:root {

  color-scheme: dark;



  --bg: #071521;

  --bg-alt: #0b1d2c;

  --panel: #0d2233;

  --panel-light: #102a3e;



  --line: #244357;



  --ink: #f3f7f8;

  --muted: #9db1bd;



  --accent: #55e6c1;

  --accent-soft: #8df0d7;



  --max-width: 1180px;

  --hero-width: 1640px;

}



* {

  box-sizing: border-box;

}



html {

  scroll-behavior: smooth;

}



body {

  margin: 0;



  background: var(--bg);

  color: var(--ink);



  font-family:

    Inter,

    ui-sans-serif,

    system-ui,

    -apple-system,

    BlinkMacSystemFont,

    "Segoe UI",

    sans-serif;



  font-size: 16px;

  line-height: 1.6;



  -webkit-font-smoothing: antialiased;

}



img {

  max-width: 100%;

}



a {

  color: inherit;

}



a:focus-visible {

  outline: 3px solid var(--accent);

  outline-offset: 5px;

}



.wrap {

  width: min(var(--max-width), calc(100% - 56px));

  margin-inline: auto;

}





/* =========================================================

   HEADER

   ========================================================= */



.site-header {

  position: relative;

  z-index: 20;



  background: rgba(7, 21, 33, 0.96);



  border-bottom: 1px solid var(--line);

}



.top {

  min-height: 62px;



  display: flex;

  align-items: center;

  justify-content: space-between;



  gap: 32px;

}



.brand {

  color: var(--ink);



  font-size: 1.2rem;

  font-weight: 900;



  letter-spacing: 0.18em;



  text-decoration: none;

}



.brand span {

  color: var(--accent);

}



nav {

  display: flex;

  align-items: center;



  gap: 30px;

}



nav a {

  color: var(--muted);



  font-size: 0.86rem;

  font-weight: 600;



  text-decoration: none;



  transition: color 160ms ease;

}



nav a:hover {

  color: var(--accent);

}





/* =========================================================

   HERO

   ========================================================= */



.hero {

  position: relative;



  min-height: calc(100vh - 62px);



  display: flex;

  align-items: center;



  overflow: hidden;



  border-bottom: 1px solid var(--line);



  background:

    radial-gradient(

      ellipse at 75% 45%,

      rgba(15, 84, 105, 0.28) 0%,

      rgba(8, 48, 65, 0.15) 35%,

      transparent 67%

    ),

    var(--bg);

}



.hero::before {

  content: "";



  position: absolute;

  inset: 0;



  z-index: 1;



  pointer-events: none;



  background:

    linear-gradient(

      90deg,

      var(--bg) 0%,

      rgba(7, 21, 33, 0.98) 22%,

      rgba(7, 21, 33, 0.75) 34%,

      rgba(7, 21, 33, 0.20) 47%,

      transparent 62%

    );

}



.hero-grid {

  width: min(var(--hero-width), calc(100% - 80px));



  position: relative;

  z-index: 2;



  display: grid;



  grid-template-columns:

    minmax(450px, 0.72fr)

    minmax(800px, 1.28fr);



  align-items: center;



  gap: 20px;



  margin-inline: auto;



  padding-block: 48px;

}





/* =========================================================

   HERO CONTENT

   ========================================================= */



.hero-content {

  position: relative;

  z-index: 10;



  min-width: 0;

}



.eyebrow {

  margin: 0 0 20px;



  color: var(--accent);



  font-size: 0.72rem;

  font-weight: 800;



  letter-spacing: 0.18em;

  text-transform: uppercase;

}



h1,

h2,

h3,

p {

  margin-top: 0;

}



h1 {

  max-width: 550px;



  margin-bottom: 28px;



  font-size: clamp(3rem, 3.55vw, 4.1rem);

  font-weight: 800;



  line-height: 1;

  letter-spacing: -0.05em;

}



h1 em {

  color: var(--accent);



  font-style: normal;

}



.lead {

  max-width: 520px;



  margin-bottom: 32px;



  color: var(--muted);



  font-size: 1rem;

  line-height: 1.72;

}



.hero-actions {

  display: flex;

  flex-wrap: wrap;



  gap: 12px;

}



.button {

  min-height: 50px;



  display: inline-flex;

  align-items: center;

  justify-content: center;



  padding: 12px 22px;



  border: 1px solid var(--accent);



  font-size: 0.88rem;

  font-weight: 800;



  text-decoration: none;



  transition:

    background 160ms ease,

    color 160ms ease,

    border-color 160ms ease,

    transform 160ms ease;

}



.button:hover {

  transform: translateY(-2px);

}



.button-primary {

  background: var(--accent);

  color: #04151a;

}



.button-primary:hover {

  background: var(--accent-soft);

  border-color: var(--accent-soft);

}



.button-secondary {

  background: rgba(7, 21, 33, 0.30);

  color: var(--ink);

}



.button-secondary:hover {

  background: rgba(85, 230, 193, 0.08);

}





/* =========================================================

   HERO VISUAL

   ========================================================= */

.hero-visual {
  position: relative;
  z-index: 2;

  min-width: 0;

  height: min(82vh, 760px);
  min-height: 620px;

  overflow: visible;
  isolation: isolate;
}

.hero-visual::before,
.hero-visual::after {
  display: none;
}

.hero-visual img {
  position: absolute;
  z-index: 2;

  width: auto;
  max-width: none;
  height: 100%;

  top: 50%;
  left: 50%;

  transform: translate(-38%, -50%);

  object-fit: contain;

  border: 0;
  box-shadow: none;

  -webkit-mask-image:
    linear-gradient(
      to right,
      transparent 0%,
      transparent 8%,
      rgba(0, 0, 0, 0.15) 14%,
      rgba(0, 0, 0, 0.55) 20%,
      #000 29%,
      #000 92%,
      rgba(0, 0, 0, 0.75) 96%,
      transparent 100%
    )
    linear-gradient(
      to bottom,
      transparent 0%,
      rgba(0, 0, 0, 0.45) 5%,
      #000 13%,
      #000 87%,
      rgba(0, 0, 0, 0.45) 95%,
      transparent 100%
    );

  -webkit-mask-composite: source-in;

  mask-image:
    linear-gradient(
      to right,
      transparent 0%,
      rgba(0, 0, 0, 0.10) 3%,
      rgba(0, 0, 0, 0.45) 9%,
      #000 20%,
      #000 92%,
      rgba(0, 0, 0, 0.75) 96%,
      transparent 100%
    ),
    linear-gradient(
      to bottom,
      transparent 0%,
      rgba(0, 0, 0, 0.45) 5%,
      #000 13%,
      #000 87%,
      rgba(0, 0, 0, 0.45) 95%,
      transparent 100%
    );

  mask-composite: intersect;
}


/* =========================================================

   GLOBAL SECTIONS

   ========================================================= */



.section {

  padding: 100px 0;



  border-bottom: 1px solid var(--line);

}



.section-grid {

  display: grid;



  grid-template-columns: 0.7fr 1.7fr;



  gap: 70px;

}



.section h2 {

  margin-bottom: 0;



  font-size: clamp(2.3rem, 4vw, 4rem);



  line-height: 1.02;

  letter-spacing: -0.05em;

}



.section h2 span {

  color: var(--accent);

}



.section-heading {

  display: grid;



  grid-template-columns: 1.3fr 0.8fr;



  align-items: end;



  gap: 70px;



  margin-bottom: 54px;

}



.section-intro {

  max-width: 520px;



  margin-bottom: 5px;



  color: var(--muted);



  font-size: 1rem;

  line-height: 1.75;

}





/* =========================================================

   VISION

   ========================================================= */



.vision {

  background: var(--bg-alt);

}



.vision-content h2 {

  margin-bottom: 36px;

}



.vision-text {

  display: grid;



  grid-template-columns: repeat(2, 1fr);



  gap: 42px;

}



.vision-text p {

  margin-bottom: 0;



  color: var(--muted);



  line-height: 1.8;

}





/* =========================================================

   EXPERTISE

   ========================================================= */



.expertise-section {

  background: var(--bg);

}



.expertise-grid {

  display: grid;



  grid-template-columns: repeat(2, 1fr);



  border-top: 1px solid var(--line);

  border-left: 1px solid var(--line);

}



.expertise-card {

  min-height: 265px;



  display: grid;



  grid-template-columns: 55px 1fr;



  gap: 20px;



  padding: 34px;



  border-right: 1px solid var(--line);

  border-bottom: 1px solid var(--line);



  transition: background 180ms ease;

}



.expertise-card:hover {

  background: rgba(85, 230, 193, 0.035);

}



.card-number {

  color: var(--accent);



  font-size: 0.7rem;

  font-weight: 800;



  letter-spacing: 0.15em;

}



.card-category {

  margin-bottom: 24px;



  color: var(--accent);



  font-size: 0.68rem;

  font-weight: 800;



  letter-spacing: 0.14em;

  text-transform: uppercase;

}



.expertise-card h3 {

  max-width: 390px;



  margin-bottom: 13px;



  font-size: 1.35rem;



  line-height: 1.2;

  letter-spacing: -0.025em;

}



.expertise-card p:last-child {

  max-width: 440px;



  margin-bottom: 0;



  color: var(--muted);



  font-size: 0.92rem;

  line-height: 1.7;

}





/* =========================================================

   APPROACH

   ========================================================= */



.approach {

  background: var(--bg-alt);

}



.approach-grid {

  display: grid;



  grid-template-columns: repeat(3, 1fr);



  gap: 34px;

}



.approach-card {

  min-height: 220px;



  padding: 28px 26px;



  background: var(--panel);



  border-top: 3px solid var(--accent);

}



.approach-card > span {

  display: block;



  margin-bottom: 42px;



  color: var(--accent);



  font-size: 0.72rem;

  font-weight: 800;

}



.approach-card h3 {

  margin-bottom: 12px;



  font-size: 1.3rem;

}



.approach-card p {

  margin-bottom: 0;



  color: var(--muted);



  font-size: 0.92rem;

}





/* =========================================================

   AUDIENCES

   ========================================================= */



.audiences {

  background: var(--bg);

}



.audience-grid {

  display: grid;



  grid-template-columns: repeat(3, 1fr);



  gap: 1px;



  background: var(--line);



  border: 1px solid var(--line);

}



.audience-grid article {

  min-height: 220px;



  padding: 32px;



  background: var(--bg);

}



.audience-grid span {

  display: block;



  margin-bottom: 42px;



  color: var(--accent);



  font-size: 0.72rem;

  font-weight: 800;

}



.audience-grid h3 {

  margin-bottom: 12px;



  font-size: 1.3rem;

}



.audience-grid p {

  margin-bottom: 0;



  color: var(--muted);



  font-size: 0.92rem;

}





/* =========================================================

   CONTACT

   ========================================================= */



.contact-section {

  background: var(--accent);

  color: #06171d;

}



.contact-section .eyebrow {

  color: #0a4a42;

}



.contact {

  display: flex;



  align-items: center;

  justify-content: space-between;



  gap: 60px;

}



.contact h2 {

  color: #06171d;

}



.contact p:not(.eyebrow) {

  max-width: 650px;



  margin-top: 22px;

  margin-bottom: 0;



  color: #174d48;



  font-size: 1rem;

}



.contact-link {

  display: inline-flex;

  align-items: center;



  gap: 18px;



  color: #06171d;



  font-size: clamp(1.1rem, 2vw, 1.45rem);

  font-weight: 800;



  text-decoration: none;



  border-bottom: 2px solid #06171d;

}



.contact-link span {

  transition: transform 160ms ease;

}



.contact-link:hover span {

  transform: translate(4px, -4px);

}





/* =========================================================

   FOOTER

   ========================================================= */



.site-footer {

  padding: 42px 0;



  background: #041019;

}



.footer-content {

  display: flex;



  align-items: flex-end;

  justify-content: space-between;



  gap: 40px;

}



.footer-brand {

  display: inline-block;



  margin-bottom: 10px;

}



.footer-content p {

  margin-bottom: 0;



  color: var(--muted);



  font-size: 0.85rem;

}



.footer-meta {

  display: flex;

  flex-direction: column;



  align-items: flex-end;



  gap: 7px;



  color: var(--muted);



  font-size: 0.82rem;

}



.footer-meta a {

  text-underline-offset: 4px;

}





/* =========================================================

   RESPONSIVE — LARGE

   ========================================================= */



@media (max-width: 1450px) {



  .hero-grid {

    width: calc(100% - 60px);



    grid-template-columns:

      minmax(420px, 0.78fr)

      minmax(650px, 1.22fr);



    gap: 18px;

  }



  .hero-visual {

    height: min(70vh, 650px);

    min-height: 520px;

  }



  h1 {

    font-size: clamp(2.8rem, 4vw, 3.8rem);

  }



}





/* =========================================================

   RESPONSIVE — MEDIUM

   ========================================================= */



@media (max-width: 1150px) {



  .hero-grid {

    grid-template-columns:

      minmax(380px, 0.85fr)

      minmax(500px, 1.15fr);



    gap: 16px;

  }



  .hero-visual {

    height: min(62vh, 590px);

    min-height: 470px;

  }



  h1 {

    font-size: clamp(2.7rem, 4.5vw, 3.5rem);

  }



  .section-heading {

    gap: 40px;

  }



}





/* =========================================================

   RESPONSIVE — TABLET

   ========================================================= */



@media (max-width: 900px) {



  .wrap {

    width: min(var(--max-width), calc(100% - 36px));

  }



  .top {

    min-height: auto;



    padding: 22px 0;



    align-items: flex-start;

    flex-direction: column;



    gap: 16px;

  }



  nav {

    width: 100%;



    gap: 18px;



    flex-wrap: wrap;

  }



  .hero {

    min-height: auto;

  }



  .hero::before {

    display: none;

  }



  .hero-grid {

    width: calc(100% - 36px);



    grid-template-columns: 1fr;



    gap: 35px;



    padding-block: 58px;

  }



  .hero-content {

    max-width: 680px;

  }



  h1 {

    max-width: 650px;



    font-size: clamp(2.8rem, 9vw, 4rem);

  }



  .hero-visual {

    width: 100%;



    height: auto;

    min-height: 0;



    aspect-ratio: 16 / 10;

  }



  .hero-visual img {

    width: 100%;

    height: 100%;



    left: 0;

    top: 0;



    transform: none;



    object-fit: cover;

  }



  .hero-visual::after {

    background:

      linear-gradient(

        90deg,

        var(--bg) 0%,

        rgba(7, 21, 33, 0.20) 4%,

        transparent 12%,

        transparent 88%,

        rgba(7, 21, 33, 0.20) 96%,

        var(--bg) 100%

      ),

      linear-gradient(

        180deg,

        var(--bg) 0%,

        rgba(7, 21, 33, 0.18) 5%,

        transparent 14%,

        transparent 84%,

        rgba(7, 21, 33, 0.30) 94%,

        var(--bg) 100%

      );

  }



  .section {

    padding: 78px 0;

  }



  .section-grid,

  .section-heading {

    grid-template-columns: 1fr;



    gap: 28px;

  }



  .vision-text {

    gap: 26px;

  }



  .expertise-grid {

    grid-template-columns: 1fr;

  }



  .approach-grid,

  .audience-grid {

    grid-template-columns: 1fr;

  }



  .contact {

    align-items: flex-start;

    flex-direction: column;

  }



  .footer-content {

    align-items: flex-start;

    flex-direction: column;

  }



  .footer-meta {

    align-items: flex-start;

  }



}





/* =========================================================

   RESPONSIVE — PHONE

   ========================================================= */



@media (max-width: 560px) {



  .wrap {

    width: calc(100% - 30px);

  }



  nav {

    gap: 13px;

  }



  nav a {

    font-size: 0.78rem;

  }



  .hero-grid {

    width: calc(100% - 30px);



    padding-block: 50px;

  }



  h1 {

    font-size: clamp(2.5rem, 12vw, 3.5rem);

  }



  .lead {

    font-size: 1rem;

  }



  .hero-actions {

    align-items: stretch;

    flex-direction: column;

  }



  .button {

    width: 100%;

  }



  .hero-visual {

    aspect-ratio: 4 / 3;

  }



  .section {

    padding: 64px 0;

  }



  .section h2 {

    font-size: 2.5rem;

  }



  .vision-text {

    grid-template-columns: 1fr;

  }



  .expertise-card {

    grid-template-columns: 1fr;



    min-height: 0;



    padding: 27px 24px;

  }



  .expertise-card .card-number {

    margin-bottom: 10px;

  }



  .card-category {

    margin-bottom: 16px;

  }



  .approach-grid {

    gap: 18px;

  }

  .approach-card {

    min-height: 0;

  }



  .audience-grid article {

    min-height: 0;

  }



  .contact-link {

    font-size: 1rem;



    overflow-wrap: anywhere;

  }



}

/* =========================================================
   ACCESSIBILITÉ & PRÉFÉRENCES UTILISATEUR
   ========================================================= */

.skip-link {
  position: fixed;
  z-index: 9999;
  top: 12px;
  left: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  background: #ffffff;
  color: #071521;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

#main-content:focus {
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}