:root {
  --bg: #050816;
  --panel: #0f1630;
  --line: #233670;
  --text: #e6ebff;
  --accent: #ffd84d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% 10%, #142451 0, transparent 35%),
    radial-gradient(circle at 80% 90%, #203e8a 0, transparent 40%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.app {
  width: min(94vw, 760px);
}

.hud {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.hud h1 {
  margin: 0.5rem 0;
  font-size: clamp(1.1rem, 4vw, 1.6rem);
  letter-spacing: 0.06em;
}

.stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.game-wrap {
  position: relative;
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 8px;
  background: linear-gradient(180deg, rgba(19, 30, 65, 0.8), rgba(8, 13, 28, 0.9));
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.45);
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}

.message {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 1rem;
  font-size: clamp(1rem, 4vw, 1.5rem);
  font-weight: 700;
  color: var(--accent);
  background: rgba(2, 5, 17, 0.6);
}

.hidden {
  display: none;
}

.help {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  opacity: 0.85;
}

.touch-controls {
  display: none;
  grid-template-columns: repeat(3, minmax(0, 88px));
  grid-template-areas:
    ". up ."
    "left pause right"
    ". down .";
  justify-content: center;
  gap: 0.65rem;
  margin-top: 1rem;
}

.control-btn {
  border: 1px solid #36539d;
  border-radius: 999px;
  padding: 0.85rem 1rem;
  background: linear-gradient(180deg, rgba(39, 63, 130, 0.92), rgba(14, 22, 48, 0.98));
  color: var(--text);
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.control-up {
  grid-area: up;
}

.control-left {
  grid-area: left;
}

.control-pause {
  grid-area: pause;
}

.control-right {
  grid-area: right;
}

.control-down {
  grid-area: down;
}

@media (max-width: 640px) {
  .touch-controls {
    display: grid;
  }

  .help {
    flex-direction: column;
    gap: 0.2rem;
  }
}