html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  	display: flex;
  	justify-content: center;
  	align-items: flex-start;
	
	margin: 0;
    padding: 0;
    height: 100%;
}

#categoryTitle, .title, .stepIndicator {
  font-size: 3dvh;
  font-weight: bold;
  color: #00796b;
  transition: opacity 0.3s ease, transform 0.3s ease;
}



.page {
  display: grid;
  height: calc(var(--vh) * 1.0);                
  grid-template-rows: 5% 50% 5% 25% 7% 5% 3%;
}

.page > div {
  display: flex;
  justify-content: center;
  align-items: center;
}

.preview img {
  position: absolute;
  height: calc(var(--vh) * 0.5);  
  transition: opacity 0.5s ease, transform 0.3s ease;
}

.options {
  display: grid;
  flex-wrap: wrap;
  justify-content: center;
  gap: calc(var(--vh) * 0.01); 
}

.options img {
  width: calc(var(--vh) * 0.09); 
  height: calc(var(--vh) * 0.09); 
  border-radius: calc(var(--vh) * 0.02); 
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  transform: scale(1);
}

.options img.selected {
  border-color: #00796b;
  transform: scale(1.1);
}


button {
  padding: calc(var(--vh) * 0.01)  calc(var(--vh) * 0.01);
  margin: calc(var(--vh) * 0.01);
  border: none;
  border-radius: 12px;
  font-weight: bold;
  cursor: pointer;
  font-size: 1.4rem;
  transition: transform 0.2s ease, background 0.3s ease;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
}

#backBtn {
  background: #ff8a65;
  color: #fff;
}

#backBtn:disabled {
  background: #ffc2a0;
  cursor: default;
}

#nextBtn {
  background: #4db6ac;
  color: #fff;
  transform: scale(1.2);
}

#nextBtn.sendButton {
  transform: scale(2);
  bottom: calc(var(--vh) * 0.24);
  position: absolute;
}