:root{color-scheme:dark;--bg:#0b1422;--panel:#142338;--line:#334963;--ink:#edf3fa;--muted:#b0c1d3;--gold:#ffd17a;--blue:#83c8ff;--red:#ffb0a0}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,Segoe UI,sans-serif}button,input,textarea{font:inherit}button{border:1px solid var(--line);border-radius:9px;padding:10px 15px;background:#1b3049;color:var(--ink);cursor:pointer;min-height:44px;touch-action:manipulation}button:hover{border-color:var(--gold)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--gold);outline-offset:3px}button:disabled{cursor:default;opacity:.75}button[hidden]{display:none}a{color:var(--gold)}.primary{background:var(--gold);border-color:var(--gold);color:#182132;font-weight:800}.mast{max-width:1040px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;border-bottom:1px solid var(--line)}.brand{text-decoration:none;font-size:13px;font-weight:850;letter-spacing:.1em}.flag-mark{color:var(--gold);font-size:25px;margin-right:8px}.badge,.eyebrow{font-size:11px;letter-spacing:.16em;color:var(--gold);font-weight:750}.badge{color:var(--muted)}.hero{max-width:900px;margin:24px auto;padding:0 16px;text-align:center}h1{font-size:clamp(26px,5vw,42px);line-height:1.15;letter-spacing:-.035em;margin:8px 0}h2{line-height:1.25;margin-top:2em}h3{line-height:1.4}.lede{margin:12px 0 20px;color:var(--muted)}.stage{position:relative;width:100%;height:700px;max-height:85svh;min-height:520px;background:var(--panel);border:1px solid var(--line);border-radius:18px;overflow:hidden}.stage iframe{display:block;width:100%;height:100%;border:0}.cover,.loader{position:absolute;inset:0;align-items:center;justify-content:center;flex-direction:column;padding:18px}.cover{display:flex;background:radial-gradient(ellipse at 50% 35%,#294664 0,#142338 65%)}.cover-board{display:grid;grid-template-columns:repeat(6,1fr);width:min(100%,330px);gap:5px;transform:rotate(-5deg);margin:20px 0 35px}.cover-board span{display:grid;place-items:center;aspect-ratio:1;border:1px solid #47617c;border-radius:6px;background:#1d354e;color:var(--blue);font-size:24px;font-weight:800}.cover-board span:nth-child(-n+6){color:var(--red);background:#3e2d35}.cover-label{font-size:12px;letter-spacing:.14em}.loader{display:none;background:var(--panel);gap:20px}.stage[data-gf-state=loading] .cover,.stage[data-gf-state=playing] .cover{display:none}.stage[data-gf-state=loading] .loader{display:flex}.stage[data-gf-state=playing] .loader{display:none}.march{display:flex;gap:10px}.march i{display:block;width:22px;height:30px;background:var(--gold);border-radius:5px;animation:march 900ms ease-in-out infinite alternate}.march i:nth-child(2){animation-delay:150ms}.march i:nth-child(3){animation-delay:300ms}@keyframes march{to{transform:translateY(-14px);opacity:.5}}.actions{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;padding:14px 0}.actions [aria-pressed=true]{color:var(--gold);border-color:var(--gold)}.reading{max-width:740px;margin:38px auto;padding:0 20px;overflow-wrap:anywhere}.reading p,.reading li{color:#cbd8e6}.reading table{width:100%;border-collapse:collapse;font-size:14px}.reading th,.reading td{padding:9px;border-bottom:1px solid var(--line);text-align:left}label{display:block;margin:12px 0}input,textarea{display:block;width:100%;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--ink);padding:10px}footer{max-width:900px;margin:40px auto 0;padding:28px 20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.small{font-size:12px;color:var(--muted);line-height:1.5}.note{border-bottom:1px solid var(--line);padding:14px 0}.note time{font-size:12px;margin-left:10px}.empty{display:none}[data-gf-empty] .empty{display:block}.game-shell{background:#0e1c2d}.game-shell #hfp-app{width:100%;max-width:620px;margin:auto;padding:14px}.game-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.game-head h1{font-size:23px}.game-head .eyebrow{margin:0}.status{border-left:3px solid var(--gold);background:var(--panel);padding:9px 12px;min-height:48px;margin:12px 0}.toolbar{display:flex;gap:6px;flex-wrap:wrap}.toolbar button{padding:8px 12px;font-size:13px}.board{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:5px;width:min(100%,460px);margin:14px auto;padding:6px;border:1px solid var(--line);border-radius:12px;background:#08111d}.cell{position:relative;aspect-ratio:1;min-height:0;padding:0;border-radius:6px;border:1px solid #2a415c;font-size:clamp(19px,5vw,29px);font-weight:800;line-height:1}.cell.light{background:#192b42}.cell.dark{background:#15253a}.cell.human{background:#143f5b;color:var(--blue);border-color:#4b83ac}.cell.ai{background:#4a303b;color:var(--red);border-color:#9f6570}.cell:disabled{opacity:1}.cell.selected{outline:3px solid var(--gold);outline-offset:-3px}.cell.target{box-shadow:inset 0 0 0 3px #89e0b5}.cell.target:after{content:'';position:absolute;bottom:4px;left:calc(50% - 3px);width:6px;height:6px;border-radius:50%;background:#89e0b5}.cell small{position:absolute;font-size:10px;right:3px;top:3px;color:var(--gold)}.legend{display:flex;justify-content:center;gap:9px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.human-dot{color:var(--blue)}.ai-dot{color:var(--red)}.game-help{border-top:1px solid var(--line);padding:10px 0;font-size:13px}.game-help summary{cursor:pointer;min-height:28px}.game-help p{color:var(--muted)}#battle-log{padding-left:24px;max-height:200px;overflow:auto}#selftest{overflow-wrap:anywhere}@media(max-width:520px){.mast{padding:12px 14px}.badge{display:none}.hero{margin-top:18px;padding:0 10px}.lede{font-size:14px}.stage{height:690px;min-height:570px;max-height:none;border-radius:12px}.cover-board{max-width:270px}.game-shell #hfp-app{padding:10px}.game-head h1{font-size:20px}.game-head button{font-size:12px;padding:8px}.board{gap:4px}.status{font-size:13px}.reading{padding:0 16px}}@media(prefers-reduced-motion:reduce){.march i{animation:none}.cover-board{transform:none}}