/* Reset et variables CSS */
:root {
  --primary-color: #0A2463;
  --secondary-color: #3E92CC;
  --accent-color: #3E92CC;
  --text-dark: #333333;
  --text-light: #666666;
  --text-lighter: #999999;
  --bg-light: #F5F5F5;
  --bg-white: #FFFFFF;
  --border-color: #E5E5E5;
  --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, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max-width: 1200px;
  --container-padding: 2rem;
}

/* Reset CSS */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--secondary-color);
}

ul {
  list-style: none;
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  min-height: 48px;
}

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

.btn-primary:hover {
  background-color: #081a4a;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: var(--bg-white);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: var(--secondary-color);
  border: 2px solid var(--secondary-color);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

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

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
  min-height: 56px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem var(--container-padding);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.nav-brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

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

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

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--secondary-color);
  transition: width 0.3s ease;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--primary-color);
  margin: 3px 0;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  position: relative;
  padding: 10rem 0 5rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: url('../assets/images/hero-bg.png') center/cover no-repeat;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 36, 99, 0.88) 0%, rgba(10, 36, 99, 0.7) 50%, rgba(62, 146, 204, 0.5) 100%);
  z-index: 1;
}

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

.hero-content {
  max-width: 720px;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  color: var(--bg-white);
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--bg-white);
  margin-bottom: 1.5rem;
}

.hero-highlight {
  color: var(--secondary-color);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

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

.hero .btn-primary:hover {
  background-color: transparent;
  color: var(--bg-white);
  border-color: var(--bg-white);
  transform: translateY(-2px);
}

.hero .btn-secondary {
  color: var(--bg-white);
  border-color: rgba(255, 255, 255, 0.5);
}

.hero .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--bg-white);
  border-color: var(--bg-white);
  transform: translateY(-2px);
}

.hero-proof {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  width: 100%;
}

.proof-item {
  text-align: left;
  flex: 1;
  min-width: 0;
}

.proof-item strong {
  display: block;
  font-size: 1.6rem;
  color: var(--secondary-color);
  font-weight: 700;
  line-height: 1.2;
}

.proof-item span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

/* Problem Section */
.problem-section {
  background-color: var(--bg-light);
}

.problem-section .container {
  max-width: 900px;
}

.section-intro {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-lead {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-top: 0.5rem;
}

.problems-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.problem-card {
  background-color: var(--bg-white);
  padding: 1.5rem 1.25rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--secondary-color);
  transition: var(--transition);
}

.problem-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.problem-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  line-height: 1;
}

.problem-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.problem-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 1.55;
}

.problem-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding: 1.5rem 2rem;
  background-color: var(--bg-white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.problem-conclusion {
  margin: 0;
  flex: 1;
  color: var(--text-dark);
  font-size: 0.95rem;
  line-height: 1.6;
}

.problem-cta .btn {
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .problems-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .problem-cta {
    flex-direction: column;
    text-align: center;
    padding: 1.5rem;
  }
}

/* Clients Band */
.clients-band {
  padding: 2rem 0;
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
}

.clients-label {
  text-align: center;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-lighter);
  margin-bottom: 1.2rem;
  font-weight: 500;
}

.clients-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.client-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary-color);
  opacity: 0.5;
  letter-spacing: 1px;
  transition: var(--transition);
}

.client-name:hover {
  opacity: 1;
}

/* CTA Band */
.cta-band {
  padding: 3rem 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, #1a3a7a 100%);
  text-align: center;
}

.cta-band .cta-text {
  color: var(--bg-white);
  font-size: 1.3rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

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

.cta-band .btn-primary:hover {
  background-color: transparent;
  color: var(--bg-white);
  border-color: var(--bg-white);
}

/* Section Styles */
section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Services Section */
.services {
  background-color: var(--bg-white);
}

.services .container {
  max-width: 900px;
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.service-card {
  background-color: var(--bg-white);
  padding: 1.5rem 1.25rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.service-card:nth-child(5) {
  grid-column: 1 / -1;
  max-width: 50%;
  margin: 0 auto;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  line-height: 1;
}

.service-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.service-description {
  color: var(--text-light);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  line-height: 1.55;
}

/* Réalisations Section */
.realisations {
  background-color: var(--bg-light);
}

.realisations .container {
  max-width: 900px;
}

.realisations-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.realisation-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background-color: var(--bg-white);
  padding: 1.25rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.realisation-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.realisation-icon {
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
}

.realisation-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.35rem;
}

.realisation-description {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 1.55;
}

/* Expertise Section */
.expertise {
  background-color: var(--bg-white);
}

.expertise-content {
  max-width: 800px;
  margin: 0 auto;
}

.expertise-intro {
  text-align: center;
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 3rem;
  line-height: 1.7;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.value-item {
  text-align: center;
  padding: 2rem 1.5rem;
  border-radius: var(--border-radius-lg);
  background-color: var(--bg-light);
  transition: var(--transition);
}

.value-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.value-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.value-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.value-description {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Certifications Section */
.certifications {
  background-color: var(--bg-light);
}

.certifications-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  align-items: stretch;
}

.certification-item {
  background-color: var(--bg-white);
  padding: 1.5rem 1.2rem;
  border-radius: var(--border-radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  flex: 1;
  min-width: 180px;
  max-width: 220px;
}

.certification-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.certification-logo {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

.certification-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.certification-issuer {
  color: var(--text-lighter);
  font-size: 0.9rem;
}

/* Contact Section */
.contact {
  background-color: var(--bg-white);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-form-wrapper {
  background-color: var(--bg-light);
  padding: 2.5rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

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

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-dark);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
  background-color: var(--bg-white);
}

.form-input:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 3px rgba(62, 146, 204, 0.1);
}

.form-input.error {
  border-color: #dc3545;
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.field-error {
  display: block;
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  min-height: 1.2em;
}

.form-input::placeholder {
  color: var(--text-lighter);
}

textarea.form-input {
  resize: vertical;
  min-height: 120px;
}

.form-success,
.form-error {
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-top: 1rem;
  font-weight: 500;
}

.form-success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.form-error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.contact-details h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.contact-details p {
  color: var(--text-light);
  line-height: 1.6;
}

/* Footer */
.footer {
  background-color: var(--primary-color);
  color: var(--bg-white);
  padding: 3rem 0 1.5rem;
}

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

.footer-logo {
  height: 36px;
  width: auto;
  margin-bottom: 0.75rem;
  filter: brightness(0) invert(1);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.footer-slogan {
  font-style: italic;
  margin-top: 1rem !important;
  font-size: 0.95rem;
}

.footer-social h4 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.social-link {
  color: rgba(255, 255, 255, 0.8);
  display: inline-block;
  margin-bottom: 0.5rem;
}

.social-link:hover {
  color: var(--bg-white);
}

.footer-link {
  color: rgba(255, 255, 255, 0.8);
  display: inline-block;
  margin-bottom: 0.5rem;
}

.footer-link:hover {
  color: var(--bg-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 1.5rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Respect des préférences utilisateur - Accessibilité */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }

  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero {
    padding: 7rem 0 3rem;
    min-height: auto;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-cta .btn {
    text-align: center;
    justify-content: center;
  }

  .hero-proof {
    gap: 1.5rem;
    justify-content: flex-start;
  }

  .section-title {
    font-size: 2rem;
  }

  .section-subtitle {
    font-size: 1.1rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .service-card:nth-child(5) {
    max-width: 100%;
  }

  .realisations-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .realisation-item {
    flex-direction: row;
    text-align: left;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }

  .certifications-grid {
    flex-direction: column;
    align-items: center;
  }
  
  .certification-item {
    max-width: 100%;
    width: 100%;
    max-width: 320px;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-form-wrapper {
    padding: 2rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .btn-large {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    min-height: 48px;
  }

  .service-card {
    padding: 2rem 1.5rem;
  }

  .realisation-item {
    padding: 1.5rem;
  }

  .contact-form-wrapper {
    padding: 1.5rem;
  }
}

/* Focus states for accessibility */
.btn:focus,
.form-input:focus,
.nav-link:focus {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .header,
  .contact-form-wrapper,
  .footer {
    display: none;
  }

  body {
    font-size: 12pt;
    line-height: 1.4;
  }

  .hero {
    padding: 2rem 0;
  }
}