:root {
  --bg0:#0b1220; --bg1:#111827; --panel:rgba(15,23,42,.84); --line:rgba(148,163,184,.18);
  --text:#f8fafc; --muted:#94a3b8; --accent:#38bdf8; --good:#34d399; --bad:#fb7185; --warn:#fbbf24;
  --cell-closed:#1e293b; --cell-open:#e2e8f0; --cell-hover:#334155; --mine:#0f172a; --flag:#f43f5e;
  --radius:16px; --shadow:0 18px 50px rgba(0,0,0,.35);
  --n1:#2563eb; --n2:#16a34a; --n3:#dc2626; --n4:#7c3aed; --n5:#b45309; --n6:#0f766e; --n7:#111827; --n8:#64748b;
  --cell: 34px;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;color:var(--text);font-family:Inter,system-ui,sans-serif;
background:radial-gradient(circle at 12% 12%,rgba(56,189,248,.12),transparent 28%),radial-gradient(circle at 88% 8%,rgba(251,113,133,.1),transparent 24%),linear-gradient(165deg,#0b1220,#111827 52%,#0f172a)}
body.ms-remake{overflow-x:hidden}
.app{min-height:100vh;display:flex;flex-direction:column}
.top{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:12px 16px;border-bottom:1px solid var(--line);background:rgba(15,23,42,.78);backdrop-filter:blur(12px);position:sticky;top:0;z-index:20}
.brand{display:flex;gap:10px;align-items:center;font-weight:800}
.badge{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#38bdf8,#f43f5e);color:#fff;font-size:16px}
.brand small{display:block;color:var(--muted);font-size:12px;font-weight:600}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.btn,.select{appearance:none;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);border-radius:12px;min-height:40px;padding:8px 12px;font-weight:700;cursor:pointer}
.btn.primary{background:linear-gradient(135deg,#38bdf8,#0ea5e9);color:#082f49;border:none}
.btn.active{border-color:rgba(56,189,248,.55);background:rgba(56,189,248,.14)}
.btn.danger{border-color:rgba(251,113,133,.4);color:#fecdd3}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn:focus-visible,.select:focus-visible,.cell:focus-visible{outline:2px solid #38bdf8;outline-offset:2px}
.main{width:min(1180px,100%);margin:0 auto;padding:16px;display:grid;gap:14px}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px}
.card span{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}
.card strong{font-size:20px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:14px;align-items:start}
.board-shell{display:flex;flex-direction:column;align-items:center;gap:12px}
.hud{width:min(100%, calc(var(--cell) * var(--cols, 9) + 24px));display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center}
.hud .meter{background:rgba(2,6,23,.55);border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-variant-numeric:tabular-nums;font-weight:800}
.hud .meter.left{justify-self:start}
.hud .meter.right{justify-self:end;text-align:right}
.face{width:52px;height:52px;border-radius:16px;border:1px solid var(--line);background:linear-gradient(180deg,#1f2937,#0f172a);font-size:26px;cursor:pointer;box-shadow:var(--shadow)}
.board-frame{width:min(100%, calc(var(--cell) * var(--cols, 9) + 24px));background:rgba(15,23,42,.72);border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow);overflow:auto;max-width:100%;touch-action:pan-x pan-y}
.board-frame.zoomable{cursor:grab}
.board{
  display:grid;
  grid-template-columns:repeat(var(--cols,9), var(--cell));
  grid-template-rows:repeat(var(--rows,9), var(--cell));
  gap:2px; width:max-content; margin:0 auto; user-select:none;
  transform-origin: top left;
}
.cell{
  width:var(--cell); height:var(--cell); display:grid; place-items:center;
  background:linear-gradient(180deg,#334155,#1e293b); border:1px solid #0f172a;
  border-radius:6px; color:var(--text); font-weight:900; font-size:calc(var(--cell)*.42);
  cursor:pointer; position:relative; box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  transition: transform .08s ease, background .12s ease, box-shadow .12s ease;
}
.cell:hover:not(.open):not(.exploded){background:linear-gradient(180deg,#475569,#243244)}
.cell:active:not(.open){transform:scale(.96)}
.cell.open{background:var(--cell-open); color:#0f172a; box-shadow:inset 0 0 0 1px rgba(15,23,42,.08); cursor:default}
.cell.flag{color:var(--flag)}
.cell.question{color:var(--warn)}
.cell.mine{background:#fecdd3; color:#881337}
.cell.exploded{background:#fb7185; color:#450a0a; box-shadow:0 0 0 2px rgba(251,113,133,.5)}
.cell.wrong-flag{background:#fee2e2; color:#991b1b}
.cell.cascade{animation:pop .18s ease}
.cell.n1{color:var(--n1)} .cell.n2{color:var(--n2)} .cell.n3{color:var(--n3)} .cell.n4{color:var(--n4)}
.cell.n5{color:var(--n5)} .cell.n6{color:var(--n6)} .cell.n7{color:var(--n7)} .cell.n8{color:var(--n8)}
@keyframes pop{from{transform:scale(.86);opacity:.55} to{transform:scale(1);opacity:1}}
.tools{width:min(100%, calc(var(--cell) * var(--cols, 9) + 24px));display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.status{width:min(100%, calc(var(--cell) * var(--cols, 9) + 24px));color:var(--muted);min-height:20px;font-size:14px}
.side{display:grid;gap:12px}
.side h3{margin:0 0 8px;font-size:15px}
.side p,.side li{color:var(--muted);font-size:13px;line-height:1.5}
.side ul{margin:0;padding-left:18px}
.ach{display:grid;gap:8px}
.ach-item{display:flex;gap:8px;padding:8px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--muted);font-size:12px}
.ach-item.on{color:var(--text);border-color:rgba(251,191,36,.35);background:rgba(251,191,36,.08)}
.custom-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.custom-grid label{display:grid;gap:4px;color:var(--muted);font-size:12px}
.custom-grid input{min-height:38px;border-radius:10px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);padding:8px;font-weight:700}
.overlay{position:fixed;inset:0;background:rgba(2,6,23,.62);display:none;place-items:center;z-index:40;padding:16px}
.overlay.show{display:grid}
.modal{width:min(440px,100%);background:rgba(15,23,42,.96);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px}
.modal h2{margin:0 0 8px}.modal p{color:var(--muted)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0}
.grid2 div{background:rgba(255,255,255,.04);border-radius:12px;padding:10px}
.grid2 span{display:block;color:var(--muted);font-size:12px}
.toast{position:fixed;left:50%;bottom:16px;transform:translateX(-50%) translateY(16px);background:rgba(15,23,42,.95);border:1px solid rgba(56,189,248,.35);padding:10px 14px;border-radius:999px;opacity:0;transition:.2s;z-index:50;font-weight:700}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
@media(max-width:980px){
  .layout{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tools{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
  .top{padding:10px}
  .brand small{display:none}
  .face{width:46px;height:46px}
  .board-frame{max-height:62vh}
}
@media (prefers-reduced-motion: reduce){
  .cell,.toast{transition:none}
  .cell.cascade{animation:none}
}