:root{
  --bg:#171512;
  --panel:#211e1a;
  --panel2:#28231e;
  --text:#f2eee7;
  --muted:#a9a197;
  --line:#3b342d;
  --accent:#c79a5b;
  --accent2:#e0bc84;
  --light:#e7d8c0;
  --dark:#8d6847;
  --danger:#b9685e;
  --shadow:0 18px 60px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,sans-serif}
button,input,select{font:inherit}
button{cursor:pointer}
body{padding:20px}
.app{max-width:1180px;margin:auto}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px}
.eyebrow{font-size:11px;letter-spacing:.2em;color:var(--accent2)}
h1,h2,h3,p{margin:0}
h1{font-size:25px;margin-top:4px}
h2{font-size:clamp(36px,6vw,72px);line-height:.96;letter-spacing:-.045em;margin:20px 0}
h3{font-size:20px}
.top-actions,.controls,.form-row{display:flex;gap:10px;flex-wrap:wrap}
.btn{border:1px solid var(--line);background:var(--panel);color:var(--text);padding:10px 14px;border-radius:10px;min-height:42px}
.btn:hover{border-color:#635548;background:var(--panel2)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#1a1510}
.btn.danger{background:transparent;border-color:#70423e;color:#e3aaa3}
.panel,.hero{border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow);border-radius:16px}
.hero{padding:clamp(24px,5vw,54px);display:grid;grid-template-columns:1.1fr .9fr;gap:35px;align-items:end}
.hero p{max-width:650px;color:var(--muted);font-size:16px;line-height:1.6}
.pill{display:inline-flex;align-items:center;padding:5px 9px;border:1px solid var(--line);border-radius:999px;color:var(--accent2);font-size:12px}
.home-grid{display:grid;gap:10px}
.mode-card{display:flex;flex-direction:column;text-align:left;gap:6px;padding:18px;border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:12px}
.mode-card:hover{border-color:var(--accent)}
.mode-card span{color:var(--muted);font-size:13px}
.party-panel{margin-top:14px;padding:20px}
.form-row{align-items:end;margin-top:14px}
label{display:grid;gap:6px;color:var(--muted);font-size:12px;min-width:180px}
input,select{height:42px;padding:0 12px;border-radius:9px;border:1px solid var(--line);background:#171512;color:var(--text);outline:none}
input:focus,select:focus{border-color:var(--accent)}
.error{color:#df9d95;margin-top:10px;min-height:18px}
.game-layout{display:grid;grid-template-columns:minmax(0,760px) 330px;gap:18px;align-items:start}
.left-panel{padding:14px}
.right-column{display:grid;gap:12px}
.player-row{display:grid;grid-template-columns:42px 1fr auto;gap:10px;align-items:center;padding:7px 4px 12px}
.player-row:last-child{padding:12px 4px 7px}
.avatar{width:36px;height:36px;border:1px solid var(--line);display:grid;place-items:center;border-radius:9px;background:var(--panel2)}
.player-row strong,.player-row span{display:block}
.player-row span{font-size:12px;color:var(--muted);margin-top:2px}
.clock{font-variant-numeric:tabular-nums;font-size:24px;font-weight:700}
.board-wrap{width:100%;aspect-ratio:1;max-width:760px;margin:auto}
.board{width:100%;height:100%;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);overflow:hidden;border-radius:8px;user-select:none;touch-action:manipulation}
.square{position:relative;display:grid;place-items:center;font-size:clamp(27px,7vw,70px);line-height:1}
.square.light{background:var(--light);color:#251e18}
.square.dark{background:var(--dark);color:#17120f}
.square.last-from::after,.square.last-to::after{content:"";position:absolute;inset:0;background:rgba(230,184,92,.26);pointer-events:none}
.square.selected{box-shadow:inset 0 0 0 4px rgba(255,239,202,.75)}
.square.legal::before{content:"";position:absolute;width:18%;height:18%;border-radius:50%;background:rgba(40,30,20,.35);z-index:1}
.square.capture::before{content:"";position:absolute;inset:8%;border:5px solid rgba(70,40,20,.42);border-radius:50%;z-index:1}
.square.trajectory{box-shadow:inset 0 0 0 3px rgba(255,245,210,.28)}
.piece{position:relative;z-index:2;font-family:"DejaVu Sans","Segoe UI Symbol",serif;text-shadow:0 1px 0 rgba(0,0,0,.15)}
.coord{position:absolute;font-size:9px;font-weight:700;opacity:.7;z-index:3;pointer-events:none}
.coord.file{right:4px;bottom:2px}
.coord.rank{left:4px;top:2px}
.panel{padding:14px}
.panel-title{display:flex;justify-content:space-between;align-items:center;gap:10px;font-weight:700}
.status{color:var(--muted);font-size:13px;line-height:1.5;margin-top:10px}
.material{display:flex;justify-content:space-between;margin-top:12px;font-size:14px;color:var(--muted);min-height:23px}
.material span{letter-spacing:2px}
.controls{display:grid;grid-template-columns:1fr 1fr}
.controls .btn{width:100%}
.moves-panel{min-height:180px}
.moves-list{display:grid;grid-template-columns:1fr 1fr;gap:2px 10px;margin-top:10px;max-height:260px;overflow:auto}
.move{display:grid;grid-template-columns:32px 1fr 1fr;padding:6px 7px;border-radius:7px;color:var(--muted);font-size:13px}
.move:nth-child(odd){background:#1a1714}
.move-number{color:#70675e}
.chat-messages{height:180px;overflow:auto;margin-top:10px;display:grid;align-content:start;gap:8px}
.chat-message{font-size:13px}
.chat-message b{color:var(--accent2)}
.chat-message span{color:var(--muted)}
.chat-form{display:flex;gap:7px;margin-top:10px}
.chat-form input{min-width:0;flex:1}
.hidden{display:none!important}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.62);display:grid;place-items:center;padding:20px;z-index:20}
.modal-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px;width:min(430px,100%)}
.promotion-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:16px}
.promotion-grid button{border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:10px;padding:12px;font-size:34px}
.promotion-grid span{display:block;font-size:11px;color:var(--muted)}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:#2a251f;border:1px solid var(--line);padding:10px 14px;border-radius:9px;transition:.2s;z-index:30}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:920px){
  body{padding:10px}
  .hero{grid-template-columns:1fr}
  .game-layout{grid-template-columns:1fr}
  .right-column{grid-template-columns:1fr 1fr}
  .moves-panel,.chat-panel{grid-column:span 2}
}
@media(max-width:560px){
  .topbar{align-items:flex-start}
  .top-actions{justify-content:flex-end}
  .top-actions .btn{padding:8px 10px}
  .game-layout{gap:10px}
  .left-panel{padding:7px}
  .right-column{grid-template-columns:1fr}
  .moves-panel,.chat-panel{grid-column:auto}
  .controls{grid-template-columns:1fr 1fr}
  .square{font-size:clamp(24px,10vw,46px)}
}