: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: 22px;
  width: 100%;
}

/* 정답 슬롯 — 타일 수만큼 빈 칸이 생기고, 채우면 글자가 들어간다. */
.an-slots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.an-slots.shake { animation: an-shake 0.36s ease; }

@keyframes an-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  45% { transform: translateX(7px); }
  70% { transform: translateX(-4px); }
}

.an-slot {
  width: clamp(34px, 10.5vw, 46px);
  height: clamp(44px, 13vw, 58px);
  border-radius: 10px;
  border: 2px dashed #3a3a3a;
  background: #121212;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(18px, 5.4vw, 26px);
  font-weight: 800;
  color: #f5f5f5;
}

.an-slot.filled {
  border-style: solid;
  border-color: #4f9eff;
  background: #16283c;
  cursor: pointer;
}

.an-hint {
  min-height: 20px;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  color: #f5f5f5;
  padding: 0 12px;
}
.an-hint.dim  { color: #9aa3b2; font-weight: 600; }
.an-hint.good { color: #6bd16b; font-size: 20px; letter-spacing: 0.06em; }

.an-tiles {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.an-tile {
  font: inherit;
  width: clamp(34px, 10.5vw, 46px);
  height: clamp(44px, 13vw, 58px);
  border-radius: 10px;
  border: 1px solid #3a3a3a;
  background: #f3efe2;
  color: #17202e;
  font-size: clamp(18px, 5.4vw, 26px);
  font-weight: 800;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.an-tile:active { background: #ddd6c2; }

/* 이미 슬롯에 올라간 타일은 자리를 지켜야 한다 — 없애면 남은 타일이 밀려
   손가락이 방금 본 위치를 놓친다. */
.an-tile.used {
  background: #1a1a1a;
  border-color: #262626;
  color: transparent;
  cursor: default;
}

.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; }