:root {
  --bg: #ecf4ff;
  --panel: #fdfdfd;
  --ink: #16212f;
  --muted: #5a6a7e;
  --lane: #d5e5ff;
  --lane-mid: #8cb4ff;
  --accent: #1f5dff;
  --danger: #c53030;
  --ok: #0f9d58;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 16px;
  display: grid;
  place-items: center;
  font-family: "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 10%, #ffffff 0%, transparent 35%),
    linear-gradient(165deg, #d2e7ff 0%, #f9fcff 45%, #ffd9b8 100%);
}

.app {
  width: min(100%, 520px);
  background: var(--panel);
  border-radius: 22px;
  padding: 18px;
  box-shadow: 0 22px 56px rgba(16, 48, 99, 0.22);
  position: relative;
}

.eyebrow {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 6px 0 2px;
  font-size: clamp(1.7rem, 6vw, 2.6rem);
}

.lead {
  margin: 0;
  color: var(--muted);
}

.hud {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.hud p {
  margin: 0;
  border-radius: 12px;
  padding: 8px;
  background: #f4f8ff;
  display: grid;
  gap: 4px;
}

.hud span {
  font-size: 0.75rem;
  color: var(--muted);
}

.hud strong {
  font-size: 1.12rem;
  transition: transform 120ms ease;
}

.hud strong.state-feedback {
  transform: scale(1.08);
}

#lane-label.lane-feedback {
  transform: scale(1.08);
}

#lane-label.lane-feedback-blocked {
  color: #9f1239;
  transform: scale(1.06);
}

.arena-wrap {
  margin-top: 12px;
  border-radius: 16px;
  overflow: hidden;
  border: 2px solid #d5e5ff;
}

.arena {
  position: relative;
  height: 420px;
  background: linear-gradient(180deg, #f6fbff 0%, #dfecff 100%);
}

.lane-grid {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
}

.lane-grid span {
  border-left: 1px solid rgba(22, 33, 47, 0.12);
}

.lane-grid span:first-child {
  border-left: none;
}

.player,
.hazard {
  position: absolute;
  width: 56px;
  height: 56px;
  left: 50%;
  margin-left: -28px;
  border-radius: 14px;
}

.player {
  bottom: 16px;
  background: linear-gradient(145deg, #2f6dff, #184fd3);
  box-shadow: 0 10px 24px rgba(21, 73, 204, 0.44);
}

.hazard {
  top: -60px;
  background: linear-gradient(145deg, #ff8356, #e14828);
  box-shadow: 0 8px 20px rgba(217, 64, 20, 0.35);
}

.controls {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

button {
  border: none;
  border-radius: 999px;
  padding: 12px 14px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:active {
  transform: translateY(1px);
}

.hint {
  margin: 10px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}

.run-cue {
  margin: 8px 0 0;
  text-align: center;
  font-size: 0.85rem;
  color: #0f5132;
  background: #d1fae5;
  border: 1px solid #10b981;
  border-radius: 999px;
  padding: 6px 10px;
  animation: cue-pop 220ms ease-out;
}

@keyframes cue-pop {
  0% {
    transform: translateY(4px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(16, 32, 56, 0.74);
  border-radius: 22px;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 10px;
  padding: 14px;
}

.result-title {
  margin: 0;
  color: #fff;
  font-size: 1.65rem;
}

.result-reason {
  margin: 0;
  color: #edf3ff;
}

.overlay button {
  background: #fff;
  color: var(--ink);
}

.repo-link-wrap {
  margin: 12px 0 0;
  text-align: center;
}

.repo-link {
  color: #1f5dff;
  text-underline-offset: 3px;
  font-weight: 600;
}

.state-ready {
  color: #a36200;
}

.state-live {
  color: var(--ok);
}

.state-over {
  color: var(--danger);
}

@media (max-width: 480px) {
  .arena {
    height: 360px;
  }

  .player,
  .hazard {
    width: 48px;
    height: 48px;
    margin-left: -24px;
  }
}