/* ============================================
   STILI PRINCIPALI
   ============================================ */

@import url('variables.css');

/* Reset e Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

/* Header / Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(15, 32, 58, 0.9);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  transform: translateY(-100%);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  z-index: 900;
}

/* Assicura che il menu toggle non venga nascosto dalla header - SOPRA l'overlay */
.site-header .menu-toggle {
  z-index: 1005 !important;
  position: fixed !important;
  top: 1rem !important;
  right: var(--spacing-md) !important;
}

/* Quando il menu è aperto, il pulsante X deve essere sempre visibile - SOPRA l'overlay */
body.menu-open .site-header .menu-toggle,
body.menu-open .site-header .menu-toggle.active {
  display: flex !important;
  visibility: visible !important;
  opacity: 1 !important;
  z-index: 1005 !important;
  position: fixed !important;
  top: 1rem !important;
  right: var(--spacing-md) !important;
}

.site-header.visible {
  transform: translateY(0);
  opacity: 1;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  min-height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text-white);
}

.logo-image {
  height: 75px;
  width: auto;
  max-width: 350px;
  object-fit: contain;
  transition: transform var(--transition-normal);
}

.logo:hover .logo-image {
  transform: scale(1.05);
}

/* Manteniamo le classi per retrocompatibilità se necessario */
.logo-icon {
  display: none;
}

.logo-text {
  display: none;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-text-white);
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  padding-bottom: 0.25rem;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

/* Voce di menu attiva (sezione visibile) */
.main-nav a.active {
  color: var(--color-accent);
}

.main-nav a.active::after {
  transform: scaleX(1);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--color-text-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-white);
}

/* Scroll to Top Button */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  color: var(--color-text-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  z-index: 1000;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  visibility: hidden;
}

.scroll-to-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.scroll-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  visibility: visible;
  animation: scrollPulse 1.4s ease infinite;
}

@keyframes scrollPulse {
  0% { box-shadow: var(--shadow-lg); }
  50% { box-shadow: 0 15px 25px rgba(30, 58, 95, 0.35); }
  100% { box-shadow: var(--shadow-lg); }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* Responsive */
@media (max-width: 768px) {
  .header-inner {
    padding: 1rem 0;
    min-height: 70px;
  }
  
  .logo-image {
    height: 55px;
    max-width: 250px;
  }

  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.9rem;
  }
}