/* ============================================
   VARIABLES CSS
   ============================================ */
:root {
  --color-primary: #003D6B;
  --color-secondary: #E67E22;
  --color-accent: #F39C12;
  --color-neutral-dark: #2C3E50;
  --color-neutral-light: #ECF0F1;
  --color-white: #FFFFFF;
  
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  
  --transition-fast: 0.3s ease;
  --transition-slow: 0.6s ease;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

/* ============================================
   GLOBAL STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-neutral-dark);
  overflow-x: hidden;
}

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

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

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

.z-index-2 {
  position: relative;
  z-index: 2;
}

/* ============================================
   NAVBAR
   ============================================ */
#mainNavbar {
  background-color: transparent;
  transition: background-color var(--transition-fast), padding var(--transition-fast);
  padding: 1rem 0;
}

#mainNavbar.scrolled {
  background-color: rgba(0, 61, 107, 0.95);
  backdrop-filter: blur(10px);
  padding: 0.5rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
  display: flex;
  align-items: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--color-white) !important;
}

.logo-img {
  height: 40px;
  width: auto;
}

.brand-text {
  margin-left: 0.5rem;
}

.navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  font-weight: 600;
  padding: 0.5rem 1rem !important;
  transition: var(--transition-fast);
  position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--color-secondary) !important;
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: width var(--transition-fast);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
  width: 80%;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
  min-height: 100vh;
  background: linear-gradient(135deg, rgba(0, 61, 107, 0.9) 0%, rgba(44, 62, 80, 0.9) 100%),
              url('https://images.unsplash.com/photo-1574629810360-7efbbe195018?w=1920&q=80') center/cover;
  background-attachment: fixed;
  position: relative;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 61, 107, 0.75);
  z-index: 1;
}

.hero-title {
  text-shadow: 2px 4px 8px rgba(0, 0, 0, 0.5);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  text-shadow: 1px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-ctas .btn {
  min-width: 200px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0.75rem 2rem;
}

.btn-primary {
  background-color: var(--color-secondary);
  border: none;
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: #d35400;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(230, 126, 34, 0.4);
}

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

.scroll-indicator {
  animation: bounce 2s infinite;
}

.scroll-icon {
  font-size: 2rem;
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0) translateX(-50%);
  }
  50% {
    transform: translateY(10px) translateX(-50%);
  }
}

@media (max-width: 768px) {
  .hero-section {
    background-attachment: scroll;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-ctas .btn {
    min-width: auto;
    width: 100%;
    margin-bottom: 1rem;
  }
}

/* ============================================
   SECTIONS GENERAL
   ============================================ */
section {
  padding: 80px 0;
}

.section-title {
  position: relative;
  padding-bottom: 15px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

/* ============================================
   PROBLÉMATIQUE SECTION
   ============================================ */
.section-problem {
  background-color: var(--color-neutral-light);
}

.problem-card {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.problem-icon {
  color: var(--color-secondary);
}

.problem-icon i {
  opacity: 0.9;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* ============================================
   MISSION SECTION
   ============================================ */
.section-mission {
  background: linear-gradient(135deg, var(--color-primary) 0%, #005a9e 100%);
  color: var(--color-white);
}

.mission-equation {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.equation-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.equation-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.equation-text {
  font-weight: 600;
  font-size: 0.9rem;
}

.equation-plus,
.equation-equals {
  font-size: 1.5rem;
  font-weight: bold;
}

.vision-card {
  background-color: var(--color-white);
}

.vision-list {
  list-style: none;
  padding: 0;
}

/* ============================================
   PÔLE 1 SECTION
   ============================================ */
.section-pole1 {
  background-color: var(--color-neutral-light);
}

.timeline {
  position: relative;
  padding: 40px 0;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 40px;
  position: relative;
}

.timeline-marker {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-right: 20px;
  box-shadow: var(--shadow-md);
}

.timeline-content {
  flex-grow: 1;
  border-left: 3px solid var(--color-secondary);
  padding-left: 20px;
}

.classification-badge {
  font-size: 0.9rem;
}

.criteria-card {
  transition: transform var(--transition-fast);
  background-color: var(--color-white) !important;
}

.criteria-card:hover {
  transform: translateY(-5px);
}

.criteria-card i {
  color: var(--color-primary) !important;
}

.benefits-card {
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-neutral-light) 100%);
}

@media (max-width: 768px) {
  .timeline-marker {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .timeline-content {
    padding-left: 15px;
  }
}

/* ============================================
   PÔLE 2 SECTION
   ============================================ */
.section-pole2 {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  color: var(--color-white);
}

.yesi-pillar {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.yesi-pillar:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.2);
}

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

.objective-card {
  background-color: var(--color-white);
  transition: transform var(--transition-fast);
}

.objective-card:hover {
  transform: translateY(-5px);
}

.objective-card i {
  color: var(--color-secondary) !important;
  opacity: 0.9;
}

.format-card {
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  transition: transform var(--transition-fast);
}

.format-card:hover {
  transform: translateY(-5px);
}

.results-card {
  background: #8B4513;
  backdrop-filter: blur(10px);
}

.result-stat {
  font-size: 4rem;
  color: #495057 !important;
}

/* ============================================
   SYNERGIE SECTION
   ============================================ */
.section-synergy {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-neutral-dark) 100%);
  color: var(--color-white);
}

.synergy-step {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  transition: transform var(--transition-fast);
}

.synergy-step:hover {
  transform: translateY(-5px);
}

.step-number {
  font-size: 1.5rem;
}

.synergy-benefit {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

/* ============================================
   PARTENAIRES SECTION
   ============================================ */
.section-partners {
  background-color: var(--color-white);
}

.partner-card {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  background-color: var(--color-white) !important;
}

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

.partner-icon {
  color: var(--color-primary);
}

.partner-icon .text-dark {
  color: #495057 !important;
}

.partner-card .bi-check {
  color: #28a745 !important;
  font-weight: bold;
}

/* ============================================
   OFFRES SECTION
   ============================================ */
.section-offers {
  background-color: var(--color-neutral-light);
}

.offer-card {
  border: 2px solid transparent;
  border-radius: 12px;
  transition: all var(--transition-fast);
  background: var(--color-white);
}

.offer-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-xl) !important;
}

.border-premium {
  border-color: var(--color-secondary) !important;
}

.badge-recommended {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
  color: var(--color-white);
  padding: 8px 16px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
}

.price {
  border-bottom: 2px solid var(--color-neutral-light);
  padding-bottom: 15px;
}

.price-amount {
  color: var(--color-secondary);
}

/* ============================================
   STATS SECTION
   ============================================ */
.section-stats {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2c5f8d 100%);
  position: relative;
  overflow: hidden;
}

.stat-item {
  padding: 30px;
  transition: transform var(--transition-fast);
}

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

.stat-icon .text-gray {
  color: #6c757d !important;
  opacity: 0.8;
}

.stat-icon i {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.stat-number {
  color: var(--color-white);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.stat-number::after {
  content: '%';
  margin-left: 5px;
}

.stat-item:nth-child(2) .stat-number::after,
.stat-item:nth-child(3) .stat-number::after {
  content: '';
}

@media (max-width: 768px) {
  .stat-number {
    font-size: 3rem;
  }
}

/* ============================================
   CTA FINAL SECTION
   ============================================ */
.section-cta {
  background-color: var(--color-white);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.section-contact {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-neutral-dark) 100%);
  color: var(--color-white);
}

.contact-form-card {
  background: var(--color-white);
  border-radius: 12px;
}

.form-control,
.form-select {
  border-radius: 8px;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  transition: border-color var(--transition-fast);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 0.2rem rgba(230, 126, 34, 0.25);
}

.form-label {
  font-weight: 600;
  color: var(--color-primary);
}

.contact-email-link {
  color: var(--color-white);
  transition: color var(--transition-fast);
}

.contact-email-link:hover {
  color: var(--color-secondary);
}

.invalid-feedback {
  font-size: 0.875rem;
}

.form-check-input:checked {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
}

/* ============================================
   FOOTER
   ============================================ */
.footer-custom {
  background: radial-gradient(circle at top, rgba(15, 23, 42, 1), #020617 70%);
  border-top: 1px solid rgba(30, 64, 175, 0.6);
  color: var(--color-white);
}

.footer-logo {
  height: 40px;
}

.footer-divider {
  border-color: rgba(255, 255, 255, 0.1);
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */
.btn-scroll-top {
  position: fixed;
  right: 1.2rem;
  bottom: 1.4rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-white);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  z-index: 1040;
  cursor: pointer;
  font-size: 0.95rem;
}

.btn-scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.btn-scroll-top:hover {
  transform: translateY(-3px) scale(1.1);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* ============================================
   RESPONSIVE TWEAKS
   ============================================ */
@media (max-width: 991.98px) {
  section {
    padding: 60px 0;
  }
  
  .display-4 {
    font-size: 2rem;
  }
  
  .display-3 {
    font-size: 2.5rem;
  }
}

@media (max-width: 575.98px) {
  section {
    padding: 40px 0;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .mission-equation {
    flex-direction: column;
  }
  
  .equation-plus,
  .equation-equals {
    transform: rotate(90deg);
  }
}