:root{--bg: #f4f1ea;--bg-elevated: #fffdf8;--ink: #241f18;--ink-muted: #6d6355;--line: #ded5c5;--land: #e8dfc9;--land-alt: #e0d5ba;--water: #a7d0e4;--water-line: #7fb4cf;--trap: #e9c8a2;--den: #cbb2e0;--red: #c0392b;--red-soft: #f6dcd8;--black: #2f4f7a;--black-soft: #d9e2ef;--accent: #2f7d4f;--accent-ink: #ffffff;--select: #f2c14e;--last-move: rgba(47, 125, 79, .28);--danger: #b23c2f;--radius: 12px;--shadow: 0 2px 8px rgba(0, 0, 0, .12);color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--bg: #16181c;--bg-elevated: #212429;--ink: #ebe6dd;--ink-muted: #9a9285;--line: #33373e;--land: #4a4436;--land-alt: #423d31;--water: #24506b;--water-line: #336c8f;--trap: #6d5233;--den: #4f3d68;--red: #e2685a;--red-soft: #4a2622;--black: #7ba3d8;--black-soft: #22314a;--accent: #46a86b;--accent-ink: #10210f;--select: #d8a72f;--last-move: rgba(70, 168, 107, .32);--danger: #e2685a;--shadow: 0 2px 10px rgba(0, 0, 0, .45)}}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-text-size-adjust:100%;overscroll-behavior:none}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.screen{min-height:100dvh;max-width:560px;margin:0 auto;padding:env(safe-area-inset-top) 12px calc(env(safe-area-inset-bottom) + 12px);display:flex;flex-direction:column;gap:10px}.screen--game{justify-content:space-between;padding-top:10px}.screen--menu{justify-content:center;gap:20px;padding-top:24px}.menu__header{text-align:center}.menu__title{margin:0;font-size:clamp(1.6rem,7vw,2.2rem);display:flex;flex-direction:column;gap:6px;letter-spacing:-.02em}.menu__subtitle{margin:6px 0 0;color:var(--ink-muted);font-size:.95rem}.field{border:0;margin:0;padding:0}.field__legend{padding:0 0 8px;font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-muted)}.field__hint{margin:8px 2px 0;font-size:.82rem;color:var(--ink-muted)}.segmented{display:flex;gap:6px;background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius);padding:5px}.segmented__btn{flex:1;min-height:44px;border:0;border-radius:8px;background:transparent;color:var(--ink);font:inherit;font-weight:600;cursor:pointer;transition:background .15s ease,color .15s ease}.segmented__btn.is-active{background:var(--accent);color:var(--accent-ink)}.menu__actions{display:flex;flex-direction:column;gap:10px}.rules{background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;font-size:.85rem;color:var(--ink-muted)}.rules summary{cursor:pointer;font-weight:600;color:var(--ink)}.rules ul{margin:10px 0 0;padding-left:18px;display:flex;flex-direction:column;gap:6px}.btn{min-height:44px;padding:0 18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elevated);color:var(--ink);font:inherit;font-weight:600;cursor:pointer}.btn:disabled{opacity:.45;cursor:default}.btn--primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn--large{min-height:52px;font-size:1.05rem}.status{display:flex;flex-direction:column;gap:6px}.status__row{display:flex;align-items:center;justify-content:space-between;gap:10px}.status__turn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:1.05rem}.status__turn--thinking{color:var(--accent)}.status__meta{font-size:.8rem;color:var(--ink-muted);white-space:nowrap}.status__row--captured{gap:12px;font-size:.78rem}.captured{display:flex;align-items:center;gap:6px;min-width:0}.captured__label{color:var(--ink-muted);white-space:nowrap}.captured__list{display:flex;flex-wrap:wrap;gap:1px;font-size:.95rem;line-height:1}.captured__none{color:var(--ink-muted)}.status__warning,.status__error{margin:0;font-size:.8rem;color:var(--danger)}.spinner{width:14px;height:14px;border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.board-wrap{display:flex;justify-content:center;min-height:0;flex:1}.board{display:grid;grid-template-columns:repeat(7,1fr);grid-template-rows:repeat(9,1fr);gap:2px;aspect-ratio:7 / 9;width:100%;max-width:min(100%,calc(100dvh - 210px) * 7 / 9);max-height:100%;padding:6px;background:var(--line);border-radius:var(--radius);box-shadow:var(--shadow);touch-action:manipulation}.square{position:relative;display:flex;align-items:center;justify-content:center;border:0;padding:0;border-radius:4px;background:var(--land);cursor:pointer;font:inherit;min-width:0;min-height:0;transition:background .12s ease,box-shadow .12s ease}.square:nth-child(2n){background:var(--land-alt)}.square:disabled{cursor:default}.square--water,.square--water:nth-child(2n){background:var(--water);box-shadow:inset 0 0 0 1px var(--water-line)}.square--trap,.square--trap:nth-child(2n){background:var(--trap)}.square--den,.square--den:nth-child(2n){background:var(--den)}.square--trap:after,.square--den:after{content:"△";position:absolute;inset:0;display:grid;place-items:center;font-size:.9rem;color:#00000059;pointer-events:none}.square--den:after{content:"⌂";font-size:1.3rem}.square--from{box-shadow:inset 0 0 0 2px var(--last-move)}.square--to{box-shadow:inset 0 0 0 3px var(--last-move)}.square--selected{box-shadow:inset 0 0 0 3px var(--select)}.square--shake{animation:shake .28s ease}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-3px)}75%{transform:translate(3px)}}.piece{position:relative;display:grid;place-items:center;width:84%;height:84%;border-radius:50%;border:2px solid currentColor;line-height:1;z-index:1}.piece--red{color:var(--red);background:var(--red-soft)}.piece--black{color:var(--black);background:var(--black-soft)}.piece--black{border-radius:22%}.piece__glyph{font-size:clamp(.9rem,4.6vw,1.5rem);filter:saturate(1.05)}.piece__rank{position:absolute;right:-2px;bottom:-3px;min-width:14px;height:14px;padding:0 3px;border-radius:7px;background:currentColor;color:var(--bg-elevated);font-size:10px;font-weight:700;line-height:14px;text-align:center}.piece--mine{box-shadow:0 0 0 2px #00000014,var(--shadow)}.controls{display:flex;gap:10px}.controls .btn{flex:1}.modal-backdrop{position:fixed;inset:0;display:grid;place-items:center;padding:20px;background:#0000008c;z-index:10}.modal{width:100%;max-width:340px;background:var(--bg-elevated);border-radius:16px;padding:22px;box-shadow:var(--shadow);text-align:center}.modal__title{margin:0 0 8px;font-size:1.5rem}.modal__title--win{color:var(--accent)}.modal__title--loss{color:var(--danger)}.modal__reason{margin:0 0 18px;color:var(--ink-muted);font-size:.92rem}.modal__actions{display:flex;flex-direction:column;gap:8px}@media(min-width:700px)and (min-height:700px){.board{max-width:min(440px,calc(100dvh - 230px) * 7 / 9)}}@media(prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}