:root{--bg:#070a12;--panel:#0c1220b8;--panel-border:#ffffff21;--text:#f8fafc;--muted:#a7b4c8;--accent:#8b5cf6;--accent-2:#22d3ee;--gold:#f8c76b;--light:#e8d8bd;--dark:#6e4b35;--board-edge:#1f2937}*{box-sizing:border-box}html{overflow-x:hidden}body{min-height:100vh;color:var(--text);background:radial-gradient(circle at 18% 12%,#8b5cf657,#0000 28rem),radial-gradient(circle at 84% 14%,#22d3ee38,#0000 26rem),radial-gradient(circle at 58% 92%,#f8c76b1f,#0000 30rem),linear-gradient(135deg,#050712 0%,#0b1020 48%,#050712 100%);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;overflow-x:hidden}button{font:inherit}.page{flex-direction:column;gap:clamp(14px,2vw,22px);width:min(1240px,100%);min-height:100vh;margin:0 auto;padding:clamp(14px,3vw,34px);display:flex}.topBar{border:1px solid var(--panel-border);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffff0e;border-radius:24px;justify-content:space-between;align-items:center;gap:16px;padding:14px 16px;display:flex;box-shadow:0 18px 60px #00000038}.eyebrow,.label{color:var(--accent-2);text-transform:uppercase;letter-spacing:.16em;margin:0 0 6px;font-size:clamp(.66rem,2vw,.76rem);font-weight:900}.topStatus{color:var(--text);margin:0;font-size:clamp(1rem,2.6vw,1.35rem);font-weight:800}.focusButton{color:var(--text);cursor:pointer;white-space:nowrap;background:linear-gradient(135deg,#8b5cf6e6,#22d3eeb8);border:1px solid #ffffff2e;border-radius:999px;padding:11px 16px;font-weight:900;box-shadow:0 14px 36px #22d3ee1f}.gameShell{flex:1;grid-template-columns:minmax(0,760px) minmax(300px,1fr);align-items:center;gap:clamp(16px,3vw,28px);display:grid}.boardFrame{background:linear-gradient(135deg,#ffffff2e,#ffffff0a),linear-gradient(135deg,#27213d,#101827 56%,#2a1c13);border:1px solid #ffffff29;border-radius:clamp(24px,4vw,42px);justify-self:center;width:min(100%,760px,100vw - clamp(28px,6vw,68px));padding:clamp(10px,1.6vw,18px);position:relative;box-shadow:0 40px 110px #0000007a,inset 0 1px #ffffff1f}.boardGlow{filter:blur(42px);opacity:.75;z-index:-1;background:linear-gradient(135deg,#8b5cf659,#22d3ee38);position:absolute;inset:8%}.board{aspect-ratio:1;border:8px solid var(--board-edge);border-radius:clamp(16px,3vw,28px);grid-template-rows:repeat(8,1fr);grid-template-columns:repeat(8,1fr);width:100%;display:grid;overflow:hidden;box-shadow:inset 0 0 0 1px #ffffff1f}.square{aspect-ratio:1;cursor:pointer;touch-action:manipulation;appearance:none;border:0;place-items:center;width:100%;min-width:0;height:100%;min-height:0;padding:0;transition:filter .12s,box-shadow .12s,transform .12s;display:grid;position:relative}.square:hover{filter:brightness(1.08)saturate(1.08)}.square:focus-visible{outline:3px solid var(--accent-2);z-index:2}.light{background:linear-gradient(135deg, #f2e5cd, var(--light))}.dark{background:linear-gradient(135deg, #7b5238, var(--dark))}.selected{box-shadow:inset 0 0 0 clamp(3px, .8vw, 6px) var(--gold), inset 0 0 26px #f8c76b47}.lastMove{box-shadow:inset 0 0 0 clamp(3px,.7vw,5px) #22d3eed1,inset 0 0 28px #22d3ee3d}.target:after{content:"";aspect-ratio:1;background:#0507126b;border-radius:999px;width:28%;position:absolute;box-shadow:0 0 0 7px #ffffff1a}.target span:not(:empty){transform:scale(1.04)}.square span{filter:drop-shadow(0 7px 3px #00000052);z-index:1;-webkit-user-select:none;user-select:none;pointer-events:none;font-size:clamp(1.45rem,8.2vw,4.8rem);line-height:1;transition:transform .12s}.whitePiece{color:#fff8ed}.blackPiece{color:#111827}.panel{background:var(--panel);border:1px solid var(--panel-border);-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);border-radius:30px;min-width:0;padding:clamp(18px,3vw,28px);box-shadow:0 28px 90px #00000052,inset 0 1px #ffffff14}.panel h2{margin:0;font-size:clamp(1.3rem,4vw,2.35rem);line-height:1.06}.gameNumber{color:var(--muted);margin:12px 0 0;font-weight:800}.modeToggle{border:1px solid var(--panel-border);background:#ffffff0f;border-radius:18px;grid-template-columns:1fr 1fr;gap:8px;margin-top:20px;padding:6px;display:grid}.modeToggle button{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:13px;padding:12px 10px;font-weight:900}.modeToggle button.activeMode{color:#07111f;background:linear-gradient(135deg,#f8fafc,#c7f9ff)}.reset{color:#07111f;background:linear-gradient(135deg, var(--gold), #fef3c7);cursor:pointer;border:0;border-radius:18px;width:100%;margin:18px 0;padding:15px 18px;font-weight:950;box-shadow:0 18px 34px #f8c76b29}.reset:hover,.modeToggle button:hover,.focusButton:hover{transform:translateY(-1px)}.notes,.history{color:var(--muted);font-size:clamp(.9rem,2.4vw,1rem);line-height:1.55}.notes{background:#ffffff0e;border:1px solid #ffffff14;border-radius:20px;padding:clamp(12px,3vw,16px)}.history{max-height:min(310px,36vh);margin-top:20px;overflow:auto}.history p{margin:8px 0}.muted{color:#94a3b8}.focusMode{justify-content:center;width:min(100%,1040px)}.focusMode .gameShell{grid-template-columns:1fr}.focusMode .panel{display:none}.focusMode .boardFrame{width:min(100vh - 142px,100vw - 28px,920px)}.focusMode .topBar{background:#ffffff0a}@media (max-width:980px){.gameShell{grid-template-columns:1fr;align-items:start}.panel{order:-1}}@media (max-width:560px){.page{padding:8px}.topBar{border-radius:18px;flex-direction:column;align-items:flex-start}.focusButton{width:100%}.boardFrame{border-radius:22px;width:calc(100vw - 16px);padding:7px}.board{border-width:5px;border-radius:16px}.panel{border-radius:22px;padding:14px}.notes{display:none}.history{max-height:180px}.modeToggle{grid-template-columns:1fr}.focusMode .boardFrame{width:calc(100vw - 16px)}}@media (max-width:360px){.square span{font-size:clamp(1.1rem,8.6vw,2rem)}.panel h2{font-size:1.15rem}}