body {
  margin: 0;
  overflow: hidden;
  font-family: sans-serif;

}

/* Camera full screen */
#camera {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
    background: #444;
}

/* UI overlay */
.ui {
  position: fixed;
  top: 10px;
  left: 10px;
  color: white;
  z-index: 10;
}

button {
  padding: 10px;
  margin-bottom: 10px;
  font-size: 16px;
}

/* Marker */
#marker {
  position: fixed;
  top: 50%;
  left: 50%;
  font-size: 40px;
  transform: translate(-50%, -50%);
  z-index: 5;
}
/* Marker wrapper (position only) */
#markerWrapper {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 5;
}

/* Marker container */
#marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: translate(-50%, -50%);
  color: white;
}

/* Pin icon */
.pin {
  font-size: 36px;
}

/* Distance label */
#markerLabel {
  font-size: 24px;
  margin-top: -6px;
  padding: 2px 6px;
  background: rgba(0,0,0,0.6);
  border-radius: 6px;
  white-space: pre-line;   /* 👈 IMPORTANT for \n */
  text-align: center;
}

/* FOV popup */
#settingsPanel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.9);
  padding: 20px;
  border-radius: 10px;
  color: white;
  z-index: 20;
}

.hidden {
  display: none;
}

/* Open button */
#openFovBtn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 20;
  font-size: 20px;
  padding: 10px;
  border-radius: 50%;
}

/* Marker */
#markerWrapper {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 5;
}

#marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: translate(-50%, -50%);
  color: white;
}

.pin {
  font-size: 36px;
}



#horizon {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 200vw;              /* long line */
  height: 2px;
  background: yellow;

  transform: translate(-50%, -50%);
  transform-origin: center;

  z-index: 4;
  pointer-events: none;
}

.info {
  background: rgba(0, 0, 0, 0.2);  /* transparent dark */
  color: white;                    /* high contrast text */
  padding: 10px;
  border-radius: 10px;

  backdrop-filter: blur(6px);      /* 🔥 nice glass effect (optional) */
  -webkit-backdrop-filter: blur(6px);

  font-size: 14px;
  line-height: 1.4;
}

.fov-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.fov-row label {
  width: 120px;   /* 🔥 fixed width = perfect alignment */
}

.fov-row input {
  width: 80px;
}

#crosshair {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  transform: translate(-50%, -50%);
  z-index: 9999;
  pointer-events: none;
}

/* horizontal */
#crosshair::before {
  content: "";
  position: absolute;

  top: 50%;
  left: 0;

  width: 100%;
  height: 2px;

  transform: translateY(-50%);

  background: linear-gradient(
    to right,
    white 0%,
    white 40%,
    transparent 40%,
    transparent 60%,
    white 60%,
    white 100%
  );
}

/* vertical */
#crosshair::after {
  content: "";
  position: absolute;

  left: 50%;
  top: 0;

  width: 2px;
  height: 100%;

  transform: translateX(-50%);

  background: linear-gradient(
    to bottom,
    white 0%,
    white 40%,
    transparent 40%,
    transparent 60%,
    white 60%,
    white 100%
  );
}
/* รวม style ปุ่มให้เหมือนกัน */
button,
#createMarkerBtn {
  display: inline-block;
  padding: 10px;
  margin-bottom: 10px;
  font-size: 16px;

  border: none;
  border-radius: 4px;

  background: #ddd;
  color: black;

  text-decoration: none;
  cursor: pointer;
}

/* hover เหมือนกัน */
button:hover,
#createMarkerBtn:hover {
  background: #ccc;
}