:root {
  color-scheme: light;
  --ink: #26342f;
  --muted: #60716a;
  --paper: #f7fff9;
  --panel: #ffffff;
  --mint: #78c6a3;
  --sun: #ffd166;
  --coral: #ef767a;
  --sky: #74c0fc;
  --border: #d9eadf;
  --shadow: 0 12px 30px rgba(30, 75, 58, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(116, 192, 252, 0.32), rgba(247, 255, 249, 0.94)),
    var(--paper);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  letter-spacing: 0;
  touch-action: manipulation;
}

button {
  border: 0;
  color: inherit;
  font: inherit;
}

.app {
  display: grid;
  grid-template-rows: auto auto auto 1fr auto;
  gap: 14px;
  min-height: 100svh;
  padding: max(18px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 850;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1;
}

.score {
  display: grid;
  min-width: 98px;
  min-height: 58px;
  place-items: center;
  border: 3px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  font-size: 1.4rem;
  font-weight: 950;
}

.message-panel,
.sticker-shelf {
  border: 3px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 8px 18px rgba(30, 75, 58, 0.08);
}

.message-panel {
  display: grid;
  min-height: 58px;
  place-items: center;
  padding: 10px 14px;
}

.message-panel p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.25rem, 3vw, 1.8rem);
  font-weight: 900;
}

.sticker-shelf {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 8px 12px;
}

.sticker-title {
  flex: 0 0 auto;
  color: var(--muted);
  font-weight: 900;
}

.stickers {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sticker {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 2px solid var(--sun);
  border-radius: 50%;
  background: #fff3c4;
  box-shadow: 0 5px 12px rgba(30, 75, 58, 0.12);
  font-size: 1.55rem;
}

.sticker.is-empty {
  border-color: var(--border);
  background: #fbfffc;
  color: #bdd0c5;
}

.board {
  display: grid;
  grid-template-columns: repeat(4, minmax(86px, 1fr));
  gap: 12px;
  align-content: center;
}

.card {
  display: grid;
  min-height: 118px;
  place-items: center;
  border: 3px solid #b9ddca;
  border-radius: 8px;
  background: linear-gradient(135deg, #78c6a3, #74c0fc);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.card:active {
  transform: scale(0.97);
}

.card-symbol {
  display: block;
  font-size: clamp(2.8rem, 8vw, 5.3rem);
  line-height: 1;
}

.card:not(.is-open) .card-symbol {
  color: #ffffff;
  font-size: clamp(2.5rem, 7vw, 4.8rem);
}

.card.is-open,
.card.is-matched {
  border-color: var(--mint);
  background: var(--panel);
}

.card.is-matched {
  animation: pop 420ms ease;
}

.card.is-wrong {
  border-color: var(--coral);
  animation: shake 280ms ease;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.control-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.chip,
.reset-button {
  min-height: 54px;
  border: 3px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  padding: 0 18px;
  box-shadow: 0 8px 18px rgba(30, 75, 58, 0.1);
  font-weight: 900;
}

.chip.is-active {
  border-color: var(--sky);
  background: #ecf8ff;
}

.reset-button {
  border-color: var(--sun);
  background: #fff3c4;
}

@keyframes pop {
  0% { transform: scale(1); }
  45% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

@media (max-width: 760px) {
  .app {
    gap: 10px;
    padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
  }

  .board {
    grid-template-columns: repeat(3, minmax(86px, 1fr));
    gap: 10px;
  }

  .card {
    min-height: 98px;
  }

  .controls {
    justify-content: stretch;
  }

  .control-group,
  .reset-button {
    flex: 1 1 100%;
  }

  .chip,
  .reset-button {
    flex: 1;
  }
}