.reversi-shell{color:#e4eee7;box-sizing:border-box;background:radial-gradient(circle at 50% 20%,#15241b 0%,#09120e 70%,#040806 100%);flex-direction:column;align-items:center;min-height:100vh;padding:1rem;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex;position:relative;overflow-x:hidden}.reversi-backdrop{pointer-events:none;background:radial-gradient(#22c55e0d 0%,#0000 70%);position:absolute;inset:0}.reversi-header{z-index:10;border-bottom:1px solid #ffffff1a;justify-content:space-between;align-items:center;width:100%;max-width:900px;margin-bottom:1.5rem;padding:.75rem 1rem;display:flex}.reversi-home{color:#94a3b8;background:#ffffff0d;border-radius:6px;padding:.4rem .8rem;font-size:.9rem;text-decoration:none;transition:all .2s}.reversi-home:hover{color:#fff;background:#ffffff1f}.reversi-brand{align-items:center;gap:.75rem;display:flex}.reversi-brand span.seal{color:#fff;background:linear-gradient(135deg,#10b981 0%,#047857 100%);border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;font-size:1.1rem;font-weight:900;display:inline-flex;box-shadow:0 4px 12px #10b9814d}.reversi-brand h1{letter-spacing:.05em;margin:0;font-size:1.25rem;font-weight:700}.reversi-brand small{color:#6ee7b7;letter-spacing:.1em;font-size:.65rem;display:block}.reversi-tools{gap:.5rem;display:flex}.reversi-tools button{color:#e2e8f0;cursor:pointer;background:#ffffff14;border:1px solid #ffffff26;border-radius:6px;padding:.4rem .8rem;font-size:.85rem;transition:all .2s}.reversi-tools button:hover{background:#ffffff26;border-color:#ffffff4d}.reversi-main{z-index:1;flex-direction:column;align-items:center;gap:1.5rem;width:100%;max-width:900px;display:flex}.reversi-scoreboard{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0f1c15bf;border:1px solid #ffffff1a;border-radius:12px;justify-content:space-between;align-items:center;width:100%;max-width:520px;padding:.75rem 1.5rem;display:flex;box-shadow:0 8px 24px #0000004d}.player-stat{align-items:center;gap:.75rem;display:flex}.player-stat.active{position:relative}.player-stat.active:after{content:"";background:#10b981;border-radius:2px;height:3px;position:absolute;bottom:-6px;left:0;right:0;box-shadow:0 0 8px #10b981}.disc-icon{border-radius:50%;width:28px;height:28px;box-shadow:0 2px 6px #0006}.disc-icon.black{background:radial-gradient(circle at 35% 35%,#475569 0%,#0f172a 100%);border:1px solid #64748b}.disc-icon.white{background:radial-gradient(circle at 35% 35%,#fff 0%,#cbd5e1 100%);border:1px solid #94a3b8}.player-info{flex-direction:column;display:flex}.player-info strong{font-size:1rem;font-weight:700}.player-info small{color:#94a3b8;font-size:.75rem}.score-count{font-family:monospace;font-size:1.5rem;font-weight:800}.turn-indicator{color:#6ee7b7;background:#10b9811f;border:1px solid #10b98140;border-radius:20px;padding:.3rem .8rem;font-size:.9rem;font-weight:600}.reversi-board-wrapper{perspective:1000px}.reversi-board{-webkit-user-select:none;user-select:none;box-sizing:border-box;background:#115e59;border:8px solid #0f766e;border-radius:12px;grid-template-rows:repeat(8,1fr);grid-template-columns:repeat(8,1fr);gap:3px;width:90vw;max-width:500px;height:90vw;max-height:500px;padding:3px;display:grid;box-shadow:0 16px 36px #00000080,inset 0 2px 6px #fff3}.reversi-cell{cursor:default;background:#134e4a;border-radius:4px;justify-content:center;align-items:center;transition:background .15s;display:flex;position:relative}.reversi-cell.valid-move{cursor:pointer}.reversi-cell.valid-move:hover{background:#115e59}.legal-dot{pointer-events:none;background:#6ee7b766;border-radius:50%;width:12px;height:12px;animation:1.5s infinite alternate pulseDot;box-shadow:0 0 6px #6ee7b799}@keyframes pulseDot{0%{opacity:.4;transform:scale(.85)}to{opacity:.8;transform:scale(1.15)}}.reversi-disc{border-radius:50%;width:82%;height:82%;transition:transform .4s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 8px #0006}.reversi-disc.black{background:radial-gradient(circle at 35% 35%,#475569 0%,#0f172a 100%);border:1px solid #334155}.reversi-disc.white{background:radial-gradient(circle at 35% 35%,#fff 0%,#e2e8f0 100%);border:1px solid #cbd5e1}.reversi-disc.flipping{transform:rotateY(180deg)scale(1.08)}.reversi-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;background:#000000bf;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.reversi-dialog{background:#0f1c15;border:1px solid #ffffff26;border-radius:16px;flex-direction:column;gap:1.25rem;width:100%;max-width:480px;padding:1.75rem;display:flex;box-shadow:0 20px 40px #0009}.reversi-dialog h2{color:#6ee7b7;margin:0;font-size:1.5rem}.reversi-dialog p{color:#cbd5e1;margin:0;font-size:.95rem;line-height:1.5}.dialog-actions{justify-content:flex-end;gap:.75rem;margin-top:.5rem;display:flex}.dialog-actions button{cursor:pointer;border:none;border-radius:8px;padding:.6rem 1.2rem;font-size:.9rem;font-weight:600;transition:all .2s}.dialog-actions button.primary{color:#fff;background:linear-gradient(135deg,#10b981 0%,#059669 100%);box-shadow:0 4px 12px #10b9814d}.dialog-actions button.primary:hover{background:linear-gradient(135deg,#059669 0%,#047857 100%)}.dialog-actions button.secondary{color:#e2e8f0;background:#ffffff1a}.dialog-actions button.secondary:hover{background:#ffffff2e}