/* ==========================================================================
   UNIVERS DU FER — Page d'accueil
   Palette : bleu (#0d47a1), jaune (#ffc107), blanc, noir (#0d1117)
   ========================================================================== */

:root {
  --udf-blue: #0d47a1;
  --udf-blue-dark: #082d6b;
  --udf-blue-light: #1565c0;
  --udf-yellow: #ffc107;
  --udf-yellow-dark: #e6ac00;
  --udf-white: #ffffff;
  --udf-black: #0d1117;
  --udf-gray: #6c757d;
  --udf-gray-light: #f4f6f9;
  --udf-shadow: 0 10px 40px rgba(13, 71, 161, 0.12);
  --udf-shadow-hover: 0 20px 50px rgba(13, 71, 161, 0.2);
  --udf-radius: 16px;
  --udf-transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --udf-font: "Plus Jakarta Sans", system-ui, sans-serif;
}

/* --- Base --- */
body.udf-home {
  font-family: var(--udf-font);
  color: var(--udf-black);
  overflow-x: hidden;
  scroll-behavior: smooth;
}

/* --- Navbar --- */
.udf-navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.06);
  padding: 0.75rem 0;
  transition: var(--udf-transition);
}

.udf-navbar.scrolled {
  padding: 0.5rem 0;
  box-shadow: 0 4px 30px rgba(13, 71, 161, 0.1);
}

.udf-navbar .navbar-toggler-icon {
  filter: invert(1) grayscale(1);
}

.udf-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--udf-black);
}

.udf-logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--udf-blue), var(--udf-blue-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--udf-yellow);
  font-size: 1.25rem;
  box-shadow: 0 4px 15px rgba(13, 71, 161, 0.35);
}

.udf-logo-text {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.udf-logo-text span {
  color: var(--udf-blue);
}

.udf-nav-link {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--udf-black) !important;
  padding: 0.5rem 1rem !important;
  position: relative;
  transition: var(--udf-transition);
}

.udf-nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--udf-yellow);
  transition: var(--udf-transition);
  transform: translateX(-50%);
}

.udf-nav-link:hover::after,
.udf-nav-link.active::after {
  width: 60%;
}

.udf-nav-link:hover {
  color: var(--udf-blue) !important;
}

.btn-udf-primary {
  background: linear-gradient(135deg, var(--udf-blue), var(--udf-blue-light));
  color: var(--udf-white);
  border: none;
  font-weight: 700;
  padding: 0.65rem 1.5rem;
  border-radius: 50px;
  transition: var(--udf-transition);
  box-shadow: 0 4px 20px rgba(13, 71, 161, 0.35);
}

.btn-udf-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(13, 71, 161, 0.45);
  color: var(--udf-white);
  background: linear-gradient(135deg, var(--udf-blue-dark), var(--udf-blue));
}

.btn-udf-outline {
  background: transparent;
  color: var(--udf-white);
  border: 2px solid var(--udf-white);
  font-weight: 700;
  padding: 0.65rem 1.75rem;
  border-radius: 50px;
  transition: var(--udf-transition);
}

.btn-udf-outline:hover {
  background: var(--udf-white);
  color: var(--udf-blue);
  transform: translateY(-2px);
}

.btn-udf-yellow {
  background: linear-gradient(135deg, var(--udf-yellow), #ffdb4d);
  color: var(--udf-black);
  border: none;
  font-weight: 700;
  padding: 0.65rem 1.75rem;
  border-radius: 50px;
  transition: var(--udf-transition);
  box-shadow: 0 4px 20px rgba(255, 193, 7, 0.4);
}

.btn-udf-yellow:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 193, 7, 0.55);
  color: var(--udf-black);
}

/* --- Hero --- */
.udf-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background:
    linear-gradient(135deg, rgba(13, 71, 161, 0.92) 0%, rgba(8, 45, 107, 0.88) 50%, rgba(13, 17, 23, 0.85) 100%),
    url("https://images.unsplash.com/photo-1504307651254-35680f356dfd?w=1920&q=80") center/cover no-repeat;
  padding-top: 80px;
}

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

.udf-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 193, 7, 0.2);
  border: 1px solid rgba(255, 193, 7, 0.5);
  color: var(--udf-yellow);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease forwards;
}

.udf-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--udf-white);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  animation: fadeInUp 0.8s ease 0.15s forwards;
  opacity: 0;
}

.udf-hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255, 255, 255, 0.88);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease 0.3s forwards;
  opacity: 0;
}

.udf-hero-buttons {
  animation: fadeInUp 0.8s ease 0.45s forwards;
  opacity: 0;
}

/* --- Sections communes --- */
.udf-section {
  padding: 5rem 0;
}

.udf-section-alt {
  background: var(--udf-gray-light);
}

.udf-section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--udf-black);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.udf-section-title .highlight {
  color: var(--udf-blue);
}

.udf-section-subtitle {
  color: var(--udf-gray);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 3rem;
}

.udf-label {
  display: inline-block;
  background: rgba(13, 71, 161, 0.1);
  color: var(--udf-blue);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.35rem 1rem;
  border-radius: 50px;
  margin-bottom: 1rem;
}

/* --- Cartes produits --- */
.udf-product-card {
  background: var(--udf-white);
  border-radius: var(--udf-radius);
  overflow: hidden;
  box-shadow: var(--udf-shadow);
  transition: var(--udf-transition);
  height: 100%;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.udf-product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--udf-shadow-hover);
}

.udf-product-img {
  height: 180px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.udf-product-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 71, 161, 0.5), transparent);
}

.udf-product-icon {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  width: 48px;
  height: 48px;
  background: var(--udf-yellow);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--udf-black);
  font-size: 1.25rem;
  z-index: 1;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.udf-product-body {
  padding: 1.5rem;
}

.udf-product-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.udf-product-body p {
  color: var(--udf-gray);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  line-height: 1.6;
}

.btn-udf-card {
  color: var(--udf-blue);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--udf-transition);
}

.btn-udf-card:hover {
  color: var(--udf-blue-dark);
  gap: 0.65rem;
}

/* --- Pourquoi nous --- */
.udf-feature-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--udf-white);
  border-radius: var(--udf-radius);
  box-shadow: var(--udf-shadow);
  transition: var(--udf-transition);
  height: 100%;
}

.udf-feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--udf-shadow-hover);
}

.udf-feature-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.25rem;
  background: linear-gradient(135deg, var(--udf-blue), var(--udf-blue-light));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--udf-yellow);
  font-size: 1.75rem;
  transition: var(--udf-transition);
}

.udf-feature-card:hover .udf-feature-icon {
  transform: scale(1.08) rotate(-3deg);
}

.udf-feature-card h4 {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.udf-feature-card p {
  color: var(--udf-gray);
  font-size: 0.9rem;
  margin: 0;
}

/* --- Services teaser --- */
.udf-service-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.25rem;
  background: var(--udf-white);
  border-radius: 12px;
  margin-bottom: 1rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  transition: var(--udf-transition);
}

.udf-service-item:hover {
  transform: translateX(6px);
  box-shadow: var(--udf-shadow);
}

.udf-service-item i {
  color: var(--udf-blue);
  font-size: 1.25rem;
  margin-top: 0.2rem;
}

/* --- Contact --- */
.udf-contact-info {
  background: linear-gradient(160deg, var(--udf-blue), var(--udf-blue-dark));
  border-radius: var(--udf-radius);
  padding: 2.5rem;
  color: var(--udf-white);
  height: 100%;
}

.udf-contact-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.udf-contact-item i {
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--udf-yellow);
  flex-shrink: 0;
}

.udf-contact-form {
  background: var(--udf-white);
  border-radius: var(--udf-radius);
  padding: 2.5rem;
  box-shadow: var(--udf-shadow);
}

.udf-contact-form .form-control,
.udf-contact-form .form-select {
  border: 2px solid #e9ecef;
  border-radius: 10px;
  padding: 0.75rem 1rem;
  transition: var(--udf-transition);
}

.udf-contact-form .form-control:focus,
.udf-contact-form .form-select:focus {
  border-color: var(--udf-blue);
  box-shadow: 0 0 0 4px rgba(13, 71, 161, 0.1);
}

.btn-whatsapp {
  background: #25d366;
  color: var(--udf-white);
  border: none;
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  transition: var(--udf-transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-whatsapp:hover {
  background: #1da851;
  color: var(--udf-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

/* --- Footer --- */
.udf-footer {
  background: var(--udf-black);
  color: rgba(255, 255, 255, 0.75);
  padding: 4rem 0 0;
}

.udf-footer h5 {
  color: var(--udf-white);
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.udf-footer a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--udf-transition);
  display: block;
  padding: 0.25rem 0;
}

.udf-footer a:hover {
  color: var(--udf-yellow);
  padding-left: 4px;
}

.udf-social-link {
  width: 42px;
  height: 42px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--udf-white) !important;
  margin-right: 0.5rem;
  padding: 0 !important;
  transition: var(--udf-transition);
}

.udf-social-link:hover {
  background: var(--udf-yellow);
  color: var(--udf-black) !important;
  transform: translateY(-3px);
  padding-left: 0 !important;
}

.udf-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 3rem;
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.9rem;
}

/* --- WhatsApp flottant --- */
.udf-whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 60px;
  height: 60px;
  background: #25d366;
  color: var(--udf-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
  z-index: 1050;
  transition: var(--udf-transition);
  animation: pulseWhatsApp 2.5s infinite;
}

.udf-whatsapp-float:hover {
  transform: scale(1.1);
  color: var(--udf-white);
  box-shadow: 0 8px 40px rgba(37, 211, 102, 0.6);
}

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

@keyframes pulseWhatsApp {
  0%, 100% { box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5); }
  50% { box-shadow: 0 6px 40px rgba(37, 211, 102, 0.8), 0 0 0 12px rgba(37, 211, 102, 0.15); }
}

.udf-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.udf-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- À propos --- */
.udf-about-img {
  border-radius: var(--udf-radius);
  box-shadow: var(--udf-shadow-hover);
  width: 100%;
  object-fit: cover;
  min-height: 350px;
}

/* --- Responsive --- */
@media (max-width: 991.98px) {
  .udf-hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .udf-section {
    padding: 3.5rem 0;
  }

  .udf-navbar .navbar-collapse {
    background: var(--udf-white);
    padding: 1rem;
    border-radius: 12px;
    margin-top: 0.75rem;
    box-shadow: var(--udf-shadow);
  }
}

@media (max-width: 575.98px) {
  .udf-contact-form,
  .udf-contact-info {
    padding: 1.5rem;
  }

  .udf-whatsapp-float {
    width: 52px;
    height: 52px;
    bottom: 20px;
    right: 20px;
    font-size: 1.5rem;
  }
}