/* 
===========
DESIGN TOKENS & VARIABLES
===========
*/
:root {
  /* Colors */
  --bg-dark: #0a0c10;
  --bg-darker: #06070a;
  --bg-glass: rgba(20, 24, 32, 0.4);
  --border-glass: rgba(255, 255, 255, 0.08);
  
  --text-main: #f0f2f5;
  --text-muted: #9ba1a6;
  
  --primary-accent: #0070f3;
  --primary-glow: rgba(0, 112, 243, 0.4);
  
  /* Branch Colors */
  --branch-blue: #3b82f6; /* Informatique */
  --branch-green: #10b981; /* Academy */
  --branch-purple: #8b5cf6; /* Multimedia */
  --branch-orange: #f97316; /* Robotique */

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Spacing & Layout */
  --container-width: 1200px;
  --section-padding: 6rem 0;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* 
===========
RESET & BASE
===========
*/
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* For fixed navbar */
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--section-padding);
}

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

ul {
  list-style: none;
}

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

/* 
===========
UTILITIES
===========
*/
.glass-effect {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.highlight {
  color: var(--primary-accent);
}

.text-blue { color: var(--branch-blue); }
.text-green { color: var(--branch-green); }
.text-purple { color: var(--branch-purple); }
.text-orange { color: var(--branch-orange); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  font-weight: 500;
  font-family: var(--font-heading);
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--text-main);
  color: var(--bg-darker);
  box-shadow: 0 4px 14px rgba(255,255,255,0.1);
}

.btn-primary:hover {
  background-color: #d1d5db; /* gray-300 */
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,255,255,0.2);
}

.btn-secondary {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-block {
  width: 100%;
}

/* Background Glow Effect */
.bg-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
  background: 
    radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.1) 0%, transparent 40%);
}

/* 
===========
NAVIGATION
===========
*/
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: var(--transition-normal);
  padding: 1rem 0;
}

.navbar.scrolled {
  padding: 0.8rem 0;
  background: rgba(10, 12, 16, 0.8);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.logo-icon i {
  color: var(--primary-accent);
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-accent);
  transition: var(--transition-normal);
  border-radius: 2px;
}

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

.btn-contact.nav-link::after { display: none; }
.btn-contact {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-glass);
  border-radius: 6px;
  background: rgba(255,255,255,0.03);
}
.btn-contact:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  padding: 2rem;
  transform: translateY(-150%);
  transition: transform var(--transition-normal);
  z-index: 999;
  border-bottom: 1px solid var(--border-glass);
}

.mobile-menu.active {
  transform: translateY(0);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-align: center;
}

.mobile-link {
  font-size: 1.2rem;
  font-family: var(--font-heading);
  font-weight: 500;
}

/* 
===========
HERO SECTION
===========
*/
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('assets/hero_bg_abstract.png');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: -1;
  mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4rem;
}

.badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.floating-elements {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.float-card {
  position: absolute;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-weight: 500;
  animation: float 6s ease-in-out infinite;
}

.float-card i {
  width: 24px;
  height: 24px;
}

.card-1 {
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}
.card-2 {
  top: 50%;
  right: 5%;
  animation-delay: -2s;
}
.card-3 {
  bottom: 20%;
  left: 20%;
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* 
===========
ABOUT SECTION
===========
*/
.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
}

.about-image img {
  opacity: 0.8;
  mix-blend-mode: luminosity;
  transition: var(--transition-slow);
}

.about-image:hover img {
  mix-blend-mode: normal;
  transform: scale(1.05);
}

.experience-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--bg-darker);
  padding: 1.5rem;
  border-radius: 16px;
  display: flex;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--border-glass);
}

.experience-badge .number {
  font-size: 3rem;
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--primary-accent);
  line-height: 1;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}

.features-list {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 500;
}

/* 
===========
EXPERTISES (BRANCHES) SECTION
===========
*/
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.branches-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.branch-card {
  padding: 2rem;
  border-radius: 16px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.branch-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  transition: var(--transition-normal);
}

.branch-card:nth-child(1):hover::before { background: var(--branch-blue); }
.branch-card:nth-child(2):hover::before { background: var(--branch-green); }
.branch-card:nth-child(3):hover::before { background: var(--branch-purple); }
.branch-card:nth-child(4):hover::before { background: var(--branch-orange); }

.branch-card:hover {
  transform: translateY(-10px);
  background: rgba(255, 255, 255, 0.03);
}

.branch-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.icon-blue { background: rgba(59, 130, 246, 0.1); color: var(--branch-blue); }
.icon-green { background: rgba(16, 185, 129, 0.1); color: var(--branch-green); }
.icon-purple { background: rgba(139, 92, 246, 0.1); color: var(--branch-purple); }
.icon-orange { background: rgba(249, 115, 22, 0.1); color: var(--branch-orange); }

.branch-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.branch-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.branch-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.branch-tags li {
  font-size: 0.75rem;
  padding: 0.3rem 0.6rem;
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  color: var(--text-muted);
}

.branch-link {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 0.9rem;
}

.branch-card:nth-child(1) .branch-link:hover { color: var(--branch-blue); }
.branch-card:nth-child(2) .branch-link:hover { color: var(--branch-green); }
.branch-card:nth-child(3) .branch-link:hover { color: var(--branch-purple); }
.branch-card:nth-child(4) .branch-link:hover { color: var(--branch-orange); }

.branch-link i {
  transition: transform var(--transition-fast);
}
.branch-link:hover i {
  transform: translateX(4px);
}

/* 
===========
STATS SECTION
===========
*/
.stats {
  padding: 4rem 0;
}
.glass-effect-wrapper {
  background: linear-gradient(90deg, rgba(20, 24, 32, 0.4), rgba(20, 24, 32, 0.8), rgba(20, 24, 32, 0.4));
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.stats-container {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 2rem;
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-main);
  background: linear-gradient(135deg, #ffffff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  color: var(--text-muted);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 
===========
CONTACT SECTION
===========
*/
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

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

.method {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.method-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-accent);
}

.method h4 {
  font-family: var(--font-heading);
  margin-bottom: 0.2rem;
}

.method p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.contact-form-wrapper {
  padding: 3rem;
  border-radius: 20px;
}

.contact-form h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.form-group input, 
.form-group select, 
.form-group textarea {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  color: var(--text-main);
  font-family: var(--font-body);
  transition: var(--transition-fast);
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05);
}

.form-status {
  margin-top: 1rem;
  font-size: 0.9rem;
  text-align: center;
}

/* 
===========
FOOTER
===========
*/
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-glass);
  padding-top: 5rem;
}

.footer-container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  color: var(--text-muted);
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.social-link:hover {
  color: var(--text-main);
  transform: translateY(-3px);
}

.footer-links-group h4 {
  font-family: var(--font-heading);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.footer-links-group ul {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-links-group a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-links-group a:hover {
  color: var(--text-main);
  padding-left: 5px;
}

.footer-bottom {
  padding: 1.5rem 0;
  border-top: 1px solid var(--border-glass);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* 
===========
ANIMATIONS & REVEAL
===========
*/
.reveal-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-up.active,
.reveal-left.active,
.reveal-right.active {
  opacity: 1;
  transform: translate(0);
}

/* 
===========
RESPONSIVE
===========
*/
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-description {
    margin: 0 auto 2.5rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .floating-elements {
    display: none; /* Hide on smaller screens for cleaner look */
  }

  .about-container, .contact-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .about-image {
    order: -1;
  }
  
  .footer-container {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .branches-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-form-wrapper {
    padding: 2rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .footer-container {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
}