/* ==========================================================================
   UVAT - Sistema di Sanificazione Aria con Tecnologia UV-C
   Core Stylesheet (Pure Vanilla CSS)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design System & CSS Variables
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --clr-bg-light: #f8fafc;
  --clr-bg-dark: #0f172a;
  --clr-bg-card-light: #ffffff;
  --clr-bg-card-dark: #1e293b;
  
  --clr-primary: #7c3aed;       /* Violet 600 */
  --clr-primary-hover: #6d28d9; /* Violet 700 */
  --clr-primary-light: #c084fc; /* Violet 400 */
  
  --clr-secondary: #06b6d4;     /* Cyan 500 */
  --clr-secondary-hover: #0891b2;
  
  --clr-text-dark: #0f172a;
  --clr-text-muted-dark: #475569;
  --clr-text-light: #f8fafc;
  --clr-text-muted-light: #94a3b8;
  
  --clr-border-light: #e2e8f0;
  --clr-border-dark: #334155;
  
  /* Fonts */
  --font-heading: 'Poppins', system-ui, -apple-system, sans-serif;
  --font-body: 'Open Sans', system-ui, -apple-system, sans-serif;
  
  /* Layout */
  --container-max-width: 1200px;
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  
  /* Transitions */
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 15px rgba(124, 58, 237, 0.4);
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--clr-bg-light);
  color: var(--clr-text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--clr-text-dark);
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

iframe {
  border: none;
}

/* --------------------------------------------------------------------------
   3. Main Layout Containers
   -------------------------------------------------------------------------- */
.container {
  width: 90%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-dark {
  background-color: var(--clr-bg-dark);
  color: var(--clr-text-light);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--clr-text-light);
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 25%;
  width: 50%;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-secondary));
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   4. Header & Navigation (Glassmorphism)
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border-light);
  transition: var(--transition-normal);
}

.header.scrolled {
  padding: 0.5rem 0;
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.95);
}

.header-dark {
  background-color: rgba(15, 23, 42, 0.8);
  border-bottom: 1px solid var(--clr-border-dark);
}

.header-dark.scrolled {
  background-color: rgba(15, 23, 42, 0.95);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo-wrapper {
  display: flex;
  align-items: center;
}

.logo {
  height: 50px;
  width: auto;
  transition: var(--transition-normal);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2.2rem;
  align-items: center;
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--clr-text-muted-dark);
  position: relative;
  padding: 0.5rem 0;
}

.header-dark .nav-link {
  color: var(--clr-text-muted-light);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--clr-primary);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: var(--clr-primary);
}

.header-dark .nav-link:hover {
  color: var(--clr-primary-light);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--clr-primary);
  font-weight: 700;
}

.header-dark .nav-link.active {
  color: var(--clr-text-light);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  transition: var(--transition-normal);
  background-color: var(--clr-text-dark);
}

.header-dark .bar {
  background-color: var(--clr-text-light);
}

/* --------------------------------------------------------------------------
   5. Buttons & CTA Elements
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 2rem;
  font-family: var(--font-heading);
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-hover));
  color: var(--clr-text-light);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

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

.btn-secondary:hover {
  background-color: var(--clr-primary);
  color: var(--clr-text-light);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--clr-secondary), var(--clr-secondary-hover));
  color: var(--clr-text-light);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.4);
}

/* --------------------------------------------------------------------------
   6. Hero Section (Homepage)
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  background-color: var(--clr-bg-dark);
  color: var(--clr-text-light);
  padding: 10rem 0 7rem 0;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -50%;
  left: -20%;
  width: 80%;
  height: 150%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
  z-index: 1;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.hero-title span {
  background: linear-gradient(90deg, #c084fc, #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--clr-text-muted-light);
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.hero-ctas {
  display: flex;
  gap: 1.5rem;
}

.hero-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-image {
  max-width: 100%;
  border-radius: var(--border-radius-md);
  box-shadow: 0 25px 50px -12px rgba(124, 58, 237, 0.25);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
  100% { transform: translateY(0px); }
}

/* --------------------------------------------------------------------------
   7. Modelli Grid & Technical Specs
   -------------------------------------------------------------------------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.card-modello {
  background-color: var(--clr-bg-card-light);
  border-radius: var(--border-radius-md);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--clr-border-light);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.card-modello:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-primary-light);
}

.card-modello-title {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: var(--clr-primary);
  border-bottom: 2px solid var(--clr-border-light);
  padding-bottom: 0.5rem;
}

.spec-list {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.spec-item {
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--clr-border-light);
  display: flex;
  justify-content: space-between;
}

.spec-item:last-child {
  border-bottom: none;
}

.spec-label {
  font-weight: 600;
  color: var(--clr-text-muted-dark);
}

.spec-value {
  color: var(--clr-text-dark);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   8. Feature Highlights & Content Panels
   -------------------------------------------------------------------------- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
  margin-bottom: 6rem;
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-row.reverse {
  direction: rtl;
}

.feature-row.reverse > * {
  direction: ltr;
}

.feature-content h3 {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.feature-content p {
  color: var(--clr-text-muted-dark);
  margin-bottom: 1.5rem;
}

.feature-img-wrapper {
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.feature-img-wrapper img {
  width: 100%;
  height: auto;
  transition: var(--transition-normal);
}

.feature-img-wrapper:hover img {
  transform: scale(1.03);
}

/* Quote banner */
.quote-banner {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
  padding: 4rem 2rem;
  border-left: 6px solid var(--clr-primary);
  border-radius: var(--border-radius-sm);
  margin: 3rem 0;
}

.quote-text {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-style: italic;
  font-weight: 600;
  line-height: 1.5;
  color: var(--clr-text-dark);
  margin-bottom: 1rem;
}

.quote-author {
  font-weight: 700;
  color: var(--clr-primary);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 1px;
}

/* --------------------------------------------------------------------------
   9. Installazioni & Case Studies Showcases
   -------------------------------------------------------------------------- */
.installazioni-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2.5rem;
}

.card-installazione {
  background-color: var(--clr-bg-card-light);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--clr-border-light);
  transition: var(--transition-normal);
}

.card-installazione:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.card-inst-img-wrapper {
  height: 220px;
  overflow: hidden;
  position: relative;
}

.card-inst-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-normal);
}

.card-installazione:hover .card-inst-img-wrapper img {
  transform: scale(1.05);
}

.card-inst-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: var(--clr-primary);
  color: var(--clr-text-light);
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-inst-content {
  padding: 1.5rem;
}

.card-inst-title {
  font-size: 1.4rem;
  margin-bottom: 0.8rem;
}

.card-inst-desc {
  color: var(--clr-text-muted-dark);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Detail Case Study Page */
.case-study-hero {
  padding: 12rem 0 5rem 0;
  background-color: var(--clr-bg-dark);
  color: var(--clr-text-light);
  text-align: center;
}

.case-study-hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--clr-text-light);
}

.case-study-meta {
  display: flex;
  justify-content: center;
  gap: 2rem;
  color: var(--clr-text-muted-light);
  font-size: 1rem;
}

.case-study-content {
  padding: 5rem 0;
}

.case-study-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 4rem;
}

.case-study-body p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--clr-text-dark);
}

.case-study-sidebar {
  background-color: var(--clr-bg-card-light);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  align-self: start;
}

.case-study-sidebar h3 {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--clr-border-light);
  padding-bottom: 0.5rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}

.gallery-item {
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition-normal);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

/* --------------------------------------------------------------------------
   10. Team Grid (Chi Siamo)
   -------------------------------------------------------------------------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  margin-top: 4rem;
}

.card-team {
  background-color: var(--clr-bg-card-light);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--clr-border-light);
  text-align: center;
  transition: var(--transition-normal);
}

.card-team:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-primary-light);
}

.team-img-wrapper {
  overflow: hidden;
  background-color: #f1f5f9;
}

.team-img-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition-normal);
}

.card-team:hover .team-img-wrapper img {
  transform: scale(1.03);
}

.team-info {
  padding: 2rem;
}

.team-name {
  font-size: 1.5rem;
  margin-bottom: 0.4rem;
}

.team-role {
  font-weight: 600;
  color: var(--clr-primary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
}

.team-desc {
  font-size: 0.95rem;
  color: var(--clr-text-muted-dark);
}

/* --------------------------------------------------------------------------
   11. Videos & Iframe Embeds
   -------------------------------------------------------------------------- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
}

.video-card {
  background-color: var(--clr-bg-card-light);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--clr-border-light);
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-info {
  padding: 1.5rem;
}

.video-info h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.video-info p {
  color: var(--clr-text-muted-dark);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   12. Contact Form & Footer Section
   -------------------------------------------------------------------------- */
.contact-section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-info-block h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.contact-info-list {
  list-style: none;
  margin-bottom: 3rem;
}

.contact-info-item {
  display: flex;
  align-items: start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.contact-info-item svg {
  color: var(--clr-primary);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

/* Contact Form UI */
.contact-form {
  background-color: var(--clr-bg-card-light);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--border-radius-md);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--clr-text-dark);
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--clr-border-light);
  background-color: var(--clr-bg-light);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--clr-primary);
  background-color: #ffffff;
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* Map Wrap */
.map-container {
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--clr-border-light);
  margin-top: 2rem;
}

.map-container iframe {
  width: 100%;
  height: 350px;
  display: block;
}

/* Footer styling */
.footer {
  background-color: var(--clr-bg-dark);
  color: var(--clr-text-muted-light);
  padding: 5rem 0 2rem 0;
  border-top: 1px solid var(--clr-border-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-logo {
  height: 60px;
  width: auto;
  margin-bottom: 1.5rem;
  filter: brightness(0) invert(1);
}

.footer-about p {
  font-size: 0.95rem;
  max-width: 320px;
}

.footer-links-title {
  color: var(--clr-text-light);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.footer-links-list {
  list-style: none;
}

.footer-links-item {
  margin-bottom: 0.8rem;
}

.footer-links-link {
  font-size: 0.95rem;
}

.footer-links-link:hover {
  color: var(--clr-primary-light);
  padding-left: 5px;
}

.footer-contact-title {
  color: var(--clr-text-light);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.footer-contact-text {
  font-size: 0.95rem;
  line-height: 1.8;
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid var(--clr-border-dark);
  padding-top: 2rem;
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   13. Responsive Styles & Mobile Navigation
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    gap: 2rem;
  }
  .hero-title {
    font-size: 3rem;
  }
  .grid-3, .team-grid {
    gap: 1.5rem;
  }
  .feature-row {
    gap: 3rem;
  }
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-ctas {
    justify-content: center;
  }
  .grid-3, .team-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }
  .video-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
  .feature-row, .feature-row.reverse {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  .feature-row.reverse {
    direction: ltr;
  }
  .contact-section-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 4rem 0;
  }
  .section-title {
    font-size: 2rem;
  }
  
  /* Mobile Menu Toggle classes */
  .hamburger {
    display: block;
    z-index: 1001;
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 0;
    background-color: var(--clr-bg-dark);
    width: 100%;
    height: 100vh;
    transition: 0.3s;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-list {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
  
  .nav-link {
    font-size: 1.5rem;
    color: var(--clr-text-light) !important;
  }
  
  .case-study-grid {
    grid-template-columns: 1fr;
  }
  .case-study-sidebar {
    order: -1;
  }
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}