:root {
  --bg:        #f0f0f0;
  --bg-sec:    #e8e8e8;
  --bg-plot:   #ffffff;
  --accent:    #d4d4d4;
  --accent-hv: #c0c0c0;
  --border:    #a0a0a0;
  --text:      #000000;
  --text-dim:  #555555;
  --slider-fg: #4a7abc;
  --danger:    #cc0000;
  --warning:   #cc8800;
}


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

body {
  font-family: "DejaVu Sans Mono", "Consolas", monospace;
  font-size: 12px;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}


.toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: var(--bg-sec);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.toolbar button,
.toolbar label {
  font-family: inherit;
  font-size: 11px;
  padding: 3px 12px;
  background: var(--accent);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
}

.toolbar button:hover,
.toolbar label:hover {
  background: var(--accent-hv);
}

.toolbar .sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 4px;
}

.toolbar select {
  font-family: inherit;
  font-size: 11px;
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #fff;
  min-width: 200px;
}

.toolbar .file-label {
  color: var(--text-dim);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toolbar input[type="file"] {
  display: none;
}

.toolbar .cb-label {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  font-size: 11px;
}

.toolbar .cb-label input {
  accent-color: var(--slider-fg);
}


.main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.plot-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.plots {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  flex: 1;
  gap: 0;
}

#topdown      { grid-row: 1 / 3; grid-column: 1; }
#accel-panel  { grid-row: 1;     grid-column: 2; }
#steer-panel  { grid-row: 2;     grid-column: 2; }

.plot-container {
  background: var(--bg-plot);
  border: 1px solid var(--border);
  position: relative;
}


.watch-panel {
  width: 220px;
  background: var(--bg-sec);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  flex-shrink: 0;
  padding: 4px;
}

.watch-panel h3 {
  font-size: 12px;
  padding: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.watch-row {
  display: flex;
  justify-content: space-between;
  padding: 1px 4px;
  font-size: 10px;
}

.watch-row .wname { color: var(--text-dim); }
.watch-row .wval  { text-align: right; }


.bp-section h4 {
  font-size: 11px;
  margin-top: 8px;
  padding: 4px;
  border-top: 1px solid var(--border);
}

.bp-item   { font-size: 9px; padding: 1px 4px; }
.bp-status { color: var(--danger); font-size: 9px; padding: 2px 4px; min-height: 14px; }


.transport {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  background: var(--bg-sec);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.transport button {
  font-family: inherit;
  font-size: 11px;
  padding: 3px 10px;
  background: var(--accent);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
}

.transport button:hover { background: var(--accent-hv); }
.transport input[type=range] { flex: 1; accent-color: var(--slider-fg); }
.transport .frame-info { font-size: 12px; min-width: 140px; text-align: right; }
.transport .sep { width: 1px; height: 18px; background: var(--border); margin: 0 2px; }
.transport .speed-label { font-size: 10px; color: var(--text-dim); }
.transport select {
  font-family: inherit;
  font-size: 11px;
  padding: 2px 4px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #fff;
}


.status-bar {
  font-size: 9px;
  color: var(--text-dim);
  padding: 2px 8px;
  background: var(--bg-sec);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.loading {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-box {
  background: #fff;
  padding: 20px 40px;
  border-radius: 4px;
  font-size: 14px;
}

.hidden { display: none !important; }

.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.modal-content {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px 24px;
  min-width: 360px;
  font-family: inherit;
}

.modal-content h3 {
  font-size: 13px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.config-grid {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 8px 12px;
  align-items: center;
  margin-bottom: 16px;
}

.config-grid label {
  font-size: 11px;
  color: var(--text);
}

.config-grid input {
  font-family: inherit;
  font-size: 11px;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: #fff;
  width: 100%;
}

.modal-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.modal-buttons button {
  font-family: inherit;
  font-size: 11px;
  padding: 4px 16px;
  background: var(--accent);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
}

.modal-buttons button:hover {
  background: var(--accent-hv);
}