@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;500;700&display=swap');

body {
  margin: 0;
  background-color: #000; /* sfondo iniziale nero */
  font-family: 'Poppins', sans-serif;
  overflow: hidden;
  transition: background-color 2s ease;
}

#intro {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  z-index: 10;
}

.title {
  font-size: 4rem;
  font-weight: 500;
  color: #fff;
  -webkit-text-stroke: 0.5px #000; /* bordo leggerissimo */
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1.3s cubic-bezier(0.19,1,0.22,1) forwards;
}

.subtitle {
  font-size: 3.8rem;
  font-weight: 700;
  opacity: 0;
  transform: translateY(40px);
  background: linear-gradient(90deg, red, orange, yellow, green, blue, indigo, violet);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 400% 100%;
  animation:
    fadeSlide 1.5s cubic-bezier(0.19,1,0.22,1) 1s forwards,
    rainbow 8s linear infinite;
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeSlide {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes rainbow {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

#line {
  position: absolute;
  top: 2cm;
  left: 50%;
  width: 0%;
  height: 1px;
  background: #ccc;
  z-index: 5;
  transform: translateX(-50%);
  transition: width 1.2s ease;
}

.move-title {
  font-size: 2.6rem; 
  color: #000;
  -webkit-text-stroke: 0;
  position: absolute;
  top: 2cm;
  left: 40px;
  transition: all 1.5s cubic-bezier(0.77,0,0.175,1);
}

.move-subtitle {
  font-size: 3rem;
  position: absolute;
  top: 2cm;
  left: 50%;
  transform: translateX(-50%);
  animation: none !important;
  background: linear-gradient(90deg, red, orange, yellow, green, blue, indigo, violet);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: all 1.5s cubic-bezier(0.77,0,0.175,1);
}