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55%,transparent);box-shadow:0 0 calc(16px * var(--glow-strength)) var(--glow)}.players__row--empty{justify-content:center;color:var(--muted);font-size:14px}.players__mark{font-family:var(--font-mono);font-size:16px;color:var(--accent)}.players__name{flex:1;font-size:14px}.board-room__layout{display:grid;gap:20px}.board-room__layout--compact{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}.xo-board{gap:14px}.xo-grid{display:grid;gap:8px}.xo-grid--small{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.xo-grid--large{grid-template-columns:repeat(10,minmax(0,1fr));gap:6px}.xo-cell{aspect-ratio:1 / 1;border-radius:10px;border:1px solid var(--border);background:var(--panel2);color:var(--text);font-family:var(--font-mono);font-size:20px;display:grid;place-items:center;transition:transform .2s ease,border .2s ease,box-shadow .2s ease}.xo-grid--large .xo-cell{font-size:20px;border-radius:6px}.xo-cell:disabled{cursor:not-allowed}.xo-cell:not(:disabled):hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--accent) 65%,transparent)}.xo-cell--x{color:var(--accent)}.xo-cell--o{color:var(--info)}.xo-cell--win{border-color:color-mix(in srgb,var(--accent) 80%,transparent);box-shadow:0 0 calc(14px * var(--glow-strength)) var(--glow)}.cell--preview{background:color-mix(in srgb,var(--accent) 30%,transparent);border-color:color-mix(in srgb,var(--accent) 65%,transparent)}.cell--preview-invalid{background:color-mix(in srgb,var(--danger) 35%,transparent);border-color:color-mix(in srgb,var(--danger) 75%,transparent)}@media(max-width:900px){.app__header{flex-direction:column;align-items:flex-start}.board-room__layout--compact{grid-template-columns:1fr}.app__header-meta{justify-content:flex-start}.placement,.room__top{align-items:flex-start}.game-detail__layout,.boards{grid-template-columns:1fr}.app__footer{flex-direction:column;align-items:flex-start}}@media(max-width:520px){.btn--tiny,.btn--ghost,.game-detail__actions .btn{padding:10px;font-size:14px;border-radius:12px}.ai-difficulty{width:100%}.app{padding:20px 12px 40px;gap:20px}.app__shell{gap:20px}.app__header{gap:16px;padding-bottom:12px}.logo{gap:12px}.logo__title{font-size:18px}.logo__subtitle{font-size:12px}.app__header-meta{width:100%;justify-content:flex-start;flex-direction:column;align-items:flex-start}.home__actions{flex-direction:column;align-items:stretch}.breadcrumbs{font-size:11px;letter-spacing:.06em}.room__top{flex-direction:column;align-items:flex-start}.game-card__actions{flex-direction:column}.game-card__actions .btn{width:100%;text-align:center}.game-detail__actions .btn{width:100%}.game-card__preview{width:140px;right:8px;top:auto;transform:none;opacity:.1;bottom:60px}.game-grid{grid-template-columns:1fr}.status-grid{grid-template-columns:repeat(2,1fr)}.board{padding:12px}.board__grid{gap:4px}.xo-grid{gap:6px}.xo-grid--large{gap:4px}.xo-cell{font-size:16px}.toast{right:12px;left:12px;bottom:12px}.app__footer{font-size:12px}}@media(max-width:360px){.app{padding:16px 10px 32px}.hero__title{font-size:24px}.room__title{font-size:20px}.game-card__top h2{font-size:18px}.btn{padding:9px 12px;font-size:13px}.board__title,.board__overlay{font-size:11px}.game-detail__title{font-size:20px}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}