/* Theme tokens shared by the full single-page demo. */
:root {
  --base00: #263238;
  --base01: #2e3c43;
  --base02: #314549;
  --base03: #546e7a;
  --base04: #b2ccd6;
  --base05: #eeffff;
  --base07: #ffffff;
  --base08: #f07178;
  --base0a: #ffcb6b;
  --base0b: #c3e88d;
  --base0c: #89ddff;
  --base0d: #82aaff;
  --base0e: #c792ea;
  --base0f: #ff5370;
  --bg: var(--base00);
  --off-bg: var(--base01);
  --inner-bg: var(--base02);
  --fg: var(--base05);
  --off-fg: var(--base04);
  --muted: var(--base03);
  --link: var(--base0d);
  --hover: var(--base0c);
  --highlight: var(--base0a);
  --logo: var(--base0b);
  --danger: var(--base08);
  --border: rgba(178, 204, 214, 0.18);
  --mono: "Fira Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

/* Page shell and header status. */
body {
  margin: 0;
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.5rem;
  background: var(--bg);
  color: var(--fg);
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  max-width: 78rem;
  margin: 1rem auto 0;
  padding: 0 1rem;
}

.eyebrow {
  margin: 0;
  color: var(--logo);
  font-size: 1rem;
}

.site-header h1 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.site-header h1::before {
  content: "# ";
  color: var(--muted);
}

.site-header p {
  margin: 0;
  color: var(--off-fg);
}

.health {
  flex-shrink: 0;
  font-size: 0.78rem;
  color: var(--highlight);
  white-space: nowrap;
  border: 1px solid var(--border);
  padding: 0.25rem 0.5rem;
  background: var(--inner-bg);
}

.layout {
  display: grid;
  grid-template-columns: 22rem minmax(0, 1fr);
  gap: 2rem;
  padding: 2rem 1rem 1rem;
  max-width: 78rem;
  margin: 0 auto;
}

/* Control cards, form fields, and action buttons. */
.controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card, .result-card {
  background: var(--off-bg);
  border: 1px solid var(--border);
  padding: 1rem;
}

.card h2, .result-card h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
}

.card h2::before, .result-card h2::before {
  content: "## ";
  color: var(--muted);
}

label {
  display: block;
  margin: 0.7rem 0;
  font-size: 0.82rem;
  color: var(--off-fg);
}

input, select, textarea {
  display: block;
  width: 100%;
  margin-top: 0.28rem;
  border: 1px solid var(--border);
  padding: 0.6rem 0.7rem;
  font: inherit;
  color: var(--fg);
  background: var(--inner-bg);
}

input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(137, 221, 255, 0.28);
  border-color: var(--hover);
}

textarea {
  resize: vertical;
  min-height: 96px;
  font-size: 0.78rem;
}

button {
  width: 100%;
  border: 1px solid var(--link);
  padding: 0.68rem 0.9rem;
  margin-top: 0.4rem;
  font-weight: 700;
  color: var(--bg);
  background: var(--link);
  cursor: pointer;
  font-family: var(--mono);
}

button:hover {
  border-color: var(--hover);
  background: var(--hover);
}
button:disabled { opacity: 0.55; cursor: not-allowed; }

button.secondary {
  background: transparent;
  color: var(--link);
  border-color: var(--border);
}

button.secondary:hover {
  color: var(--bg);
  border-color: var(--hover);
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}

.note p, .small {
  color: var(--off-fg);
  font-size: 0.82rem;
  line-height: 1.45;
}

.builder-list {
  list-style: none;
  margin: 0.8rem 0 0;
  padding: 0;
  color: var(--off-fg);
  font-size: 0.78rem;
  max-height: 160px;
  overflow: auto;
}

.builder-list li {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.25rem 0;
  border-bottom: 1px dashed rgba(176, 190, 197, 0.16);
}

/* Result panel and board overlay stage. */
.result-header {
  text-align: center;
  margin-bottom: 0.85rem;
}

.result-header h2 { margin-bottom: 0.25rem; }

.result-header p {
  margin: 0;
  color: var(--off-fg);
  font-size: 0.84rem;
}

.result-note {
  max-width: 760px;
  margin: 0 auto 0.85rem;
  color: var(--off-fg);
  font-size: 0.78rem;
  line-height: 1.45;
  text-align: center;
}

.board-stage {
  position: relative;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg);
}

.board-stage img {
  display: block;
  width: 100%;
  height: auto;
}

.board-stage svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: auto;
}

/* SVG overlay interaction layers. */
.click-target {
  cursor: crosshair;
}

.route-marker, .builder-marker {
  pointer-events: none;
}

.hover-marker {
  pointer-events: none;
  fill: none;
  stroke: var(--highlight);
  stroke-width: 0.55;
  opacity: 0.9;
}

.json-block {
  margin-top: 1rem;
  color: var(--off-fg);
}

.json-block pre {
  overflow: auto;
  max-height: 300px;
  padding: 1rem;
  background: var(--inner-bg);
  color: var(--off-fg);
  border: 1px solid var(--border);
  font-size: 0.76rem;
}

/* Stack controls above the board on narrower screens. */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; }
}


/* Supporting notes, explanations, links, and footer content. */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.checkbox-label input {
  width: auto;
  margin: 0;
}

.warning-box {
  margin: 0.7rem auto 0.85rem;
  max-width: 760px;
  border: 1px solid rgba(255, 203, 107, 0.55);
  background: rgba(255, 203, 107, 0.12);
  color: var(--highlight);
  padding: 0.65rem 0.8rem;
  font-size: 0.8rem;
  text-align: left;
  white-space: pre-line;
}

.clear-board {
  width: auto;
  min-width: 150px;
  margin: 0.85rem auto 0;
  display: inline-block;
}


.field-help {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.35;
}

.explain dl {
  margin: 0;
}

.explain dt {
  color: var(--highlight);
  font-size: 0.78rem;
  margin-top: 0.75rem;
}

.explain dt:first-child {
  margin-top: 0;
}

.explain dd {
  margin: 0.22rem 0 0;
  color: var(--off-fg);
  font-size: 0.78rem;
  line-height: 1.45;
}

.explain code {
  color: var(--off-fg);
  background: var(--inner-bg);
  border: 1px solid var(--border);
  padding: 0.05rem 0.25rem;
  font-size: 0.74rem;
}

.link-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--off-fg);
  font-size: 0.82rem;
  line-height: 1.6;
}

.link-list li::marker {
  content: "* ";
  color: var(--muted);
}

.link-list a {
  color: var(--link);
}

.link-list a:hover {
  color: var(--hover);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  max-width: 78rem;
  margin: 0 auto 1.5rem;
  padding: 0 1rem;
  color: var(--off-fg);
  font-size: 0.82rem;
}

.site-footer a {
  color: var(--link);
}

.site-footer a:hover {
  color: var(--hover);
}


#data-acknowledgement-card p,
#model-disclaimer-card p {
  color: var(--off-fg);
  font-size: 0.8rem;
  line-height: 1.45;
}

#data-acknowledgement-card a {
  color: var(--link);
}

#data-acknowledgement-card a:hover {
  color: var(--hover);
}