:root {
  --ink: #12161c;
  --muted: #5c6672;
  --line: rgba(18, 22, 28, 0.12);
  --panel: #f3f5f7;
  --accent: #0f6e5f;
  --route: #5a28b4;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --display: "Syne", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: #e9edf1;
}

.top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(243, 245, 247, 0.95);
}

.brand {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.6rem;
  letter-spacing: -0.04em;
  color: var(--ink);
  text-decoration: none;
}

.phase {
  margin: 0.15rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 600;
}

.brief {
  margin: 0;
  max-width: 28rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.4;
}

.layout {
  display: grid;
  grid-template-columns: minmax(260px, 300px) 1fr;
  min-height: calc(100vh - 5rem);
}

.panel {
  padding: 1.1rem 1rem 2rem;
  background: var(--panel);
  border-right: 1px solid var(--line);
}

.panel h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.1rem;
}

.lede {
  margin: 0.4rem 0 1rem;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.4;
}

.mode {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  margin: 0 0 1rem;
  background: #fff;
}

.mode legend {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  padding: 0 0.25rem;
}

.mode label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  margin: 0.3rem 0;
  cursor: pointer;
}

.ctrl {
  display: block;
  margin-bottom: 0.95rem;
}

.ctrl > span {
  display: flex;
  justify-content: space-between;
  font-size: 0.86rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.ctrl em {
  font-style: normal;
  font-family: var(--mono);
  color: var(--accent);
  font-weight: 500;
}

.ctrl small {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.3;
}

.ctrl input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.ctrl.check {
  display: flex;
  gap: 0.45rem;
  align-items: flex-start;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
}

.btn {
  appearance: none;
  border: none;
  background: var(--ink);
  color: #fff;
  font: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.55rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  width: 100%;
}

.btn:hover { background: #000; }

.status {
  margin: 0.75rem 0 0;
  font-size: 0.78rem;
  font-family: var(--mono);
  color: var(--muted);
  line-height: 1.4;
}

.maps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding: 0.75rem;
  align-content: start;
}

.card {
  margin: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.card figcaption {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--line);
  background: #fafbfc;
}

.card figcaption em {
  font-style: normal;
  font-family: var(--mono);
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  color: var(--route);
  font-size: 0.74rem;
}

.card canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #ddd;
}

.panel h2.sub {
  margin: 1.35rem 0 0.35rem;
  font-size: 1rem;
}

.brief a {
  color: var(--accent);
  font-weight: 600;
}

.bounds-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  margin-bottom: 0.85rem;
}

.bounds-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bounds-grid input {
  font: inherit;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.35rem 0.4rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  text-transform: none;
  letter-spacing: 0;
}

.btn-secondary {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  margin-top: 0.45rem;
}

.btn-secondary:hover {
  background: #fafbfc;
}

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
}

.ctrl select,
.ctrl input[type="file"] {
  width: 100%;
  font: inherit;
  font-size: 0.86rem;
  padding: 0.35rem 0.4rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.compare-page {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.compare-layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(240px, 280px) 1fr;
  min-height: 0;
}

.compare-panel {
  overflow: auto;
}

.compare-map {
  min-height: 0;
  height: 100%;
  background: #dfe4ea;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .maps { grid-template-columns: 1fr; }
  .compare-layout { grid-template-columns: 1fr; grid-template-rows: auto 55vh; }
}