:root {
  --bg-1: #ffe66d;
  --bg-2: #ff7f50;
  --bg-3: #43c6ac;
  --card-back-1: #5f27cd;
  --card-back-2: #341f97;
  --text: #1f1f2b;
  --white: #ffffff;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: "Trebuchet MS", "Comic Sans MS", sans-serif;
  color: var(--text);
  touch-action: manipulation;
}

body {
  background: radial-gradient(circle at 20% 10%, var(--bg-1), transparent 40%),
    radial-gradient(circle at 80% 5%, #ffd6e0, transparent 35%),
    linear-gradient(160deg, var(--bg-2), var(--bg-3));
  display: flex;
  justify-content: center;
  padding: env(safe-area-inset-top) 14px env(safe-area-inset-bottom) 14px;
}

.app {
  width: min(760px, 100%);
}

.topbar {
  text-align: center;
  color: #192a56;
  margin: 8px 0 10px;
}

.topbar h1 {
  font-size: clamp(1.8rem, 5.5vw, 2.6rem);
  margin: 0;
  letter-spacing: 0.02em;
}

.topbar p {
  margin: 6px 0 0;
  font-size: clamp(1rem, 3vw, 1.2rem);
}

.panel {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: end;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 20px;
  padding: 12px;
  box-shadow: var(--shadow);
}

.control {
  display: grid;
  gap: 6px;
  min-width: 180px;
  flex: 1;
}

.panel label {
  font-weight: 700;
}

select,
button {
  border: none;
  border-radius: 14px;
  padding: 10px 14px;
  font-size: 1rem;
}

select {
  min-height: 44px;
}

button {
  min-height: 44px;
  background: #ff9f43;
  color: #ffffff;
  font-weight: 700;
}

button:active {
  transform: scale(0.98);
}

.status {
  margin: 12px 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.status > div {
  background: rgba(255, 255, 255, 0.85);
  border-radius: 14px;
  text-align: center;
  padding: 8px;
  box-shadow: var(--shadow);
}

.board {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(70px, 1fr));
  perspective: 1000px;
}

.card {
  position: relative;
  aspect-ratio: 1 / 1.1;
  border: 0;
  background: none;
  padding: 0;
  cursor: pointer;
}

.card-face {
  position: absolute;
  inset: 0;
  border-radius: 18px;
  display: grid;
  place-items: center;
  backface-visibility: hidden;
  transition: transform 0.45s ease;
  box-shadow: var(--shadow);
}

.card-front {
  background: var(--white);
  transform: rotateY(180deg);
  overflow: hidden;
}

.card-front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-back {
  background: linear-gradient(140deg, var(--card-back-1), var(--card-back-2));
}

.card-back::before {
  content: "?";
  color: #fff;
  font-size: clamp(2rem, 8vw, 3rem);
  font-weight: 800;
}

.card.revealed .card-front,
.card.matched .card-front {
  transform: rotateY(0deg);
}

.card.revealed .card-back,
.card.matched .card-back {
  transform: rotateY(180deg);
}

.card.matched {
  outline: 4px solid #2ecc71;
  border-radius: 20px;
}

.win-box {
  margin: 18px auto;
  padding: 18px;
  text-align: center;
  max-width: 420px;
  background: rgba(255, 255, 255, 0.94);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.win-box h2 {
  margin: 0 0 8px;
  color: #1e3799;
}

.hidden {
  display: none;
}

@media (max-width: 520px) {
  .control {
    min-width: 100%;
  }

  .panel button {
    width: 100%;
  }

  .board {
    grid-template-columns: repeat(3, minmax(72px, 1fr));
  }
}