:root {
  color-scheme: dark;
  --bg: #10151e;
  --card: rgba(13, 21, 31, 0.82);
  --line: rgba(255, 255, 255, 0.12);
  --text: #f6f7fb;
  --muted: #b4bfd3;
  --hero: #ff7f5c;
  --hero2: #ffd166;
  --accent: #78f3c5;
  --warning: #ffe38a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(255, 127, 92, 0.24), transparent 28%),
    linear-gradient(180deg, #17273a 0%, #0d1219 55%, #090d13 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0 15%, rgba(255,255,255,0.03) 15% 16%, transparent 16% 32%, rgba(255,255,255,0.03) 32% 33%, transparent 33% 49%, rgba(255,255,255,0.03) 49% 50%, transparent 50% 66%, rgba(255,255,255,0.03) 66% 67%, transparent 67% 83%, rgba(255,255,255,0.03) 83% 84%, transparent 84%);
  opacity: 0.6;
}

.app {
  width: min(100%, 820px);
  margin: 0 auto;
  padding: 20px 16px 32px;
}

.hero, .stats, .panel, .move-pad, .support-strip, .result {
  backdrop-filter: blur(12px);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  padding: 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--warning);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 0.95;
}

.subtitle {
  margin: 12px 0 0;
  max-width: 54ch;
  color: var(--muted);
  line-height: 1.6;
}

.hub-link, .support-strip a, .controls button, .move-pad .pad, .result button {
  transition: transform 0.16s ease, opacity 0.16s ease, border-color 0.16s ease;
}

.hub-link, .support-strip a {
  align-self: start;
  color: var(--text);
  text-decoration: none;
  border: 1px solid rgba(120, 243, 197, 0.35);
  background: rgba(120, 243, 197, 0.1);
  padding: 10px 14px;
  border-radius: 999px;
}

.stats {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 16px;
}

.stats div {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 18px;
  padding: 12px;
  text-align: center;
}

.stats span {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.stats strong {
  display: block;
  margin-top: 6px;
  font-size: 1.35rem;
}

.panel {
  margin-top: 16px;
  padding: 16px 18px;
}

.message { margin: 0; line-height: 1.5; }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.legend span {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.chip {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  display: inline-block;
}

.chip.hero { background: linear-gradient(135deg, var(--hero), var(--hero2)); }
.chip.rail { background: #7cb6ff; }
.chip.block { background: #9aa3b2; }

.board-wrap {
  margin-top: 18px;
  position: relative;
}

.exit-sign {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  padding: 10px 8px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.16);
  background: linear-gradient(180deg, rgba(120,243,197,0.22), rgba(120,243,197,0.08));
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.board-shell {
  border-radius: 28px;
  padding: 18px;
  background:
    linear-gradient(145deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02)),
    linear-gradient(180deg, rgba(19, 30, 45, 0.95), rgba(9, 14, 20, 0.95));
  border: 1px solid rgba(255,255,255,0.1);
}

.board {
  position: relative;
  width: min(100%, 540px);
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  border-radius: 24px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255,255,255,0.05) 0 1px, transparent 1px calc(16.666% - 1px), rgba(255,255,255,0.05) calc(16.666% - 1px) 16.666%),
    linear-gradient(180deg, rgba(255,255,255,0.05) 0 1px, transparent 1px calc(16.666% - 1px), rgba(255,255,255,0.05) calc(16.666% - 1px) 16.666%),
    linear-gradient(180deg, #33485d 0%, #253646 100%);
}

.board::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 0 33.33%, rgba(124, 182, 255, 0.14) 33.33% 50%, transparent 50% 100%);
}

.vehicle {
  position: absolute;
  border: none;
  border-radius: 18px;
  color: #091018;
  font-weight: 800;
  letter-spacing: 0.05em;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.36), 0 10px 18px rgba(0,0,0,0.24);
  padding: 0;
  overflow: hidden;
  cursor: pointer;
}

.vehicle::before, .vehicle::after {
  content: "";
  position: absolute;
  width: 16%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(8, 11, 16, 0.9);
  bottom: 6%;
}

.vehicle::before { left: 10%; }
.vehicle::after { right: 10%; }

.vehicle.selected {
  outline: 3px solid #fff0bb;
  transform: translateY(-2px);
}

.vehicle.hero {
  color: #351005;
  background: linear-gradient(135deg, var(--hero), var(--hero2));
}

.vehicle-label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 10px;
  text-align: center;
  font-size: clamp(0.72rem, 1.8vw, 0.95rem);
}

.controls {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

button { font: inherit; }

.ghost, .pad, .primary {
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  min-height: 54px;
}

.primary, .pad.accent {
  color: #051116;
  background: linear-gradient(135deg, var(--accent), #c6ffde);
  border-color: rgba(198,255,222,0.5);
}

.move-pad {
  margin-top: 16px;
  padding: 14px;
  display: grid;
  gap: 8px;
  justify-items: center;
}

.pad { min-width: 72px; padding: 0 14px; }

.pad-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

#selectLabel {
  min-width: min(48vw, 280px);
  cursor: default;
}

.support-strip {
  margin-top: 16px;
  padding: 14px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.result {
  margin-top: 16px;
  padding: 18px;
  text-align: center;
}

.result-label {
  margin: 0;
  color: var(--warning);
  letter-spacing: 0.15em;
}

.result strong {
  display: block;
  font-size: 2.4rem;
  margin-top: 8px;
}

.result p { color: var(--muted); }

button:hover, button:focus-visible, .hub-link:hover, .support-strip a:hover { transform: translateY(-1px); }
button:active { transform: translateY(1px); }

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

@media (max-width: 640px) {
  .app { padding: 14px 12px 24px; }
  .hero { flex-direction: column; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .controls { grid-template-columns: repeat(2, 1fr); }
  .board-shell { padding: 12px; }
  .vehicle { border-radius: 14px; }
  .exit-sign { right: -2px; font-size: 0.8rem; }
}