body {
  margin: 0;
  overflow: hidden;
  font-family: Arial, sans-serif;
  background: #e4f5e9;
}
#menu {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #e4f5e9;
  z-index: 2;
}
#menu h1 {
  color: #236d3c;
  margin-bottom: 2em;
  font-size: 2em;
  text-align: center;
}
#comboContainer {
  margin-bottom: 2em;
}
#panoramaContainer {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  width: 100vw; height: 100vh;
  background: #000;
  display: none;
  z-index: 1;
}
#visualizarBtn, #startButton {
  padding: 1em 2em;
  background: #236d3c;
  color: white;
  border: none;
  font-size: 1.2em;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 1em;
}
#visualizarBtn:active, #startButton:active {
  background: #1b5230;
}
#backBtn {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 10;
  background: rgba(35, 109, 60, 0.9);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.7em 1.2em;
  font-size: 1em;
  cursor: pointer;
}
#backBtn:active {
  background: #1b5230;
}
#startButton {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 20;
  background: rgba(0,0,0,0.8);
}
#imageLoadingSpinner {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background: #e4f5e9;
  z-index: 100;
}
.spinner {
  border: 8px solid #c3e6cb;
  border-top: 8px solid #236d3c;
  border-radius: 50%;
  width: 64px;
  height: 64px;
  animation: spin 1s linear infinite;
  margin-bottom: 1.5em;
}
@keyframes spin {
  0% { transform: rotate(0deg);}
  100% { transform: rotate(360deg);}
}
.loading-text {
  color: #236d3c;
  font-size: 1.2em;
  font-weight: bold;
  text-align: center;
}