:root {
  --bg: #EAF6F3;
  --surface: #FFFFFF;
  --primary: #FF6B6B;
  --primary-dark: #E85A5A;
  --secondary: #4EC9B0;
  --secondary-dark: #38B39C;
  --accent-yellow: #FFD166;
  --text: #1B3A4B;
  --text-soft: #4A6572;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow-card: 0 10px 24px rgba(27, 58, 75, 0.12);
  --font-main: ui-rounded, "Segoe UI Rounded", "SF Pro Rounded", "Nunito",
    "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

button {
  font-family: inherit;
  touch-action: manipulation;
  cursor: pointer;
  border: none;
}

#app {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

/* Header */

.app-header {
  text-align: center;
  padding: 12px 0 20px;
}

.mascot {
  font-size: 56px;
  line-height: 1;
  animation: bob 2.4s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.app-header h1 {
  margin: 8px 0 4px;
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-dark);
}

.tagline {
  margin: 0;
  color: var(--text-soft);
  font-size: 17px;
}

/* Views */

.view { width: 100%; }

/* Game selection grid */

.game-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (min-width: 560px) {
  .game-grid { grid-template-columns: 1fr 1fr 1fr; }
}

.game-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 22px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  min-height: 140px;
  border-bottom: 6px solid var(--card-accent, var(--primary));
  transition: transform 0.15s ease;
}

.game-card:active {
  transform: scale(0.96);
}

.game-icon {
  font-size: 40px;
  line-height: 1;
}

.game-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  line-height: 1.25;
}

/* Game view */

.view-game { display: flex; flex-direction: column; gap: 16px; }

.btn-back {
  align-self: flex-start;
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  font-size: 16px;
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: var(--shadow-card);
}

.btn-back:active { transform: scale(0.96); }

#game-container {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 20px 16px;
  min-height: 300px;
}

.game-heading {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary-dark);
  text-align: center;
}

.game-sub {
  margin: 0 0 18px;
  color: var(--text-soft);
  text-align: center;
  font-size: 15px;
}

/* Buttons (shared) */

.btn-primary, .btn-secondary {
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 700;
  font-size: 15px;
  min-height: 44px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:active { background: var(--primary-dark); }

.btn-secondary {
  background: var(--bg);
  color: var(--text);
}

.btn-secondary:active { background: #dcede8; }

/* Coming soon placeholder */

.coming-soon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
  padding: 30px 10px;
}

.coming-soon .big-icon { font-size: 54px; }

/* Memorice game */

.memo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  max-width: 420px;
  margin: 0 auto;
}

@media (max-width: 380px) {
  .memo-grid { grid-template-columns: repeat(3, 1fr); }
}

.memo-status {
  text-align: center;
  color: var(--text-soft);
  font-weight: 700;
  margin-bottom: 14px;
}

.memo-card {
  aspect-ratio: 1 / 1;
  perspective: 800px;
  background: none;
  padding: 0;
}

.memo-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.35s ease;
  border-radius: var(--radius-sm);
}

.memo-card.is-flipped .memo-card-inner,
.memo-card.is-matched .memo-card-inner {
  transform: rotateY(180deg);
}

.memo-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  backface-visibility: hidden;
  font-size: 30px;
}

.memo-face-back {
  background: var(--secondary);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
}

.memo-face-front {
  background: var(--surface);
  border: 2px solid var(--bg);
  transform: rotateY(180deg);
}

.memo-card.is-matched .memo-face-front {
  background: #FFF3D6;
  border-color: var(--accent-yellow);
}

.memo-complete {
  text-align: center;
  padding: 20px 0 6px;
}

.memo-complete .big-icon { font-size: 50px; }

/* Popup */

.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(27, 58, 75, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}

.popup-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  max-width: 360px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 40px rgba(27, 58, 75, 0.25);
}

.popup-icon {
  font-size: 48px;
  margin-bottom: 8px;
}

.popup-card h2 {
  margin: 0 0 10px;
  font-size: 21px;
  color: var(--primary-dark);
}

.popup-card p {
  margin: 0 0 20px;
  color: var(--text);
  font-size: 16px;
  line-height: 1.45;
}

.popup-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (prefers-reduced-motion: reduce) {
  .mascot { animation: none; }
  .memo-card-inner { transition: none; }
}