:root{--bg: #111827;--card: #1f2937;--fg: #f3f4f6;--muted: #9ca3af;--accent: #f59e0b;--green: #10b981;--red: #ef4444;--yellow: #f59e0b}*{box-sizing:border-box}html,body{margin:0;min-height:100vh;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,sans-serif}#app{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.card{width:100%;max-width:360px;background:var(--card);border-radius:16px;padding:24px;box-shadow:0 10px 30px #0006}.title{margin:0 0 16px;font-size:20px;text-align:center}.badge{display:inline-block;font-size:12px;padding:4px 10px;border-radius:999px;margin-bottom:16px}.badge-connecting{background:#f59e0b33;color:var(--yellow)}.badge-open{background:#10b98133;color:var(--green)}.badge-closed{background:#ef444433;color:var(--red)}.label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.input{width:100%;padding:12px;font-size:16px;border-radius:10px;border:1px solid #374151;background:#111827;color:var(--fg);margin-bottom:16px}.input:focus{outline:none;border-color:var(--accent)}.btn{width:100%;padding:12px;font-size:16px;font-weight:600;border:none;border-radius:10px;background:var(--accent);color:#111827;cursor:pointer}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:transparent;color:var(--muted);border:1px solid #374151}.change-name{display:block;width:fit-content;margin:10px 0 0 auto;padding:2px;background:none;border:none;color:#60a5fa;font-size:12px;cursor:pointer}.change-name:hover{text-decoration:underline}.msg{font-size:15px;margin:8px 0 16px}.note{font-size:12px;color:var(--muted);margin:12px 0 0}.spinner{width:36px;height:36px;margin:8px auto 16px;border:4px solid #374151;border-top-color:var(--accent);border-radius:50%;animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.matched-title{font-size:18px;font-weight:700;color:var(--green);text-align:center}.matched-info{background:#111827;border-radius:10px;padding:12px 16px;margin:8px 0}.kv{display:flex;justify-content:space-between;padding:6px 0}.kv+.kv{border-top:1px solid #374151}.kv-key{color:var(--muted);font-size:13px}.kv-val{font-weight:600}.game{width:100%;max-width:440px;margin:0 auto;padding:8px;display:flex;flex-direction:column;gap:8px}.turnbar{display:flex;align-items:center;justify-content:center;gap:10px;padding:8px}.turnbar-main{font-size:15px;color:var(--muted)}.turnbar-main.is-mine{color:var(--green);font-weight:700}.badge-check{background:var(--red);color:#fff;font-size:12px;font-weight:700;padding:2px 8px;border-radius:6px}.board-layout{display:flex;flex-direction:column;align-items:center}.file-labels{display:grid;grid-template-columns:repeat(9,1fr);width:min(92vw,420px);padding-right:18px}.board-row{display:flex;align-items:stretch}.board-grid{display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);width:min(92vw,420px);aspect-ratio:1 / 1;background:#d9a86a;border:2px solid #5a3a1a}.rank-labels{display:flex;flex-direction:column;width:18px}.coord{display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--muted)}.rank-labels .coord{flex:1}.cell{position:relative;border:.5px solid #8a5a2a;display:flex;align-items:center;justify-content:center;cursor:default;min-width:0;min-height:0;overflow:hidden}.cell.is-target{cursor:pointer}.cell.is-last{background:#f59e0b47}.cell.is-selected{background:#10b98159}.cell .piece{font-size:min(5.2vw,24px);font-weight:700;line-height:1;-webkit-user-select:none;user-select:none;color:#1a1a1a}.cell .piece.opp{transform:rotate(180deg);color:#3a2a2a}.dot{position:absolute;width:26%;height:26%;border-radius:50%;background:#10b9818c;pointer-events:none}.hand{display:flex;align-items:center;gap:8px;background:var(--card);border-radius:8px;padding:6px 10px;min-height:40px}.hand-label{font-size:12px;color:var(--muted);min-width:110px}.hand-pieces{display:flex;flex-wrap:wrap;gap:6px;flex:1}.hand-piece{position:relative;display:inline-flex;align-items:center;padding:2px 4px;border-radius:6px;cursor:pointer;background:#d9a86a}.hand-piece .piece{font-size:18px;font-weight:700;color:#1a1a1a}.hand-piece.is-selected{outline:2px solid var(--green)}.hand-count{font-size:11px;color:#5a3a1a;margin-left:1px}.hand-empty{font-size:12px;color:var(--muted)}.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%);background:var(--red);color:#fff;padding:10px 18px;border-radius:8px;font-size:14px;box-shadow:0 6px 20px #0006;z-index:20}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:30}.overlay-panel{background:var(--card);border-radius:12px;padding:20px;width:240px}.overlay-title{text-align:center;font-size:16px;margin-bottom:16px}.overlay-btns{display:flex;gap:10px}.overlay-btns .btn{flex:1}.game-footer{display:flex;justify-content:center;padding:4px 0 8px}.game-footer .btn{width:auto;padding:8px 24px}.result-outcome{text-align:center;font-size:24px;font-weight:800;margin-bottom:8px}.result-win{color:var(--green)}.result-lose{color:var(--red)}.result-draw{color:var(--muted)}.result-reason{text-align:center;font-size:14px;color:var(--muted);margin-bottom:18px}