: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;
}

/* ─── Four-Colour Map ──────────────────────────────────── */
#game { flex-direction: column; gap: 10px; }
.score-val { font-variant-numeric: tabular-nums; }
.fm-grid {
  display: grid; grid-template-columns: repeat(10, 1fr); grid-template-rows: repeat(10, 1fr);
  width: min(94vw, 56vh, 440px); aspect-ratio: 1; flex: 0 0 auto;
  background: #0f0f14; border-radius: 4px; overflow: hidden;
}
.fm-cell {
  margin: 0; padding: 0; min-width: 0; min-height: 0; position: relative;
  background: #2b2b36; border: 0.5px solid #3c3c4a;
  cursor: pointer; -webkit-tap-highlight-color: transparent;
}
/* 지역 경계는 굵게 */
/* 칠하지 않은 칸 위에서도 보이도록 밝은 선 */
.fm-cell.bt { border-top: 2.5px solid #d6d6e2; } .fm-cell.bb { border-bottom: 2.5px solid #d6d6e2; }
.fm-cell.bl { border-left: 2.5px solid #d6d6e2; } .fm-cell.br { border-right: 2.5px solid #d6d6e2; }
/* 색 + 무늬 (민무늬 · 빗금 · 점 · 격자) — 색약이어도 구분되게 */
.fc0 { background-color: #e0605a; }
.fc1 { background-color: #efc44c; background-image: repeating-linear-gradient(45deg, rgba(0,0,0,0.16) 0 3px, transparent 3px 8px); }
.fc2 { background-color: #4f9fe0; background-image: radial-gradient(rgba(0,0,0,0.22) 1.6px, transparent 2px); background-size: 8px 8px; }
.fc3 { background-color: #5bbf78; background-image: linear-gradient(rgba(0,0,0,0.16) 1.5px, transparent 1.5px), linear-gradient(90deg, rgba(0,0,0,0.16) 1.5px, transparent 1.5px); background-size: 8px 8px; }
.fm-cell.given { filter: saturate(0.85) brightness(0.86); cursor: default; }
.fm-cell.pin::after { content: ""; position: absolute; left: 50%; top: 50%; width: 9px; height: 9px; margin: -4.5px 0 0 -4.5px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 2px #111; }
.fm-cell.bad { box-shadow: inset 0 0 0 2px #ff2d55; }
.fm-msg { margin: 0; min-height: 18px; text-align: center; font-size: 14px; font-weight: 700; color: #c4c4c4; }
.fm-msg.warn { color: #ff8a9a; }
.fm-pad { display: grid; grid-template-columns: repeat(5, 1fr) 1.5fr; gap: 7px; width: min(92vw, 420px); }
.fm-key { min-height: 48px; border-radius: 12px; border: 2px solid #34343f; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.fm-key.on { box-shadow: 0 0 0 3px #fff; border-color: #0a0a0a; }
.fm-erase { background: #1d1d26; color: #d0d0d0; font-size: 18px; font-weight: 800; }
.fm-undo { font: inherit; font-size: 13px; font-weight: 800; color: #dbe3ee; background: #222b36; border: 1px solid rgba(255,255,255,0.18); border-radius: 12px; min-height: 48px; cursor: pointer; }
.fm-undo:disabled { opacity: 0.4; cursor: default; }
.fm-grid.solved-flash { box-shadow: 0 0 0 3px #3ddc84; }
.overlay-sub { margin: -4px 0 4px; font-size: 14px; font-weight: 600; color: #a0a0a0; }
.overlay-howto { margin: 0 0 4px; font-size: 13px; line-height: 1.45; color: #b8b8b8; }
.overlay-card .start-btn { background: #4f9eff; border-color: #4f9eff; color: #0a0a0a; }