html, body { height: 100%; margin: 0; }
    #map { height: 100%; }
    .hud {
      position: absolute;
      top: 10px; left: 10px;
      background: rgba(0,0,0,.65);
      color: #fff;
      padding: 10px 12px;
      border-radius: 10px;
      font-family: ui-sans-serif, system-ui, sans-serif;
      z-index: 999;
      width: min(340px, calc(100vw - 20px));
      max-width: 340px;
      max-height: 90vh;
      overflow-y: auto;
      overflow-x: hidden;
      box-sizing: border-box;
    }
    .hud-header { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
    .hud-brand { display: flex; align-items: center; gap: 8px; }
    .hud-toggle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0;
      border: none;
      background: transparent;
      cursor: pointer;
    }
    .hud-logo { width: 28px; height: 28px; border-radius: 6px; object-fit: contain; background: rgba(255,255,255,.08); padding: 2px; }
    .hud.panel-hidden {
      background: transparent;
      border: none;
      padding: 0;
      width: auto;
      max-width: none;
    }
    .hud.panel-hidden .hud-body { display: none; }
    .hud.panel-hidden .hud-action { display: none; }
    .hud.panel-hidden .hud-title { display: none; }
    .hud-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 30px;
      height: 30px;
      border-radius: 8px;
      background: rgba(255,255,255,.12);
      border: 1px solid rgba(255,255,255,.2);
      color: #fff;
      text-decoration: none;
      cursor: pointer;
      transition: background .2s ease, border-color .2s ease;
    }
    .hud-action:hover {
      background: rgba(255,255,255,.22);
      border-color: rgba(255,255,255,.4);
    }
    .hud-action svg { width: 16px; height: 16px; fill: currentColor; }
    .hud-action.copied {
      background: rgba(34,197,94,.35);
      border-color: rgba(34,197,94,.6);
    }
    .small { opacity: .85; font-size: 12px; }
    .pill { display:inline-block; padding:2px 8px; border-radius:999px; background: rgba(255,255,255,.12); margin-right:6px; }
    .legend { margin-top: 8px; display: grid; gap: 6px; }
    .legend-item { display: flex; align-items: center; gap: 8px; font-size: 12px; opacity: 0.9; }
    .legend-line { width: 30px; height: 0; border-top: 4px solid; display: inline-block; }
    .legend-trace { border-color: #ff7a1a; border-top-style: dashed; }
    .legend-message { border-color: #2b8cff; border-top-style: dashed; }
    .legend-advert { border-color: #2ecc71; border-top-style: dotted; }
    .legend-history { border-color: #7dd3fc; border-top-style: solid; }
    .legend-history-swatch {
      width: 36px;
      height: 8px;
      border-radius: 6px;
      background: linear-gradient(90deg, #7dd3fc, #f59e0b, #ef4444);
      border: 1px solid rgba(255,255,255,.25);
      display: inline-block;
    }
    .legend-los-clear { border-color: #22c55e; border-top-style: solid; }
    .legend-los-blocked { border-color: #ef4444; border-top-style: dashed; }
    .legend-history-group { display: none; }
    .legend-history-group.active { display: block; }
    .legend-los-group { display: none; }
    .legend-los-group.active { display: block; }
    .legend-dot { width: 12px; height: 12px; border-radius: 50%; border: 2px solid; display: inline-block; }
    .legend-repeater { border-color: #1d4ed8; background: #2b8cff; }
    .legend-companion { border-color: #6b21a8; background: #a855f7; }
    .legend-room { border-color: #b45309; background: #f59e0b; }
    .legend-unknown { border-color: #4b5563; background: #d1d5db; }
    .legend-online { border-color: #22c55e; background: rgba(34, 197, 94, 0.15); }
    .legend-los-peak { border-color: #f59e0b; background: #fbbf24; }
    .legend-los-relay { border-color: #f8fafc; background: linear-gradient(135deg, #22c55e 0%, #f59e0b 100%); }
    .legend-heat { width: 30px; height: 10px; border-radius: 6px; background: linear-gradient(90deg, #fbbf24, #f97316, #ef4444, #b91c1c); border: 1px solid rgba(255,255,255,.25); display: inline-block; }
    .legend-toggle {
      margin-top: 6px;
      font-size: 12px;
      background: rgba(255,255,255,.12);
      color: #fff;
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 8px;
      padding: 4px 8px;
      cursor: pointer;
    }
    .legend-collapsed .legend { display: none; }
    .map-toggle {
      margin-top: 6px;
      font-size: 12px;
      background: rgba(255,255,255,.12);
      color: #fff;
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 8px;
      padding: 4px 8px;
      cursor: pointer;
    }
    .map-toggle.active {
      background: rgba(34,197,94,.35);
      border-color: rgba(34,197,94,.6);
    }
    .node-search {
      margin-top: 6px;
      position: relative;
      width: 100%;
    }
    .node-search-input {
      width: 100%;
      font-size: 12px;
      padding: 6px 8px;
      border-radius: 8px;
      border: 1px solid rgba(255,255,255,.2);
      background: rgba(15,23,42,.6);
      color: #fff;
      outline: none;
      box-sizing: border-box;
    }
    .node-search-input::placeholder { color: rgba(255,255,255,.65); }
    .node-search-results {
      position: absolute;
      left: 0;
      right: 0;
      top: calc(100% + 4px);
      background: rgba(15,23,42,.92);
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 8px;
      overflow: hidden;
      z-index: 1000;
      max-height: 200px;
      overflow-y: auto;
    }
    .node-search-item {
      padding: 6px 8px;
      font-size: 12px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      gap: 8px;
    }
    .node-search-item:hover { background: rgba(255,255,255,.12); }
    .node-search-id { opacity: 0.7; }
    .node-size-control {
      margin-top: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
    }
    .node-size-label { opacity: 0.85; }
    .node-size-range { flex: 1; accent-color: #22c55e; }
    .node-size-value { min-width: 30px; text-align: right; opacity: 0.75; }
    .node-label {
      background: rgba(15,23,42,.8);
      color: #fff;
      border: 1px solid rgba(255,255,255,.25);
      border-radius: 8px;
      padding: 2px 6px;
      font-size: 11px;
      white-space: nowrap;
    }
    .prop-panel {
      position: absolute;
      top: 18px;
      right: 18px;
      width: 340px;
      max-height: 70vh;
      padding: 10px;
      border-radius: 12px;
      background: rgba(15,23,42,.78);
      border: 1px solid rgba(255,255,255,.2);
      font-family: ui-sans-serif, system-ui, sans-serif;
      color: #fff;
      display: none;
      gap: 6px;
      overflow-y: auto;
      overflow-x: hidden;
      box-sizing: border-box;
      grid-template-columns: 1fr;
      z-index: 880;
    }
    .prop-panel.active { display: grid; }
    .prop-field {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      font-size: 12px;
    }
    .prop-panel input,
    .prop-panel select {
      background: rgba(0,0,0,.35);
      color: #fff;
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 6px;
      padding: 2px 6px;
      font-size: 12px;
      font-family: inherit;
    }
    .prop-panel input[type="range"] {
      padding: 0;
      accent-color: #22c55e;
      width: 120px;
    }
    .prop-panel input[type="number"] {
      width: 70px;
    }
    .prop-panel select {
      width: 150px;
    }
    .los-panel {
      position: absolute;
      top: 18px;
      right: 18px;
      width: 320px;
      max-height: 70vh;
      padding: 10px;
      border-radius: 12px;
      background: rgba(15,23,42,.78);
      border: 1px solid rgba(255,255,255,.2);
      color: #fff;
      font-family: ui-sans-serif, system-ui, sans-serif;
      display: none;
      z-index: 900;
      overflow: hidden;
      box-sizing: border-box;
    }
    .los-panel.active { display: block; }
    .los-panel .los-profile { margin-top: 6px; }
    .los-panel .map-toggle { width: 100%; margin-top: 6px; }
    .history-panel {
      position: absolute;
      top: 18px;
      right: 18px;
      width: 320px;
      max-height: 50vh;
      padding: 10px;
      border-radius: 12px;
      background: rgba(15,23,42,.78);
      border: 1px solid rgba(255,255,255,.2);
      color: #fff;
      font-family: ui-sans-serif, system-ui, sans-serif;
      display: none;
      z-index: 890;
      overflow: hidden;
      box-sizing: border-box;
    }
    .history-panel.active { display: block; }
    .history-field {
      display: grid;
      gap: 6px;
      margin-top: 6px;
      font-size: 12px;
    }
    .history-panel input {
      background: rgba(0,0,0,.35);
      color: #fff;
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 6px;
      padding: 2px 6px;
      font-size: 12px;
      font-family: inherit;
    }
    .history-panel input[type="range"] {
      padding: 0;
      accent-color: #f59e0b;
      width: 100%;
    }
    @media (max-width: 900px) {
      .los-panel,
      .prop-panel,
      .history-panel {
        top: auto;
        right: 12px;
        left: 12px;
        bottom: 12px;
        width: auto;
        max-height: 45vh;
      }
    }
    .prop-hint {
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 14px;
      height: 14px;
      margin-left: 6px;
      color: #cbd5f5;
      cursor: help;
      font-weight: 600;
    }
    .prop-hint::after {
      content: attr(data-tooltip);
      position: absolute;
      left: 18px;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(15, 23, 42, 0.95);
      color: #fff;
      padding: 4px 6px;
      border-radius: 6px;
      font-size: 11px;
      white-space: nowrap;
      opacity: 0;
      pointer-events: none;
      z-index: 10;
      box-shadow: 0 6px 16px rgba(0,0,0,.25);
      transition: opacity 120ms ease;
    }
    .prop-hint:hover::after,
    .prop-hint:focus::after {
      opacity: 1;
    }
    .leaflet-popup-content { max-width: 260px; overflow-wrap: anywhere; word-break: break-word; }
    .popup-title { display: block; font-weight: 600; }
    .popup-id { display: block; opacity: 0.85; }
    .popup-topic { display: inline-block; overflow-wrap: anywhere; word-break: break-word; }
    .popup-sample { margin-top: 6px; padding-top: 6px; border-top: 1px solid rgba(15, 23, 42, 0.15); }
    .dark-map .popup-sample { border-top-color: rgba(255,255,255,.16); }
    .dark-map .leaflet-popup-content-wrapper {
      background: rgba(15, 23, 42, 0.96);
      color: #f8fafc;
      border: 1px solid rgba(255,255,255,.16);
      box-shadow: 0 10px 24px rgba(0,0,0,.35);
    }
    .dark-map .leaflet-popup-tip {
      background: rgba(15, 23, 42, 0.96);
    }
    .dark-map .leaflet-popup-close-button {
      color: #f8fafc;
    }
    .los-profile {
      margin-top: 6px;
      padding: 6px 8px;
      border-radius: 10px;
      background: rgba(15,23,42,.35);
      border: 1px solid rgba(255,255,255,.15);
      position: relative;
    }
    .los-profile-title { margin-bottom: 4px; }
    .los-profile svg { width: 100%; height: 86px; display: block; }
    .los-profile-terrain { fill: none; stroke: rgba(226,232,240,.85); stroke-width: 2; }
    .los-profile-los { fill: none; stroke-width: 2; }
    .los-profile-tooltip {
      position: absolute;
      top: 6px;
      left: 6px;
      background: rgba(15,23,42,.92);
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 8px;
      padding: 4px 6px;
      font-size: 11px;
      color: #fff;
      pointer-events: none;
      white-space: nowrap;
      transform: translate(-50%, -120%);
    }
    .trail-animated {
      stroke-dasharray: 6 10;
      animation: trail-dash 6s linear infinite;
    }
    @keyframes trail-dash {
      to { stroke-dashoffset: -120; }
    }
    .route-animated {
      stroke-dasharray: 12 18;
      animation: route-dash 8s linear infinite;
      stroke-linecap: butt;
      stroke-linejoin: miter;
    }
    @keyframes route-dash {
      to { stroke-dashoffset: -200; }
    }