:root{color-scheme:dark;--ink:#f5f2e9;--muted:#a8a9b2;--panel:#191c25;--panel2:#222633;--light:#d8c9a6;--dark:#735945;--accent:#ffcb5b;--green:#6fe0ad;--red:#ff7d75}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;background:radial-gradient(circle at 15% 0,#2b2540 0,transparent 38rem),linear-gradient(145deg,#0c0e13,#151823 65%,#10131b);color:var(--ink);font-family:ui-rounded,"SF Pro Rounded","Avenir Next",system-ui,sans-serif}
button,a{font:inherit}button{color:inherit}.shell{width:min(1120px,calc(100% - 32px));margin:auto;padding:34px 0 24px}
.hero{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:24px}.eyebrow{margin:0 0 7px;color:var(--accent);font-size:.73rem;font-weight:850;letter-spacing:.16em}.hero h1{font-size:clamp(2.2rem,6vw,4.7rem);line-height:.92;letter-spacing:-.055em;margin:0}.lede{color:var(--muted);margin:12px 0 0;font-size:1.05rem}
.icon-button,.actions button{border:1px solid #424757;background:#222632;border-radius:999px;padding:10px 15px;cursor:pointer}.game-card{background:rgba(25,28,37,.94);border:1px solid #313645;border-radius:24px;box-shadow:0 28px 80px #0008;overflow:hidden}
.status-row{display:grid;grid-template-columns:repeat(4,1fr);background:#12151d;border-bottom:1px solid #303543}.status-row div{padding:15px 20px;border-right:1px solid #303543}.status-row div:last-child{border:0}.status-row span{display:block;color:var(--muted);font-size:.67rem;font-weight:800;letter-spacing:.13em}.status-row strong{display:block;margin-top:2px;font-size:1.28rem}.play-grid{display:grid;grid-template-columns:minmax(330px,720px) 1fr}
.board-wrap{position:relative;padding:22px;background:linear-gradient(145deg,#232837,#181b24)}.board{display:grid;grid-template-columns:repeat(8,1fr);width:100%;aspect-ratio:1;border:7px solid #0d0f15;border-radius:12px;overflow:hidden;box-shadow:0 16px 36px #0008}.square{display:grid;place-items:center;position:relative;border:0;border-radius:0;padding:0;cursor:pointer;font-family:"Arial Unicode MS","Apple Symbols",serif;font-size:clamp(1.75rem,6vw,4.35rem);line-height:1}.square.white-piece{color:#fffdf5;text-shadow:0 2px 2px #19130acc,0 0 1px #000}.square.black-piece{color:#171922;text-shadow:0 1px 1px #ffffffaa}.square.light{background:var(--light)}.square.dark{background:var(--dark)}.square.selected{box-shadow:inset 0 0 0 5px var(--accent);z-index:2}.square.hint{animation:hint 1s infinite;box-shadow:inset 0 0 0 5px var(--green);z-index:1}.square.last{box-shadow:inset 0 0 0 4px #6fe0ad99}.square:focus-visible{outline:5px solid white;outline-offset:-5px;z-index:3}@keyframes hint{50%{box-shadow:inset 0 0 0 9px var(--green)}}
.veil{position:absolute;inset:22px;display:grid;place-items:center;background:#0b0d12d9;backdrop-filter:blur(8px);border-radius:12px}.veil.hidden{display:none}.veil-card{text-align:center;max-width:470px;padding:24px}.veil h2{font-size:clamp(1.7rem,4vw,3rem);line-height:1.03;margin:5px 0 12px}.veil p:not(.eyebrow){color:#c8c9ce;line-height:1.55}.primary{border:0;border-radius:12px;background:var(--accent);color:#19130a;font-weight:900;padding:13px 24px;cursor:pointer;box-shadow:0 8px 22px #0007}.side-panel{padding:28px;display:flex;flex-direction:column;min-width:0}.side-panel h2{font-size:1.65rem;margin:0}.message{min-height:54px;color:#c8c9d3;line-height:1.45}.message.good{color:var(--green);font-weight:800}.message.bad{color:var(--red);font-weight:800}.mini-stats{border-top:1px solid #373c49;border-bottom:1px solid #373c49;margin-top:auto}.mini-stats p{display:flex;justify-content:space-between;color:var(--muted)}.mini-stats strong{color:var(--ink)}.actions{display:flex;gap:8px;margin:18px 0 0}.actions button{flex:1}.tip{color:var(--muted);font-size:.82rem;line-height:1.45;margin:14px 0 0}footer{display:flex;justify-content:space-between;gap:16px;color:#777c8a;font-size:.76rem;padding:16px 4px}footer a{color:#b4b8c4}
@media(max-width:780px){.shell{width:min(100% - 18px,620px);padding-top:18px}.hero{align-items:center}.hero h1{font-size:2.65rem}.lede{font-size:.9rem}.play-grid{grid-template-columns:1fr}.board-wrap{padding:10px}.veil{inset:10px}.side-panel{padding:20px}.status-row div{padding:11px 9px}.status-row strong{font-size:1rem}.square{font-size:clamp(1.7rem,10vw,4rem)}footer{flex-direction:column}.tip{display:none}}
@media(prefers-reduced-motion:reduce){.square.hint{animation:none}}