/* ============ En-tête ============ */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  padding-block: var(--space-4);
  background: rgba(15, 27, 51, 0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: padding-block var(--duration-base) var(--ease-standard),
    background var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard);
}

.site-header.is-scrolled {
  padding-block: var(--space-3);
  background: rgba(15, 27, 51, 0.92);
  border-bottom-color: var(--color-navy-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-300);
  color: var(--color-off-white);
  white-space: nowrap;
  line-height: 1;
}

.logo-mark-icon {
  flex-shrink: 0;
  color: var(--color-turquoise);
}

.logo-mark-text {
  position: relative;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-7);
}

.nav-list {
  display: none;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--fs-100);
  font-weight: 500;
  color: var(--color-muted-on-navy);
  padding-block: var(--space-1);
}

.main-nav .nav-cta {
  display: none;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-off-white);
  transition: transform var(--duration-base) var(--ease-standard),
    opacity var(--duration-base) var(--ease-standard);
}

.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);
}

.mobile-nav {
  position: fixed;
  inset: 0;
  top: 0;
  z-index: 45;
  background: var(--color-navy);
  padding: calc(var(--space-9) + 2rem) var(--container-pad) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
  transform: translateY(-100%);
  transition: transform var(--duration-slow) var(--ease-standard);
}

.mobile-nav.is-open {
  transform: translateY(0);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.mobile-nav-list a {
  font-family: var(--font-display);
  font-size: var(--fs-500);
  color: var(--color-off-white);
}

@media (min-width: 1024px) {
  .nav-list {
    display: flex;
  }

  .main-nav .nav-cta {
    display: inline-flex;
  }

  .nav-toggle,
  .mobile-nav {
    display: none;
  }
}

/* ============ Hero ============ */
.hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--space-10) + 3rem);
  padding-bottom: var(--space-10);
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: var(--space-8);
}

.hero-content {
  max-width: 38rem;
}

.hero-lede {
  font-size: var(--fs-300);
  color: var(--color-muted-on-navy);
  margin-top: var(--space-5);
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-7);
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-navy-line);
  font-size: var(--fs-100);
  color: var(--color-muted-on-navy);
}

.hero-facts li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.hero-facts li:not(:last-child)::after {
  content: "";
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    min-height: 34rem;
  }
}

/* Monogramme + lignes de construction — motif discret, jamais central */
.hero-motif {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero-monogram {
  position: absolute;
  right: -2.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(12rem, 34vw, 22rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(247, 247, 244, 0.14);
  letter-spacing: -0.04em;
  user-select: none;
}

.hero-guides {
  position: absolute;
  inset: 0;
}

.hero-guides .h-line {
  position: absolute;
  height: 1px;
  background: var(--color-navy-line);
}

.hero-guides .v-line {
  position: absolute;
  width: 1px;
  background: var(--color-navy-line);
}

.hero-guides .tick {
  position: absolute;
  width: 10px;
  height: 10px;
}

.hero-guides .tick::before,
.hero-guides .tick::after {
  content: "";
  position: absolute;
  background: var(--color-turquoise);
  opacity: 0.55;
}

.hero-guides .tick::before {
  inset-inline: 0;
  top: 50%;
  height: 1px;
}

.hero-guides .tick::after {
  inset-block: 0;
  left: 50%;
  width: 1px;
}

@media (max-width: 1023.98px) {
  .hero-monogram {
    font-size: clamp(8rem, 60vw, 14rem);
    right: -1.5rem;
    opacity: 0.6;
  }
}

/* ============ Bénéfices ============ */
.benefits-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .benefits-grid {
    grid-template-columns: repeat(12, 1fr);
    column-gap: var(--space-6);
  }

  .benefit-item {
    grid-column: span 4;
  }

  .benefit-item--offset {
    margin-top: var(--space-6);
  }
}

/* ============ Offre ============ */
.offer-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 5vw, var(--space-9));
}

.offer-intro {
  max-width: 42rem;
  margin-bottom: var(--space-7);
}

.offer-columns {
  display: grid;
  gap: var(--space-6);
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .offer-columns {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
  }
}

.offer-price-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.offer-terms {
  margin-top: var(--space-4);
  font-size: var(--fs-100);
  color: var(--color-muted);
}

.offer-maintenance {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 768px) {
  .offer-maintenance {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============ Réalisation ============ */
/* Conserve la respiration large d'origine : seule section non concernée
   par la réduction générale des espacements (voir §1 de la passe de
   finition), pour laisser respirer la mise en scène de la démonstration. */
#realisation {
  padding-block: var(--section-pad-block-wide);
}

.realisation-layout {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.realisation-layout > * {
  min-width: 0;
}

@media (min-width: 1024px) {
  .realisation-layout {
    grid-template-columns: 5fr 7fr;
  }
}

.realisation-copy {
  max-width: 30rem;
}

/* ============ Méthode ============ */
.steps-list {
  margin-top: var(--space-3);
}

.step-item {
  display: grid;
  gap: var(--space-2) var(--space-5);
  padding-block: 2.1rem;
  border-top: 1px solid var(--color-border);
}

.step-item:last-child {
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .step-item {
    grid-template-columns: 4.5rem 1fr;
    align-items: baseline;
  }
}

/* ============ À propos ============ */
.about-layout {
  max-width: 42rem;
}

.about-quote {
  margin-top: var(--space-6);
  padding-left: var(--space-6);
  border-left: 2px solid var(--color-turquoise);
}

/* ============ Parrainage ============ */
#parrainage {
  padding-block: clamp(2.75rem, 5vw, 4rem);
}

.referral-panel {
  max-width: 46rem;
}

.referral-amount {
  font-family: var(--font-display);
  font-size: var(--fs-400);
  font-weight: 600;
  color: var(--color-navy);
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 56rem;
  border-top: 1px solid var(--color-border);
}

/* ============ Contact ============ */
.contact-layout {
  display: grid;
  gap: var(--space-7);
}

@media (min-width: 768px) {
  .contact-layout {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-8);
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.contact-direct {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ============ Pied de page ============ */
.site-footer {
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-navy-line);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-6);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  font-size: var(--fs-100);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--fs-100);
  color: var(--color-muted-on-navy);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-navy-line);
}

/* ============ Pages légales ============ */
.legal-page main {
  padding-top: calc(var(--space-10) + 2rem);
  padding-bottom: var(--space-9);
}

.legal-page .container {
  max-width: 52rem;
}

.legal-page section {
  margin-top: var(--space-7);
}

.legal-page h2 {
  font-size: var(--fs-400);
  margin-bottom: var(--space-3);
}

.legal-page p + p {
  margin-top: var(--space-4);
}