/* ==========================================================================
   Lettra7 — Reproduction fidèle du design
   Sommaire :
   1. Variables & Reset
   2. Utilitaires (container, boutons)
   3. Header & Navigation
   4. Hero
   5. Bandeau "Nos services"
   6. Cartes de services
   7. CTA Contact
   8. Footer
   9. Cookie banner & Back-to-top
   10. Responsive (tablette / mobile)
   ========================================================================== */

/* ---------- 1. Variables & Reset ---------- */
:root {
  --color-primary: #221657;   /* Bleu marine - textes, titres */
  --color-accent: #6fcfeb;    /* Bleu ciel - accents, boutons */
  --color-white: #ffffff;
  --color-text: #333333;
  --font-heading: "Poppins", sans-serif;
  --font-body: "Poppins", sans-serif;
  --font-script: "Vujahday Script", cursive;
  --font-accent: "Roboto", sans-serif;
  --container-width: 1200px;
  --header-height: 96px;
  --transition: 0.3s ease;
}

* , *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

h1, h2, h3 { margin: 0; font-family: var(--font-heading); color: var(--color-primary); }

ul { list-style: none; margin: 0; padding: 0; }

button { font-family: inherit; cursor: pointer; border: none; background: none; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 12px 20px;
  z-index: 9999;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- 2. Utilitaires ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 14px 32px;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.btn-pill { border-radius: 100px; }

.nav-cta {
  background-color: var(--color-accent);
  color: var(--color-primary);
  padding: 13px 24px;
}
.nav-cta:hover, .nav-cta:focus-visible {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-cta {
  background-color: var(--color-accent);
  color: var(--color-primary);
  margin-top: 32px;
}
.btn-cta:hover, .btn-cta:focus-visible {
  background-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* ---------- 3. Header & Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: var(--color-white);
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  transition: box-shadow var(--transition);
}

.site-header.is-scrolled { box-shadow: 0 2px 16px rgba(34, 22, 87, 0.12); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.logo img { width: 160px; height: auto; }

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--color-primary);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav-link:hover, .nav-link:focus-visible {
  color: var(--color-accent);
}
.nav-link:hover::after, .nav-link:focus-visible::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 4. Hero ---------- */
.hero {
  position: relative;
  min-height: 800px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: url("assets/images/hero-bg.jpg") center center / cover no-repeat;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(34,22,87,0.35) 0%, rgba(34,22,87,0.55) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.hero h1 { display: flex; flex-direction: column; align-items: center; }

.hero-script {
  font-family: var(--font-script);
  font-size: 70px;
  font-weight: 600;
  color: var(--color-white);
  line-height: 1.1;
}

.hero-bold {
  font-family: var(--font-heading);
  font-size: 70px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-white);
  line-height: 1.1;
  letter-spacing: 1px;
}

/* ---------- 5. Bandeau "Nos services" ---------- */
.services-intro { position: relative; }

.services-intro-panel {
  background: var(--color-white);
  margin-top: -58px;
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 40px 24px 30px;
  border-radius: 12px 12px 0 0;
}

.services-intro-icon {
  display: inline-flex;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.services-intro-panel h2 {
  font-size: 32px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ---------- 6. Cartes de services ---------- */
.services-list { padding-bottom: 20px; }

.service-card { padding: 70px 0; }

.service-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  align-items: center;
  gap: 80px;
}

.service-card.reverse .service-grid { grid-template-columns: 1fr 420px; }
.service-card.reverse .service-media { order: 2; }
.service-card.reverse .service-text { order: 1; }

.service-media { position: relative; max-width: 378px; }

.service-media img {
  position: relative;
  z-index: 2;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  transition: transform var(--transition);
}

.service-card:hover .service-media img { transform: translate(-6px, -6px); }

.frame {
  position: absolute;
  top: 24px;
  left: 24px;
  width: 100%;
  height: 100%;
  border: 4px solid var(--color-accent);
  z-index: 1;
  transition: top var(--transition), left var(--transition);
}

.service-card.reverse .frame { left: -24px; }

.frame-primary { border-color: var(--color-primary); }
.frame-accent { border-color: var(--color-accent); }

.service-card:hover .frame { top: 16px; left: 16px; }
.service-card.reverse:hover .frame { left: -16px; }

.kicker {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--color-accent);
  margin: 0 0 8px;
}

.service-text h2 {
  font-size: 30px;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.4;
  margin-bottom: 16px;
}

.service-desc { font-size: 15px; line-height: 1.7; margin-bottom: 24px; max-width: 480px; }

.service-label {
  font-size: 16px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
}

.service-tags li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary);
}

.service-tags img { width: 24px; height: 24px; object-fit: contain; }

/* ---------- 7. CTA Contact ---------- */
.cta {
  background: linear-gradient(180deg, #ffffff 0%, #f4fafd 100%);
  padding: 90px 0;
  text-align: center;
}

.cta-inner h2 {
  font-size: 40px;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.3;
}

.cta-line-dark { display: block; color: var(--color-primary); }
.cta-line-accent { display: block; color: var(--color-accent); margin-top: 6px; }

/* ---------- 7bis. Page Contact ---------- */
.contact-hero { padding: 70px 0 100px; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info {
  border: 3px solid var(--color-accent);
  padding: 48px 40px;
  height: 100%;
}

.contact-info h1 { font-size: 32px; line-height: 1.3; }
.contact-info .cta-line-dark { color: var(--color-primary); font-weight: 700; text-transform: uppercase; }

.contact-subtitle {
  color: var(--color-accent);
  font-size: 24px;
  font-weight: 700;
  text-transform: uppercase;
  margin: 8px 0 40px;
}

.contact-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.6;
}

.contact-item img { width: 32px; height: 32px; object-fit: contain; flex-shrink: 0; }

.contact-item a { transition: color var(--transition); }
.contact-item a:hover, .contact-item a:focus-visible { color: var(--color-accent); }

.contact-form-card {
  background: var(--color-white);
  border: 3px solid var(--color-accent);
  box-shadow: 0 20px 50px rgba(34, 22, 87, 0.12);
  padding: 48px 40px;
  margin: -30px 0 0 0;
}

.contact-form-card h2 {
  font-size: 22px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  border: none;
  border-bottom: 2px solid #e3edf2;
  background: #f7fafc;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-primary);
  transition: border-color var(--transition), background-color var(--transition);
}

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

.form-group textarea { resize: vertical; min-height: 110px; }

.contact-form-card .btn-cta { margin-top: 8px; border: none; }

.form-feedback {
  margin: 16px 0 0;
  font-size: 14px;
  font-weight: 600;
  min-height: 20px;
}
.form-feedback.success { color: #1a8a4a; }
.form-feedback.error { color: #c0392b; }

.map-section { padding-bottom: 0; }
.map-section h2 {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 32px;
}
.map-embed { line-height: 0; }
.map-embed iframe { display: block; filter: grayscale(10%); }

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .contact-form-card { margin-top: 0; }
  .contact-details { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .contact-info, .contact-form-card { padding: 32px 24px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-hero { padding: 40px 0 60px; }
}

/* ---------- 7ter. Page Qui sommes-nous ---------- */
.about-hero { padding: 70px 0 100px; }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text {
  border: 3px solid var(--color-accent);
  padding: 56px 48px;
}

.about-script {
  font-family: var(--font-script);
  font-weight: 600;
  font-size: 56px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.about-subtitle {
  font-size: 32px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 32px;
}

.about-text p { font-size: 15px; line-height: 1.8; margin-bottom: 20px; color: var(--color-text); }
.about-text strong { color: var(--color-primary); }

.about-media img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-text { padding: 40px 28px; order: 1; }
  .about-media { order: 2; }
}

@media (max-width: 640px) {
  .about-script { font-size: 40px; }
  .about-subtitle { font-size: 24px; }
  .about-text { padding: 32px 24px; }
}

/* ---------- 8. Footer ---------- */
.site-footer { background: var(--color-primary); color: var(--color-white); }

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding: 60px 24px;
  align-items: start;
}

.footer-brand { display: flex; flex-direction: column; gap: 24px; }
.footer-brand img { width: 160px; height: auto; filter: brightness(1); }

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--color-white);
  color: var(--color-white);
  transition: background-color var(--transition), color var(--transition);
}
.social-icon:hover, .social-icon:focus-visible {
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.footer-contact h2 {
  color: var(--color-white);
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-contact p { margin: 0 0 10px; font-size: 14px; line-height: 1.6; }
.footer-contact a { transition: color var(--transition); }
.footer-contact a:hover, .footer-contact a:focus-visible { color: var(--color-accent); }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.15); }

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 24px;
}

.footer-bottom-inner a,
.footer-bottom-inner p {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-bottom-inner a:hover, .footer-bottom-inner a:focus-visible { color: var(--color-accent); }

/* ---------- 9. Cookie banner & Back-to-top ---------- */
.cookie-banner {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 900;
  background: rgba(20, 12, 45, 0.95);
  color: var(--color-white);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 16px 24px;
  font-size: 14px;
  transform: translateY(100%);
  transition: transform var(--transition);
}

.cookie-banner.is-visible { transform: translateY(0); }

.cookie-banner a { text-decoration: underline; }
.cookie-banner a:hover { color: var(--color-accent); }

.cookie-banner .btn {
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 13px;
  padding: 10px 22px;
  white-space: nowrap;
}
.cookie-banner .btn:hover { background: var(--color-white); }

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 800;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), background-color var(--transition);
}

.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover, .back-to-top:focus-visible { background: var(--color-accent); color: var(--color-primary); }

/* Fade-in on scroll */
.service-card, .cta-inner {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.service-card.in-view, .cta-inner.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 10. Responsive ---------- */
@media (max-width: 1024px) {
  :root { --container-width: 960px; }

  .service-grid { gap: 48px; grid-template-columns: 340px 1fr; }
  .service-card.reverse .service-grid { grid-template-columns: 1fr 340px; }

  .hero-script, .hero-bold { font-size: 54px; }
  .cta-inner h2 { font-size: 32px; }
}

@media (max-width: 860px) {
  .primary-nav {
    position: fixed;
    inset: var(--header-height) 0 0 0;
    background: var(--color-white);
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
    padding: 32px 24px;
  }

  .primary-nav.is-open { transform: translateX(0); }

  .primary-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .nav-cta { align-self: flex-start; }

  .nav-toggle { display: flex; }

  .service-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .service-card.reverse .service-grid { grid-template-columns: 1fr; }
  .service-card.reverse .service-media,
  .service-card.reverse .service-text { order: initial; }

  .service-media { margin: 0 auto; }

  .service-desc { margin-left: auto; margin-right: auto; }

  .service-tags { justify-content: center; }

  .frame, .service-card.reverse .frame { left: 24px; }
}

@media (max-width: 640px) {
  :root { --header-height: 80px; }

  .logo img { width: 120px; }

  .hero { min-height: 600px; }
  .hero-script { font-size: 38px; }
  .hero-bold { font-size: 38px; }

  .services-intro-panel h2 { font-size: 24px; }

  .service-card { padding: 48px 0; }
  .service-text h2 { font-size: 24px; }

  .cta { padding: 60px 0; }
  .cta-inner h2 { font-size: 24px; }

  .footer-inner { grid-template-columns: 1fr; padding: 48px 24px; }

  .footer-bottom-inner { justify-content: center; text-align: center; }

  .cookie-banner { flex-direction: column; text-align: center; }
}