:root {
  --ink: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --ok: #86efac;
  --bad: #fda4af;
  --font: "Nunito", "Noto Sans Myanmar", "Padauk", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background: #0f172a;
}
.bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(circle at 80% 8%, rgba(56,189,248,0.28), transparent 40%),
    radial-gradient(circle at 10% 70%, rgba(167,139,250,0.18), transparent 42%),
    linear-gradient(165deg, #0b1220, #1e293b 55%, #334155);
}
.shell {
  position: relative; z-index: 1;
  max-width: 440px;
  margin: 0 auto;
  padding: max(20px, env(safe-area-inset-top)) 16px 36px;
  animation: rise 0.5s ease both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
.hero { text-align: center; margin-bottom: 16px; }
.badge {
  display: inline-block;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.45rem;
}
h1 {
  margin: 0;
  font-size: clamp(1.7rem, 6vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.sub {
  margin: 0.45rem auto 0.9rem;
  max-width: 28em;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.4;
  font-weight: 600;
}
.meta { display: flex; justify-content: center; }
.chip {
  display: inline-flex; gap: 0.35rem; align-items: center;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  font-size: 0.86rem;
  font-weight: 700;
}
.chip b { color: var(--accent); font-variant-numeric: tabular-nums; }
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.card {
  aspect-ratio: 3/4;
  border: 0;
  border-radius: 18px;
  cursor: pointer;
  perspective: 900px;
  background: transparent;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
.card .inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
  border-radius: 18px;
}
.card.flipped .inner { transform: rotateY(180deg); }
.face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  display: grid;
  place-items: center;
  border-radius: 18px;
  font-size: 1.9rem;
  font-weight: 800;
}
.back {
  background:
    radial-gradient(circle at 30% 25%, rgba(255,255,255,0.35), transparent 40%),
    linear-gradient(145deg, #38bdf8, #0284c7 55%, #0369a1);
  box-shadow:
    inset 0 0 0 2px rgba(255,255,255,0.28),
    0 12px 24px rgba(0,0,0,0.28);
  color: rgba(255,255,255,0.9);
}
.front {
  transform: rotateY(180deg);
  background: #f8fafc;
  color: #0f172a;
  box-shadow: 0 12px 24px rgba(0,0,0,0.28);
}
.front.win {
  background: linear-gradient(160deg, #bbf7d0, #86efac);
  color: #14532d;
}
.front.lose {
  background: linear-gradient(160deg, #fecdd3, #fda4af);
  color: #7f1d1d;
}
.msg {
  min-height: 1.4em;
  text-align: center;
  font-weight: 800;
  margin-top: 14px;
}
.msg.ok { color: var(--ok); }
.msg.bad { color: var(--bad); }
.btn {
  display: block; width: 100%;
  border: 0; border-radius: 999px;
  padding: 13px 18px;
  margin-top: 10px;
  background: rgba(255,255,255,0.12);
  color: #fff;
  font: inherit; font-weight: 800;
  cursor: pointer;
  box-shadow: 0 4px 0 rgba(0,0,0,0.25);
}
.btn:active { transform: translateY(2px); }
body.lang-my { --font: "Noto Sans Myanmar", "Padauk", "Nunito", system-ui, sans-serif; }