*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
:root{color-scheme:dark}
html,body{margin:0;min-height:100%;background:#100e0c;color:#f7ead7;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
body{touch-action:manipulation}
.app{width:min(100%,720px);margin:0 auto;padding:18px 14px 28px}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;padding:4px 2px 14px}
.eyebrow{font-size:10px;letter-spacing:3px;color:#a98b68;font-weight:800}
h1{margin:2px 0 4px;font-family:"STKaiti","KaiTi","Songti SC",serif;font-size:32px;line-height:1.1;color:#fff4e5}
.status{font-size:14px;color:#d6a05e}
button{font:inherit;font-weight:700;color:#f8ead7;background:#2b211b;border:1px solid #6f5034;border-radius:10px;cursor:pointer}
button:active{transform:translateY(1px)}
.primary{padding:10px 14px;background:linear-gradient(#735034,#4d3524);border-color:#a87849}
.panel{background:linear-gradient(145deg,#211a16,#181311);border:1px solid #493426;border-radius:15px;padding:10px;margin-bottom:12px;box-shadow:0 8px 25px #0004}
.row{display:flex;align-items:center;gap:5px;flex-wrap:wrap}
.row+.row{margin-top:8px}
.label{font-size:13px;color:#bfa991;font-weight:800;margin:0 3px 0 2px}
.seg{padding:8px 12px;font-size:13px}
.seg.active{background:linear-gradient(#b9783d,#8e592f);border-color:#d89b59;color:#fff}
.difficulty-label{margin-left:9px}
.hidden{display:none}
.board-wrap{width:min(100%,620px);margin:0 auto;background:#4a2d18;padding:7px;border-radius:12px;box-shadow:0 18px 45px #0008}
#board{display:block;width:100%;height:auto;border-radius:7px;background:#d5a260}
.toolbar{text-align:center;padding:12px 0 6px}
.toolbar button{padding:9px 17px;margin:0 3px}
.message{text-align:center;min-height:22px;color:#d9b788;font-size:14px}
.rules{text-align:center;color:#786b60;font-size:11px;margin-top:5px;line-height:1.5}
@media(max-width:430px){.app{padding:12px 10px 22px}.topbar{padding-bottom:10px}h1{font-size:28px}.primary{padding:9px 11px}.seg{padding:7px 9px;font-size:12px}.label{font-size:12px}.panel{padding:9px}.difficulty-label{margin-left:4px}}