/* Structural layout: container, header, footer, grids, section rhythm, responsive breakpoints. */

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{overflow-x:hidden;}
body{background:var(--bg);min-height:100vh;overflow-x:hidden;}
img{max-width:100%;}
::selection{background:var(--orange);color:#fff;}
input,select,textarea{font-family:var(--font-body);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--orange);outline-offset:2px;border-radius:3px;
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
}

.section{
  max-width:1200px;
  margin:0 auto;
  padding:48px 40px 20px;
}

/* ---------- top techno bar ---------- */
.techno-bar{
  height:3px;
  background:linear-gradient(90deg,#0C1E3C 0%,#1E5FD0 38%,#3BA5FF 55%,#1E5FD0 68%,#DD7A33 100%);
}

/* ---------- top contact bar ---------- */
.topbar{
  background:var(--navy-gradient);
  color:#fff;
}
.topbar__inner{
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
  height:42px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  font-size:13px;
}
.topbar__label{
  display:flex;
  align-items:center;
  gap:9px;
  color:#AEBACE;
}
.topbar__links{
  display:flex;
  align-items:center;
  gap:24px;
}
.topbar__links a{
  color:#E7ECF4;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-weight:500;
}
.topbar__links a:hover{ color:#fff; }
.topbar__links a span{ color:var(--peach); }

/* ---------- site header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(251,252,254,.82);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--border);
}
.site-header__row{
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
  height:74px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{
  display:flex;
  align-items:center;
  gap:13px;
  background:none;
  border:none;
  cursor:pointer;
  padding:0;
  font-family:inherit;
  text-decoration:none;
}
.brand img{
  width:51px;
  height:51px;
  display:block;
}
.brand__name{
  font-family:var(--font-heading);
  font-weight:600;
  font-size:21px;
  color:var(--navy);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.site-nav{
  display:flex;
  align-items:center;
  gap:6px;
}
.site-nav__link{
  text-decoration:none;
  display:inline-block;
  background:none;
  border:none;
  border-bottom:2px solid transparent;
  cursor:pointer;
  font-family:inherit;
  font-size:15px;
  font-weight:500;
  color:#5C6B82;
  padding:8px 14px 7px;
  border-radius:2px;
}
.site-nav__link.is-active{
  color:var(--navy);
  border-bottom-color:var(--orange);
}
.nav-dropdown{
  position:relative;
}
.nav-dropdown__trigger{
  background:none;
  border:none;
  border-bottom:2px solid transparent;
  cursor:pointer;
  font-family:inherit;
  font-size:15px;
  font-weight:500;
  color:#5C6B82;
  padding:8px 14px 7px;
  border-radius:2px;
  display:inline-flex;
  align-items:center;
  gap:5px;
}
.nav-dropdown__trigger.is-active{
  color:var(--navy);
  border-bottom-color:var(--orange);
}
.nav-dropdown__arrow{
  font-size:10px;
  display:inline-block;
  transition:transform .18s;
}
.nav-dropdown.is-open .nav-dropdown__arrow{
  transform:rotate(180deg);
}
.nav-dropdown__panel{
  position:absolute;
  top:100%;
  left:0;
  margin-top:10px;
  background:#fff;
  border:1px solid var(--border-2);
  border-radius:var(--r-3xl);
  box-shadow:var(--shadow-card-lg);
  padding:8px;
  min-width:280px;
  z-index:60;
}
.nav-dropdown__item{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:2px;
  width:100%;
  text-align:left;
  background:none;
  border:none;
  cursor:pointer;
  font-family:inherit;
  padding:10px 13px;
  border-radius:var(--sm, 9px);
  text-decoration:none;
}
.nav-dropdown__item:hover{ background:var(--bg-soft); }
.nav-dropdown__item-label{
  font-family:var(--font-heading);
  font-size:14px;
  font-weight:600;
  color:var(--navy);
}
.nav-dropdown__item-desc{
  font-size:12px;
  color:var(--muted);
}
.nav-cta{
  margin-left:14px;
  display:inline-flex;
  align-items:center;
  gap:9px;
  background:var(--orange-a11y);
  color:#fff;
  border:none;
  cursor:pointer;
  font-family:inherit;
  font-weight:600;
  font-size:15px;
  padding:11px 20px;
  border-radius:var(--r-xl);
  box-shadow:var(--shadow-btn-orange-sm);
  text-decoration:none;
}
.nav-cta:hover{ background:var(--orange-hover); }

/* ---------- mobile menu toggle (hamburger, hidden on desktop by default) ---------- */
.menu-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:6px;
  width:44px;
  height:44px;
  padding:0;
  background:none;
  border:none;
  cursor:pointer;
  flex:none;
  border-radius:var(--r-md);
}
.menu-toggle:active{ background:var(--bg-soft); }
.menu-toggle__bar{
  display:block;
  width:24px;
  height:2px;
  background:var(--navy);
  border-radius:2px;
  transition:transform .22s cubic-bezier(.4,0,.2,1), opacity .22s cubic-bezier(.4,0,.2,1);
}
.site-header.is-menu-open .menu-toggle__bar:nth-child(1){ transform:translateY(8px) rotate(45deg); }
.site-header.is-menu-open .menu-toggle__bar:nth-child(2){ opacity:0; }
.site-header.is-menu-open .menu-toggle__bar:nth-child(3){ transform:translateY(-8px) rotate(-45deg); }

/* ---------- grids ---------- */
.grid{ display:grid; gap:20px; }
.grid-2{ grid-template-columns:repeat(2,1fr); }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }

/* ---------- footer ---------- */
.site-footer{
  background-color:#15305C;
  background-image:var(--navy-gradient);
  color:#fff;
  border-top:1px solid var(--navy-panel-border-2);
}
.site-footer__grid{
  max-width:1200px;
  margin:0 auto;
  padding:56px 40px 36px;
  display:grid;
  grid-template-columns:minmax(220px,.85fr) 2.7fr;
  gap:48px;
}
.site-footer__identity{ max-width:300px; }
.site-footer__nav{
  display:grid;
  /* colonnes dimensionnées à leur contenu : avec des tracks 1fr, une colonne
     aux libellés courts (Navigation) laisse un grand vide avant la colonne
     suivante alors qu'une colonne aux libellés longs colle presque au gap —
     l'écart visuel perçu variait donc d'une colonne à l'autre malgré un gap
     identique. minmax(0,max-content) fait que l'espace visible entre deux
     colonnes est partout égal au gap. */
  grid-template-columns:repeat(4,minmax(0,max-content));
  justify-content:space-between;
  gap:28px;
}
.site-footer__col{ min-width:0; }
.site-footer__logo{
  margin-bottom:18px;
}
.site-footer__logo img{
  height:77px;
  width:auto;
  max-width:100%;
  display:block;
}
.site-footer__desc{
  font-size:14.5px;
  line-height:1.6;
  color:var(--muted-3);
  margin:0 0 18px;
  max-width:320px;
}
.site-footer__cta{
  display:inline-flex;
  align-items:center;
  gap:9px;
  background:var(--orange-a11y);
  color:#fff;
  border:none;
  cursor:pointer;
  font-family:inherit;
  font-weight:600;
  font-size:14.5px;
  padding:12px 20px;
  border-radius:var(--r-xl);
  text-decoration:none;
}
.site-footer__cta:hover{ background:var(--orange-hover); }
.site-footer__heading{
  font-size:13px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.1em;
  color:var(--orange);
  margin-bottom:16px;
}
.site-footer__links{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.site-footer__links a{
  text-decoration:none;
  background:none;
  border:none;
  cursor:pointer;
  font-family:inherit;
  text-align:left;
  font-size:14.5px;
  color:#AEBACE;
  padding:0;
}
.site-footer__links a:hover{ color:#fff; }
.site-footer__contact{
  display:flex;
  flex-direction:column;
  gap:11px;
  font-size:14.5px;
  color:#AEBACE;
}
.site-footer__contact-name{
  color:#fff;
  font-weight:600;
}
.site-footer__contact a{
  color:#AEBACE;
  text-decoration:none;
}
.site-footer__contact a:hover{ color:#fff; }
.site-footer__bottom{
  max-width:1200px;
  margin:0 auto;
  padding:22px 40px;
  border-top:1px solid var(--navy-panel-border-2);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
.site-footer__bottom span{
  font-size:13px;
  color:#AEBACE;
}
.site-footer__bottom span a{
  color:inherit;
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.site-footer__bottom span a:hover,
.site-footer__bottom span a:focus-visible{ color:#fff; border-bottom-color:rgba(255,255,255,.5); }

/* ==================== responsive ==================== */
@media (max-width:1100px){
  .site-header__row{
    height:auto;
    flex-wrap:wrap;
    padding-top:12px;
    padding-bottom:12px;
    gap:10px;
  }
  .site-nav{
    width:100%;
    flex-wrap:wrap;
    justify-content:flex-start;
    gap:4px;
  }
  .site-nav__link,.nav-dropdown__trigger{
    padding:8px 10px;
    font-size:14px;
  }
  .nav-cta{ margin-left:auto; }
}

@media (max-width:900px){
  .grid-2,.grid-3,.grid-4{
    grid-template-columns:1fr;
  }
  .site-footer__grid{
    grid-template-columns:1fr;
    gap:36px;
  }
  .site-footer__identity{ max-width:420px; margin:0 auto; text-align:center; }
  /* .site-footer__logo est un simple <div> déjà pleine largeur : ces marges
     auto n'avaient aucun effet. L'image, elle, est en display:block — sur
     laquelle text-align:center (hérité) ne s'applique pas non plus — d'où le
     logo resté collé à gauche malgré le reste du bloc centré. */
  .site-footer__logo img{ margin-left:auto; margin-right:auto; }
  .site-footer__desc{ margin-left:auto; margin-right:auto; }
  .site-footer__nav{ grid-template-columns:repeat(2,1fr); gap:32px 24px; }
  .site-footer__bottom{ justify-content:center; text-align:center; }
}

/* ---------- menu mobile/tablette : le nav desktop devient un panneau déroulant ---------- */
@media (max-width:1024px){
  .menu-toggle{ display:inline-flex; }

  .site-header__row{
    height:74px;
    flex-wrap:nowrap;
    padding-top:0;
    padding-bottom:0;
  }

  .site-nav{
    position:absolute;
    top:100%;
    right:0;
    left:auto;
    width:100%;
    max-width:460px;
    max-height:calc(100vh - 74px);
    overflow-y:auto;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:#fff;
    border-radius:0 0 var(--r-4xl) var(--r-4xl);
    box-shadow:var(--shadow-card-lg);
    padding:8px 24px 24px;
    transform-origin:top right;
    transform:translateY(-6px) scale(.98);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .22s cubic-bezier(.4,0,.2,1), transform .22s cubic-bezier(.4,0,.2,1), visibility 0s .22s;
  }
  .site-header.is-menu-open .site-nav{
    transform:translateY(0) scale(1);
    visibility:visible;
    opacity:1;
    pointer-events:auto;
    transition:opacity .22s cubic-bezier(.4,0,.2,1), transform .22s cubic-bezier(.4,0,.2,1), visibility 0s;
  }

  .site-nav__link,.nav-dropdown__trigger{
    width:100%;
    justify-content:space-between;
    padding:15px 2px;
    font-size:16px;
    border-bottom:1px solid var(--border);
    border-radius:0;
  }
  .nav-dropdown{ width:100%; }
  .nav-dropdown__panel{
    position:static;
    box-shadow:none;
    border:none;
    margin-top:0;
    padding:4px 0 12px 10px;
    min-width:0;
  }
  .nav-cta{
    margin:18px 0 4px;
    width:100%;
    justify-content:center;
    padding:15px 20px;
  }

  .btn,.nav-cta,.site-footer__cta{ transition:transform .12s cubic-bezier(.4,0,.2,1); }
  .btn:active,.nav-cta:active,.site-footer__cta:active{ transform:scale(.97); }
}

@media (max-width:640px){
  /* certaines sections définissent un padding inline (desktop) qui, sans !important,
     conserverait ses 40px latéraux même sur mobile : on force ici 20px partout,
     sans toucher aux valeurs verticales propres à chaque section. */
  .section{ padding-left:20px !important; padding-right:20px !important; padding-top:52px; padding-bottom:20px; }
  .container,.topbar__inner,.site-header__row{ padding-left:20px; padding-right:20px; }
  .topbar__inner{
    height:auto;
    flex-wrap:wrap;
    padding-top:7px;
    padding-bottom:7px;
    gap:4px 16px;
    font-size:12px;
  }
  .brand img{ width:40px; height:40px; }
  .brand{ gap:10px; }
  .brand__name{ font-size:18px; }
  .site-nav{ padding:8px 20px 20px; }
  .site-footer__grid{ padding:44px 20px 30px; gap:32px; }
  .site-footer__nav{ grid-template-columns:1fr; gap:30px; text-align:center; }
  .site-footer__links,.site-footer__contact{ align-items:center; }
  .site-footer__bottom{ padding:18px 20px; gap:10px; }
  .site-footer__links a{ padding:9px 0; display:inline-block; }
  .site-footer__links{ gap:2px; }
  .site-footer__contact > *{ padding:5px 0; }
  .site-footer__contact{ gap:1px; }
}