:root{--bg:#0b1622;--panel-bg:#ffffff0a;--panel-bdr:#ffffff17;--gold:#f0c040;--teal:#2ecfad;--orange:#f07828;--red:#e85040;--cell-lt:#c8b882;--cell-dk:#5e4a30;--cell-lt-h:#d8cca0;--cell-dk-h:#7a6040;--text:#ddd4c8;--muted:#8a7d72;--sz:clamp(36px, min(11vw, 9vh), 68px);--psz:calc(var(--sz) * .79);--focus:#ffd060}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{background:var(--bg);color:var(--text);background-image:radial-gradient(60% 50% at 15% 60%,#0a2846e6 0%,#0000 70%),radial-gradient(50% 60% at 85% 20%,#0a322db3 0%,#0000 65%);flex-direction:column;align-items:center;gap:10px;min-height:100vh;padding:14px 10px 24px;font-family:Georgia,Times New Roman,serif;display:flex}.skip-link{color:var(--gold);z-index:999;background:#000;padding:6px 10px;position:absolute;top:0;left:-9999px}.skip-link:focus{top:8px;left:8px}header{text-align:center}header h1{letter-spacing:5px;color:var(--gold);text-shadow:0 0 24px #f0c04059;font-size:clamp(1.8rem,5vw,2.4rem);font-weight:400}header p{letter-spacing:3px;text-transform:uppercase;color:var(--muted);margin-top:2px;font-size:.72rem}#status{background:var(--panel-bg);border:1px solid var(--panel-bdr);text-align:center;border-radius:10px;width:100%;max-width:580px;padding:10px 20px}#turn-line{color:var(--gold);font-size:clamp(.95rem,3vw,1.1rem);font-weight:400}#instr-line{color:#a89c92;min-height:1.2em;margin-top:4px;font-size:clamp(.72rem,2.3vw,.85rem);line-height:1.4}#scores{gap:14px;display:flex}.sbox{background:var(--panel-bg);border:1px solid var(--panel-bdr);text-align:center;border-radius:8px;min-width:110px;padding:6px 16px;transition:border-color .25s,box-shadow .25s}.sbox.active{border-color:var(--gold);box-shadow:0 0 10px #f0c0402e}.sbox-label{color:var(--muted);text-transform:uppercase;letter-spacing:1px;justify-content:center;align-items:center;gap:6px;font-size:.7rem;display:flex}.dot{border-radius:50%;flex-shrink:0;width:12px;height:12px;display:inline-block}.dot-black{background:radial-gradient(circle at 38% 38%,#555,#111);border:1.5px solid #444}.dot-white{background:radial-gradient(circle at 38% 38%,#fff,#ddd);border:1.5px solid #bbb}.sbox-num{color:var(--text);margin-top:1px;font-size:1.5rem}#board-outer{flex-direction:column;align-items:flex-start;display:flex}.col-row{margin-bottom:2px;margin-left:18px;display:flex}.clabel{width:var(--sz);text-align:center;color:#6a5e54;letter-spacing:1px;font-size:.62rem}.board-wrap{display:flex}.row-col{flex-direction:column;margin-right:2px;display:flex}.rlabel{height:var(--sz);color:#6a5e54;justify-content:center;align-items:center;width:16px;font-size:.62rem;display:flex}#board{grid-template-columns:repeat(8, var(--sz));grid-template-rows:repeat(8, var(--sz));border:3px solid #2a1e10;border-radius:3px;display:grid;overflow:hidden;box-shadow:0 0 32px #0000008c,0 0 64px #00000047}.cell{width:var(--sz);height:var(--sz);cursor:default;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;outline:none;justify-content:center;align-items:center;transition:background-color .12s;display:flex;position:relative}.cell.lt{background:var(--cell-lt)}.cell.dk{background:var(--cell-dk)}.cell.clickable{cursor:pointer}.cell.clickable.lt:hover{background:var(--cell-lt-h)}.cell.clickable.dk:hover{background:var(--cell-dk-h)}.cell:focus-visible{box-shadow:inset 0 0 0 3px var(--focus);z-index:5}.cell.hl-setup:after{content:"";border:3px solid var(--teal);pointer-events:none;z-index:3;background:#2ecfad38;border-radius:50%;animation:1.4s ease-in-out infinite ring-pulse;position:absolute;inset:3px;box-shadow:0 0 12px #2ecfad99}.cell.hl-move:before{content:"";border:2px solid var(--teal);z-index:1;background:#2ecfad61;border-radius:50%;width:38%;height:38%;animation:1.2s ease-in-out infinite dot-pulse;position:absolute}.cell.hl-multi:before{content:"";border:2px solid var(--orange);z-index:1;background:#f078286b;border-radius:50%;width:38%;height:38%;animation:1s ease-in-out infinite dot-pulse;position:absolute}@keyframes ring-pulse{0%,to{opacity:.6}50%{opacity:1}}@keyframes dot-pulse{0%,to{opacity:.65;transform:scale(1)}50%{opacity:1;transform:scale(1.12)}}.piece{width:var(--psz);height:var(--psz);z-index:2;pointer-events:none;border-radius:50%;transition:transform .14s,box-shadow .14s;position:relative}.p-black{background:radial-gradient(circle at 36% 34%,#4a4a4a,#141414 62%);border:2px solid #2e2e2e;box-shadow:2px 3px 7px #000000a6,inset 1px 1px 4px #ffffff14}.p-white{background:radial-gradient(circle at 36% 34%,#fff,#e8e2d8 62%);border:2px solid #c0bab0;box-shadow:2px 3px 7px #0006,inset 1px 1px 4px #ffffffb3}.piece-sel{transform:scale(1.09)translateY(-2px);box-shadow:0 0 0 3px var(--gold), 0 0 14px #f0c0408c, 2px 3px 7px #00000080!important}.cell.can-pick .piece:not(.piece-sel){box-shadow:0 0 0 3px var(--gold), 0 0 0 5px #140c00d9, 0 0 14px #f0c040b3, 2px 3px 7px #0000008c;animation:1.6s ease-in-out infinite pick-pulse}@keyframes pick-pulse{0%,to{box-shadow:0 0 0 3px var(--gold), 0 0 0 5px #140c00d9, 0 0 10px #f0c04073, 2px 3px 7px #0000008c}50%{box-shadow:0 0 0 3px var(--gold), 0 0 0 5px #140c00d9, 0 0 20px #f0c040f2, 2px 3px 7px #0000008c}}.piece.capturing{z-index:4;animation:.32s ease-out forwards piece-capture}@keyframes piece-capture{0%{opacity:1;filter:brightness();transform:scale(1)}35%{filter:brightness(1.4) drop-shadow(0 0 8px var(--red));transform:scale(1.18)}to{opacity:0;transform:scale(.05)}}.piece.arriving{animation:.22s ease-out piece-arrive}@keyframes piece-arrive{0%{opacity:.4;transform:scale(.7)}to{opacity:1;transform:scale(1)}}.piece.moving{z-index:10;transition:transform .28s cubic-bezier(.32,.72,.4,1.1)}.sbox-num.bump{animation:.32s ease-out num-bump}@keyframes num-bump{0%{color:var(--text);transform:scale(1)}50%{color:var(--gold);transform:scale(1.35)}to{color:var(--text);transform:scale(1)}}#controls{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:4px;display:flex}button{cursor:pointer;letter-spacing:.5px;border:none;border-radius:7px;padding:9px 20px;font-family:Georgia,serif;font-size:.85rem;transition:transform .15s,box-shadow .15s,background .15s,opacity .15s}button:hover:not(:disabled){transform:translateY(-1px)}button:focus-visible{outline:2px solid var(--focus);outline-offset:2px}button:disabled{opacity:.4;cursor:not-allowed}#btn-end{color:#fff;background:linear-gradient(135deg,#e87020,#d05010);box-shadow:0 2px 10px #e6702059}#btn-end:hover:not(:disabled){background:linear-gradient(135deg,#f08030,#e06020);box-shadow:0 4px 14px #e6702073}#btn-end[hidden]{display:none!important}#btn-undo{color:#fff;background:linear-gradient(135deg,#6080a0,#405070);box-shadow:0 2px 10px #50648c47}#btn-undo:hover:not(:disabled){background:linear-gradient(135deg,#7090b0,#506080)}#btn-new{color:#fff;background:linear-gradient(135deg,#28c8a0,#18a080);box-shadow:0 2px 10px #28c8a047}#btn-new:hover:not(:disabled){background:linear-gradient(135deg,#38d8b0,#28b090);box-shadow:0 4px 14px #28c8a061}#btn-rules{color:#9a8e84;background:0 0;border:1px solid #ffffff29}#btn-rules:hover{color:#bbb;border-color:#ffffff4d}#rules-panel{background:var(--panel-bg);border:1px solid var(--panel-bdr);color:#b9ada1;border-radius:8px;width:100%;max-width:580px;padding:16px 22px;font-size:.82rem;line-height:1.7}#rules-panel[hidden]{display:none}#rules-panel h3{color:var(--gold);letter-spacing:1px;margin-bottom:8px;font-size:.95rem;font-weight:400}#rules-panel h3:not(:first-child){margin-top:12px}#rules-panel p{margin-bottom:6px}#rules-panel strong{color:#d8d2c5}#rules-panel em{color:var(--teal);font-style:normal}.overlay{-webkit-backdrop-filter:blur(5px);z-index:200;background:#000000b8;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.overlay[hidden]{display:none}.dialog{text-align:center;background:linear-gradient(150deg,#1a2a3c,#0d1824);border:1px solid #f0c04047;border-radius:16px;flex-direction:column;align-items:center;gap:12px;max-width:420px;padding:32px 40px;display:flex;box-shadow:0 0 48px #0000008c,0 0 90px #f0c04014}.dialog h2{color:var(--gold);letter-spacing:2px;font-size:clamp(1.4rem,5vw,2rem);font-weight:400}.dialog p{color:#b0a498;font-size:.9rem;line-height:1.5}#modal-stone{border-radius:50%;width:56px;height:56px}#modal-stone.black{background:radial-gradient(circle at 36% 34%,#555,#111);border:2px solid #444;box-shadow:3px 5px 12px #0009}#modal-stone.white{background:radial-gradient(circle at 36% 34%,#fff,#e8e2d8);border:2px solid #c0bab0;box-shadow:3px 5px 12px #00000061}.dialog-buttons{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:6px;display:flex}#btn-again,.dialog-primary{background:linear-gradient(135deg, var(--gold), #c8a028);color:#1a1000;padding:12px 28px;font-size:.95rem;font-weight:700;box-shadow:0 3px 14px #f0c04059}#btn-again:hover,.dialog-primary:hover{background:linear-gradient(135deg,#ffd060,#dab030);box-shadow:0 5px 20px #f0c04073}.dialog-secondary{color:#aaa;background:0 0;border:1px solid #fff3;padding:12px 24px}.dialog-secondary:hover{color:#ddd;border-color:#ccc}#mode-line{color:#7a6e64;letter-spacing:1px;text-transform:uppercase;min-height:1em;margin-top:4px;font-size:.7rem}#mode-line.error{color:var(--orange);text-transform:none;letter-spacing:.5px;font-size:.85rem;line-height:1.4}.dialog-wide{text-align:left;align-items:stretch;width:100%;max-width:540px}.dialog-wide h2{text-align:center}#mode-warning{text-align:center;color:var(--orange);margin:-4px 0 8px;font-size:.88rem}#mode-form{flex-direction:column;gap:10px;max-height:60vh;margin:4px 0;padding:2px 4px;display:flex;overflow-y:auto}.mode-fieldset{border:1px solid var(--panel-bdr);border-radius:8px;flex-direction:column;gap:6px;padding:10px 12px 8px;display:flex}.mode-fieldset legend{color:var(--gold);letter-spacing:1px;text-transform:uppercase;padding:0 6px;font-size:.85rem}.mode-fieldset.mode-ai[disabled]{opacity:.45;pointer-events:none}.mode-color-legend{margin-top:6px}.radio{cursor:pointer;border-radius:6px;align-items:flex-start;gap:8px;padding:6px 4px;transition:background .15s;display:flex}.radio:hover{background:#ffffff0a}.radio input[type=radio]{accent-color:var(--gold);cursor:pointer;margin-top:4px}.radio-label{flex-direction:column;gap:2px;display:flex}.radio-title{color:var(--text);font-size:1rem}.radio-desc{color:var(--muted);font-size:.85rem;line-height:1.45}.muted{color:var(--muted);font-size:.85em}#btn-mode-cancel[hidden]{display:none}.board-wrap{position:relative}.thinking{-webkit-backdrop-filter:blur(2px);z-index:50;pointer-events:auto;background:#0b16228c;border-radius:6px;justify-content:center;align-items:center;gap:12px;display:flex;position:absolute;inset:0}.thinking[hidden]{display:none}.thinking-text{color:var(--gold);letter-spacing:1px;font-size:clamp(.85rem,2.6vw,1rem)}.thinking-spinner{border:3px solid #f0c04040;border-top-color:var(--gold);border-radius:50%;width:24px;height:24px;animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@media (max-width:480px){body{gap:6px;padding:8px 4px 16px}#scores{gap:8px}.sbox{min-width:88px;padding:4px 10px}.sbox-num{font-size:1.2rem}.col-row{margin-left:14px}.rlabel{width:12px}}