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

body {
  background: #000;
  overflow: hidden;
  font-family: 'Courier New', Courier, monospace;
  user-select: none;
}

#canvas {
  display: block;
  width: 100vw;
  height: 100vh;
}

/* ─── HUD Root ──────────────────────────────────────────────── */
#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  color: #00ffaa;
}

/* ─── Top Bar ───────────────────────────────────────────────── */
#hud-top {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 20px;
  white-space: nowrap;
}

.hud-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(0,255,170,0.35);
  border-radius: 20px;
  padding: 5px 14px;
  backdrop-filter: blur(6px);
}

.hud-label {
  font-size: 10px;
  color: rgba(0,255,170,0.6);
  letter-spacing: 1px;
}

.hud-value { font-size: 12px; font-weight: bold; }

.battery-bar {
  width: 48px;
  height: 8px;
  background: rgba(255,255,255,0.15);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(0,255,170,0.3);
}

#battery-fill {
  height: 100%;
  width: 100%;
  background: #00ffaa;
  border-radius: 4px;
  transition: width 0.5s, background-color 0.5s;
}

#hud-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(0,255,170,0.35);
  border-radius: 20px;
  padding: 6px 20px;
  backdrop-filter: blur(6px);
}

.dji-logo {
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 4px;
  color: #fff;
  text-shadow: 0 0 12px rgba(0,255,170,0.9);
}

#flight-mode {
  font-size: 9px;
  letter-spacing: 2px;
  color: #ffcc00;
}

#signal-bars {
  font-size: 14px;
  color: #00ffaa;
  letter-spacing: 2px;
}

/* ─── Left Telemetry ────────────────────────────────────────── */
#hud-left {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#hud-right {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: right;
}

.telem-block {
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(0,255,170,0.25);
  border-radius: 6px;
  padding: 8px 12px;
  backdrop-filter: blur(4px);
  min-width: 110px;
}

.telem-label {
  display: block;
  font-size: 9px;
  color: rgba(0,255,170,0.55);
  letter-spacing: 1px;
  margin-bottom: 3px;
}

.telem-value {
  display: block;
  font-size: 16px;
  font-weight: bold;
  color: #00ffcc;
  text-shadow: 0 0 8px rgba(0,255,200,0.6);
}

/* ─── Bottom Bar ────────────────────────────────────────────── */
#hud-bottom {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: flex-end;
  gap: 30px;
}

/* Attitude indicator (artificial horizon) */
#attitude-indicator {
  width: 80px;
  height: 80px;
  border: 2px solid rgba(0,255,170,0.6);
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #1a6aaa 50%, #8B6914 50%);
}

#horizon-line {
  position: absolute;
  width: 100%;
  height: 2px;
  background: rgba(0,255,170,0.8);
  top: 50%;
  transform: translateY(-50%);
  transition: top 0.1s, transform 0.1s;
}

#drone-cross {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  pointer-events: none;
}

/* Controls hint */
#controls-hint {
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(0,255,170,0.2);
  border-radius: 8px;
  padding: 10px 14px;
  backdrop-filter: blur(4px);
}

.ctrl-row {
  font-size: 11px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 4px;
  line-height: 1.5;
}

kbd {
  background: rgba(0,255,170,0.15);
  border: 1px solid rgba(0,255,170,0.4);
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 10px;
  color: #00ffaa;
  font-family: inherit;
}

/* ─── Camera Badge ──────────────────────────────────────────── */
#cam-badge {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.7);
  border: 1px solid rgba(0,255,170,0.4);
  border-radius: 20px;
  padding: 4px 14px;
  font-family: 'Courier New', monospace;
  font-size: 11px;
  color: #00ffaa;
  letter-spacing: 2px;
  pointer-events: none;
  transition: opacity 0.3s;
}

/* ─── Event Banner ──────────────────────────────────────────── */
#event-banner {
  position: fixed;
  top: 110px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.82);
  border: 2px solid #ff4400;
  border-radius: 12px;
  padding: 10px 28px;
  font-family: 'Courier New', monospace;
  font-size: 18px;
  font-weight: bold;
  color: #ff6622;
  letter-spacing: 2px;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
  text-shadow: 0 0 14px rgba(255,100,0,0.9);
  z-index: 100;
  white-space: nowrap;
}
#event-banner.show { opacity: 1; }

/* ─── FPV Crosshair ─────────────────────────────────────────── */
#crosshair {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 28px;
  color: rgba(0,255,170,0.7);
  pointer-events: none;
  display: none;
  text-shadow: 0 0 10px rgba(0,255,170,0.8);
}

/* ─── Speed Mode Button ─────────────────────────────────────── */
#mode-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: rgba(0,0,0,0.72);
  color: #00ffaa;
  border: 1px solid #00ffaa;
  border-radius: 6px;
  padding: 9px 20px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 12px;
  font-weight: bold;
  letter-spacing: 2px;
  cursor: pointer;
  z-index: 200;
  backdrop-filter: blur(6px);
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
  text-shadow: 0 0 8px rgba(0,255,170,0.6);
  box-shadow: 0 0 10px rgba(0,255,170,0.2);
}
#mode-btn:hover {
  background: rgba(0,255,170,0.12);
  box-shadow: 0 0 18px rgba(0,255,170,0.5);
}
#mode-btn.sport {
  color: #ff8800;
  border-color: #ff8800;
  text-shadow: 0 0 8px rgba(255,136,0,0.6);
  box-shadow: 0 0 10px rgba(255,136,0,0.2);
}
#mode-btn.sport:hover {
  background: rgba(255,136,0,0.12);
  box-shadow: 0 0 18px rgba(255,136,0,0.5);
}

/* ─── Scanning line effect on HUD ───────────────────────────── */
#hud::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
  );
  pointer-events: none;
}