: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;
}

/* ─── Kropki ───────────────────────────────────────────── */
#game { flex-direction: column; gap: 12px; }
.score-val { font-variant-numeric: tabular-nums; }

/* 점 자리를 위해 칸 사이에 좁은 트랙(--gap)을 둔 (2N-1) 그리드. */
.kp-grid {
  --gap: clamp(12px, 3.6vw, 18px);
  display: grid;
  width: min(92vw, 50vh, 420px);
  aspect-ratio: 1;
  flex: 0 0 auto;
}
.kp-cell {
  margin: 0; padding: 0;
  background: #161620;
  color: #f5f5f5;
  border: 1.5px solid #3a3a48;
  border-radius: 7px;
  font: inherit;
  font-size: clamp(18px, 6vw, 28px);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  min-width: 0; min-height: 0;
  overflow: hidden;
}
.kp-cell.fixed { background: #20202c; color: #ffd166; border-color: #4a4a5c; }
.kp-cell.same { background: #1f2a3a; }
.kp-cell.sel { border-color: #4f9eff; box-shadow: inset 0 0 0 2px #4f9eff; background: #1b2638; }
.kp-cell.bad { background: #4a2230; border-color: #7a2f44; }
.kp-cell.bad:not(.fixed) { color: #ff8a8a; }
.kp-marks { display: grid; grid-template-columns: repeat(3, 1fr); width: 100%; height: 100%; padding: 2px; box-sizing: border-box; }
.kp-marks i { font-style: normal; font-size: clamp(8px, 2.4vw, 11px); font-weight: 700; color: #9fb2cc; display: flex; align-items: center; justify-content: center; line-height: 1; }

/* 흰 점 = 흰 원, 검은 점 = 검은 원 + 밝은 테두리(어두운 배경에서 보이게) — 명도로 구분 */
.kp-dot { justify-self: center; align-self: center; width: clamp(10px, 3vw, 14px); height: clamp(10px, 3vw, 14px); border-radius: 50%; pointer-events: none; z-index: 1; box-sizing: border-box; }
.kp-dot.white { background: #f5f5f5; border: 2px solid #f5f5f5; }
.kp-dot.black { background: #000; border: 2px solid #c8c8d4; }
.kp-dot.bad { box-shadow: 0 0 0 3px #ff4d6a; }

.kp-pad { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; width: min(92vw, 420px); }
.kp-key {
  font: inherit; font-size: 20px; font-weight: 800;
  color: #f5f5f5; background: #1d1d26; border: 1px solid #34343f; border-radius: 10px;
  min-height: 46px; cursor: pointer; -webkit-tap-highlight-color: transparent;
}
.kp-key:active { background: #2a2a36; }
.kp-erase { font-size: 18px; color: #c8c8c8; }
.kp-notes {
  font: inherit; font-size: 14px; font-weight: 700;
  color: #d8d8d8; background: transparent; border: 1px solid #34343f; border-radius: 999px;
  padding: 8px 18px; min-height: 40px; cursor: pointer;
}
.kp-notes.on { background: #ffd166; border-color: #ffd166; color: #141414; }

.kp-grid.solved-flash .kp-cell { background: #1d3a2a; border-color: #2f6b48; }
.kp-grid.solved-flash .kp-cell:not(.fixed) { color: #6ee7a0; }

.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; }