: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: 12px;
}

.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;
}

.solved-val,
.time-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;
}

.time-val.low { color: #ff7070; }

.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; }

#game {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.m1-misses {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.35em;
  color: #4a4a4a;
  line-height: 1;
  min-height: 18px;
}

.m1-misses.warn { color: #ff7070; }

.m1-board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  width: min(100%, 56dvh);
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
  flex: 0 0 auto;
}

/* 틀린 수를 두면 판을 짧게 흔든다 — 색만 바꾸면 폰에서 잘 눈치채지 못한다. */
.m1-board.shake { animation: m1-shake 0.32s ease; }

@keyframes m1-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  45% { transform: translateX(5px); }
  70% { transform: translateX(-3px); }
}

.m1-sq {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  font-size: clamp(20px, 8.2vw, 40px);
  line-height: 1;
  cursor: pointer;
}

.m1-sq.light { background: #e6e2cf; }
.m1-sq.dark  { background: #6f8f5a; }

/* chess와 같은 방식 — 유니코드 '검은 말' 글리프 하나만 쓰고 색으로 구분한다.
   폰트에 따라 흰 말(U+2654)의 속 빈 모양이 배경과 섞여 안 보이는 일이 있어서다. */
.m1-sq.w {
  color: #ffffff;
  text-shadow: 0 0 1px #14161a, 0 1px 2px rgba(0,0,0,0.45),
    1px 0 0 #14161a, -1px 0 0 #14161a, 0 1px 0 #14161a, 0 -1px 0 #14161a;
}
.m1-sq.b { color: #16181d; text-shadow: 0 1px 2px rgba(0,0,0,0.35); }

.m1-sq.sel::before {
  content: ''; position: absolute; inset: 0; background: rgba(79, 158, 255, 0.45);
}
.m1-sq.mated::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle, rgba(255,80,80,0.8), rgba(255,80,80,0) 70%);
}
/* 빈 칸 목적지는 점, 잡는 수는 테두리 — 말 그림을 가리지 않는다. */
.m1-sq.dest::after {
  content: ''; position: absolute; width: 30%; height: 30%;
  border-radius: 50%; background: rgba(20, 30, 45, 0.42);
}
.m1-sq.cap::after {
  content: ''; position: absolute; inset: 6%;
  border: 3px solid rgba(20, 30, 45, 0.45); border-radius: 50%;
}
.m1-sq > * { position: relative; z-index: 1; }

.m1-status {
  flex: 0 0 auto;
  min-height: 22px;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  color: #f5f5f5;
}
.m1-status.dim  { color: #9aa3b2; }
.m1-status.warn { color: #ff8080; }
.m1-status.good { color: #6bd16b; font-size: 20px; }

.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); }
}

.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: 48px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
  line-height: 1;
}

.overlay-meta { margin: -4px 0 4px; font-size: 14px; font-weight: 600; color: #a0a0a0; }

.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; }