:root {
  color-scheme: dark;
  --bg: #111827;
  --panel: #1f2937;
  --line: rgba(255,255,255,.12);
  --text: #f9fafb;
  --muted: #cbd5e1;
  --pink: #f472b6;
  --teal: #2dd4bf;
  --amber: #fbbf24;
  --blue: #60a5fa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(244,114,182,.18), transparent 32rem),
    linear-gradient(135deg, #111827 0%, #172033 52%, #18202c 100%);
  color: var(--text);
}

.app {
  width: min(960px, 100%);
  margin: 0 auto;
  padding: 20px;
}

.hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--teal);
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 4.6rem);
  line-height: 1;
  letter-spacing: 0;
}

.lead {
  margin: 10px 0 0;
  max-width: 720px;
  color: var(--muted);
  line-height: 1.6;
}

.hub-link,
button,
.support-strip a {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  background: rgba(255,255,255,.08);
  text-decoration: none;
  font-weight: 800;
}

.hub-link {
  display: inline-flex;
  align-items: center;
  padding: 0 16px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.stats div {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(31,41,55,.76);
}

.stats span {
  display: block;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 800;
}

.stats strong {
  display: block;
  margin-top: 2px;
  font-size: 1.5rem;
}

.game-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(17,24,39,.72);
  padding: 14px;
}

.station-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.station {
  position: relative;
  min-height: 98px;
  padding: 10px;
  border: 2px solid var(--station);
  border-radius: 8px;
  background: color-mix(in srgb, var(--station) 16%, #111827);
  overflow: hidden;
}

.station b {
  display: block;
  font-size: 1.9rem;
}

.station span {
  display: block;
  margin-top: 4px;
  color: var(--text);
  font-weight: 800;
}

.station small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
}

.station.active {
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--station) 42%, transparent);
}

.station.active small {
  color: var(--amber);
  font-weight: 900;
}

.belt-wrap {
  margin-top: 14px;
  padding: 18px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,.08) 0 18px, transparent 18px 36px),
    rgba(15,23,42,.9);
}

.belt {
  display: grid;
  grid-template-columns: repeat(5, minmax(92px, 1fr));
  gap: 10px;
  min-height: 132px;
}

.item {
  min-height: 112px;
  border: 2px solid var(--item);
  border-radius: 8px;
  background: color-mix(in srgb, var(--item) 22%, #111827);
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transform: translateY(0);
  transition: transform .12s ease, filter .12s ease;
}

.item:hover,
.item:focus-visible {
  transform: translateY(-4px);
  filter: brightness(1.12);
  outline: none;
}

.item .icon {
  font-size: 2rem;
}

.item .name {
  font-size: .9rem;
  font-weight: 900;
}

.message {
  margin: 12px 0 0;
  color: var(--muted);
  min-height: 1.5em;
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  margin: 14px 0;
}

button {
  padding: 0 14px;
  cursor: pointer;
}

button.primary {
  color: #111827;
  background: var(--amber);
  border-color: transparent;
}

button:disabled {
  opacity: .45;
  cursor: not-allowed;
}

.support-strip {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.support-strip a {
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
}

.result {
  margin-top: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(31,41,55,.92);
}

.result-label {
  margin: 0;
  color: var(--teal);
  font-weight: 900;
}

.result strong {
  display: block;
  margin: 4px 0;
  font-size: 2.5rem;
}

#viewportState {
  position: fixed;
  left: -999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

@media (max-width: 720px) {
  .app { padding: 14px; }
  .hero { flex-direction: column; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .station-row { grid-template-columns: repeat(2, 1fr); }
  .belt { grid-template-columns: repeat(2, minmax(128px, 1fr)); }
  .controls { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .app { padding: 10px; }
  .station { min-height: 86px; }
  .belt { grid-template-columns: 1fr; }
  .item { min-height: 84px; }
}