:root{--primary: #3498db;--primary-light: #ecf3f9;--bg: #F0F4F8;--white: #FFFFFF;--text: #2c3e50;--radius: 24px;--shadow: 0 10px 40px rgba(0, 0, 0, .1);--x-color: #3498db;--o-color: #e74c3c}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg);color:var(--text);display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;margin:0;overflow-x:hidden}#root{width:100%;max-width:500px;height:100vh;padding:10px;display:flex;flex-direction:column;justify-content:center}.card{background:var(--white);border-radius:var(--radius);padding:min(1.5rem,3vh);box-shadow:var(--shadow);text-align:center;max-height:98vh;display:flex;flex-direction:column;justify-content:center;align-items:center;position:relative;overflow:hidden}.nav-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;width:100%}.title{font-size:min(1.5rem,4vh);margin:0;font-weight:800;color:#555;letter-spacing:-.5px}.icon-btn{background:#f1f2f6;border:none;border-radius:12px;padding:10px;cursor:pointer;color:#555;transition:all .2s cubic-bezier(.175,.885,.32,1.275);display:flex;align-items:center;justify-content:center;text-decoration:none}.icon-btn:active{transform:scale(.9)}.turn-container{display:flex;gap:12px;width:100%;margin-bottom:2vh}.player-box{flex:1;padding:12px;border-radius:16px;background:#f8f9fa;display:flex;flex-direction:column;align-items:center;gap:4px;transition:all .3s ease;border:2px solid transparent;opacity:.6}.player-box.active{opacity:1;transform:scale(1.05)}.player-box.x.active{background:#e3f2fd;border-color:var(--x-color);color:var(--x-color);box-shadow:0 4px 12px #3498db33}.player-box.o.active{background:#fbe9e7;border-color:var(--o-color);color:var(--o-color);box-shadow:0 4px 12px #e74c3c33}.player-label{font-size:.8rem;font-weight:700;text-transform:uppercase}.player-icon{display:flex;align-items:center;justify-content:center}@keyframes pulse{0%{transform:scale(1)}to{transform:scale(1.05)}}.game-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;width:min(90vw,40vh);aspect-ratio:1/1;margin-bottom:2rem}.square{background:#f8f9fa;border:2px solid transparent;border-radius:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s cubic-bezier(.175,.885,.32,1.275);box-shadow:0 4px 6px #00000005}.square:hover{background:#fff;border-color:var(--primary-light);transform:translateY(-2px);box-shadow:0 8px 15px #0000000d}.square.filled{background:#fff;cursor:default}.square.highlight{background:#e1f5fe;border-color:var(--primary);animation:win-glow 1s infinite alternate}@keyframes win-glow{0%{box-shadow:0 0 5px #3498db4d}to{box-shadow:0 0 20px #3498db99}}.icon-x{color:var(--x-color);animation:pop .3s cubic-bezier(.175,.885,.32,1.275)}.icon-o{color:var(--o-color);animation:pop .3s cubic-bezier(.175,.885,.32,1.275)}@keyframes pop{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}.win-overlay{position:absolute;inset:0;background:#ffffffe6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:10;animation:fadeIn .4s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.congrats{font-size:2rem;font-weight:800;color:var(--text);margin-bottom:2rem;padding:0 20px}.restart-btn{background:var(--primary);color:#fff;border:none;padding:16px 48px;border-radius:100px;font-size:1.1rem;font-weight:700;cursor:pointer;box-shadow:0 10px 20px #3498db4d;transition:all .2s}.restart-btn:hover{transform:translateY(-2px);box-shadow:0 15px 30px #3498db66}.ad-container{width:100%;min-height:100px;background:#f1f2f6;border-radius:12px;margin-top:1rem;display:flex;justify-content:center;align-items:center;border:1px dashed #ced4da;padding:10px}