/* 
 * UndressAI - Stylesheet
 * Ottimizzato per SEO e design responsive
 */

:root {
  --primary: #8c52ff;
  --secondary: #5ce1e6;
  --dark: #121230;
  --light: #f8f9fa;
  --text: #333344;
  --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Montserrat', 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: var(--text);
  background-color: #fcfcfc;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  background: var(--gradient);
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo svg {
  height: 40px;
  width: 40px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
}

nav a:after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  background: white;
  bottom: -4px;
  left: 0;
  transition: width 0.3s ease;
}

nav a:hover:after {
  width: 100%;
}

.hero {
  padding: 5rem 0;
  position: relative;
  background: var(--light);
}

.hero:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient);
  opacity: 0.05;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--dark);
  line-height: 1.2;
}

.hero-text h1 span {
  color: var(--primary);
}

.hero-text p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.hero-image {
  flex: 1;
  text-align: center;
  position: relative;
}

.hero-image svg {
  max-width: 100%;
  height: auto;
}

.btn {
  display: inline-block;
  background: var(--gradient);
  color: white;
  padding: 1rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(140, 82, 255, 0.4);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(140, 82, 255, 0.6);
}

.features {
  padding: 5rem 0;
  background-color: white;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  color: var(--dark);
  position: relative;
}

.section-title:after {
  content: '';
  position: absolute;
  width: 80px;
  height: 4px;
  background: var(--gradient);
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 2px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.feature-card {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(140, 82, 255, 0.1);
}

.feature-icon {
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--dark);
}

.feature-card p {
  color: var(--text);
}

.how-it-works {
  padding: 5rem 0;
  background: #f9f9ff;
}

.steps {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.step {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.step-number {
  background: var(--gradient);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

.cta {
  padding: 5rem 0;
  background: var(--gradient);
  color: white;
  text-align: center;
}

.cta h2 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
}

.cta p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.cta .btn {
  background: white;
  color: var(--primary);
}

.faq {
  padding: 5rem 0;
}

.faq-item {
  margin-bottom: 1.5rem;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.faq-question {
  background: white;
  padding: 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--dark);
}

.faq-answer {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  background: white;
}

.faq-item.active .faq-answer {
  padding: 1.5rem;
  max-height: 300px;
}

footer {
  padding: 3rem 0;
  background: var(--dark);
  color: white;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-logo {
  flex: 1;
  min-width: 250px;
}

.footer-logo svg {
  width: 50px;
  height: 50px;
  margin-bottom: 1rem;
}

.footer-logo p {
  margin-top: 1rem;
  color: rgba(255,255,255,0.7);
}

.footer-links {
  flex: 1;
  min-width: 250px;
}

.footer-links h4 {
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
  position: relative;
}

.footer-links h4:after {
  content: '';
  position: absolute;
  width: 40px;
  height: 3px;
  background: var(--gradient);
  bottom: -8px;
  left: 0;
  border-radius: 2px;
}

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

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

.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: all 0.3s ease;
}

.footer-links a:hover {
  color: white;
}

.copyright {
  text-align: center;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.5);
}

/* Mobile menu */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Media queries */
@media screen and (max-width: 992px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-text h1 {
    font-size: 3rem;
  }
  
  .step {
    flex-direction: column;
    text-align: center;
  }
}

@media screen and (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  
  nav ul {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--dark);
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
  }
  
  nav ul.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  nav ul li {
    width: 100%;
  }
  
  nav ul li a {
    display: block;
    padding: 1rem 2rem;
    width: 100%;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .footer-content {
    flex-direction: column;
  }
  
  .section-title {
    font-size: 2rem;
  }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate {
  animation: fadeIn 1s ease forwards;
}

/* Accessibilità */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}