: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)) 14px max(16px, env(safe-area-inset-bottom));
  gap: 10px;
}

/* 점수바 */
.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;
}
.streak-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; }

/* 손에 든 말 배너 */
.hand-bar {
  display: flex; align-items: center; gap: 12px;
  background: #14141c; border: 1px solid #26262f; border-radius: 12px;
  padding: 8px 14px; min-height: 60px;
}
.hand-label { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: #9a9aa6; }
.hand-slot { width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; }
.hand-slot.empty::after { content: '—'; color: #55555f; font-size: 20px; }

.message { margin: 0; text-align: center; font-size: 14px; font-weight: 600; color: #c7c7d0; min-height: 18px; }

/* 4×4 보드 */
.board {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px;
  width: min(92vw, 56vh, 380px); aspect-ratio: 1; margin: 0 auto;
  padding: 8px; background: #14141c; border: 1px solid #24242e; border-radius: 14px;
}
.cell {
  background: #1d1d26; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  position: relative; transition: background 0.12s ease;
}
.cell.legal { cursor: pointer; box-shadow: inset 0 0 0 2px rgba(79,158,255,0.35); }
.cell.legal:active { background: #262633; }
.cell.last::before {
  content: ''; position: absolute; inset: 3px; border-radius: 8px;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,0.25);
}
.cell.win { box-shadow: inset 0 0 0 3px rgba(46,194,126,0.85); }

/* 트레이 (남은 말) */
.tray {
  display: grid; grid-template-columns: repeat(8, 1fr); gap: 5px;
  width: min(92vw, 380px); margin: 2px auto 0;
}
.tray-slot {
  aspect-ratio: 1; background: #17171f; border-radius: 8px;
  display: flex; align-items: center; justify-content: center; position: relative;
}
.tray-slot.used { background: #101015; }
.tray-slot.legal { cursor: pointer; box-shadow: inset 0 0 0 2px rgba(79,158,255,0.45); }
.tray-slot.legal:active { background: #21212c; }

/* ─── 말(piece) — 4비트 특성 ─── */
.qp {
  box-sizing: border-box; position: relative;
  display: inline-block; flex: 0 0 auto;
}
/* 크기 */
.qp.s-tall  { width: 78%; height: 78%; }
.qp.s-short { width: 52%; height: 52%; }
/* 모양 */
.qp.sh-round  { border-radius: 50%; }
.qp.sh-square { border-radius: 16%; }
/* 색 */
.qp.c-light {
  background: radial-gradient(circle at 34% 28%, #f6f1e2, #cbc3a8 78%);
  border: 2px solid #b3ab92;
  box-shadow: 0 1px 2px rgba(0,0,0,0.5);
}
.qp.c-dark {
  background: radial-gradient(circle at 34% 28%, #565565, #16161d 80%);
  border: 2px solid #4d4d59;
  box-shadow: 0 1px 2px rgba(0,0,0,0.5);
}
/* 속 빔 = 가운데 구멍(양 색에서 모두 읽히도록 inset shadow) */
.qp.t-hollow::after {
  content: ''; position: absolute; inset: 30%; border-radius: inherit;
  background: #101017;
  box-shadow: inset 0 0 0 2px rgba(0,0,0,0.55), inset 0 2px 3px rgba(0,0,0,0.7);
}

/* 트레이 안의 작은 말도 같은 비율로 */
.tray-slot .qp.s-tall  { width: 82%; height: 82%; }
.tray-slot .qp.s-short { width: 56%; height: 56%; }

/* 좌상단 ← 홈, 우상단 🏆 — 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 */
.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: 52px; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: -0.04em; line-height: 1; }
.overlay-score .unit { font-size: 18px; font-weight: 700; color: #a0a0a0; letter-spacing: 0; }
.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; }