html, body{
  height:100%;
}

body{
  margin:0;

  /* неоновый фон страницы */
  background:
    radial-gradient(900px 600px at 15% 20%, rgba(0,255,255,.18), transparent 60%),
    radial-gradient(800px 520px at 85% 30%, rgba(255,0,200,.16), transparent 55%),
    radial-gradient(900px 700px at 50% 85%, rgba(120,255,0,.10), transparent 60%),
    linear-gradient(135deg, #070a1a, #0a0614);

  color:#e8eef7;
}
:root{--puzzle-url:url('../assets/img/puzzles/puzzle0.jpg');}
.app{min-height:100vh;display:flex;flex-direction:column;gap:14px;padding:14px;max-width:980px;margin:0 auto}
.top{display:flex;justify-content:space-between;gap:12px;flex-wrap:nowrap;align-items:flex-start}
.brand{min-width:0}
.stats{margin-left:auto;display:flex;gap:10px;flex-wrap:nowrap;flex-shrink:0;align-items:flex-start}
.brand__title{font-weight:950;font-size:22px;letter-spacing:.2px}
.brand__sub{opacity:.85;font-weight:800;margin-top:2px}
.stats{display:flex;gap:10px;flex-wrap:wrap}
.chip{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);border-radius:999px;padding:8px 12px;font-weight:900;backdrop-filter:blur(8px)}
.boardWrap{flex:1;display:flex;align-items:center;justify-content:center}
.board{
  width:min(92vmin,560px);
  aspect-ratio:1/1;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.04);
  position:relative;
  overflow:hidden;
  box-shadow:0 18px 60px rgba(0,0,0,.45);
  touch-action:manipulation;
}
.tile{
  position:absolute;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 10px 24px rgba(0,0,0,.35);
  background-image:var(--puzzle-url);
  background-repeat:no-repeat;
  cursor:pointer;
  transition:transform .12s ease;
  will-change:transform;
}
.tile:active{transform:scale(0.985)}
.tile--glow{box-shadow:0 0 0 2px rgba(80,180,255,.35), 0 10px 24px rgba(0,0,0,.35)}
.bottom{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.btn{border-radius:16px;padding:12px 14px;font-weight:950;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);color:#e8eef7;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.btn--primary{background:rgba(232,238,247,.92);color:#0b0f14;border:0}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.68);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:18px;z-index:50}
.hidden{display:none}
.cardModal{max-width:860px;width:100%;border-radius:18px;border:1px solid rgba(255,255,255,.14);background:rgba(10,14,20,.88);box-shadow:0 18px 60px rgba(0,0,0,.45);padding:16px}
.cardModal h1{margin:0 0 10px;font-size:26px}
.cardModal p{margin:0 0 12px;opacity:.92;line-height:1.55}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:20px;font-weight:950;letter-spacing:1px;padding:10px 12px;border-radius:14px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);display:inline-block}
.small{font-size:13px;opacity:.85}

@media (max-width: 520px){
  .app{padding:12px}
  .brand__title{font-size:20px}
  .brand__sub{font-size:13px}
  .chip{padding:7px 10px;font-size:13px}
  .stats{gap:8px}
}
.mailLink,
.mailLink:visited{
  color: inherit;
  text-decoration: underline;
}