/* ===== Variables ===== */
:root {
  --color-bg: #fafafa;
  --color-bg-alt: #ffffff;
  --color-text: #1b1b27;
  --color-text-muted: #5c5c6d;
  --color-accent: #4a6fa5;
  --color-accent-dark: #3a5a8a;
  --color-logo: #6b7c9a;
  --color-border: #e8e8ed;
  --font-sans: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-serif: 'Plus Jakarta Sans', system-ui, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

/* ===== Dark mode ===== */
[data-theme="dark"] {
  --color-bg: #0d0d0d;
  --color-bg-alt: #1a1a1a;
  --color-text: #f0f0f0;
  --color-text-muted: #a0a0a8;
  --color-accent: #6b9bd4;
  --color-accent-dark: #5a8ac4;
  --color-border: #2a2a2e;
}
[data-theme="dark"] .hero {
  background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
}
[data-theme="dark"] .hero-banner::before {
  opacity: 0.12;
}
[data-theme="dark"] .footer {
  background: #0a0a0a;
  border-top: 1px solid var(--color-border);
}
[data-theme="dark"] .logo-img {
  filter: brightness(0) invert(1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-lg);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: block; }
.logo-img {
  height: 72px;
  width: auto;
  display: block;
}
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}
.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
}
.nav-link:hover { color: var(--color-accent); }
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.theme-toggle {
  background: transparent;
  border: 1px solid var(--color-border);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 2px;
}
.theme-toggle:hover { border-color: var(--color-accent); }
.theme-icon { display: inline-block; }
.theme-toggle .theme-moon { display: none; }
.theme-toggle .theme-sun { display: inline; }
[data-theme="dark"] .theme-toggle .theme-moon { display: inline; }
[data-theme="dark"] .theme-toggle .theme-sun { display: none; }
.lang-toggle {
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  display: flex;
  align-items: center;
}
.lang-toggle:hover { border-color: var(--color-accent); }
.lang-display {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.lang-flag-img {
  display: inline-block;
  border-radius: 2px;
  object-fit: cover;
}
.lang-flag-it,
.lang-flag-en,
.lang-flag-fr { display: none; }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}
.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
}

/* ===== Hero ===== */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(80px + var(--space-2xl)) var(--space-lg) var(--space-2xl);
  background: linear-gradient(135deg, #f0f4f8 0%, #e8eef5 100%);
}
.hero-banner {
  position: relative;
  overflow: hidden;
}
.hero-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../Milano_Skyline_green.jpg');
  background-size: cover;
  background-position: center 40%;
  opacity: 0.18;
  z-index: 0;
}
.hero-banner .hero-content {
  position: relative;
  z-index: 1;
}
.hero-content {
  max-width: 800px;
  text-align: center;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin: 0 0 var(--space-md);
  color: var(--color-text);
}
.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xl);
}
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
}
.btn-primary {
  background: var(--color-accent);
  color: white;
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
}

/* ===== Sections ===== */
.section {
  padding: var(--space-2xl) var(--space-lg);
}
.section:nth-child(even) { background: var(--color-bg-alt); }
.container {
  max-width: 1100px;
  margin: 0 auto;
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 500;
  letter-spacing: 0.03em;
  margin: 0 0 var(--space-lg);
  text-align: center;
}
.section-intro {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}
.service-card {
  padding: var(--space-lg);
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.service-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.service-card h3 {
  font-size: 1.1rem;
  margin: 0 0 var(--space-sm);
  color: var(--color-accent);
}
.service-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ===== Team ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
}
.team-card {
  text-align: center;
  padding: var(--space-lg);
}
.team-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0 auto var(--space-sm);
}
.team-card h3 {
  font-size: 1.1rem;
  margin: 0 0 var(--space-xs);
}
.team-card .team-role {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  margin: 0 0 var(--space-xs);
}
.team-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
}
.team-link {
  font-size: 0.9rem;
  color: var(--color-accent);
  text-decoration: none;
}
.team-link:hover { text-decoration: underline; }

/* ===== Carousel ===== */
.carousel {
  position: relative;
  max-width: 900px;
  margin: 0 auto var(--space-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/9;
}
.carousel-track {
  position: relative;
  width: 100%;
  height: 100%;
}
.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s;
}
.carousel-slide.active {
  opacity: 1;
  visibility: visible;
  z-index: 1;
}
.carousel-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.carousel-bg--top {
  background-position: center 28%;
}
.carousel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
}
.carousel-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-lg);
  z-index: 2;
}
.carousel-label {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: white;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border: none;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--color-text);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.carousel-btn:hover {
  background: white;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.carousel-prev { left: var(--space-md); }
.carousel-next { right: var(--space-md); }
.carousel-dots {
  position: absolute;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-sm);
  z-index: 10;
}
.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: background var(--transition);
}
.carousel-dot:hover,
.carousel-dot.active { background: white; }

/* ===== Why Us ===== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
}
.why-item {
  padding: var(--space-md);
  background: var(--color-bg);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.why-item strong {
  color: var(--color-accent);
  font-size: 1rem;
}
.why-item span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ===== Contact ===== */
.contact-intro {
  text-align: center;
  max-width: 560px;
  margin: 0 auto var(--space-xl);
  color: var(--color-text-muted);
  font-size: 1.05rem;
}
.contact-grid {
  max-width: 480px;
  margin: 0 auto;
}
.contact-info {
  padding: var(--space-lg);
  text-align: center;
}
.contact-info p { margin: 0 0 var(--space-sm); }
.contact-info a {
  color: var(--color-accent);
  text-decoration: none;
}
.contact-info a:hover { text-decoration: underline; }
.contact-email-main {
  font-size: 1.1rem;
  margin-bottom: var(--space-md) !important;
}
.contact-email-main a { font-weight: 600; }
.contact-cta {
  margin: var(--space-md) 0 var(--space-xl);
  display: inline-block;
  color: white !important;
}
.contact-cta:hover {
  color: white !important;
}
.contact-leaders {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
}
.contact-leaders-title {
  font-weight: 600;
  margin-bottom: var(--space-sm) !important;
}
.contact-leaders p { margin: 0 0 var(--space-xs); }

/* ===== Footer ===== */
.footer {
  padding: var(--space-xl) var(--space-lg);
  background: var(--color-text);
  color: rgba(255,255,255,0.8);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.footer-logo {
  height: 72px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}
.footer-copy { margin: 0; font-size: 0.9rem; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg-alt);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
  }
  .menu-toggle { display: flex; }
  .contact-grid { grid-template-columns: 1fr; }
  .carousel-btn { width: 40px; height: 40px; font-size: 1rem; }
  .carousel-prev { left: var(--space-sm); }
  .carousel-next { right: var(--space-sm); }
}
@media (max-width: 480px) {
  .hero { min-height: 75vh; padding-top: calc(70px + var(--space-lg)); }
  .section { padding: var(--space-xl) var(--space-md); }
}