.chess-stage{width:min(92vw,78vmin,820px);max-width:100%;margin:0 auto;padding:4px 0 8px}.chess-canvas-wrap{position:relative;width:100%;aspect-ratio:1.05/1;border-radius:16px;overflow:hidden;background:radial-gradient(ellipse at 50% 18%,rgba(180,230,220,.55) 0,transparent 55%),linear-gradient(180deg,#6eb8c8,#8ec8b0 42%,#3d6b48);box-shadow:0 18px 40px rgba(20,40,35,.45),inset 0 1px 0 rgba(220,255,240,.18)}.chess-canvas-wrap canvas{display:block;width:100%!important;height:100%!important;touch-action:none}.chess-hud-overlay{position:absolute;top:3.5%;left:50%;transform:translateX(-50%);z-index:2;pointer-events:none;display:flex;flex-direction:column;align-items:center;gap:4px;max-width:min(92%,360px);text-align:center}.chess-hud-turn{font-size:clamp(14px,2.6vw,18px);font-weight:800;letter-spacing:.03em;line-height:1.2;padding:6px 14px;border-radius:999px;color:#0f1a14;background:rgba(236,248,242,.88);box-shadow:0 4px 18px rgba(12,28,22,.35);backdrop-filter:blur(6px)}.chess-hud-turn[data-side=w]{color:#1a2228;background:rgba(220,228,236,.92)}.chess-hud-turn[data-side=b]{color:#2a1e08;background:rgba(232,196,88,.92)}.chess-hud-score{font-size:clamp(11px,2vw,13px);font-weight:700;letter-spacing:.02em;color:rgba(245,252,248,.95);text-shadow:0 1px 4px rgba(8,20,16,.75);padding:2px 10px;border-radius:999px;background:rgba(18,36,28,.42)}@media (max-width:1024px){.chess-stage{width:min(90vw,70vmin,680px)}}@media (max-width:640px){.chess-stage{width:min(96vw,58vh,480px)}.chess-canvas-wrap{border-radius:12px}}.chess-play-shell{height:100dvh;max-height:100svh;overflow:hidden}.chess-play-shell .chess-stage{width:min(100%,58dvh,560px);flex:1 1 auto;min-height:0;display:flex;flex-direction:column;padding-bottom:2px}.chess-play-shell .chess-canvas-wrap{height:100%;max-height:min(62dvh,720px);aspect-ratio:auto}@media (min-width:768px){.chess-play-shell .chess-stage{width:min(100%,68dvh,680px)}.chess-play-shell .chess-canvas-wrap{max-height:min(70dvh,760px)}}@media (min-width:1024px){.chess-play-shell .chess-stage{width:min(100%,74dvh,780px)}.chess-play-shell .chess-canvas-wrap{max-height:min(78dvh,820px)}}.chess-gameover-backdrop{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;padding:20px 16px;background:radial-gradient(ellipse at 50% 30%,rgba(40,70,55,.55) 0,transparent 55%),rgba(8,16,14,.72);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);animation:chess-gameover-fade .28s ease-out}@keyframes chess-gameover-fade{0%{opacity:0}to{opacity:1}}.chess-gameover-card{width:min(100%,420px);border-radius:20px;border:1px solid rgba(220,236,228,.22);background:linear-gradient(165deg,rgba(36,52,44,.97),rgba(18,28,24,.98));box-shadow:0 24px 60px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.08);padding:28px 24px 22px;text-align:center;color:#f2f7f4;animation:chess-gameover-pop .34s cubic-bezier(.22,1,.36,1)}@keyframes chess-gameover-pop{0%{opacity:0;transform:translateY(12px) scale(.96)}to{opacity:1;transform:none}}.chess-gameover-kicker{margin:0;font-size:clamp(28px,6vw,36px);font-weight:900;letter-spacing:.14em;line-height:1.05;text-transform:uppercase;color:#e8f0ea}.chess-gameover-result{margin:10px 0 0;font-size:clamp(20px,4.5vw,26px);font-weight:800;letter-spacing:.02em;line-height:1.2}.chess-gameover-result[data-side=w]{color:#d0d8e0}.chess-gameover-result[data-side=b]{color:#e8c458}.chess-gameover-result[data-side=draw]{color:#b8cfc4}.chess-gameover-detail{margin:8px 0 0;font-size:13px;font-weight:600;color:rgba(220,236,228,.72)}.chess-gameover-score{margin:14px 0 0;font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;color:rgba(240,248,244,.92)}.chess-gameover-pot{margin:8px 0 0;font-size:14px;font-weight:700;color:#e8c458}.chess-gameover-actions{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:22px}.chess-gameover-actions button{border-radius:999px;padding:10px 18px;font-size:14px;font-weight:800;cursor:pointer;border:1px solid transparent}.chess-gameover-primary{background:#e8c458;color:#1a1408}.chess-gameover-primary:disabled{opacity:.55;cursor:not-allowed}.chess-gameover-secondary{background:rgba(255,255,255,.08);border-color:rgba(220,236,228,.28)!important;color:#f2f7f4}.chess-gameover-ghost{background:transparent;border-color:rgba(220,236,228,.2)!important;color:rgba(220,236,228,.85)}.chess-gameover-dismiss{display:block;width:100%;margin-top:12px;padding:6px;border:none;background:none;color:rgba(220,236,228,.55);font-size:12px;font-weight:600;cursor:pointer;text-decoration:underline;text-underline-offset:2px}