/* ============================================================
   Analytics Dashboard — Page-specific styles
   Extends design tokens from style.css
   ============================================================ */

/* --- HERO STATS OVERRIDE (4 columns instead of 3) --- */
.hero-stats {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 600px) {
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- EMPTY STATE --- */
.chart-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-style: italic;
}

/* --- PERIOD SELECTOR --- */
.period-selector {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  padding: var(--space-3) var(--space-4);
}

.period-btn {
  background: var(--color-card);
  color: var(--color-text-dim);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.period-btn:hover {
  background: var(--color-card-hover);
  color: var(--color-text);
}

.period-btn.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.mode-divider {
  width: 1px;
  height: 24px;
  background: var(--color-border);
  margin: 0 var(--space-2);
}

.mode-btn {
  background: var(--color-card);
  color: var(--color-text-dim);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.mode-btn:hover {
  background: var(--color-card-hover);
  color: var(--color-text);
}

.mode-btn.live {
  background: rgba(76, 175, 80, 0.15);
  color: #4caf50;
  border-color: #4caf50;
}

.mode-btn.snapshot {
  background: var(--color-card);
  color: var(--color-text-dim);
}

/* --- ANALYTICS GRID --- */
.analytics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  padding: var(--space-4);
  max-width: 1400px;
  margin: 0 auto;
  padding-bottom: 100px; /* mobile nav clearance */
}

.analytics-card {
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.card-wide {
  grid-column: span 1;
}

.card-full {
  grid-column: 1 / -1;
}

.card-title {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  margin: 0 0 var(--space-3) 0;
}

.chart-subtitle {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-dim);
  margin: 0 0 var(--space-2) 0;
}

/* --- CHART CONTAINERS --- */
.chart-container {
  position: relative;
  height: 250px;
  width: 100%;
}

.chart-container.chart-tall {
  height: 350px;
}

/* --- WORST DELAYS TABLE --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.data-table th {
  text-align: left;
  color: var(--color-text-dim);
  font-weight: var(--font-medium);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.data-table td {
  padding: var(--space-2) var(--space-3);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-card-border);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.line-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-right: var(--space-1);
  vertical-align: middle;
}

.status-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-delayed {
  background: rgba(230, 168, 23, 0.15);
  color: #e6a817;
}

.badge-cancelled {
  background: rgba(211, 47, 47, 0.15);
  color: #d32f2f;
}

/* --- DEEP DIVE --- */
.deep-dive-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.deep-dive-header .card-title {
  margin: 0;
}

.deep-dive-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.deep-dive-chart {
  min-width: 0;  /* prevent chart overflow */
}

/* --- ANALYTICS SELECT --- */
.analytics-select {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  cursor: pointer;
}

.analytics-select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- TRAIN LOOKUP --- */
.train-lookup-form {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: var(--space-4);
}

.train-result {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
}

.train-stats-row {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.train-stat {
  flex: 1;
  min-width: 100px;
  text-align: center;
  padding: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-card-border);
}

.train-stat-value {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
}

.train-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-dim);
  margin-top: var(--space-1);
}

/* --- HERO STAT COLORS --- */
.stat-good {
  color: var(--color-good);
}

.stat-warn {
  color: var(--color-delayed);
}

.stat-bad {
  color: var(--color-severe);
}

/* --- SYSTEM SECTION --- */
.system-details summary {
  cursor: pointer;
  user-select: none;
}

.system-details summary::-webkit-details-marker {
  color: var(--color-text-dim);
}

.clickable {
  cursor: pointer;
}

.system-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.system-chart {
  min-width: 0;
}

/* --- ALERT TIMELINE --- */
.alert-timeline {
  max-height: 400px;
  overflow-y: auto;
}

.alert-item {
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-card-border);
}

.alert-item:last-child {
  border-bottom: none;
}

.alert-item.alert-active {
  border-left: 3px solid var(--color-delayed);
  padding-left: calc(var(--space-3) - 3px);
}

.alert-meta {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  margin-bottom: var(--space-1);
}

.alert-time {
  font-size: var(--text-xs);
  color: var(--color-text-dim);
}

.alert-duration {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: var(--color-surface);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

.alert-badge {
  font-size: 10px;
  font-weight: var(--font-bold);
  color: #e6a817;
  background: rgba(230, 168, 23, 0.12);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.alert-lines {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
}

.alert-text {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.4;
}

.text-muted {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* --- DATA AGE (analytics page) --- */
.data-age.stale {
  color: var(--color-severe);
}

.data-age.aging {
  color: var(--color-delayed);
}

/* --- MOBILE BOTTOM NAV --- */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2) 0;
  z-index: 100;
}

.mobile-nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--color-text-dim);
  text-decoration: none;
  font-size: 10px;
  padding: var(--space-1) 0;
}

.mobile-nav-link.active {
  color: var(--color-accent);
}

@media (max-width: 600px) {
  .mobile-nav {
    display: flex;
    justify-content: space-around;
  }

  .nav-links {
    display: none;
  }
}

/* --- DATE RANGE PICKER --- */
.date-range-picker {
  max-width: 640px;
  margin: 0 auto;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.drp-panels {
  display: flex;
  gap: var(--space-4);
}

.drp-panel {
  flex: 1;
}

.drp-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.drp-nav {
  background: none;
  border: none;
  color: var(--color-text-dim);
  cursor: pointer;
  font-size: 18px;
  padding: var(--space-1);
  line-height: 1;
}

.drp-nav:hover {
  color: var(--color-text);
}

.drp-month-label {
  font-weight: var(--font-semibold);
  color: var(--color-text);
  font-size: var(--text-sm);
}

.drp-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.drp-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}

.drp-day {
  padding: 6px 2px;
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.drp-day:hover {
  background: var(--color-card-hover);
}

.drp-day.drp-start,
.drp-day.drp-end {
  background: var(--color-accent);
  color: #fff;
}

.drp-day.drp-in-range {
  background: rgba(230, 168, 23, 0.2);
}

.drp-day.drp-today {
  outline: 1px solid var(--color-accent);
}

.drp-day.drp-other-month {
  color: var(--color-text-muted);
  opacity: 0.4;
  pointer-events: none;
}

.drp-day.drp-disabled {
  opacity: 0.2;
  pointer-events: none;
}

.drp-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.drp-actions button {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font-size: var(--text-sm);
  cursor: pointer;
}

.drp-apply {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.drp-apply.drp-disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.drp-cancel {
  background: var(--color-card);
  color: var(--color-text-dim);
}

/* --- DEEP DIVE FULL WIDTH --- */
.deep-dive-full {
  grid-column: 1 / -1;
}

/* --- TYPICAL SCHEDULE TABLE --- */
.typical-schedule-table {
  max-height: 400px;
  overflow-y: auto;
}

.typical-schedule-table table {
  width: 100%;
}

.schedule-deviation {
  display: inline-block;
  min-width: 50px;
  text-align: center;
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
}

.dev-good { color: #4caf50; }
.dev-warn { color: #e6a817; }
.dev-bad { color: #d32f2f; }
.dev-none { color: var(--color-text-muted); font-style: italic; }

/* --- RESPONSIVE --- */
@media (max-width: 900px) {
  .analytics-grid {
    grid-template-columns: 1fr;
  }

  .card-wide {
    grid-column: span 1;
  }

  .deep-dive-grid {
    grid-template-columns: 1fr;
  }

  .system-grid {
    grid-template-columns: 1fr;
  }

  .drp-panels {
    flex-direction: column;
  }

  .train-lookup-form {
    flex-direction: column;
    align-items: stretch;
  }

  .train-stats-row {
    flex-wrap: wrap;
  }

  .train-stat {
    min-width: 80px;
  }
}

@media (max-width: 600px) {
  .analytics-grid {
    padding: var(--space-2);
    gap: var(--space-2);
  }

  .analytics-card {
    padding: var(--space-3);
  }

  .chart-container {
    height: 200px;
  }

  .chart-container.chart-tall {
    height: 280px;
  }

  .period-selector {
    padding: var(--space-2);
  }
}