/* ── Dark mode (default) ── */
:root {
  --bg: #0a0f1c;
  --text: #f4f7ff;
  --text-muted: rgba(210,222,255,0.7);
  --text-subtle: rgba(180,200,240,0.45);
  --accent: #f6821f;
  --accent-b: #fbad41;
  --accent-glow: rgba(246,130,31,0.35);
  --blue: #60a5fa;
  --danger: #ff6b6b;
  --glass-bg: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.18);
  --map-ocean: #080d18;
  --map-land: #17213a;
  --map-land-stroke: #0e1628;
  --map-land-hover: #243050;
  --map-grid: transparent;
  --toolbar-bg: rgba(255,255,255,0.05);
  --ctrl-bg: rgba(255,255,255,0.06);
  --ctrl-bg-hover: rgba(255,255,255,0.12);
  --ctrl-border-hover: rgba(255,255,255,0.3);
  --badge-bg: rgba(255,255,255,0.06);
  --stats-bg: rgba(255,255,255,0.04);
  --loading-bg: rgba(8,13,24,0.7);
  --spinner-track: rgba(255,255,255,0.1);
  --tip-bg: rgba(20,28,50,0.92);
  --tip-shadow: rgba(0,0,0,0.4);
}

/* ── Light mode ── */
[data-theme="light"] {
  --bg: #f0f2f5;
  --text: #1a1e2e;
  --text-muted: rgba(40,50,80,0.65);
  --text-subtle: rgba(60,70,100,0.4);
  --accent: #e5700e;
  --accent-b: #f6921f;
  --accent-glow: rgba(229,112,14,0.25);
  --blue: #3b82f6;
  --danger: #dc2626;
  --glass-bg: rgba(0,0,0,0.04);
  --glass-border: rgba(0,0,0,0.12);
  --map-ocean: #dfe4ed;
  --map-land: #f9fafb;
  --map-land-stroke: #c8cdd8;
  --map-land-hover: #e2e6ee;
  --map-grid: #94a3b8;
  --toolbar-bg: rgba(255,255,255,0.85);
  --ctrl-bg: rgba(0,0,0,0.04);
  --ctrl-bg-hover: rgba(0,0,0,0.08);
  --ctrl-border-hover: rgba(0,0,0,0.2);
  --badge-bg: rgba(0,0,0,0.05);
  --stats-bg: rgba(255,255,255,0.9);
  --loading-bg: rgba(240,242,245,0.75);
  --spinner-track: rgba(0,0,0,0.1);
  --tip-bg: rgba(255,255,255,0.95);
  --tip-shadow: rgba(0,0,0,0.12);
}

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  transition: background 0.3s, color 0.3s;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ── Toolbar ── */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  height: 48px;
  flex-shrink: 0;
  background: var(--toolbar-bg);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.3s, border-color 0.3s;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.logo-icon {
  width: 30px; height: 30px;
  background: linear-gradient(135deg, var(--accent), var(--accent-b));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 14px var(--accent-glow);
}
.logo-icon svg { color: #fff; }

.title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.badge {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--badge-bg);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 0.15rem 0.6rem;
}

.ctrl-btn {
  background: var(--ctrl-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 5px 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  font-size: 0.85rem;
}
.ctrl-btn:hover {
  color: var(--text);
  background: var(--ctrl-bg-hover);
  border-color: var(--ctrl-border-hover);
}

.legend {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
}
.dot.dest   { background: var(--blue);   box-shadow: 0 0 5px var(--blue); }

/* ── Map canvas ── */
.map-wrap {
  flex: 1;
  min-height: 0;
  position: relative;
  background: var(--map-ocean);
  overflow: hidden;
  transition: background 0.3s;
}

#world-map {
  width: 100%;
  height: 100%;
  display: block;
}

.country {
  fill: var(--map-land);
  stroke: var(--map-land-stroke);
  stroke-width: 0.8px;
  transition: fill 0.3s, stroke 0.3s;
}
.country:hover { fill: var(--map-land-hover); }

.arc-path {
  fill: none;
  stroke-width: 1.2px;
  stroke-linecap: round;
  opacity: 0.55;
  transition: opacity 0.15s, stroke-width 0.15s;
}
.arc-path:hover { opacity: 1; stroke-width: 2px; }

/* ── Data-transfer flow animation ──────────────────────────────
   Dotted stream drawn on top of every arc, flowing origin → destination.
   `stroke-dashoffset` animates from 0 → -27 each cycle, which is exactly
   one full dash+gap, giving a seamless loop regardless of the arc length.
   Stroke colour + animation-duration are set inline by script.js. */
.arc-flow {
  fill: none;
  stroke-linecap: round;
  stroke-dasharray: 3 24;
  stroke-dashoffset: 0;
  opacity: 0.95;
  pointer-events: none;
  filter: drop-shadow(0 0 4px currentColor);
  animation-name: arc-flow-move;
  animation-duration: 4s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  will-change: stroke-dashoffset;
}
@keyframes arc-flow-move {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: -27; }
}
@media (prefers-reduced-motion: reduce) {
  .arc-flow { animation: none; opacity: 0.4; }
}

/* Origin pins — fill colour is set inline per origin country. */
.origin-pin {
  transition: filter 0.15s, transform 0.15s;
  /* Every origin glows; the colour comes from a CSS var set inline (--pin-color)
     so the halo matches the pin fill. The largest origin pulses faster/brighter. */
  filter: drop-shadow(0 0 6px var(--pin-color, rgba(255,255,255,0.6)))
          drop-shadow(0 2px 3px rgba(0,0,0,0.5));
  animation: pin-pulse 2.8s ease-in-out infinite;
}
.origin-pin:hover {
  filter: drop-shadow(0 0 14px var(--pin-color, rgba(255,255,255,0.9)))
          drop-shadow(0 0 4px rgba(255,255,255,0.6));
}
.origin-pin .origin-pin-body {
  stroke: rgba(0,0,0,0.55);
  stroke-width: 1.2px;
  paint-order: stroke;
}
.origin-pin .origin-pin-dot {
  fill: #fff;
  fill-opacity: 0.95;
  pointer-events: none;
}
.origin-pin.primary {
  /* Top-volume origin pulses faster + harder for emphasis. */
  animation: pin-pulse-strong 2.2s ease-in-out infinite;
}
@keyframes pin-pulse {
  0%, 100% {
    filter: drop-shadow(0 0 4px var(--pin-color, rgba(255,255,255,0.45)))
            drop-shadow(0 2px 3px rgba(0,0,0,0.5));
  }
  50% {
    filter: drop-shadow(0 0 12px var(--pin-color, rgba(255,255,255,0.85)))
            drop-shadow(0 2px 3px rgba(0,0,0,0.5));
  }
}
@keyframes pin-pulse-strong {
  0%, 100% {
    filter: drop-shadow(0 0 6px var(--pin-color, rgba(255,255,255,0.6)))
            drop-shadow(0 2px 3px rgba(0,0,0,0.5));
  }
  50% {
    filter: drop-shadow(0 0 18px var(--pin-color, rgba(255,255,255,1)))
            drop-shadow(0 2px 3px rgba(0,0,0,0.5));
  }
}
html[data-theme="light"] .origin-pin .origin-pin-body {
  stroke: rgba(0,0,0,0.4);
}

.dest-bubble {
  fill: var(--blue);
  fill-opacity: 0.75;
  stroke: rgba(96,165,250,0.2);
  stroke-width: 1px;
  cursor: pointer;
  filter: drop-shadow(0 0 4px rgba(96,165,250,0.5));
  transition: fill-opacity 0.15s;
}
.dest-bubble:hover { fill-opacity: 1; filter: drop-shadow(0 0 8px rgba(96,165,250,0.9)); }

/* ── Loading / Error ── */
.loading {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.82rem;
  z-index: 10;
  background: var(--loading-bg);
}

.spinner {
  width: 28px; height: 28px;
  border: 3px solid var(--spinner-track);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  text-align: center;
  z-index: 10;
  color: var(--danger);
  display: flex; flex-direction: column;
  align-items: center; gap: 0.5rem;
}
.error p { color: var(--text-muted); font-size: 0.8rem; }

/* Zoom */
.zoom-btns {
  position: absolute;
  right: 0.6rem; bottom: 0.6rem;
  display: flex; flex-direction: column;
  gap: 3px;
}

/* ── Stats ── */
.stats {
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 0.5rem 1rem;
  background: var(--stats-bg);
  border-top: 1px solid var(--glass-border);
  transition: background 0.3s;
  flex-shrink: 0;
}

.stat {
  display: flex; flex-direction: column;
  align-items: center; gap: 1px;
}

.stat-label {
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.stat-value {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ── Tooltip ── */
.tooltip {
  position: fixed;
  padding: 0.5rem 0.8rem;
  background: var(--tip-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 9px;
  font-size: 0.75rem;
  color: var(--text);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s;
  z-index: 100;
  max-width: 220px;
  line-height: 1.5;
  box-shadow: 0 6px 20px var(--tip-shadow);
}
.tooltip.visible { opacity: 1; }
.tooltip strong { color: var(--accent); }


/* ── App overrides (added) ── */
[hidden] { display: none !important; }
.zoom-btns .ctrl-btn { width: 30px; height: 30px; padding: 0; font-size: 1rem; }
.tooltip { white-space: nowrap; }
.tooltip br + * { white-space: normal; }


/* ── Route legend panel ── */
.route-legend {
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 10;
  padding: 10px 12px;
  background: var(--bg-elev, rgba(20,24,32,0.88));
  color: var(--fg, #e6e8eb);
  border: 1px solid var(--border, rgba(255,255,255,0.08));
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  backdrop-filter: blur(6px);
  max-width: 240px;
  font-size: 12px;
  line-height: 1.35;
  pointer-events: auto;
}
.route-legend-title {
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0.75;
}
.route-legend-list {
  display: grid;
  gap: 4px;
  max-height: 220px;
  overflow-y: auto;
}
.route-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.route-legend-swatch {
  width: 12px;
  height: 3px;
  border-radius: 2px;
  flex-shrink: 0;
}
.route-legend-pair { flex: 1; }
.route-legend-count { opacity: 0.65; font-variant-numeric: tabular-nums; }
html[data-theme="light"] .route-legend {
  background: rgba(255,255,255,0.92);
  color: #1a2233;
  border-color: rgba(0,0,0,0.08);
}

.legend-pin { color: var(--accent); display: inline-block; vertical-align: middle; margin-right: 2px; }