:root{color-scheme:dark;--bg: #0b0f16;--bg-elevated: #121822;--bg-sunken: #070a10;--border: #232c3a;--border-strong: #334054;--text: #e4e9f2;--text-muted: #8d9bb3;--accent: #3d8bfd;--accent-strong: #5a9dff;--mark-x: #4cc2ff;--mark-o: #ff8a5c;--success: #3fb950;--danger: #f4655f;--warning: #e3b341;--radius-sm: 8px;--radius: 14px;--radius-lg: 20px;--shadow: 0 18px 50px rgb(0 0 0 / 45%);--focus-ring: 0 0 0 3px rgb(61 139 253 / 45%);font-family:Inter,Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--text);-webkit-text-size-adjust:100%}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(1200px 600px at 50% -10%,#182133 0%,transparent 60%),var(--bg)}button,input{font:inherit;color:inherit}:where(button,input,[tabindex]):focus-visible{outline:none;box-shadow:var(--focus-ring)}code{background:var(--bg-sunken);border-radius:4px;padding:1px 5px;font-size:.9em}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.app-shell{max-width:1080px;margin:0 auto;min-height:100vh;padding:clamp(16px,3vw,32px);display:flex;flex-direction:column;gap:20px}.app-shell--wide{max-width:1440px}.app-header{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:14px}.brand__mark{display:grid;place-items:center;width:46px;height:46px;border-radius:var(--radius);background:linear-gradient(135deg,var(--mark-x),var(--accent));color:#05080e;font-weight:800;letter-spacing:.5px}.brand h1{margin:0;font-size:clamp(1.4rem,2.5vw,1.9rem);line-height:1.1}.brand__tagline{margin:2px 0 0;color:var(--text-muted);font-size:.85rem}.user-info{display:flex;align-items:center;gap:12px}.user-info__identity{display:flex;flex-direction:column;align-items:flex-end;line-height:1.3}.user-info__name{font-weight:600}.user-info__record{color:var(--text-muted);font-size:.8rem;font-variant-numeric:tabular-nums}main{display:flex;flex-direction:column;gap:20px}.card{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-lg);padding:clamp(18px,3vw,28px);box-shadow:var(--shadow)}.card--narrow{max-width:440px;margin:0 auto;width:100%}.card__header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:20px;flex-wrap:wrap}.card__title{margin:0;font-size:1.15rem}.card__subtitle{margin:4px 0 0;color:var(--text-muted);font-size:.88rem}.card__actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.section-title{margin:24px 0 10px;font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted)}.btn{--btn-bg: transparent;--btn-fg: var(--text);--btn-border: var(--border-strong);display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;border:1px solid var(--btn-border);border-radius:var(--radius);padding:10px 16px;background:var(--btn-bg);color:var(--btn-fg);font-weight:600;font-size:.92rem;box-shadow:0 1px 2px #0003;transition:background .15s ease,border-color .15s ease,transform .12s ease,box-shadow .15s ease}.btn:hover:not(:disabled){border-color:var(--accent);transform:translateY(-1px);box-shadow:0 6px 16px -8px #00000073}.btn:hover:not(:disabled):not(.btn--primary):not(.btn--danger):not(.btn--ghost){--btn-bg: color-mix(in srgb, var(--accent) 10%, transparent)}.btn:active:not(:disabled){transform:translateY(1px);box-shadow:none}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{--btn-bg: linear-gradient(135deg, var(--mark-x), var(--accent));--btn-fg: #04070d;--btn-border: transparent;box-shadow:0 8px 20px -9px color-mix(in srgb,var(--accent) 80%,transparent)}.btn--primary:hover:not(:disabled){--btn-bg: linear-gradient(135deg, var(--mark-x), var(--accent-strong));border-color:transparent;box-shadow:0 10px 24px -8px color-mix(in srgb,var(--accent) 90%,transparent)}.btn--danger{--btn-fg: var(--danger);--btn-border: color-mix(in srgb, var(--danger) 45%, transparent)}.btn--danger:hover:not(:disabled){--btn-bg: color-mix(in srgb, var(--danger) 14%, transparent);--btn-border: var(--danger)}.btn--ghost{--btn-border: transparent;--btn-fg: var(--text-muted);padding:6px 10px;font-weight:500}.btn--ghost:hover:not(:disabled){--btn-fg: var(--text)}.btn--block{width:100%}.btn__icon{font-size:1.05em;line-height:1}.btn__spinner{width:14px;height:14px;border:2px solid currentcolor;border-right-color:transparent;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.field{margin-bottom:16px}.field__label{display:block;margin-bottom:6px;font-size:.85rem;font-weight:600;color:var(--text-muted)}.field__input-wrap{position:relative}.field__input{width:100%;padding:11px 14px;border-radius:var(--radius);border:1px solid var(--border-strong);background:var(--bg-sunken);outline:none;transition:border-color .15s ease}.field__input-wrap--trailing .field__input{padding-right:40px}.field__trailing{position:absolute;inset:0;pointer-events:none}.field__trailing .btn{pointer-events:auto;padding:4px 6px;font-size:1.05rem;line-height:1}.field__input:hover{border-color:var(--accent)}.field__input--invalid{border-color:var(--danger)}.field__hint,.field__error{margin:6px 0 0;font-size:.8rem}.field__hint{color:var(--text-muted)}.field__error{color:var(--danger)}.auth-links{display:flex;justify-content:center;gap:8px;margin-top:12px;flex-wrap:wrap}.join-form{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:start;margin-top:16px}.join-form .field{margin-bottom:0}.join-form .btn{margin-top:25px}.alert{margin:16px 0 0;padding:11px 14px;border-radius:var(--radius);border:1px solid;font-size:.88rem}.alert--info{color:var(--text);border-color:var(--border-strong);background:var(--bg-sunken)}.alert--success{color:var(--success);border-color:color-mix(in srgb,var(--success) 40%,transparent);background:color-mix(in srgb,var(--success) 10%,transparent)}.alert--error{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 40%,transparent);background:color-mix(in srgb,var(--danger) 10%,transparent)}.empty-state{color:var(--text-muted);text-align:center;padding:24px 0;margin:0}.spinner{display:inline-flex;padding:16px 0;justify-content:center;width:100%}.spinner__dot{width:22px;height:22px;border:2px solid var(--accent);border-right-color:transparent;border-radius:50%;animation:spin .7s linear infinite}.code-block{background:var(--bg-sunken);border:1px solid var(--border);border-radius:var(--radius);padding:14px;overflow-x:auto;font-size:.85rem}.lobby{display:flex;flex-direction:column;gap:20px}.lobby__columns{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;align-items:start}.mode-actions{display:flex;flex-direction:column;gap:10px}.option-grid{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.option{flex:1 1 140px;display:flex;flex-direction:column;gap:3px;align-items:flex-start;padding:12px 14px;border-radius:var(--radius);border:1px solid var(--border-strong);background:var(--bg-sunken);cursor:pointer;text-align:left;transition:border-color .15s ease,background .15s ease}.option--compact{flex:1 1 60px;align-items:center;font-weight:600}.option:hover{border-color:var(--accent)}.option--active{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,transparent)}.option__label{font-weight:600}.option__description{font-size:.8rem;color:var(--text-muted)}.room-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.room-list__item{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-sunken)}.room-list__code{display:block;font-weight:700;letter-spacing:.12em;font-family:ui-monospace,SFMono-Regular,monospace}.room-list__meta{font-size:.8rem;color:var(--text-muted)}.room-list__actions{display:flex;gap:8px;flex-shrink:0}.seats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}.seat{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-sunken);transition:border-color .2s ease}.seat--active{border-color:var(--accent);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 40%,transparent)}.seat__mark{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;font-weight:800;background:var(--bg-elevated)}.seat__mark[data-mark=X]{color:var(--mark-x)}.seat__mark[data-mark=O]{color:var(--mark-o)}.seat__name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.match-status{margin-bottom:12px}.turn-chip{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;background:var(--bg-sunken);border:1px solid var(--border-strong);font-size:.9rem;font-weight:600}.turn-chip--thinking:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--warning);animation:pulse 1s ease-in-out infinite}@keyframes pulse{50%{opacity:.25}}.connection{font-size:.78rem;padding:4px 10px;border-radius:999px;border:1px solid var(--border-strong);color:var(--text-muted)}.connection--live{color:var(--success);border-color:color-mix(in srgb,var(--success) 40%,transparent)}.connection--offline{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 40%,transparent)}.invite{margin-bottom:16px;padding:14px;border:1px dashed var(--border-strong);border-radius:var(--radius)}.invite p{margin:0 0 10px;color:var(--text-muted);font-size:.88rem}.invite__code{display:flex;align-items:center;gap:12px}.invite__code strong{font-size:1.5rem;letter-spacing:.2em;font-family:ui-monospace,SFMono-Regular,monospace}.match-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.match-page{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:center;gap:20px}.match-page>.card{flex:0 1 auto;max-width:100%}.match-page__chat{flex:0 0 300px;max-width:100%;display:flex;flex-direction:column}.chat-log{list-style:none;margin:0 0 12px;padding:8px;height:261px;overflow-y:auto;overscroll-behavior:contain;display:flex;flex-direction:column;gap:6px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-sunken);scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}.chat-log::-webkit-scrollbar{width:6px}.chat-log::-webkit-scrollbar-track{background:transparent}.chat-log::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:999px}.chat-log::-webkit-scrollbar-thumb:hover{background:var(--accent)}.chat-log__item{display:flex;gap:6px;padding:6px 10px;border-radius:var(--radius-sm);background:var(--bg-elevated);font-size:.9rem}.chat-log__item--mine{align-self:flex-end;background:color-mix(in srgb,var(--accent) 16%,var(--bg-elevated))}.chat-log__sender{font-weight:600;color:var(--text-muted)}.chat-log__item--mine .chat-log__sender{color:var(--accent-strong)}.chat-composer{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:start}.chat-composer .field{margin-bottom:0}.chat-composer>.btn{margin-top:25px}.emoji-toggle{position:relative;height:100%;display:flex;align-items:center;justify-content:flex-end;padding-right:2px}.emoji-picker{position:absolute;bottom:calc(100% + 8px);right:0;z-index:20;pointer-events:auto;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;padding:8px;width:min(216px,100%);background:var(--bg-elevated);border:1px solid var(--border-strong);border-radius:var(--radius);box-shadow:var(--shadow)}.emoji-picker button{min-width:0;border:none;background:transparent;border-radius:var(--radius-sm);padding:4px;font-size:1.2rem;line-height:1;cursor:pointer}.emoji-picker button:hover{background:var(--bg-sunken)}.board-viewport{overflow:auto;padding:4px;margin:0 -4px;overscroll-behavior:contain}.board{--cell-size: clamp( 20px, min( calc((min(100vw, 1080px) - 120px) / var(--board-size)), calc((100dvh - 280px) / var(--board-size)) ), 56px );display:grid;grid-template-columns:repeat(var(--board-size),var(--cell-size));gap:2px;padding:8px;width:max-content;margin:0 auto;background:var(--border);border-radius:var(--radius);border:1px solid var(--border-strong)}.board--locked{opacity:.85}.cell{width:var(--cell-size);height:var(--cell-size);display:grid;place-items:center;padding:0;border:none;border-radius:3px;background:var(--bg-sunken);color:var(--text);font-size:calc(var(--cell-size) * .62);font-weight:700;line-height:1;cursor:pointer;transition:background .12s ease}.cell:hover:not(:disabled):not([aria-disabled]){background:color-mix(in srgb,var(--accent) 22%,var(--bg-sunken))}.cell:disabled{cursor:default}.cell[aria-disabled]{cursor:default}.cell--x{color:var(--mark-x)}.cell--o{color:var(--mark-o)}.cell--last{box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--accent) 65%,transparent)}.cell--winning{background:color-mix(in srgb,var(--success) 28%,var(--bg-sunken));animation:pop .3s ease}@keyframes pop{0%{transform:scale(.82)}}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.9rem}thead th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border-strong);color:var(--text-muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;white-space:nowrap}tbody td{padding:11px 12px;border-bottom:1px solid var(--border);white-space:nowrap}.result-badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.78rem;font-weight:600;border:1px solid}.result-badge--win{color:var(--success);border-color:color-mix(in srgb,var(--success) 40%,transparent)}.result-badge--loss{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 40%,transparent)}.result-badge--draw{color:var(--text-muted);border-color:var(--border-strong)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media (max-width: 560px){.seats,.join-form{grid-template-columns:1fr}.join-form .btn{margin-top:0}}