:root {
  --bg: #f1f5f9;
  --panel: #ffffff;
  --panel2: #f8fafc;
  --panel3: #f1f5f9;
  --text: #0f172a;
  --muted: #64748b;
  --dim: #94a3b8;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --on-accent: #ffffff;
  --good: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
  --cyan: #0891b2;
  --border: #e2e8f0;
  --map-bg: #f8fafc;
  --map-grid: rgba(100, 116, 139, 0.12);
  --zone-bg: rgba(255, 255, 255, 0.88);
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
  --scrollbar: #cbd5e1;
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #0b1220;
  --panel: #111a2e;
  --panel2: #0f1728;
  --panel3: #16233c;
  --text: #e6edf7;
  --muted: #94a3b8;
  --dim: #64748b;
  --accent: #60a5fa;
  --accent-hover: #3b82f6;
  --on-accent: #0b1220;
  --good: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --cyan: #22d3ee;
  --border: #1e293b;
  --map-bg: #0b1220;
  --map-grid: rgba(148, 163, 184, 0.07);
  --zone-bg: rgba(17, 26, 46, 0.9);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  --scrollbar: #334155;
  color-scheme: dark;
}

* { box-sizing: border-box; }

::selection { background: var(--accent); color: #fff; }

html { background: var(--bg); }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.topbar,
.timeline-panel,
.panel,
.counter,
.tab,
.airport-plan,
.air-map {
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  padding: 16px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}
.topbar h1 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  color: var(--text);
  letter-spacing: 0px;
  justify-self: start;
}

.topbar-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
  justify-self: end;
  min-width: 0;
}

.sim-time {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: 1px;
  background: rgba(37, 99, 235, 0.08);
  padding: 2px 12px;
  border-radius: 8px;
}
.legend { font-size: 12px; color: var(--muted); letter-spacing: 0px; text-align: right; white-space: nowrap; }

button#btn-load {
  display: inline-flex;
  align-items: center;
  justify-self: center;
  gap: 9px;
  height: 42px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--on-accent);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.14);
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
button#btn-load .btn-icon { font-size: 17px; line-height: 1; }
button#btn-load:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.25);
}

#btn-theme {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  cursor: pointer;
  font-size: 17px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: border-color 0.15s ease, background-color 0.2s ease;
}
#btn-theme:hover { border-color: var(--accent); color: var(--accent); }

/* Timeline fixed at top */
.timeline-panel {
  padding: 12px 24px 8px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
}
.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.transport { display: inline-flex; align-items: center; gap: 6px; }
.controls button {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0;
  height: 38px;
  width: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  letter-spacing: 0px;
  text-transform: none;
  font-size: 13px;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.controls button:hover { background: var(--panel2); border-color: var(--accent); color: var(--accent); }
#btn-play {
  width: 44px;
  height: 42px;
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  border-radius: 10px;
}
#btn-play:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--on-accent); }
#btn-play #ic-play { display: block; }
#btn-play #ic-pause { display: none; }
#btn-play.is-playing #ic-play { display: none; }
#btn-play.is-playing #ic-pause { display: block; }
.controls select {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  height: 38px;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
}
.controls select option { background: var(--panel); color: var(--text); }
.progress { color: var(--muted); font-size: 12px; margin-left: auto; font-variant-numeric: tabular-nums; }
#slider { width: 100%; accent-color: var(--accent); }
.axis {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 11px;
  padding: 2px 2px 6px;
  letter-spacing: 0px;
}

/* Tabs */
.tabs { display: flex; gap: 4px; padding: 14px 24px 0; }
.tab {
  background: transparent;
  color: var(--muted);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 9px 16px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0px;
  text-transform: none;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.tab:hover { color: var(--accent); }
.tab.active {
  background: transparent;
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}
.tab.active::before { content: ""; }

main { padding: 16px 24px 28px; }

.counters {
  display: flex;
  gap: 16px;
  padding: 8px 0 18px;
  flex-wrap: wrap;
}
.counter {
  flex: 1 1 140px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  text-align: center;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
}
.counter .num {
  font-size: 30px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.counter .lbl { color: var(--muted); font-size: 11px; letter-spacing: 0.4px; text-transform: uppercase; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}
.panel h2 {
  margin-top: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.8px;
  text-transform: uppercase;
}
.panel h2::before { content: ""; }

.metrics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.chart-wrap { height: 260px; position: relative; }
.chart-full { margin-top: 16px; }
.queue-wrap { height: 240px; }

/* Airport selector */
.airport-top { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.airport-top label { font-size: 11px; font-weight: 600; color: var(--muted); letter-spacing: 0.6px; text-transform: uppercase; }
#airport-select {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}
#airport-select option { background: var(--panel); color: var(--text); }
.airport-title { font-weight: 700; font-size: 14px; color: var(--text); letter-spacing: 0px; }
.airport-side { margin-left: auto; font-size: 11px; color: var(--muted); letter-spacing: 0.4px; }

/* Airport floor plan */
.airport-plan {
  position: relative;
  height: 480px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background-color: var(--map-bg);
  background-image:
    linear-gradient(var(--map-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--map-grid) 1px, transparent 1px);
  background-size: 20px 20px;
  overflow: hidden;
}
.zone-area {
  position: absolute;
  border-width: 1.5px;
  border-style: solid;
  border-radius: 10px;
  background: var(--zone-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.08);
}
.zone-name {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  align-self: flex-start;
  margin: 8px 0 0 10px;
  text-shadow: none;
  text-transform: uppercase;
  color: var(--muted);
}
.zone-count {
  position: absolute;
  bottom: 8px;
  right: 10px;
  min-width: 30px;
  height: 30px;
  padding: 0 8px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.2);
  font-variant-numeric: tabular-nums;
}
.zone-arrow {
  position: absolute;
  transform: translate(-50%, -50%);
  color: var(--muted);
  font-size: 14px;
  pointer-events: none;
}
.flow-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.flow-line {
  stroke: var(--dim);
  stroke-width: 0.6;
  stroke-dasharray: 2 2;
  opacity: 0.8;
}
.person-dot {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
  transition: left 0.9s linear, top 0.9s linear;
  box-shadow: 0 0 4px rgba(37, 99, 235, 0.4);
  pointer-events: none;
}
.airport-note { margin: 10px 2px 0; font-size: 11px; color: var(--muted); }
.airport-gates { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.gate-chip {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 12px;
  min-width: 96px;
  text-align: center;
  letter-spacing: 0.3px;
}
.gate-chip b { display: block; font-size: 18px; color: var(--accent); font-variant-numeric: tabular-nums; }
.zone-tag { color: var(--muted); letter-spacing: 0.3px; }

/* Air map */
.air-map {
  position: relative;
  height: 400px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background-color: var(--map-bg);
  background-image:
    linear-gradient(var(--map-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--map-grid) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px;
  overflow: hidden;
}
.airport-node { position: absolute; transform: translate(-50%, -50%); text-align: center; cursor: default; }
.airport-node .dot {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--panel);
  border: 2px solid var(--dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 11px;
  margin: 0 auto 4px;
  color: var(--text);
  font-family: inherit;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.15);
}
.airport-node .name { font-size: 10px; font-weight: 600; color: var(--muted); letter-spacing: 0.5px; }
.airport-node.hub .dot { border-color: var(--good); color: var(--good); box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.15); }

.air-line { position: absolute; height: 2px; background: var(--accent); transform-origin: 0 50%; opacity: 0.8; }
.air-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.air-path {
  fill: none;
  stroke: var(--cyan);
  stroke-opacity: 0.7;
  stroke-width: 0.4;
  stroke-linecap: round;
}
.air-path.faint {
  stroke: var(--dim);
  stroke-opacity: 0.6;
  stroke-width: 0.24;
  stroke-dasharray: 1 1;
}
.air-plane {
  position: absolute;
  transform: translate(-50%, -50%);
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 7px;
  white-space: nowrap;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
  transition: left 0.7s linear, top 0.7s linear, transform 0.7s linear;
  font-family: inherit;
  letter-spacing: 0.3px;
  z-index: 2;
}
.air-list { margin-top: 14px; display: flex; flex-direction: column; gap: 6px; }
.air-row {
  display: flex;
  justify-content: space-between;
  background: var(--panel2);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 7px 10px;
  font-size: 12px;
}
.air-row b { color: var(--accent); font-weight: 600; }
.air-row span:last-child { color: var(--muted); }

/* scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 5px; border: 2px solid var(--bg); }

@media (max-width: 900px) {
  .metrics-grid { grid-template-columns: 1fr; }
}
/* ============================================================
   Operational report (tab) and bundle loading
   ============================================================ */
body.dropping::after {
  content: "Drop a bundle here";
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 2px dashed var(--accent);
  pointer-events: none;
}

@media (max-width: 900px) {
  .legend { display: none; }
}

@media (max-width: 560px) {
  .topbar { grid-template-columns: 1fr auto; row-gap: 12px; padding: 12px 16px; }
  #btn-load { order: 3; grid-column: 1 / -1; justify-self: center; }
  .topbar-right { grid-column: 2; grid-row: 1 / span 2; }
}

.report-body { display: flex; flex-direction: column; gap: 16px; }

.report-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.report-toolbar button {
  background: var(--accent);
  color: var(--on-accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 8px 14px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.report-toolbar button:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.report-toolbar button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--panel2);
  color: var(--muted);
  border-color: var(--border);
}
.report-badge {
  align-self: flex-start;
  background: color-mix(in srgb, #16a34a 12%, transparent);
  color: #16a34a;
  border: 1px solid color-mix(in srgb, #16a34a 40%, transparent);
  border-radius: 20px;
  font-size: 12px;
  padding: 4px 12px;
}
.report-badge.alt {
  background: color-mix(in srgb, #f59e0b 12%, transparent);
  color: #f59e0b;
  border-color: color-mix(in srgb, #f59e0b 40%, transparent);
}
.report-sub {
  color: var(--muted);
  font-size: 12px;
  margin: 0;
}
.report-counters { margin-bottom: 8px; }

.report-block h3 { font-size: 14px; margin: 0 0 10px; color: var(--title); }
.report-block h4 { font-size: 12px; margin: 14px 0 6px; color: var(--muted); font-weight: 600; }

.report-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.report-table th {
  text-align: left;
  color: var(--muted);
  font-weight: 600;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.report-table td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--border-light, var(--border));
  white-space: nowrap;
}
.report-table tbody tr:hover { background: var(--panel-hover, transparent); }
.report-table .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }
.report-table-wrap { overflow-x: auto; }

.pill {
  display: inline-block;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
}
.pill.ok { background: color-mix(in srgb, #16a34a 14%, transparent); color: #16a34a; }
.pill.bad { background: color-mix(in srgb, #ef4444 14%, transparent); color: #ef4444; }

.report-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}
.report-kpis > div {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.report-kpis b { font-size: 18px; color: var(--title); }
.report-kpis span { font-size: 11px; color: var(--muted); }

.hm-grid {
  display: grid;
  grid-template-columns: 64px repeat(auto-fit, minmax(40px, 1fr));
  gap: 2px;
  margin-bottom: 2px;
}
.hm-grid.hm-head { grid-template-columns: 64px repeat(auto-fit, minmax(40px, 1fr)); }
.hm-apt { font-size: 11px; color: var(--muted); font-weight: 600; padding-top: 6px; }
.hm-head {
  font-size: 10px;
  color: var(--muted);
  text-align: center;
  padding-top: 2px;
}
.hm-cell {
  border-radius: 4px;
  background: color-mix(in srgb, #2563eb calc(var(--hm, 0) * 100%), transparent);
  color: #fff;
  font-size: 10px;
  text-align: center;
  padding: 5px 0;
  min-width: 34px;
}