/* ============================================================
   QUIZ CSS - Centered Layout
   ============================================================ */

.quiz-container {
  max-width: 800px;
  margin: 80px auto;
  padding: 0 20px;
}

.quiz-progress-bar {
  position: fixed;
  top: 64px;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.05);
  z-index: 1000;
}

#quizProgressFill {
  width: 0%;
  height: 100%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan-glow);
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.quiz-card {
  background: rgba(13, 20, 32, 0.45);
  border: 1px solid var(--border);
  border-radius: 32px;
  padding: 50px 45px;
  text-align: center;
  box-shadow: 0 30px 60px rgba(0,0,0,0.5);
  position: relative;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.quiz-card h1 {
  font-size: 36px;
  margin-top: 10px;
  margin-bottom: 16px;
  font-weight: 700;
}

.quiz-card p {
  font-size: 14px;
  color: var(--text2);
  margin-bottom: 35px;
  line-height: 1.6;
}

/* MAIN QUIZ CARD */
.main-quiz-card {
  max-width: 700px;
  margin: 0 auto;
}

.card-badge {
  display: inline-block;
  background: var(--cyan-dim);
  color: var(--cyan);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.question-header { margin-bottom: 20px; }
.question-header span { color: var(--cyan); font-family: var(--mono); font-size: 12px; }
.question-header h2 { font-size: 26px; margin-top: 10px; line-height: 1.3; }

/* CENTERED VIEWER */
.quiz-viewer-container {
  background: rgba(13, 20, 32, 0.3);
  border: 1px solid var(--border2);
  border-radius: 24px;
  margin: 20px 0;
  position: relative;
  overflow: hidden;
  height: 300px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

#quizViewer {
  width: 100%;
  height: 100%;
}

.viewer-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9px;
  color: var(--text3);
  font-family: var(--mono);
  background: rgba(0,0,0,0.4);
  padding: 4px 12px;
  border-radius: 20px;
  pointer-events: none;
}

/* OPTIONS GRID */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-top: 25px;
}

.quiz-option-btn {
  background: rgba(13, 20, 32, 0.45);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 16px;
  color: white;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--sora);
  font-size: 14px;
  font-weight: 600;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.quiz-option-btn:hover {
  border-color: var(--cyan);
  background: rgba(13, 20, 32, 0.6);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3), 0 0 15px var(--cyan-glow);
}

.quiz-option-btn.correct { background: #2ecc71; border-color: #2ecc71; color: #000; box-shadow: 0 0 20px rgba(46, 204, 113, 0.3); }
.quiz-option-btn.wrong { background: #e74c3c; border-color: #e74c3c; color: #fff; opacity: 0.8; box-shadow: 0 0 20px rgba(231, 76, 60, 0.3); }

/* MISC */
.input-group { text-align: left; margin: 25px 0 35px 0; }
.input-group label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--cyan);
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 2px;
}
.input-group input {
  width: 100%;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: white;
  font-family: var(--sans);
  font-size: 14px;
  outline: none;
  transition: all 0.3s ease;
}
.input-group input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 15px var(--cyan-glow);
  background: rgba(255, 255, 255, 0.05);
}

.action-btn {
  width: 100%;
  padding: 16px;
  background: var(--cyan);
  color: #000;
  border: none;
  border-radius: 12px;
  font-family: var(--mono);
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.result-icon { 
  font-size: 84px; 
  margin-bottom: 30px; 
  filter: drop-shadow(0 0 20px rgba(241, 196, 15, 0.4));
}
.result-stats { 
  display: flex; 
  justify-content: center; 
  gap: 50px; 
  margin: 40px 0;
  background: rgba(255,255,255,0.03);
  padding: 30px;
  border-radius: 24px;
  border: 1px solid var(--border);
}
.stat-item .label { 
  display: block; 
  font-size: 12px; 
  color: var(--text3); 
  letter-spacing: 1px;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.stat-item .value { 
  font-size: 42px; 
  font-weight: 700; 
  color: var(--cyan); 
  text-shadow: 0 0 15px var(--cyan-glow);
}
#resultMsg {
  margin: 30px auto;
  line-height: 1.6;
  font-size: 16px;
  max-width: 500px;
}
.quiz-card .action-btn {
  margin-top: 20px;
  max-width: 350px;
  margin-left: auto;
  margin-right: auto;
}

.hidden { display: none !important; }

@media (max-width: 768px) {
  .quiz-container {
    margin: 40px auto;
    padding: 0 15px;
  }
  
  .quiz-card {
    padding: 30px 20px;
    border-radius: 20px;
  }
  
  .quiz-card h1 {
    font-size: 26px;
  }
  
  .question-header h2 {
    font-size: 18px;
    line-height: 1.4;
  }
  
  .quiz-viewer-container {
    height: 220px;
    border-radius: 16px;
  }
  
  .options-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 15px;
  }
  
  .quiz-option-btn {
    padding: 14px;
    font-size: 13px;
    border-radius: 12px;
  }
  
  .result-icon {
    font-size: 60px;
    margin-bottom: 20px;
  }
  
  .result-stats {
    gap: 20px;
    margin: 25px 0;
    padding: 20px;
    border-radius: 16px;
  }
  
  .stat-item .value {
    font-size: 32px;
  }
  
  #resultMsg {
    font-size: 14px;
    margin: 20px auto;
  }
}