/* ========================================
   Societe.lu - Style principal
   ======================================== */

/* --- Variables --- */
:root {
  --navy: #0F2B46;
  --navy-light: #1a3a5c;
  --accent: #ffffff;
  --accent-light: #e8edf2;
  --white: #ffffff;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-400: #ced4da;
  --gray-600: #868e96;
  --gray-800: #343a40;
  --text: #2c3e50;
  --text-light: #5a6c7d;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(15, 43, 70, 0.08);
  --shadow-lg: 0 12px 48px rgba(15, 43, 70, 0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  background: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--navy);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.25rem; }

p {
  color: var(--text-light);
  max-width: 640px;
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 16px;
}

.section-title {
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.1rem;
  margin-bottom: 36px;
}

/* --- Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 43, 70, 0.2);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

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

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

.btn-navy:hover {
  background: var(--navy-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* ========================================
   HEADER / NAV
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  padding: 12px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.5px;
}

.logo span {
  color: rgba(255, 255, 255, 0.6);
}

.header.scrolled .logo span {
  color: var(--navy-light);
}

.header.scrolled .logo {
  color: var(--navy);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--navy);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--white);
}

.nav-links a:hover::after {
  width: 100%;
}

.header.scrolled .nav-links a {
  color: var(--text-light);
}

.header.scrolled .nav-links a:hover {
  color: var(--navy);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switch {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  padding: 6px 12px;
  border-radius: 6px;
  transition: all var(--transition);
}

.lang-switch:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.header.scrolled .lang-switch {
  color: var(--gray-600);
}

.header.scrolled .lang-switch:hover {
  color: var(--navy);
  background: var(--gray-100);
}

.header .btn-primary {
  padding: 10px 24px;
  font-size: 0.85rem;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all var(--transition);
  border-radius: 2px;
}

.header.scrolled .hamburger span {
  background: var(--navy);
}

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

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--navy);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--white);
}

.mobile-menu a:hover {
  color: var(--white);
}

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative;
  padding: 140px 0 80px;
  background: var(--navy);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 43, 70, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 43, 70, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

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

.hero-content {
  max-width: 680px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
}

.hero-label svg {
  width: 16px;
  height: 16px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero h1 .highlight {
  color: rgba(255, 255, 255, 0.7);
}

.hero p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 40px;
  max-width: 540px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-decoration {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 400px;
  height: 400px;
  opacity: 0.15;
  pointer-events: none;
}

.hero-decoration .circle {
  position: absolute;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
}

.hero-decoration .circle-1 {
  width: 400px;
  height: 400px;
  top: 0;
  left: 0;
}

.hero-decoration .circle-2 {
  width: 280px;
  height: 280px;
  top: 60px;
  left: 60px;
}

.hero-decoration .circle-3 {
  width: 160px;
  height: 160px;
  top: 120px;
  left: 120px;
}

/* ========================================
   ABOUT / VALUES
   ======================================== */
.about {
  background: var(--white);
}

.about-header {
  text-align: center;
  margin-bottom: 40px;
}

.about-header p {
  margin: 0 auto;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-card {
  padding: 36px 28px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  text-align: center;
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(15, 43, 70, 0.15);
}

.value-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--navy);
  color: var(--white);
}

.value-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--white);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.value-card h3 {
  margin-bottom: 10px;
}

.value-card p {
  font-size: 0.9rem;
  color: var(--gray-600);
}

/* ========================================
   SERVICES
   ======================================== */
.services {
  background: var(--gray-50);
}

.services-header {
  text-align: center;
  margin-bottom: 40px;
}

.services-header p {
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--white);
  padding: 44px 36px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--navy);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--navy);
  margin: 0 auto 24px;
}

.service-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--white);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-card h3 {
  margin-bottom: 14px;
  font-size: 1.3rem;
}

.service-card p {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ========================================
   TARGET / POUR QUI
   ======================================== */
.target {
  background: var(--white);
}

.target-header {
  text-align: center;
  margin-bottom: 40px;
}

.target-header p {
  margin: 0 auto;
}

.target-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.target-card {
  padding: 36px 28px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--gray-200);
  text-align: center;
  transition: all var(--transition);
}

.target-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(15, 43, 70, 0.15);
}

.target-card-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--navy);
}

.target-card-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--white);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.target-card h3 {
  color: var(--navy);
  margin-bottom: 12px;
}

.target-card p {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ========================================
   CONTACT / CTA
   ======================================== */
.contact {
  background: var(--gray-50);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  margin-bottom: 20px;
}

.contact-info > p {
  margin-bottom: 36px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(15, 43, 70, 0.1);
  flex-shrink: 0;
}

.contact-detail-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--navy);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-detail-text {
  font-size: 0.9rem;
}

.contact-detail-text strong {
  display: block;
  color: var(--navy);
  font-weight: 600;
  margin-bottom: 2px;
}

.contact-detail-text span {
  color: var(--text-light);
}

.contact-detail-text a {
  color: var(--navy);
  font-weight: 500;
}

.contact-detail-text a:hover {
  text-decoration: underline;
}

.linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding: 12px 24px;
  background: var(--navy);
  color: var(--white);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}

.linkedin-link:hover {
  background: var(--navy-light);
  transform: translateY(-2px);
}

.linkedin-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Contact Form */
.contact-form {
  background: var(--white);
  padding: 44px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 24px;
}

.contact-form .form-full {
  grid-column: 1 / -1;
}

.form-group {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  transition: border-color var(--transition);
  background: var(--gray-50);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--navy);
  background: var(--white);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-400);
}

.contact-form .btn {
  width: 100%;
  justify-content: center;
  padding: 16px;
  font-size: 1rem;
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}

.form-success.active {
  display: block;
}

.form-success svg {
  width: 56px;
  height: 56px;
  stroke: #22c55e;
  fill: none;
  stroke-width: 2;
  margin: 0 auto 16px;
}

.form-success h3 {
  margin-bottom: 8px;
}

.form-success p {
  margin: 0 auto;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--navy);
  padding: 60px 0 30px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
  display: inline-block;
}

.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}

.footer h4 {
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
  color: var(--white);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .services-grid .service-card:last-child {
    grid-column: 1 / -1;
    max-width: 500px;
    margin: 0 auto;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .hero-decoration {
    display: none;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .contact-form {
    grid-template-columns: 1fr;
  }

  .nav-links,
  .nav-right .lang-switch {
    display: none;
  }

  .nav-right {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 140px 0 80px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    justify-content: center;
  }

  .values-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

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

  .services-grid .service-card:last-child {
    max-width: none;
  }

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

  .contact-form {
    padding: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .values-grid {
    grid-template-columns: 1fr;
  }

  h1 { font-size: 2rem; }

  .hero-label {
    font-size: 0.75rem;
  }
}