/* Royal Edition — wood + gold look */
:root{
  --gold1:#ffe59a; --gold2:#c89b3c; --gold3:#7a5a14;
  --bg1:#190f08; --bg2:#2b1a0c;
  --wood1:#b17d4a; --wood2:#7c4f2b; --wood3:#532f17;
  --square-light:#f0d7b0; --square-dark:#b07a50;
  --shadow: 0 10px 40px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
body{margin:0;background:radial-gradient(1200px 600px at 50% -10%, #3a2411, #1a0f08 60%);font:600 16px/1.4 ui-sans-serif,system-ui,Segoe UI,Roboto;color:#eee;letter-spacing:.2px}
.screen{display:none;min-height:100vh;padding:14px}
.screen.show{display:block}
.bar{display:flex;align-items:center;gap:10px;background:linear-gradient(180deg,#3a2512,#2b1a0c);border:1px solid #714a21;border-radius:18px;padding:10px 14px;box-shadow:var(--shadow)}
.bar h1{margin:0;font-weight:900;letter-spacing:.6px;background:linear-gradient(180deg,var(--gold1),var(--gold2));-webkit-background-clip:text;color:transparent;text-shadow:0 2px 0 #0007}

.btn{background:linear-gradient(180deg,#3d2714,#2b1a0c);border:1px solid #6f4820;color:#f5dca3;border-radius:12px;padding:10px 14px;cursor:pointer;box-shadow:0 4px 10px #0007}
.btn:hover{filter:brightness(1.05)}
.btn.gold{background:linear-gradient(180deg,var(--gold1),var(--gold2));color:#2b1a0c;border:1px solid var(--gold3)}
.btn.big{font-size:22px;border-radius:16px;padding:14px 28px}
.btn.ghost{background:transparent;border-color:#6f4820;color:#f5dca3}

.splash{display:grid;place-items:center;gap:16px;text-align:center}
.em-logo{font-size:48px;font-weight:900;line-height:.9;letter-spacing:1px;background:linear-gradient(180deg,var(--gold1),var(--gold2));-webkit-background-clip:text;color:transparent;text-shadow:0 2px 0 #0008}
.em-logo span{display:block;font-size:58px}
.board-hero{width:min(88vw,520px);aspect-ratio:1;border-radius:24px;box-shadow:var(--shadow);background:
  linear-gradient(145deg,#0005,#0000 40%),
  repeating-linear-gradient(35deg,#7c4f2b 0 8px,#532f17 8px 16px),
  linear-gradient(180deg,#3a2512,#2b1a0c);
  position:relative}
.board-hero::after{content:"";position:absolute;inset:18px;border-radius:14px;background:
  conic-gradient(#b07a50 0 45deg,#f0d7b0 0 90deg) 0 0/25% 25%,
  conic-gradient(#b07a50 0 45deg,#f0d7b0 0 90deg) 12.5% 12.5% /25% 25%;
  mix-blend-mode:screen;opacity:.15}

.mode-grid{display:grid;gap:14px;margin-top:14px}
.card{display:grid;place-items:center;padding:20px;background:linear-gradient(180deg,#3a2512,#2b1a0c);border:1px solid #714a21;border-radius:16px;color:#f5dca3;box-shadow:var(--shadow)}
.card .icon{font-size:42px}
.card .stars{display:flex;gap:6px;margin-top:8px}
.star{font-size:22px;background:transparent;border:1px solid #6f4820;color:#f5dca3;border-radius:8px;padding:4px 10px}
.star.on{background:linear-gradient(180deg,var(--gold1),var(--gold2));color:#2b1a0c;border-color:var(--gold3)}

.hud{display:flex;gap:12px;margin:12px 0}
.clock{flex:1;background:linear-gradient(180deg,#3a2512,#2b1a0c);border:1px solid #714a21;border-radius:14px;padding:8px 12px;display:flex;justify-content:space-between;align-items:center}
.clock .dot{width:10px;height:10px;border-radius:50%;background:#6b4a2a}
.clock .dot.active{background:#3ee07a;box-shadow:0 0 0 6px rgba(62,224,122,.15)}

.board-wrap{display:grid;place-items:center}
.board{width:min(92vw,640px);aspect-ratio:1;border-radius:22px;overflow:hidden;box-shadow:var(--shadow);position:relative;background:linear-gradient(180deg,#6e4526,#4a2b15)}
.square{position:absolute;width:12.5%;height:12.5%}
.square.light{background:var(--square-light)}
.square.dark{background:var(--square-dark)}
.piece{width:86%;height:86%}
.piece svg{width:100%;height:100%}
.piece.white{filter:drop-shadow(0 6px 10px rgba(255,255,255,.25))}
.piece.black{filter:drop-shadow(0 6px 10px rgba(0,0,0,.45))}
.square.selected{outline:3px solid rgba(255,215,64,.5);outline-offset:-3px}
.square.legal::after{content:"";width:34%;height:34%;border-radius:50%;background:rgba(62,224,122,.28);display:block;margin:auto}
.square.capture::after{content:"";width:70%;height:70%;border-radius:50%;border:6px solid rgba(62,224,122,.32);margin:auto}

.coords{position:absolute;pointer-events:none;font-weight:800;color:#0006;text-shadow:0 1px 0 #fff8}
.files{inset:auto 0 -22px 0;display:flex;justify-content:space-between;width:calc(min(92vw,640px) - 10px);padding:0 16px}
.ranks{inset:0 auto 0 -22px;display:flex;flex-direction:column;justify-content:space-between;height:calc(min(92vw,640px) - 10px);padding:16px 0}

.gamebar{margin-top:10px;display:flex;gap:10px;align-items:center;justify-content:space-between;background:linear-gradient(180deg,#3a2512,#2b1a0c);border:1px solid #714a21;border-radius:16px;padding:10px 12px;box-shadow:var(--shadow)}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.chk{display:flex;gap:6px;align-items:center}