/* Spaced Repetition System Styles */

.sr-container {
  margin-top: 1.5rem;
}

.sr-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.sr-stat-card {
  background-color: var(--card-bg);
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: transform 0.2s ease;
}

.sr-stat-card:hover {
  transform: translateY(-3px);
}

.sr-stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.3rem;
}

.sr-stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.sr-actions {
  display: flex;
  gap: 1rem;
  margin: 1.5rem 0;
  justify-content: center;
}

.sr-actions button {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.sr-actions button.disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.sr-progress-visualization {
  margin-top: 1.5rem;
}

.sr-progress-bar {
  height: 24px;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  width: 100%;
  background-color: var(--card-bg);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.sr-progress-segment {
  height: 100%;
  transition: width 0.3s ease;
}

.sr-legend {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.75rem;
}

.sr-legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.sr-legend-color {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}

.sr-legend-label {
  color: var(--text-secondary);
}

.sr-calendar {
  margin-top: 2rem;
}

.sr-calendar-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  text-align: center;
}

.sr-calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
}

.sr-calendar-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.sr-calendar-header-cell {
  text-align: center;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.sr-calendar-day {
  aspect-ratio: 1;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  position: relative;
  background-color: var(--card-bg);
  cursor: default;
}

.sr-calendar-day.has-reviews {
  background-color: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

.sr-calendar-day.today {
  border: 2px solid var(--primary);
  color: var(--primary);
  font-weight: 700;
}

.sr-calendar-day .count {
  position: absolute;
  top: 2px;
  right: 2px;
  font-size: 0.7rem;
  background-color: var(--primary);
  color: white;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sr-no-words {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
}

.sr-import-section {
  margin-top: 2rem;
  text-align: center;
}

.sr-info {
  background-color: var(--info-light);
  border-left: 4px solid var(--info);
  padding: 1rem;
  border-radius: 4px;
  margin: 1.5rem 0;
}

.sr-info h4 {
  color: var(--info);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.sr-info p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.sr-difficulty {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.sr-difficulty-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.sr-difficulty-bar {
  flex: 1;
  height: 6px;
  background-color: #eee;
  border-radius: 3px;
  overflow: hidden;
}

.sr-difficulty-fill {
  height: 100%;
  background: linear-gradient(to right, #1dd1a1, #feca57, #ff6b6b);
}