/* Reset & base */
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  font-family: Arial, sans-serif;
  background: #000;
  color: #fff;
}

.hidden { display: none; }

/* Cesium container */
#cesiumContainer {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0; left: 0;
}

/* HUD */
#hud {
  position: absolute;
  top: 10px; left: 10px;
  background: rgba(0,0,0,0.5);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 14px;
  display: flex;
  gap: 10px;
  z-index: 5;
}
#hud strong { font-weight: 700; }

/* Debug overlay */
#debugOverlay {
  position: absolute;
  bottom: 0; left: 0;
  width: 100%;
  max-height: 40%;
  overflow-y: auto;
  background: rgba(0,0,0,0.7);
  color: #0f0;
  font-family: monospace;
  font-size: 12px;
  padding: 6px;
  white-space: pre;
  z-index: 6;
}

/* Login overlay */
#login {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}
#login form {
  background: #111;
  padding: 20px;
  border-radius: 6px;
  text-align: center;
  min-width: 260px;
}
#login h1 {
  margin: 0 0 8px 0;
  font-size: 20px;
  letter-spacing: 1px;
}
#login input {
  padding: 8px;
  margin: 10px 0;
  width: 100%;
  box-sizing: border-box;
  border-radius: 4px;
  border: 1px solid #333;
  background: #0b0b0b;
  color: #fff;
}
#login button {
  padding: 8px 16px;
  background: #0a84ff;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

/* Loading overlay */
#loading {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  background: #111;
  padding: 20px;
  border-radius: 6px;
  z-index: 9;
  color: #fff;
}

/* Controls panel */
#controls {
  position: absolute;
  top: 60px; left: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 5;
}
#controls button {
  padding: 6px 10px;
  background: #222;
  color: #fff;
  border: 1px solid #555;
  border-radius: 4px;
  cursor: pointer;
}
#controls button:hover { background: #2a2a2a; }

/* Joystick */
#joystick {
  position: absolute;
  bottom: 20px; left: 20px;
  width: 100px; height: 100px;
  background: rgba(50,50,50,0.6);
  border-radius: 50%;
  z-index: 5;
  touch-action: none;
  user-select: none;
  box-shadow: inset 0 0 8px rgba(0,0,0,0.6);
}
#stick {
  position: absolute;
  width: 20px; height: 20px;
  background: #0ff;
  border-radius: 50%;
  left: 40px; top: 40px;
  transition: left 0.03s linear, top 0.03s linear;
  box-shadow: 0 2px 6px rgba(0,0,0,0.6);
}

/* Throttle */
#throttle {
  position: absolute;
  bottom: 20px; right: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 5;
}
#throttleSlider {
  width: 30px;
  height: 150px;
  writing-mode: vertical-lr;
  direction: rtl;
  background: linear-gradient(#222, #111);
  border-radius: 6px;
  margin-bottom: 6px;
  -webkit-appearance: none;
  appearance: none;
}
/* Custom thumb for consistent vertical slider visuals */
#throttleSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 28px;
  height: 12px;
  background: #0a84ff;
  border-radius: 3px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.6);
}
#throttleSlider::-moz-range-thumb {
  width: 28px;
  height: 12px;
  background: #0a84ff;
  border: none;
  border-radius: 3px;
}
#throttle .label {
  margin-top: 6px;
  font-size: 12px;
}

/* Camera panel */
#cameraPanel {
  position: absolute;
  top: 10px; right: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 5;
}
#cameraPanel button {
  padding: 6px 10px;
  background: #222;
  color: #fff;
  border: 1px solid #555;
  border-radius: 4px;
  cursor: pointer;
}
#cameraPanel button:hover { background: #2a2a2a; }

/* ATC panel */
#atcPanel {
  position: absolute;
  bottom: 20px; left: 140px;
  width: 320px;
  background: rgba(0,0,0,0.6);
  padding: 8px;
  border-radius: 6px;
  z-index: 5;
  box-sizing: border-box;
}
#atcOutput {
  height: 120px;
  overflow-y: auto;
  background: #0a0a0a;
  padding: 6px;
  margin-bottom: 6px;
  font-size: 13px;
  border: 1px solid rgba(255,255,255,0.05);
}
#atcPanel input[type="text"] {
  width: calc(100% - 74px);
  padding: 6px;
  box-sizing: border-box;
  border-radius: 4px;
  border: 1px solid #333;
  background: #0b0b0b;
  color: #fff;
}
#atcSend {
  padding: 6px 8px;
  margin-left: 6px;
  background: #0a84ff;
  border: none;
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
}

/* Passenger panel */
#passengerPanel {
  position: absolute;
  top: 100px; left: 10px;
  background: rgba(0,0,0,0.8);
  padding: 10px;
  border-radius: 6px;
  width: 220px;
  z-index: 5;
}
#passengerPanel button {
  margin: 4px 0;
  padding: 6px 8px;
  background: #222;
  color: #fff;
  border: 1px solid #555;
  border-radius: 4px;
  cursor: pointer;
}

/* Responsive adjustments */
@media (max-width: 700px) {
  #atcPanel { width: 220px; left: 10px; bottom: 90px; }
  #controls { left: 8px; top: 70px; }
  #joystick { width: 80px; height: 80px; bottom: 14px; left: 12px; }
  #stick { width: 18px; height: 18px; left: 31px; top: 31px; }
  #throttleSlider { height: 120px; }
  #hud { font-size: 12px; flex-wrap: wrap; gap: 6px; }
  #cameraPanel { top: 8px; right: 8px; }
  #passengerPanel { width: 180px; left: 8px; top: 90px; }
}

/* Small tweaks for accessibility and focus states */
button:focus, input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(10,132,255,0.6);
  outline-offset: 2px;
}

/* Visually hidden helper (for screen readers) */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}