:root{color-scheme:dark;--bg: #141819;--bg2: #1a2021;--panel: #202728;--panel-raised: #293233;--panel-border: #3c4849;--control-border: #738180;--text: #f2f1e9;--muted: #b3bdb9;--accent: #dfc397;--accent-ink: #25251e;--accent2: #b5d3a7;--danger: #ffaba3;--focus: #f3d6a1;--light-sq: #e5d9c3;--dark-sq: #85715e;--coord-light: #443a2d;--coord-dark: #ffffff;--radius-sm: 8px;--radius: 14px;--radius-lg: 20px;--shadow: 0 16px 40px #00000026;--font: "Segoe UI", "Malgun Gothic", system-ui, sans-serif;--mono: "Cascadia Mono", Consolas, "Segoe UI", monospace;--ease: cubic-bezier(.2, .7, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}html{min-width:280px;min-height:100%;scrollbar-gutter:stable}body{min-height:100vh;min-height:100svh;padding:28px 32px 48px;background:radial-gradient(ellipse at 20% 0,#27302c55,transparent 52%),var(--bg);color:var(--text);font-family:var(--font);font-size:14px;line-height:1.55;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,input,select,a{-webkit-tap-highlight-color:transparent}button{min-height:42px;padding:9px 14px;border:1px solid var(--control-border);border-radius:var(--radius-sm);background:var(--bg2);color:var(--text);font-weight:600;line-height:1.35;cursor:pointer;transition:background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease),box-shadow .16s var(--ease),transform .16s var(--ease)}button:active:not(:disabled){transform:translateY(1px)}button:disabled,input:disabled,select:disabled{opacity:.48;cursor:not-allowed}input,select{min-width:0;min-height:42px;max-width:100%;padding:9px 11px;border:1px solid var(--control-border);border-radius:var(--radius-sm);background:var(--bg2);color:var(--text);line-height:1.4;transition:border-color .16s var(--ease),box-shadow .16s var(--ease)}input::placeholder{color:var(--muted);opacity:1}select{cursor:pointer;padding-right:26px}input[type=checkbox]{width:18px;height:18px;min-height:18px;flex:0 0 18px;padding:0;accent-color:var(--accent2)}:where(button,input,select,a,[tabindex]):focus-visible{outline:3px solid var(--focus);outline-offset:3px;box-shadow:0 0 0 6px var(--bg)}::selection{background:var(--accent);color:var(--accent-ink)}*{scrollbar-width:thin;scrollbar-color:#75847d var(--bg2)}::-webkit-scrollbar{width:7px;height:7px}::-webkit-scrollbar-track{background:var(--bg2)}::-webkit-scrollbar-thumb{background:#75847d;border-radius:8px}.hidden{display:none!important}header{max-width:1120px;margin:0 auto 28px;padding-bottom:24px;border-bottom:1px solid var(--panel-border);display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{flex-shrink:0;font-size:26px;font-weight:750;line-height:1.2;letter-spacing:-.8px}.brand span{display:block;padding:7px 0 0 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var(--bg);border-radius:10px;background:#af3c51;color:#fff;font-size:10px;font-weight:750;line-height:1}main{display:grid;grid-template-columns:minmax(0,1fr) 352px;align-items:start;gap:28px;max-width:1120px;margin:0 auto}.board-wrap{position:relative;min-width:0;display:flex;flex-direction:column;gap:14px}#board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));grid-template-rows:repeat(8,minmax(0,1fr));width:100%;aspect-ratio:1;overflow:hidden;border:8px solid #343d38;border-radius:12px;box-shadow:0 0 0 1px #62706480,0 20px 56px #00000040;container-type:inline-size;user-select:none;-webkit-user-select:none;touch-action:manipulation}.sq{position:relative;display:flex;align-items:center;justify-content:center;min-width:0;min-height:0;cursor:pointer;isolation:isolate}.sq.light{background:var(--light-sq)}.sq.dark{background:var(--dark-sq)}.sq:after{content:"";position:absolute;inset:0;z-index:0;pointer-events:none}.sq.last:after{background:#ecd26460;box-shadow:inset 0 -3px 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12px;font-size:18px}.react-float{position:absolute;bottom:20%;z-index:30;font-size:30px;pointer-events:none;animation:reactRise linear forwards}@keyframes reactRise{0%{opacity:0;transform:translateY(0) scale(.7)}15%{opacity:1;transform:translateY(-12px) scale(1)}to{opacity:0;transform:translateY(-150px)}}#board.shake{animation:boardShake .4s}@keyframes boardShake{20%{transform:translate(-4px)}40%{transform:translate(4px)}60%{transform:translate(-3px)}80%{transform:translate(3px)}}:is(#promotion-modal,#offer-modal,#result-banner,#auth-modal,#dm-modal,#lobby-modal,#rank-modal,#games-modal,#friends-modal){position:fixed;inset:0;display:flex;align-items:center;justify-content:center;overflow-y:auto;overscroll-behavior:contain;padding:24px;background:#090d0fbd;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}#promotion-modal{z-index:40}#result-banner{z-index:44}#offer-modal{z-index:45}#auth-modal{z-index:46}#dm-modal,#lobby-modal,#rank-modal,#games-modal,#friends-modal{z-index:47}:is(.promo-card,.offer-card,.result-card,.auth-card,.dm-card,.list-modal){width:100%;max-width:440px;max-height:calc(100vh - 48px);max-height:calc(100dvh - 48px);overflow-y:auto;border:1px solid #63716a;border-radius:var(--radius-lg);background:var(--panel);box-shadow:0 32px 100px #00000070;animation:popIn .2s var(--ease) both}@keyframes popIn{0%{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}.promo-card,.offer-card,.result-card,.auth-card{padding:28px;text-align:center}.promo-card h3,.offer-card h3,.auth-card h3{margin-bottom:20px;font-size:20px;font-weight:650;letter-spacing:-.4px}.offer-card p,.result-card p{margin-bottom:24px;color:var(--muted);line-height:1.7;overflow-wrap:anywhere}.offer-btns,.result-btns{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.offer-btns button,.result-btns button{flex:1 1 110px}.result-card{max-width:480px;padding-block:36px}.result-card h2{margin-bottom:10px;color:var(--accent2);font-size:clamp(22px,4vw,30px);font-weight:700;letter-spacing:-.8px;line-height:1.4}.promo-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:24px}.promo-btn{display:flex;align-items:center;justify-content:center;min-width:0;min-height:64px;padding:6px;border-radius:12px;background:var(--light-sq)}.promo-btn .piece{font-size:clamp(38px,7vw,48px)}#promo-cancel,.modal-close{min-width:100px;background:transparent;color:var(--muted)}#confetti{position:fixed;inset:0;z-index:60;pointer-events:none}.toast{position:fixed;z-index:50;top:22px;left:50%;max-width:calc(100vw - 32px);padding:13px 22px;border:1px solid var(--accent);border-radius:12px;background:var(--panel-raised);color:var(--text);box-shadow:0 12px 36px #0005;font-size:13px;font-weight:600;text-align:center;overflow-wrap:anywhere;opacity:0;pointer-events:none;transform:translate(-50%) translateY(-8px);transition:opacity .18s var(--ease),transform .18s var(--ease)}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.auth-card{max-width:380px}.auth-tabs{display:flex;gap:4px;padding:4px;margin-bottom:18px;border:1px solid var(--panel-border);border-radius:10px;background:var(--bg2)}.auth-tabs button{flex:1;border-color:transparent;background:transparent;color:var(--muted)}.auth-tabs 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48px));overflow:hidden}.dm-header,.list-header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex:0 0 auto;min-height:68px;padding:14px 20px;border-bottom:1px solid var(--panel-border);font-size:15px;font-weight:650}.dm-x{flex:0 0 38px;min-width:38px;min-height:38px;padding:8px;border-color:transparent;background:transparent;color:var(--muted)}.dm-body{display:flex;flex:1;min-height:0}.dm-inbox{flex:0 0 200px;overflow-y:auto;padding:8px;border-right:1px solid var(--panel-border)}.dm-item{position:relative;padding:12px 10px;margin-bottom:4px;border:1px solid transparent;border-radius:var(--radius-sm);cursor:pointer}.dm-item.active{border-color:var(--accent);background:#dfc39712}.dm-item-name{padding-right:22px;font-size:13px;font-weight:650;overflow-wrap:anywhere}.dm-item-preview{margin-top:4px;overflow:hidden;color:var(--muted);font-size:12px;text-overflow:ellipsis;white-space:nowrap}.dm-item-badge{top:10px;right:8px;border-color:var(--panel)}.dm-thread-wrap{display:flex;flex:1;flex-direction:column;min-width:0}.dm-to-row,.dm-send-row{display:flex;align-items:center;gap:8px;padding:12px}.dm-to-row{border-bottom:1px solid var(--panel-border)}.dm-send-row{border-top:1px solid var(--panel-border)}.dm-to-row input,.dm-send-row input{flex:1 1 0;width:0;font-size:13px}.dm-to-row button,.dm-send-row button{flex:0 0 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16px;color:var(--muted);font-size:13px;line-height:1.8;text-align:center}.lobby-row,.game-row,.friend-row{padding:14px;margin-bottom:8px;border:1px solid var(--panel-border);border-radius:10px;background:var(--bg2)}.lobby-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.lobby-info{display:flex;flex-direction:column;gap:4px;min-width:0}.lobby-code{color:var(--accent);font-family:var(--mono);font-size:17px;font-weight:700;letter-spacing:2px}.lobby-meta,.game-meta{color:var(--muted);font-size:12px;overflow-wrap:anywhere}.lobby-join{flex:0 0 auto}.rank-head,.rank-row{display:grid;grid-template-columns:44px minmax(0,1fr) 108px 66px;gap:8px;align-items:center;padding:12px 14px}.rank-head{flex:0 0 auto;margin-inline:12px;border-bottom:1px solid var(--panel-border);color:var(--muted);font-size:11px}.rank-head span:last-child{text-align:right}.rank-row{border-bottom:1px solid 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