:root {
  --color-black-deep: #0A0A0A;
  --color-black-secondary: #141414;
  --color-white-off: #F5F5F0;
  --color-anthracite: #1C1C1C;
  --color-white-pure: #FFFFFF;
  --color-accent: #2E5FA3;
  --color-accent-hover: #1F4373;
  --color-platinum: #8C8C8C;

  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --transition-slow: 0.4s ease;
  --transition-hover: 0.5s ease;

  --container-max-width: 1100px;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-family-base);
  font-weight: 400;
  color: var(--color-anthracite);
  background-color: var(--color-white-pure);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

h1, h2, h3, p {
  margin: 0;
}

a:focus-visible,
.cta:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition: none !important;
  }
}

.cta {
  display: inline-block;
  padding: 0.9em 2em;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 0 0 rgba(46, 95, 163, 0);
  transition: background-color var(--transition-slow),
              border-color var(--transition-slow),
              color var(--transition-slow),
              box-shadow var(--transition-hover);
}

.cta--primary {
  background-color: var(--color-accent);
  color: var(--color-black-deep);
  border-color: var(--color-accent);
}

.cta--primary:hover,
.cta--primary:focus-visible {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: 0 10px 28px rgba(46, 95, 163, 0.35);
}

.cta--outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.cta--outline:hover,
.cta--outline:focus-visible {
  background-color: var(--color-accent);
  color: var(--color-black-deep);
  box-shadow: 0 10px 28px rgba(46, 95, 163, 0.35);
}

.site-header {
  background-color: var(--color-black-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.75rem 1.25rem;
}

.site-header__logo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
}

@media (min-width: 768px) {
  .site-header {
    padding: 2rem 1.25rem;
  }

  .site-header__logo {
    width: 96px;
    height: 96px;
  }
}

@media (min-width: 1024px) {
  .site-header {
    padding: 2.5rem 1.25rem;
  }

  .site-header__logo {
    width: 112px;
    height: 112px;
  }
}

.hero {
  background-color: var(--color-black-deep);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.hero__image {
  width: 100%;
  height: 55vh;
  object-fit: cover;
  transform-origin: center;
  animation: hero-kenburns 26s ease-in-out infinite alternate;
}

@keyframes hero-kenburns {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(1.08);
  }
}

.hero__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 2rem 1.25rem 3rem;
}

.hero__title {
  color: var(--color-white-off);
  font-size: clamp(1.5rem, 6vw, 2rem);
  font-weight: 400;
  line-height: 1.25;
  animation: hero-fade-in 1s ease-out both;
}

.hero__subtitle {
  color: var(--color-white-off);
  opacity: 0.85;
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.5;
  animation: hero-fade-in 1s ease-out 0.15s both;
}

.hero__content .cta {
  animation: hero-fade-in 1s ease-out 0.3s both;
}

@keyframes hero-fade-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 1024px) {
  .hero {
    flex-direction: row-reverse;
    min-height: 85vh;
  }

  .hero__image {
    width: 55%;
    height: auto;
    min-height: 85vh;
  }

  .hero__content {
    width: 45%;
    justify-content: center;
    padding: 4rem clamp(2rem, 5vw, 4rem);
  }

  .hero__title {
    font-size: clamp(2rem, 2.8vw, 2.75rem);
  }

  .hero__subtitle {
    font-size: 1.1rem;
  }
}

.preuve-sociale {
  background-color: var(--color-black-secondary);
  padding: 2.5rem 1.25rem;
  text-align: center;
}

.preuve-sociale__texte {
  color: var(--color-white-off);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 640px;
  margin: 0 auto;
}

.preuve-sociale__chiffre {
  color: var(--color-accent);
  font-size: 1.35em;
  font-weight: 600;
}

@media (min-width: 768px) {
  .preuve-sociale__texte {
    font-size: 1.2rem;
  }
}

.piliers {
  background-color: var(--color-white-pure);
  padding: 3.5rem 1.25rem;
}

.piliers__titre {
  text-align: center;
  color: var(--color-anthracite);
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  font-weight: 400;
  margin-bottom: 2.5rem;
}

.piliers__liste {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.pilier {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-platinum);
}

.pilier:first-child {
  padding-top: 0;
  border-top: none;
}

.pilier__titre {
  color: var(--color-anthracite);
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.pilier__texte {
  color: var(--color-anthracite);
  opacity: 0.85;
  font-size: 0.95rem;
  line-height: 1.6;
}

@media (min-width: 768px) {
  .piliers__liste {
    flex-direction: row;
    gap: 0;
  }

  .pilier {
    flex: 1;
    padding: 0 2rem;
    border-top: none;
    border-left: 1px solid var(--color-platinum);
  }

  .pilier:first-child {
    padding-left: 0;
    border-left: none;
  }

  .pilier:last-child {
    padding-right: 0;
  }
}

.galerie {
  background-color: var(--color-white-pure);
  padding: 3.5rem 1.25rem;
}

.galerie__titre {
  text-align: center;
  color: var(--color-anthracite);
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  font-weight: 400;
  margin-bottom: 2.5rem;
}

.galerie__liste {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.galerie__item {
  margin: 0;
  overflow: hidden;
  border-radius: 4px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  transition: box-shadow var(--transition-hover);
}

.galerie__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform var(--transition-hover);
}

.galerie__legende {
  padding: 0.75rem 0.25rem;
  text-align: center;
  color: var(--color-anthracite);
  font-size: 0.9rem;
  font-weight: 500;
}

@media (hover: hover) and (pointer: fine) {
  .galerie__item:hover {
    box-shadow: 0 20px 36px rgba(0, 0, 0, 0.22);
  }

  .galerie__item:hover .galerie__image {
    transform: scale(1.06);
  }
}

@media (min-width: 768px) {
  .galerie__liste {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
  }
}

.rappel-cta {
  background-color: var(--color-black-secondary);
  padding: 3.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.rappel-cta__texte {
  color: var(--color-white-off);
  font-size: 1.05rem;
  max-width: 480px;
}

.footer {
  background-color: var(--color-black-deep);
  padding: 2.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer__marque {
  color: var(--color-white-off);
  font-size: 0.95rem;
}

.footer__social {
  color: var(--color-white-off);
  opacity: 0.75;
  font-size: 0.9rem;
}

.footer__handle {
  color: var(--color-accent);
}

.cta-sticky {
  display: none;
}

@media (max-width: 767px) {
  .cta-sticky {
    display: flex;
    justify-content: center;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    padding: 0.75rem 1.25rem calc(0.75rem + env(safe-area-inset-bottom, 0px));
    background-color: var(--color-black-deep);
    opacity: 0;
    transform: translateY(100%);
    pointer-events: none;
    transition: opacity var(--transition-slow), transform var(--transition-slow);
  }

  .cta-sticky.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .cta-sticky__link {
    width: 100%;
    max-width: 360px;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}