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,
    .prop-panel,
    .peers-panel,
    .node-search-results {
      scrollbar-width: thin;
      scrollbar-color: rgba(148, 163, 184, .7) rgba(15, 23, 42, .35);
    }

    .hud::-webkit-scrollbar,
    .prop-panel::-webkit-scrollbar,
    .peers-panel::-webkit-scrollbar,
    .node-search-results::-webkit-scrollbar {
      width: 10px;
    }

    .hud::-webkit-scrollbar-track,
    .prop-panel::-webkit-scrollbar-track,
    .peers-panel::-webkit-scrollbar-track,
    .node-search-results::-webkit-scrollbar-track {
      background: rgba(15, 23, 42, .35);
      border-radius: 8px;
    }

    .hud::-webkit-scrollbar-thumb,
    .prop-panel::-webkit-scrollbar-thumb,
    .peers-panel::-webkit-scrollbar-thumb,
    .node-search-results::-webkit-scrollbar-thumb {
      background: rgba(148, 163, 184, .7);
      border-radius: 8px;
      border: 2px solid rgba(15, 23, 42, .35);
    }

    .hud::-webkit-scrollbar-thumb:hover,
    .prop-panel::-webkit-scrollbar-thumb:hover,
    .peers-panel::-webkit-scrollbar-thumb:hover,
    .node-search-results::-webkit-scrollbar-thumb:hover {
      background: rgba(226, 232, 240, .85);
    }

    .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;
    }

    .los-field {
      display: grid;
      gap: 6px;
      margin-top: 6px;
      font-size: 12px;
    }

    .los-field.los-inline {
      grid-auto-flow: column;
      grid-auto-columns: max-content;
      align-items: center;
      gap: 8px;
    }

    .los-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 {
      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;
      pointer-events: auto;
    }

    .history-panel.active {
      display: block;
    }

    .panel-close {
      position: absolute;
      top: 8px;
      right: 8px;
      width: 28px;
      height: 28px;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, .2);
      background: rgba(15, 23, 42, .5);
      color: #fff;
      font-size: 18px;
      line-height: 24px;
      cursor: pointer;
      pointer-events: auto;
      z-index: 1;
    }

    .panel-close:hover {
      background: rgba(255, 255, 255, .18);
    }

    .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%;
    }

    .peers-panel {
      position: absolute;
      top: 18px;
      right: 18px;
      width: 320px;
      max-height: 60vh;
      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: 885;
      overflow-y: auto;
      overflow-x: hidden;
      box-sizing: border-box;
    }

    .peers-panel.active {
      display: block;
    }

    .route-details-panel {
      position: absolute;
      top: 18px;
      right: 18px;
      width: 320px;
      max-height: 75vh;
      padding: 10px;
      border-radius: 12px;
      background: rgba(15, 23, 42, .92);
      border: 1px solid rgba(255, 255, 255, .2);
      color: #fff;
      font-family: ui-sans-serif, system-ui, sans-serif;
      display: none;
      z-index: 895;
      overflow-y: auto;
      overflow-x: hidden;
      box-sizing: border-box;
    }

    .route-details-panel.active {
      display: block;
    }

    .route-details-content {
      margin-top: 8px;
      display: grid;
      gap: 4px;
    }

    .hop-row {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 4px;
      background: rgba(255, 255, 255, .05);
      border-radius: 6px;
      font-size: 12px;
    }

    .hop-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 18px;
      height: 18px;
      border-radius: 50%;
      color: #fff;
      font-weight: bold;
      font-size: 10px;
      flex-shrink: 0;
    }

    .hop-info {
      flex: 1;
      overflow: hidden;
    }

    .hop-name {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      font-weight: 600;
      opacity: 0.9;
    }

    .hop-meta {
      opacity: 0.7;
      font-size: 11px;
    }

    .hop-marker {
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      color: #fff;
      font-weight: bold;
      font-size: 10px;
      border: 1px solid rgba(255, 255, 255, 0.8);
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    }

    .peer-section {
      display: grid;
      gap: 6px;
      margin-top: 8px;
    }

    .peer-heading {
      opacity: 0.8;
    }

    .peer-list {
      display: grid;
      gap: 4px;
    }

    .peer-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      padding: 4px 6px;
      border-radius: 8px;
      background: rgba(0, 0, 0, .25);
      font-size: 12px;
      cursor: pointer;
    }

    .peer-item:hover {
      background: rgba(255, 255, 255, .08);
    }

    .peer-item .peer-name {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .peer-item .peer-count {
      opacity: 0.8;
      font-variant-numeric: tabular-nums;
    }

    @media (max-width: 900px) {

      .los-panel,
      .prop-panel,
      .history-panel,
      .peers-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;
      pointer-events: auto;
    }

    @keyframes route-dash {
      to {
        stroke-dashoffset: -200;
      }
    }

    .hud-update {
      margin-top: 8px;
      padding: 8px 10px;
      border-radius: 12px;
      background: rgba(249, 115, 22, 0.12);
      border: 1px solid rgba(249, 115, 22, 0.4);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      font-size: 12px;
      color: #fed7aa;
      position: relative;
      z-index: 2;
      pointer-events: auto;
    }

    .hud-update[hidden] {
      display: none !important;
    }

    .hud-update-text {
      font-weight: 600;
    }

    .hud-update-dismiss {
      margin-top: 0;
      pointer-events: auto;
    }