/* ===== RESET & ROOT ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg0: #080a0d;
  --bg1: #0d1117;
  --bg2: #121820;
  --bg3: #1a2230;
  --border: #1e2d3d;
  --border-hi: #2e4460;
  --accent: #00c8ff;
  --accent2: #00ff9d;
  --warn: #ffaa00;
  --danger: #ff2d55;
  --muted: #4a6278;
  --text: #c8d8e8;
  --text-dim: #607080;
  --text-bright: #e8f4ff;
  --mono: 'Share Tech Mono', monospace;
  --sans: 'Barlow', sans-serif;
  --cond: 'Barlow Condensed', sans-serif;
  --grid-cols: 280px 1fr 300px;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg0);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
}

/* ===== TOPBAR ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
  background: var(--bg1);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  flex-shrink: 0;
}

.topbar-left { display: flex; align-items: center; gap: 12px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.topbar-center { display: flex; align-items: center; gap: 8px; }

.logo {
  font-family: var(--cond);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-bright);
  letter-spacing: 0.1em;
}
.logo-bracket { color: var(--accent); }
.logo-sub { color: var(--accent2); font-size: 14px; }

.system-label {
  font-family: var(--cond);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--muted);
}

.topbar-divider {
  width: 1px;
  height: 20px;
  background: var(--border);
}

.conn-indicator {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 6px var(--warn);
  transition: all 0.3s;
}
.conn-indicator.connected { background: var(--accent2); box-shadow: 0 0 6px var(--accent2); }
.conn-indicator.error { background: var(--danger); box-shadow: 0 0 6px var(--danger); }

.conn-label {
  font-family: var(--cond);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--warn);
  transition: color 0.3s;
}
.conn-label.connected { color: var(--accent2); }

.mono { font-family: var(--mono); }
.uptime-label { font-size: 11px; color: var(--text-dim); font-family: var(--mono); }

/* ===== MAIN GRID ===== */
body { display: flex; flex-direction: column; }

main.grid {
  flex: 1;
  display: grid;
  grid-template-columns: var(--grid-cols);
  gap: 0;
  overflow: hidden;
  min-height: 0;
}

/* ===== PANELS ===== */
.panel {
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg1);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.panel-left  { border-right: 1px solid var(--border); }
.panel-right { border-left: 1px solid var(--border); display: flex; flex-direction: column; overflow: hidden; }
.panel-center { background: var(--bg0); }

.panel-section {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.section-title {
  font-family: var(--cond);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  margin-left: 8px;
}

/* ===== DRIVE MODE ===== */
.mode-row { display: flex; gap: 6px; }
.mode-btn {
  flex: 1;
  padding: 7px 0;
  background: transparent;
  border: 1px solid var(--border-hi);
  color: var(--text-dim);
  font-family: var(--cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.2s;
}
.mode-btn:hover { border-color: var(--accent); color: var(--accent); }
.mode-btn.active { background: var(--accent); color: var(--bg0); border-color: var(--accent); }

/* ===== D-PAD ===== */
.dpad-grid {
  display: grid;
  grid-template-columns: repeat(3, 44px);
  grid-template-rows: repeat(3, 44px);
  gap: 4px;
  justify-content: center;
}
.dkey {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg2);
  border: 1px solid var(--border-hi);
  color: var(--text-dim);
  font-size: 16px;
  cursor: default;
  transition: all 0.08s;
  user-select: none;
}
.dkey.active { background: var(--accent); color: var(--bg0); border-color: var(--accent); box-shadow: 0 0 8px var(--accent); }
.center-key { font-size: 20px; cursor: pointer; }
.center-key:hover { background: var(--danger); color: #fff; border-color: var(--danger); }

.key-hint { font-size: 10px; color: var(--text-dim); text-align: center; letter-spacing: 0.06em; }

/* ===== ACTUATOR BARS ===== */
.actuator-row { display: flex; align-items: center; gap: 8px; }
.actuator-label { font-family: var(--cond); font-size: 10px; font-weight: 700; color: var(--muted); width: 28px; letter-spacing: 0.1em; }
.bar-track {
  flex: 1; height: 8px;
  background: var(--bg3);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  background: var(--accent2);
  width: 0%;
  transition: width 0.05s, background 0.2s;
}
.center-bar .center-fill {
  position: absolute;
  left: 50%;
  top: 0;
  height: 100%;
  width: 0%;
  transform-origin: left;
  background: var(--accent);
}
.actuator-val { font-size: 11px; color: var(--text); width: 36px; text-align: right; }

/* ===== STAT CARDS ===== */
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.stat-label { font-family: var(--cond); font-size: 9px; font-weight: 700; letter-spacing: 0.14em; color: var(--muted); }
.stat-val { font-family: var(--mono); font-size: 16px; color: var(--text-bright); }

.battery-bar-wrap { background: var(--bg3); height: 4px; border: 1px solid var(--border); margin-top: 2px; }
.battery-bar { height: 100%; background: var(--accent2); width: 100%; transition: width 0.3s, background 0.3s; }
.battery-bar.warn { background: var(--warn); }
.battery-bar.danger { background: var(--danger); }

/* ===== E-STOP ===== */
.estop-btn {
  width: 100%;
  padding: 12px;
  background: var(--danger);
  border: 2px solid #ff6680;
  color: #fff;
  font-family: var(--cond);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: all 0.1s;
}
.estop-btn:hover { background: #ff5070; box-shadow: 0 0 16px var(--danger); }
.estop-btn:active { transform: scale(0.98); }

.recharge-btn {
  width: 100%;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--accent2);
  color: var(--accent2);
  font-family: var(--cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: all 0.15s;
}
.recharge-btn:hover { background: var(--accent2); color: var(--bg0); }

.release-btn {
  width: 100%;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--accent2);
  color: var(--accent2);
  font-family: var(--cond);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
  margin-top: 6px;
  transition: all 0.15s;
}
.release-btn:hover { background: var(--accent2); color: var(--bg0); }

/* ===== CAMERA ===== */
.camera-wrap {
  position: relative;
  background: #000;
  border: 1px solid var(--border-hi);
  overflow: hidden;
  aspect-ratio: 4/3;
}
#camera-feed { width: 100%; height: 100%; object-fit: cover; display: block; }

.camera-overlay {
  position: absolute; inset: 0;
  background: rgba(255, 30, 60, 0.15);
  border: 3px solid var(--danger);
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--danger);
  font-family: var(--cond);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2em;
  animation: blink 0.8s step-end infinite;
}
.camera-overlay.active { display: flex; }
@keyframes blink { 50% { opacity: 0.4; } }

/* ===== BOTTOM HUD ===== */
.bottom-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg1);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.hud-block { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.hud-label { font-family: var(--cond); font-size: 9px; font-weight: 700; letter-spacing: 0.15em; color: var(--muted); }
.hud-big { font-family: var(--mono); font-size: 28px; color: var(--accent); line-height: 1; }
.hud-unit { font-family: var(--cond); font-size: 10px; color: var(--text-dim); }

.compass-wrap { position: relative; display: flex; align-items: center; justify-content: center; }
#compass { display: block; }
.compass-center {
  position: absolute;
  font-size: 13px;
  color: var(--accent2);
  pointer-events: none;
}

/* ===== MAP ===== */
#map {
  flex: 1;
  min-height: 220px;
  border: 1px solid var(--border-hi);
  background: var(--bg2);
}

/* Leaflet dark theme override */
.leaflet-control-attribution { display: none !important; }
.leaflet-tile { filter: brightness(0.6) saturate(0.4) hue-rotate(160deg); }
.leaflet-control-attribution { background: rgba(0,0,0,0.5) !important; color: #4a6278 !important; }
.leaflet-control-zoom a { background: var(--bg2) !important; color: var(--accent) !important; border-color: var(--border) !important; }

.wp-hint { font-size: 10px; color: var(--text-dim); text-align: center; letter-spacing: 0.06em; }
.map-clear-btn {
  background: transparent;
  border: 1px solid var(--border-hi);
  color: var(--text-dim);
  font-family: var(--cond);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  padding: 2px 8px;
  margin-left: 0;
}
.map-clear-btn:hover { border-color: var(--danger); color: var(--danger); }
/* override section-title ::after for map title */
.section-title .map-clear-btn { margin-left: 8px; }

/* ===== IMU ===== */
.imu-grid { display: flex; flex-direction: column; gap: 6px; }
.imu-row { display: flex; gap: 8px; align-items: center; }
.imu-label { font-family: var(--cond); font-size: 10px; font-weight: 700; color: var(--muted); width: 18px; letter-spacing: 0.1em; }
.imu-val { font-size: 12px; color: var(--text); flex: 1; }

/* ===== WAYPOINT LIST ===== */
.wp-list { display: flex; flex-direction: column; gap: 4px; max-height: 160px; overflow-y: auto; }
.wp-empty { font-size: 11px; color: var(--text-dim); text-align: center; padding: 8px 0; font-family: var(--mono); }
.wp-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 5px 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text);
}
.wp-item.reached { border-color: var(--accent2); color: var(--text-dim); }
.wp-del-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
  flex-shrink: 0;
  transition: color 0.15s;
}
.wp-del-btn:hover { color: var(--danger); }
.wp-item.active-wp { border-color: var(--accent); color: var(--accent); }
.wp-index { color: var(--muted); width: 18px; flex-shrink: 0; }

/* ===== LOG BAR ===== */
.logbar {
  height: 28px;
  display: flex;
  align-items: center;
  background: var(--bg1);
  border-top: 1px solid var(--border);
  padding: 0 12px;
  gap: 10px;
  flex-shrink: 0;
}
.log-tag {
  font-family: var(--cond);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--bg0);
  background: var(--accent);
  padding: 1px 6px;
  flex-shrink: 0;
}
.log-scroll { overflow: hidden; flex: 1; }
#log-msg {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  white-space: nowrap;
  display: inline-block;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 2px; }