/* ============================================================
   MAIN CSS – MilanoImpianti
   Combina Design System con stili specifici del sito
============================================================ */

@import url('design-system.css');
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=Lora:ital,wght@0,400;0,500;1,400&display=swap');

/* ============================================================
   RESPONSIVE BREAKPOINTS (completamento)
============================================================ */
@media (max-width: 1024px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-inner {
    grid-template-columns: 1fr;
  }
  
  .hero-visual {
    display: none;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-6) 0;
  }
  
  .main-nav {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero {
    padding: var(--space-8) 0 var(--space-6);
  }
  
  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .process-steps::after {
    display: none;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .topbar-certs {
    display: none;
  }
  
  .trust-items {
    gap: var(--space-4);
  }
  
  .floating-cta {
    bottom: var(--space-4);
    right: var(--space-4);
    padding: 0.75rem 1.125rem;
    font-size: 0.8rem;
  }
  
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-3);
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
  }
  
  .zone-grid {
    justify-content: center;
  }
}

/* ============================================================
   COMPONENTI SPECIFICI DEL SITO
============================================================ */

/* === TOPBAR === */
.topbar {
  background: var(--blue-900);
  color: rgba(255, 255, 255, 0.75);
  font-family: var(--font-heading);
  font-size: 0.78rem;
  padding: 0.5625rem 0;
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.topbar a {
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--transition-base);
}

.topbar a:hover {
  color: var(--accent);
}

.topbar-certs {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

.cert-pill {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  padding: 0.1875rem 0.625rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--blue-300);
}

/* === HEADER / NAVIGATION === */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--white);
  box-shadow: 0 1px 0 var(--gray-200), var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.125rem 0;
  gap: var(--space-5);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--blue-800);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: var(--blue-600);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--white);
}

.logo-sub {
  font-size: 0.62rem;
  font-weight: 500;
  color: var(--gray-400);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: block;
  margin-top: 1px;
}

.main-nav {
  display: flex;
  gap: var(--space-1);
  align-items: center;
}

.main-nav a {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-600);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.main-nav a:hover {
  color: var(--blue-600);
  background: var(--blue-50);
}

.main-nav a.active {
  color: var(--blue-600);
  font-weight: 600;
}

.nav-cta {
  margin-left: var(--space-2);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 0.3125rem;
  cursor: pointer;
  padding: var(--space-2);
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--blue-800);
  border-radius: 2px;
  transition: var(--transition-base);
}

/* === HERO SECTION === */
.hero {
  background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-700) 60%, var(--blue-600) 100%);
  position: relative;
  overflow: hidden;
  padding: var(--space-10) 0 var(--space-8);
}

.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(26, 111, 207, 0.35) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -120px;
  left: 30%;
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid-lines {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    linear-gradient(rgba(255, 255, 255, 1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 1) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.hero-eyebrow .badge {
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: var(--white);
  margin-bottom: var(--space-5);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-desc {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.08rem;
  margin-bottom: var(--space-6);
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.stat-item {
  background: rgba(255, 255, 255, 0.06);
  padding: var(--space-4) var(--space-3);
  text-align: center;
  backdrop-filter: blur(8px);
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--white);
  display: block;
}

.stat-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font-heading);
  letter-spacing: 0.04em;
}

/* === TRUST BAR === */
.trust-bar {
  background: var(--blue-600);
  padding: 1.375rem 0;
}

.trust-items {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-7);
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
}

.trust-item svg {
  width: 20px;
  height: 20px;
  fill: var(--accent);
  flex-shrink: 0;
}

/* === PROCESS STEPS === */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0;
  position: relative;
}

.process-steps::after {
  content: '';
  position: absolute;
  top: 36px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--gray-200);
  z-index: 0;
}

/* === CERTIFICATION CARDS === */
.cert-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-5);
}

.cert-card {
  background: var(--white);
  border: 2px solid var(--blue-100);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--blue-600);
  color: var(--white);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  align-self: flex-start;
}

/* === ZONE SECTION === */
.zone-section {
  background: var(--blue-900);
  color: var(--white);
}

.zone-section .section-label {
  color: var(--blue-300);
}

.zone-section .section-title {
  color: var(--white);
}

.zone-section .section-sub {
  color: rgba(255, 255, 255, 0.65);
}

.zone-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* === CONTACT SECTION === */
.contact-section {
  background: linear-gradient(135deg, var(--blue-800) 0%, var(--blue-600) 100%);
  position: relative;
  overflow: hidden;
}

.contact-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.06) 0%, transparent 50%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-9);
  align-items: start;
  position: relative;
  z-index: 2;
}

.contact-text h2 {
  color: var(--white);
  margin-bottom: var(--space-4);
}

.contact-text p {
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: var(--space-6);
}

.contact-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-hi {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-heading);
  font-size: 0.88rem;
}

.contact-hi .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.contact-form {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-5);
  box-shadow: var(--shadow-lg);
}

.contact-form h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-5);
  color: var(--blue-800);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-submit {
  width: 100%;
  justify-content: center;
  padding: var(--space-4);
  font-size: var(--text-base);
}

.form-note {
  font-size: 0.75rem;
  color: var(--gray-400);
  text-align: center;
  margin-top: var(--space-3);
  font-family: var(--font-heading);
}

/* === FOOTER === */
.site-footer {
  background: var(--blue-900);
  color: rgba(255, 255, 255, 0.65);
  padding: var(--space-8) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
}

.footer-brand .logo {
  color: var(--white);
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-brand .vat {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.35);
  margin-top: var(--space-3);
}

.footer-col h5 {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-base);
}

.footer-col ul li a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.375rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: 0.78rem;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-base);
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* === FLOATING CTA === */
.floating-cta {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  z-index: var(--z-fixed);
  background: var(--accent);
  color: var(--blue-900);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.875rem 1.375rem;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 32px rgba(245, 166, 35, 0.4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  animation: float 3s ease-in-out infinite;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.floating-cta:hover {
  transform: scale(1.04);
  box-shadow: 0 12px 40px rgba(245, 166, 35, 0.5);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

/* === TOAST === */
.toast {
  position: fixed;
  bottom: 5.625rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--blue-700);
  color: var(--white);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-tooltip);
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* === REVEAL ANIMATIONS === */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* === SECTION UTILITIES === */
.section-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-500);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: var(--space-4);
}

.section-sub {
  font-size: 1.05rem;
  color: var(--gray-600);
  max-width: 640px;
  margin-bottom: var(--space-8);
}

/* === HERO VISUAL COMPONENTS === */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.service-grid-mini {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.mini-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  backdrop-filter: blur(12px);
  transition: var(--transition-base);
}

.mini-card:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-3px);
}

.mini-card .icon {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-2);
  font-size: 1.2rem;
}

.mini-card h4 {
  color: var(--white);
  font-size: 0.85rem;
  font-family: var(--font-heading);
  font-weight: 600;
}

.mini-card p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.75rem;
}

.hero-cert-strip {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 0.875rem 1.125rem;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero-cert-strip span {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

.cert-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}