/* Quiz View Layout */
.quiz-container {
  max-width: 700px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.quiz-progress-bar-container {
  width: 100%;
  margin-bottom: 2rem;
}

.quiz-progress-text {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
}

.quiz-progress-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  width: 0;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  border-radius: 50px;
  transition: width var(--transition-normal);
}

.flashcard-wrapper {
  perspective: 1200px;
  width: 100%;
  margin-bottom: 1.5rem;
}

.flashcard-wrapper.has-image {
  margin-bottom: 1.5rem;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  transform-style: preserve-3d;
  transition: transform var(--transition-slow);
  
  /* Use CSS Grid to overlap the front and back faces automatically determining height */
  display: grid;
  grid-template-areas: "cardface";
}

/* When flipped */
.flashcard-wrapper.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

/* Front & Back standard sizing */
.flashcard-front, .flashcard-back {
  grid-area: cardface;
  width: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: var(--border-neon);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Backcard is pre-rotated */
.flashcard-back {
  transform: rotateY(180deg);
  border-color: rgba(0, 210, 255, 0.4);
}

/* Content Elements */
.question-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: white;
  line-height: 1.4;
  margin-bottom: 1rem;
}

.question-image-container {
  width: 100%;
  height: auto;
  max-height: 200px;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  margin-bottom: 1rem;
  cursor: zoom-in;
  border: 1px solid rgba(0, 210, 255, 0.2);
  position: relative;
  background: #091322;
}

.question-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform var(--transition-normal);
}

.question-image-container:hover .question-image {
  transform: scale(1.03);
}

.question-image-container::after {
  content: 'Clic para ampliar';
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(10, 20, 36, 0.85);
  color: var(--accent);
  border: 1px solid rgba(0, 210, 255, 0.2);
  font-size: 0.75rem;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  pointer-events: none;
  font-weight: 600;
}

/* Alternatives Options */
.alternatives-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  width: 100%;
}

.alternative-option {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(0, 210, 255, 0.15);
  background: rgba(10, 20, 36, 0.7);
  border-radius: var(--border-radius-md);
  text-align: left;
  font-size: 0.95rem;
  font-weight: 500;
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 1rem;
  position: relative;
  overflow: hidden;
}

.alternative-option:hover:not(:disabled) {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: rgba(0, 210, 255, 0.08);
  box-shadow: 0 4px 15px rgba(0, 210, 255, 0.15);
}

.alternative-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.05);
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.alternative-option:hover:not(:disabled) .alternative-badge {
  background: var(--accent);
  color: #060e1b;
  box-shadow: 0 0 8px var(--accent);
}

/* Feedback states */
.alternative-option.correct {
  border-color: var(--success);
  background-color: rgba(0, 230, 118, 0.08);
  color: #a7f3d0;
  box-shadow: var(--shadow-glow-success);
}

.alternative-option.correct .alternative-badge {
  background-color: var(--success);
  color: #052e16;
  box-shadow: 0 0 10px var(--success);
}

.alternative-option.wrong {
  border-color: var(--danger);
  background-color: rgba(255, 23, 68, 0.08);
  color: #fecdd3;
  box-shadow: var(--shadow-glow-danger);
}

.alternative-option.wrong .alternative-badge {
  background-color: var(--danger);
  color: #4c0519;
  box-shadow: 0 0 10px var(--danger);
}

.alternative-option:disabled {
  cursor: not-allowed;
  opacity: 0.8;
}

/* Wrong answer shake effect */
.flashcard-wrapper.shake {
  animation: shake 0.5s ease-in-out;
}

/* Correct answer glowing effect */
.flashcard-wrapper.correct-glow {
  box-shadow: var(--shadow-glow-success), var(--shadow-lg);
}

/* Backcard details styles */
.back-header {
  border-bottom: 1px solid rgba(0, 210, 255, 0.15);
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
}

.back-badge {
  display: inline-block;
  background: rgba(0, 230, 118, 0.1);
  color: var(--success);
  border: 1px solid rgba(0, 230, 118, 0.25);
  padding: 0.35rem 0.8rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.correct-answer-text {
  font-size: 1.15rem;
  font-weight: 600;
  color: white;
}

.explanation-section {
  flex: 1;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.explanation-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.explanation-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #b0c7e2;
}

/* Study feedback buttons */
.feedback-actions {
  display: flex;
  gap: 1rem;
  width: 100%;
  margin-top: 1.5rem;
}

.btn-feedback {
  flex: 1;
  padding: 1.1rem;
  border-radius: var(--border-radius-md);
  font-size: 1.05rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
}

.btn-know {
  border-color: rgba(0, 230, 118, 0.3);
  color: #a7f3d0;
}

.btn-know:hover {
  background: rgba(0, 230, 118, 0.15);
  border-color: var(--success);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 230, 118, 0.25);
  color: var(--success);
}

.btn-know svg {
  color: var(--success);
}

.btn-dontknow {
  border-color: rgba(255, 23, 68, 0.3);
  color: #fecdd3;
}

.btn-dontknow:hover {
  background: rgba(255, 23, 68, 0.15);
  border-color: var(--danger);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 23, 68, 0.25);
  color: var(--danger);
}

.btn-dontknow svg {
  color: var(--danger);
}

.btn-feedback:active {
  transform: translateY(0);
}

/* Animations for deck slide-in/out */
.slide-out-left {
  animation: slideOutLeft var(--transition-normal) forwards;
}

.slide-in-right {
  animation: slideInRight var(--transition-normal) forwards;
}

@keyframes slideOutLeft {
  0% { transform: translate3d(0, 0, 0); opacity: 1; filter: blur(0); }
  100% { transform: translate3d(-100px, 0, 0); opacity: 0; filter: blur(4px); }
}

@keyframes slideInRight {
  0% { transform: translate3d(100px, 0, 0); opacity: 0; filter: blur(4px); }
  100% { transform: translate3d(0, 0, 0); opacity: 1; filter: blur(0); }
}

/* Skip Button */
.btn-skip {
  margin-top: 1.5rem;
  width: 100%;
  padding: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  border-radius: var(--border-radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-skip:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-skip:active {
  transform: translateY(0);
}

/* Exit Deck Button */
.btn-exit-deck {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 12px 24px;
  background: rgba(255, 23, 68, 0.15);
  color: #fecdd3;
  border: 1px solid rgba(255, 23, 68, 0.3);
  border-radius: var(--border-radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-exit-deck svg {
  color: var(--danger);
}

.btn-exit-deck:hover {
  background: rgba(255, 23, 68, 0.25);
  color: white;
  border-color: var(--danger);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 23, 68, 0.25);
}

.btn-exit-deck:active {
  transform: translateY(0);
}