@import"https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@400;700;900&family=Noto+Serif+JP:wght@400;700;900&display=swap";:root{--cell-size: 48px;--board-edge: #3f2a14;--cell-bg-start: #f6e2be;--cell-bg-end: #e8c889;--line: rgba(80, 50, 20, .9);--font: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif}.board-title{text-align:center}.board-wrapper{display:flex;justify-content:center;padding:8px}.shogi-board-container{display:inline-block;padding:8px;background:linear-gradient(180deg,var(--cell-bg-start),var(--cell-bg-end));border:8px solid var(--board-edge);border-radius:6px;box-shadow:0 6px 18px #100a052e}.shogi-board{border-collapse:collapse;table-layout:fixed;background:transparent}.shogi-board td.cell{width:var(--cell-size);height:var(--cell-size);padding:0;margin:0;text-align:center;vertical-align:middle;border:1px solid var(--line);font-family:var(--font);font-weight:900;font-size:18px;color:#0f0906;-webkit-user-select:none;user-select:none;box-sizing:border-box;background:linear-gradient(180deg,#ffffff05,#00000005);overflow:hidden;cursor:pointer;transition:background-color .2s ease}.shogi-board td.cell.selected{background-color:#64c8644d;border:2px solid #4ade80}.shogi-board td.cell.in-check{background-color:#ef44444d;border:2px solid #ef4444;animation:checkPulse 1.5s ease-in-out infinite}@keyframes checkPulse{0%,to{box-shadow:0 0 #ef4444b3}50%{box-shadow:0 0 0 8px #ef444400}}.shogi-piece{width:calc(var(--cell-size) * .9);height:calc(var(--cell-size) * .9);max-width:100%;max-height:100%;object-fit:contain;display:block;margin:0 auto;pointer-events:none;transform-origin:50% 50%;transform:scaleX(1.12);will-change:transform}.shogi-piece.piece-rotated{transform:rotate(180deg) scaleX(1.12)}.shogi-board-container.board-rotated{transform:rotate(180deg)}.shogi-piece.piece-rotated-back{transform:rotate(180deg) scaleX(1.12)}.shogi-piece.piece-rotated.piece-rotated-back{transform:rotate(360deg) scaleX(1.12)}.shogi-board tr:first-child td.cell{border-top-width:2px}.shogi-board tr:last-child td.cell{border-bottom-width:2px}.shogi-board tr td:first-child{border-left-width:2px}.shogi-board tr td:last-child{border-right-width:2px}@media (max-width: 768px){:root{--cell-size: 36px}.shogi-board td.cell{font-size:14px}.shogi-piece{transform:scaleX(1.06)}.shogi-piece.piece-rotated{transform:rotate(180deg) scaleX(1.06)}.shogi-board-container{padding:4px;border:6px solid var(--board-edge)}}@media (max-width: 480px){:root{--cell-size: 32px}.shogi-board td.cell{font-size:12px}.shogi-board-container{padding:4px;border:4px solid var(--board-edge)}}.stand-section{width:120px;height:calc(var(--cell-size, 48px) * 9 + 32px);display:flex;margin:0!important;padding-left:0!important;padding-right:0!important}@media (max-width: 768px){.stand-section{width:100%;max-width:calc(var(--cell-size, 36px) * 9 + 16px);height:auto;min-height:calc(var(--cell-size, 36px) * .9 + 8px);padding:4px 8px;align-items:flex-start}.stand-section.stand-top,.stand-section.stand-bottom{justify-content:center;align-items:flex-start}.stand-pieces-list{flex-direction:row;justify-content:center;align-items:center;width:100%;gap:6px;margin:0}}.stand-section.stand-top{align-items:flex-start;justify-content:flex-end;padding-top:8px}.stand-section.stand-bottom{align-items:flex-end;justify-content:flex-start;padding-top:8px}.stand-pieces-list{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.stand-top .stand-pieces-list{align-content:flex-start}.stand-bottom .stand-pieces-list{align-content:flex-end}.stand-piece-item{position:relative;display:inline-block;cursor:pointer;transition:all .2s}.stand-piece-image{width:calc(var(--cell-size, 48px) * .9);height:calc(var(--cell-size, 48px) * .9);object-fit:contain;display:block;transform:scaleX(1.12)}.stand-piece-image.piece-rotated{transform:rotate(180deg) scaleX(1.12)}.stand-piece-count{position:absolute;bottom:-2px;right:-2px;font-size:10px;font-weight:700;color:#333;background-color:#ffffffe6;border-radius:50%;min-width:16px;height:16px;display:flex;align-items:center;justify-content:center;padding:2px;box-shadow:0 1px 3px #0003}.stand-piece-item.top-player .stand-piece-count{top:-2px;left:-2px;bottom:auto;right:auto}.stand-piece-item.selected .stand-piece-image{filter:drop-shadow(0 0 4px #22c55e)}.stand-piece-item.disabled{cursor:default;opacity:.5}.turn-indicator{display:inline-flex;align-items:center;justify-content:center;padding:8px 24px;background-color:#333;color:#fff;border-radius:20px;font-size:16px;font-weight:500;box-shadow:0 2px 8px #0000001a}.turn-label{letter-spacing:.5px}*{font-family:"Noto Serif JP",serif}.app-container{text-align:center;min-height:100vh;background:#fafafa;position:relative}.game-layout{display:flex;align-items:flex-start;justify-content:center;gap:0px;margin:20px auto}@media (max-width: 768px){.game-layout{flex-direction:column;align-items:center;gap:0px;margin:10px auto}}.player-info-toast{position:fixed;top:80px;left:50%;transform:translate(-50%);color:#fff;background-color:#333;text-align:center;padding:12px 24px;border-radius:8px;box-shadow:0 4px 12px #00000026;z-index:1000;animation:slideDown .3s ease-out;font-size:16px}.error-message{position:fixed;top:20px;left:50%;transform:translate(-50%);color:#fff;background-color:#d32f2f;text-align:center;padding:12px 24px;border-radius:8px;max-width:400px;box-shadow:0 4px 12px #00000026;z-index:1000;animation:slideDown .3s ease-out}.check-message{position:fixed;top:80px;left:50%;transform:translate(-50%);color:#fff;background-color:#333;text-align:center;padding:12px 24px;border-radius:8px;box-shadow:0 4px 12px #00000026;z-index:1000;animation:slideDown .3s ease-out;font-size:16px}@keyframes slideDown{0%{opacity:0;transform:translate(-50%) translateY(-10px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.selected-piece-message{color:#333;background-color:#fff;text-align:center;padding:12px 20px;border:1px solid #333;border-radius:4px;margin:16px auto;max-width:400px}.promote-dialog-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.promote-dialog-content{background:#fff;padding:32px;border-radius:8px;box-shadow:0 4px 20px #00000026;min-width:300px}.promote-dialog-title{margin-top:0;margin-bottom:24px;font-size:20px;font-weight:600;color:#333}.promote-dialog-buttons{display:flex;gap:12px}.promote-button{flex:1;padding:12px 24px;font-size:16px;font-weight:500;cursor:pointer;background-color:#333;color:#fff;border:none;border-radius:4px;transition:background-color .2s}.promote-button:hover{background-color:#555}.no-promote-button{flex:1;padding:12px 24px;font-size:16px;font-weight:500;cursor:pointer;background-color:#fff;color:#333;border:1px solid #ddd;border-radius:4px;transition:all .2s}.no-promote-button:hover{background-color:#f5f5f5;border-color:#333}.game-over-message{font-size:18px;margin-bottom:24px;color:#333}.replay-button{width:100%}.mode-selector{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:32px;background:#fafafa}.mode-selector h1{margin-bottom:64px;font-size:72px;color:#1a1a1a;font-weight:400;letter-spacing:8px}.mode-buttons{display:flex;gap:24px;flex-wrap:wrap;justify-content:center}.mode-button{display:flex;flex-direction:column;align-items:center;gap:12px;padding:48px 64px;font-size:22px;font-weight:400;cursor:pointer;background:#fff;color:#1a1a1a;border:1px solid #e0e0e0;border-radius:0;transition:all .3s ease;letter-spacing:2px;width:300px}.mode-button:hover{border-color:#1a1a1a;transform:translateY(-4px);box-shadow:0 8px 16px #0000001a}.mode-description{font-size:13px;font-weight:400;color:#666;letter-spacing:1px}.back-button{position:absolute;top:20px;left:20px;padding:8px 16px;font-size:14px;cursor:pointer;background-color:#fff;color:#333;border:1px solid #ddd;border-radius:4px;transition:all .2s ease;z-index:100}.back-button:hover{border-color:#333}.game-container{text-align:center;padding-top:50px;min-height:100vh;background:#fafafa}.game-container h1{font-size:32px;color:#1a1a1a;font-weight:400;margin-bottom:32px;letter-spacing:4px}.player-info{margin:20px auto;padding:16px 24px;background:#fff;border:1px solid #ddd;border-radius:4px;max-width:400px}.player-info p{margin:4px 0;color:#333;font-size:14px}.waiting-message{margin:20px auto;padding:12px 20px;background-color:transparent;color:#999;max-width:400px;font-size:14px}.peer-connection{margin:24px auto;max-width:500px}.peer-link{margin-bottom:32px;padding-bottom:32px;border-bottom:1px solid #eee}.peer-id-text{margin-bottom:12px;font-size:14px;color:#666}.peer-input{display:flex;gap:12px;align-items:center}.peer-input-field{flex:1;padding:10px 16px;font-size:14px;border:1px solid #ddd;border-radius:4px;transition:border-color .2s}.peer-input-field:focus{outline:none;border-color:#333}.peer-button{padding:10px 20px;font-size:14px;font-weight:500;cursor:pointer;background-color:#333;color:#fff;border:none;border-radius:4px;transition:background-color .2s;white-space:nowrap}.peer-button:hover{background-color:#555}.peer-button:disabled{background-color:#ddd;color:#999;cursor:not-allowed}:root{--kanji-font: "Shippori Mincho", "Noto Serif JP", "Hiragino Mincho ProN", serif}body{margin:0;padding:0;background:#f9fafb;color:#111827;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial}.app-container{display:flex;flex-direction:column;align-items:center;gap:16px;padding:18px}h1{text-align:center;margin:0;font-family:var(--kanji-font)}.centered-section{text-align:center}.kanji-font{font-family:var(--kanji-font)}