:root {
  color-scheme: light;
  --bg: #f5f6f3;
  --panel: #ffffff;
  --text: #1f2428;
  --muted: #667070;
  --line: #d9ded9;
  --accent: #006d77;
  --accent-strong: #004f58;
  --danger: #b42318;
  --danger-dark: #7a271a;
  --shadow: 0 8px 24px rgba(31, 36, 40, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button,
input {
  font: inherit;
}

button {
  min-height: 40px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: white;
  padding: 8px 12px;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--accent-strong);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button.danger {
  min-width: 112px;
  border-color: var(--danger);
  background: var(--danger);
  font-weight: 700;
}

button.danger:hover:not(:disabled) {
  background: var(--danger-dark);
}

input {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--text);
  padding: 7px 9px;
}

h1,
h2,
p,
dl,
dd,
pre {
  margin: 0;
}

h1 {
  font-size: 24px;
  font-weight: 750;
}

h2 {
  font-size: 15px;
  font-weight: 750;
}

.app-shell {
  min-height: 100vh;
  padding: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0 auto 16px;
  max-width: 1320px;
}

.topbar p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(260px, 0.95fr) minmax(320px, 1.2fr) minmax(300px, 1fr);
  gap: 14px;
  max-width: 1320px;
  margin: 0 auto;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 14px;
}

.connection-panel,
.status-panel,
.utility-panel {
  grid-column: 1;
}

.joystick-panel {
  grid-column: 2;
  grid-row: 1 / span 3;
}

.command-panel {
  grid-column: 3;
  grid-row: 1 / span 3;
}

.log-panel {
  grid-column: 1 / -1;
}

.panel,
.command-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel-heading,
.button-row,
.readout-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.button-row button,
.button-grid button {
  flex: 1;
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.field {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.segmented label {
  display: block;
}

.segmented input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
}

.segmented span {
  display: block;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  text-align: center;
  color: var(--muted);
  background: #f8faf8;
}

.segmented input:checked + span {
  border-color: var(--accent);
  background: #e7f2f2;
  color: var(--accent-strong);
  font-weight: 750;
}

.status-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.status-grid div {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px;
}

.status-grid dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
}

.status-grid dd {
  margin-top: 4px;
  font-size: 20px;
  font-weight: 750;
  font-variant-numeric: tabular-nums;
}

.joystick-pad {
  position: relative;
  width: min(100%, 440px);
  aspect-ratio: 1;
  margin: 2px auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    radial-gradient(circle at center, rgba(0, 109, 119, 0.08) 0 18%, transparent 19%),
    #fbfcfb;
  touch-action: none;
  user-select: none;
}

.joystick-crosshair {
  position: absolute;
  background: #ccd5cf;
}

.joystick-crosshair.horizontal {
  left: 10%;
  right: 10%;
  top: 50%;
  height: 1px;
}

.joystick-crosshair.vertical {
  top: 10%;
  bottom: 10%;
  left: 50%;
  width: 1px;
}

.joystick-stick {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 54px;
  height: 54px;
  border: 3px solid white;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 8px 18px rgba(0, 79, 88, 0.25);
  transform: translate(-50%, -50%);
}

.readout-row {
  color: var(--muted);
  font-size: 14px;
}

.readout-row strong {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

#log-output {
  min-height: 160px;
  max-height: 260px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #161b1d;
  color: #d8efdf;
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
}

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 1fr 1fr;
  }

  .connection-panel,
  .status-panel,
  .utility-panel,
  .joystick-panel,
  .command-panel,
  .log-panel {
    grid-column: auto;
    grid-row: auto;
  }

  .log-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  .app-shell {
    padding: 12px;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  button.danger {
    width: 100%;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .log-panel {
    grid-column: auto;
  }
}