:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#080c16;--card:#0f172ac7;--card-strong:#0f172af5;--line:#94a3b838;--text:#f8fafc;--muted:#a8b3c7;--accent:#38bdf8;--gold:#f7c948;--green:#34d399;--danger:#fb7185;--light-square:#e6d7b9;--dark-square:#7f5b3f}*{box-sizing:border-box}body{min-height:100vh;color:var(--text);background:radial-gradient(circle at 20% 10%,#38bdf842,#0000 32rem),radial-gradient(circle at 80% 20%,#f7c94829,#0000 28rem),linear-gradient(135deg,#020617 0%,#111827 48%,#0f172a 100%);margin:0;font-family:Arial,Helvetica,sans-serif}button{font:inherit}.page-shell{width:min(1180px,100vw - 32px);margin:0 auto;padding:36px 0}.hero-card,.game-layout,.panel,.moves-card,.status-card{border:1px solid var(--line);background:var(--card);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:0 24px 90px #00000059}.hero-card{border-radius:28px;grid-template-columns:1fr minmax(260px,420px);align-items:stretch;gap:24px;margin-bottom:24px;padding:28px;display:grid}.eyebrow{color:var(--accent);letter-spacing:.18em;text-transform:uppercase;margin:0 0 10px;font-size:.78rem;font-weight:800}h1{letter-spacing:-.07em;max-width:820px;margin:0;font-size:clamp(2.1rem,6vw,4.4rem);line-height:.95}.hero-copy p:last-child{color:var(--muted);max-width:680px;font-size:1.05rem;line-height:1.6}.status-card{border-radius:22px;align-content:center;gap:12px;padding:22px;display:grid}.status-label{color:var(--muted);text-transform:uppercase;letter-spacing:.14em;font-size:.8rem}.status-card strong{color:var(--green);font-size:1.55rem}.fen{color:var(--muted);overflow-wrap:anywhere;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:.75rem}.game-layout{border-radius:28px;grid-template-columns:minmax(300px,720px) minmax(260px,1fr);gap:24px;padding:24px;display:grid}.board-wrap{background:linear-gradient(135deg,#ffffff3d,#ffffff0f);border-radius:22px;align-self:start;padding:10px;overflow:hidden}.board{aspect-ratio:1;border-radius:16px;grid-template-columns:repeat(8,1fr);width:100%;display:grid;overflow:hidden}.square{cursor:pointer;border:0;justify-content:center;align-items:center;min-width:0;padding:0;transition:filter .14s,transform .14s,box-shadow .14s;display:flex;position:relative}.square:hover,.square:focus-visible{filter:brightness(1.12);outline-offset:-3px;z-index:2;outline:3px solid #38bdf8b3}.square.light{background:var(--light-square)}.square.dark{background:var(--dark-square)}.square.selected{box-shadow:inset 0 0 0 5px var(--accent)}.square.last{box-shadow:inset 0 0 0 5px #f7c948c2}.square.selected.last{box-shadow:inset 0 0 0 5px var(--accent), inset 0 0 0 9px #f7c948c2}.square.target:after{content:"";background:#080d1a52;border:3px solid #ffffff59;border-radius:999px;width:28%;height:28%;position:absolute}.piece{filter:drop-shadow(0 6px 6px #0006);pointer-events:none;-webkit-user-select:none;user-select:none;z-index:1;font-size:clamp(2rem,7.5vw,4.7rem);line-height:1}.piece.white{color:#fff8e7}.piece.black{color:#171717}.coord{color:#0f172aa3;text-transform:uppercase;font-size:clamp(.52rem,1.8vw,.72rem);font-weight:800;position:absolute;bottom:5px;left:6px}.dark .coord{color:#ffffff9e}.panel{border-radius:22px;flex-direction:column;align-self:stretch;gap:18px;padding:18px;display:flex}.controls{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.controls button{border:1px solid var(--line);color:var(--text);cursor:pointer;background:#ffffff17;border-radius:14px;padding:13px 12px;font-weight:800}.controls button:hover:not(:disabled){background:#ffffff29}.controls button:disabled{cursor:not-allowed;opacity:.45}.controls .danger{color:var(--danger)}.moves-card{background:var(--card-strong);border-radius:18px;flex:1;min-height:260px;padding:18px;overflow:hidden}.moves-card h2{letter-spacing:.12em;text-transform:uppercase;margin:0 0 12px;font-size:1rem}.empty{color:var(--muted)}.move-list{gap:8px;max-height:560px;margin:0;padding:0;list-style:none;display:grid;overflow:auto}.move-list li{background:#ffffff0f;border-radius:12px;grid-template-columns:48px 1fr 1fr;align-items:center;gap:10px;padding:10px 12px;display:grid}.move-number{color:var(--muted)}@media (max-width:920px){.hero-card,.game-layout,.controls{grid-template-columns:1fr}}@media (max-width:520px){.page-shell{width:min(100vw - 16px,1180px);padding:8px 0}.hero-card,.game-layout{border-radius:20px;padding:12px}.status-card,.panel{border-radius:16px}.board-wrap{padding:5px}.coord{display:none}}