: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;
}

/* ─── Six Dots ─────────────────────────────────────────── */
.score-label { color: #a0a0a0; }
#game { flex-direction: column; gap: 10px; }
.sd-legend { display: flex; justify-content: center; gap: 22px; font-size: 14px; font-weight: 700; color: #d8d8d8; }
.sd-key { display: inline-flex; align-items: center; gap: 8px; }
.sd-key i { display: inline-block; width: 28px; height: 0; border-top: 5px solid; border-radius: 3px; }
.sd-key.you i { border-color: #ff7a59; }
/* AI 선은 색 + 점선으로 구분 — 색만으로 구분하지 않는다(색약). */
.sd-key.ai i { border-color: #46b7ff; border-top-style: dashed; }

.sd-board { width: 100%; max-width: 360px; max-height: 100%; aspect-ratio: 1; flex: 0 1 auto; min-height: 0; touch-action: none; }
.sd-line { stroke-linecap: round; transition: stroke 0.15s ease; }
.sd-line.free { stroke: #3a3a3a; stroke-width: 2; stroke-dasharray: 2 7; }
.sd-line.you { stroke: #ff7a59; stroke-width: 7; }
.sd-line.ai { stroke: #46b7ff; stroke-width: 7; stroke-dasharray: 14 9; }
.sd-line.last { filter: drop-shadow(0 0 5px rgba(70, 183, 255, 0.9)); }
.sd-line.lost { stroke-width: 10; animation: sd-blink 0.45s ease-in-out 3; }
@keyframes sd-blink { 50% { opacity: 0.25; } }

.sd-dot { cursor: pointer; outline: none; }
.sd-dot .hit { fill: transparent; }
.sd-dot .ring { fill: none; stroke: transparent; stroke-width: 3; }
.sd-dot .core { fill: #f5f5f5; }
.sd-dot .mark { stroke: transparent; stroke-width: 3; stroke-linecap: round; }
.sd-dot.sel .ring { stroke: #ffd23f; }
.sd-dot.sel .core { fill: #ffd23f; }
.sd-dot.target .ring { stroke: rgba(255, 255, 255, 0.35); stroke-dasharray: 4 4; }
/* 이 점과 이으면 내 삼각형이 닫힌다 — 빨간 원 + X 표시(색 + 모양) */
.sd-dot.danger .ring { stroke: #ff4d4d; }
.sd-dot.danger .core { fill: #3a1515; }
.sd-dot.danger .mark { stroke: #ff6b6b; }
.sd-dot:focus-visible .ring { stroke: #ffffff; }

.sd-msg { margin: 0; min-height: 20px; text-align: center; font-size: 14px; color: #c4c4c4; }
.sd-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; }