:root{
  --cell: 10.5vmin;
  --piece: calc(var(--cell) * 0.62);
  --dark: #0f0f0f;
  --light: #eeeeee;
  --hint: rgba(76,175,80,.85);
  --select: #ff9800;
  --malina: #c2185b;
  --warn: #ff9800;
  --warn-bg: rgba(255,152,0,.12);
  --pad: 16px;
  --edge-gap: -8px; /* отрицательный — ближе к доске */
  --label-green: #2e7d32;
  --last-from: #ffc107;
  --last-to: #00c853;
  --last-path: #4caf50;
}
*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;margin:0;background:#fafafa;color:#111}
.container{max-width:980px;margin:0 auto;padding:16px}
.site-header{background:#fff;border-bottom:1px solid #eaeaea;position:sticky;top:0;z-index:10}
.header-inner{max-width:980px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:12px}
.logo{height:56px;width:auto;display:block}
.site-title{margin:0;font-size:28px;line-height:1.1;font-weight:800}
.visually-hidden{position:absolute!important;clip:rect(1px,1px,1px,1px);padding:0;border:0;height:1px;width:1px;overflow:hidden}
.controls{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0;align-items:center}
.controls .auth{display:inline-flex;gap:8px;flex-wrap:wrap}
.controls .hidden{display:none!important}
.controls input[type=text]{padding:8px 10px}
.controls button,.controls label{padding:8px 12px;cursor:pointer}
.controls .toggle{display:inline-flex;align-items:center;gap:6px}
.controls .accent{background:#111;color:#fff;border:1px solid #111;border-radius:10px}
.controls .outline{background:transparent;border:1px solid #111;border-radius:10px}
.status{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.timers{display:flex;gap:12px;flex-wrap:wrap}
.timers span{font-family:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}
.board-wrap{width:100%;display:grid;place-items:center}
.board-area{position:relative;padding:var(--pad)}
#board{display:grid;grid-template-columns:repeat(8,var(--cell));gap:0;touch-action:manipulation;border:2px solid #111;position:relative;background:#111}
.cell{position:relative;width:var(--cell);height:var(--cell);display:grid;place-items:center}
.cell.light{background:var(--light)}
.cell.dark{background:var(--dark)}
.cell.selected{outline:3px solid var(--select);outline-offset:-3px}
.cell.last-from{box-shadow:inset 0 0 0 4px var(--last-from)}
.cell.last-to{box-shadow:inset 0 0 0 4px var(--last-to)}
.cell.last-path{animation:pathPulse 1.1s ease-out forwards;animation-delay:calc(var(--step) * 120ms)}
@keyframes pathPulse{0%{box-shadow:inset 0 0 0 0 rgba(76,175,80,0)}40%{box-shadow:inset 0 0 0 4px var(--last-path)}100%{box-shadow:inset 0 0 0 0 rgba(76,175,80,0)}}
.piece{width:var(--piece);height:var(--piece);border-radius:50%;box-shadow:0 2px 4px rgba(0,0,0,.35);border:2px solid #000;transform:translateZ(0)}
.piece.white{background:#fff;border-color:#000}
.piece.malina{background:#c2185b;border-color:#880e4f}
.piece.pop-in{animation:pop 200ms ease-out}
@keyframes pop{0%{transform:scale(.6)}100%{transform:scale(1)}}
.cell.hint::after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 4px var(--hint)}
.label{position:absolute;font-size:calc(var(--cell)*0.18);opacity:.95;color:var(--label-green);user-select:none;pointer-events:none;text-shadow:0 0 2px rgba(0,0,0,.4)}
.label.tl{top:3px;left:5px}
.label.br{bottom:3px;right:5px}
.edge{position:absolute;pointer-events:none;color:var(--label-green);font-weight:700;font-family:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;text-shadow:0 0 2px rgba(0,0,0,.35)}
.edge.files{display:flex;justify-content:space-between;left:var(--pad);right:var(--pad)}
.edge.files.top{top:calc(var(--edge-gap))}
.edge.files.bottom{bottom:calc(var(--edge-gap))}
.edge.ranks{display:flex;flex-direction:column;justify-content:space-between;top:var(--pad);bottom:var(--pad)}
.edge.ranks.left{left:calc(var(--edge-gap))}
.edge.ranks.right{right:calc(var(--edge-gap))}
.edge span{font-size:calc(var(--cell)*0.22);opacity:.95}
.history{margin-top:12px;max-height:220px;overflow:auto;border:1px solid #333;padding:8px;border-radius:8px;background:#111;color:#eee}
.history h4{margin:0 0 8px 0}
.history ul{list-style:none;padding:0;margin:0;display:grid;gap:4px}
.history li{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px}
.notices{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.note{padding:6px 10px;border-radius:8px;font-weight:600}
.note.warning{background:var(--warn-bg);border:1px solid var(--warn);color:#ff9800}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:grid;place-items:center;z-index:30}
.modal.hidden{display:none}
.modal__dialog{width:min(480px,92vw);background:#fff;border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.35);overflow:hidden}
.modal__header,.modal__footer{padding:12px 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #eee}
.modal__footer{border-top:1px solid #eee;border-bottom:none}
.modal__body{padding:14px;display:grid;gap:12px}
.iconbtn{background:transparent;border:none;font-size:18px;cursor:pointer}
.muted{opacity:.75}
.share{display:flex;gap:8px}
.share input{flex:1;padding:10px;border:1px solid #ccc;border-radius:10px}
.share .accent{padding:10px 12px;border-radius:10px;background:#111;color:#fff;border:1px solid #111}
.share .outline{padding:10px 12px;border-radius:10px;background:transparent;border:1px solid #111}
.qrcode{display:grid;place-items:center;padding:8px;border:1px dashed #ddd;border-radius:12px}
.toast{position:fixed;bottom:14px;left:50%;transform:translateX(-50%) translateY(20px);background:#111;color:#fff;padding:10px 14px;border-radius:10px;opacity:0;transition:.25s;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.site-footer{margin-top:24px;padding:16px 0;border-top:1px solid #eaeaea;background:#fff;text-align:center}
@media (max-width:520px){
  :root{--cell:12.5vmin;--pad:12px;--edge-gap:-6px}
  .header-inner{gap:10px}
  .logo{height:48px}
  .site-title{font-size:22px}
  .container{padding:12px}
  .controls{gap:6px}
  .controls input,.controls button{flex:1 1 auto;min-width:44px}
}