:root {
  --top-bar-height: 64px;
  --top-bar-bg: #f2f2f2;
  --top-bar-border: #d7d7d7;
  --top-bar-text: #1f1f1f;
  --icon-btn-bg: #ffffff;
  --icon-btn-color: #333333;
  --icon-btn-hover-bg: #e4e4e4;
  --icon-btn-active-bg: #483f91;
  --icon-btn-active-color: #ffffff;
}

body, html { margin:0; padding:0; height:100%; }
body {
  font-family: Arial, Helvetica, sans-serif;
  color: #1f1f1f;
  background-color: #ffffff;
}
#map {
  width: 100%;
  height: calc(100% - var(--top-bar-height));
  margin-top: var(--top-bar-height);
}

.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--top-bar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--top-bar-bg);
  color: var(--top-bar-text);
  border-bottom: 1px solid var(--top-bar-border);
  z-index: 1100;
}
.top-bar__brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.top-bar__logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: contain;
}
.top-bar__title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.top-bar__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.top-bar__icon-btn {
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 50%;
  background: var(--icon-btn-bg);
  color: var(--icon-btn-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.top-bar__icon-btn:hover {
  background: var(--icon-btn-hover-bg);
  transform: translateY(-1px);
}
.top-bar__icon-btn:focus-visible {
  outline: 2px solid #483f91;
  outline-offset: 2px;
}
.top-bar__icon-btn.is-active {
  background: var(--icon-btn-active-bg);
  color: var(--icon-btn-active-color);
  box-shadow: 0 4px 12px rgba(72, 63, 145, 0.35);
}
.top-bar__icon-btn i {
  pointer-events: none;
}

#filter-panel {
  position: fixed;
  top: calc(var(--top-bar-height) + 12px);
  right: 16px;
  width: 280px;
  max-height: 60vh;
  overflow-y: auto;
  padding: 16px;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
  font-family: Arial, Helvetica, sans-serif;
  color: #1f1f1f;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 1200;
}
#filter-panel.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
#filter-panel strong {
  display: block;
  margin-bottom: 12px;
  font-size: 16px;
}
#filter-panel #toggle-all-btn {
  width: 100%;
  margin: 8px 0 12px;
}
#filter-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.filter-line-label-text {
  color: inherit;
}

.filter-line-count {
  position: relative;
  margin-left: auto;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--badge-bg, rgba(0, 0, 0, 0.08));
  border: 1px solid var(--badge-border-color, rgba(0, 0, 0, 0.12));
  color: var(--badge-color, #333333);
  font-size: 12px;
  font-weight: 700;
  min-width: 34px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
  opacity: 0.65;
}
.filter-line-count.is-active {
  background: var(--badge-active-bg, var(--badge-bg, rgba(0, 0, 0, 0.12)));
  box-shadow: 0 6px 14px var(--badge-shadow-color, rgba(0, 0, 0, 0.16));
  opacity: 1;
}

@media (max-width: 640px) {
  :root {
    --top-bar-height: 56px;
  }
  .top-bar {
    padding: 0 12px;
  }
  .top-bar__logo {
    width: 32px;
    height: 32px;
  }
  .top-bar__title {
    font-size: 18px;
  }
  .top-bar__icon-btn {
    width: 38px;
    height: 38px;
    font-size: 16px;
  }
  #filter-panel {
    width: min(260px, calc(100% - 24px));
    right: 12px;
    top: calc(var(--top-bar-height) + 8px);
  }
}

    #update_timer {
      position: absolute;
      bottom: 40px;
      left: 10px;
      z-index: 1000;
      background: rgba(255,255,255,0.9);
      padding: 6px 8px;
      font-family: Arial, Helvetica, sans-serif;
      font-size: 14px;
      border-radius: 4px;
    }

    #track_hint {
      position: absolute;
      bottom: 10px;
      left: 10px;
      z-index: 1000;
      background: rgba(255,255,255,0.9);
      padding: 6px 8px;
      font-family: Arial, Helvetica, sans-serif;
      font-size: 14px;
      border-radius: 4px;
    }

    .follow-btn {
      margin-top: 5px;
      padding: 6px 12px;
      font-size: 14px;
      font-weight: 600;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      transition: background 0.2s ease, color 0.2s ease;
      background-color: #f0f0f0;
      color: #222;
    }

    .follow-btn:hover {
      background-color: #ddd;
    }

    /* === Mode sombre pour le corps, le panneau et les boutons === */
body.dark-mode {
  --top-bar-bg: #1f1f2b;
  --top-bar-border: #2c2c3e;
  --top-bar-text: #f0f0f0;
  --icon-btn-bg: #2f2f41;
  --icon-btn-color: #f0f0f0;
  --icon-btn-hover-bg: #3a3a50;
  --icon-btn-active-bg: #7868ff;
  --icon-btn-active-color: #ffffff;
  background-color: #2b2b2b;
  color: #ddd;
}
body.dark-mode #map {
  filter: brightness(0.8);
}
body.dark-mode #filter-panel {
  background: rgba(30, 30, 40, 0.96);
  color: #f0f0f0;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}
body.dark-mode #filter-panel strong {
  color: #ffffff;
}
body.dark-mode .checkbox-wrapper label {
  color: #ccc;
}
body.dark-mode .checkbox-wrapper label::before {
  border-color: #666;
  background: #333;
}
body.dark-mode .checkbox-wrapper input:checked + label::before {
  background: currentColor;
}
body.dark-mode #toggle-all-btn {
  background-color: #555;
  color: #eee;
}
body.dark-mode #toggle-all-btn:hover {
  background-color: #444;
}
body.dark-mode #update_timer,
body.dark-mode #track_hint {
  background: rgba(40, 40, 40, 0.9);
  color: #ddd;
}
body.dark-mode .follow-btn {
  background-color: #333;
  color: #eee;
}
body.dark-mode .follow-btn:hover {
  background-color: #555;
}
body.dark-mode .filter-line-count {
  background: var(--badge-bg, rgba(255, 255, 255, 0.1));
  border-color: var(--badge-border-color, rgba(255, 255, 255, 0.18));
  color: var(--badge-color, #f1f1f1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}
body.dark-mode .filter-line-count.is-active {
  background: var(--badge-active-bg, var(--badge-bg, rgba(255, 255, 255, 0.16)));
  box-shadow: 0 8px 18px var(--badge-shadow-color, rgba(0, 0, 0, 0.55));
  color: var(--badge-color, #ffffff);
}
body.dark-mode #filter-panel::-webkit-scrollbar {
  width: 8px;
}
body.dark-mode #filter-panel::-webkit-scrollbar-track {
  background: #333;
}
body.dark-mode #filter-panel::-webkit-scrollbar-thumb {
  background: #555;
  border-radius: 4px;
}
    #vehicle-info-panel {
      position: absolute;
      top: calc(var(--top-bar-height) + 26px);
      left: 10px;
      width: 260px;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      border-radius: 12px;
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
      padding: 16px;
      font-family: Arial, Helvetica, sans-serif;
      color: #1f1f1f;
      --vehicle-line-color: #4caf50;
      display: none;
      flex-direction: column;
      gap: 12px;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    #vehicle-info-panel.is-collapsed {
      padding-top: 12px;
      padding-bottom: 12px;
      gap: 0;
    }
    #vehicle-info-panel.is-collapsed .vehicle-info-content {
      gap: 0;
    }
    #vehicle-info-panel.is-collapsed .vehicle-info-content > :not(.vehicle-info-header-row) {
      display: none;
    }
    #vehicle-info-panel:hover {
      transform: translateY(-1px);
      box-shadow: 0 14px 28px rgba(0, 0, 0, 0.15);
    }
    #vehicle-info-panel:not(.is-empty) {
      display: flex;
    }
    #vehicle-info-panel .vehicle-info-placeholder {
      font-size: 14px;
      color: #555;
      line-height: 1.4;
    }
    #vehicle-info-panel .vehicle-info-content {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    #vehicle-info-panel .vehicle-info-header-row {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    #vehicle-info-panel .vehicle-info-divider {
      height: 1px;
      background: rgba(0, 0, 0, 0.1);
      margin: 4px 0 2px;
    }
    #vehicle-info-panel .vehicle-info-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      flex: 1;
      min-width: 0;
      background: none;
      border: none;
      padding: 0;
      font: inherit;
      color: inherit;
      cursor: pointer;
    }
    #vehicle-info-panel .vehicle-info-close {
      position: relative;
      flex: none;
      width: 28px;
      height: 28px;
      border: none;
      border-radius: 999px;
      background: rgba(86, 77, 215, 0.08);
      color: #564dd7;
      cursor: pointer;
      transition: background 0.2s ease, color 0.2s ease;
    }
    #vehicle-info-panel .vehicle-info-close::before,
    #vehicle-info-panel .vehicle-info-close::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      width: 12px;
      height: 2px;
      background: currentColor;
      border-radius: 1px;
      transform-origin: center;
    }
    #vehicle-info-panel .vehicle-info-close::before {
      transform: translate(-50%, -50%) rotate(45deg);
    }
    #vehicle-info-panel .vehicle-info-close::after {
      transform: translate(-50%, -50%) rotate(-45deg);
    }
    #vehicle-info-panel .vehicle-info-close:hover {
      background: rgba(86, 77, 215, 0.16);
      color: #352cc4;
    }
    #vehicle-info-panel .vehicle-info-close:focus-visible {
      outline: 2px solid #564dd7;
      outline-offset: 2px;
    }
    #vehicle-info-panel .vehicle-info-header:disabled {
      cursor: default;
    }
    #vehicle-info-panel .vehicle-info-header:focus-visible {
      outline: 2px solid #564dd7;
      outline-offset: 2px;
    }
    #vehicle-info-panel .vehicle-info-toggle-indicator {
      width: 10px;
      height: 10px;
      margin-left: 8px;
      border-right: 2px solid #564dd7;
      border-bottom: 2px solid #564dd7;
      transform: rotate(45deg);
      transition: transform 0.2s ease;
    }
    #vehicle-info-panel .vehicle-info-header[aria-expanded="false"] .vehicle-info-toggle-indicator {
      transform: rotate(-135deg);
    }
    #vehicle-info-panel .vehicle-info-header:disabled .vehicle-info-toggle-indicator {
      opacity: 0.4;
    }
    #vehicle-info-panel .vehicle-info-badge {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: #564dd7;
    }
    #vehicle-info-panel .vehicle-info-id {
      font-size: 22px;
      font-weight: 700;
      color: #121212;
      flex: 1;
      text-align: right;
    }
    #vehicle-info-panel .vehicle-info-row {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      font-size: 14px;
      line-height: 1.35;
    }
    #vehicle-info-panel .vehicle-info-label {
      font-weight: 600;
      color: #666;
      min-width: 110px;
    }
    #vehicle-info-panel .vehicle-info-value {
      flex: 1;
      font-weight: 600;
      color: #222;
      text-align: right;
      word-break: break-word;
    }

    #vehicle-info-panel .vehicle-timeline-container {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    #vehicle-info-panel .vehicle-timeline-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }
    #vehicle-info-panel .vehicle-timeline-title {
      font-size: 12px;
      letter-spacing: 0.08em;
      font-weight: 700;
      text-transform: uppercase;
      color: #6b6b6b;
    }
    #vehicle-info-panel .vehicle-timeline-toggle {
      margin-left: auto;
      padding: 4px 8px;
      font-size: 11px;
      font-weight: 600;
      color: #483f91;
      background: rgba(72, 63, 145, 0.08);
      border: none;
      border-radius: 12px;
      cursor: pointer;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      transition: background 0.2s ease, color 0.2s ease;
    }
    #vehicle-info-panel .vehicle-timeline-toggle:hover {
      background: rgba(55, 45, 110, 0.18);
      color: #2c245f;
    }
    #vehicle-info-panel .vehicle-timeline-toggle.is-hidden {
      display: none;
    }
    #vehicle-info-panel .vehicle-timeline-container.is-expanded .vehicle-timeline-steps {
      max-height: 240px;
      overflow-y: auto;
      padding-right: 4px;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-title {
      color: #d0d0d0;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-toggle {
      color: #a8adff;
      background: rgba(168, 173, 255, 0.12);
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-toggle:hover {
      color: #ffffff;
      background: rgba(168, 173, 255, 0.24);
    }
    #vehicle-info-panel .vehicle-timeline-placeholder {
      font-size: 13px;
      color: #888;
      line-height: 1.4;
    }
    #vehicle-info-panel .vehicle-timeline-steps {
      position: relative;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    #vehicle-info-panel .vehicle-timeline-step {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 13px;
      line-height: 1.3;
    }
    #vehicle-info-panel .vehicle-timeline-axis {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 18px;
    }
    #vehicle-info-panel .vehicle-timeline-axis-line {
      position: relative;
      width: 3px;
      flex: 1;
      background: transparent;
    }
    #vehicle-info-panel .vehicle-timeline-axis-line::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: var(--timeline-segment-color, rgba(0, 0, 0, 0.12));
    }
    #vehicle-info-panel .vehicle-timeline-axis-line.is-colored::before {
      background: var(--vehicle-line-color);
    }
    #vehicle-info-panel .vehicle-timeline-axis-line.is-past::before {
      background: rgba(0, 0, 0, 0.25);
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-axis-line::before {
      background: rgba(255, 255, 255, 0.18);
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-axis-line.is-colored::before {
      background: var(--vehicle-line-color);
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-axis-line.is-past::before {
      background: rgba(200, 200, 200, 0.22);
    }
    #vehicle-info-panel .vehicle-timeline-axis-line.is-hidden {
      visibility: hidden;
    }
    #vehicle-info-panel .vehicle-timeline-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--vehicle-line-color);
      border: 2px solid #fff;
      box-shadow: 0 0 0 2px var(--vehicle-line-color);
    }
    #vehicle-info-panel .vehicle-timeline-step.is-past .vehicle-timeline-dot {
      background: #c3c3c3;
      box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
    }
    #vehicle-info-panel .vehicle-timeline-step.is-current .vehicle-timeline-dot {
      background: #fff;
      box-shadow: 0 0 0 3px var(--vehicle-line-color);
    }
    #vehicle-info-panel .vehicle-timeline-stop {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: 12px;
      flex: 1;
    }
    #vehicle-info-panel .vehicle-timeline-name {
      font-weight: 600;
      color: #1f1f1f;
    }
    #vehicle-info-panel .vehicle-timeline-time {
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 2px;
      font-size: 12px;
      color: #5a5a5a;
      font-weight: 600;
    }
    #vehicle-info-panel .vehicle-timeline-time-scheduled,
    #vehicle-info-panel .vehicle-timeline-time-eta {
      display: block;
    }
    #vehicle-info-panel .vehicle-timeline-time-scheduled.is-overridden {
      color: #9a9a9a;
      text-decoration: line-through;
    }
    #vehicle-info-panel .vehicle-timeline-time-eta {
      color: var(--vehicle-line-color);
      font-weight: 700;
    }
    #vehicle-info-panel .vehicle-timeline-time-eta.is-early {
      color: #2c9e5c;
    }
    #vehicle-info-panel .vehicle-timeline-time-eta.is-late {
      color: #c9594a;
    }
    #vehicle-info-panel .vehicle-timeline-step.is-past .vehicle-timeline-name,
    #vehicle-info-panel .vehicle-timeline-step.is-past .vehicle-timeline-time {
      color: #a0a0a0;
    }
    #vehicle-info-panel .vehicle-timeline-step.is-current .vehicle-timeline-name,
    #vehicle-info-panel .vehicle-timeline-step.is-current .vehicle-timeline-time {
      color: var(--vehicle-line-color);
    }
    #vehicle-info-panel .vehicle-timeline-container:not(.has-data) .vehicle-timeline-steps {
      display: none;
    }
    #vehicle-info-panel .vehicle-timeline-container.has-data .vehicle-timeline-placeholder {
      display: none;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-header {
      color: #9f9f9f;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-placeholder {
      color: #8c8c8c;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-name {
      color: #f1f1f1;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-time {
      color: #d5d5d5;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-time-scheduled.is-overridden {
      color: #7f7f7f;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-time-eta.is-early {
      color: #4fd484;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-time-eta.is-late {
      color: #ff7a6a;
    }
    body.dark-mode #vehicle-info-panel .vehicle-timeline-step.is-past .vehicle-timeline-name,
    body.dark-mode #vehicle-info-panel .vehicle-timeline-step.is-past .vehicle-timeline-time {
      color: #777;
    }

    #vehicle-info-panel.is-empty .vehicle-info-content {
      display: none;
    }
    #vehicle-info-panel.is-empty .vehicle-info-placeholder {
      display: block;
    }
    #vehicle-info-panel:not(.is-empty) .vehicle-info-placeholder {
      display: none;
    }
    body.dark-mode #vehicle-info-panel {
      background: rgba(36, 36, 45, 0.92);
      color: #e5e5e5;
      box-shadow: 0 14px 28px rgba(0, 0, 0, 0.4);
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-placeholder {
      color: #b0b0b0;
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-badge {
      color: #8f88ff;
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-close {
      background: rgba(255, 255, 255, 0.08);
      color: #d6d4ff;
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-close:hover {
      background: rgba(255, 255, 255, 0.15);
      color: #ffffff;
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-toggle-indicator {
      border-color: #d0d3ff;
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-id {
      color: #ffffff;
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-label {
      color: #c9c9c9;
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-value {
      color: #ffffff;
    }
    body.dark-mode #vehicle-info-panel .vehicle-info-divider {
      background: rgba(255, 255, 255, 0.15);
    }

    #loading-overlay {
      position: fixed;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(32, 32, 46, 0.92);
      color: #f0f0f0;
      font-family: Arial, Helvetica, sans-serif;
      z-index: 2000;
      transition: opacity 0.4s ease, visibility 0.4s ease;
    }
    #loading-overlay.is-hidden {
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
    }
    #loading-overlay .loading-panel {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 16px;
      padding: 32px 40px;
      border-radius: 18px;
      background: rgba(16, 16, 24, 0.85);
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
      max-width: 320px;
      text-align: center;
    }
    #loading-overlay .loading-spinner {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 4px solid rgba(255, 255, 255, 0.25);
      border-top-color: #7868ff;
      animation: overlay-spin 1s linear infinite;
    }
    #loading-overlay .loading-spinner.is-hidden {
      display: none;
    }
    #loading-overlay .loading-text {
      font-size: 16px;
      font-weight: 600;
      letter-spacing: 0.02em;
    }
    #loading-overlay.has-error .loading-text {
      color: #ff8a7a;
    }
    @keyframes overlay-spin {
      from { transform: rotate(0deg); }
      to { transform: rotate(360deg); }
    }