:root{color-scheme:light;--paper: #f4f0e6;--paper-deep: #e7e0cf;--surface: #fffdf7;--ink: #172522;--muted: #58635f;--forest: #1e4b42;--forest-dark: #143a33;--gold: #d9aa45;--gold-soft: #f4dfae;--coral: #b8553f;--line: #d9d3c4;--shadow: 0 22px 60px rgba(37, 48, 43, .12);--radius-lg: 24px;--radius-md: 14px;font-family:Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif;background:var(--paper);color:var(--ink)}html{scroll-behavior:smooth}body{margin:0;min-width:320px;background:var(--paper);line-height:1.75}button,textarea,select{font:inherit}button,summary,.dropzone{-webkit-tap-highlight-color:transparent}button:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible,.dropzone:focus-within{outline:3px solid rgba(184,85,63,.38);outline-offset:3px}.site-header,main,footer{width:min(1120px,calc(100% - 40px));margin-inline:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:26px 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0;color:var(--muted);font-size:14px}.status{min-height:1.75em;margin:0;color:var(--forest);font-size:14px;font-weight:700}.result-actions{display:flex;align-items:center;gap:14px;margin-top:14px}.copy-button{min-width:104px;padding:9px 14px;border:1px solid var(--forest);background:transparent;color:var(--forest)}.copy-button:hover,.copy-button.copied{background:var(--forest);color:#fff}.copy-button:disabled{opacity:.42;cursor:not-allowed;background:transparent;color:var(--forest)}.result-copy{min-height:48px}.alternatives{margin-top:14px;border-top:1px solid var(--line)}.alternatives summary{padding:14px 2px 8px;cursor:pointer;color:var(--muted);font-size:14px;font-weight:700}.alternate-list{display:flex;gap:8px;flex-wrap:wrap;padding:4px 0 2px}.alternate-button{padding:8px 11px;border:1px solid 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0;font-size:14px;font-weight:700}.warning.safe{color:#347155}.warning.danger{color:var(--coral)}.guide{display:grid;grid-template-columns:.85fr 1.4fr;gap:60px;margin-bottom:90px}.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.guide-grid article{padding:24px;border-top:3px solid var(--forest);background:#ffffff6b}.guide-grid article+article{border-top-color:var(--coral)}.guide-kicker{margin:0 0 14px;font-size:14px;font-weight:800;letter-spacing:.08em}.guide-kicker.good{color:var(--forest)}.guide-kicker.bad{color:var(--coral)}.guide-grid h3{margin:0 0 10px;font-size:17px}.guide-grid article>p:last-child{margin:0;color:var(--muted);font-size:14px}.faq{max-width:820px;margin-bottom:90px}.faq h2{margin-bottom:24px}.faq details{border-top:1px solid var(--line)}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{padding:18px 4px;cursor:pointer;font-weight:800}.faq details p{margin:-5px 0 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28px,1120px)}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important}}:root{--shogi-green:#172c26;--shogi-green-2:#25483c;--shogi-gold:#d5a94e;--board:#d9ae68;--board-dark:#8d5f2a;--paper:#f5f0e5;--ink:#17201d;--muted:#66716c;--line:#d8d1c4}*{box-sizing:border-box}.shogi-page{margin:0;background:var(--paper);color:var(--ink);font-family:Yu Gothic,Hiragino Kaku Gothic ProN,sans-serif}.site-header{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:auto;padding:20px 28px}.brand{display:flex;align-items:center;gap:11px;color:inherit;text-decoration:none}.brand-mark{display:grid;place-items:center;width:39px;height:39px;border-radius:50%;background:var(--shogi-green);color:#fff;font:900 21px Georgia,serif}.brand b,.brand small{display:block}.brand b{font:900 14px/1.1 ui-monospace,monospace;letter-spacing:.12em}.brand small{margin-top:3px;color:var(--muted);font-size:14px}.mini-nav{display:flex;gap:22px}.mini-nav a{color:var(--muted);font-size:14px;font-weight:800;text-decoration:none}.shogi-page main{max-width:1180px;margin:auto;padding:0 28px}.shogi-hero{padding:48px 0 34px}.eyebrow{margin:0 0 7px;color:var(--shogi-gold);font:900 14px ui-monospace,monospace;letter-spacing:.18em}.shogi-hero h1{margin:0;color:var(--shogi-green);font:900 clamp(48px,7vw,78px)/1 serif;letter-spacing:.05em}.shogi-hero>p:last-child{margin:14px 0 0;color:var(--muted);font-size:15px;font-weight:700}.shogi-app{overflow:hidden;border:1px solid #c5bba8;border-radius:18px;background:#fffdf8;box-shadow:0 24px 65px #2f26151f}.game-settings{display:flex;align-items:end;gap:14px;padding:16px 20px;border-bottom:1px solid #c7bda9;background:var(--shogi-green)}.game-settings label{display:grid;gap:5px;color:#dce6e1;font-size:14px;font-weight:800}.game-settings select{min-width:150px;padding:9px 34px 9px 10px;border:1px solid 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#3f2b16;background:var(--board)}.shogi-board.is-disabled{opacity:.72}.shogi-board.is-disabled .board-square{cursor:wait}.board-square{position:relative;display:grid;place-items:center;aspect-ratio:1;padding:3px;border:0;border-right:1px solid #49321a;border-bottom:1px solid #49321a;background:transparent;cursor:pointer}.board-square:hover{background:#fff7bb47}.board-square.is-target{background:#fff9b275}.board-square.is-target:after{content:"";position:absolute;width:25%;height:25%;border-radius:50%;background:#315a4b;opacity:.72}.board-square.is-selected{background:#ffec7494;box-shadow:inset 0 0 0 3px #315a4b}.board-square.is-last{box-shadow:inset 0 0 0 3px #a93023b3}.piece{position:relative;z-index:1;display:grid;place-items:center;width:82%;height:88%;padding-top:9%;clip-path:polygon(50% 0,92% 17%,100% 100%,0 100%,8% 17%);background:linear-gradient(145deg,#f3cf8e,#d59c4f);box-shadow:inset 0 0 0 1px #54311066;color:#15130f;font:900 clamp(15px,3.2vw,30px)/1 serif;text-shadow:0 1px 0 #f8dda8}.piece.is-opponent{transform:rotate(180deg)}.piece.is-promoted{color:#a2261c}.hand{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:5px;min-height:40px}.hand-piece{display:flex;align-items:center;gap:3px;min-width:36px;padding:5px 7px;border:1px solid #9c7b50;border-radius:5px;background:#f5d89b;color:#1f1a12;cursor:pointer;font:900 17px serif}.hand-piece small{color:#58452f;font:800 10px sans-serif}.hand-piece.is-selected{outline:3px solid #315a4b;background:#ffedaf}.hand-piece:disabled{cursor:default;opacity:.85}.game-status{width:min(100%,650px);min-height:24px;margin:8px 0 0;color:var(--shogi-green);font-size:14px;font-weight:900;text-align:center}.game-sidebar{display:flex;min-width:0;flex-direction:column;padding:22px 18px;background:#fff}.turn-card{display:grid;grid-template-columns:1fr auto;gap:4px 12px;padding:15px;border-radius:10px;background:#edf1ee}.turn-card small{grid-column:1/-1;color:var(--muted);font-size:14px}.turn-card 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p{margin:0;color:var(--muted);font-size:14px;line-height:1.8}.shogi-faq{max-width:780px;margin:0 auto 80px}.shogi-faq h2{font-size:22px}.shogi-faq details{border-top:1px solid var(--line)}.shogi-faq details:last-child{border-bottom:1px solid var(--line)}.shogi-faq summary{padding:17px 2px;cursor:pointer;font-size:14px;font-weight:900}.shogi-faq p{margin:-4px 0 18px;color:var(--muted);font-size:14px;line-height:1.8}.promotion-dialog,.result-dialog{border:0;border-radius:16px;background:#fffdf7;box-shadow:0 28px 80px #00000047}.promotion-dialog::backdrop,.result-dialog::backdrop{background:#111b1794}.promotion-dialog form,.result-dialog form{min-width:270px;padding:18px;text-align:center}.promotion-dialog p{font-weight:900}.promotion-dialog div,.result-dialog div{display:grid;grid-template-columns:1fr 1fr;gap:8px}.promotion-dialog button,.result-dialog button{padding:11px;border:1px solid #9ba9a2;border-radius:7px;background:#fff;cursor:pointer;font-weight:900}.promotion-dialog button:first-child,.result-dialog button:last-child{border-color:var(--shogi-green);background:var(--shogi-green);color:#fff}.result-dialog span{display:grid;place-items:center;width:62px;height:62px;margin:0 auto;border-radius:50%;background:var(--shogi-gold);color:#fff;font:900 29px serif}.result-dialog h2{margin:13px 0 5px}.result-dialog p{margin:0 0 18px;color:var(--muted);font-size:14px}.shogi-page footer{display:flex;align-items:flex-end;justify-content:space-between;padding:32px max(28px,calc((100vw - 1124px)/2));background:var(--shogi-green);color:#fff}.shogi-page footer b{font:900 14px ui-monospace,monospace}.shogi-page footer p{margin:5px 0 0;color:#b7c5bf;font-size:14px}.shogi-page footer nav{display:flex;gap:18px}.shogi-page footer a{color:#dce5e1;font-size:14px;text-decoration:none}@media(max-width:880px){.game-layout{grid-template-columns:1fr}.game-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:12px}.turn-card,.game-actions{margin:0}.move-history{grid-column:1/-1;margin-top:8px}.move-history ol{max-height:180px}.engine-note{grid-column:1/-1;margin-top:0}.shogi-info{grid-template-columns:1fr}.shogi-info article+article{border-top:1px solid var(--line);border-left:0}}@media(max-width:620px){.site-header{padding:17px 15px}.mini-nav{display:none}.shogi-page main{padding:0 10px}.shogi-hero{padding:28px 7px 23px}.shogi-hero h1{font-size:52px}.board-column{padding:12px 7px 18px}.board-frame{padding:4px;border-width:3px}.piece{font-size:clamp(13px,6vw,25px)}.player-row{min-height:52px}.game-sidebar{grid-template-columns:1fr;padding:16px 12px}.move-history,.engine-note{grid-column:1}.shogi-info{margin:48px 0}.shogi-page footer{display:grid;gap:20px;padding:28px 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