*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary:#0f0f1a;--bg-secondary:#1a1a2e;--bg-card:#16213e;--accent-x:#e94560;--accent-o:#0f3460;--accent-o-light:#4fc3f7;--text-primary:#eaeaea;--text-secondary:#a0a0b0;--border-color:#2a2a4a;--hover-bg:#1e2a4a;--shadow:0 8px 32px rgba(0,0,0,.4);--glow-x:0 0 20px rgba(233,69,96,.5);--glow-o:0 0 20px rgba(79,195,247,.5)}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;background-image:radial-gradient(ellipse at top left,rgba(233,69,96,.08) 0,transparent 50%),radial-gradient(ellipse at bottom right,rgba(79,195,247,.08) 0,transparent 50%)}.container{max-width:900px;margin:0 auto;padding:2rem 1rem}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:3rem;font-weight:800;background:linear-gradient(135deg,var(--accent-x),var(--accent-o-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-1px;margin-bottom:.5rem}.header p{color:var(--text-secondary);font-size:1rem}.game-layout{display:grid;grid-template-columns:1fr 320px;grid-gap:2rem;gap:2rem;align-items:start}@media (max-width:768px){.game-layout{grid-template-columns:1fr}.header h1{font-size:2rem}}.game-section{display:flex;flex-direction:column;align-items:center;gap:1.5rem}.status-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:1rem 2rem;text-align:center;width:100%;box-shadow:var(--shadow)}.status-text{font-size:1.2rem;font-weight:600;color:var(--text-primary)}.status-text.winner-x{color:var(--accent-x);text-shadow:var(--glow-x)}.status-text.winner-o{color:var(--accent-o-light);text-shadow:var(--glow-o)}.status-text.draw{color:#f0c040;text-shadow:0 0 20px rgba(240,192,64,.5)}.board{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px;padding:1.5rem;background:var(--bg-card);border-radius:20px;border:1px solid var(--border-color);box-shadow:var(--shadow)}.cell{width:100px;height:100px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:12px;font-size:2.5rem;font-weight:900;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;position:relative;overflow:hidden}.cell:before{content:"";position:absolute;inset:0;background:transparent;transition:background .2s ease;border-radius:10px}.cell:hover:not(.filled):not(.game-over){background:var(--hover-bg);border-color:#4a4a8a;transform:scale(1.05);box-shadow:0 4px 15px rgba(0,0,0,.3)}.cell.x{color:var(--accent-x);border-color:rgba(233,69,96,.4);text-shadow:var(--glow-x);box-shadow:inset 0 0 20px rgba(233,69,96,.1)}.cell.o{color:var(--accent-o-light);border-color:rgba(79,195,247,.4);text-shadow:var(--glow-o);box-shadow:inset 0 0 20px rgba(79,195,247,.1)}.cell.winning{background:var(--hover-bg);animation:winPulse .6s ease forwards}.cell.x.winning{border-color:var(--accent-x);box-shadow:var(--glow-x),inset 0 0 30px rgba(233,69,96,.2)}.cell.o.winning{border-color:var(--accent-o-light);box-shadow:var(--glow-o),inset 0 0 30px rgba(79,195,247,.2)}@keyframes winPulse{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1.05)}}.cell.filled{cursor:default}.cell.game-over:not(.filled){cursor:not-allowed;opacity:.6}@media (max-width:480px){.cell{width:80px;height:80px;font-size:2rem}.board{gap:8px;padding:1rem}}.restart-btn{padding:.75rem 2rem;font-size:1rem;font-weight:700;background:linear-gradient(135deg,var(--accent-x),#c0392b);color:#fff;border:none;border-radius:12px;cursor:pointer;transition:all .2s ease;letter-spacing:.5px;box-shadow:0 4px 15px rgba(233,69,96,.3)}.restart-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(233,69,96,.5)}.restart-btn:active{transform:translateY(0)}.sidebar{display:flex;flex-direction:column;gap:1.5rem}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:1.5rem;box-shadow:var(--shadow)}.card h2{font-size:1.1rem;font-weight:700;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--border-color)}.scoreboard{display:flex;flex-direction:column;gap:.75rem}.score-item{justify-content:space-between;padding:.75rem 1rem;background:var(--bg-secondary);border-radius:10px;border:1px solid var(--border-color)}.score-item,.score-label{display:flex;align-items:center}.score-label{gap:.5rem;font-weight:600}.score-dot{width:10px;height:10px;border-radius:50%}.score-dot.x{background:var(--accent-x);box-shadow:var(--glow-x)}.score-dot.o{background:var(--accent-o-light);box-shadow:var(--glow-o)}.score-dot.draw{background:#f0c040;box-shadow:0 0 10px rgba(240,192,64,.5)}.score-value{font-size:1.4rem;font-weight:900;min-width:2rem;text-align:right}.score-value.x{color:var(--accent-x)}.score-value.o{color:var(--accent-o-light)}.score-value.draw{color:#f0c040}.history-list{display:flex;flex-direction:column;gap:.5rem;max-height:300px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border-color) transparent}.history-list::-webkit-scrollbar{width:4px}.history-list::-webkit-scrollbar-track{background:transparent}.history-list::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:2px}.history-item{display:flex;align-items:center;justify-content:space-between;padding:.5rem .75rem;background:var(--bg-secondary);border-radius:8px;font-size:.85rem}.history-winner{font-weight:700;padding:.2rem .6rem;border-radius:6px;font-size:.8rem}.history-winner.x{background:rgba(233,69,96,.2);color:var(--accent-x);border:1px solid rgba(233,69,96,.3)}.history-winner.o{background:rgba(79,195,247,.2);color:var(--accent-o-light);border:1px solid rgba(79,195,247,.3)}.history-winner.draw{background:rgba(240,192,64,.2);color:#f0c040;border:1px solid rgba(240,192,64,.3)}.history-date{color:var(--text-secondary);font-size:.75rem}.empty-history,.loading{text-align:center;color:var(--text-secondary);font-size:.9rem;padding:1rem}.loading{animation:pulse 1.5s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.turn-indicator{display:flex;gap:.5rem}.turn-badge,.turn-indicator{align-items:center;justify-content:center}.turn-badge{display:inline-flex;width:32px;height:32px;border-radius:8px;font-weight:900;font-size:1.1rem}.turn-badge.x{background:rgba(233,69,96,.2);color:var(--accent-x);border:2px solid var(--accent-x);box-shadow:var(--glow-x)}.turn-badge.o{background:rgba(79,195,247,.2);color:var(--accent-o-light);border:2px solid var(--accent-o-light);box-shadow:var(--glow-o)}