/* ============================================================
   Progress Chart Component Styles
   Used in Question Detail page Progress tab
   ============================================================ */

/* Progress Tab Content */
.progress-tab-content {
  padding: 8px 0;
}

/* Loading State */
.progress-loading {
  text-align: center;
  padding: 48px 24px;
  color: var(--color-text-secondary);
}

.progress-loading p {
  font-size: 14px;
}

/* ============================================================
   Filters Row (Context Filters + Time Range)
   ============================================================ */
.progress-filters-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

/* ============================================================
   Time Range Selector
   ============================================================ */
.progress-time-range {
  display: flex;
  gap: 0;
  flex-shrink: 0;
}

.time-btn {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 0;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  min-width: 50px;
  text-align: center;
  margin-left: -1px;
}

.time-btn:first-child {
  border-radius: 6px 0 0 6px;
  margin-left: 0;
}

.time-btn:last-child {
  border-radius: 0 6px 6px 0;
}

.time-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  z-index: 1;
  position: relative;
}

.time-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  z-index: 2;
  position: relative;
}

/* ============================================================
   Custom Date Range
   ============================================================ */
.progress-custom-range {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--color-bg-muted);
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.progress-custom-range.hidden {
  display: none;
}

.progress-custom-range input[type="date"] {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  background: var(--color-bg);
  color: var(--color-text);
}

.progress-custom-range input[type="date"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

.progress-custom-range span {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.btn-sm {
  padding: 8px 16px !important;
  font-size: 14px !important;
}

/* ============================================================
   Context Filters
   ============================================================ */
.progress-filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.progress-filters select {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg);
  font-size: 14px;
  min-width: 140px;
  cursor: pointer;
  color: var(--color-text);
}

.progress-filters select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.clear-filters-btn {
  padding: 8px 12px;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 14px;
  transition: color 0.2s ease;
}

.clear-filters-btn:hover {
  color: var(--color-danger);
}

/* ============================================================
   KPI Summary Cards
   ============================================================ */
.progress-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.progress-kpi {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  background: var(--color-bg-muted);
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--color-border);
}

.progress-kpi .kpi-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.progress-kpi .kpi-label {
  font-size: 12px;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin-top: 4px;
  letter-spacing: 0.5px;
}

.progress-kpi.improvement .kpi-value {
  color: var(--color-success);
}

.progress-kpi.improvement .kpi-value.negative {
  color: var(--color-danger);
}

/* ============================================================
   Chart Container
   ============================================================ */
.progress-chart-container {
  height: 300px;
  position: relative;
  background: var(--color-bg);
  border-radius: 8px;
  padding: 16px;
  border: 1px solid var(--color-border);
}

/* ============================================================
   Empty States
   ============================================================ */
.progress-empty-state {
  text-align: center;
  padding: 48px 24px;
}

.progress-empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.progress-empty-state .empty-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.progress-empty-state .empty-description {
  font-size: 14px;
  color: var(--color-text-secondary);
  max-width: 400px;
  margin: 0 auto 20px;
  line-height: 1.6;
}

.progress-empty-state .btn-secondary {
  margin-top: 8px;
}

/* ============================================================
   Mobile Responsive
   ============================================================ */
@media (max-width: 768px) {
  .progress-filters-row {
    flex-direction: column;
    gap: 12px;
  }

  .progress-time-range {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }

  .time-btn {
    padding: 6px 12px;
    font-size: 13px;
    flex-shrink: 0;
  }

  .progress-filters {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .progress-filters select {
    width: 100%;
    min-width: auto;
  }

  .progress-filters .clear-filters-btn {
    align-self: flex-start;
  }

  .progress-summary {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .progress-kpi {
    padding: 12px;
  }

  .progress-kpi .kpi-value {
    font-size: 24px;
  }

  .progress-kpi .kpi-label {
    font-size: 11px;
  }

  .progress-chart-container {
    height: 250px;
    padding: 12px;
  }

  .progress-custom-range {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .progress-custom-range input[type="date"] {
    width: 100%;
  }

  .progress-custom-range span {
    text-align: center;
  }

  .progress-empty-state {
    padding: 32px 16px;
  }

  .progress-empty-state .empty-icon {
    font-size: 40px;
  }

  .progress-empty-state .empty-title {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .progress-tab-content {
    padding: 4px 0;
  }

  .time-btn {
    padding: 6px 10px;
    font-size: 12px;
    min-width: 40px;
  }

  .progress-kpi .kpi-value {
    font-size: 20px;
  }

  .progress-chart-container {
    height: 220px;
  }
}