:root {
  --bg-a: #cbe9ff;
  --bg-b: #f8fdff;
  --frame: #1f2a33;
  --text: #0f1a23;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 50% 20%, var(--bg-b), var(--bg-a));
}

.app {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  padding: 8px;
  overflow: hidden;
}

#game {
  display: block;
  width: auto;
  height: auto;
  border: 2px solid var(--frame);
  border-radius: 14px;
  background: #daf0ff;
  touch-action: none;
}

.hud {
  display: none;
  position: fixed;
  top: max(10px, env(safe-area-inset-top));
  left: 0;
  right: 0;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  pointer-events: none;
  z-index: 30;
}

.speed-step-counter {
  position: fixed;
  top: max(10px, env(safe-area-inset-top));
  right: max(10px, env(safe-area-inset-right));
  padding: 6px 10px;
  border: 1px solid rgba(18, 36, 48, 0.35);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  color: #102030;
  font: 700 13px/1.1 "Trebuchet MS", "Segoe UI", sans-serif;
  letter-spacing: 0.02em;
  text-align: right;
  line-height: 1.3;
  pointer-events: none;
  z-index: 31;
}

.debug-log-panel {
  position: fixed;
  right: max(8px, env(safe-area-inset-right));
  bottom: max(8px, env(safe-area-inset-bottom));
  width: min(520px, 58vw);
  max-height: min(42vh, 360px);
  margin: 0;
  padding: 8px;
  overflow: auto;
  border: 1px solid rgba(18, 36, 48, 0.45);
  border-radius: 8px;
  background: rgba(8, 20, 28, 0.78);
  color: #b8ffcf;
  font: 11px/1.35 monospace;
  white-space: pre-wrap;
  pointer-events: none;
  z-index: 20;
}

.debug-controls {
  position: fixed;
  left: max(8px, env(safe-area-inset-left));
  bottom: max(8px, env(safe-area-inset-bottom));
  display: flex;
  gap: 8px;
  z-index: 32;
}

.debug-controls button {
  border: 1px solid rgba(18, 36, 48, 0.4);
  border-radius: 8px;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.88);
  color: #102030;
  font: 12px/1.1 "Trebuchet MS", "Segoe UI", sans-serif;
  cursor: pointer;
}

.audio-diag-btn {
  position: fixed;
  left: max(8px, env(safe-area-inset-left));
  bottom: max(8px, env(safe-area-inset-bottom));
  z-index: 2147483647;
  border: 1px solid rgba(18, 36, 48, 0.4);
  border-radius: 8px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.9);
  color: #102030;
  font: 700 12px/1 "Trebuchet MS", "Segoe UI", sans-serif;
  pointer-events: auto;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}

.audio-diag-modal {
  position: fixed;
  inset: 0;
  z-index: 2147483646;
  background: rgba(4, 12, 18, 0.6);
  display: grid;
  place-items: center;
  padding: 12px;
  pointer-events: auto;
}

.audio-diag-card {
  width: min(980px, 96vw);
  max-height: 90vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 8px;
  border: 1px solid rgba(18, 36, 48, 0.35);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.97);
  padding: 10px;
}

.audio-diag-head {
  font: 700 14px/1.2 "Trebuchet MS", "Segoe UI", sans-serif;
  color: #102030;
}

.audio-diag-text {
  width: 100%;
  min-height: 48vh;
  resize: vertical;
  border: 1px solid rgba(18, 36, 48, 0.3);
  border-radius: 8px;
  padding: 8px;
  font: 12px/1.35 monospace;
  color: #0e1a22;
  background: #f7fbff;
}

.audio-diag-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.audio-diag-actions button {
  border: 1px solid rgba(18, 36, 48, 0.4);
  border-radius: 8px;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.95);
  color: #102030;
  font: 12px/1.1 "Trebuchet MS", "Segoe UI", sans-serif;
}

@media (max-width: 900px) {
  .debug-log-panel {
    width: calc(100vw - 16px);
    max-height: 34vh;
    left: 8px;
    right: 8px;
  }

  .debug-controls {
    bottom: max(10px, env(safe-area-inset-bottom));
  }
}

@media (pointer: coarse) {
  html,
  body {
    background: #daf0ff;
  }

  .app {
    padding: 0;
  }

  #game {
    width: auto;
    height: auto;
    border: none;
    border-radius: 0;
  }
}