:root {
  --bg-0: #f7efe0;
  --bg-1: #f0d9b5;
  --panel: #fff9f0;
  --ink: #1b2d2a;
  --muted: #546663;
  --line: #d8c8ad;
  --accent: #0e7a6b;
  --accent-strong: #0b5f54;
  --warn: #a84d2a;
  --ok: #0f7a31;
  --shadow: 0 16px 40px rgba(35, 35, 30, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 15%, rgba(14, 122, 107, 0.2), transparent 33%),
    radial-gradient(circle at 85% 15%, rgba(172, 91, 45, 0.18), transparent 30%),
    linear-gradient(155deg, var(--bg-0), var(--bg-1));
}

.app-shell {
  max-width: 1480px;
  margin: 0 auto;
  padding: 24px;
}

.hero {
  margin-bottom: 18px;
}

.hero h1 {
  margin: 0;
  letter-spacing: 0.08em;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1;
}

.hero p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.97rem;
}

.layout {
  display: grid;
  grid-template-columns: 360px minmax(620px, 1fr) 300px;
  gap: 16px;
  align-items: start;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel) 92%, white 8%);
  box-shadow: var(--shadow);
  padding: 16px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 0.97rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.controls {
  display: grid;
  gap: 10px;
}

.field {
  display: grid;
  gap: 6px;
}

.field span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}

select,
input,
button,
.file-btn {
  font: inherit;
}

select,
input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 10px;
  background: #fffefb;
  color: var(--ink);
}

.two-up {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.mode-btn {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  background: #fff;
  color: #314644;
  font-weight: 700;
  cursor: pointer;
}

.mode-btn.active {
  border-color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 16%, white 84%);
  color: #083a35;
}

.tool-btn {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 9px 8px;
  min-height: 44px;
  font-size: 0.83rem;
  font-weight: 600;
  color: #344;
  cursor: pointer;
}

.tool-btn.active {
  border-color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 16%, white 84%);
  color: #083a35;
}

.tool-btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

.tool-help {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

button,
.file-btn {
  border: 1px solid var(--accent-strong);
  color: white;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  border-radius: 10px;
  padding: 10px 12px;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
}

#clear-btn {
  border-color: #8f3e22;
  background: linear-gradient(180deg, #b35833, #8f3e22);
}

#load-input {
  display: none;
}

#gmns-input {
  display: none;
}

.legacy-btn {
  border-color: var(--line);
  color: #3f5351;
  background: #fff;
}

.slot-pad {
  display: block;
}

.status {
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px dashed var(--line);
  background: #fff;
  color: #354744;
  font-size: 0.88rem;
}

.canvas-panel {
  display: grid;
  gap: 8px;
  justify-items: center;
}

#route-canvas {
  width: min(100%, 620px);
  height: auto;
  border-radius: 14px;
  border: 1px solid #c2b08f;
  background: #fdfaf2;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.metrics {
  display: grid;
  gap: 10px;
}

.metric-list {
  display: grid;
  gap: 8px;
  margin: 0;
}

.metric-list div {
  display: flex;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 8px 10px;
  background: #fff;
}

.metric-list dt {
  font-size: 0.86rem;
  color: #4d5e5b;
}

.metric-list dd {
  margin: 0;
  font-weight: 700;
}

.objective-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  color: #4d5e5b;
  font-size: 0.9rem;
}

.connectivity {
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  font-weight: 700;
}

.connectivity.waiting {
  background: #fff;
  border: 1px dashed var(--line);
  color: #4d5e5b;
}

.connectivity.ok {
  background: #e9f8ee;
  border: 1px solid #9bd2ad;
  color: var(--ok);
}

.connectivity.bad {
  background: #fff0ea;
  border: 1px solid #e8b8a7;
  color: var(--warn);
}

.completion {
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  font-weight: 700;
}

.completion.pending {
  background: #fff;
  border: 1px dashed var(--line);
  color: #4d5e5b;
}

.completion.partial {
  background: #fff6e9;
  border: 1px solid #e4c283;
  color: #8b5d12;
}

.completion.complete {
  background: #e9f8ee;
  border: 1px solid #9bd2ad;
  color: var(--ok);
  animation: completion-pulse 1.1s ease-out 1;
}

@keyframes completion-pulse {
  0% {
    transform: scale(1);
  }
  45% {
    transform: scale(1.03);
  }
  100% {
    transform: scale(1);
  }
}

@media (max-width: 1280px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .panel {
    width: 100%;
  }

  .canvas-panel {
    order: -1;
  }
}