: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 | TIME | 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; }

/* 시간 표시 */
.time-val { display: inline; font-size: 22px; font-weight: 800; font-variant-numeric: tabular-nums; }
.time-unit { font-size: 13px; font-weight: 700; color: #a0a0a0; }
.score-box.low .time-val,
.score-box.low .time-unit { color: #ff5d5d; }

/* 게임 영역 — 가운데 정렬된 격자 */
#game {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

/* NxN 격자 (바둑판 느낌의 어두운 판) */
.yy {
  display: grid;
  grid-template-columns: repeat(var(--n, 6), 1fr);
  gap: 5px;
  width: min(92vw, 78vh, 440px);
  aspect-ratio: 1;
  padding: 8px;
  background: #14141c;
  border: 1px solid #24242e;
  border-radius: 14px;
}

.yy-cell {
  border: none;
  margin: 0;
  padding: 0;
  border-radius: 9px;
  background: #21212c;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 돌 — 원형. 비어있으면 숨김, v1=어두운 돌, v2=밝은 돌 */
.yy-stone {
  width: 78%;
  height: 78%;
  border-radius: 50%;
  transform: scale(0);
  transition: transform 0.12s ease;
}
.yy-cell.v1 .yy-stone,
.yy-cell.v2 .yy-stone { transform: scale(1); }

.yy-cell.v1 .yy-stone {
  background: radial-gradient(circle at 35% 30%, #3a3a46, #101018 70%);
  box-shadow: inset 0 -2px 4px rgba(0, 0, 0, 0.55), 0 1px 2px rgba(0, 0, 0, 0.5);
}
.yy-cell.v2 .yy-stone {
  background: radial-gradient(circle at 35% 30%, #ffffff, #c7ccd6 72%);
  box-shadow: inset 0 -2px 4px rgba(0, 0, 0, 0.28), 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* 단서(고정) 돌 — 가운데 작은 점으로 "잠김" 표시 */
.yy-cell.given .yy-stone::after {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  width: 20%; height: 20%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
}
.yy-cell.given.v1 .yy-stone::after { background: rgba(255, 255, 255, 0.32); }
.yy-cell.given.v2 .yy-stone::after { background: rgba(0, 0, 0, 0.32); }
.yy-cell.given { cursor: default; }

/* 규칙 위반 강조 (단색 2x2 · 바람개비 · 끊긴 그룹) */
.yy-cell.bad {
  box-shadow: inset 0 0 0 3px #ff4d4d;
  background: #2e1a1f;
}

.yy.solved-flash .yy-cell {
  box-shadow: inset 0 0 0 3px rgba(46, 194, 126, 0.75);
}

.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; }

/* 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 / 준비 화면) */
.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;
}