* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: url('bbgg.jpg') no-repeat center center fixed;
  background-size: cover;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  color: #003366;
}
.welcome-screen {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 50px 35px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  margin: 40px 20px;
  width: 90%;
  max-width: 500px;
  animation: fadeIn 1s ease-out;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.welcome-screen h1 {
  font-size: 2.5rem;
  color: #002244;
  margin-bottom: 20px;
  text-shadow: 1px 2px 4px rgba(255, 255, 255, 0.5);
  font-weight: 700;
}

.welcome-screen p {
  font-size: 1.2rem;
  color: #333;
  margin-bottom: 30px;
  line-height: 1.6;
  font-weight: 500;
}

.welcome-screen button {
  padding: 14px 36px;
  font-size: 1.1rem;
  background: linear-gradient(135deg, #1853f5, #5a6af8);
  color: white;
  border: none;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 10px 25px rgba(88, 106, 248, 0.4);
  transition: all 0.3s ease;
}

.welcome-screen button:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 15px 30px rgba(88, 106, 248, 0.5);
}

.welcome-screen button:active {
  transform: scale(0.95);
  box-shadow: 0 6px 15px rgba(88, 106, 248, 0.3);
}
.welcome-screen button:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(88, 106, 248, 0.5);
}



.game-container {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.15);
  margin: 20px;
  max-width: 90%;
}

#game-board {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  gap: 10px;
  justify-items: center;
  margin-top: 20px;
  padding: 10px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
  gap: 8px;
  justify-content: center;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 10px;
  box-sizing: border-box;
}

/* Small screens */
@media (max-width: 600px) {
  .grid {
    grid-template-columns: repeat(auto-fit, minmax(40px, 1fr));
    gap: 6px;
    max-width: 95vw;
  }

  .card {
    height: 50px;
    font-size: 1.5rem;
  }
}

/* Extra small screens */
@media (max-width: 400px) {
  .grid {
    grid-template-columns: repeat(auto-fit, minmax(35px, 1fr));
    gap: 5px;
  }

  .card {
    height: 45px;
    font-size: 1.3rem;
  }
}


.card {
  background-color: white;
  border: 2px solid #ccc;
  font-size: 1.8rem;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60px;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
}


.card:hover {
  transform: scale(1.1);
  box-shadow: 0 0 10px #0066cc;
}

.card.revealed {
  background-color: #e6f2ff;
}

.card img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

#timer {
  font-size: 1.2rem;
  margin-bottom: 10px;
  font-weight: bold;
  color: #003366;
}
.game-over {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: url('gameo.jpg') no-repeat center center fixed;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 999;
  text-align: center;
  padding: 20px;
}

.game-over h2 {
  font-size: 2rem;
  color: #fff;
  text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.3);
  margin-bottom: 25px;
}

.game-over button {
  padding: 12px 30px;
  font-size: 1.1rem;
  color: white;
  background: linear-gradient(to right, #1853f5, #5a6af8);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.game-over button:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}
.game-over button:active {
  transform: scale(0.95);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}


@keyframes fadeIn {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
.emoji.hidden {
  display: none;
}

.card.flipped .emoji {
  display: block;
}
.emoji {
  font-size: 2rem;
  transition: transform 0.3s ease;
}
.emoji:hover {
  transform: scale(1.2);
}
.card.flipped {
  background-color: #e6f2ff;
  border-color: #004999;
}
.card.flipped .emoji {
  display: block;
}
.card.flipped .emoji.hidden {
  display: none;
}
.card.flipped .emoji.visible {
  display: block;
}
.card.flipped .emoji.visible:hover {
  transform: scale(1.2);
}
.card.flipped .emoji.hidden:hover {
  transform: scale(1);
}
.card.flipped .emoji.visible {
  display: block;
}
.card.flipped .emoji.hidden {
  display: none;
}
.card.flipped .emoji {
  display: block;
  transition: transform 0.3s ease;
}
.card.flipped .emoji:hover {
  transform: scale(1.2);
}
.popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #ffffffcc;
  color: #222;
  padding: 20px 40px;
  font-size: 1.5rem;
  border-radius: 10px;
  z-index: 999;
  box-shadow: 0 0 20px rgba(0,0,0,0.2);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.popup.show {
  opacity: 1;
}

.hidden {
  display: none;
}
@keyframes hinge {
  0% {
    transform: rotate(0deg);
    transform-origin: top left;
    opacity: 1;
  }
  20% {
    transform: rotate(5deg);
  }
  40% {
    transform: rotate(15deg);
  }
  60% {
    transform: rotate(30deg);
    opacity: 0.8;
  }
  80% {
    transform: rotate(70deg);
    opacity: 0.4;
  }
  100% {
    transform: translateY(100vh) rotate(90deg);
    opacity: 0;
  }
}

.hinge-10 {
  animation: hinge 3s linear forwards;
  animation-delay: 0s;
  animation-play-state: paused;
}

.hinge-50 {
  animation: hinge 1.5s linear forwards;
  animation-delay: 0s;
  animation-play-state: paused;
}

.hinge-100 {
  animation: hinge 1s linear forwards;
  animation-delay: 0s;
}
.pulse {
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    color: red;
  }
  50% {
    transform: scale(1.2);
    color: darkred;
  }
  100% {
    transform: scale(1);
    color: red;
  }
}
.pulsing {
  animation: pulse-bg 1s infinite;
}

@keyframes pulse-bg {
  0% { background-color: #fff; }
  50% { background-color: #ffcccc; }
  100% { background-color: #fff; }
}
@keyframes heartbeat {
  0%, 100% {
    transform: scale(1);
  }
  14% {
    transform: scale(1.05);
  }
  28% {
    transform: scale(1);
  }
  42% {
    transform: scale(1.05);
  }
  70% {
    transform: scale(1);
  }
}

.pulsing-effect {
  animation: heartbeat 1.5s ease-in-out infinite;
  transform-origin: center;
}