:root {
  color-scheme: dark;
  --bg: #08111f;
  --panel: rgba(15, 23, 42, 0.88);
  --panel-border: rgba(148, 163, 184, 0.2);
  --text: #e5eefc;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --danger: #fb7185;
  --gold: #fde047;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.18), transparent 30%),
    linear-gradient(180deg, #020617, var(--bg));
}

.app {
  width: min(1200px, 100%);
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 20px;
  padding: 24px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(10px);
}

.panel-left {
  padding: 24px;
}

.panel-left h1 {
  margin: 0;
  font-size: 2.2rem;
}

.tagline {
  color: var(--muted);
  margin-top: 8px;
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.stat {
  padding: 14px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.15);
}

.label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.stat strong {
  font-size: 1.6rem;
}

.actions {
  margin-top: 18px;
}

button {
  border: 0;
  border-radius: 16px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 700;
  color: #03111d;
  background: linear-gradient(135deg, #7dd3fc, #38bdf8);
  cursor: pointer;
  transition: transform 120ms ease, filter 120ms ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
}

.instructions {
  margin-top: 26px;
}

.instructions h2 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.instructions ul {
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.6;
}

.message {
  margin-top: 24px;
  padding: 14px;
  border-radius: 16px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.14);
}

.panel-right {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.game-area {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  min-height: 420px;
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid rgba(148, 163, 184, 0.12);
  background:
    linear-gradient(rgba(148, 163, 184, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.08) 1px, transparent 1px),
    radial-gradient(circle at center, rgba(56, 189, 248, 0.08), transparent 45%),
    #020617;
  background-size: 40px 40px, 40px 40px, auto, auto;
}

.player,
.collectible,
.enemy {
  position: absolute;
  border-radius: 999px;
  transform: translate(-50%, -50%);
}

.player {
  width: 28px;
  height: 28px;
  background: radial-gradient(circle at 35% 35%, #ffffff, #7dd3fc 45%, #0284c7 80%);
  box-shadow: 0 0 22px rgba(56, 189, 248, 0.8);
}

.collectible {
  width: 22px;
  height: 22px;
  background: radial-gradient(circle at center, #fff7ae, var(--gold));
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 92%, 50% 70%, 21% 92%, 32% 57%, 2% 35%, 39% 35%);
  box-shadow: 0 0 20px rgba(253, 224, 71, 0.65);
}

.enemy {
  width: 24px;
  height: 24px;
  background: radial-gradient(circle at 35% 35%, #fecdd3, var(--danger) 55%, #be123c 85%);
  box-shadow: 0 0 18px rgba(251, 113, 133, 0.55);
}

.touch-controls {
  display: none;
  align-items: center;
  flex-direction: column;
  gap: 10px;
}

.touch-row {
  display: flex;
  gap: 10px;
}

.touch-controls button {
  min-width: 64px;
  min-height: 52px;
  border-radius: 18px;
}

@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
  }

  .game-area {
    min-height: 340px;
  }

  .touch-controls {
    display: flex;
  }
}