1rem;
  font-size: 0.85rem;
}

.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.connected {
  background: #00e676;
  box-shadow: 0 0 6px rgba(0, 230, 118, 0.5);
}

.status-dot.disconnected {
  background: #ff4444;
  box-shadow: 0 0 6px rgba(255, 68, 68, 0.5);
}

#last-save {
  margin-left: auto;
  color: #7fb3d4;
}

/* Flash feedback */
.flash-success {
  animation: flashGreen 0.6s ease;
}

.flash-error {
  animation: flashRed 0.6s ease;
}

@keyframes flashGreen {
  0% { background: rgba(0, 230, 118, 0.3); }
  100% { background: transparent; }
}

@keyframes flashRed {
  0% { background: rgba(255, 68, 68, 0.3); }
  100% { background: transparent; }
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0.5rem;
  }

  header h1 {
    font-size: 1.2rem;
  }

  section {
    padding: 0.75rem;
  }

  table {
    font-size: 0.85rem;
  }

  td input[type="number"],
  td input[type="text"],
  td select {
    font-size: 0.85rem;
    padding: 0.25rem 0.3rem;
  }

  .param-slider-grid {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
    max-width: 100%;
  }
}

/* ── Expandable Release Notes (details/summary) ── */
.release-details {
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.release-details > summary {
  padding: 0.75rem 1rem;
  background: var(--card-bg);
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  user-select: none;
}

.release-details > summary::-webkit-details-marker { display: none; }

.release-details > summary::before {
  content: "\25B6";
  font-size: 0.7rem;
  transition: transform 0.2s;
}

.release-details[open] > summary::before {
  transform: rotate(90deg);
}

.release-details > summary:hover {
  background: var(--hover-bg);
}

.release-details .release-body {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
}

.release-details .release-body h4 {
  margin: 0.75rem 0 0.35rem 0;
  font-size: 0.9rem;
  color: var(--text);
}

.release-details .release-body h4:first-child {
  margin-top: 0;
}

.release-details .release-body ul {
  margin: 0 0 0.5rem 1.25rem;
  padding: 0;
  font-size: 0.85rem;
  line-height: 1.6;
}

.release-details .release-body p {
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 0.5rem 0;
}

.release-note-warning {
  background: #332b00;
  border: 1px solid #665500;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  color: #ffcc00;
  margin-top: 0.75rem;
}

/* WiFi Channel Management */
.channel-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.scan-status {
  font-size: 0.85em;
  color: #888;
}
.channel-scan-results { margin: 1rem 0; }
.channel-table {
  width: 100%;
  border-collapse: collapse;
}
.channel-table th,
.channel-table td {
  padding: 0.4rem 0.6rem;
  text-align: left;
  border-bottom: 1px solid #0f3460;
}
.channel-table tr.current-channel {
  background: rgba(0, 255, 128, 0.1);
  font-weight: bold;
}
.channel-table tr.best-channel {
  border-left: 3px solid #00d4ff;
}
.interference-bar {
  display: inline-block;
  height: 12px;
  border-radius: 2px;
  min-width: 4px;
}
.interference-low { background: #2d7d2d; }
.interference-med { background: #c8a000; }
.interference-high { background: #c83030; }
.btn-use-channel {
  padding: 0.2rem 0.6rem;
  font-size: 0.8em;
  cursor: pointer;
  background: #1a1a2e;
  color: #e0e0e0;
  border: 1px solid #0f3460;
  border-radius: 3px;
}
.btn-use-channel:hover { background: #00d4ff; color: #000; }
.auto-channel-settings {
  margin-top: 1rem;
  padding: 0.8rem;
  border: 1px solid #0f3460;
  border-radius: 4px;
}
.auto-channel-settings h3 { margin: 0 0 0.5rem 0; font-size: 1em; }
.toggle-label { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; }
.threshold-row { display: flex; align-items: center; gap: 0.5rem; }
.small-input { width: 60px; }