:root {
  --bg: #07111f;
  --bg2: #111c33;
  --panel: rgba(15, 23, 42, 0.82);
  --line: rgba(255, 255, 255, 0.12);
  --text: #eef4ff;
  --muted: #aab8d9;
  --accent: #60a5fa;
  --accent2: #c084fc;
  --success: #34d399;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --radius: 24px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(96, 165, 250, 0.16), transparent 25%),
    radial-gradient(circle at top right, rgba(192, 132, 252, 0.14), transparent 25%),
    linear-gradient(180deg, var(--bg2), var(--bg));
}

.bg-glow {
  position: fixed;
  width: 28rem;
  height: 28rem;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
  pointer-events: none;
}
.glow-1 { top: -6rem; left: -5rem; background: var(--accent); }
.glow-2 { right: -6rem; bottom: -6rem; background: var(--accent2); }

.app {
  width: min(1200px, 94vw);
  margin: 0 auto;
  padding: 24px 0 40px;
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 8px;
  color: #cde1ff;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.8rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
}

.subtitle {
  margin: 12px 0 0;
  color: var(--muted);
  max-width: 60ch;
  line-height: 1.6;
}

.controls {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.95rem;
}

select, button {
  font: inherit;
}

select {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
}

button.primary {
  border: 0;
  border-radius: 14px;
  padding: 13px 18px;
  font-weight: 700;
  cursor: pointer;
  color: #061120;
  background: linear-gradient(135deg, #fff, #dbeafe 60%, #c4b5fd);
  box-shadow: 0 12px 24px rgba(255,255,255,0.15);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 18px;
}

.stat, .message-box {
  padding: 18px 20px;
}

.stat span, .message-box span, .legend p {
  color: var(--muted);
}

.stat strong, .message-box strong {
  display: block;
  margin-top: 8px;
  font-size: 1.35rem;
}

.message-box {
  grid-column: span 1;
}

.game-shell {
  padding: 18px;
}

.board {
  display: grid;
  grid-template-columns: repeat(6, minmax(90px, 1fr));
  gap: 14px;
}

.card {
  position: relative;
  aspect-ratio: 3 / 4;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
  cursor: pointer;
}

.card.flipped,
.card.matched {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  border-radius: 20px;
  overflow: hidden;
  backface-visibility: hidden;
  border: 1px solid rgba(255,255,255,0.14);
}

.card-front {
  background:
    linear-gradient(135deg, rgba(96,165,250,0.28), rgba(192,132,252,0.22)),
    #091325;
  display: grid;
  place-items: center;
  font-size: clamp(2rem, 5vw, 3rem);
}

.card-front::after {
  content: "?";
  color: white;
  text-shadow: 0 0 25px rgba(255,255,255,0.3);
}

.card-back {
  transform: rotateY(180deg);
  background: #060d18;
}

.card-back img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-name {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 8px;
  padding: 6px 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-align: center;
  border-radius: 999px;
  background: rgba(0,0,0,0.55);
  color: white;
}

.card.matched {
  cursor: default;
}

.card.matched .card-back {
  box-shadow: inset 0 0 0 2px rgba(52,211,153,0.8), 0 0 22px rgba(52,211,153,0.24);
}

.legend {
  margin-top: 18px;
  padding: 18px 20px;
}

.legend h2 {
  margin: 0 0 12px;
}

.legend p {
  margin: 0 0 8px;
  line-height: 1.6;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(2, 8, 23, 0.78);
  display: grid;
  place-items: center;
  z-index: 20;
  padding: 20px;
}

.hidden { display: none; }

.modal-card {
  width: min(520px, 100%);
  padding: 28px;
  text-align: center;
}

.modal-card h2 {
  margin-top: 0;
  font-size: 2rem;
}

.victory-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 22px 0;
}

.victory-stats div {
  background: rgba(255,255,255,0.05);
  border-radius: 16px;
  padding: 14px;
}

.victory-stats span {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.victory-stats strong {
  font-size: 1.2rem;
}

@media (max-width: 980px) {
  .hud { grid-template-columns: repeat(2, 1fr); }
  .board { grid-template-columns: repeat(4, minmax(80px, 1fr)); }
}

@media (max-width: 640px) {
  .topbar { align-items: stretch; flex-direction: column; }
  .hud { grid-template-columns: 1fr; }
  .board { grid-template-columns: repeat(3, minmax(82px, 1fr)); }
  .victory-stats { grid-template-columns: 1fr; }
}