/* ============================================
   FULLSCREEN TEST MODE
   Zvonalitik Academy — Immersive Test Experience
   ============================================ */

/* === Fullscreen Overlay === */
.fullscreen-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: linear-gradient(180deg, #0F172A 0%, #1E293B 100%);
  display: flex;
  flex-direction: column;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.fullscreen-overlay--active {
  opacity: 1;
  visibility: visible;
}

/* Body scroll lock when fullscreen is active */
body.fullscreen-active {
  overflow: hidden;
  position: fixed;
  width: 100%;
  height: 100%;
}

/* === Fullscreen Header === */
.fullscreen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-dark);
  flex-shrink: 0;
}

.fullscreen-header__left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.fullscreen-header__title {
  font-size: 16px;
  font-weight: 600;
  color: white;
}

.fullscreen-header__progress-text {
  font-size: 14px;
  color: var(--text-muted);
}

.fullscreen-header__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--dark-alt);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.fullscreen-header__close:hover {
  background: var(--dark-lighter);
  color: white;
  border-color: var(--text-muted);
}

.fullscreen-header__close i {
  width: 20px;
  height: 20px;
}

/* === Progress Bar === */
.fullscreen-progress {
  height: 4px;
  background: var(--dark-lighter);
  flex-shrink: 0;
  overflow: hidden;
}

.fullscreen-progress__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 0 2px 2px 0;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.fullscreen-progress__bar::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 20px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
  animation: progressShine 1.5s ease-in-out infinite;
}

@keyframes progressShine {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

/* === Content Area === */
.fullscreen-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow: hidden;
  position: relative;
}

.fullscreen-content__wrapper {
  width: 100%;
  max-width: 640px;
  position: relative;
}

/* === Question Slides Container === */
.fullscreen-slides {
  position: relative;
  overflow: hidden;
}

.fullscreen-slide {
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
  opacity: 0;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s ease;
  pointer-events: none;
}

.fullscreen-slide--active {
  position: relative;
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.fullscreen-slide--prev {
  transform: translateX(-100%);
  opacity: 0;
}

.fullscreen-slide--next {
  transform: translateX(100%);
  opacity: 0;
}

/* Slide exit animations */
.fullscreen-slide--exit-left {
  transform: translateX(-100%);
  opacity: 0;
}

.fullscreen-slide--exit-right {
  transform: translateX(100%);
  opacity: 0;
}

/* === Question Card (Fullscreen) === */
.fullscreen-question {
  background: white;
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-xl);
}

.fullscreen-question__number {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  padding: 6px 12px;
  background: var(--primary-light);
  border-radius: 100px;
}

.fullscreen-question__text {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 32px;
}

@media (max-width: 640px) {
  .fullscreen-question__text {
    font-size: 20px;
  }
}

/* === Answer Options (Fullscreen) === */
.fullscreen-answers {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.fullscreen-answer {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg-alt);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* Large touch targets for mobile */
@media (max-width: 640px) {
  .fullscreen-answer {
    padding: 18px 20px;
    min-height: 64px;
  }
}

.fullscreen-answer:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.fullscreen-answer:active {
  transform: scale(0.98);
}

.fullscreen-answer--selected {
  border-color: var(--primary);
  background: var(--primary-light);
}

.fullscreen-answer--correct {
  border-color: var(--success);
  background: var(--success-light);
  pointer-events: none;
}

.fullscreen-answer--wrong {
  border-color: var(--error);
  background: var(--error-light);
  pointer-events: none;
}

.fullscreen-answer--disabled {
  pointer-events: none;
  opacity: 0.6;
}

.fullscreen-answer__indicator {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border);
  border-radius: 50%;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
}

.fullscreen-answer--checkbox .fullscreen-answer__indicator {
  border-radius: var(--radius-sm);
}

.fullscreen-answer--selected .fullscreen-answer__indicator {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
}

.fullscreen-answer--correct .fullscreen-answer__indicator {
  border-color: var(--success);
  background: var(--success);
  color: white;
}

.fullscreen-answer--wrong .fullscreen-answer__indicator {
  border-color: var(--error);
  background: var(--error);
  color: white;
}

.fullscreen-answer__indicator i {
  width: 16px;
  height: 16px;
}

.fullscreen-answer__text {
  font-size: 17px;
  color: var(--text-primary);
  line-height: 1.5;
  flex: 1;
}

/* Keyboard shortcut hint */
.fullscreen-answer__key {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 4px 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.fullscreen-answers:hover .fullscreen-answer__key,
.fullscreen-content--keyboard .fullscreen-answer__key {
  opacity: 1;
}

@media (max-width: 768px) {
  .fullscreen-answer__key {
    display: none;
  }
}

/* === Feedback Message === */
.fullscreen-feedback {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  margin-top: 20px;
  animation: feedbackSlide 0.3s ease;
}

@keyframes feedbackSlide {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fullscreen-feedback--correct {
  background: var(--success-light);
  border: 1px solid var(--success);
}

.fullscreen-feedback--wrong {
  background: var(--error-light);
  border: 1px solid var(--error);
}

.fullscreen-feedback__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.fullscreen-feedback--correct .fullscreen-feedback__icon {
  color: var(--success);
}

.fullscreen-feedback--wrong .fullscreen-feedback__icon {
  color: var(--error);
}

.fullscreen-feedback__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
}

/* === Footer Actions === */
.fullscreen-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-top: 1px solid var(--border-dark);
  flex-shrink: 0;
}

.fullscreen-footer__hints {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.fullscreen-footer__hint {
  display: flex;
  align-items: center;
  gap: 6px;
}

.fullscreen-footer__hint kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  background: var(--dark-alt);
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-light);
}

@media (max-width: 768px) {
  .fullscreen-footer__hints {
    display: none;
  }
}

.fullscreen-footer__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fullscreen-footer__btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.fullscreen-footer__btn--primary {
  background: var(--primary);
  color: white;
}

.fullscreen-footer__btn--primary:hover {
  background: var(--primary-hover);
}

.fullscreen-footer__btn--primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.fullscreen-footer__btn--secondary {
  background: var(--dark-alt);
  border: 1px solid var(--border-dark);
  color: var(--text-light);
}

.fullscreen-footer__btn--secondary:hover {
  background: var(--dark-lighter);
  border-color: var(--text-muted);
}

.fullscreen-footer__btn i {
  width: 18px;
  height: 18px;
}

/* === Results Screen === */
.fullscreen-results {
  text-align: center;
  padding: 60px 40px;
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

.fullscreen-results__icon {
  width: 100px;
  height: 100px;
  margin: 0 auto 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  animation: resultsPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes resultsPop {
  0% { transform: scale(0); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.fullscreen-results--passed .fullscreen-results__icon {
  background: var(--success);
  box-shadow: 0 0 60px rgba(16, 185, 129, 0.4);
}

.fullscreen-results--failed .fullscreen-results__icon {
  background: var(--error);
  box-shadow: 0 0 60px rgba(239, 68, 68, 0.4);
}

.fullscreen-results__icon i {
  width: 48px;
  height: 48px;
  color: white;
}

.fullscreen-results__title {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.fullscreen-results__subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.fullscreen-results__stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 40px;
}

.fullscreen-results__stat {
  text-align: center;
}

.fullscreen-results__stat-value {
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
}

.fullscreen-results--passed .fullscreen-results__stat-value {
  color: var(--success);
}

.fullscreen-results--failed .fullscreen-results__stat-value {
  color: var(--error);
}

.fullscreen-results__stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

.fullscreen-results__actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* Success Animation (confetti effect via box-shadows) */
.fullscreen-results--passed::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  animation: confettiRain 2s ease-out;
  opacity: 0;
}

@keyframes confettiRain {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

/* Error Animation (shake) */
.fullscreen-results--failed {
  animation: shake 0.5s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

/* === Touch/Swipe Indicator === */
.fullscreen-swipe-hint {
  position: absolute;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 100px;
  font-size: 13px;
  color: white;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.fullscreen-swipe-hint--visible {
  opacity: 1;
  animation: swipeHintPulse 2s ease-in-out infinite;
}

@keyframes swipeHintPulse {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

.fullscreen-swipe-hint i {
  width: 16px;
  height: 16px;
}

/* === Loading State === */
.fullscreen-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 60px;
}

.fullscreen-loading__spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-dark);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.fullscreen-loading__text {
  font-size: 16px;
  color: var(--text-muted);
}

/* === Mobile Optimizations === */
@media (max-width: 640px) {
  .fullscreen-header {
    padding: 12px 16px;
  }

  .fullscreen-header__title {
    font-size: 14px;
  }

  .fullscreen-content {
    padding: 16px;
  }

  .fullscreen-question {
    padding: 24px 20px;
    border-radius: var(--radius-lg);
  }

  .fullscreen-question__text {
    font-size: 18px;
    margin-bottom: 24px;
  }

  .fullscreen-answers {
    gap: 10px;
  }

  .fullscreen-answer {
    padding: 16px;
  }

  .fullscreen-answer__text {
    font-size: 15px;
  }

  .fullscreen-footer {
    padding: 12px 16px;
  }

  .fullscreen-footer__btn {
    padding: 10px 20px;
    font-size: 14px;
  }

  .fullscreen-results {
    padding: 40px 24px;
  }

  .fullscreen-results__stats {
    gap: 32px;
  }

  .fullscreen-results__stat-value {
    font-size: 36px;
  }

  .fullscreen-results__actions {
    flex-direction: column;
  }

  .fullscreen-results__actions .fullscreen-footer__btn {
    width: 100%;
    justify-content: center;
  }
}

/* === Order Questions (Fullscreen) === */
.fullscreen-question .test-order {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fullscreen-question .test-order__item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-alt);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: grab;
  transition: all var(--transition-fast);
  user-select: none;
}

.fullscreen-question .test-order__item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.fullscreen-question .test-order__item:active,
.fullscreen-question .test-order__item.dragging {
  cursor: grabbing;
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
}

.fullscreen-question .test-order__handle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--text-secondary);
  flex-shrink: 0;
  opacity: 0.7;
}

.fullscreen-question .test-order__handle i {
  width: 18px;
  height: 18px;
}

.fullscreen-question .test-order__number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: white;
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.fullscreen-question .test-order__text {
  font-size: 16px;
  color: var(--text-primary);
  line-height: 1.5;
}

/* Order states */
.fullscreen-question .test-order__item--correct {
  border-color: var(--success);
  background: var(--success-light);
}

.fullscreen-question .test-order__item--correct .test-order__number {
  background: var(--success);
}

.fullscreen-question .test-order__item--wrong {
  border-color: var(--error);
  background: var(--error-light);
}

.fullscreen-question .test-order__item--wrong .test-order__number {
  background: var(--error);
}

/* Order drag states */
.fullscreen-question .test-order__item--dragging {
  opacity: 0.5;
  transform: scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.fullscreen-question .test-order__item--drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
}

/* Question hint text */
.fullscreen-question__hint {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-tertiary);
  text-align: center;
}

/* === Match Questions (Fullscreen) === */
.fullscreen-question .test-match {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fullscreen-question .test-match__row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.fullscreen-question .test-match__left {
  flex: 1;
  padding: 14px 18px;
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--text-primary);
}

.fullscreen-question .test-match__select {
  flex: 1;
  padding: 14px 18px;
  background: white;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.fullscreen-question .test-match__select:hover,
.fullscreen-question .test-match__select:focus {
  border-color: var(--primary);
  outline: none;
}

/* === Fill Questions (Fullscreen) === */
.fullscreen-question .test-fill {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fullscreen-question .test-fill__template {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.fullscreen-question .test-fill__input {
  width: 100%;
  padding: 16px 20px;
  background: white;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 17px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.fullscreen-question .test-fill__input:hover {
  border-color: var(--text-tertiary);
}

.fullscreen-question .test-fill__input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 4px var(--primary-light);
}

.fullscreen-question .test-fill__input::placeholder {
  color: var(--text-tertiary);
}

/* Mobile optimizations for special question types */
@media (max-width: 640px) {
  .fullscreen-question .test-order__item {
    padding: 14px 16px;
  }

  .fullscreen-question .test-order__text {
    font-size: 14px;
  }

  .fullscreen-question .test-match__row {
    flex-direction: column;
    gap: 8px;
  }

  .fullscreen-question .test-match__left,
  .fullscreen-question .test-match__select {
    width: 100%;
  }
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
  .fullscreen-overlay,
  .fullscreen-slide,
  .fullscreen-answer,
  .fullscreen-progress__bar,
  .fullscreen-feedback,
  .fullscreen-results__icon {
    transition: none;
    animation: none;
  }
}

/* === Dark Mode Support (already dark by default) === */
/* If needed for future light mode toggle */
.fullscreen-overlay--light {
  background: linear-gradient(180deg, #F8FAFC 0%, #E2E8F0 100%);
}

.fullscreen-overlay--light .fullscreen-header,
.fullscreen-overlay--light .fullscreen-footer {
  border-color: var(--border);
}

.fullscreen-overlay--light .fullscreen-header__title,
.fullscreen-overlay--light .fullscreen-footer__hints {
  color: var(--text-secondary);
}