:root{font-family:Inter,Noto Sans JP,system-ui,sans-serif;color:#18211f;background:#f2f5f1;font-synthesis:none;--green: #287562;--green-dark: #185444;--paper: #fff;--muted: #68736f;--line: #ccd5d1;--board: #d4a65d;--board-dark: #78522f;--danger: #a33a35}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:#f2f5f1}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.42}.app-shell,.game-screen{min-height:100vh;padding:max(22px,env(safe-area-inset-top)) max(18px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(18px,env(safe-area-inset-left))}.home-screen{max-width:820px;margin:0 auto}.brand-row,.game-header{display:flex;align-items:center;justify-content:space-between;gap:20px}h1,h2,p{margin-top:0}h1{margin-bottom:0;font-size:clamp(2rem,5vw,3.4rem);letter-spacing:0;line-height:1.05}.eyebrow{margin-bottom:6px;color:var(--green);font-weight:800;font-size:.75rem;letter-spacing:.12em}.version{color:var(--muted);font-weight:700;white-space:nowrap}.home-copy{margin:34px 0 46px;color:var(--muted);font-size:1.15rem}.home-controls{display:grid;gap:16px}.home-controls h2{margin-bottom:-4px;font-size:1rem}.segmented{display:grid;grid-template-columns:repeat(3,1fr);padding:4px;background:#fff;border:1px solid var(--line);border-radius:8px}.segmented button{height:48px;border:0;background:transparent;border-radius:6px}.segmented button.active{background:var(--green);color:#fff;font-weight:800}.primary,.secondary{min-height:50px;border-radius:7px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:800}.primary{border:0;background:var(--green);color:#fff}.primary:hover{background:var(--green-dark)}.secondary{border:1px solid var(--line);background:#fff;color:#202826}.start-button{min-height:58px;font-size:1.1rem}.game-screen{max-width:1180px;margin:0 auto;padding-bottom:92px}.game-header{margin-bottom:14px}.game-header h1{font-size:clamp(1.25rem,3vw,2rem)}.turn-indicator{padding:8px 11px;border:1px solid var(--line);background:#fff;border-radius:6px;font-weight:800;white-space:nowrap}.turn-indicator.thinking{color:var(--green)}.game-layout{display:grid;grid-template-columns:minmax(320px,650px) minmax(260px,1fr);gap:24px;align-items:start}.board-column{min-width:0}.board{display:grid;grid-template-columns:repeat(9,1fr);aspect-ratio:1;width:100%;border:5px solid var(--board-dark);background:var(--board-dark);gap:1px}.square{position:relative;min-width:0;border:0;padding:0;background:var(--board);aspect-ratio:1;display:grid;place-items:center}.square.last-move{background:#efc775}.square.selected{box-shadow:inset 0 0 0 4px #16634f}.square.target:after{content:"";width:22%;aspect-ratio:1;border-radius:50%;background:#195b49b3;position:absolute}.piece{display:grid;place-items:center;width:76%;height:82%;clip-path:polygon(50% 0,92% 20%,84% 100%,16% 100%,8% 20%);background:#f2d48b;border:1px solid #6b492d;font-family:serif;font-weight:900;font-size:clamp(1rem,4.4vw,2.1rem);line-height:1;color:#17130f}.piece.opponent{transform:rotate(180deg)}.hand-row{min-height:58px;display:flex;align-items:center;gap:10px;padding:7px 10px;border:1px solid var(--line);background:#fff}.hand-label{width:38px;flex:0 0 auto;font-size:.75rem;font-weight:800;color:var(--muted)}.hand-pieces{display:flex;flex-wrap:wrap;gap:5px;min-height:42px;align-items:center}.hand-piece{position:relative;width:42px;height:45px;border:0;background:transparent;padding:0}.hand-piece.selected{outline:3px solid var(--green);background:#dceee8}.hand-piece .piece{width:36px;height:42px;font-size:1.2rem}.hand-piece small{position:absolute;right:-2px;bottom:-1px;min-width:17px;height:17px;border-radius:50%;background:var(--green);color:#fff;font-weight:800}.empty-hand{color:var(--muted);font-size:.85rem}.side-panel{display:grid;gap:14px}.position-info{padding:16px;border-left:4px solid var(--green);background:#fff}.position-info p:last-child{margin-bottom:0}.evaluation strong{color:var(--green-dark);font-size:1.2rem}.note{color:var(--muted);font-size:.9rem;line-height:1.65}.result-banner{padding:16px;border:2px solid var(--danger);background:#fff3f1;color:var(--danger)}.result-banner strong,.result-banner span{display:block}.result-banner strong{font-size:1.35rem;margin-bottom:7px}.end-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.replay-controls{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.replay-controls button{min-height:44px;border:1px solid var(--line);background:#fff;display:inline-flex;align-items:center;justify-content:center;gap:6px}.replay-controls .wide{grid-column:span 2}.bottom-actions{position:fixed;left:0;right:0;bottom:0;z-index:20;display:grid;grid-template-columns:repeat(3,1fr);padding:9px max(14px,env(safe-area-inset-right)) max(9px,env(safe-area-inset-bottom)) max(14px,env(safe-area-inset-left));border-top:1px solid var(--line);background:#fffffff5;backdrop-filter:blur(10px)}.bottom-actions button{min-height:48px;border:0;background:transparent;display:inline-flex;align-items:center;justify-content:center;gap:7px;font-weight:800}.modal-backdrop,.loading-overlay,.result-dialog-backdrop{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:22px;background:#1018157a}.dialog,.loading-panel,.result-dialog{width:min(420px,100%);padding:22px;background:#fff;border-radius:8px;box-shadow:0 18px 55px #00000038}.switch-row{min-height:54px;display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.switch-row input{width:22px;height:22px;accent-color:var(--green)}.dialog .primary,.result-dialog .primary{width:100%}.loading-panel{text-align:center}.loading-panel progress{width:100%;height:14px;accent-color:var(--green)}.loading-panel span{display:block;margin-top:7px;color:var(--muted)}.result-dialog strong{color:var(--danger);font-size:1.45rem}@media(max-width:760px){.game-screen{padding:max(12px,env(safe-area-inset-top)) 8px 90px}.game-header{align-items:flex-end}.game-header .eyebrow{display:none}.game-layout{grid-template-columns:1fr;gap:12px}.side-panel{gap:9px}.piece{font-size:clamp(.88rem,5.4vw,1.7rem)}.position-info{padding:12px}.note{display:none}}