:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
  touch-action: manipulation;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100dvh;
  overflow: hidden;
  background: #0a0a0a;
  color: #f5f5f5;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
  overscroll-behavior: none;
}

main {
  height: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  padding:
    max(60px, env(safe-area-inset-top))
    16px
    max(20px, env(safe-area-inset-bottom));
  gap: 16px;
}

/* 점수바: SCORE | BEST | New 버튼 */
.score-bar {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.score-box {
  flex: 1;
  background: #161616;
  border: 1px solid #2a2a2a;
  border-radius: 12px;
  padding: 8px 12px;
  text-align: center;
  min-width: 0;
}

.score-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #a0a0a0;
}

.score-val,
.best-val {
  display: block;
  font-size: 22px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: #f5f5f5;
  margin-top: 2px;
  line-height: 1.1;
}

.new-btn {
  flex: 0 0 auto;
  font: inherit;
  color: #fff;
  background: #4f9eff;
  border: none;
  border-radius: 12px;
  padding: 0 18px;
  min-height: 56px;
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
  -webkit-tap-highlight-color: transparent;
}

.new-btn:active { background: #3d8ae8; }

/* 게임 영역 — 보드/캠버스/그리드 등을 여기에 */
#game {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;   /* 작은 폰에서 아래 조작 요소가 화면 밖으로 밀리지 않게 */
}

/* 좌상단 ← 홈, 우상단 🏆 명예의 전당 — 모든 게임 공통 chrome */
.home-link,
.hof-link {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  z-index: 10;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  text-decoration: none;
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: background 0.15s ease;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.home-link { left:  max(12px, env(safe-area-inset-left)); }
.hof-link  { right: max(12px, env(safe-area-inset-right)); }

@media (hover: hover) {
  .home-link:hover,
  .hof-link:hover {
    background: rgba(0, 0, 0, 0.55);
  }
}

/* 오버레이 (게임 종료 / 완료 시 점수 + 저장 버튼) */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  padding: 20px;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.overlay[hidden] { display: none; }

.overlay-card {
  background: #161616;
  border: 1px solid #2a2a2a;
  border-radius: 18px;
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
  min-width: 240px;
  max-width: 320px;
  width: 100%;
}

.overlay-card h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.overlay-score {
  margin: 0;
  font-size: 56px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
  line-height: 1;
}

.overlay-card button {
  font: inherit;
  color: #fff;
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  padding: 12px 20px;
  min-height: 44px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  width: 100%;
  -webkit-tap-highlight-color: transparent;
}

.overlay-card button:active {
  background: rgba(255, 255, 255, 0.18);
}

.overlay-card .save-btn {
  background: #4f9eff;
  border-color: #4f9eff;
}

.overlay-card .save-btn:active {
  background: #3d8ae8;
}

/* ─── Northcott's Game ─────────────────────────────────── */
#game { flex-direction: column; gap: 12px; }
.nc-legend { display: flex; justify-content: center; gap: 18px; font-size: 14px; font-weight: 700; color: #d8d8d8; }
.nc-key { display: inline-flex; align-items: center; gap: 7px; }
.nc-key i { display: inline-block; width: 16px; height: 16px; }
/* 내 말은 둥근 원, AI 말은 마름모 — 색만으로 구분하지 않는다(색약). */
.nc-key.you i { border-radius: 50%; background: #ff7a59; }
.nc-key.ai i { background: #46b7ff; transform: rotate(45deg) scale(0.85); border-radius: 3px; }
.nc-key.gap b { display: inline-block; min-width: 20px; padding: 1px 5px; border-radius: 999px; background: #222; text-align: center; font-size: 12px; }

.nc-board {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  touch-action: none;
  flex: 0 1 auto;
  min-height: 0;
}
.nc-row { display: grid; grid-template-columns: repeat(8, 1fr) 30px; gap: 3px; align-items: center; }
.nc-cell {
  position: relative;
  aspect-ratio: 1;
  max-height: 52px;
  border-radius: 8px;
  background: #1a1a1a;
  border: 1px solid #262626;
  outline: none;
  cursor: pointer;
}
.nc-cell.between { background: #22262c; border-color: #343b45; }
.nc-cell.beyond { background: #0f0f0f; border-color: #191919; cursor: default; }
.nc-cell.you::after, .nc-cell.ai::after, .nc-cell.ghost::after {
  content: ""; position: absolute; inset: 14%;
}
.nc-cell.you::after { border-radius: 50%; background: #ff7a59; box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.25); }
.nc-cell.ai::after { inset: 20%; border-radius: 4px; background: #46b7ff; transform: rotate(45deg); box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.25); }
.nc-cell.ai.last::after { outline: 3px solid #e8f6ff; outline-offset: 2px; }
.nc-cell.trail { background: repeating-linear-gradient(90deg, #1d2a36 0 4px, #1a1a1a 4px 8px); }
.nc-cell.ghost::after { border-radius: 50%; background: rgba(255, 122, 89, 0.35); border: 2px dashed #ff7a59; }
.nc-cell.you.ghost::after { background: #ff7a59; }
.nc-cell:focus-visible { box-shadow: inset 0 0 0 2px #fff; }
.nc-gap { text-align: center; font-size: 14px; font-weight: 800; font-variant-numeric: tabular-nums; color: #f5f5f5; }
.nc-row.closed .nc-gap { color: #8a8a8a; }
.nc-board.won { animation: nc-pulse 0.5s ease-in-out 2; }
.nc-board.lost { animation: nc-pulse 0.5s ease-in-out 2; }
@keyframes nc-pulse { 50% { opacity: 0.55; } }

.nc-msg { margin: 0; min-height: 20px; text-align: center; font-size: 14px; color: #c4c4c4; }
.nc-reason { margin: 0; font-size: 14px; color: #c4c4c4; }
.overlay-score .unit { font-size: 20px; font-weight: 600; color: #c0c0c0; margin-left: 6px; letter-spacing: 0; }
.overlay-card .next-overlay-btn { background: #4f9eff; border-color: #4f9eff; color: #0a0a0a; }
.overlay-card .next-overlay-btn:active { background: #3d8ae8; }