/**
 * 5G NR Gold Sequence Scrambling Visualizer — TS 38.211
 * Scoped styles for #gold-tutorial. Engineering Dashboard / CRT aesthetic.
 */
#gold-tutorial {
  max-width: 800px;
  font-family: 'Courier New', Courier, monospace;
  background: #0a0a0a;
  color: #fff;
  padding: 16px;
  border: 1px solid #333;
  border-radius: 8px;
  box-sizing: border-box;
}

#gold-tutorial * {
  box-sizing: border-box;
}

/* Control panel: one row per parameter */
#gold-tutorial .gold-control-panel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-bottom: 16px;
  padding: 12px;
  background: #161616;
  border: 1px solid #333;
  border-radius: 6px;
}

#gold-tutorial .gold-control-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

#gold-tutorial .gold-control-row label {
  font-size: 12px;
  color: #fff;
  white-space: nowrap;
}

#gold-tutorial .gold-control-row input[type="number"],
#gold-tutorial .gold-control-row select {
  width: 100px;
  padding: 6px 8px;
  font-family: 'Courier New', monospace;
  font-size: 12px;
  background: #0a0a0a;
  border: 1px solid #333;
  color: #fff;
  border-radius: 4px;
}

#gold-tutorial .gold-control-row select {
  width: auto;
  min-width: 120px;
}

#gold-tutorial .gold-btn {
  padding: 8px 14px;
  font-family: 'Courier New', monospace;
  font-size: 12px;
  background: #0a0a0a;
  border: 1px solid #00ff41;
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

#gold-tutorial .gold-btn:hover {
  background: #00ff41;
  color: #0a0a0a;
}

#gold-tutorial .gold-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#gold-tutorial .gold-btn.primary {
  border-color: #00ff41;
  font-weight: bold;
}

#gold-tutorial .gold-speed-label {
  font-size: 12px;
  color: #fff;
  margin-right: 8px;
}

#gold-tutorial .gold-speed-slider {
  width: 100px;
  accent-color: #00ff41;
  vertical-align: middle;
}

#gold-tutorial .gold-speed-value {
  font-size: 12px;
  color: #00ff41;
  min-width: 2em;
  font-family: 'Courier New', monospace;
}

/* Scenario panel (PDSCH params) */
#gold-tutorial .gold-scenario-panel {
  margin-bottom: 16px;
  padding: 12px;
  background: #161616;
  border: 1px solid #333;
  border-radius: 6px;
}

#gold-tutorial .gold-scenario-panel .gold-section-label {
  font-size: 11px;
  color: #fff;
  margin-bottom: 8px;
}

#gold-tutorial .gold-pdsch-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin-top: 8px;
}

/* Mathematical Trace / Live Calculation panel */
#gold-tutorial .gold-math-trace-panel {
  background: rgba(22, 22, 22, 0.95);
  border: 1px solid rgba(0, 255, 65, 0.35);
  border-radius: 8px;
  padding: 16px;
  margin: 16px 0;
  font-family: 'Courier New', Courier, monospace;
}

#gold-tutorial .gold-math-trace-title {
  margin: 0 0 12px 0;
  font-size: 14px;
  color: #ff00ff;
  font-weight: bold;
}

#gold-tutorial .gold-math-formula {
  font-size: 13px;
  color: #fff;
  text-align: center;
  margin-bottom: 12px;
  line-height: 1.5;
}

#gold-tutorial .gold-math-params {
  width: 100%;
  font-size: 11px;
  color: #fff;
  border-collapse: collapse;
  margin-bottom: 12px;
}

#gold-tutorial .gold-math-params th,
#gold-tutorial .gold-math-params td {
  border: 1px solid #333;
  padding: 6px 8px;
  text-align: left;
}

#gold-tutorial .gold-math-params th {
  background: #1a1a1a;
  color: #fff;
}

#gold-tutorial .gold-math-plugged {
  font-size: 12px;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.5;
}

#gold-tutorial .gold-math-result {
  font-size: 14px;
  font-weight: bold;
  color: #fff;
  margin-bottom: 8px;
}

#gold-tutorial .gold-math-result #gold-math-cinit-val {
  color: #00ff41;
}

#gold-tutorial .gold-math-bit-note {
  font-size: 11px;
  color: #00d4ff;
  border-left: 3px solid #00d4ff;
  padding-left: 10px;
  margin-top: 10px;
  line-height: 1.4;
}

/* Gold Sequence Formulas panel (formula, plugged in, result) */
#gold-tutorial .gold-formula-panel {
  background: rgba(22, 22, 22, 0.95);
  border: 1px solid rgba(0, 255, 65, 0.35);
  border-radius: 8px;
  padding: 16px;
  margin: 16px 0;
  font-family: 'Courier New', Courier, monospace;
  overflow-x: hidden;
}

#gold-tutorial .gold-formula-panel-title {
  margin: 0 0 12px 0;
  font-size: 14px;
  color: #fff;
  font-weight: bold;
}

#gold-tutorial .gold-formula-table {
  width: 100%;
  font-size: 12px;
  color: #fff;
  border-collapse: collapse;
  table-layout: fixed;
}

#gold-tutorial .gold-formula-table th,
#gold-tutorial .gold-formula-table td {
  border: 1px solid #333;
  padding: 10px 12px;
  vertical-align: middle;
  overflow-wrap: break-word;
  word-wrap: break-word;
  overflow: hidden;
}

#gold-tutorial .gold-formula-table th:nth-child(1),
#gold-tutorial .gold-formula-table td:nth-child(1) {
  width: 45%;
}

#gold-tutorial .gold-formula-table th:nth-child(2),
#gold-tutorial .gold-formula-table td:nth-child(2) {
  width: 55%;
}

#gold-tutorial .gold-formula-table th {
  background: #1a1a1a;
  color: #fff;
  font-weight: bold;
}

#gold-tutorial .gold-formula-table .gold-formula-expr {
  font-style: normal;
  line-height: 1.5;
}

#gold-tutorial .gold-formula-table .gold-formula-plugged {
  color: #ccc;
  line-height: 1.5;
}

#gold-tutorial .gold-formula-table .mono-font {
  font-family: 'Courier New', Courier, monospace;
  color: #00ff41;
}

/* Logic overlay: SVG lines + register rows + XOR gates */
#gold-tutorial .gold-logic-overlay-container {
  position: relative;
  padding: 40px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
  margin-bottom: 20px;
  background: #121212;
  border: 1px solid #333;
  border-radius: 6px;
}

#gold-tutorial .gold-logic-svg {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

#gold-tutorial .logic-gate-area {
  position: relative;
  width: 100%;
  min-height: 80px;
  flex-shrink: 0;
}

#gold-tutorial .xor-gate {
  position: absolute;
  width: 40px;
  height: 40px;
  border: 2px solid #ff00ff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ff00ff;
  font-weight: bold;
  font-size: 24px;
  background: #0a0a0a;
}

/* Arrange each gate separately: left/top as % or px (from top-left of .logic-gate-area) */
#gold-tutorial #xor-x1 {
  left: 10%;
  top: 10%;
  transform: translate(-50%, -50%);
}

#gold-tutorial #xor-x2 {
  left: 10%;
  top: 100%;
  transform: translate(-50%, -50%);
}

#gold-tutorial .gold-feedback-result-box {
  position: absolute;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Courier New', Courier, monospace;
  font-size: 20px;
  font-weight: bold;
  color: #ff00ff;
  background: #0a0a0a;
  border: 2px solid #ff00ff;
  border-radius: 6px;
  box-shadow: 0 0 6px rgba(255, 0, 255, 0.3);
}

#gold-tutorial #gold-result-x1 {
  left: 22%;
  top: 10%;
  transform: translate(-50%, -50%);
}

#gold-tutorial #gold-result-x2 {
  left: 22%;
  top: 100%;
  transform: translate(-50%, -50%);
}

#gold-tutorial #xor-main {
  left: 25%;
  top: 50%;
  transform: translate(-50%, -50%);
}

#gold-tutorial .gold-main-result-box {
  position: absolute;
  left: 45%;
  top: 50%;
  transform: translate(-50%, -50%);
  min-width: 48px;
  height: 40px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Courier New', Courier, monospace;
  font-size: 24px;
  font-weight: bold;
  color: #00ff41;
  background: #0a0a0a;
  border: 2px solid #00ff41;
  border-radius: 6px;
  box-shadow: 0 0 8px rgba(0, 255, 65, 0.3);
}

#gold-tutorial .gold-main-result-box.active {
  box-shadow: 0 0 12px #00ff41;
}

#gold-tutorial .gold-main-result-box.gold-main-result-box-na {
  color: #888;
  border-color: #666;
}

#gold-tutorial .gold-output-bit.gold-output-bit-na {
  color: #888;
  border-color: #666;
}

#gold-tutorial .gold-status-label {
  font-size: 12px;
  color: #00ff41;
  margin-bottom: 10px;
  padding: 6px 10px;
  background: #0a0a0a;
  border: 1px solid #333;
  border-radius: 4px;
  font-family: 'Courier New', Courier, monospace;
}

/* Register containers */
#gold-tutorial .gold-register-block {
  margin-bottom: 20px;
  padding: 12px;
  background: #121212;
  border: 1px solid #333;
  border-radius: 6px;
  overflow-x: hidden;
}

#gold-tutorial .gold-register-label {
  font-size: 12px;
  color: #fff;
  margin-bottom: 8px;
}

#gold-tutorial .gold-bit-row,
#gold-tutorial .register-row {
  display: flex;
  flex-wrap: nowrap;
  gap: 3px;
  align-items: flex-end;
  margin: 8px 0;
  min-width: min-content;
}

#gold-tutorial .gold-logic-overlay-container .gold-register-label {
  margin-bottom: 0;
}

/* Wrapper: cell + index label (bit mapping overlay) */
#gold-tutorial .gold-bit-cell-wrap {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  flex-shrink: 0;
}

#gold-tutorial .gold-bit-cell-index {
  font-size: 8px;
  color: #fff;
  opacity: 0.85;
  line-height: 1;
  min-width: 12px;
  text-align: center;
}

/* Bit cells: index 0 = output (left), index 30 = newest (right) — scaled to fit 31 in one line */
#gold-tutorial .gold-bit-cell {
  width: 21px;
  height: 24px;
  border: 1px solid #444;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: bold;
  transition: background 0.1s, box-shadow 0.1s;
  background: #0a0a0a;
  color: #fff;
}

#gold-tutorial .gold-bit-cell.active {
  background: #00ff41;
  color: #0a0a0a;
  box-shadow: 0 0 8px #00ff41;
}

#gold-tutorial .gold-bit-cell.tap {
  border-color: #ff00ff;
  border-width: 2px;
}

#gold-tutorial .gold-bit-cell.tap.active {
  box-shadow: 0 0 8px #00ff41, 0 0 0 1px #ff00ff;
}

/* Bit mapping explanation (under register rows) */
#gold-tutorial .gold-bit-mapping-note {
  font-size: 10px;
  color: #fff;
  margin-top: 10px;
  padding: 6px 8px;
  background: #161616;
  border: 1px solid #333;
  border-radius: 4px;
  line-height: 1.4;
}

/* XOR gate visual */
#gold-tutorial .gold-xor-gate {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid #ff00ff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 8px;
  font-size: 14px;
  color: #ff00ff;
  flex-shrink: 0;
  transition: box-shadow 0.15s ease;
}

#gold-tutorial .gold-xor-gate.gold-xor-pulse {
  box-shadow: 0 0 16px #ff00ff, 0 0 24px rgba(255, 0, 255, 0.6);
}

/* Logic flow row: x1 output → XOR ← x2 output → c(n) */
#gold-tutorial .gold-output-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 16px 0;
  padding: 12px;
  background: #161616;
  border: 1px solid #333;
  border-radius: 6px;
}

#gold-tutorial .gold-output-label {
  font-size: 11px;
  color: #fff;
  margin-right: 4px;
}

#gold-tutorial .gold-output-bit {
  width: 28px;
  height: 28px;
  border: 1px solid #444;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: bold;
  background: #0a0a0a;
  color: #fff;
}

#gold-tutorial .gold-output-bit.active {
  background: #00ff41;
  color: #0a0a0a;
}

/* Bit stream (scrolling output c(n)) */
#gold-tutorial .gold-stream-container {
  min-height: 56px;
  padding: 10px;
  background: #0a0a0a;
  border: 1px inset #333;
  border-radius: 4px;
  overflow-x: hidden;
  overflow-y: hidden;
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
  flex-wrap: nowrap;
  gap: 2px;
}

#gold-tutorial .gold-stream-bit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 14px;
  height: 20px;
  font-size: 11px;
  font-weight: bold;
  color: #fff;
  background: #1a1a1a;
  border-radius: 2px;
}

#gold-tutorial .gold-stream-bit.on {
  color: #0a0a0a;
  background: #00ff41;
}

#gold-tutorial .gold-stream-label {
  font-size: 11px;
  color: #fff;
  margin-top: 6px;
  margin-bottom: 4px;
}

/* Skip warm-up toggle */
/* Start mode option group (Start from n=0 / Start from n=Nc) */
#gold-tutorial .gold-start-option-group {
  display: flex;
  align-items: center;
  gap: 12px 20px;
  flex-wrap: wrap;
}

#gold-tutorial .gold-option-group-label {
  font-size: 12px;
  color: #fff;
  margin-right: 4px;
}

#gold-tutorial .gold-radio-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #fff;
  cursor: pointer;
}

#gold-tutorial .gold-radio-label input[type="radio"] {
  accent-color: #00ff41;
  cursor: pointer;
}

/* Formula / info footer */
#gold-tutorial .gold-formula-footer {
  font-size: 11px;
  color: #fff;
  margin-top: 16px;
  padding: 10px;
  border-top: 1px solid #333;
}

#gold-tutorial .gold-formula-footer code {
  color: #fff;
}