:root {
  color-scheme: dark;
  --bg: #07111f;
  --panel: rgba(12, 24, 42, 0.9);
  --line: rgba(255,255,255,.14);
  --text: #f6f8ff;
  --muted: #95a5bf;
  --accent: #69f0ff;
  --accent2: #ff4fd8;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top, #10253c 0%, var(--bg) 58%, #03070e 100%);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overscroll-behavior-x: none;
  overscroll-behavior-y: auto;
}
body { padding: 14px; }
button, select { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.app {
  width: min(760px, 100%);
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.topbar h1 {
  margin: 0;
  letter-spacing: .12em;
  font-size: clamp(24px, 7vw, 38px);
}
.topbar p { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

.panel {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 10px 30px rgba(0,0,0,.22);
  backdrop-filter: blur(10px);
  border-radius: 16px;
}

.settings {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 8px;
  padding: 10px;
  margin-bottom: 10px;
}
.settings label { display: grid; gap: 4px; font-size: 12px; color: var(--muted); }
.table-desc {
  grid-column: 1 / -1;
  margin: 2px 4px 0;
  color: #dce8ff;
  font-size: 12px;
  line-height: 1.5;
  opacity: .86;
}
select, button {
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 12px;
  min-height: 44px;
  background: #13233a;
  color: var(--text);
  font-weight: 800;
}
button { cursor: pointer; }
button:active { transform: translateY(1px) scale(.99); }
.primary {
  background: linear-gradient(135deg, var(--accent), #4085ff);
  color: #04121d;
}
.icon-btn { width: 48px; min-width: 48px; }

.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 8px;
  margin-bottom: 10px;
  text-align: center;
}
.hud span { display: block; color: var(--muted); font-size: 10px; letter-spacing: .08em; }
.hud strong { display: block; margin-top: 3px; font-size: 18px; }

.game-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 720 / 1180;
  border-radius: 22px;
  overflow: hidden;
  border: 2px solid rgba(255,255,255,.18);
  box-shadow: 0 20px 60px rgba(0,0,0,.4), 0 0 28px rgba(105,240,255,.08);
  background: #02060b;
  /* 盤面上を上下スワイプしてもページ位置を調整できるようにする */
  touch-action: pan-y;
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: pan-y;
}

.message {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 10px;
  background: rgba(1,5,10,.64);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
}
.message.visible { opacity: 1; }
.message strong { font-size: clamp(36px, 12vw, 72px); letter-spacing: .08em; }
.message span { color: #d9e8ff; }

/* COMPLETEはゲーム画面を隠しすぎない小さめの達成演出 */
.message.complete-fx {
  background: radial-gradient(circle at center, rgba(255,244,160,.16), rgba(1,5,10,.28) 36%, rgba(1,5,10,.12) 68%, transparent 100%);
  overflow: hidden;
}
.message.complete-fx strong {
  position: relative;
  z-index: 2;
  font-size: clamp(22px, 6.5vw, 40px);
  letter-spacing: .14em;
  text-shadow: 0 0 8px #fff8b0, 0 0 18px #ffe26e, 0 0 32px rgba(255,198,62,.8);
  animation: complete-pop .62s cubic-bezier(.2,.85,.28,1.25) both, complete-glow .32s ease-in-out 2 alternate;
}
.message.complete-fx span {
  position: relative;
  z-index: 2;
  font-size: clamp(12px, 3.2vw, 17px);
  animation: complete-sub .55s ease-out .08s both;
}
.message.complete-fx::before,
.message.complete-fx::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 92px;
  height: 92px;
  border: 4px solid rgba(255,241,132,.86);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(.25);
  opacity: 0;
  pointer-events: none;
}
.message.complete-fx::before { animation: complete-ring .65s ease-out both; }
.message.complete-fx::after { animation: complete-ring .65s ease-out .12s both; }

@keyframes complete-pop {
  0% { transform: scale(.58); opacity: 0; }
  62% { transform: scale(1.12); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes complete-glow {
  from { filter: brightness(1); }
  to { filter: brightness(1.55); }
}
@keyframes complete-sub {
  from { transform: translateY(8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes complete-ring {
  0% { transform: translate(-50%, -50%) scale(.25); opacity: .9; }
  100% { transform: translate(-50%, -50%) scale(4.2); opacity: 0; }
}

.mobile-controls {
  display: grid;
  grid-template-columns: 1fr .82fr 1fr;
  gap: 10px;
  margin-top: 12px;
  position: sticky;
  bottom: 8px;
  z-index: 5;
}
.mobile-controls button {
  min-height: 62px;
  border-radius: 18px;
  box-shadow: 0 10px 20px rgba(0,0,0,.3);
  user-select: none;
  touch-action: manipulation;
}
.flipper-btn { background: linear-gradient(180deg, #283e63, #14253f); }
.launch-btn { background: linear-gradient(180deg, #ffd66b, #f28b32); color: #2d1600; }
.mobile-controls button.active {
  filter: brightness(1.35);
  transform: translateY(2px) scale(.985);
}

.help { padding: 10px 14px; margin-top: 10px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.help p { margin: 2px 0; }

@media (max-width: 560px) {
  body { padding: 8px; }
  .settings { grid-template-columns: 1fr 1fr; }
  .settings label { grid-column: 1 / -1; }
  .hud strong { font-size: 15px; }
  .mobile-controls { gap: 7px; }
  .mobile-controls button { min-height: 58px; font-size: 13px; }
  .help { font-size: 11px; }
}