/* Styles for the technical manual diagrams and tables. */
.techref-content {
  font-family: var(--sans);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.techref-content h2 {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--text-bright);
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.techref-content h3 {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-bright);
  margin: 28px 0 12px;
}

.techref-content h4 {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-bright);
  margin: 20px 0 8px;
}

.techref-content p {
  margin: 8px 0 12px;
  font-size: 14.5px;
}

.techref-content .section-intro {
  font-size: 15px;
  color: var(--text-dim);
  margin-bottom: 20px;
  max-width: 780px;
}

.techref-content ul {
  margin: 8px 0 16px 20px;
  font-size: 14.5px;
}

.techref-content ol {
  margin: 8px 0 16px 20px;
  font-size: 14.5px;
}

.techref-content li {
  margin-bottom: 4px;
}

.techref-content code {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--orange);
}

.techref-content pre {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 20px;
  margin: 12px 0 16px;
  overflow-x: auto;
  color: var(--text);
  line-height: 1.7;
}

.techref-content a {
  color: var(--accent) !important;
}

.techref-content .toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 32px;
}

.techref-content .toc-title {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.techref-content .toc ol {
  list-style: decimal;
  margin-left: 20px;
}

.techref-content .toc li {
  margin-bottom: 6px;
}

.techref-content .toc a {
  color: var(--accent) !important;
  text-decoration: none;
  font-size: 14px;
}

.techref-content .toc a:hover {
  text-decoration: underline;
}

.techref-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin: 16px 0 20px;
}

.techref-content thead th {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  background: var(--surface-2);
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.techref-content tbody td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: var(--text);
}

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

.techref-content tbody tr:hover {
  background: rgba(255,255,255,0.015);
}

.techref-content td.region {
  font-family: var(--mono);
  font-weight: 600;
  white-space: nowrap;
  font-size: 13px;
}

.techref-content td.dur {
  font-family: var(--mono);
  color: var(--cyan);
  white-space: nowrap;
  font-size: 12.5px;
}

.techref-content td.num {
  font-family: var(--mono);
  color: var(--text-dim);
  font-size: 12px;
  width: 32px;
  text-align: center;
}

.techref-content td.digit {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--text-bright);
  text-align: center;
  width: 44px;
}

.techref-content td.idx {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--cyan);
  text-align: center;
}

.techref-content .card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 22px;
  margin: 16px 0;
}

.techref-content .card.green {
  border-left: 3px solid var(--green);
}

.techref-content .card.accent {
  border-left: 3px solid var(--accent);
}

.techref-content .card-title {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 8px;
}

.techref-content .card p {
  font-size: 14px;
  color: var(--text);
}

.techref-content .figure {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin: 16px 0;
  text-align: center;
  overflow-x: auto;
}

.techref-content .figure img {
  max-width: 100%;
  height: auto;
}

.techref-content .figure-caption {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
  margin-top: 10px;
}

.techref-content .equation {
  font-family: var(--mono);
  font-size: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 20px;
  margin: 12px 0 16px;
  color: var(--cyan);
  line-height: 1.8;
}

.techref-content .comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
}

@media (max-width: 700px) {
  .techref-content .comparison {
    grid-template-columns: 1fr;
  }
}

.techref-content .comparison > div {
  padding: 14px 18px;
  background: var(--surface);
  border-radius: 6px;
}

.techref-content .comparison .label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.techref-content .badge {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.techref-content .badge-excellent {
  background: rgba(63,185,80,0.15);
  color: var(--green);
  border: 1px solid var(--green-dim);
}

.techref-content .badge-good {
  background: rgba(88,166,255,0.1);
  color: var(--accent);
  border: 1px solid var(--accent-dim);
}

.techref-content .badge-fair {
  background: rgba(210,153,34,0.15);
  color: var(--orange);
  border: 1px solid var(--orange-dim);
}

.techref-content .badge-poor {
  background: rgba(244,112,103,0.15);
  color: var(--red);
  border: 1px solid rgba(244,112,103,0.3);
}

.techref-content .badge-bad {
  background: rgba(219,97,162,0.15);
  color: var(--pink);
  border: 1px solid var(--pink-dim);
}

.techref-content .timeline-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  overflow-x: auto;
  margin-bottom: 24px;
}

.techref-content .timeline {
  display: flex;
  align-items: stretch;
  min-width: 820px;
  height: 54px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.techref-content .timeline .seg {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  line-height: 1.35;
  text-align: center;
  padding: 4px 2px;
  border-right: 1px solid rgba(255,255,255,0.06);
  position: relative;
  transition: filter 0.15s;
}

.techref-content .timeline .seg:last-child {
  border-right: none;
}

.techref-content .timeline .seg:hover {
  filter: brightness(1.2);
}

.techref-content .timeline .seg .label {
  font-size: 8.5px;
  opacity: 0.7;
  margin-top: 1px;
}

.techref-content .seg.silence {
  background: var(--surface-2);
  color: var(--text-dim);
}

.techref-content .seg.prn {
  background: var(--accent-dim);
  color: var(--accent);
}

.techref-content .seg.dtmf {
  background: var(--purple-dim);
  color: var(--purple);
}

.techref-content .seg.burst {
  background: var(--green-dim);
  color: var(--green);
}

.techref-content .seg.noise {
  background: var(--orange-dim);
  color: var(--orange);
}

.techref-content .timeline-legend {
  display: flex;
  gap: 16px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.techref-content .timeline-legend .item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--text-dim);
  font-family: var(--mono);
}

.techref-content .timeline-legend .dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.techref-content .dot.silence {
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.techref-content .dot.prn {
  background: var(--accent-dim);
  border: 1px solid var(--accent);
}

.techref-content .dot.dtmf {
  background: var(--purple-dim);
  border: 1px solid var(--purple);
}

.techref-content .dot.burst {
  background: var(--green-dim);
  border: 1px solid var(--green);
}

.techref-content .dot.noise {
  background: var(--orange-dim);
  border: 1px solid var(--orange);
}

.techref-content .note {
  font-size: 13px;
  color: var(--text-dim);
  padding: 12px 16px;
  border-left: 3px solid var(--accent-dim);
  background: rgba(88,166,255,0.03);
  border-radius: 0 6px 6px 0;
  margin-top: 16px;
}

.techref-content .note strong {
  color: var(--accent);
  font-weight: 600;
}

.techref-content .dtmf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 700px) {
  .techref-content .dtmf-grid {
    grid-template-columns: 1fr;
  }
}

.techref-content .dtmf-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 20px;
}

.techref-content .dtmf-card .band-label {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
}

.techref-content .dtmf-card .band-range {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 12px;
  font-family: var(--mono);
}

.techref-content .dtmf-card .freq-group {
  margin-bottom: 8px;
}

.techref-content .dtmf-card .freq-group .group-label {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.techref-content .dtmf-card .freq-list {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.techref-content .dtmf-card .freq-chip {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: var(--surface-2);
}

.techref-content .dtmf-card.low  .band-label {
  color: var(--green);
}

.techref-content .dtmf-card.low  .freq-chip {
  color: var(--green);
  border-color: var(--green-dim);
}

.techref-content .dtmf-card.mid  .band-label {
  color: var(--orange);
}

.techref-content .dtmf-card.mid  .freq-chip {
  color: var(--orange);
  border-color: var(--orange-dim);
}

.techref-content .dtmf-card.high .band-label {
  color: var(--pink);
}

.techref-content .dtmf-card.high .freq-chip {
  color: var(--pink);
  border-color: var(--pink-dim);
}

.techref-content .diff-callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-top: 20px;
}

.techref-content .diff-callout h4 {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 10px;
}

.techref-content .diff-callout ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.techref-content .diff-callout li {
  font-size: 13.5px;
  color: var(--text);
  padding: 4px 0 4px 18px;
  position: relative;
}

.techref-content .diff-callout li::before {
  content: '\2192';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
}

.techref-content .diagram-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 24px;
  overflow-x: auto;
}

.techref-content .diagram-wrap svg {
  display: block;
  margin: 0 auto;
}

.techref-content .diagram-caption {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
  margin-top: 12px;
}

.techref-content .formula {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--cyan);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 6px;
  display: inline-block;
  margin: 8px 0;
}

.techref-content .pipeline {
  display: flex;
  gap: 0;
  align-items: center;
  flex-wrap: wrap;
  margin: 16px 0;
}

.techref-content .pipeline .step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text);
  text-align: center;
  line-height: 1.4;
}

.techref-content .pipeline .step .step-label {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.techref-content .pipeline .step .step-val {
  color: var(--cyan);
  font-weight: 600;
}

.techref-content .pipeline .arrow {
  font-size: 16px;
  color: var(--text-dim);
  padding: 0 6px;
}

.techref-content .divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

.techref-content .badge-row {
  display: flex;
  gap: 8px;
  margin: 12px 0 16px;
  flex-wrap: wrap;
}

.techref-content .badge-row .badge {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
}

.techref-content .badge-row .badge.blue {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: rgba(88,166,255,0.06);
}

.techref-content .badge-row .badge.green {
  color: var(--green);
  border-color: var(--green-dim);
  background: rgba(63,185,80,0.06);
}

.techref-content .section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 48px 0 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.techref-content .section-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.techref-content .icon-gen {
  background: rgba(88,166,255,0.15);
  border: 1px solid var(--accent);
}

.techref-content .icon-ana {
  background: rgba(86,212,221,0.15);
  border: 1px solid var(--cyan);
}

.techref-content .icon-cmp {
  background: rgba(208,32,144,0.15);
  border: 1px solid var(--magenta);
}

.techref-content .icon-view {
  background: rgba(240,192,64,0.12);
  border: 1px solid var(--gold);
}

.techref-content .icon-dir {
  background: rgba(63,185,80,0.12);
  border: 1px solid var(--green);
}

.techref-content .icon-cli {
  background: rgba(128,128,255,0.12);
  border: 1px solid #8888ff;
}

.techref-content .section-header h2 {
  border-bottom: none;
  margin: 0;
  padding: 0;
}

.techref-content .cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.techref-content .cards .card {
  transition: border-color 0.2s, transform 0.15s;
}

.techref-content .cards .card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.techref-content .cards .card-title {
  font-family: var(--cond), var(--mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 6px;
}

.techref-content .cards .card-title.magenta {
  color: var(--magenta);
}

.techref-content .cards .card-title.gold {
  color: var(--gold);
}

.techref-content .cards .card-title.green {
  color: var(--green);
}

.techref-content .cards .card-title.blue {
  color: #8888ff;
}

.techref-content .param-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  font-size: 14px;
}

.techref-content .param-table thead tr {
  background: var(--surface-2);
  border-bottom: 1px solid var(--accent);
}

.techref-content .param-table th {
  text-align: left;
  padding: 10px 14px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
}

.techref-content .param-table td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(42,49,64,0.5);
  vertical-align: top;
  color: var(--text);
}

.techref-content .param-table tr:last-child td {
  border-bottom: none;
}

.techref-content .param-table tr:hover td {
  background: rgba(88,166,255,0.04);
}

.techref-content .default-badge {
  font-family: var(--mono);
  font-size: 11px;
  background: rgba(88,166,255,0.15);
  border: 1px solid var(--accent);
  color: var(--cyan);
  padding: 1px 7px;
  border-radius: 3px;
  white-space: nowrap;
}

.techref-content .workflow {
  display: flex;
  gap: 0;
  margin: 24px 0;
  overflow-x: auto;
}

.techref-content .workflow-step {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-right: none;
  padding: 14px 18px;
  flex: 1;
  min-width: 140px;
  position: relative;
}

.techref-content .workflow-step:first-child {
  border-radius: 6px 0 0 6px;
}

.techref-content .workflow-step:last-child {
  border-radius: 0 6px 6px 0;
  border-right: 1px solid var(--border);
}

.techref-content .workflow-step::after {
  content: '\25B6';
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 12px;
  z-index: 1;
}

.techref-content .workflow-step:last-child::after {
  display: none;
}

.techref-content .workflow-step .step-num {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-dim);
  display: block;
  margin-bottom: 4px;
  letter-spacing: 1px;
}

.techref-content .workflow-step .step-label {
  font-family: var(--cond), var(--mono);
  font-weight: 700;
  font-size: 13px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.techref-content .workflow-step p {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}

.techref-content .cli-block {
  background: #0a0f18;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 24px;
  margin-top: 16px;
  overflow-x: auto;
}

.techref-content .cli-block pre {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--green);
  line-height: 1.8;
  margin: 0;
  background: none;
  border: none;
  padding: 0;
}

.techref-content .cli-block .comment {
  color: var(--text-dim);
}

.techref-content .cli-block .flag {
  color: var(--cyan);
}

.techref-content .cli-block .value {
  color: var(--gold);
}

.techref-content .tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 3px;
  margin: 2px;
  border: 1px solid;
}

.techref-content .tag-dir {
  color: var(--green);
  border-color: var(--green);
  background: rgba(63,185,80,0.1);
}

.techref-content .tag-svg {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(86,212,221,0.1);
}

.techref-content .tag-png {
  color: var(--gold);
  border-color: var(--gold);
  background: rgba(240,192,64,0.1);
}

.techref-content .tag-wav {
  color: var(--green);
  border-color: var(--green);
  background: rgba(63,185,80,0.1);
}

.techref-content .table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 20px;
}

.techref-content .table-wrap table {
  border: none;
  border-radius: 0;
  margin: 0;
}