/* AdaKit — dark industrial hardware-tool aesthetic */
:root {
  --bg: #0b0d10;
  --bg-elev: #12151a;
  --bg-card: #161a21;
  --bg-hover: #1c222c;
  --border: #2a3140;
  --border-strong: #3d4659;
  --text: #e8ecf1;
  --text-muted: #8b95a8;
  --text-dim: #5c6578;
  --accent: #3d9cf0;
  --accent-dim: #2563a8;
  --accent-glow: rgba(61, 156, 240, 0.25);
  --success: #2dd4a8;
  --success-dim: #1a8f72;
  --warn: #f0b429;
  --danger: #f07178;
  --orange: #e8954a;
  --font: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "SF Mono", "Consolas", monospace;
  --radius: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.45);
  --max: 1100px;
}

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

html { font-size: 15px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

.mono { font-family: var(--mono); }
.muted { color: var(--text-muted); }
.dim { color: var(--text-dim); }
.success-text { color: var(--success); }
.warn-text { color: var(--warn); }
.danger-text { color: var(--danger); }

/* ── Top nav ── */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1.25rem;
  background: rgba(11, 13, 16, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  cursor: pointer;
  user-select: none;
}

.logo-mark {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent), #1a5a9e);
  border-radius: 4px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 0 12px var(--accent-glow);
}

.logo-text span { color: var(--text-muted); font-weight: 400; font-size: 0.8rem; margin-left: 0.35rem; }

.nav-steps {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--mono);
}

.nav-steps .step {
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  transition: color 0.15s, background 0.15s;
}

.nav-steps .step.active {
  color: var(--accent);
  background: rgba(61, 156, 240, 0.12);
}

.nav-steps .step.done { color: var(--success); }
.nav-steps .sep { color: var(--border-strong); }

.nav-badge {
  font-size: 0.7rem;
  font-family: var(--mono);
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
}

/* ── Screens ── */
.screen { display: none; padding: 1.5rem 1.25rem 3rem; max-width: var(--max); margin: 0 auto; }
.screen.active { display: block; }
.screen.wide { max-width: 1280px; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.15rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text);
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s, transform 0.1s;
  white-space: nowrap;
}

.btn:hover { background: var(--bg-hover); border-color: var(--text-dim); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #061018;
  font-weight: 600;
}
.btn-primary:hover { background: #5aaff5; border-color: #5aaff5; box-shadow: 0 0 20px var(--accent-glow); }

.btn-success {
  background: var(--success);
  border-color: var(--success);
  color: #041510;
  font-weight: 600;
}
.btn-success:hover { background: #4de0bc; }

.btn-ghost { background: transparent; }
.btn-lg { padding: 0.9rem 1.5rem; font-size: 1.05rem; }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.8rem; }
.btn-block { width: 100%; }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.card-hover { cursor: pointer; transition: border-color 0.15s, background 0.15s; }
.card-hover:hover { border-color: var(--accent); background: var(--bg-hover); }
.card-selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }

/* ── Landing ── */
.hero {
  text-align: center;
  padding: 3rem 0 2.5rem;
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.85rem;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--success));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 2rem;
}

.funnel-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem;
  margin-bottom: 2.5rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
}

.funnel-strip span {
  padding: 0.3rem 0.55rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 3px;
}

.funnel-strip .arrow { border: none; background: none; padding: 0.3rem 0.15rem; color: var(--border-strong); }

.disclaimer {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--warn);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  text-align: left;
}
.disclaimer strong { color: var(--warn); }

.seed-section h2 {
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
  text-align: center;
}
.seed-section > p { text-align: center; color: var(--text-muted); margin-bottom: 1.25rem; font-size: 0.9rem; }

.seed-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.seed-card h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.seed-card .seed-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.75rem 0;
}
.seed-actions {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 0.5rem;
  margin-top: 0.25rem;
}
@media (max-width: 420px) {
  .seed-actions { grid-template-columns: 1fr; }
}
.chip {
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 0.2rem 0.45rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-muted);
}
.chip.accent { border-color: var(--accent-dim); color: var(--accent); }

.custom-brief {
  margin-top: 1rem;
}
.custom-brief summary {
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 0.5rem 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.custom-brief summary::before { content: "+"; font-family: var(--mono); color: var(--accent); }
.custom-brief[open] summary::before { content: "−"; }
.custom-brief .form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
  padding: 1rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--mono);
}

input, select, textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.55rem 0.7rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
textarea { resize: vertical; min-height: 70px; }

/* ── Architecture ── */
.arch-header { margin-bottom: 1.5rem; }
.arch-header h2 { font-size: 1.35rem; letter-spacing: -0.02em; margin-bottom: 0.35rem; }
.brief-summary {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--mono);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.arch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.arch-card h3 { font-size: 1.05rem; margin-bottom: 0.25rem; }
.arch-card .arch-tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.arch-card .arch-stack {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.arch-card .arch-stack div { padding: 0.2rem 0; }
.arch-card .arch-stack strong { color: var(--text); font-weight: 500; }
.arch-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.arch-stat .label { font-size: 0.65rem; font-family: var(--mono); color: var(--text-dim); }
.arch-stat .value { font-family: var(--mono); font-size: 0.95rem; font-weight: 600; }

/* ── Architecture mindmap ── */
.arch-mindmap-wrap {
  position: relative;
  margin: 0 0 1.25rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.arch-mindmap-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 0.55rem 0.85rem 0;
}
.arch-mindmap-scroll {
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x pan-y;
  max-height: min(420px, 55vh);
}
.arch-mindmap {
  min-width: 720px;
  transform-origin: 0 0;
}
.arch-mindmap svg {
  display: block;
  width: 100%;
  height: auto;
  user-select: none;
}
.arch-mindmap-tools {
  position: absolute;
  right: 0.55rem;
  bottom: 0.55rem;
  display: flex;
  gap: 0.3rem;
  z-index: 2;
}
.arch-mindmap-tools .btn {
  min-width: 2rem;
  padding: 0.2rem 0.45rem;
  font-family: var(--mono);
  background: var(--bg-card);
  opacity: 0.92;
}
.mm-link {
  fill: none;
  stroke: #3a4558;
  stroke-width: 1.4;
  stroke-linecap: round;
}
.mm-link-child { stroke: #2e3646; stroke-width: 1.1; }
.mm-node-center rect {
  fill: #1a2230;
  stroke: var(--accent);
  stroke-width: 1.6;
}
.mm-node-center text { fill: #e8ecf1; font-weight: 600; }
.mm-node-arch {
  cursor: pointer;
}
.mm-node-arch rect {
  fill: #161a21;
  stroke: #3d4659;
  stroke-width: 1.3;
  transition: stroke 0.15s, fill 0.15s, filter 0.15s;
}
.mm-node-arch text { fill: #c9d1dc; pointer-events: none; }
.mm-node-arch:hover rect,
.mm-group.mm-active .mm-node-arch rect {
  fill: #1c2838;
  stroke: var(--accent);
  filter: drop-shadow(0 0 6px var(--accent-glow));
}
.mm-node-child rect {
  fill: #12151a;
  stroke: #2a3140;
  stroke-width: 1;
}
.mm-node-child text { fill: #8b95a8; pointer-events: none; }
.mm-group.mm-active .mm-link { stroke: var(--accent-dim); }
.mm-group.mm-active .mm-link-child { stroke: #3d6a9a; }
.mm-group.mm-active .mm-node-child rect {
  stroke: #3d6a9a;
  fill: #182030;
}
.arch-card.mm-card-hl {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow);
  background: var(--bg-hover);
}
@media (max-width: 720px) {
  .arch-mindmap-scroll { max-height: 340px; }
  .arch-mindmap { min-width: 640px; }
}

/* ── Design surface ── */
.design-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1rem;
  align-items: start;
}

@media (max-width: 900px) {
  .design-layout { grid-template-columns: 1fr; }
  .nav-steps { display: none; }
}

.canvas-panel { min-width: 0; }

.canvas-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.view-tabs {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.view-tabs button {
  background: var(--bg-elev);
  border: none;
  border-right: 1px solid var(--border);
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  font-family: var(--mono);
  color: var(--text-muted);
  cursor: pointer;
}
.view-tabs button:last-child { border-right: none; }
.view-tabs button.active {
  background: var(--accent);
  color: #061018;
  font-weight: 600;
}

.regen-banner {
  display: none;
  background: rgba(240, 180, 41, 0.12);
  border: 1px solid rgba(240, 180, 41, 0.35);
  border-radius: var(--radius);
  padding: 0.55rem 0.85rem;
  font-size: 0.8rem;
  color: var(--warn);
  margin-bottom: 0.75rem;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.regen-banner.show { display: flex; }

#viewport {
  width: 100%;
  height: 420px;
  background: #080a0d;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}
#viewport canvas { display: block; width: 100% !important; height: 100% !important; }
#svg-overlay {
  display: none;
  width: 100%;
  height: 420px;
  background: #080a0d;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
}
#svg-overlay.active { display: block; }
#viewport.hidden { display: none; }

.side-panel { display: flex; flex-direction: column; gap: 0.75rem; }

.panel-section h4 {
  font-size: 0.7rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 0.6rem;
}

.parts-list {
  max-height: 200px;
  overflow-y: auto;
  font-size: 0.75rem;
  font-family: var(--mono);
}
.part-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.25rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border);
}
.part-row:last-child { border-bottom: none; }
.part-sku { color: var(--accent); }
.part-val { color: var(--text-muted); }

.drc-list { font-size: 0.8rem; }
.drc-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
}
.drc-item:last-child { border-bottom: none; }
.drc-icon {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  width: 1.2rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}
.drc-item.pass .drc-icon { color: var(--success); }
.drc-item.fail .drc-icon { color: var(--danger); }
.drc-item.warn .drc-icon { color: var(--warn); }

.drc-actions { display: flex; gap: 0.5rem; margin-top: 0.75rem; flex-wrap: wrap; }

.control-row {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}
.control-row select { width: 100%; }

/* ── Manufacturing / Quote ── */
.quote-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
@media (max-width: 700px) { .quote-grid { grid-template-columns: 1fr; } }

.quote-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  font-family: var(--mono);
  margin-top: 0.75rem;
}
.quote-table th, .quote-table td {
  padding: 0.5rem 0.6rem;
  text-align: right;
  border-bottom: 1px solid var(--border);
}
.quote-table th:first-child, .quote-table td:first-child { text-align: left; }
.quote-table th { color: var(--text-dim); font-weight: 500; font-size: 0.7rem; text-transform: uppercase; }
.quote-table tr.highlight td { color: var(--accent); font-weight: 600; }

.mfg-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* ── Checkout / Tracking ── */
.confirm-box {
  max-width: 520px;
  margin: 2rem auto;
  text-align: center;
}
.confirm-box .check {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.25rem;
  border-radius: 50%;
  background: rgba(45, 212, 168, 0.15);
  border: 2px solid var(--success);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  color: var(--success);
}
.confirm-meta {
  text-align: left;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1.25rem 0;
  font-family: var(--mono);
  font-size: 0.8rem;
}
.confirm-meta .row {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border);
}
.confirm-meta .row:last-child { border-bottom: none; }
.confirm-meta .k { color: var(--text-dim); }

.tracking-timeline {
  text-align: left;
  margin: 1.5rem 0;
}
.track-step {
  display: flex;
  gap: 0.85rem;
  padding-bottom: 1.25rem;
  position: relative;
}
.track-step::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 18px;
  bottom: 0;
  width: 2px;
  background: var(--border);
}
.track-step:last-child::before { display: none; }
.track-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--border-strong);
  flex-shrink: 0;
  margin-top: 2px;
  z-index: 1;
}
.track-step.done .track-dot { background: var(--success); border-color: var(--success); }
.track-step.active .track-dot {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}
.track-label { font-size: 0.9rem; }
.track-label .when { font-family: var(--mono); font-size: 0.7rem; color: var(--text-dim); }


/* ── Deep dive ── */
.deepdive-header { margin-bottom: 1rem; }
.deepdive-eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.deepdive-anim {
  position: relative;
  height: 220px;
  margin-bottom: 1.25rem;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(61,156,240,0.12), transparent 55%),
    radial-gradient(ellipse at 70% 60%, rgba(45,212,168,0.08), transparent 50%),
    #080a0d;
  display: flex;
  align-items: center;
  justify-content: center;
}
.deepdive-anim svg { width: min(100%, 520px); height: 200px; }

.deepdive-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.65rem;
}
.dd-tab {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.45rem 0.85rem;
  font-size: 0.8rem;
  font-family: var(--mono);
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.dd-tab:hover { border-color: var(--text-dim); color: var(--text); }
.dd-tab.active {
  background: rgba(61,156,240,0.14);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.dd-panel { display: none; }
.dd-panel.active { display: block; }

.dd-overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.85rem;
  margin-bottom: 0.5rem;
}
.dd-block h4 {
  font-size: 0.7rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 0.45rem;
}
.dd-block p, .dd-block li {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}
.dd-block ul { list-style: none; }
.dd-block ul li {
  padding: 0.28rem 0 0.28rem 1rem;
  position: relative;
  border-bottom: 1px solid var(--border);
}
.dd-block ul li:last-child { border-bottom: none; }
.dd-block ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.7rem;
}

.parts-map { display: flex; flex-direction: column; gap: 0.85rem; }
.parts-cat {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
}
.parts-cat h4 {
  font-size: 0.8rem;
  margin-bottom: 0.55rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.parts-cat h4 .cat-count {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  font-weight: 400;
}
.part-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 0.75rem;
  align-items: start;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}
.part-item:last-child { border-bottom: none; }
.part-item .pname { color: var(--text); font-weight: 500; }
.part-item .pdesc { color: var(--text-muted); font-size: 0.78rem; grid-column: 1 / -1; }
.badge-loc {
  font-family: var(--mono);
  font-size: 0.62rem;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  border: 1px solid var(--border);
  white-space: nowrap;
}
.badge-loc.on-pcb {
  color: var(--success);
  border-color: rgba(45,212,168,0.4);
  background: rgba(45,212,168,0.08);
}
.badge-loc.off-board {
  color: var(--orange);
  border-color: rgba(232,149,74,0.4);
  background: rgba(232,149,74,0.08);
}

.pcb-types {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
}
.pcb-type-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.95rem 1rem;
}
.pcb-type-card h4 { font-size: 0.95rem; margin-bottom: 0.35rem; }
.pcb-type-card p { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 0.65rem; }
.pcb-scope {
  font-family: var(--mono);
  font-size: 0.65rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.45rem;
  border-radius: 3px;
  border: 1px solid var(--border);
}
.pcb-scope.in-scope {
  color: var(--accent);
  border-color: rgba(61,156,240,0.45);
  background: rgba(61,156,240,0.1);
}
.pcb-scope.out-scope {
  color: var(--text-dim);
  border-color: var(--border-strong);
}

.deepdive-cta {
  margin-top: 1.75rem;
  text-align: center;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

/* Animations — mobile base */
@keyframes spin-wheel { to { transform: rotate(360deg); } }
@keyframes pulse-imu {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}
@keyframes imu-x {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(12deg); }
}
@keyframes imu-y {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(-10deg); }
}
@keyframes imu-z {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes chassis-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
@keyframes servo-sweep {
  0% { transform: rotate(-55deg); }
  50% { transform: rotate(55deg); }
  100% { transform: rotate(-55deg); }
}
@keyframes grip-open {
  0%, 100% { transform: rotate(18deg); }
  50% { transform: rotate(-8deg); }
}
@keyframes grip-open-m {
  0%, 100% { transform: rotate(-18deg); }
  50% { transform: rotate(8deg); }
}
@keyframes pwm-pulse {
  0%, 100% { stroke-dashoffset: 0; opacity: 0.5; }
  50% { stroke-dashoffset: -20; opacity: 1; }
}

.anim-base .wheel { transform-origin: center; animation: spin-wheel 2.4s linear infinite; }
.anim-base .wheel.rev { animation-direction: reverse; animation-duration: 2.8s; }
.anim-base .chassis { transform-origin: center; animation: chassis-bob 2.2s ease-in-out infinite; }
.anim-base .imu-frame { transform-origin: 260px 70px; }
.anim-base .axis-x { transform-origin: 260px 70px; animation: imu-x 2.6s ease-in-out infinite; }
.anim-base .axis-y { transform-origin: 260px 70px; animation: imu-y 3.1s ease-in-out infinite; }
.anim-base .axis-z { transform-origin: 260px 70px; animation: imu-z 4s linear infinite; }
.anim-base .imu-glow { animation: pulse-imu 1.8s ease-in-out infinite; }

.anim-servo .arm {
  transform-origin: 180px 130px;
  animation: servo-sweep 3.2s ease-in-out infinite;
}
.anim-servo .jaw-l {
  transform-origin: 300px 78px;
  animation: grip-open 3.2s ease-in-out infinite;
}
.anim-servo .jaw-r {
  transform-origin: 300px 78px;
  animation: grip-open-m 3.2s ease-in-out infinite;
}
.anim-servo .pwm-wave {
  stroke-dasharray: 6 4;
  animation: pwm-pulse 1.2s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .anim-base .wheel,
  .anim-base .chassis,
  .anim-base .axis-x,
  .anim-base .axis-y,
  .anim-base .axis-z,
  .anim-base .imu-glow,
  .anim-servo .arm,
  .anim-servo .jaw-l,
  .anim-servo .jaw-r,
  .anim-servo .pwm-wave { animation: none !important; }
}

/* ── Misc ── */
.section-title {
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}
.section-sub { color: var(--text-muted); margin-bottom: 1.25rem; font-size: 0.9rem; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}
.back-link:hover { color: var(--accent); }

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 0.75rem 1.1rem;
  font-size: 0.85rem;
  box-shadow: var(--shadow);
  z-index: 200;
  transform: translateY(120%);
  opacity: 0;
  transition: transform 0.25s, opacity 0.25s;
  max-width: 320px;
}
.toast.show { transform: translateY(0); opacity: 1; }

.footer-note {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.75rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(8,10,13,0.7);
  display: none;
  place-items: center;
  z-index: 5;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
}
.loading-overlay.show { display: grid; }

/* ── Problem wizard (v2) ── */
.wizard-card {
  max-width: 720px;
  margin: 0 auto 2.5rem;
}
.wizard-title {
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}
.wizard-lead { font-size: 0.9rem; margin-bottom: 1.1rem; }
.wizard-label {
  display: block;
  font-size: 0.8rem;
  font-family: var(--mono);
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.problem-textarea {
  width: 100%;
  min-height: 110px;
  padding: 0.85rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  resize: vertical;
  line-height: 1.45;
  margin-bottom: 1rem;
}
.problem-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.chip-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}
.chip-row-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: 0.25rem;
  min-width: 5.5rem;
}
.chip-toggle {
  font-size: 0.78rem;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.chip-toggle:hover { border-color: var(--border-strong); color: var(--text); }
.chip-toggle.active {
  border-color: var(--accent);
  background: rgba(61, 156, 240, 0.15);
  color: var(--accent);
}
.wizard-actions {
  margin-top: 1.25rem;
  display: flex;
  justify-content: flex-end;
}
.wizard-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

/* Market parts mining */
.parts-mine-meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin: 0.75rem 0 1rem;
}
.parts-categories { display: flex; flex-direction: column; gap: 1rem; }
.parts-cat-card h3 {
  font-size: 0.95rem;
  margin-bottom: 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.parts-cat-card h3 .cat-count {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  font-weight: 400;
}
.parts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}
.parts-table th {
  text-align: left;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--border);
}
.parts-table td {
  padding: 0.55rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.parts-table tr:last-child td { border-bottom: none; }
.parts-table .part-name { font-weight: 500; color: var(--text); }
.parts-table .part-vendor { color: var(--text-muted); font-family: var(--mono); font-size: 0.75rem; }
.parts-table .part-price { font-family: var(--mono); color: var(--success); white-space: nowrap; }
.stock-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-family: var(--mono);
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
  border: 1px solid var(--border);
}
.stock-badge.in-stock {
  color: var(--success);
  border-color: rgba(45, 212, 168, 0.4);
  background: rgba(45, 212, 168, 0.1);
}
.stock-badge.cots {
  color: var(--accent);
  border-color: rgba(61, 156, 240, 0.4);
  background: rgba(61, 156, 240, 0.1);
}
.stock-badge.special {
  color: var(--warn);
  border-color: rgba(240, 180, 41, 0.4);
  background: rgba(240, 180, 41, 0.08);
}

/* GitHub section */
.github-section { margin-top: 1.5rem; }
.gh-title { font-size: 1rem; margin-bottom: 0.35rem; }
.gh-list { display: grid; gap: 0.65rem; }
.gh-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.gh-item:hover { border-color: var(--border-strong); }
.gh-name {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}
.gh-purpose { font-size: 0.8rem; color: var(--text-muted); margin-top: 0.2rem; }
.gh-meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  white-space: nowrap;
  text-align: right;
}

/* Assembly manual */
.manual-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}
.manual-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.manual-doc {
  font-size: 0.9rem;
  line-height: 1.55;
  max-width: 820px;
}
.manual-doc h1 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}
.manual-doc h2 {
  font-size: 1.05rem;
  margin: 1.35rem 0 0.55rem;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}
.manual-doc h3 {
  font-size: 0.95rem;
  margin: 1rem 0 0.4rem;
}
.manual-doc ol, .manual-doc ul {
  margin: 0.4rem 0 0.6rem 1.25rem;
}
.manual-doc li { margin-bottom: 0.35rem; }
.manual-doc .manual-meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 1rem;
}
.manual-doc .warn-box {
  border-left: 3px solid var(--warn);
  background: rgba(240, 180, 41, 0.08);
  padding: 0.65rem 0.85rem;
  margin: 0.85rem 0;
  font-size: 0.85rem;
}

/* AR assembly guide */
.ar-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 1.25rem;
  align-items: start;
}
@media (max-width: 900px) {
  .ar-layout { grid-template-columns: 1fr; }
}
.ar-viewport {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #050608;
  padding: 0;
  min-height: 320px;
}
.ar-badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 5;
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.55rem;
  border-radius: 3px;
  background: rgba(240, 180, 41, 0.92);
  color: #1a1200;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.ar-badge.live {
  background: rgba(45, 212, 168, 0.92);
  color: #041510;
}
.ar-camera-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 40% 60%, rgba(61,156,240,0.08), transparent 55%),
    linear-gradient(160deg, #12151a 0%, #0b0d10 40%, #161a21 100%);
  background-size: 100% 100%, 200% 200%;
  animation: ar-cam-drift 12s ease-in-out infinite alternate;
}
@keyframes ar-cam-drift {
  from { background-position: 0 0, 0% 0%; }
  to { background-position: 0 0, 100% 40%; }
}
#ar-video, #ar-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
#ar-canvas { z-index: 2; pointer-events: none; }
.ar-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ar-ghost {
  width: min(78%, 420px);
  opacity: 0.92;
  filter: drop-shadow(0 0 18px rgba(61, 156, 240, 0.35));
}
.ar-step-callout {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  background: rgba(11, 13, 16, 0.88);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.5rem 0.85rem;
  font-size: 0.8rem;
  font-family: var(--mono);
  color: var(--accent);
  max-width: 90%;
  text-align: center;
}
.ar-step-controls {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}
.ar-step-controls .btn { flex: 1; }
.ar-highlight-pulse {
  animation: ar-pulse 1.6s ease-in-out infinite;
}
@keyframes ar-pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .ar-camera-bg, .ar-highlight-pulse { animation: none !important; }
}



/* ── Innovate these (compact idea chips) ── */
.innovate-section {
  margin: 0 0 1.75rem;
  padding: 1rem 1.1rem 1.15rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: left;
}
.innovate-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.85rem;
  margin-bottom: 0.75rem;
}
.innovate-eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.innovate-hint {
  font-size: 0.78rem;
}
.innovate-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.innovate-chip {
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s, box-shadow 0.15s;
}
.innovate-chip:hover {
  border-color: var(--accent);
  background: rgba(61, 156, 240, 0.12);
  color: var(--accent);
  box-shadow: 0 0 0 1px rgba(61, 156, 240, 0.25);
}
.innovate-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.innovate-header .btn-refresh-ideas,
.btn-refresh-ideas {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.btn-refresh-ideas:hover {
  border-color: var(--accent);
  background: rgba(61, 156, 240, 0.12);
}
.btn-refresh-ideas:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.innovate-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.innovate-chip-thumb {
  width: 22px;
  height: 22px;
  border-radius: 999px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border);
  background: var(--bg-card);
}

/* ── Requirement comprehension (v2.2) · concept drawing ── */
.worked-example-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0.65rem 0.75rem;
  background: rgba(61, 156, 240, 0.06);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}
.chip-example {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  font-weight: 600;
}
.chip-example:hover, .chip-example.active {
  background: rgba(61, 156, 240, 0.2) !important;
}
.seed-featured {
  border-color: rgba(61, 156, 240, 0.45);
  box-shadow: 0 0 0 1px rgba(61, 156, 240, 0.2), var(--shadow);
  grid-column: 1 / -1;
}
@media (min-width: 720px) {
  .seed-grid { grid-template-columns: 1fr 1fr; }
  .seed-featured { grid-column: 1 / -1; }
}
.parts-heading {
  font-size: 1rem;
  margin: 1.75rem 0 0.35rem;
  letter-spacing: -0.01em;
}

/* ── Concept drawing: Final product · Parts · Movement ── */
.concept-drawing {
  margin: 0 0 0.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem 1rem;
  box-shadow: 0 0 0 1px rgba(61, 156, 240, 0.12), var(--shadow);
  position: relative;
  overflow: hidden;
}
.concept-drawing::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, #3d9cf0, #2dd4a8, #f0b429, #a78bfa);
}
.concept-drawing-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
}
.concept-drawing-title {
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  margin: 0;
}
.concept-drawing-sub {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 0.15rem;
}
.concept-drawing-meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}
.concept-panes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}
@media (min-width: 900px) {
  .concept-panes {
    grid-template-columns: repeat(3, 1fr);
  }
}
.concept-pane {
  background: rgba(11, 13, 16, 0.65);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.concept-pane[data-pane="product"] { border-top: 2px solid #3d9cf0; }
.concept-pane[data-pane="parts"] { border-top: 2px solid #2dd4a8; }
.concept-pane[data-pane="movement"] { border-top: 2px solid #f0b429; }
.concept-pane-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0.45rem 0.65rem 0.25rem;
  border-bottom: 1px solid rgba(42, 49, 64, 0.7);
}
.concept-pane-art {
  padding: 0.35rem;
  flex: 1;
}
.concept-pane-art svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

/* Movement / product animations */
@keyframes ledChase {
  0%, 100% { opacity: 0.2; }
  15% { opacity: 1; }
  40% { opacity: 0.85; }
  70% { opacity: 0.35; }
}
.led-chase { opacity: 0.25; animation: ledChase 2.4s ease-in-out infinite; }
.led-chase.c1 { animation-delay: 0s; }
.led-chase.c2 { animation-delay: 0.28s; }
.led-chase.c3 { animation-delay: 0.56s; }
.led-chase.c4 { animation-delay: 0.84s; }
.led-chase.c5 { animation-delay: 1.12s; }
.led-chase.c6 { animation-delay: 1.4s; }

@keyframes ledPulseSoft {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}
.led-step { animation: ledPulseSoft 2.8s ease-in-out infinite; }
.led-step:nth-child(2) { animation-delay: 0.2s; }
.led-step:nth-child(3) { animation-delay: 0.4s; }
.led-step:nth-child(4) { animation-delay: 0.6s; }
.led-step:nth-child(5) { animation-delay: 0.8s; }
.led-step:nth-child(6) { animation-delay: 1s; }

@keyframes walkerClimb {
  0% { transform: translate(0, 0); opacity: 0.55; }
  20% { opacity: 1; }
  100% { transform: translate(170px, -95px); opacity: 0.85; }
}
.walker-up {
  animation: walkerClimb 3.6s ease-in-out infinite;
}

@keyframes wheelSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.wheel-spin {
  transform-box: fill-box;
  transform-origin: center;
  animation: wheelSpin 1.6s linear infinite;
}

@keyframes armSweep {
  0%, 100% { transform: rotate(-28deg); }
  50% { transform: rotate(32deg); }
}
.arm-sweep {
  transform-box: fill-box;
  transform-origin: center bottom;
  animation: armSweep 2.8s ease-in-out infinite;
}

@keyframes arrowPulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}
.arrow-pulse { animation: arrowPulse 1.8s ease-in-out infinite; }

@keyframes flowDash {
  to { stroke-dashoffset: -20; }
}
.flow-dash { animation: flowDash 1.2s linear infinite; }

@media (prefers-reduced-motion: reduce) {
  .led-chase, .led-step, .walker-up, .wheel-spin, .arm-sweep, .arrow-pulse, .flow-dash {
    animation: none !important;
  }
  .led-chase, .led-step { opacity: 0.9; }
}

.comprehension-panel {
  margin: 1.25rem 0 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.comp-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}
.comp-header h3 {
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.comp-tagline {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.comp-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}
.comp-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 0.9rem;
  border-top: 3px solid var(--border-strong);
}
.comp-card[data-block="sensors"] { border-top-color: #3d9cf0; }
.comp-card[data-block="control"] { border-top-color: #2dd4a8; }
.comp-card[data-block="output"] { border-top-color: #f0b429; }
.comp-card[data-block="power"] { border-top-color: #e8954a; }
.comp-card[data-block="app"] { border-top-color: #a78bfa; }
.comp-card-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}
.comp-card-title {
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  line-height: 1.3;
}
.comp-card-body {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}
.comp-logic {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
}
.comp-logic h4 {
  font-size: 0.8rem;
  font-family: var(--mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.55rem;
}
.comp-logic ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.comp-logic li {
  font-size: 0.85rem;
  color: var(--text);
  padding-left: 1.1rem;
  position: relative;
}
.comp-logic li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent);
}
.comp-diagram-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  overflow-x: auto;
}
.comp-diagram-wrap svg {
  width: 100%;
  min-width: 520px;
  height: auto;
  display: block;
}
.comp-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.35rem;
  background: linear-gradient(90deg, rgba(61,156,240,0.08), rgba(45,212,168,0.06), rgba(240,180,41,0.06), rgba(167,139,250,0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.65rem 0.75rem;
}
.comp-flow-step {
  flex: 1 1 120px;
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.45rem 0.55rem;
  background: rgba(11,13,16,0.55);
  border-radius: 4px;
  border: 1px solid transparent;
}
.comp-flow-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  background: var(--bg-hover);
  border: 1px solid var(--border-strong);
  flex-shrink: 0;
}
.comp-flow-step strong {
  display: block;
  font-size: 0.72rem;
  font-family: var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
}
.comp-flow-step span {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.3;
}
.comp-flow-arrow {
  display: none;
  align-self: center;
  color: var(--border-strong);
  font-family: var(--mono);
  font-size: 0.9rem;
}
@media (min-width: 900px) {
  .comp-flow-arrow { display: block; }
}

@media print {
  .topnav, .back-link, .wizard-nav-bar, .manual-actions, .footer-note, .toast { display: none !important; }
  .screen { display: none !important; }
  .screen[data-screen="manual"].active { display: block !important; max-width: 100%; }
  .manual-doc { box-shadow: none; border: none; }
  body { background: #fff; color: #111; }
}


/* ── Multi-vendor badges ── */
.vendor-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.45rem;
}
.vendor-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(11,13,16,0.7);
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.vendor-badge:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(61,156,240,0.12);
}
.vendor-badge.primary {
  border-color: rgba(45,212,168,0.55);
  color: #2dd4a8;
}
.vendor-badge .vb-price {
  color: var(--success);
  font-weight: 600;
}
.vendor-digikey { border-color: rgba(204,0,0,0.35); }
.vendor-mouser { border-color: rgba(27,117,188,0.4); }
.vendor-lcsc { border-color: rgba(240,180,41,0.4); }
.vendor-amazon { border-color: rgba(255,153,0,0.4); }
.vendor-adafruit { border-color: rgba(0,163,224,0.45); }
.vendor-sparkfun { border-color: rgba(226,35,26,0.4); }
.vendor-aliexpress { border-color: rgba(230,46,4,0.35); }
.vendor-local { border-color: rgba(167,139,250,0.45); }

.parts-table td { vertical-align: top; }

/* ── Improvise vs buy critical ── */
.improvise-host { margin: 1.25rem 0 0.5rem; }
.improvise-panel {
  padding: 1rem 1.1rem 1.15rem;
  border-color: rgba(240,180,41,0.35);
  box-shadow: 0 0 0 1px rgba(240,180,41,0.12), var(--shadow);
}
.improvise-header h3 {
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.25rem;
}
.improvise-header .muted { font-size: 0.85rem; margin: 0 0 0.85rem; }
.improvise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}
@media (min-width: 800px) {
  .improvise-grid { grid-template-columns: 1fr 1fr; }
}
.improvise-col {
  background: rgba(11,13,16,0.55);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem 0.85rem;
}
.improvise-col.buy-col { border-top: 3px solid #e8954a; }
.improvise-col.diy-col { border-top: 3px solid #2dd4a8; }
.improvise-col-label { margin-bottom: 0.55rem; }
.improv-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}
.improv-tag.buy {
  background: rgba(232,149,74,0.15);
  color: #e8954a;
  border: 1px solid rgba(232,149,74,0.35);
}
.improv-tag.diy {
  background: rgba(45,212,168,0.12);
  color: #2dd4a8;
  border: 1px solid rgba(45,212,168,0.35);
}
.improvise-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.improv-item {
  padding: 0.45rem 0.5rem;
  border-radius: 4px;
  background: rgba(18,21,26,0.65);
  border-left: 3px solid transparent;
}
.improv-item.critical-item { border-left-color: #e8954a; }
.improv-item.improv-diy { border-left-color: #2dd4a8; }
.improv-part {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}
.improv-why {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}
.improvise-tip {
  margin-top: 0.85rem;
  padding: 0.65rem 0.75rem;
  font-size: 0.85rem;
  background: linear-gradient(90deg, rgba(232,149,74,0.1), rgba(45,212,168,0.08));
  border: 1px dashed var(--border-strong);
  border-radius: 6px;
  color: var(--text);
  line-height: 1.4;
}



.vendor-price-note {
  font-size: 0.72rem;
  color: var(--muted, #8b93a7);
  margin-top: 0.35rem;
}
.gh-live {
  font-size: 0.72rem;
  margin-top: 0.2rem;
}
.part-price a {
  color: var(--accent, #3d9cf0);
  text-decoration: none;
  font-size: 0.82rem;
}
.part-price a:hover { text-decoration: underline; }
.vendor-badge .vb-price {
  color: var(--muted, #8b93a7);
  font-weight: 500;
  font-size: 0.7rem;
  text-transform: lowercase;
}

/* ── Project showcase board (v2.6 · kit-card infographic) ── */
.showcase-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1rem;
}
.showcase-badge {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  border: 1px solid rgba(61, 156, 240, 0.35);
  background: rgba(61, 156, 240, 0.08);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  white-space: nowrap;
}
.showcase-board-host {
  padding: 0.85rem;
  overflow: auto;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.03), transparent 40%),
    var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: 0 0 0 1px rgba(61, 156, 240, 0.1), var(--shadow);
}
.showcase-board-host svg {
  display: block;
  width: 100%;
  min-width: 720px;
  height: auto;
  border-radius: 10px;
}
.showcase-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.25rem 0 0.5rem;
}
.showcase-cta-hint {
  font-size: 0.82rem;
  margin-bottom: 0.5rem;
}
.showcase-mod-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.showcase-photo {
  margin: 0 0 1rem;
  width: 100%;
}
.showcase-photo img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.22);
  background: #0d1118;
}
.showcase-photo-caption {
  margin-top: 0.55rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}
.showcase-svg-fallback {
  margin-top: 0.75rem;
  border-top: 1px solid var(--border);
  padding-top: 0.65rem;
}
.showcase-svg-fallback summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 0.65rem;
  user-select: none;
}
.showcase-svg-fallback[open] summary {
  margin-bottom: 0.85rem;
}
.showcase-board-host:has(.showcase-photo) {
  overflow: visible;
}
.showcase-board-host:has(.showcase-photo) svg {
  min-width: 0;
}

@media (max-width: 720px) {
  .showcase-board-host:has(.showcase-photo) svg { min-width: 640px; }
}


@media (max-width: 720px) {
  .showcase-cta-row .btn-lg { width: 100%; }
  .showcase-board-host svg { min-width: 640px; }
}

/* ── Innovate category filters (All | Robots | Home automation) ── */
.innovate-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.35rem 0 0.55rem;
}
.innovate-filter-chip {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.innovate-filter-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(61, 156, 240, 0.1);
}
.innovate-filter-chip.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(61, 156, 240, 0.16);
  box-shadow: 0 0 0 1px rgba(61, 156, 240, 0.2);
}
.innovate-filter-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}


/* ── v2.10 vendor groups, cart, print help, manual brand ── */
.vendor-badges-wrap { margin-top: 0.35rem; }
.vendor-group-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin: 0.35rem 0 0.2rem;
}
.vendor-badge.preferred {
  border-color: rgba(45,212,168,0.75) !important;
  box-shadow: 0 0 0 1px rgba(45,212,168,0.25);
}
.vendor-arrow { border-color: rgba(0,102,153,0.45); }
.vendor-newark { border-color: rgba(255,102,0,0.45); }
.vendor-pololu { border-color: rgba(0,128,0,0.4); }
.vendor-seeed { border-color: rgba(200,16,46,0.4); }
.vendor-robotshop { border-color: rgba(0,153,204,0.4); }
.vendor-banggood { border-color: rgba(255,102,0,0.35); }
.vendor-mcmaster { border-color: rgba(90,90,90,0.5); }
.vendor-jlcpcb { border-color: rgba(0,91,172,0.45); }
.vendor-pcbway { border-color: rgba(0,150,136,0.45); }

.cart-fav-bar, .collective-cart-panel, .print-help-panel {
  margin: 0.75rem 0 1rem;
  padding: 0.9rem 1rem;
}
.cart-fav-row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.cart-fav-label { font-size: 0.9rem; display: flex; gap: 0.5rem; align-items: center; }
.fav-vendor-select {
  background: var(--bg-elevated, #12151a);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 0.35rem 0.5rem;
  font-family: var(--mono);
  font-size: 0.8rem;
}
.cart-honest { font-size: 0.78rem; max-width: 42rem; }
.cart-group { border: 1px solid var(--border); border-radius: 6px; padding: 0.55rem 0.7rem; margin: 0.45rem 0; background: rgba(11,13,16,0.45); }
.cart-group-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.35rem; }
.cart-group-count { font-family: var(--mono); font-size: 0.72rem; color: var(--text-muted); }
.cart-lines { list-style: none; margin: 0; padding: 0; }
.cart-line { display: flex; flex-wrap: wrap; gap: 0.4rem 0.65rem; align-items: baseline; padding: 0.2rem 0; font-size: 0.85rem; }
.cart-line-name { font-weight: 600; }
.cart-line-meta { font-size: 0.72rem; font-family: var(--mono); }
.cart-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-top: 0.75rem; }
.cart-subtotal { font-family: var(--mono); font-size: 0.75rem; }

.print-help-host { margin: 0.75rem 0 1rem; }
.print-parts-list { margin: 0.5rem 0; padding-left: 1.1rem; }
.print-parts-list li { margin: 0.35rem 0; }
.print-help-actions { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.55rem; }

.manual-brand { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; border-bottom: 2px solid rgba(45,212,168,0.55); padding-bottom: 0.45rem; margin-bottom: 0.85rem; }
.manual-brand-mark { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; }
.manual-intro { color: var(--text-muted); font-size: 0.95rem; }
.manual-footer { margin-top: 1.5rem; font-size: 0.8rem; color: var(--text-muted); border-top: 1px solid var(--border); padding-top: 0.75rem; }
.gpio-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; margin: 0.5rem 0 1rem; }
.gpio-table th, .gpio-table td { border: 1px solid var(--border); padding: 0.35rem 0.5rem; text-align: left; }
.gpio-table th { background: rgba(61,156,240,0.08); }
.openscad-stub { background: rgba(11,13,16,0.65); padding: 0.75rem; font-size: 0.75rem; overflow: auto; border: 1px solid var(--border); border-radius: 6px; }


/* ── Precise order (v2.10.1) ─────────────────────────── */
.cart-ux-note { font-size: 0.82rem; margin: 0 0 0.75rem; line-height: 1.45; }
.cart-must { border-color: rgba(45, 212, 168, 0.45); }
.cart-optional { border-color: rgba(168, 178, 192, 0.35); }
.cart-line-body { display: flex; flex-direction: column; gap: 0.15rem; flex: 1; min-width: 0; }
.cart-line-why { font-size: 0.78rem; color: var(--text-muted); line-height: 1.35; }
.order-section h3 { display: flex; align-items: center; gap: 0.5rem; }
.must-order-section { border: 1px solid rgba(45, 212, 168, 0.35); }
.optional-order-section { border: 1px solid rgba(140, 150, 170, 0.28); opacity: 0.98; }
.order-role-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.02em;
  padding: 0.12rem 0.4rem;
  border-radius: 4px;
  margin-bottom: 0.25rem;
  border: 1px solid transparent;
}
.order-role-badge.must-critical {
  background: rgba(232, 88, 88, 0.15);
  color: #f0a0a0;
  border-color: rgba(232, 88, 88, 0.4);
}
.order-role-badge.must-cots {
  background: rgba(45, 212, 168, 0.12);
  color: #2dd4a8;
  border-color: rgba(45, 212, 168, 0.4);
}
.order-role-badge.opt {
  background: rgba(61, 156, 240, 0.1);
  color: #8bb8e8;
  border-color: rgba(61, 156, 240, 0.35);
}
.order-role-badge.improv {
  background: rgba(240, 180, 41, 0.1);
  color: #f0b429;
  border-color: rgba(240, 180, 41, 0.35);
}
.part-identity { margin-bottom: 0.35rem; }
.part-why { font-size: 0.84rem; color: var(--text); margin: 0.35rem 0 0.25rem; line-height: 1.4; }
.part-spare, .part-alts { font-size: 0.75rem; color: var(--text-muted); margin: 0.15rem 0; font-family: var(--mono); }
.part-alts code {
  background: rgba(11, 13, 16, 0.65);
  padding: 0.05rem 0.3rem;
  border-radius: 3px;
  border: 1px solid var(--border);
  font-size: 0.72rem;
}
.part-qty-cell { white-space: nowrap; vertical-align: top; }
.part-qty { display: flex; flex-direction: column; align-items: flex-start; margin-bottom: 0.35rem; }
.part-qty .qty-num {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--success, #2dd4a8);
  line-height: 1;
}
.part-qty .qty-label { font-size: 0.68rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.order-precise-table .vendor-badges-wrap { margin-top: 0.45rem; }


/* ── Start simple (v2.10.2) ──────────────────────────── */
.start-simple-section {
  margin: 1.25rem 0 1rem;
  padding: 1rem 1.1rem 1.15rem;
  border-radius: 12px;
  border: 1px solid rgba(45, 212, 168, 0.35);
  background: linear-gradient(160deg, rgba(45, 212, 168, 0.08), rgba(11, 13, 16, 0.55));
}
.start-simple-header { margin-bottom: 0.75rem; }
.start-simple-eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #2dd4a8;
  margin-bottom: 0.35rem;
}
.start-simple-title {
  font-size: 1.25rem;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}
.start-simple-lead {
  margin: 0;
  max-width: 42rem;
  font-size: 0.9rem;
  line-height: 1.45;
}
.start-simple-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}
.start-simple-chip {
  align-items: flex-start !important;
  min-width: 9.5rem;
  max-width: 14rem;
  padding: 0.55rem 0.7rem !important;
  border-color: rgba(45, 212, 168, 0.4) !important;
  background: rgba(11, 13, 16, 0.65) !important;
}
.start-simple-chip:hover {
  border-color: rgba(45, 212, 168, 0.75) !important;
  box-shadow: 0 0 0 1px rgba(45, 212, 168, 0.25);
}
.innovate-chip-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  text-align: left;
}
.innovate-chip-label { font-weight: 600; font-size: 0.85rem; line-height: 1.25; }
.innovate-chip-meta {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}


/* ─── Beginner board gate (v2.11) ─── */
.board-gate-panel {
  margin-bottom: 1rem;
  border: 1px solid rgba(45, 212, 168, 0.35);
  background: linear-gradient(180deg, rgba(45, 212, 168, 0.08), rgba(11, 13, 16, 0.4));
}
.board-gate-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}
.board-gate-lead { margin: 0 0 0.85rem; font-size: 0.88rem; }
.board-gate-choices {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}
.board-gate-choice.active,
.board-type-btn.active {
  box-shadow: 0 0 0 2px rgba(45, 212, 168, 0.55);
  border-color: rgba(45, 212, 168, 0.8) !important;
}
.board-type-row {
  display: none;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  margin-bottom: 0.65rem;
}
.board-type-row.show { display: flex; }
.board-gate-hint {
  font-size: 0.85rem;
  margin: 0.35rem 0 0;
  color: var(--text-muted);
}
.board-gate-warn {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: #f0b429;
}
.board-gate-manual-note {
  font-size: 0.9rem;
  padding: 0.55rem 0.75rem;
  border-left: 3px solid rgba(45, 212, 168, 0.7);
  background: rgba(45, 212, 168, 0.07);
  margin: 0.75rem 0 1rem;
}