*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#07111f;color:#f7fbff;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}body{min-height:100vh;min-height:100dvh;overflow-x:hidden;background:radial-gradient(circle at 15% 15%,rgba(44,125,255,.18),transparent 30%),radial-gradient(circle at 85% 80%,rgba(255,69,140,.15),transparent 32%),linear-gradient(145deg,#07111f,#0d1d32 48%,#091522)}body:before{content:"";position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:32px 32px;mask-image:linear-gradient(to bottom,black,transparent)}button{font:inherit}.app{width:min(720px,100%);min-height:100dvh;margin:auto;padding:14px;display:flex;flex-direction:column;gap:12px}.glass{background:linear-gradient(145deg,rgba(17,39,66,.82),rgba(9,22,38,.88));border:1px solid rgba(255,255,255,.09);box-shadow:0 20px 60px rgba(0,0,0,.28),inset 0 1px rgba(255,255,255,.05);backdrop-filter:blur(15px);border-radius:24px}.topbar{display:flex;justify-content:space-between;align-items:center;padding:6px 4px}.eyebrow{font-size:.68rem;letter-spacing:.25em;color:#80a9d8;font-weight:800}.topbar h1{margin:2px 0 0;font-size:clamp(1.35rem,4vw,2rem)}.sync{display:flex;align-items:center;gap:7px;color:#9cb0c6;font-size:.78rem}.sync span{width:9px;height:9px;border-radius:50%;background:#6d7b8c;box-shadow:0 0 0 4px rgba(109,123,140,.12)}.sync.online span{background:#54e69d;box-shadow:0 0 15px #54e69d}.sync.busy span{background:#ffd166;animation:pulse 1s infinite}.sync.error span{background:#ff5e73;box-shadow:0 0 15px #ff5e73}.mode-panel{padding:15px}.mode-panel h2{font-size:.95rem;margin:0 0 10px;color:#d7e7f7}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mode-card{border:1px solid rgba(255,255,255,.08);border-radius:17px;padding:12px;background:rgba(255,255,255,.035);color:white;text-align:left;cursor:pointer;transition:.22s transform,.22s border-color,.22s background}.mode-card:hover,.mode-card:active{transform:translateY(-2px)}.mode-card.active{border-color:#55a7ff;background:linear-gradient(135deg,rgba(45,130,255,.18),rgba(87,71,255,.10));box-shadow:0 0 24px rgba(60,130,255,.12)}.mode-icon{font-size:1.35rem;display:block;margin-bottom:5px}.mode-card strong,.mode-card small{display:block}.mode-card small{color:#91a7bf;margin-top:3px;font-size:.72rem}.network-join{margin-top:12px;padding-top:12px;border-top:1px solid rgba(255,255,255,.07)}.hint{margin:0 0 10px;font-size:.8rem;color:#91a7bf}.seat-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}.seat{border:0;border-radius:14px;padding:11px 6px;color:white;font-weight:900;cursor:pointer}.seat.x{background:linear-gradient(135deg,#1677ff,#4f8fff)}.seat.o{background:linear-gradient(135deg,#ff3c87,#ff6b9d)}.seat.spectator{background:#26394d;color:#c4d1df}.seat:disabled{opacity:.35;cursor:not-allowed}.score{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:10px 14px}.score-box{text-align:center}.score-box span{font-size:1.15rem;font-weight:1000}.score-box strong{display:block;font-size:1.5rem;line-height:1}.score-box small,.round-box small{color:#8fa7c0;font-size:.67rem;text-transform:uppercase;letter-spacing:.1em}.x-score span,.x-score strong{color:#52a4ff}.o-score span,.o-score strong{color:#ff5d9b}.round-box{text-align:center;padding:0 14px;border-left:1px solid rgba(255,255,255,.08);border-right:1px solid rgba(255,255,255,.08)}.round-box strong{display:block;font-size:1.25rem}.tiny{display:block;margin:3px auto 0;border:0;background:transparent;color:#7893ae;font-size:.62rem;cursor:pointer}.game-card{padding:14px;display:flex;flex-direction:column;gap:12px;flex:1}.status-line{display:flex;justify-content:space-between;gap:10px;align-items:center;font-size:.84rem;color:#9fb1c5}.turn-indicator strong{color:#fff;font-size:1rem}.seat-info{font-size:.75rem;text-align:right}.board-wrap{position:relative;width:min(100%,54vh,520px);aspect-ratio:1;margin:auto}.board{position:absolute;inset:0;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:10px}.cell{border:1px solid rgba(255,255,255,.10);border-radius:23px;background:linear-gradient(145deg,rgba(28,58,92,.72),rgba(12,29,49,.9));box-shadow:inset 0 1px rgba(255,255,255,.05),0 8px 18px rgba(0,0,0,.15);cursor:pointer;display:grid;place-items:center;position:relative;overflow:hidden;transition:transform .14s,background .2s,border-color .2s}.cell:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at center,rgba(255,255,255,.10),transparent 60%);opacity:0;transition:.2s}.cell:hover:before{opacity:1}.cell:active{transform:scale(.94)}.cell:disabled{cursor:default}.mark{font-size:clamp(3rem,15vmin,7.7rem);line-height:.8;font-weight:1000;filter:drop-shadow(0 7px 18px rgba(0,0,0,.3));animation:markIn .33s cubic-bezier(.2,1.4,.45,1)}.mark.x{color:#53a8ff;text-shadow:0 0 25px rgba(60,151,255,.3)}.mark.o{color:#ff5998;text-shadow:0 0 25px rgba(255,72,143,.3)}.cell.win{animation:winnerCell .7s ease-in-out infinite alternate}.cell.win .mark{filter:drop-shadow(0 0 20px currentColor)}.win-line{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}.win-line line{stroke:#fff;stroke-width:7;stroke-linecap:round;filter:drop-shadow(0 0 9px white);stroke-dasharray:400;stroke-dashoffset:400;opacity:0}.win-line.show line{opacity:.8;animation:drawLine .55s ease forwards}.message{text-align:center;min-height:25px;font-size:clamp(1rem,3.6vw,1.3rem);font-weight:800}.message.win{animation:messagePop .5s ease;color:#ffe28a}.actions{display:flex;gap:9px;justify-content:center}.actions button{border:0;border-radius:15px;padding:11px 16px;font-weight:850;cursor:pointer;color:white}.primary{background:linear-gradient(135deg,#197cff,#635cff);box-shadow:0 9px 22px rgba(43,102,255,.23)}.secondary{background:#26394d}.hidden{display:none!important}.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:#101e30;border:1px solid rgba(255,255,255,.12);padding:10px 16px;border-radius:14px;box-shadow:0 15px 40px rgba(0,0,0,.35);font-size:.82rem;transition:.25s;z-index:20}.toast.show{opacity:1;transform:translate(-50%,0)}.celebration{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:12}.confetti{position:absolute;width:8px;height:16px;border-radius:2px;top:-20px;animation:confettiFall 1.8s linear forwards}.spectating .board{filter:saturate(.82)}@keyframes markIn{from{opacity:0;transform:scale(.2) rotate(-25deg)}to{opacity:1;transform:scale(1) rotate(0)}}@keyframes pulse{50%{opacity:.4}}@keyframes winnerCell{to{border-color:rgba(255,255,255,.7);transform:translateY(-2px)}}@keyframes drawLine{to{stroke-dashoffset:0}}@keyframes messagePop{50%{transform:scale(1.07)}}@keyframes confettiFall{to{transform:translate(var(--drift),110vh) rotate(720deg);opacity:.2}}@media(max-width:480px){.app{padding:9px;gap:9px}.glass{border-radius:19px}.mode-panel{padding:11px}.mode-card{padding:9px}.seat-row{grid-template-columns:1fr 1fr}.seat.spectator{grid-column:1/-1}.score{padding:8px 10px}.game-card{padding:10px}.board{gap:7px}.cell{border-radius:18px}.board-wrap{width:min(100%,52vh)}}@media(max-height:650px) and (orientation:landscape){.app{width:min(1000px,100%);display:grid;grid-template-columns:280px 1fr;grid-template-rows:auto 1fr;padding:8px}.topbar{grid-column:1/-1}.mode-panel{grid-column:1;grid-row:2}.score{grid-column:1;align-self:end}.game-card{grid-column:2;grid-row:2 / span 2}.board-wrap{width:min(55vh,430px)}}