:root {
  --bg-top: #5aa6d7;
  --bg-bottom: #dff0c2;
  --panel: rgba(22, 24, 20, 0.62);
  --panel-border: rgba(255, 255, 255, 0.18);
  --text: #f7f7ef;
  --text-muted: rgba(247, 247, 239, 0.84);
  --glow: rgba(255, 236, 178, 0.34);
  --wood-hi: #9a7a4d;
  --wood-mid: #6f5636;
  --wood-lo: #3f2f1d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -26%, rgba(255, 255, 255, 0.48), transparent 56%),
    radial-gradient(circle at 15% 120%, rgba(70, 112, 78, 0.24), transparent 44%),
    radial-gradient(circle at 85% 120%, rgba(70, 112, 78, 0.24), transparent 44%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  display: flex;
  justify-content: center;
  padding: 0.5rem;
}

.app {
  width: min(100%, 1600px);
  display: grid;
  gap: 0.7rem;
}

.hud {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 0.6rem 0.9rem;
  backdrop-filter: blur(7px);
  box-shadow:
    0 10px 26px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.center-info {
  text-align: center;
  min-width: 8rem;
}

.timer {
  margin: 0;
  font-size: 1.46rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-shadow: 0 0 12px rgba(0, 0, 0, 0.25);
}

.status {
  margin: 0;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.arena-wrap {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  height: min(78vh, 900px);
  box-shadow:
    0 18px 44px rgba(0, 0, 0, 0.26),
    inset 0 0 0 1px rgba(255, 255, 255, 0.06),
    inset 0 0 0 8px rgba(0, 0, 0, 0.14);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.07), transparent 24%),
    radial-gradient(circle at 50% 0, var(--glow), transparent 45%),
    linear-gradient(180deg, rgba(154, 122, 77, 0.3), rgba(63, 47, 29, 0.3));
}

#arena {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.controls {
  margin: 0;
  padding: 0.58rem 0.76rem;
  border-radius: 14px;
  background: rgba(28, 35, 26, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.91rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.14);
}

.controls p {
  margin: 0;
}

.sound-btn {
  border: 0;
  border-radius: 12px;
  padding: 0.53rem 0.78rem;
  color: #f7f8ed;
  font-weight: 700;
  background: linear-gradient(180deg, var(--wood-hi), var(--wood-mid) 55%, var(--wood-lo));
  box-shadow:
    0 6px 12px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.sound-btn[data-active="true"] {
  background: linear-gradient(180deg, #67965a, #3f6533);
}

.touch-controls {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.touch-controls button {
  border: 0;
  border-radius: 11px;
  padding: 0.7rem 0.45rem;
  font-weight: 700;
  color: #f8f8f0;
  background: linear-gradient(180deg, #5e8753, #334b2a);
  box-shadow:
    0 6px 14px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.touch-controls button:active {
  transform: translateY(1px);
}

@media (max-width: 900px) {
  .touch-controls {
    display: grid;
  }

  .controls {
    font-size: 0.84rem;
    flex-direction: column;
    align-items: stretch;
  }

  .timer {
    font-size: 1.2rem;
  }
}