/* Reversi — scoped game UI */
.rev-shell{
  --rev-black: #0F172A;
  --rev-white: #F8FAFC;
  --rev-board: #15803D;
  --rev-valid: rgba(250,204,21,.45);
  max-width: 520px;
  margin: 0 auto 28px;
}

.rev-hud{
  display:grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap:10px;
  margin-bottom:14px;
}
.rev-stat{
  background: rgba(255,255,255,.06);
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px 14px;
  text-align:center;
}
.rev-stat .label{
  display:block;
  font-size:11px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--muted);
  font-weight:700;
  margin-bottom:4px;
}
.rev-stat .value{
  font-size:20px;
  font-weight:800;
  font-variant-numeric: tabular-nums;
}
.rev-turn-dot{
  display:inline-block;
  width:12px; height:12px;
  border-radius:50%;
  margin-right:6px;
  vertical-align:middle;
  box-shadow: 0 0 0 2px rgba(255,255,255,.2);
}
.rev-turn-dot.black{ background: var(--rev-black); }
.rev-turn-dot.white{ background: var(--rev-white); }

.rev-modes{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:14px;
}
.rev-mode-btn{
  appearance:none;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color:var(--muted);
  font-weight:800;
  font-size:13px;
  padding:9px 14px;
  border-radius:999px;
  cursor:pointer;
  transition: background .12s ease, color .12s ease, border-color .12s ease;
}
.rev-mode-btn:hover{
  color:var(--text);
  border-color: rgba(255,255,255,.24);
}
.rev-mode-btn.is-active{
  color:#081018;
  background: linear-gradient(135deg, #A78BFA, #34D399);
  border-color: transparent;
}

.rev-board-wrap{
  position:relative;
  background: linear-gradient(180deg, #166534, var(--rev-board));
  border:1px solid rgba(255,255,255,.18);
  border-radius:22px;
  padding:14px;
  box-shadow: var(--shadow);
  user-select:none;
}
.rev-board{
  display:grid;
  grid-template-columns: repeat(8, 1fr);
  gap:4px;
}
.rev-cell{
  aspect-ratio:1;
  border:0;
  border-radius:8px;
  background: rgba(7,10,18,.22);
  cursor:pointer;
  position:relative;
  padding:0;
  min-width:0;
}
.rev-cell:focus-visible{
  outline:2px solid rgba(167,139,250,.9);
  outline-offset:2px;
}
.rev-cell:hover:not(:disabled){
  background: rgba(255,255,255,.08);
}
.rev-cell.is-valid{
  box-shadow: inset 0 0 0 2px var(--rev-valid);
}
.rev-cell.is-valid::after{
  content:"";
  position:absolute;
  inset:32%;
  border-radius:50%;
  background: var(--rev-valid);
  opacity:.85;
}
.rev-cell:disabled{
  cursor:default;
}
.rev-disc{
  position:absolute;
  inset:8%;
  border-radius:50%;
  box-shadow:
    inset 0 -3px 6px rgba(0,0,0,.35),
    inset 0 2px 4px rgba(255,255,255,.25);
}
.rev-disc.black{
  background: radial-gradient(circle at 35% 30%, #334155, var(--rev-black));
}
.rev-disc.white{
  background: radial-gradient(circle at 35% 30%, #fff, #CBD5E1);
}
.rev-disc.is-new{
  animation: rev-pop .18s ease-out both;
}
.rev-disc.is-flip{
  animation: rev-flip .28s ease-in-out both;
}

@keyframes rev-pop{
  from{ transform: scale(.2); opacity:.4; }
  to{ transform: scale(1); opacity:1; }
}
@keyframes rev-flip{
  0%{ transform: scale(1); }
  50%{ transform: scale(.85) rotateY(90deg); }
  100%{ transform: scale(1) rotateY(0); }
}

.rev-overlay{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  background: rgba(7,10,18,.62);
  border-radius:22px;
  padding:20px;
  z-index:2;
}
.rev-overlay[hidden]{ display:none !important; }
.rev-overlay-card{
  width:min(100%, 320px);
  text-align:center;
  background: rgba(12,18,40,.95);
  border:1px solid rgba(255,255,255,.16);
  border-radius:18px;
  padding:22px 18px;
  box-shadow: var(--shadow);
}
.rev-overlay-card h2{
  margin:0 0 8px;
  font-size:22px;
}
.rev-overlay-card p{
  margin:0 0 16px;
  color:var(--muted);
  font-size:14px;
  line-height:1.5;
}

.rev-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:14px;
  justify-content:center;
}

.rev-shell.is-busy .rev-cell{ pointer-events:none; }

@media (max-width: 420px){
  .rev-board-wrap{ padding:10px; border-radius:18px; }
  .rev-board{ gap:3px; }
  .rev-hud{ grid-template-columns: 1fr 1fr; }
  .rev-stat:last-child{ grid-column: 1 / -1; }
}