html,body{margin:0;padding:0;min-height:100%;background:radial-gradient(120% 90% at 50% 0%,#141d42 0%,#0a0a18 70%);
  color:#e2e8f0;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;
  display:flex;flex-direction:column;align-items:center;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
#stage{width:min(96vw,520px);display:flex;flex-direction:column;align-items:center}
#topbar{display:flex;gap:8px;margin:10px 0 6px;flex-wrap:wrap;justify-content:center;align-items:center}
.tab{font:inherit;font-size:.88rem;font-weight:700;min-height:44px;padding:8px 16px;border:1px solid #2b3564;
  background:rgba(20,26,53,.85);color:#94a3b8;border-radius:999px;cursor:pointer;transition:all .2s}
.tab.on{background:linear-gradient(135deg,#22d3ee,#a78bfa);border-color:transparent;color:#0b1020;
  box-shadow:0 0 14px rgba(34,211,238,.35)}
#diff{display:flex;gap:6px}
#diff.hide{display:none}
.dbtn{font:inherit;font-size:.82rem;font-weight:700;min-height:44px;padding:8px 14px;border-radius:999px;
  border:1px solid #2b3564;background:rgba(20,26,53,.85);color:#94a3b8;cursor:pointer}
.dbtn.on{border-color:#22d3ee;color:#22d3ee;box-shadow:0 0 10px rgba(34,211,238,.3)}
#hud{display:flex;gap:10px;margin:6px 0 8px}
.chip{background:rgba(20,26,53,.85);border:1px solid #2b3564;border-radius:999px;padding:5px 14px;font-size:.88rem;font-weight:700}
.chip b{color:#22d3ee}
#gridwrap{overflow-x:auto;max-width:96vw}
#grid{border-collapse:collapse;background:rgba(20,26,53,.9);border:2px solid rgba(34,211,238,.35);
  border-radius:12px;overflow:hidden;box-shadow:0 0 28px rgba(34,211,238,.1),0 10px 40px rgba(0,0,0,.5)}
#grid td{width:40px;height:40px;min-width:40px;text-align:center;vertical-align:middle;
  border:1px solid #1e2a4a;font-weight:800;font-size:1.15rem;cursor:pointer;transition:background .12s}
#grid td.bl{border-left:2px solid #31437a}
#grid td.bt{border-top:2px solid #31437a}
#grid td.given{color:#7dd3fc;background:rgba(34,211,238,.06);cursor:default}
#grid td.user{color:#e2e8f0}
#grid td.sel{background:rgba(34,211,238,.18);box-shadow:inset 0 0 0 2px #22d3ee}
#grid td.peer{background:rgba(34,211,238,.07)}
#grid td.same{color:#22d3ee}
#grid td.conflict{color:#ff2d95;background:rgba(255,45,149,.14);animation:conf .4s ease}
@keyframes conf{0%{transform:scale(1)}50%{transform:scale(1.18)}100%{transform:scale(1)}}
#pad{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;width:min(92vw,408px);margin:12px 0 6px}
#pad button{font:inherit;font-weight:900;font-size:1.2rem;min-height:48px;border-radius:10px;
  border:1px solid #2b3564;background:rgba(20,26,53,.85);color:#e2e8f0;cursor:pointer;transition:all .12s}
#pad button:hover{border-color:#22d3ee;box-shadow:0 0 10px rgba(34,211,238,.3)}
#pad button:active{transform:scale(.94)}
#pad button.erase{color:#ff8fb3}
#msg{min-height:22px;margin:6px 0 12px;font-size:.9rem;text-align:center;color:#7c8db5}
/* 胜利面板 */
.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(5,5,20,.88);backdrop-filter:blur(4px);z-index:20}
.overlay.hide{display:none}
.panel{background:rgba(20,26,53,.95);border:1px solid rgba(34,211,238,.4);border-radius:16px;
  padding:26px 34px;text-align:center;animation:panelin .45s cubic-bezier(.2,1.4,.4,1)}
@keyframes panelin{from{transform:translateY(30px) scale(.85);opacity:0}to{transform:none;opacity:1}}
.panel h2{margin:0 0 6px;font-size:1.4rem;background:linear-gradient(135deg,#22d3ee,#a78bfa);
  -webkit-background-clip:text;background-clip:text;color:transparent}
#wEmo{font-size:2.6rem;margin:6px 0}
.panel p{margin:0 0 12px;color:#94a3b8}
#wStats{margin:0 0 12px}
#wStats .wtime{font-size:1.5rem;font-weight:900;color:#22d3ee}
#wStats .rankline{margin-top:4px;font-weight:900;color:#ffd54a;font-size:1.05rem}
#wStats .stars{letter-spacing:2px;color:#ffd54a}
#wStats .next{margin-top:2px;color:#7c8db5;font-size:.85rem}
#wRow{display:flex;gap:10px;justify-content:center}
#wRow button{font:inherit;font-weight:800;min-height:44px;padding:10px 26px;border-radius:10px;cursor:pointer}
#wShare{border:1px solid #2b3564;background:rgba(20,26,53,.85);color:#22d3ee}
#wClose{border:0;background:linear-gradient(135deg,#22d3ee,#a78bfa);color:#0b1020;
  box-shadow:0 0 14px rgba(34,211,238,.35)}
.cf{position:fixed;top:-4%;width:8px;height:12px;border-radius:2px;pointer-events:none;z-index:21;
  animation:cfall 1.2s ease-in forwards}
@keyframes cfall{0%{transform:translate(0,0) rotate(0);opacity:1}
  100%{transform:translate(var(--dx),58vh) rotate(540deg);opacity:0}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}