:host {
  color-scheme: light dark;
}

:root {
  /* Core colors */
  --bg: #ffffff;
  --fg: #111111;
  --border: #cccccc;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-active: #1e40af;
  --danger: #b42318;

  /* Button */
  --btn-bg: var(--bg);
  --btn-fg: var(--fg);
  --btn-border: var(--border);
  --btn-radius: 6px;

  /* Effects */
  --focus-ring: 0 0 0 2px rgba(37, 99, 235, 0.4);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0b;
    --fg: #e6e6e6;
    --border: #444444;
    --accent: #4ea1ff;
    --accent-hover: #78b7ff;
    --accent-active: #2f8fff;

    --btn-bg: #161616;
    --btn-border: #555;
  }
}


body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, sans-serif;
  padding: 1rem;

}

input,
button {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  font-size: 1rem;
}

.app-logo {
  height: 50px;
  width: auto;
}

.page {
  display: flex;
  flex-direction: column;
  /* space between elements */
  gap: 0.75rem;
  /* ← THIS */
}

.toprow {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  grid-template-rows: auto;
  gap: 1rem;
  align-items: center;
}

/* Right column */
#serialUi {
  grid-column: 1;
  grid-row: 1;
  justify-self: start;
}

/* Center column */
.app-title {
  grid-column: 3;
  grid-row: 1;
  margin: 0;
  font-size: 1.5rem;
  font-weight: bold;
}

serial-ui {
  display: block;
}

.hozdiv {
  display: flex;
  flex-direction: row;
  /* horizontal */
  align-items: center;
  /* vertical centering */
  gap: 1rem;
  /* space between items */

  align-items: stretch;
  /* ← THIS is the key */
}

#cmdPanelWrap .two-col {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 12px;
  min-width: 0;
}