/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0; padding: 0;
  background: #1a1f2b;
  font-family: 'Segoe UI', 'Meiryo', sans-serif;
  overflow: hidden;
  user-select: none;
  /* タッチ操作はcanvasで管理するため無効化 */
  touch-action: none;
  /* iOS safe area 対応 */
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

#three-container {
  position: fixed; inset: 0;
  width: 100vw; height: 100vh;
}

/* ===== UI オーバーレイ ===== */
#ui-overlay {
  position: fixed;
  /* ノッチ・Dynamic Island を避ける */
  top: max(12px, env(safe-area-inset-top));
  right: max(12px, env(safe-area-inset-right));
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 20;
  align-items: flex-end;
}


.ui-btn {
  background: rgba(30, 40, 60, 0.88);
  color: #e8f0ff;
  border: 1px solid rgba(120,160,255,0.35);
  border-radius: 8px;
  padding: 7px 18px;
  font-size: 0.95em;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  white-space: nowrap;
}
.ui-btn:hover  { background: rgba(60,100,200,0.75); transform: scale(1.04); }
.ui-btn:active { transform: scale(0.97); }

#score-display, #moves-display {
  background: rgba(20,28,50,0.80);
  color: #a8c4ff;
  border-radius: 8px;
  padding: 6px 16px;
  font-size: 0.9em;
  border: 1px solid rgba(100,140,255,0.2);
}

/* ===== ガイドボックス ===== */
#guide-box {
  display: none;
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(20, 28, 50, 0.96);
  color: #cde;
  padding: 24px 28px;
  border-radius: 14px;
  font-size: 1em;
  z-index: 30;
  box-shadow: 0 4px 32px #0009;
  max-width: 340px;
  border: 1px solid rgba(120,160,255,0.3);
  line-height: 1.6;
}
#guide-box b { font-size: 1.1em; color: #fff; }
#guide-box ul { margin: 10px 0 0 18px; padding: 0; }
#guide-box.visible { display: block; }

#btn-guide-open {
  position: fixed;
  bottom: max(50px, calc(env(safe-area-inset-bottom) + 50px));
  right: max(12px, env(safe-area-inset-right));
  z-index: 20;
}

@media (orientation: portrait) {
  #btn-guide-open {
    bottom: max(16px, env(safe-area-inset-bottom));
  }
}

/* ===== クリア画面 ===== */
#clear-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  backdrop-filter: blur(4px);
}
#clear-box {
  background: linear-gradient(135deg, #1e2f50, #0d1a32);
  border: 2px solid rgba(120,180,255,0.4);
  border-radius: 20px;
  padding: 48px 56px;
  text-align: center;
  color: #fff;
  box-shadow: 0 8px 48px #0008;
}
#clear-title {
  font-size: 2.8em;
  font-weight: bold;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
#clear-score {
  font-size: 1.2em;
  color: #a8d8ff;
  margin-bottom: 28px;
}

/* ===== バージョンラベル ===== */
#version-label {
  position: fixed;
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  color: rgba(200,220,255,0.55);
  font-size: 0.8em;
  z-index: 10;
  pointer-events: none;
}