/* ==========================================================================
   Utility per Animazioni (Intersection Observer)
   ========================================================================== */

/* State classi iniziali */
.reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

/* Ritardi staggering */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }
.delay-400 { transition-delay: 400ms; }

/* Classe attiva (applicata via JS) */
.is-revealed {
  opacity: 1;
  transform: translate(0, 0);
}

/* ==========================================================================
   Keyframes
   ========================================================================== */
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
  40% { transform: translateY(-10px) translateX(-50%); }
  60% { transform: translateY(-5px) translateX(-50%); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Spinner animato per il bottone di invio */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: var(--color-dark);
  animation: spin 1s linear infinite;
  margin-left: 10px;
}

/* Flex su btn-primary quando sta caricando */
.btn-primary.loading {
  pointer-events: none;
  opacity: 0.8;
}

/* Transizione per card servizi accordion */
.service-full-text {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), margin var(--transition-fast), opacity var(--transition-slow);
  opacity: 0;
}

.service-card.expanded .service-full-text {
  max-height: 500px;
  opacity: 1;
  margin-top: 1rem;
}

.service-card.expanded p.service-desc {
  display: none;
}

/* Form success feedback */
.form-feedback {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 4px;
  background-color: rgba(74, 124, 89, 0.1);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.form-feedback.error {
  background-color: rgba(229, 62, 62, 0.1);
  color: #e53e3e;
  border-color: #e53e3e;
}

/* ==========================================================================
   Prefers Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .reveal-up, .reveal-left, .reveal-right {
    opacity: 1;
    transform: none;
    transition: none;
  }
  
  .parallax-bg {
    background-attachment: scroll;
    height: 100%;
  }
}