@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

*{
  font-family: 'Poppins', sans-serif;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #0B1215;
  font-family: 'Poppins', sans-serif;
}

button {
  text-transform: uppercase;
}

button:hover {
  transform: translateY(-2px);
}

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

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 95vh;
  width: 100%;
  flex-direction: column;
  color: white;
  padding: 20px;
}

.deck-grid {
  font-family: 'Poppins', sans-serif;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  padding: 20px;
  width: 100%;
  max-width: 1200px;
}

.deck-preview {
  background-color: #ffffff;
  color: #1E2A32;
  border-radius: 15px;
  padding: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  position: relative;
}

.deck-preview:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.prebuilt-deck {
  background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
  background-size: 400% 400%;
  animation: gradient 12s ease infinite;
  color: white;
}

.prebuilt-deck::after {
  content: 'PREBUILT';
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255,255,255,0.2);
  padding: 3px 8px;
  border-radius: 10px;
  font-size: 0.7em;
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.deck-title {
  font-family: 'Poppins', sans-serif !important;
  margin-bottom: 15px;
  font-weight: 600;
  font-size: 1.2em;
}

.deck-content {
  font-size: 0.9em;
  overflow: hidden;
  display: -webkit-box;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  opacity: 0.8;
}

.quiz-styled {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.btns-styled {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.btn-added {
  background: #1E2A32;
  color: white;
  border: none;
  padding: 15px 25px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.progress-styled {
  padding-top: 50px;
  color: antiquewhite;
  font-size: 1.1em;
}

#btn-back {
  position: fixed;
  top: 0;
  left: 0;
  background: #1E2A32;
  color: white;
  border: none;
  font-size: 20px;
  padding: 10px 20px;
  cursor: pointer;
  font-weight: bold;
  transition: 0.3s ease;
  z-index: 1000;
  border-radius: 0 0 5px 0;
}

#btn-back:hover {
  background: #365970;
}

.back-icon {
  display: none;
}

#quizSetup {
  text-align: center;
  margin-top: 40px;
  background: rgba(255,255,255,0.1);
  padding: 30px;
  border-radius: 15px;
}

#quizSetup label {
  display: block;
  margin-bottom: 15px;
  font-size: 1.1em;
}

#quizSetup input {
  padding: 10px;
  font-size: 1em;
  width: 80px;
  border: none;
  border-radius: 5px;
  text-align: center;
}

#startQuiz {
  margin-top: 20px;
  padding: 12px 25px;
  font-size: 1em;
  background-color: #23a6d5;
  color: white;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
}

#startQuiz:hover {
  background-color: #1c8ab1;
  transform: scale(1.05);
}

#progressBarContainer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 10px;
  background: #1E2A32;
  z-index: 1000;
}

#progressBar {
  height: 100%;
  width: 0;
  background: #4CAF50;
  transition: width 0.7s ease;
}

#timerContainer {
  position: fixed;
  top: 20px;
  right: 20px;
  background-color: rgba(30,42,50,0.8);
  color: white;
  padding: 10px 15px;
  border-radius: 20px;
  font-size: 1.2em;
  z-index: 1000;
}

#quizContent {
  margin-top: 60px;
}

.perfect-score-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
  z-index: 9999;
}

.perfect-score-container.show {
  opacity: 1;
  pointer-events: auto;
}

.perfect-score-text {
  font-size: 3rem;
  font-weight: 600;
  color: gold;
  text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }

  100% {
    transform: scale(1);
  }
}

@media (max-width: 1024px) {
  .deck-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .deck-grid {
    grid-template-columns: 1fr;
  }

  #btn-back {
    padding: 10px;
    font-size: 1.2em;
  }

  .back-text {
    display: none;
  }

  .back-icon {
    display: inline;
  }

  .btns-styled {
    grid-template-columns: 1fr;
  }

  #timerContainer {
    top: 10px;
    right: 10px;
    font-size: 1em;
    padding: 5px 10px;
  }

  .perfect-score-text {
    font-size: 2rem;
  }
}