:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --text2: #8b949e;
  --accent: #58a6ff;
  --green: #3fb950;
  --purple: #d2a8ff;
  --orange: #f0883e;
  --red: #f85149;
  --yellow: #d29922;
  --cyan: #79c0ff;
}

/* ── Light theme overrides ──────────────────────────────────────────────────── */
[data-theme="light"] {
  --bg: #ffffff;
  --surface: #f6f8fa;
  --surface2: #eaeef2;
  --border: #d0d7de;
  --text: #1f2328;
  --text2: #57606a;
  --accent: #0969da;
  --green: #1a7f37;
  --purple: #8250df;
  --orange: #bc4c00;
  --red: #cf222e;
  --yellow: #9a6700;
  --cyan: #0550ae;
}

/* SVG node label overrides — hardcoded colors used in JS must be overridden here */
[data-theme="light"] .topo-svg text { fill: var(--text); }
[data-theme="light"] .topo-svg .topo-node circle + text { fill: #ffffff; } /* icon inside colored circle stays white */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.85em;
  background: var(--surface2);
  padding: 0.15em 0.35em;
  border-radius: 4px;
}

/* ── Navigation ───────────────────────────────────────────────────────────── */

nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  cursor: pointer;
  user-select: none;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
}

.nav-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text2);
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  transition: all 0.15s;
}
.nav-btn:hover { color: var(--text); background: var(--surface2); }
.nav-btn.active { color: var(--accent); border-color: var(--accent); }

.nav-wiki-link {
  margin-left: auto;
  font-size: 0.82rem;
  color: var(--text2);
  border: 1px solid var(--border);
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  transition: all 0.15s;
  white-space: nowrap;
  text-decoration: none;
}
.nav-wiki-link:hover { color: var(--text); background: var(--surface2); text-decoration: none; }

.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text2);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0.3rem 0.55rem;
  transition: all 0.15s;
  flex-shrink: 0;
}
.theme-toggle-btn:hover { background: var(--surface2); color: var(--text); }

.wasm-badge {
  font-size: 0.72rem;
  font-weight: 600;
  font-family: 'SFMono-Regular', Consolas, monospace;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text2);
  background: transparent;
  cursor: default;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.2s;
}
.wasm-badge-on {
  color: var(--green);
  border-color: var(--green);
  background: rgba(63, 185, 80, 0.08);
}

#search-box {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  width: 240px;
  font-size: 0.82rem;
  outline: none;
  transition: border-color 0.15s;
}
#search-box:focus { border-color: var(--accent); }
#search-box::placeholder { color: var(--text2); }

/* ── Layout ───────────────────────────────────────────────────────────────── */

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

.view { display: none; }
.view.active { display: block; }

/* ── Layer Map ────────────────────────────────────────────────────────────── */

.layer-section {
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.layer-header {
  padding: 0.5rem 1rem;
  font-weight: 600;
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.layer-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.layer-body {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.6rem;
  padding: 0.6rem;
}

.crate-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.7rem 0.8rem;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}
.crate-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.crate-card h3 {
  font-size: 0.88rem;
  margin-bottom: 0.2rem;
  font-weight: 600;
}

.crate-card .desc {
  font-size: 0.76rem;
  color: var(--text2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.badges {
  margin-top: 0.35rem;
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.62rem;
  padding: 0.12rem 0.35rem;
  border-radius: 3px;
  background: var(--surface2);
  color: var(--text2);
  border: 1px solid var(--border);
  white-space: nowrap;
}
.badge-green { color: var(--green); border-color: var(--green); }
.badge-accent { color: var(--accent); border-color: var(--accent); text-decoration: none; }
.badge-accent:hover { text-decoration: underline; }
.badge-wiki { color: var(--purple); border-color: var(--purple); text-decoration: none; }
.badge-wiki:hover { text-decoration: underline; }
.badge-api { color: var(--orange); border-color: var(--orange); text-decoration: none; }
.badge-api:hover { text-decoration: underline; }

/* ── Crate Detail ─────────────────────────────────────────────────────────── */

.back-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  margin-bottom: 1rem;
  transition: border-color 0.15s;
}
.back-btn:hover { border-color: var(--accent); }

.detail-header { margin-bottom: 1.25rem; }
.detail-header h1 { font-size: 1.4rem; margin-bottom: 0.2rem; }
.detail-header .desc { color: var(--text2); font-size: 0.9rem; }

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
@media (max-width: 768px) { .detail-grid { grid-template-columns: 1fr; } }

.detail-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem;
}
.detail-panel.full-width { grid-column: 1 / -1; }

.panel-title {
  font-size: 0.75rem;
  color: var(--text2);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.type-list {
  list-style: none;
}
.type-list li {
  padding: 0.15rem 0;
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.82rem;
}

.type-link {
  background: none;
  border: none;
  font-family: inherit;
  font-size: inherit;
  color: var(--purple);
  cursor: pointer;
  padding: 0;
  text-align: left;
}
.type-link:hover { text-decoration: underline; color: #e0b4ff; }

.dep-list { list-style: none; }
.dep-list li {
  padding: 0.2rem 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
}
.dep-arrow { color: var(--text2); font-size: 0.75rem; }
.dep-link {
  cursor: pointer;
  color: var(--accent);
  background: none;
  border: none;
  font: inherit;
  font-size: 0.85rem;
  padding: 0;
}
.dep-link:hover { text-decoration: underline; }

/* ── Dependency Graph ─────────────────────────────────────────────────────── */

.graph-container {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.graph-container canvas {
  display: block;
  width: 100%;
  cursor: grab;
}
.graph-container canvas:active { cursor: grabbing; }

.graph-legend {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(22, 27, 34, 0.92);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  font-size: 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text2);
}
.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.graph-tooltip {
  position: absolute;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.7rem;
  font-size: 0.78rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s;
  max-width: 280px;
  z-index: 10;
}
.graph-tooltip.visible { opacity: 1; }
.graph-tooltip .tt-name { font-weight: 600; margin-bottom: 0.15rem; }
.graph-tooltip .tt-desc { color: var(--text2); font-size: 0.72rem; }

/* ── Pipeline Trace ───────────────────────────────────────────────────────── */

/* Toolbar */
.pipeline-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
  flex-wrap: wrap;
}

.toolbar-label {
  font-size: 0.75rem;
  color: var(--text2);
  white-space: nowrap;
}

.pipe-select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
}
.pipe-select:focus { border-color: var(--accent); }
.pipe-select-sm { padding: 0.22rem 0.4rem; font-size: 0.78rem; }

.pipe-run-btn {
  background: var(--accent);
  border: none;
  color: #000;
  padding: 0.32rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  transition: opacity 0.15s;
}
.pipe-run-btn:hover { opacity: 0.85; }

.pipe-ctrl-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  transition: border-color 0.15s;
}
.pipe-ctrl-btn:hover { border-color: var(--accent); }

.pipe-speed-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: auto;
}

/* Two-column composer + knobs */
.pipeline-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
@media (max-width: 680px) { .pipeline-panels { grid-template-columns: 1fr; } }

.pipeline-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem;
}

/* Composer internals */
.composer-type-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.6rem;
}
.radio-label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.82rem;
  cursor: pointer;
  user-select: none;
}

.composer-field { margin-bottom: 0.5rem; }

.field-label {
  display: block;
  font-size: 0.68rem;
  color: var(--text2);
  margin-bottom: 0.18rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pipe-input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.28rem 0.5rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-family: 'SFMono-Regular', Consolas, monospace;
  outline: none;
  transition: border-color 0.15s;
}
.pipe-input:focus { border-color: var(--accent); }

.pipe-textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.28rem 0.5rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-family: 'SFMono-Regular', Consolas, monospace;
  outline: none;
  resize: vertical;
  transition: border-color 0.15s;
}
.pipe-textarea:focus { border-color: var(--accent); }

.slider-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.slider-row input[type=range] { flex: 1; accent-color: var(--accent); cursor: pointer; }
.slider-val {
  font-size: 0.72rem;
  color: var(--text2);
  min-width: 4.5em;
  text-align: right;
  white-space: nowrap;
  font-family: 'SFMono-Regular', Consolas, monospace;
}

.composer-check-row {
  display: flex;
  gap: 1.2rem;
  margin-bottom: 0.5rem;
}
.check-label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.82rem;
  cursor: pointer;
  user-select: none;
}

.composer-nonce-row { display: flex; align-items: center; gap: 0.4rem; }
.composer-nonce-row .field-label { margin-bottom: 0; flex-shrink: 0; }
.nonce-display {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.82rem;
  color: var(--text2);
}
.nonce-regen {
  background: none;
  border: none;
  color: var(--text2);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0 0.2rem;
  transition: color 0.15s;
}
.nonce-regen:hover { color: var(--accent); }

/* Knobs panel */
.knob-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
  min-height: 1.75rem;
}
.knob-label {
  font-size: 0.8rem;
  color: var(--text2);
  flex: 1;
  min-width: 0;
}

.toggle-btn {
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid;
  transition: all 0.15s;
  min-width: 2.8em;
  text-align: center;
  flex-shrink: 0;
}
.toggle-btn.on  { background: rgba(63,185,80,0.12); color: var(--green);  border-color: var(--green); }
.toggle-btn.off { background: var(--surface2);       color: var(--text2); border-color: var(--border); }

/* Simulation stage state animations */
@keyframes sim-pulse {
  0%   { box-shadow: 0 0 0 0   rgba(88,166,255,0.5); }
  60%  { box-shadow: 0 0 0 7px rgba(88,166,255,0);   }
  100% { box-shadow: 0 0 0 0   rgba(88,166,255,0);   }
}
@keyframes sim-pulse-exit {
  0%   { box-shadow: 0 0 0 0   rgba(248,81,73,0.5); }
  60%  { box-shadow: 0 0 0 7px rgba(248,81,73,0);   }
  100% { box-shadow: 0 0 0 0   rgba(248,81,73,0);   }
}

.stage-box.sim-current {
  border-color: var(--accent);
  background: rgba(88,166,255,0.08);
  animation: sim-pulse 0.75s ease-out;
}
.stage-box.sim-done {
  border-color: var(--green);
  background: rgba(63,185,80,0.04);
}
.stage-box.sim-done .stage-num { color: var(--green); }
.stage-box.sim-exit {
  border-color: var(--red);
  background: rgba(248,81,73,0.08);
  animation: sim-pulse-exit 0.75s ease-out;
}

/* Stage detail sim state grid */
.sim-state-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.2rem 0.6rem;
  margin-top: 0.5rem;
  padding: 0.45rem 0.6rem;
  background: var(--surface2);
  border-radius: 6px;
  border: 1px solid var(--border);
}
.sim-state-row {
  display: flex;
  gap: 0.3rem;
  align-items: baseline;
  font-size: 0.74rem;
  overflow: hidden;
}
.sim-state-key { color: var(--text2); flex-shrink: 0; }
.sim-state-key::after { content: ':'; }
.sim-state-val {
  font-family: 'SFMono-Regular', Consolas, monospace;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sim-terminal-note {
  margin-top: 0.45rem;
  font-size: 0.78rem;
  color: var(--text2);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.action-aggregated { color: var(--orange); border-color: var(--orange); }

.pipeline-section { margin-bottom: 2rem; }

.pipeline-heading {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pkt-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-weight: 600;
}
.pkt-interest { background: rgba(88, 166, 255, 0.15); color: var(--accent); }
.pkt-data { background: rgba(63, 185, 80, 0.15); color: var(--green); }

.pipeline-controls {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.ctrl-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  transition: border-color 0.15s;
}
.ctrl-btn:hover { border-color: var(--accent); }

.stage-flow {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.stage-box {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 1rem;
  min-width: 150px;
  flex-shrink: 0;
  cursor: pointer;
  transition: all 0.2s;
}
.stage-box:hover { border-color: var(--text2); }
.stage-box.active { border-color: var(--accent); background: rgba(88, 166, 255, 0.06); }
.stage-box.visited { border-color: var(--border); background: rgba(88, 166, 255, 0.02); }
.stage-box.visited .stage-num { color: var(--accent); }

.stage-num {
  font-size: 0.65rem;
  color: var(--text2);
  margin-bottom: 0.15rem;
  font-weight: 600;
}

.stage-box h4 { font-size: 0.85rem; margin-bottom: 0.1rem; }
.stage-box .stage-crate { font-size: 0.7rem; color: var(--text2); }

.stage-arrow {
  display: flex;
  align-items: center;
  color: var(--text2);
  font-size: 1.1rem;
  padding: 0 0.25rem;
  flex-shrink: 0;
  user-select: none;
}

.stage-detail {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-top: 0.6rem;
  min-height: 80px;
}
.stage-detail h3 { font-size: 0.9rem; margin-bottom: 0.25rem; }
.stage-detail p { font-size: 0.82rem; color: var(--text2); line-height: 1.6; }
.stage-detail .action-list {
  margin-top: 0.5rem;
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.action-tag {
  font-size: 0.68rem;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  border: 1px solid var(--border);
  background: var(--surface2);
}
.action-continue { color: var(--green); border-color: var(--green); }
.action-send { color: var(--accent); border-color: var(--accent); }
.action-satisfy { color: var(--yellow); border-color: var(--yellow); }
.action-drop { color: var(--red); border-color: var(--red); }
.action-nack { color: var(--orange); border-color: var(--orange); }

/* ── Packet Explorer ──────────────────────────────────────────────────────── */

/* Tabs */
.pex-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.1rem;
}
.pex-tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text2);
  padding: 0.45rem 1rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: color 0.15s, border-color 0.15s;
  margin-bottom: -1px;
}
.pex-tab-btn:hover { color: var(--text); }
.pex-tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Encoder layout */
.pex-enc-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  align-items: start;
}
@media (max-width: 700px) { .pex-enc-layout { grid-template-columns: 1fr; } }

.pex-byte-count {
  font-size: 0.72rem;
  color: var(--text2);
  font-weight: 400;
  margin-left: 0.5rem;
  font-family: 'SFMono-Regular', Consolas, monospace;
}

/* Encoder hex output */
.pex-enc-output { min-height: 80px; }

.pex-hex-block {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.9;
  word-break: break-all;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.7rem;
  margin-bottom: 0.5rem;
  max-height: 300px;
  overflow-y: auto;
}

/* Colorized hex spans by TLV category (encoder output) */
.hxb-cat-interest { color: var(--accent); }
.hxb-cat-data     { color: var(--green); }
.hxb-cat-name     { color: var(--cyan); }
.hxb-cat-meta     { color: var(--yellow); }
.hxb-cat-content  { color: var(--green); }
.hxb-cat-sig      { color: var(--purple); }
.hxb-cat-nonce    { color: var(--orange); }
.hxb-cat-lifetime { color: var(--yellow); }
.hxb-cat-flag     { color: var(--text2); }
.hxb-cat-lp       { color: var(--orange); }
.hxb-cat-unknown  { color: var(--text); }

.pex-enc-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  margin-top: 0.35rem;
}

/* Inspector */
.pex-ins-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.pex-hex-input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.78rem;
  padding: 0.5rem 0.7rem;
  border-radius: 6px;
  resize: vertical;
  height: 72px;
  outline: none;
  transition: border-color 0.15s;
  margin-bottom: 0.75rem;
}
.pex-hex-input:focus { border-color: var(--accent); }

.pex-panes-wrap { min-height: 60px; }

.pex-panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
@media (max-width: 700px) { .pex-panes { grid-template-columns: 1fr; } }

.pex-pane {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.pex-pane-title {
  font-size: 0.72rem;
  color: var(--text2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.4rem 0.7rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.pex-empty-state {
  color: var(--text2);
  font-size: 0.82rem;
  padding: 1.5rem;
  text-align: center;
}

/* Hex dump */
.hx-dump {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.76rem;
  line-height: 1.65;
  padding: 0.5rem 0.6rem;
  max-height: 420px;
  overflow-y: auto;
}
.hx-row { display: flex; align-items: center; flex-wrap: nowrap; }
.hx-off {
  color: var(--text2);
  margin-right: 0.8rem;
  width: 4ch;
  flex-shrink: 0;
  user-select: none;
}
.hx-byte {
  cursor: default;
  padding: 0 0.15rem;
  border-radius: 2px;
  transition: background 0.05s;
  user-select: text;
}
.hx-byte.hl { background: rgba(88, 166, 255, 0.28); color: var(--text); }
.hx-sep  { width: 0.6rem; flex-shrink: 0; }
.hx-pad  { width: 2ch; padding: 0 0.15rem; }
.hx-truncated {
  color: var(--text2);
  font-size: 0.72rem;
  padding: 0.25rem 0;
  font-style: italic;
}

/* TLV tree */
.tlv-tree {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.76rem;
  padding: 0.4rem 0;
  max-height: 420px;
  overflow-y: auto;
}
.tlv-node.hl > .tlv-header { background: rgba(88, 166, 255, 0.1); border-radius: 3px; }
.tlv-header {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  padding: 0.1rem 0.6rem 0.1rem 0;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
}
.tlv-header:hover { background: var(--surface2); border-radius: 3px; }

.tlv-toggle {
  color: var(--text2);
  font-size: 0.6rem;
  width: 0.9rem;
  flex-shrink: 0;
  text-align: center;
  user-select: none;
}
.tlv-toggle-leaf { /* spacer for leaf nodes */ }

.tlv-type-hex  { color: var(--text2); font-size: 0.72rem; flex-shrink: 0; }
.tlv-type-name { font-weight: 600; flex-shrink: 0; }
.tlv-val-text  { color: var(--green); overflow: hidden; text-overflow: ellipsis; }
.tlv-val-hex   { color: var(--text2); overflow: hidden; text-overflow: ellipsis; }
.tlv-len       { color: var(--text2); font-size: 0.68rem; margin-left: auto; flex-shrink: 0; }

/* TLV type color coding */
.tlv-cat-interest .tlv-type-name { color: var(--accent); }
.tlv-cat-data     .tlv-type-name { color: var(--green); }
.tlv-cat-name     .tlv-type-name { color: var(--cyan); }
.tlv-cat-meta     .tlv-type-name { color: var(--yellow); }
.tlv-cat-content  .tlv-type-name { color: var(--green); }
.tlv-cat-sig      .tlv-type-name { color: var(--purple); }
.tlv-cat-nonce    .tlv-type-name { color: var(--orange); }
.tlv-cat-lifetime .tlv-type-name { color: var(--yellow); }
.tlv-cat-flag     .tlv-type-name { color: var(--text2); }
.tlv-cat-lp       .tlv-type-name { color: var(--orange); }

/* ── Search ───────────────────────────────────────────────────────────────── */

.search-count {
  font-size: 0.82rem;
  color: var(--text2);
  margin-bottom: 0.75rem;
}

.search-result {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.65rem 0.8rem;
  margin-bottom: 0.4rem;
  cursor: pointer;
  transition: border-color 0.15s;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}
.search-result:hover { border-color: var(--accent); }

.match-type {
  font-size: 0.62rem;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
  width: 40px;
}
.match-name {
  font-weight: 600;
  font-size: 0.88rem;
}
.match-in {
  font-size: 0.78rem;
  color: var(--text2);
  margin-left: auto;
  flex-shrink: 0;
}
.match-desc {
  font-size: 0.78rem;
  color: var(--text2);
  grid-column: 1 / -1;
}

/* ── Guided Tour ──────────────────────────────────────────────────────────── */

.tour-progress {
  font-size: 0.78rem;
  color: var(--text2);
  margin-bottom: 0.6rem;
}

.tour-progress-bar {
  width: 100%;
  height: 3px;
  background: var(--surface2);
  border-radius: 2px;
  margin-top: 0.35rem;
  overflow: hidden;
}
.tour-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s;
}

.tour-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
}
.tour-card h2 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}
.tour-card p {
  color: var(--text2);
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
  line-height: 1.65;
}

.tour-action {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.85rem;
  background: none;
  border: none;
  font: inherit;
  padding: 0;
}
.tour-action:hover { text-decoration: underline; }

.tour-nav {
  display: flex;
  gap: 0.5rem;
}

.tour-btn {
  padding: 0.45rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.82rem;
  border: none;
  transition: opacity 0.15s;
}
.tour-btn:hover { opacity: 0.85; }
.tour-btn-primary { background: var(--accent); color: #000; }
.tour-btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}

/* Tour layout with split panel */
.tour-header { padding: 0.75rem 1.5rem 0; }
.tour-body { padding: 0 1.5rem 1.5rem; }
.tour-body-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
.tour-text-col { display: flex; flex-direction: column; gap: 0.75rem; }
.tour-demo-col {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  min-height: 140px;
}

/* ── TLV mini-demo ─────────────────────────────────────────────────────────── */

.mini-tlv-wrap { display: flex; flex-direction: column; gap: 0.5rem; }
.mini-tlv-hex {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.9;
  background: var(--surface);
  padding: 0.5rem 0.6rem;
  border-radius: 5px;
  border: 1px solid var(--border);
}
.mini-tlv-byte {
  display: inline-block;
  cursor: default;
  padding: 0.05rem 0.15rem;
  border-radius: 2px;
  border-bottom: 2px solid transparent;
  transition: opacity 0.1s;
}
.mini-tlv-sp { display: inline-block; width: 0.4em; }
.mini-tlv-tooltip {
  font-size: 0.8rem;
  color: var(--text2);
  padding: 0.25rem 0;
  min-height: 1.4em;
  transition: color 0.15s;
}
.mini-tlv-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text2);
}
.mini-tlv-legend-item { display: flex; align-items: center; gap: 0.25rem; }
.mini-tlv-swatch { display: inline-block; width: 10px; height: 10px; border-radius: 2px; }

/* ── Pipeline mini-demo ───────────────────────────────────────────────────── */

.mini-pipe-wrap { display: flex; flex-direction: column; gap: 0.5rem; }
.mini-pipe-label {
  font-size: 0.78rem;
  color: var(--text2);
  font-family: 'SFMono-Regular', Consolas, monospace;
  min-height: 1.4em;
  transition: color 0.2s;
}
.mini-pipe-track {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}
.mini-pipe-stage {
  padding: 0.3rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 0.76rem;
  color: var(--text2);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.mini-pipe-stage.mini-pipe-active {
  background: var(--surface2);
  color: var(--text);
  animation: mini-pipe-pulse 0.5s ease-out;
}
.mini-pipe-stage.mini-pipe-done {
  color: var(--text2);
  opacity: 0.55;
}
@keyframes mini-pipe-pulse {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.07); }
  100% { transform: scale(1); }
}
.mini-pipe-arrow { font-size: 0.85rem; color: var(--border); }

/* ── Strategy mini-demo ───────────────────────────────────────────────────── */

.mini-strat-wrap { display: flex; flex-direction: column; gap: 0.5rem; }
.mini-strat-tabs { display: flex; gap: 0.25rem; margin-bottom: 0.25rem; }
.mini-strat-tab {
  padding: 0.2rem 0.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text2);
  font-size: 0.78rem;
  cursor: pointer;
}
.mini-strat-tab.active { background: var(--surface2); color: var(--text); border-color: var(--accent); }
.mini-strat-fib { display: flex; flex-direction: column; gap: 4px; }
.mini-fib-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  padding: 0.2rem 0.4rem;
  background: var(--surface);
  border-radius: 4px;
  flex-wrap: wrap;
}
.mini-fib-prefix { font-family: monospace; color: var(--accent); min-width: 80px; }
.mini-fib-arrow { color: var(--text2); }
.mini-fib-faces { display: flex; gap: 0.3rem; flex-wrap: wrap; }
.mini-fib-face {
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 0.74rem;
}
.mini-fib-face.chosen { border-color: #3fb95066; color: var(--green); }
.mini-fib-action { margin-left: auto; font-size: 0.72rem; color: var(--text2); font-style: italic; }
.mini-strat-note {
  font-size: 0.74rem;
  color: var(--text2);
  padding: 0.3rem 0;
  font-style: italic;
}

/* ── Topology mini-demo ──────────────────────────────────────────────────── */

.mini-topo-wrap { display: flex; flex-direction: column; align-items: center; gap: 0.35rem; }
.mini-topo-label {
  font-size: 0.76rem;
  color: var(--text2);
  font-family: monospace;
  text-align: center;
  min-height: 1.4em;
}

/* ── Security mini-demo ──────────────────────────────────────────────────── */

.mini-sec-wrap { display: flex; flex-direction: column; gap: 0.35rem; }
.mini-sec-step-label {
  font-size: 0.76rem;
  color: var(--text2);
  min-height: 1.4em;
}
.mini-sec-content { min-height: 48px; }
.mini-sec-fields { display: flex; flex-wrap: wrap; gap: 0.3rem; align-items: center; }
.mini-sec-field {
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.74rem;
  border: 1px solid transparent;
}
.mini-sec-field.s    { background: #1a3527; border-color: #3fb95044; color: var(--green); }
.mini-sec-field.x    { background: var(--surface2); color: var(--text2); font-style: italic; }
.mini-sec-field.done { background: #1a3527; border-color: var(--green); color: var(--green); }
.mini-sec-flow { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; }
.mini-sec-arr { color: var(--text2); font-size: 1rem; }
.mini-sec-box {
  padding: 0.2rem 0.6rem;
  border-radius: 5px;
  font-size: 0.76rem;
  font-weight: 600;
}
.mini-sec-box.hash { background: #21203a; border: 1px solid #d2a8ff; color: var(--purple); }
.mini-sec-bytes { font-family: monospace; font-size: 0.73rem; color: var(--cyan); }
.mini-sec-dots { display: flex; gap: 5px; justify-content: center; margin-top: 0.25rem; }
.mini-sec-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--border); transition: background 0.2s;
}
.mini-sec-dot.active { background: var(--accent); }

/* ── Topology view ─────────────────────────────────────────────────────────── */

.topo-root {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.topo-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.topo-scenario-select {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  font-size: 0.85rem;
  flex: 1;
  max-width: 420px;
}

.topo-btn {
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 0.85rem;
  cursor: pointer;
  background: var(--surface2);
  color: var(--text);
  white-space: nowrap;
  transition: background 0.15s;
}
.topo-btn:hover { background: var(--border); }
.topo-btn-send { background: var(--accent); color: #000; border-color: var(--accent); }
.topo-btn-send:hover { opacity: 0.85; }
.topo-btn:disabled { opacity: 0.4; cursor: default; }

.topo-speed-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--text2);
  margin-left: auto;
}
.topo-speed-select {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.4rem;
  font-size: 0.82rem;
}

.topo-desc-bar {
  padding: 0.4rem 1.25rem;
  font-size: 0.82rem;
  color: var(--text2);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.topo-main {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.topo-canvas-wrap {
  flex: 1;
  overflow: auto;
  padding: 1rem;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.topo-svg {
  background: var(--surface);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.topo-node circle { transition: fill 0.2s; }
.topo-node:hover circle { filter: brightness(1.2); }

.topo-link-line { transition: stroke 0.4s; }

.topo-stats-panel {
  width: 280px;
  flex-shrink: 0;
  overflow-y: auto;
  padding: 0.75rem;
  border-left: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.82rem;
}

.topo-stats-hint {
  color: var(--text2);
  font-size: 0.82rem;
  padding: 0.5rem 0;
}

.topo-stats-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topo-stats-prefix {
  font-size: 0.78rem;
  color: var(--text2);
  margin-bottom: 0.5rem;
  word-break: break-all;
}

.topo-node-badge {
  font-size: 0.68rem;
  padding: 0.1em 0.5em;
  border-radius: 10px;
  font-weight: 600;
  text-transform: uppercase;
}
.topo-node-badge-router   { background: #58a6ff22; color: var(--accent); border: 1px solid #58a6ff55; }
.topo-node-badge-consumer { background: #3fb95022; color: var(--green);  border: 1px solid #3fb95055; }
.topo-node-badge-producer { background: #f0883e22; color: var(--orange); border: 1px solid #f0883e55; }

.topo-stats-section {
  margin-top: 0.6rem;
}
.topo-stats-section h4 {
  font-size: 0.75rem;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}

.topo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}
.topo-table th {
  color: var(--text2);
  font-weight: 500;
  text-align: left;
  padding: 0.2rem 0.4rem;
  border-bottom: 1px solid var(--border);
}
.topo-table td {
  padding: 0.2rem 0.4rem;
  color: var(--text);
  word-break: break-all;
}
.topo-table tr:hover td { background: var(--surface2); }
.topo-empty { color: var(--text2); font-style: italic; }

/* ── Discovery walkthrough panel ────────────────────────────────────────────── */

.topo-disc-panel {
  padding: 0.25rem 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  height: 100%;
}

.topo-disc-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1.3;
}

.topo-disc-body {
  font-size: 0.82rem;
  color: var(--text2);
  line-height: 1.55;
  flex: 1;
}
.topo-disc-body strong { color: var(--text); }
.topo-disc-body em { color: var(--purple); font-style: normal; }
.topo-disc-body code {
  font-size: 0.78rem;
  background: var(--surface2);
  padding: 0.1em 0.35em;
  border-radius: 3px;
  color: var(--cyan);
}

.topo-disc-nav {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.topo-disc-prev,
.topo-disc-next,
.topo-disc-replay {
  flex: 1;
  min-width: 0;
  font-size: 0.78rem;
  padding: 0.3rem 0.4rem;
}

.topo-disc-stop {
  background: transparent;
  border-color: var(--red);
  color: var(--red);
  font-size: 0.78rem;
  padding: 0.3rem 0.5rem;
}
.topo-disc-stop:hover { background: rgba(207, 34, 46, 0.12); }

.topo-event-log {
  height: 110px;
  overflow-y: auto;
  padding: 0.4rem 1.25rem;
  background: var(--bg);
  border-top: 1px solid var(--border);
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.76rem;
  color: var(--text2);
  flex-shrink: 0;
}

.topo-log-line {
  padding: 0.1rem 0;
  white-space: pre;
}
.topo-log-line:first-child { color: var(--text); }

/* ── Security / Signing Animations ─────────────────────────────────────────── */

.sec-root {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.sec-topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.sec-mode-tabs {
  display: flex;
  gap: 0.25rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.sec-tab {
  padding: 0.3rem 0.85rem;
  background: var(--surface2);
  border: none;
  color: var(--text2);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.sec-tab:hover { background: var(--border); color: var(--text); }
.sec-tab-active { background: var(--accent) !important; color: #000 !important; }

.sec-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.sec-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text2);
}
.sec-input {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 5px;
  padding: 0.25rem 0.5rem;
  font-size: 0.82rem;
}
.sec-input-content { width: 140px; }
.sec-tamper-label { color: var(--red); }

.sec-main {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.sec-canvas-wrap {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1.5rem;
}

.sec-canvas {
  min-height: 200px;
}

.sec-desc-box {
  width: 280px;
  flex-shrink: 0;
  padding: 1rem;
  border-left: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.82rem;
  color: var(--text2);
  line-height: 1.6;
  overflow-y: auto;
}
.sec-desc-box strong {
  color: var(--text);
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.sec-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1.25rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.sec-step-indicator {
  display: flex;
  gap: 6px;
  align-items: center;
}
.sec-step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.2s;
  cursor: default;
}
.sec-step-dot.done    { background: var(--text2); }
.sec-step-dot.active  { background: var(--accent); transform: scale(1.3); }

.sec-btn-row {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
}
.sec-btn {
  padding: 0.3rem 0.8rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.15s;
}
.sec-btn:hover { background: var(--border); }
.sec-btn:disabled { opacity: 0.35; cursor: default; }
.sec-btn-primary { background: var(--accent); color: #000; border-color: var(--accent); }

/* ── Packet field tree ───────────────────────────────────────────────────────── */

.sec-packet-tree {
  display: flex;
  flex-direction: column;
  gap: 3px;
  max-width: 680px;
}

.sec-field {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.3rem 0.6rem;
  border-radius: 5px;
  font-size: 0.83rem;
  border: 1px solid transparent;
  transition: background 0.25s, border-color 0.25s;
}

.sec-field-appear {
  animation: sec-field-drop 0.2s ease-out both;
}
@keyframes sec-field-drop {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.sec-field-neutral  { background: var(--surface2); border-color: var(--border); }
.sec-field-signed   { background: #21262d; border-color: #3fb95044; }
.sec-field-signed-hi { background: #1a3527; border-color: var(--green); }
.sec-field-sigval   { background: var(--surface2); border-color: var(--border); }
.sec-field-extracted { background: #1a2a3e; border-color: var(--accent); }
.sec-field-dim      { background: transparent; opacity: 0.4; border-color: transparent; }

.sec-field-sigval-empty .sec-field-value { color: var(--text2); font-style: italic; }
.sec-field-sigval-filling { background: #1a3527; border-color: var(--green); animation: sec-fill-in 0.4s ease-out; }
.sec-field-value-filling { animation: sec-fill-in 0.4s ease-out; color: var(--green); }
@keyframes sec-fill-in {
  from { opacity: 0; background: #3fb95033; }
  to   { opacity: 1; background: transparent; }
}

.sec-field-type {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.76rem;
  color: var(--yellow);
  min-width: 3.5rem;
}
.sec-field-label {
  font-weight: 500;
  color: var(--text);
  min-width: 10rem;
}
.sec-field-value {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.76rem;
  color: var(--cyan);
  word-break: break-all;
}

.sec-byte-count {
  margin-top: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 0.82rem;
  color: var(--text2);
}

/* ── Flow diagram (hash / sign / verify steps) ──────────────────────────────── */

.sec-flow-diagram {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 1.25rem 0.5rem;
}

.sec-flow-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 100px;
}

.sec-flow-title {
  font-size: 0.76rem;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.sec-flow-field {
  padding: 0.2rem 0.5rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text);
  animation: sec-field-drop 0.15s ease-out both;
}

.sec-flow-arrow { font-size: 1.4rem; color: var(--text2); padding: 0 0.25rem; }
.sec-flow-arrow-down { font-size: 1.1rem; color: var(--text2); text-align: center; margin-top: 4px; }

.sec-flow-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  min-width: 110px;
  text-align: center;
  animation: sec-box-appear 0.3s ease-out;
}
@keyframes sec-box-appear {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

.sec-flow-hash { background: #21203a; border: 2px solid #d2a8ff; }
.sec-flow-key  { background: #1e2d20; border: 2px solid #3fb950; }
.sec-flow-verify-pass { background: #1a3527; border: 2px solid var(--green); }
.sec-flow-verify-fail { background: #2d1a1a; border: 2px solid var(--red); }

.sec-flow-box-icon { font-size: 1.8rem; line-height: 1; }
.sec-flow-box-label { font-weight: 600; font-size: 0.88rem; margin-top: 0.25rem; }
.sec-flow-box-sub { font-size: 0.73rem; color: var(--text2); margin-top: 0.15rem; }

.sec-flow-verify-pass .sec-flow-box-label { color: var(--green); }
.sec-flow-verify-fail .sec-flow-box-label { color: var(--red); }

.sec-flow-bytes {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.73rem;
  color: var(--cyan);
  background: var(--surface2);
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  line-height: 1.6;
  word-break: break-all;
}
.sec-flow-bytes-sig { color: var(--green); border: 1px solid #3fb95044; animation: sec-fill-in 0.4s ease-out; }

.sec-flow-note {
  font-size: 0.76rem;
  color: var(--yellow);
  margin-top: 0.35rem;
  font-style: italic;
}

/* ── Verify-specific ────────────────────────────────────────────────────────── */

.sec-verify-note {
  font-size: 0.78rem;
  color: var(--text2);
  padding: 0.4rem 0.6rem;
  font-style: italic;
}

.sec-verify-compare {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: 560px;
}

.sec-compare-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
}
.sec-compare-label {
  min-width: 140px;
  color: var(--text2);
}
.sec-compare-row code {
  font-size: 0.76rem;
  color: var(--cyan);
  background: var(--surface2);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.sec-verify-result {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.87rem;
  max-width: 560px;
}
.sec-result-pass { background: #1a3527; border: 1px solid var(--green); color: var(--green); }
.sec-result-fail { background: #2d1a1a; border: 1px solid var(--red);   color: var(--red); }

/* ── Cert chain ─────────────────────────────────────────────────────────────── */

.sec-cert-chain {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: 0.5rem 0;
  max-width: 560px;
  margin: 0 auto;
}

.sec-cert-level { width: 100%; }

.sec-cert-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.82rem;
  animation: sec-field-drop 0.2s ease-out;
}
.sec-cert-card-data { border-color: var(--accent); background: #1a2a3e; }

.sec-cert-card-header {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text);
  margin-bottom: 0.4rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
}

.sec-cert-field {
  display: flex;
  gap: 0.5rem;
  padding: 0.1rem 0;
  font-size: 0.8rem;
  color: var(--text2);
  word-break: break-all;
}
.sec-ct {
  font-size: 0.73rem;
  color: var(--yellow);
  min-width: 80px;
  font-family: 'SFMono-Regular', Consolas, monospace;
}

.sec-cert-badge {
  margin-top: 0.4rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
}
.sec-cert-anchor { background: #2d2a1a; color: var(--yellow); }
.sec-cert-ksk    { background: #1e2d20; color: var(--green);  }
.sec-cert-dsk    { background: #1a2a3e; color: var(--accent); }

.sec-cert-arrow {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text2);
  padding: 0.35rem 0;
  letter-spacing: 0.1em;
}

.sec-cert-note {
  margin-top: 0.75rem;
  font-size: 0.78rem;
  color: var(--text2);
  text-align: center;
  font-style: italic;
  padding: 0 1rem;
}

/* ── Multi-Packet Swimlane ─────────────────────────────────────────────────── */

.swimlane-section {
  margin-top: 1.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.swimlane-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.swimlane-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  flex-shrink: 0;
}

.swimlane-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-left: auto;
}

.swimlane-hint {
  padding: 0.4rem 1rem;
  font-size: 0.78rem;
  color: var(--text2);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.swimlane-empty {
  padding: 1.25rem 1rem;
  text-align: center;
  color: var(--text2);
  font-size: 0.85rem;
  font-style: italic;
}

.swimlane-grid-inner {
  width: 100%;
  overflow-x: auto;
}

/* Each row is a flex row: label cell + 4 stage cells */
.swim-row {
  display: grid;
  grid-template-columns: 220px repeat(4, 1fr);
  border-bottom: 1px solid var(--border);
  min-width: 600px;
}
.swim-row:last-child { border-bottom: none; }

.swim-header-row {
  background: var(--surface);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.swim-header-cell {
  padding: 0.45rem 0.75rem;
  border-right: 1px solid var(--border);
}
.swim-header-cell:last-child { border-right: none; }

.swim-label-cell {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.75rem;
  border-right: 1px solid var(--border);
  min-width: 0;
  overflow: hidden;
  background: var(--surface);
}

.swim-color-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}

.swim-pkt-badge {
  flex-shrink: 0;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.05em 0.35em;
  border-radius: 3px;
}

.swim-pkt-name {
  font-size: 0.78rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  font-family: 'SFMono-Regular', Consolas, monospace;
}

.swim-row-num {
  font-size: 0.7rem;
  color: var(--text2);
  flex-shrink: 0;
  margin-left: auto;
}

.swim-stage-cell {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  padding: 0.45rem 0.75rem;
  border-right: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.12s;
  min-width: 0;
}
.swim-stage-cell:last-child { border-right: none; }
.swim-stage-cell:hover { background: var(--surface2); }

.swim-stage-cell.swim-skipped {
  opacity: 0.4;
  cursor: default;
}
.swim-stage-cell.swim-skipped:hover { background: transparent; }

.swim-stage-cell.swim-terminal {
  border-left: 2px solid var(--swim-color, var(--accent));
}

.swim-stage-name {
  font-size: 0.7rem;
  color: var(--text2);
  font-family: 'SFMono-Regular', Consolas, monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}

.swim-skipped-dash {
  font-size: 0.82rem;
  color: var(--text2);
}

/* "Add to Timeline" button variant */
.pipe-swim-btn {
  background: var(--surface2);
  color: var(--accent);
  border-color: var(--accent);
}
.pipe-swim-btn:hover {
  background: rgba(88, 166, 255, 0.12);
}