:root { --bg:#fff; --fg:#111; --muted:#666; --line:#eaeaea; --accent:#111; --radius:12px; --gap:12px; }
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: "Noto Sans", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}
.topbar {
  position: sticky; top: 0; z-index: 10; background: var(--bg);
  border-bottom: 1px solid var(--line); padding: 16px clamp(12px, 3vw, 24px);
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 16px;
}
.topbar h1 { font-size: clamp(18px, 2.4vw, 28px); margin: 0; font-weight: 800; letter-spacing: -0.02em; }
.controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.versus { display: inline-flex; gap: 10px; align-items: center; font-weight: 700; }
select, button {
  border: 1px solid var(--line); background: #fafafa; color: var(--fg);
  padding: 8px 12px; border-radius: 8px; font-weight: 600; cursor: pointer;
}
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.stats { color: var(--muted); font-weight: 600; }

main { max-width: 1100px; margin: 24px auto; padding: 0 clamp(12px, 3vw, 24px); }

.grid {
  display: grid; gap: var(--gap);
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
}
.card {
  position: relative; aspect-ratio: 3/4; border-radius: var(--radius);
  transform-style: preserve-3d; transition: transform 250ms ease, box-shadow 200ms ease;
  box-shadow: 0 1px 0 rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.04); background: #f4f4f4;
  outline: none; border: 1px solid var(--line);
}
.card:focus-visible { box-shadow: 0 0 0 3px #000; }
.card.flipped { transform: rotateY(180deg); }
.face, .back {
  position: absolute; inset: 0; backface-visibility: hidden; border-radius: inherit; overflow: hidden;
  display: grid; place-items: center;
}
.face {
  transform: rotateY(180deg); background: #000;
}
.face img { width: 100%; height: 100%; object-fit: cover; }
.face .label {
  position: absolute; left: 8px; right: 8px; bottom: 8px;
  background: rgba(0,0,0,0.55); color: #fff; font-weight: 700; padding: 6px 8px; border-radius: 6px;
  font-size: 12px; text-shadow: 0 1px 2px rgba(0,0,0,0.6);
}
.back {
  background: #fff; display: grid; place-items: center;
}
.back .ball {
  width: 52%; aspect-ratio: 1; border: 2px solid #111; border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, #111 0 4px, transparent 5px),
    radial-gradient(circle at 70% 30%, #111 0 4px, transparent 5px),
    radial-gradient(circle at 50% 70%, #111 0 4px, transparent 5px);
}
.card.matched { outline: none; box-shadow: none; }
.card.matched.owner1 { outline: 3px solid #d00; box-shadow: 0 0 0 2px rgba(208,0,0,0.2) inset; }
.card.matched.owner2 { outline: 3px solid #06c; box-shadow: 0 0 0 2px rgba(0,102,204,0.2) inset; }
.card.disabled { pointer-events: none; opacity: 0.6; }

.end-panel { position: fixed; inset: 0; background: rgba(0,0,0,0.5); display: grid; place-items: center; }
.end-panel:not([hidden]) .end-card { animation: pop 280ms cubic-bezier(.2,.7,.2,1); }
@keyframes pop { from { transform: translateY(6px) scale(.97); opacity: 0; } to { transform: none; opacity: 1; } }
.end-card { background: #fff; color: #111; padding: 20px; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.2); text-align: center; min-width: 280px; }
.end-panel[hidden] { display: none; }

.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  background: #111; color: #fff; padding: 10px 14px; border-radius: 999px; font-weight: 700;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2); transition: opacity 200ms ease, transform 200ms ease;
}
.toast[hidden] { opacity: 0; transform: translateX(-50%) translateY(8px); pointer-events: none; }

.footer {
  max-width: 1100px; margin: 24px auto; padding: 0 clamp(12px, 3vw, 24px);
  color: var(--muted); font-size: 12px; text-align: center;
}

@media (min-width: 1200px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}

.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 100; }