@charset "UTF-8";
:root{color-scheme:light;--ink:#193d3b;--muted:#6c7972;--paper:#f7f5ee;--line:#dfe3d9;--accent:#b5673f;--mint:#e3ebe1;--serif:"Yu Mincho","Hiragino Mincho ProN","Noto Serif CJK JP",serif;font-family:"Yu Gothic",Meiryo,system-ui,sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{margin:0;min-width:280px;background:radial-gradient(ellipse at 15% 0%,#e5ede4 0,transparent 50%),var(--paper)}button,input,summary{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;touch-action:manipulation;border:1px solid var(--line);border-radius:12px;background:#fffdf7;color:var(--ink);min-height:44px;font-weight:600}button:hover{background:#edf1e8}button:active{transform:translateY(1px)}button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #b66c36;outline-offset:3px}button:disabled{cursor:default;opacity:.4}button:disabled:active{transform:none}.app{width:min(100%,496px);margin:auto;padding: max(16px,env(safe-area-inset-top)) 16px max(15px,env(safe-area-inset-bottom))}.masthead{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.brand{display:flex;align-items:center;gap:13px}.brand-mark{font:700 31px var(--serif);letter-spacing:.1em;border-right:1px solid #cbd6cc;padding-right:13px}.brand>div{display:flex;flex-direction:column;gap:4px}.roman{font-size:10px;letter-spacing:.27em;font-weight:800}.tagline{font-size:10px;color:var(--muted);letter-spacing:.06em}.icon-button{border:1px solid #cbd6cc;background:transparent;width:38px;min-height:38px;border-radius:50%;font-family:Georgia,serif;font-size:20px}.status-panel{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;min-height:53px}.eyebrow{font-size:10px;letter-spacing:.14em;color:var(--muted);font-weight:700}h1{font-family:var(--serif);font-size:21px;margin:5px 0 0;font-weight:600;letter-spacing:.03em}.move-count{font:30px Georgia,serif;color:#8b958c;display:flex;gap:5px;align-items:baseline}.move-count span{font:11px system-ui}.table{border:1px solid #e0e1d4;background:#eeeede;border-radius:15px;padding:12px 10px 8px;box-shadow:0 12px 36px #1d383707}.player{display:flex;align-items:center;gap:9px;padding:0 3px}.avatar{height:32px;width:32px;display:grid;place-items:center;font:20px var(--serif);border-radius:50%;background:#dce2d6}.human .avatar{background:var(--ink);color:#faf3db}.player strong{font-size:12px;letter-spacing:.02em}.player>div:nth-child(2){display:flex;flex-direction:column;gap:2px}.player>div>span{font-size:9px;color:var(--muted)}.player-indicator{margin-left:auto;border-radius:20px;font-size:10px;color:#77837a;background:#e4e5d8;padding:5px 9px}.player-indicator.active{background:var(--ink);color:#fff}.player-indicator.thinking{animation:breathe 1.2s ease-in-out infinite}.hand{display:flex;align-items:center;gap:3px;min-height:46px;padding:3px 2px;flex-wrap:wrap}.hand-empty{font-size:10px;letter-spacing:.1em;color:#8c9384}.opponent-hand{justify-content:flex-end;padding-top:7px}.human-hand{padding-top:6px;padding-bottom:6px;min-height:48px}.hand-piece{height:43px;min-height:43px;min-width:37px;padding:0 3px;border:none;border-radius:6px;position:relative;background:transparent;display:flex;align-items:center;gap:0}.hand-piece .piece{font-size:21px;width:28px;height:33px;filter:drop-shadow(0 1px 1px #7e532343)}.hand-piece .piece span{padding-top:3px}.hand-piece small{font-size:10px;position:absolute;right:0;bottom:1px;background:var(--ink);border-radius:7px;color:#fff;min-width:15px;padding:1px 3px}.hand-piece.selected{background:#b8d1b9;box-shadow:0 0 0 2px #527d62}.opponent-hand .piece{transform:rotate(180deg)}.opponent-hand .hand-piece{pointer-events:none}.board-frame{position:relative;padding:17px 13px 8px 6px;border-radius:5px;background:#dbb572 url('assets/kaya-wood.png') center/cover;box-shadow:0 3px 0 #a7824a,0 6px 10px #71572b20}.board{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));aspect-ratio:1/1.08;border:1px solid #765127;position:relative;background:#bc883014;isolation:isolate}.square{position:relative;display:grid;place-items:center;padding:0;min-height:0;border:0;border-bottom:1px solid #76512795;border-right:1px solid #76512795;border-radius:0;background:transparent;aspect-ratio:auto;touch-action:manipulation}.square:nth-child(9n){border-right:0}.square:nth-child(n+73){border-bottom:0}.square:hover{background:#fcf4d021}.square:active{transform:none}.square.last{background:#fffbd34d}.square.selected{background:#4c816278;box-shadow:inset 0 0 0 2px #315e45}.square.legal::after{content:"";position:absolute;width:23%;aspect-ratio:1;border-radius:100%;background:#285f4b9c;box-shadow:0 0 0 4px #f4f3d33d;z-index:3;pointer-events:none}.square.legal.capture::after{width:85%;height:88%;border-radius:5px;background:transparent;border:2px solid #396e50;box-shadow:none}.square.check{background:#c34d4269}.square.suggested{outline:3px solid #3d775b;outline-offset:-3px}.piece{position:relative;display:grid;place-items:center;width:88%;height:87%;font:700 clamp(19px,5.7vw,29px) var(--serif);color:#392b18;filter:drop-shadow(0 1.5px 1px #59361477);pointer-events:none;user-select:none;line-height:1}.piece::before{content:"";position:absolute;inset:0;clip-path:polygon(50% 0,87% 15%,100% 100%,0 100%,13% 15%);background:linear-gradient(90deg,#f8e6b698,#fff0bdcc 48%,#d6ae6c99),url('assets/kaya-wood.png') center/180px;border-bottom:2px solid #b9894d;z-index:-1}.piece span{padding-top:6px}.piece.enemy{transform:rotate(180deg)}.piece.promoted{color:#9b392a}.file-labels{position:absolute;left:6px;right:13px;top:3px;display:grid;grid-template-columns:repeat(9,1fr);text-align:center;font-size:9px;color:#77522b}.rank-labels{position:absolute;right:1px;top:17px;bottom:8px;display:grid;grid-template-rows:repeat(9,1fr);align-items:center;font-size:8px;color:#77522b}.hint{min-height:47px;display:flex;align-items:center;gap:8px;font-size:11px;line-height:1.6;padding:8px 3px;color:#5b7063}.hint-dot{flex:0 0 5px;width:5px;height:5px;border-radius:50%;background:#77987b}.controls{display:grid;grid-template-columns:1fr 1.18fr 1fr;gap:7px}.controls button{font-size:11px;min-height:44px;white-space:nowrap}.controls button span{font-size:17px;margin-right:3px;vertical-align:-1px}.record{margin-top:17px;border-top:1px solid var(--line);padding-top:12px;font-size:11px;color:var(--muted)}summary{cursor:pointer;min-height:30px}.record summary{display:flex;justify-content:space-between}.record summary::before{content:'＋';margin-right:6px}.record[open] summary::before{content:'−'}.record summary span{margin-left:auto}#moves{display:flex;flex-wrap:wrap;gap:5px 20px;padding-left:24px;max-height:150px;overflow:auto;font-size:11px}#moves li{width:85px;padding:3px}footer{font-size:9px;color:#8c978c;text-align:center;padding-top:12px;letter-spacing:.06em}footer span{margin-left:14px}dialog{border:1px solid #e4e6db;border-radius:23px;padding:26px;background:var(--paper);color:var(--ink);width:min(91vw,385px);max-height:90dvh;overflow:auto;box-shadow:0 24px 100px #0c26264a}dialog::backdrop{background:#16302a73;backdrop-filter:blur(4px)}h2{font:600 25px/1.5 var(--serif);margin:9px 0 16px}dialog p{font-size:12px;line-height:1.9;color:var(--muted)}.primary{background:var(--ink);border-color:var(--ink);color:#fffdf1}.primary:hover{background:#28534e}.full{display:block;width:100%;margin-top:10px;min-height:46px}.danger{color:#a44d36}.welcome-dialog{padding:28px 27px 20px}.intro-top{text-align:center}.intro-top .eyebrow{font-size:9px;letter-spacing:.2em}.intro-piece{width:70px;height:78px;margin:21px auto 18px;display:grid;place-items:center;background:linear-gradient(#ffebba88,#e1b86c88),url('assets/kaya-wood.png') center/cover;clip-path:polygon(50% 0,88% 17%,100% 100%,0 100%,12% 17%);font:700 44px var(--serif);color:#594025;padding-top:9px;transform:rotate(-7deg)}.intro-top h2{font-size:31px;letter-spacing:.08em;line-height:1.55;margin:0 0 12px}.intro-top p{margin:0 0 23px;font-size:11px;line-height:1.9}.welcome-dialog fieldset{border:0;margin:0;padding:0}.welcome-dialog legend{font-size:10px;letter-spacing:.08em;margin-bottom:9px;color:var(--muted)}.difficulty{display:grid;grid-template-columns:1fr 1fr;gap:10px}.difficulty input{position:absolute;opacity:0;pointer-events:none}.difficulty label{cursor:pointer;position:relative}.difficulty label>span{padding:12px 5px;display:flex;flex-direction:column;gap:4px;text-align:center;border:1px solid #cdd6c9;border-radius:11px;background:#f5f6ed}.difficulty b{font-size:13px}.difficulty small{font-size:9px;color:var(--muted)}.difficulty input:checked+span{background:#e2ebdf;border:1.5px solid #527a60;box-shadow:inset 0 0 0 1px #527a6030}.difficulty input:focus-visible+span{outline:3px solid #b66c36;outline-offset:3px}.start-button{display:flex;align-items:center;justify-content:space-between;width:100%;margin-top:16px;min-height:51px;font-size:13px;padding:0 19px}.intro-note{text-align:center;font-size:9px!important;margin-bottom:0}.promotion-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}.promotion-options button{min-height:57px}.help-steps p{border-bottom:1px solid var(--line);padding-bottom:12px}.help-steps b{color:var(--ink);display:inline-block;margin-bottom:5px}.help-note{font-size:11px!important}.rule-copy{font-size:11px}#helpDialog details{font-size:11px;margin:16px 0}a{color:#3a7357}.result-mark{font:36px var(--serif);text-align:center;margin-top:20px;color:var(--accent)}#resultDialog{text-align:center}#resultDialog .eyebrow{font-size:8px}noscript{display:block;padding:30px}@keyframes breathe{50%{opacity:.5}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}
@media(max-width:370px){.app{padding:12px 10px 16px}.masthead{margin-bottom:13px}.status-panel{margin-bottom:10px}h1{font-size:19px}.table{padding:9px 7px 6px}.hand{min-height:41px}.hand-piece{height:39px;min-height:39px}.hint{min-height:42px;font-size:10px}.record{margin-top:12px}footer{padding-top:8px}.welcome-dialog{padding:19px 22px 17px}.intro-piece{margin:15px auto}.intro-top h2{font-size:28px}.intro-top p{margin-bottom:17px}}
@media(min-width:760px){.app{padding-top:32px}.masthead{margin-bottom:25px}.table{box-shadow:0 20px 60px #16332b10}}
@media(orientation:portrait) and (max-height:750px){.app{padding-top:max(8px,env(safe-area-inset-top));padding-left:10px;padding-right:10px}.masthead{margin-bottom:8px}.brand-mark{font-size:26px}.icon-button{min-height:32px;width:32px;font-size:18px}.status-panel{min-height:37px;margin-bottom:8px}.status-panel .eyebrow{font-size:8px}h1{font-size:18px;margin-top:2px}.move-count{font-size:25px}.table{padding:8px 7px 6px}.avatar{height:24px;width:24px;font-size:17px}.player strong{font-size:10px}.player>div>span{font-size:8px}.player-indicator{padding:4px 7px;font-size:9px}.hand{min-height:32px;padding:2px}.hand-piece{height:31px;min-height:31px;min-width:36px}.hand-piece .piece{height:28px;width:25px;font-size:19px}.hand-empty{font-size:9px}.human .avatar,.human>div>span{display:none}.human{min-height:21px}.board{aspect-ratio:1}.hint{min-height:34px;font-size:10px;padding:5px 2px}.controls{position:sticky;bottom:max(6px,env(safe-area-inset-bottom));z-index:5;background:var(--paper);border-radius:12px;box-shadow:0 5px 12px var(--paper)}.record{margin-top:12px}}
@media(orientation:landscape) and (max-height:520px){.app{max-width:430px;padding-top:12px}.masthead{margin-bottom:10px}.status-panel{margin-bottom:10px}.welcome-dialog{width:min(90vw,620px)}.welcome-dialog form{display:grid;grid-template-columns:1fr 1fr;column-gap:24px;align-items:center}.intro-top{grid-row:1/4}.intro-piece{width:44px;height:48px;font-size:27px;margin:9px auto}.intro-top h2{font-size:24px}.intro-top p{margin-bottom:0}.welcome-dialog fieldset{align-self:end}.intro-note{align-self:start}.start-button{margin-top:10px}}