:root {
  --ink: #1c1b18;
  --paper: #f6f1e4;
  --paper-2: #ede5d0;
  --line: #c9bf9f;
  --copper: #b06b3a;
  --copper-2: #8a4f28;
  --muted: #6d6353;
  --shadow: 0 1px 0 rgba(28, 27, 24, 0.06), 0 8px 24px rgba(28, 27, 24, 0.08);
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--copper-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 4px solid var(--copper);
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.brand h1 {
  font-size: 20px;
  margin: 0;
  letter-spacing: 0.2px;
}
.brand .tagline {
  margin: 2px 0 0;
  color: #d6cdb6;
  font-size: 13px;
}
.brand .logo {
  color: var(--copper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: #2a2925;
  border: 1px solid #3a3833;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 14px;
}
.topnav a {
  color: #e9e1cd;
  padding: 6px 2px;
  border-bottom: 1px solid transparent;
}
.topnav a:hover {
  color: var(--copper);
  border-bottom-color: var(--copper);
  text-decoration: none;
}

.shell {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr) minmax(260px, 320px);
  gap: 22px;
  padding: 24px;
  max-width: 1400px;
  margin: 0 auto;
  align-items: start;
}

.panel {
  background: #fffdf6;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.panel h2 {
  margin: 0 0 6px;
  font-size: 18px;
  letter-spacing: 0.2px;
}
.panel h3 {
  margin: 18px 0 6px;
  font-size: 15px;
  color: var(--copper-2);
}
.panel-hint {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 13px;
}

.index-panel {
  grid-column: 1;
  position: sticky;
  top: 18px;
  max-height: calc(100vh - 36px);
  overflow: auto;
}
.search-row input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-size: 14px;
  color: var(--ink);
}
.console-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.console-btn {
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.console-btn:hover {
  background: var(--paper-2);
  border-color: var(--copper-2);
}
.console-btn.is-active {
  background: var(--copper);
  color: #fff;
  border-color: var(--copper-2);
}

.add-custom {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}
.custom-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.custom-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
}
.custom-form input {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  background: #fff;
}
.custom-form button {
  padding: 10px 12px;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
}
.custom-form button:hover {
  background: var(--copper-2);
}

.routing-panel {
  grid-column: 2;
  grid-row: 1 / span 2;
}
.routing-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.routing-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.badge {
  background: var(--paper-2);
  border: 1px solid var(--line);
  color: var(--copper-2);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge.subtle {
  color: var(--muted);
}

.signal-flow {
  margin-top: 14px;
  padding: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.signal-flow h3 {
  margin-top: 0;
  color: var(--ink);
}
.flow-steps {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.flow-steps li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 10px;
  align-items: center;
  font-size: 14px;
}
.step-label {
  display: inline-block;
  padding: 4px 8px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 6px;
  font-size: 12px;
  text-align: center;
  font-weight: 600;
}

.patch-block, .bus-block {
  margin-top: 16px;
}
.patch-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.patch-table th, .patch-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.patch-table th {
  background: var(--paper-2);
  color: var(--copper-2);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.patch-table tr:last-child td {
  border-bottom: none;
}
.patch-table tr:hover td {
  background: var(--paper);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.action-btn {
  padding: 10px 14px;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
}
.action-btn:hover {
  background: var(--copper-2);
}
.action-btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.action-btn.ghost:hover {
  background: var(--paper-2);
}

.scenarios-panel {
  grid-column: 3;
  position: sticky;
  top: 18px;
}
.scenario-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.scenario-tab {
  flex: 1 1 auto;
  padding: 8px 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  color: var(--ink);
}
.scenario-tab:hover {
  border-color: var(--copper-2);
  background: var(--paper);
}
.scenario-tab.is-active {
  background: var(--copper);
  color: #fff;
  border-color: var(--copper-2);
}
.scenario {
  margin-top: 14px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.scenario h3 {
  margin-top: 0;
  color: var(--ink);
}
.scenario-list {
  margin: 8px 0 0;
  padding-left: 20px;
  font-size: 14px;
}
.scenario-list li {
  margin-bottom: 4px;
}

.mistakes, .edge-cases {
  margin-top: 16px;
  padding: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.mistakes ul, .edge-cases dl {
  margin: 8px 0 0;
  font-size: 14px;
}
.mistakes li {
  margin-bottom: 4px;
}
.edge-cases dt {
  font-weight: 600;
  color: var(--copper-2);
  margin-top: 8px;
}
.edge-cases dd {
  margin: 0 0 4px;
  color: var(--ink);
}

.notes-panel {
  grid-column: 3;
  grid-row: 2 / span 2;
}
#studio-notes {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 13px;
  color: var(--ink);
  background: #fff;
  resize: vertical;
}
.notes-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}
.save-banner {
  margin-top: 16px;
  padding: 14px;
  background: var(--paper);
  border: 1px dashed var(--copper-2);
  border-radius: 8px;
}
.save-banner h3 {
  margin-top: 0;
  color: var(--copper-2);
}

.supporting {
  grid-column: 1 / -1;
  background: #fffdf6;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin: 0 24px 24px;
  max-width: 1400px;
  width: calc(100% - 48px);
  justify-self: center;
}
.supporting h2 {
  font-size: 20px;
  margin-top: 0;
}
.supporting h3 {
  font-size: 16px;
  margin-top: 18px;
  color: var(--copper-2);
}
.supporting p {
  font-size: 15px;
  color: var(--ink);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  margin-top: 24px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
}
.footer p { margin: 0; color: #d6cdb6; }
.footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.footer a { color: var(--copper); }
.footer a:hover { color: #fff; }

@media (max-width: 1100px) {
  .shell {
    grid-template-columns: 1fr;
  }
  .index-panel, .routing-panel, .scenarios-panel, .notes-panel {
    grid-column: 1;
    grid-row: auto;
    position: static;
    max-height: none;
  }
  .supporting {
    width: 100%;
    margin: 0 0 24px;
  }
}

@media (max-width: 600px) {
  .topbar { padding: 14px 16px; }
  .shell { padding: 16px; gap: 16px; }
  .panel { padding: 14px; }
  .flow-steps li { grid-template-columns: 70px 1fr; font-size: 13px; }
  .footer { padding: 14px 16px; }
}

@media print {
  body { background: #fff; }
  .topbar, .topnav, .index-panel, .scenarios-panel, .action-row, .notes-actions, .footer, .save-banner { display: none; }
  .shell { display: block; padding: 0; }
  .panel { box-shadow: none; border: none; padding: 0; margin-bottom: 16px; }
  .supporting { border: none; box-shadow: none; padding: 0; }
}


/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}