:root {
  --bg-color: #f5f7fa;
  --card-bg: #ffffff;
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --accent-color: #4299e1;
  --accent-hover: #3182ce;
  --border-color: #e2e8f0;
  --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-heavy: 0 10px 15px rgba(0, 0, 0, 0.1);
  --success-color: #48bb78;
  --error-color: #f56565;
  --warning-color: #ed8936;
  --info-color: #38b2ac;
  --german-text: #2b6cb0;
  --meaning-text: #553c9a;

  --masculine-color: #3182ce;
  --masculine-light: rgba(49, 130, 206, 0.1);
  --feminine-color: #e53e3e;
  --feminine-light: rgba(229, 62, 62, 0.1);
  --neuter-color: #38a169;
  --neuter-light: rgba(56, 161, 105, 0.1);
  --plural-color: #d69e2e;
  --plural-light: rgba(214, 158, 46, 0.1);

  --mastered-color: #38a169;
  --learning-color: #ed8936;
  --new-color: #718096;
}

[data-theme="dark"] {
  --bg-color: #1a202c;
  --card-bg: #2d3748;
  --text-primary: #f7fafc;
  --text-secondary: #e2e8f0;
  --accent-color: #63b3ed;
  --accent-hover: #4299e1;
  --border-color: #4a5568;
  --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-heavy: 0 10px 15px rgba(0, 0, 0, 0.3);
  --german-text: #90cdf4;
  --meaning-text: #b794f6;

  --masculine-color: #63b3ed;
  --masculine-light: rgba(99, 179, 237, 0.2);
  --feminine-color: #fc8181;
  --feminine-light: rgba(252, 129, 129, 0.2);
  --neuter-color: #68d391;
  --neuter-light: rgba(104, 211, 145, 0.2);
  --plural-color: #f6e05e;
  --plural-light: rgba(246, 224, 94, 0.2);
}
[data-theme="dark"] .btn.secondary {
  color: var(--bg-color);
  font-weight: 600;
}

[data-theme="dark"] .btn.secondary:hover {
  color: var(--bg-color);
}
[data-theme="dark"] .lesson-btn {
  background-color: #4a5568 !important;
  border-color: #718096 !important;
  color: #e2e8f0 !important;
}

[data-theme="dark"] .lesson-btn:hover {
  background-color: var(--accent-hover) !important;
  border-color: var(--accent-hover) !important;
}

[data-theme="dark"] .lesson-btn.active {
  background-color: var(--accent-color) !important;
  border-color: var(--accent-color) !important;
}

.gender-masculine {
  border-left: 4px solid var(--masculine-color);
  background: linear-gradient(135deg, var(--card-bg), var(--masculine-light));
}

.gender-feminine {
  border-left: 4px solid var(--feminine-color);
  background: linear-gradient(135deg, var(--card-bg), var(--feminine-light));
}

.gender-neuter {
  border-left: 4px solid var(--neuter-color);
  background: linear-gradient(135deg, var(--card-bg), var(--neuter-light));
}

.gender-plural {
  border-left: 4px solid var(--plural-color);
  background: linear-gradient(135deg, var(--card-bg), var(--plural-light));
}

.gender-indicator {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: bold;
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.gender-indicator.masculine {
  background: var(--masculine-color);
}

.gender-indicator.feminine {
  background: var(--feminine-color);
}

.gender-indicator.neuter {
  background: var(--neuter-color);
}

.gender-indicator.plural {
  background: var(--plural-color);
}

.progress-indicator {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.progress-new {
  background: var(--new-color);
  color: white;
}
.progress-learning {
  background: var(--learning-color);
  color: white;
}
.progress-mastered {
  background: var(--mastered-color);
  color: white;
}

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

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: all 0.3s ease;
  -webkit-tap-highlight-color: transparent;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

.header {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-color);
  margin-bottom: 16px;
  text-align: center;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  align-items: center;
  margin-bottom: 16px;
}

.controls .btn {
  flex: 1;
  min-width: 140px;
  justify-content: center;
  white-space: nowrap;
  padding: 10px 12px;
}

#shuffleBtn {
  flex: 1;
  min-width: 140px;
  justify-content: center;
  white-space: nowrap;
  padding: 10px 12px;
}

.btn {
  background: var(--accent-color);
  color: white;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  touch-action: manipulation;
  white-space: nowrap;
}

.btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

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

.btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.btn.active {
  background: var(--success-color);
}

.btn.secondary {
  background: var(--text-secondary);
}

.btn.secondary:hover {
  background: var(--text-primary);
}

.search-input {
  padding: 10px 14px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  background: var(--card-bg);
  color: var(--text-primary);
  min-width: 180px;
  min-height: 40px;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.theme-toggle {
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  min-height: 40px;
  min-width: 40px;
}

.toggle-group {
  display: flex;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.toggle-btn {
  background: transparent;
  border: none;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 36px;
  flex: 1;
  justify-content: center;
}

.toggle-btn.active {
  background: var(--accent-color);
  color: white;
}

.submenu {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.submenu.hidden {
  display: none;
}

.submenu .btn {
  font-size: 12px;
  padding: 8px 12px;
  min-height: 36px;
  flex: 1;
  min-width: 140px;
  justify-content: center;
  white-space: nowrap;
}

.gender-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 50%;
}

.legend-color.masculine {
  background: var(--masculine-color);
}
.legend-color.feminine {
  background: var(--feminine-color);
}
.legend-color.neuter {
  background: var(--neuter-color);
}
.legend-color.plural {
  background: var(--plural-color);
}

.flashcards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.flashcard {
  position: relative;
  width: 100%;
  height: 180px;
  perspective: 1000px;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 12px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  font-size: 1.1rem;
  font-weight: 600;
  gap: 8px;
}

.flashcard-front {
  color: var(--german-text);
}

.flashcard-back {
  color: var(--meaning-text);
  transform: rotateY(180deg);
}

/* Plural display in flashcards */
.flashcard-plural {
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 4px;
  padding: 4px 10px;
  background: rgba(214, 158, 46, 0.1);
  border-radius: 6px;
}

/* Verb forms display in flashcards */
.flashcard-verb-forms {
  font-size: 0.8rem;
  font-weight: 500;
  margin-top: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-align: center;
}

.flashcard-verb-forms span {
  padding: 2px 8px;
  background: rgba(66, 153, 225, 0.1);
  border-radius: 4px;
}

.flashcard:hover .flashcard-inner {
  transform: scale(1.02);
}

.flashcard.flipped:hover .flashcard-inner {
  transform: rotateY(180deg) scale(1.02);
}

.flashcard:focus {
  outline: 3px solid var(--accent-color);
  outline-offset: 2px;
}

.sentence-practice {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  margin-top: 20px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.practice-word {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  color: white;
  padding: 16px 24px;
  border-radius: 12px;
  text-align: center;
  margin-bottom: 20px;
  font-size: 1.3rem;
  font-weight: 600;
}

.scramble-container {
  display: grid;
  gap: 20px;
  margin-bottom: 20px;
}

.word-bank,
.answer-area {
  min-height: 80px;
  padding: 16px;
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  background: var(--bg-color);
  transition: all 0.3s ease;
}

.word-bank {
  background: rgba(66, 153, 225, 0.05);
}

.word-bank.drag-over {
  border-color: var(--accent-color);
  background: rgba(66, 153, 225, 0.1);
}

.answer-area {
  background: rgba(72, 187, 120, 0.05);
  border-style: solid;
  min-height: 100px;
}

.answer-area.drag-over {
  border-color: var(--success-color);
  background: rgba(72, 187, 120, 0.1);
}

.area-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-align: center;
}

.word-button {
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 16px;
  margin: 4px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  display: inline-block;
  user-select: none;
  touch-action: manipulation;
}

.word-button:hover {
  border-color: var(--accent-color);
  background: rgba(66, 153, 225, 0.1);
  transform: translateY(-1px);
}

.word-button:active {
  transform: translateY(0);
}

.word-button.dragging {
  opacity: 0.5;
  transform: rotate(5deg);
}

.practice-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

#prevSentenceBtn,
#nextSentenceBtn,
#prevClozeBtn,
#nextClozeBtn {
  flex: 1;
  min-width: 120px;
  justify-content: center;
}

.feedback-section {
  margin-top: 20px;
  padding: 20px;
  border-radius: 12px;
  border: 2px solid var(--border-color);
}

.feedback-section.success {
  background: rgba(72, 187, 120, 0.1);
  border-color: var(--success-color);
}

.feedback-section.error {
  background: rgba(245, 101, 101, 0.1);
  border-color: var(--error-color);
}

.feedback-title {
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.explanation-box {
  background: rgba(56, 178, 172, 0.1);
  border: 1px solid var(--info-color);
  border-radius: 8px;
  padding: 16px;
  margin-top: 12px;
}

.explanation-box h4 {
  color: var(--info-color);
  margin-bottom: 8px;
  font-size: 14px;
}

.grammar-drill {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  margin-top: 20px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.quiz-question {
  text-align: center;
  margin-bottom: 20px;
}

.quiz-question h3 {
  font-size: 1.4rem;
  margin-bottom: 16px;
  color: var(--accent-color);
}

.word-display {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--german-text);
  margin-bottom: 20px;
  padding: 20px;
  background: linear-gradient(
    135deg,
    rgba(66, 153, 225, 0.1),
    rgba(56, 178, 172, 0.1)
  );
  border-radius: 12px;
}

.article-options {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.article-btn {
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.2s ease;
  min-width: 80px;
}

.article-btn:hover {
  border-color: var(--accent-color);
  background: rgba(66, 153, 225, 0.1);
  transform: translateY(-2px);
}

.article-btn.correct {
  background: var(--success-color);
  border-color: var(--success-color);
  color: white;
}

.article-btn.incorrect {
  background: var(--error-color);
  border-color: var(--error-color);
  color: white;
}

.quiz-input {
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  background: var(--card-bg);
  color: var(--text-primary);
  width: 100%;
  max-width: 300px;
  margin: 8px;
}

.quiz-input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.quiz-input.correct {
  border-color: var(--success-color);
  background: rgba(72, 187, 120, 0.1);
}

.quiz-input.incorrect {
  border-color: var(--error-color);
  background: rgba(245, 101, 101, 0.1);
}

.input-group {
  margin: 12px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.input-label {
  font-weight: 600;
  min-width: 80px;
  color: var(--text-primary);
}

.quiz-controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 20px;
}

.quiz-feedback {
  margin-top: 20px;
  padding: 16px;
  border-radius: 8px;
  text-align: center;
  font-weight: 600;
}

.quiz-feedback.correct {
  background: rgba(72, 187, 120, 0.1);
  border: 2px solid var(--success-color);
  color: var(--success-color);
}

.quiz-feedback.incorrect {
  background: rgba(245, 101, 101, 0.1);
  border: 2px solid var(--error-color);
  color: var(--error-color);
}

.pagination-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
}

.page-btn {
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  min-width: 40px;
}

.page-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.page-btn.active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
  cursor: default;
}

.word-list {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
  overflow: hidden;
  margin-top: 20px;
}

.word-list table {
  width: 100%;
  border-collapse: collapse;
}

.word-list th,
.word-list td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.word-list th {
  background: var(--accent-color);
  color: white;
  font-weight: 600;
  position: sticky;
  top: 0;
  font-size: 14px;
}

.word-list tr:hover {
  background: rgba(66, 153, 225, 0.05);
}

.german-word {
  color: var(--german-text);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
}

.meaning-text {
  color: var(--meaning-text);
  font-weight: 500;
}

.speaker-btn {
  background: var(--accent-color);
  color: white;
  border: none;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s ease;
  min-width: 32px;
  min-height: 28px;
}

.speaker-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.1);
}

.speaker-btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 1px;
}

.word-list tr.gender-masculine {
  border-left: 4px solid var(--masculine-color);
}

.word-list tr.gender-feminine {
  border-left: 4px solid var(--feminine-color);
}

.word-list tr.gender-neuter {
  border-left: 4px solid var(--neuter-color);
}

.word-list tr.gender-plural {
  border-left: 4px solid var(--plural-color);
}

.matching-game {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 20px;
}

.matching-column {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 16px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.matching-column h3 {
  text-align: center;
  margin-bottom: 16px;
  color: var(--accent-color);
  font-size: 1.1rem;
}

.matching-item {
  padding: 14px 16px;
  margin-bottom: 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid var(--border-color);
  background: var(--card-bg);
  font-weight: 500;
  position: relative;
  min-height: 48px;
  display: flex;
  align-items: center;
}

.matching-item:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.matching-item.selected {
  border-color: var(--accent-color);
  background: rgba(66, 153, 225, 0.1);
}

.matching-item.matched {
  background: rgba(72, 187, 120, 0.1);
  border-color: var(--success-color);
  cursor: not-allowed;
  opacity: 0.7;
}

.matching-item.error {
  border-color: var(--error-color);
  background: rgba(245, 101, 101, 0.1);
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%,
  20%,
  40%,
  60%,
  80% {
    transform: translateX(0);
  }
  10%,
  30%,
  50%,
  70% {
    transform: translateX(-3px);
  }
}

.german-text {
  color: var(--german-text);
}

.matching-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

.connection-line {
  stroke: var(--success-color);
  stroke-width: 3;
  opacity: 0.8;
}

.congratulations {
  text-align: center;
  margin-top: 24px;
  padding: 20px;
  background: linear-gradient(135deg, var(--success-color), #38a169);
  color: white;
  border-radius: 12px;
  box-shadow: var(--shadow-medium);
}

.congratulations h2 {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.stats-panel {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--border-color);
}

.stats-row {
  margin-bottom: 12px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  text-align: center;
}

.stat-item {
  padding: 12px;
  border-radius: 8px;
  background: rgba(66, 153, 225, 0.05);
}

.stat-number {
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--accent-color);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.stats-row:last-child {
  margin-bottom: 0;
}

.stats-row:last-child .stat-item {
  background: rgba(72, 187, 120, 0.05);
}

.stats-row:last-child .stat-number {
  color: var(--success-color);
  font-size: 1.2rem;
}

.stats-row:last-child .stat-label {
  font-size: 0.75rem;
}

.streak-display {
  background: linear-gradient(135deg, var(--success-color), #38a169);
  color: white;
  padding: 12px 16px;
  border-radius: 8px;
  text-align: center;
  font-weight: bold;
  margin-bottom: 16px;
}

.streak-flame {
  font-size: 1.2rem;
  margin-right: 8px;
}

.rtl {
  direction: rtl;
  text-align: right;
}

.cloze-text-container {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  font-size: 1.2rem;
  line-height: 2;
  color: var(--text-secondary);
}

.cloze-gap {
  display: inline-block;
  width: 150px;
  height: 45px;
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  background-color: var(--card-bg);
  vertical-align: middle;
  margin: 0 4px;
  transition: border-color 0.3s ease;
  position: relative;
}

.cloze-gap.drag-over {
  border-color: var(--accent-color);
}

.cloze-gap.correct {
  border-style: solid;
  border-color: var(--success-color);
  background-color: rgba(72, 187, 120, 0.1);
}

.cloze-gap.incorrect {
  border-style: solid;
  border-color: var(--error-color);
  background-color: rgba(245, 101, 101, 0.1);
}

.cloze-gap .word-button {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 4px;
  font-size: 1rem;
}

#clozeWordBank .word-button {
  cursor: grab;
}

#clozeWordBank .word-button:active {
  cursor: grabbing;
}

#audioQuizSpeaker {
  transition: transform 0.2s ease;
}
#audioQuizSpeaker:hover {
  transform: scale(1.1);
}

.speed-challenge-status {
  color: var(--text-secondary);
  font-weight: 600;
}

#speedChallengeOptions .article-btn {
  width: 80%;
  max-width: 400px;
  text-align: center;
  justify-content: center;
}

@media (max-width: 768px) {
  .container {
    padding: 12px;
  }

  /* إخفاء رأس الجدول على الموبايل */
  .word-list thead {
    display: none;
  }

  .word-list table {
    display: block;
  }

  .word-list tbody {
    display: block;
  }

  /* تحويل كل صف إلى بطاقة */
  .word-list tr {
    display: block;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 12px;
    padding: 12px;
    box-shadow: var(--shadow-light);
  }

  .word-list tr:hover {
    background: var(--card-bg);
  }

  /* تحويل كل خلية إلى صف */
  .word-list td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 4px;
    border-bottom: 1px solid var(--border-color);
    text-align: right;
  }

  .word-list td:last-child {
    border-bottom: none;
  }

  /* إظهار التسمية قبل كل خلية */
  .word-list td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    text-align: left;
    flex-shrink: 0;
    margin-right: 10px;
  }

  /* تنسيق خلية التحديد */
  .word-list td[data-label="Select"] {
    justify-content: center;
    padding: 4px;
    border-bottom: none;
    position: absolute;
    top: 8px;
    right: 8px;
    width: auto;
  }

  .word-list td[data-label="Select"]::before {
    display: none;
  }

  /* الصف يحتاج position relative للـ checkbox */
  .word-list tr {
    position: relative;
    padding-top: 40px;
  }

  /* تنسيق خلية الكلمة الألمانية */
  .word-list td[data-label="German Word"] {
    background: rgba(66, 153, 225, 0.1);
    border-radius: 8px;
    margin-bottom: 8px;
  }

  .word-list td[data-label="German Word"] .german-word {
    flex-direction: row;
    gap: 8px;
  }

  /* تنسيق زر الصوت */
  .word-list .speaker-btn {
    padding: 8px 10px;
    min-width: 36px;
    min-height: 32px;
  }

  /* تنسيق خلية الأفعال (Actions) */
  .word-list td[data-label="Actions"] {
    justify-content: center;
    margin-top: 8px;
  }

  .word-list td[data-label="Actions"]::before {
    display: none;
  }

  .word-list td[data-label="Actions"] .btn {
    width: 100%;
    padding: 10px 16px;
    font-size: 14px;
  }

  .word-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
  }

  .header {
    padding: 16px;
    margin-bottom: 16px;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .btn,
  .search-input {
    width: 100%;
    justify-content: center;
    font-size: 14px;
  }

  .toggle-group {
    width: 100%;
  }

  .toggle-btn {
    flex: 1;
  }

  .gender-legend {
    margin-top: 12px;
    font-size: 11px;
  }

  .flashcards-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .flashcard {
    height: 160px;
  }

  .matching-game {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .matching-column {
    padding: 12px;
  }

  .matching-item {
    padding: 12px 14px;
    font-size: 14px;
    min-height: 44px;
  }

  .sentence-practice {
    padding: 16px;
  }

  .practice-controls {
    flex-direction: column;
  }

  .practice-controls .btn {
    width: 100%;
  }

  .scramble-container {
    gap: 16px;
  }

  .word-bank,
  .answer-area {
    min-height: 70px;
    padding: 12px;
  }

  .article-options {
    flex-direction: column;
    align-items: center;
  }

  .article-btn {
    width: 200px;
  }

  .input-group {
    flex-direction: column;
    align-items: center;
  }

  .quiz-input {
    width: 250px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 8px;
  }

  .header {
    padding: 12px;
  }

  .header h1 {
    font-size: 1.3rem;
    margin-bottom: 12px;
  }

  .flashcard {
    height: 140px;
  }

  .flashcard-front,
  .flashcard-back {
    font-size: 1rem;
    padding: 16px;
  }

  .gender-legend {
    gap: 8px;
  }

  .legend-item {
    font-size: 10px;
  }

  .practice-word {
    font-size: 1.1rem;
    padding: 12px 16px;
  }

  .word-button {
    padding: 6px 12px;
    font-size: 13px;
    margin: 2px;
  }

  .word-display {
    font-size: 1.5rem;
  }

  .article-btn {
    padding: 10px 16px;
    width: 180px;
  }

  .pagination-controls {
    flex-wrap: wrap;
  }
}

.footer {
  text-align: center;
  padding: 24px 16px;
  margin-top: 24px;
  border-top: 1px solid var(--border-color);
}

.footer p {
  color: var(--text-secondary);
  font-size: 14px;
  opacity: 0.8;
}
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.fade-in {
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (hover: none) and (pointer: coarse) {
  .btn:hover,
  .flashcard:hover .flashcard-inner,
  .matching-item:hover {
    transform: none;
  }

  .speaker-btn:hover {
    transform: none;
    background: var(--accent-color);
  }
}

.loading-spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  border-top-color: var(--accent-color);
  animation: spin 1s ease-in-out infinite;
}

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

.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

/* تنسيقات الترمومتر */
.progress-container {
  margin: 16px 0;
  padding: 12px;
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: var(--shadow-light);
  border: 1px solid var(--border-color);
}

.progress-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.progress-bar {
  height: 12px;
  background-color: var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success-color), #38a169);
  border-radius: 6px;
  transition: width 0.5s ease;
  width: 0%;
}

/* Lesson Selector Styles */
.lesson-selector {
  margin: 15px 0;
  text-align: center;
}

.level-selector {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 15px;
}

.level-btn {
  padding: 10px 20px;
  border: 2px solid var(--border-color);
  background-color: var(--card-bg);
  color: var(--text-primary);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}

.level-btn:hover {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.level-btn.active {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.lesson-buttons {
  display: flex;
  justify-content: center;
  gap: 3px;
  flex-wrap: wrap;
  padding: 5px 0;
  max-width: 100%;
}

.lesson-btn {
  padding: 6px 8px;
  min-width: 32px;
  height: 32px;
  border: 2px solid var(--border-color);
  background-color: var(--card-bg);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
  color: var(--text-primary) !important;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.lesson-btn:hover {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium) !important;
}

.lesson-btn.active {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
  box-shadow: var(--shadow-medium) !important;
}