/* Variables & Base Styles */
:root {
  /* Couleurs principales */
  --primary-color: #1E3A8A;
  --primary-light: #3B82F6;
  --primary-dark: #1E40AF;
  --secondary-color: #7E22CE;
  --secondary-light: #A855F7;
  --accent-color: #F97316;
  --accent-light: #FB923C;
  
  /* Grays */
  --dark: #0F172A;
  --dark-gray: #334155;
  --medium-gray: #64748B;
  --light-gray: #CBD5E1;
  --lightest-gray: #F1F5F9;
  --white: #FFFFFF;
  
  /* Status colors */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  
  /* Typography */
  --font-primary: 'Poppins', sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Layout */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-index layers */
  --z-background: -10;
  --z-default: 1;
  --z-header: 10;
  --z-dropdown: 20;
  --z-modal: 30;
  --z-toast: 40;
  --z-tooltip: 50;
}

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

html {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  line-height: 1.5;
  color: var(--dark);
  background-color: var(--white);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  font-family: inherit;
}

/* Container */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

.title-large {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-lg);
}

.title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

.subtitle {
  font-size: var(--font-size-xl);
  color: var(--dark-gray);
  margin-bottom: var(--spacing-xl);
}

.description {
  font-size: var(--font-size-lg);
  color: var(--medium-gray);
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
}

.accent {
  color: var(--accent-color);
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-text {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-normal);
  font-size: var(--font-size-md);
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white) !important;
  border: 2px solid var(--primary-color);
}

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

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

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

.btn-text {
  color: var(--primary-color);
  padding: var(--spacing-sm) 0;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-text::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-normal);
}

.btn-text:hover::after {
  width: 100%;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  transition: all var(--transition-normal);
  padding: var(--spacing-md) 0;
  background-color: transparent;
}

header.scrolled {
  background-color: var(--white);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-sm) 0;
}

.navbar {
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

.logo-text {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo-text .accent {
  color: var(--accent-color);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  color: var(--dark);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-normal);
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
}

.bar {
  height: 3px;
  width: 100%;
  background-color: var(--dark);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-content {
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.hero-image {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  pointer-events: none;
}

.parallax-image {
  transition: transform var(--transition-slow);
}

/* Concept Section */
.concept {
  padding: var(--spacing-3xl) 0;
  background-color: var(--white);
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

.concept-card {
  background-color: var(--lightest-gray);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.concept-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.icon-container {
  width: 70px;
  height: 70px;
  background-color: var(--primary-light);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  color: var(--white);
  font-size: var(--font-size-2xl);
}

.concept-card h3 {
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.concept-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  margin-top: var(--spacing-3xl);
}

.concept-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.concept-text h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
}

.concept-text p {
  margin-bottom: var(--spacing-lg);
  color: var(--dark-gray);
}



.features .title,
.features .description {
  color: var(--white);
}

.features .accent {
  color: var(--accent-light);
}

.wave-top,
.wave-bottom {
  position: absolute;
  width: 100%;
  pointer-events: none;
}

.wave-top {
  top: -1px;
}

.wave-bottom {
  bottom: -1px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  padding: var(--spacing-2xl) 0;
}

.feature-card {
  background-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  box-shadow: var(--shadow-md);
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  background-color: rgba(255, 255, 255, 0.15);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background-color: var(--accent-color);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-xl);
}

.feature-card h3 {
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-lg);
}

/* Pricing Section */
.pricing {
  padding: var(--spacing-3xl) 0;
  background-color: var(--lightest-gray);
  position: relative;
  z-index: 1;
}

.pricing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.toggle-label {
  font-weight: 500;
}

.discount {
  background-color: var(--accent-color);
  color: var(--white);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  margin-left: 5px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 30px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--light-gray);
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
}

input:checked + .slider {
  background-color: var(--primary-color);
}

input:focus + .slider {
  box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
  transform: translateX(30px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.pricing-card {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border: 2px solid var(--primary-color);
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-10px);
}

.pricing-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: var(--primary-color);
  color: var(--white);
  padding: 5px 15px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.pricing-header {
  padding: var(--spacing-xl);
  background-color: var(--lightest-gray);
  text-align: center;
}

.pricing-header h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

.price {
  margin-bottom: var(--spacing-md);
}

.amount {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--primary-color);
}

.annual {
  display: none;
}

.period {
  font-size: var(--font-size-md);
  color: var(--medium-gray);
}

.pricing-features {
  padding: var(--spacing-xl);
}

.pricing-features ul li {
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-features i {
  color: var(--success);
}

.pricing-action {
  padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-xl);
  text-align: center;
}

/* Testimonials Section */
.testimonials {
  padding: var(--spacing-3xl) 0;
  position: relative;
  z-index: 1;
}

.testimonials-slider {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
}

.testimonial-card {
  display: none;
}

.testimonial-card.active {
  display: block;
  animation: fadeIn var(--transition-normal);
}

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

.testimonial-content {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
}

.testimonial-quote {
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.testimonial-quote i {
  font-size: var(--font-size-3xl);
  color: var(--light-gray);
  position: absolute;
  top: -15px;
  left: -10px;
  z-index: var(--z-background);
}

.testimonial-quote p {
  position: relative;
  z-index: var(--z-default);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.testimonial-author img {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.author-info h4 {
  font-size: var(--font-size-md);
  margin-bottom: 4px;
}

.author-info p {
  font-size: var(--font-size-sm);
  color: var(--medium-gray);
}

.testimonial-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--spacing-xl);
  gap: var(--spacing-lg);
}

.testimonial-btn {
  background-color: transparent;
  border: 1px solid var(--primary-color);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  transition: all var(--transition-fast);
}

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

.testimonial-dots {
  display: flex;
  gap: var(--spacing-sm);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--light-gray);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.dot.active {
  background-color: var(--primary-color);
  width: 25px;
}

/* Contact Section */
.contact {
  padding: var(--spacing-3xl) 0;
  background-color: var(--primary-color);
  color: var(--white);
  position: relative;
  margin-top: var(--spacing-3xl);
}

.contact .title,
.contact .description {
  color: var(--white);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

.contact-form {
  background-color: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--light-gray);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-md);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-light);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.info-icon {
  width: 50px;
  height: 50px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
}

.info-content h4 {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-lg);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.social-link:hover {
  background-color: var(--white);
  color: var(--primary-color);
  transform: translateY(-3px);
}

/* Footer */
.footer {
  background-color: var(--dark);
  color: var(--white);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-logo {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-logo p {
  font-size: var(--font-size-md);
  margin-top: var(--spacing-md);
  color: var(--light-gray);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.footer-column h4 {
  margin-bottom: var(--spacing-lg);
  color: var(--white);
}

.footer-column ul li {
  margin-bottom: var(--spacing-md);
}

.footer-column ul li a {
  color: var(--light-gray);
  transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
  color: var(--white);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--light-gray);
  font-size: var(--font-size-sm);
}

.footer-language select {
  background-color: transparent;
  border: 1px solid var(--light-gray);
  color: var(--light-gray);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  cursor: pointer;
}

.footer-language select:focus {
  outline: none;
}

/* Scroll to Top */
.scroll-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: var(--z-tooltip);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-to-top:hover {
  background-color: var(--primary-dark);
}

/* Animation Classes */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

.slide-in {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.slide-in.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Responsive Styles */
@media (max-width: 1200px) {
  :root {
    --font-size-4xl: 2.5rem;
    --font-size-3xl: 1.75rem;
  }
  
  .hero {
    height: auto;
    padding: 120px 0 60px;
  }
  
  .pricing-card.featured {
    transform: scale(1.03);
  }
  
  .pricing-card.featured:hover {
    transform: scale(1.03) translateY(-10px);
  }
}

@media (max-width: 992px) {
  .hero .container,
  .concept-details,
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .hero-content {
    max-width: 100%;
    text-align: center;
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .concept-image {
    order: -1;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    --spacing-3xl: 3rem;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 80px;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: calc(100vh - 80px);
    background-color: var(--white);
    flex-direction: column;
    gap: 0;
    box-shadow: var(--shadow-lg);
    transition: right var(--transition-normal);
    padding: var(--spacing-md);
    z-index: var(--z-dropdown);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-menu li {
    width: 100%;
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-md);
    width: 100%;
  }
  
  .pricing-grid {
    gap: var(--spacing-xl);
  }
  
  .pricing-card.featured {
    transform: scale(1);
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-10px);
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

@media (max-width: 576px) {
  :root {
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --spacing-2xl: 2rem;
  }
  
  .hero-cta {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .btn-primary, .btn-secondary {
    width: 100%;
    text-align: center;
  }
  
  .concept-grid,
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

/* Toggle Annual/Monthly pricing */
body.annual-billing .pricing-card .monthly {
  display: none;
}

body.annual-billing .pricing-card .annual {
  display: inline;
}