: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)) 12px max(16px, env(safe-area-inset-bottom)); gap: 10px;
}
.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; 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; }
.new-btn:active { background: #3d8ae8; }
.status { text-align: center; font-size: 13px; line-height: 1.3; color: #c4c0b6; min-height: 1.4em; padding: 0 6px; }

#game { flex: 1; display: flex; min-height: 0; }
.board { display: block; width: 100%; height: 100%; }

.controls { display: flex; flex-direction: column; gap: 8px; }
.pairs { display: flex; gap: 8px; justify-content: center; min-height: 50px; }
.pair-btn {
  flex: 1; max-width: 130px; font: inherit; font-weight: 800; font-size: 16px; color: #15171c;
  background: #ffd24a; border: none; border-radius: 12px; min-height: 50px; cursor: pointer;
  font-variant-numeric: tabular-nums;
}
.pair-btn:active { background: #e8bd35; }
.actions { display: flex; gap: 8px; }
.act { flex: 1; font: inherit; font-weight: 700; font-size: 16px; color: #fff; border: none; border-radius: 12px; min-height: 54px; cursor: pointer; }
.roll-btn { background: #39b54a; } .roll-btn:active { background: #2f9e40; }
.stop-btn { background: #d6334e; } .stop-btn:active { background: #b82a42; }

.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;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); 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)); }

.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-howto { margin: 0; font-size: 14px; line-height: 1.5; color: #c8c8c8; }
.overlay-score { margin: 0; font-size: 56px; font-weight: 800; font-variant-numeric: tabular-nums; letter-spacing: -0.04em; line-height: 1; }
.overlay-sub { margin: 0; font-size: 14px; 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%; }
.overlay-card button:active { background: rgba(255,255,255,0.18); }
.overlay-card .save-btn { background: #4f9eff; border-color: #4f9eff; }