:root {
  /* Primary Color Palette - Tetrad Scheme */
  --primary: #4a6ee0;
  --primary-dark: #3557b8;
  --primary-light: #7993e9;
  --secondary: #e04a9c;
  --secondary-dark: #b83577;
  --secondary-light: #e97bb7;
  --accent1: #e0af4a;
  --accent1-dark: #b88c35;
  --accent1-light: #e9c77b;
  --accent2: #4ae0af;
  --accent2-dark: #35b88c;
  --accent2-light: #7be9c7;
  
  /* Neutral Colors */
  --white: #ffffff;
  --light-gray: #f8f9fa;
  --medium-gray: #dee2e6;
  --dark-gray: #495057;
  --black: #212529;
  
  /* Font Families */
  --heading-font: 'Roboto', sans-serif;
  --body-font: 'Lato', sans-serif;
  
  /* Typography Sizes */
  --h1-size: 3.5rem;
  --h2-size: 2.5rem;
  --h3-size: 2rem;
  --h4-size: 1.5rem;
  --h5-size: 1.25rem;
  --base-size: 1rem;
  --small-size: 0.875rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-circle: 50%;
  
  /* Shadows */
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 1rem 2rem rgba(0, 0, 0, 0.15);
  --shadow-inset: inset 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-indices */
  --z-negative: -1;
  --z-normal: 1;
  --z-tooltip: 10;
  --z-fixed: 100;
  --z-modal: 1000;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--body-font);
  color: var(--black);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--h1-size);
}

h2 {
  font-size: var(--h2-size);
}

h3 {
  font-size: var(--h3-size);
}

h4 {
  font-size: var(--h4-size);
}

h5 {
  font-size: var(--h5-size);
}

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

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

a:hover {
  color: var(--primary-dark);
}

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

section {
  padding: var(--spacing-lg) 0;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.text-center {
  text-align: center;
}

.text-white {
  color: var(--white);
}

.bg-light {
  background-color: var(--light-gray);
}

.bg-primary {
  background-color: var(--primary);
}

.bg-secondary {
  background-color: var(--secondary);
}

.bg-accent1 {
  background-color: var(--accent1);
}

.bg-accent2 {
  background-color: var(--accent2);
}

.shadow-sm {
  box-shadow: var(--shadow-sm);
}

.shadow-md {
  box-shadow: var(--shadow-md);
}

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

.rounded-4 {
  border-radius: var(--radius-lg);
}

.rounded-pill {
  border-radius: 50rem;
}

.transform-hover {
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

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

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5));
  z-index: 1 !important;
}

/* ==========================================================================
   Button Styles (Global)
   ========================================================================== */

.btn,
button,
input[type="submit"] {
  display: inline-block;
  font-weight: 500;
  text-align: center;
  vertical-align: middle;
  user-select: none;
  padding: 0.5rem 1.5rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  z-index: 1;
  border: none;
  cursor: pointer;
}

.btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.1);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-medium);
  z-index: -1;
}

.btn:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.btn:active {
  transform: scale(0.98);
}

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

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

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

.btn-secondary:hover {
  background-color: var(--secondary-dark);
  color: var(--white);
}

.btn-accent1 {
  background-color: var(--accent1);
  color: var(--white);
}

.btn-accent1:hover {
  background-color: var(--accent1-dark);
  color: var(--white);
}

.btn-accent2 {
  background-color: var(--accent2);
  color: var(--white);
}

.btn-accent2:hover {
  background-color: var(--accent2-dark);
  color: var(--white);
}

.btn-outline-light {
  color: var(--white);
  border: 2px solid var(--white);
  background-color: transparent;
}

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

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

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

.btn-lg {
  padding: 0.75rem 2rem;
  font-size: 1.25rem;
}

.btn-sm {
  padding: 0.25rem 1rem;
  font-size: 0.875rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

header {
  box-shadow: var(--shadow-sm);
}

.navbar {
  padding: 1rem 0;
}

.navbar-brand img {
  transition: transform var(--transition-fast);
}

.navbar-brand:hover img {
  transform: scale(1.05);
}

.nav-link {
  position: relative;
  padding: 0.5rem 1rem;
  margin: 0 0.25rem;
  color: var(--dark-gray);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary);
  transform: scaleX(0);
  transition: transform var(--transition-medium);
}

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

.nav-link:hover::after {
  transform: scaleX(1);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

#hero {
  position: relative;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--white);
  overflow: hidden;
}

#hero .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5));
}

#hero .container {
  position: relative;
  z-index: 2;
}

#hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s;
}

#hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  animation: fadeInUp 1s 0.3s forwards;
  opacity: 0;
}

#hero .btn {
  animation: fadeInUp 1s 0.6s forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   Features Section
   ========================================================================== */

#features .card {
  height: 100%;
  border: none;
  overflow: hidden;
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

#features .card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

#features .card-image {
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

#features .card-image img {
  transition: transform var(--transition-slow);
  width: 100%;
  height: 250px;
  object-fit: cover;
}

#features .card:hover .card-image img {
  transform: scale(1.05);
}

#features .icon-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 70px;
  height: 70px;
  margin: 0 auto;
  background-color: var(--primary-light);
  border-radius: var(--radius-circle);
  color: var(--white);
  transition: transform var(--transition-medium);
}

#features .card:hover .icon-wrapper {
  transform: rotateY(180deg);
}

#features .animated-icon {
  font-size: 2rem;
  transition: transform var(--transition-medium);
}

#features .card:hover .animated-icon {
  transform: rotateY(180deg);
}

/* ==========================================================================
   Catalogue Section
   ========================================================================== */

#catalogue .content-carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

#catalogue .carousel-item img {
  height: 400px;
  object-fit: cover;
  width: 100%;
}

#catalogue .price-table {
  background: linear-gradient(to right, var(--light-gray), var(--white));
  border-radius: var(--radius-lg);
}

#catalogue .price-item {
  padding: 0.75rem 0;
  transition: background-color var(--transition-fast);
}

#catalogue .price-item:hover {
  background-color: rgba(74, 110, 224, 0.1);
}

#catalogue .card {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

#catalogue .card-image {
  overflow: hidden;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#catalogue .card-image img {
  transition: transform var(--transition-slow);
  width: 100%;
  height: 250px;
  object-fit: cover;
}

#catalogue .card:hover .card-image img {
  transform: scale(1.05);
}

#catalogue .card-body {
  display: flex;
  flex-direction: column;
  width: 100%;
}

#catalogue .price {
  color: var(--primary);
  font-size: 1.25rem;
  margin-top: auto;
}

/* ==========================================================================
   Statistics Section
   ========================================================================== */

#statistics {
  position: relative;
  overflow: hidden;
}

#statistics::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, var(--primary-dark), var(--primary));
  z-index: -1;
}

#statistics .stat-item {
  text-align: center;
  padding: 1.5rem;
  transition: transform var(--transition-medium);
}

#statistics .stat-item:hover {
  transform: translateY(-10px);
}

#statistics .stat-circle {
  position: relative;
  width: 120px;
  height: 120px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-circle);
}

#statistics .progress-ring {
  position: relative;
  width: 120px;
  height: 120px;
  display: flex;
  justify-content: center;
  align-items: center;
}

#statistics .progress-ring-circle {
  transform-origin: center;
  transform: rotate(-90deg);
  stroke-dasharray: 314;
  stroke-dashoffset: 314;
  transition: stroke-dashoffset 2s ease;
}

#statistics .progress-ring-circle-bg {
  transform-origin: center;
  transform: rotate(-90deg);
}

#statistics .stat-circle span {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}

/* ==========================================================================
   History Section
   ========================================================================== */

#histoire .image-container {
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

#histoire .image-container img {
  transition: transform var(--transition-slow);
  width: 100%;
  height: 400px;
  object-fit: cover;
}

#histoire .image-container:hover img {
  transform: scale(1.05);
}

/* ==========================================================================
   Partners Section
   ========================================================================== */

#partners .partner-card {
  height: 100%;
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  background-color: var(--white);
}

#partners .partner-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

#partners .icon-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 70px;
  height: 70px;
  margin: 0 auto;
  background-color: rgba(74, 110, 224, 0.1);
  border-radius: var(--radius-circle);
  color: var(--primary);
  transition: transform var(--transition-medium), background-color var(--transition-medium);
}

#partners .partner-card:hover .icon-wrapper {
  transform: rotateY(360deg);
  background-color: var(--primary);
  color: var(--white);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */

#projects .card {
  height: 100%;
  overflow: hidden;
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

#projects .card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

#projects .card-image {
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

#projects .card-image img {
  transition: transform var(--transition-slow);
  width: 100%;
  height: 300px;
  object-fit: cover;
}

#projects .card:hover .card-image img {
  transform: scale(1.05);
}

/* ==========================================================================
   Research Section
   ========================================================================== */

#research .image-container {
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

#research .image-container img {
  transition: transform var(--transition-slow);
  width: 100%;
  height: 400px;
  object-fit: cover;
}

#research .image-container:hover img {
  transform: scale(1.05);
}

/* ==========================================================================
   Gallery Section
   ========================================================================== */

#galerie .gallery-item {
  position: relative;
  overflow: hidden;
  margin-bottom: 30px;
  height: 300px;
  cursor: pointer;
}

#galerie .gallery-item img {
  transition: transform var(--transition-slow);
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#galerie .gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  color: var(--white);
  opacity: 0;
  transition: opacity var(--transition-medium);
  padding: 2rem;
  text-align: center;
}

#galerie .gallery-title {
  font-size: 1.25rem;
  font-weight: 700;
  transform: translateY(20px);
  transition: transform var(--transition-medium);
}

#galerie .gallery-item:hover img {
  transform: scale(1.1);
}

#galerie .gallery-item:hover .gallery-overlay {
  opacity: 1;
}

#galerie .gallery-item:hover .gallery-title {
  transform: translateY(0);
}

/* ==========================================================================
   Events Calendar Section
   ========================================================================== */

#evenements .calendar-container {
  height: 100%;
  background-color: var(--white);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

#evenements .calendar-container:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

#evenements .event-date {
  width: 60px;
  height: 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: transform var(--transition-medium);
}

#evenements .event-item:hover .event-date {
  transform: scale(1.1);
}

#evenements .card {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#evenements .card-image {
  overflow: hidden;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#evenements .card-image img {
  transition: transform var(--transition-slow);
  width: 100%;
  height: 400px;
  object-fit: cover;
}

#evenements .card:hover .card-image img {
  transform: scale(1.05);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

#contact .contact-info {
  margin-bottom: 2rem;
}

#contact .icon-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 50px;
  height: 50px;
  background-color: rgba(74, 110, 224, 0.1);
  border-radius: var(--radius-circle);
  color: var(--primary);
  transition: transform var(--transition-medium), background-color var(--transition-medium);
}

#contact .contact-info div:hover .icon-wrapper {
  transform: rotateY(360deg);
  background-color: var(--primary);
  color: var(--white);
}

#contact .map-container {
  overflow: hidden;
}

#contact .map-container img {
  transition: transform var(--transition-slow);
  width: 100%;
  height: 300px;
  object-fit: cover;
}

#contact .map-container:hover img {
  transform: scale(1.05);
}

#contact .contact-form-container {
  background-color: var(--white);
  box-shadow: var(--shadow-lg);
}

#contact .form-control,
#contact .form-select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--medium-gray);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#contact .form-control:focus,
#contact .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 0.25rem rgba(74, 110, 224, 0.25);
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer {
  background-color: var(--black);
  color: var(--white);
  padding: 4rem 0 2rem;
}

footer h3 {
  position: relative;
  display: inline-block;
  margin-bottom: 1.5rem;
}

footer h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 50px;
  height: 2px;
  background-color: var(--primary);
}

footer ul {
  padding-left: 0;
}

footer ul li {
  margin-bottom: 0.5rem;
}

footer a {
  color: var(--white);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

footer a:hover {
  color: var(--primary-light);
  transform: translateX(5px);
}

footer .social-links a {
  margin-right: 1rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

footer .social-links a:hover {
  color: var(--primary-light);
  transform: none;
}

/* ==========================================================================
   Additional Pages Styles
   ========================================================================== */


.success-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.success-content {
  text-align: center;
  max-width: 600px;
  padding: 3rem;
  background-color: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.success-icon {
  font-size: 5rem;
  color: var(--accent2);
  margin-bottom: 2rem;
}

/* ==========================================================================
   Media Queries
   ========================================================================== */

@media (max-width: 991.98px) {
  :root {
    --h1-size: 2.75rem;
    --h2-size: 2.25rem;
    --h3-size: 1.75rem;
    --h4-size: 1.25rem;
    --h5-size: 1.1rem;
  }
  
  section {
    padding: var(--spacing-md) 0;
  }
  
  #hero h1 {
    font-size: 2.75rem;
  }
  
  #hero p {
    font-size: 1.1rem;
  }
  
  #catalogue .carousel-item img,
  #histoire .image-container img,
  #research .image-container img {
    height: 350px;
  }
  
  #galerie .gallery-item {
    height: 250px;
  }
}

@media (max-width: 767.98px) {
  :root {
    --h1-size: 2.5rem;
    --h2-size: 2rem;
    --h3-size: 1.5rem;
    --h4-size: 1.25rem;
    --h5-size: 1rem;
  }
  
  #hero h1 {
    font-size: 2.5rem;
  }
  
  #hero p {
    font-size: 1rem;
  }
  
  #catalogue .carousel-item img,
  #histoire .image-container img,
  #research .image-container img,
  #evenements .card-image img {
    height: 300px;
  }
  
  #galerie .gallery-item {
    height: 200px;
  }
  
  .btn-lg {
    padding: 0.5rem 1.5rem;
    font-size: 1.1rem;
  }
}

@media (max-width: 575.98px) {
  :root {
    --h1-size: 2.25rem;
    --h2-size: 1.75rem;
    --h3-size: 1.5rem;
    --h4-size: 1.25rem;
    --h5-size: 1rem;
  }
  
  #hero {
    height: auto !important;
    min-height: 500px;
  }
  
  #hero h1 {
    font-size: 2.25rem;
  }
  
  #catalogue .carousel-item img,
  #histoire .image-container img,
  #research .image-container img,
  #evenements .card-image img {
    height: 250px;
  }
  
  #galerie .gallery-item {
    height: 180px;
  }
  
  #statistics .stat-circle {
    width: 100px;
    height: 100px;
  }
  
  #statistics .progress-ring {
    width: 100px;
    height: 100px;
  }
  
  #statistics .progress-ring-circle,
  #statistics .progress-ring-circle-bg {
    r: 40;
    cx: 50;
    cy: 50;
  }
  
  #statistics .stat-circle span {
    font-size: 1.25rem;
  }
}

.icon-wrapper {
  display: none !important;
}