/* layout.css — Header, tab bar, grid layout, responsive breakpoints */

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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
#app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-logo {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius-sm);
  padding: 3px 8px;
}

.header-title-group {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.header-station {
  font-family: var(--font-family-display);
  font-size: var(--font-size-lg);
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.header-station:hover {
  opacity: 0.85;
  text-decoration: underline;
}

.header-subtitle {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.02em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.demo-badge {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 20px;
  padding: 3px 10px;
  color: rgba(255, 255, 255, 0.9);
}

.demo-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  animation: pulse-demo 2s infinite;
}

@keyframes pulse-demo {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.alert-badge-wrap {
  position: relative;
}

.header-alert-badge {
  background: var(--color-red);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 700;
  border-radius: 20px;
  padding: 2px 7px;
  min-width: 20px;
  text-align: center;
}

.header-clock {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-base);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.9);
  min-width: 72px;
}

/* ── Tab Bar ── */
#tab-bar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  height: var(--tab-bar-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: stretch;
  padding: 0 var(--space-lg);
  gap: var(--space-xs);
  z-index: 90;
  box-shadow: var(--shadow-sm);
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0 var(--space-md);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--color-primary);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ── Route Strip ── */
#route-strip {
  position: fixed;
  top: calc(var(--header-height) + var(--tab-bar-height));
  left: 0;
  right: 0;
  height: var(--route-strip-height);
  background: #064e3b;
  z-index: 85;
  overflow: hidden;
}

.route-strip-svg {
  width: 100%;
  height: 100%;
}

.route-station {
  cursor: pointer;
  transition: opacity 150ms ease;
}

.route-station:hover circle {
  opacity: 0.85;
}

.route-station-tooltip {
  position: fixed;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  padding: 4px 8px;
  border-radius: var(--border-radius-sm);
  pointer-events: none;
  z-index: 300;
  white-space: nowrap;
}

/* ── Main Content ── */
#app-content {
  margin-top: calc(var(--header-height) + var(--tab-bar-height) + var(--route-strip-height));
  padding: var(--space-lg);
  padding-bottom: calc(var(--space-lg) + 40px);
  height: calc(100vh - var(--header-height) - var(--tab-bar-height) - var(--route-strip-height));
  overflow: hidden;
}

/* Real-time tab: constrain to viewport height, no scroll */
#tab-realtime .panel-grid {
  height: calc(100vh - var(--header-height) - var(--tab-bar-height) - var(--route-strip-height) - var(--space-lg) * 2 - 40px);
}

#tab-realtime .panel-main {
  overflow: hidden;
  height: 100%;
}

#tab-realtime .panel-sidebar {
  overflow-y: auto;
  max-height: calc(100vh - var(--header-height) - var(--tab-bar-height) - var(--route-strip-height) - var(--space-lg) * 2 - 40px);
}

#tab-realtime .panel-main .panel-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
}

#tab-realtime .panel-main .panel-card #realtime-floor-plan {
  flex: 1;
  min-height: 0;
  position: relative;
}

/* Analytics tab: fill viewport height */
#tab-analytics .panel-grid {
  height: 100%;
}

#tab-analytics .panel-main {
  overflow: hidden;
}

#tab-analytics .panel-sidebar {
  overflow-y: auto;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  height: 100%;
  overflow: hidden;
}

/* ── Panel Grid ── */
.panel-grid {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--space-lg);
  align-items: stretch;
}

.panel-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-width: 0;
}

.panel-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-width: 0;
}

/* ── Cards ── */
.panel-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.card-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
}

/* ── Speed Controls ── */
.speed-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

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

.speed-btn {
  padding: 3px 10px;
  border: 1px solid var(--color-border-strong);
  border-radius: 20px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast), transform 100ms ease;
}

.speed-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.speed-btn:active {
  transform: scale(0.92);
}

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

/* ── Occupancy Summary ── */
.total-occupancy-card {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  border-radius: var(--border-radius);
  padding: var(--space-md);
  color: #fff;
  text-align: center;
  margin-bottom: var(--space-md);
}

.occ-label {
  font-size: var(--font-size-sm);
  opacity: 0.75;
  margin-bottom: 4px;
}

.occ-value {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.occ-sub {
  font-size: var(--font-size-xs);
  opacity: 0.6;
  margin-top: 4px;
}

.last-update {
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
}

/* ── Zone Bars ── */
.zone-bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.zone-bar-row {
  display: grid;
  grid-template-columns: 90px 1fr 36px;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
}

.zone-bar-name {
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: var(--font-size-xs);
}

.zone-bar-track {
  height: 8px;
  background: var(--color-bg);
  border-radius: 4px;
  overflow: hidden;
}

.zone-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width var(--transition-base), background-color var(--transition-base);
}

.zone-bar-pct {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--color-text-muted);
}

/* ── Alert Panel ── */
.alert-history-header {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: var(--space-md) 0 var(--space-sm);
}

.alert-history-list {
  max-height: 160px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.alert-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-sm);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
}

.alert-card.green { background: var(--color-green-bg); color: var(--color-green); }
.alert-card.yellow { background: var(--color-yellow-bg); color: var(--color-yellow); }
.alert-card.red { background: var(--color-red-bg); color: var(--color-red); }

.alert-card-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.alert-card.green .alert-card-dot { background: var(--color-green); }
.alert-card.yellow .alert-card-dot { background: var(--color-yellow); }
.alert-card.red .alert-card-dot { background: var(--color-red); }

.alert-card-name { font-weight: 500; flex: 1; }
.alert-card-pct { font-weight: 600; font-variant-numeric: tabular-nums; }
.alert-card-time { font-size: var(--font-size-xs); color: var(--color-text-faint); margin-left: auto; }

.alert-history-item {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  padding: 3px var(--space-sm);
  border-radius: var(--border-radius-sm);
  display: flex;
  gap: var(--space-sm);
}

.alert-history-item .hist-time { color: var(--color-text-faint); flex-shrink: 0; }
.alert-history-item .hist-red { color: var(--color-red); }
.alert-history-item .hist-yellow { color: var(--color-yellow); }

.sound-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 3px 6px;
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  transition: all var(--transition-fast);
}

.sound-toggle:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ── Alert Panel Compact State ── */
#alert-panel .no-alert-msg {
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
  padding: var(--space-xs) 0;
}

#alert-panel .alert-history-header {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  user-select: none;
}

#alert-panel .alert-history-header::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--color-text-muted);
  transition: transform var(--transition-fast);
}

#alert-panel .alert-history-header.collapsed::after {
  transform: rotate(-90deg);
}

#alert-panel .alert-history-list.collapsed {
  display: none;
}

/* ── Footer ── */
#app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  z-index: 80;
}

.footer-sep { color: var(--color-border-strong); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-box {
  background: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  width: 480px;
  max-width: 90vw;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
}

.modal-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.modal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.modal-table td {
  padding: 6px var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.modal-table td:first-child {
  font-weight: 500;
  color: var(--color-text-muted);
  width: 40%;
}

/* ── Analytics Controls ── */
.analytics-controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.date-range {
  display: flex;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.date-range input {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 3px 6px;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.compare-btn {
  padding: 4px 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: 20px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.compare-btn:hover,
.compare-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ── Analytics Summary ── */
#analytics-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.summary-stat {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: var(--space-sm) var(--space-md);
  border-left: 3px solid var(--color-primary);
}

.summary-stat:nth-child(2) {
  border-left-color: var(--color-red);
}

.summary-stat:nth-child(3) {
  border-left-color: var(--color-accent);
}

.summary-stat:nth-child(4) {
  border-left-color: var(--color-yellow);
}

.summary-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.summary-stat-value {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.summary-stat-sub {
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
}

/* ── Top Zones Chart ── */
.top-zones-chart {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.top-zone-row {
  display: grid;
  grid-template-columns: 100px 1fr 36px;
  align-items: center;
  gap: var(--space-sm);
}

/* ── Journey Table ── */
.journey-table-wrap {
  margin-top: var(--space-md);
  overflow-x: auto;
}

.journey-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.journey-table th {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 2px solid var(--color-border);
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  user-select: none;
}

.journey-table th:hover { color: var(--color-primary); }

.journey-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.journey-table tr.has-bottleneck {
  background: var(--color-red-bg);
}

.journey-table tr.has-bottleneck td:first-child {
  border-left: 3px solid var(--color-red);
}

/* ── Journey Toggles ── */
.journey-toggles {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.journey-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border: 1px solid;
  border-radius: 20px;
  font-size: var(--font-size-xs);
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-family);
  transition: all var(--transition-fast);
  background: var(--color-surface);
}

.journey-toggle.inactive {
  opacity: 0.45;
}

/* ── Analytics Sub-Tabs ── */
.analytics-subtabs {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
  flex-shrink: 0;
}

.analytics-subtab {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text-muted);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.analytics-subtab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.analytics-subtab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.analytics-subpanel {
  display: none;
}

.analytics-subpanel.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.analytics-subpanel.active .panel-card {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 280px;
  }
}

@media (max-width: 768px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .header-subtitle { display: none; }

  #app-content {
    padding: var(--space-md);
  }

  .analytics-controls {
    flex-direction: column;
    align-items: flex-start;
  }

  #analytics-summary {
    grid-template-columns: 1fr;
  }
}