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

body {
  margin: 0;
  font-family: Helvetica Now Display, Arial, sans-serif;
  /* font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; */
  background: #f5f5f5; 
  color: #0f0f0f;
  line-height: 1.6;
  overflow-x: hidden;
}

section {
  /* padding: 5rem 10%; */
  position: relative;
  width: 100%;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  background: #f5f5f7;
  font-size: 0.9rem;
  color: #555;
}

/* Scroll To Top - Button */
#toTopBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 99; 
  border: none;
  outline: none;
  background: rgba(85, 85, 85, 0.75); /* glass effect */
  color: white;
  cursor: pointer;
  padding: 12px 18px;
  border-radius: 30px;
  font-size: 18px;
  transition: opacity 0.3s;
  box-shadow: 0 8px 25px rgba(0,0,0,0.15); 
}

#toTopBtn:hover {
  background-color: #555;
}

.unselectable {
  user-select: none;          /* Standard */
  -webkit-user-select: none;  /* Safari/Chrome */
  -moz-user-select: none;     /* Firefox */
  -ms-user-select: none;      /* IE/Edge */
}