:root{
  --fond:#0b0f18;
  --fond2:#0f1628;
  --texte:#eaf0ff;
  --texte-gris:rgba(234,240,255,.72);
  --bordure:rgba(234,240,255,.12);
  --couleur-accent: rgb(99, 99, 99);

  --accent-cyan:#22d3ee;
  --accent-violet:#7c3aed;
  --accent-rose:#fb7185;

  --arrondi:18px;
  --arrondi2:26px;
}

html, body{ height:100%; }

body{
  min-height:100vh;
  display:flex;
  flex-direction:column;

  padding-top:70px;
  background: var(--fond);
  color: var(--texte);
  overflow-x:hidden;
  line-height: 1.6;
}

.section-pad{
  padding: 110px 0;
}

.text-soft{ color: var(--texte-gris); }

#mainNav{
  background: rgba(11,15,24,.90);
  border-bottom: 1px solid var(--bordure);
  backdrop-filter: blur(10px);
}

#mainNav .navbar-brand{
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}

#mainNav .nav-link{
  font-weight: 800;
  opacity: .85;
  padding-top: .9rem;
  padding-bottom: .9rem;
}

#mainNav .nav-link:hover{ opacity: 1; }

.hero{
  position:relative;
  min-height: calc(100vh - 70px);
  overflow:hidden;
  border-bottom: 1px solid var(--bordure);
}

.hero-video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  z-index: 0;
}

.hero-overlay{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  background: rgba(0,0,0,.18);
}

.hero-content{
  position: relative;
  z-index: 2;
  padding: 50px 20px;
}

h2{
  font-weight: 900;
  letter-spacing: .01em;
}

.lead{
  opacity: .95;
}

.card{
  border-radius: var(--arrondi);
  border: 1px solid var(--bordure);
  background: rgba(255,255,255,.04);
  box-shadow: 0 18px 55px rgba(0,0,0,.40);
}

.card-body{
  padding: 34px;
}

.card h5{
  font-weight: 900;
  margin-bottom: 10px;
}

.card p{
  margin-bottom: 18px;
}

.card-img-top {
  height: 180px;
  object-fit: cover;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.nav-tabs{
  border-bottom: 1px solid var(--bordure);
  margin-bottom: 18px;
}

.nav-tabs .nav-link{
  color: var(--texte-gris);
  font-weight: 900;
  letter-spacing: .02em;
  border: 1px solid transparent;
}

.nav-tabs .nav-link:hover{
  color: var(--texte);
  border-color: rgba(234,240,255,.10);
}

.nav-tabs .nav-link.active{
  color: var(--texte);
  background: rgba(255,255,255,.05);
  border-color: var(--bordure) var(--bordure) transparent;
}

.btn{
  border-radius: 14px;
}

.btn-primary{
  border: 1px solid rgba(234,240,255,.16);
  background: rgba(255,255,255,.10);
  color: var(--texte);
  font-weight: 900;
  letter-spacing: .03em;
}

.btn-primary:hover{
  background: rgba(255,255,255,.16);
  color: var(--texte);
}

.btn-dark{
  border: 1px solid rgba(34,211,238,.45);
  background: rgba(34,211,238,.12);
  color: var(--texte);

  font-weight: 900;
  letter-spacing: .06em;
  text-transform: uppercase;

  padding: 12px 20px;
}

.btn-dark:hover{
  background: rgba(34,211,238,.18);
  color: var(--texte);
}

.section-contact {
  display: flex;
  align-items: center;
  padding-top: 230px;
  padding-bottom: 60px;
}

.section-contact::before{
  content:"";
  position:absolute;
  inset:0;
  background: rgba(11,15,24,.75);
  z-index: 1;
  pointer-events: none;
}

.section-contact .container{
  position: relative;
  z-index: 2;
}

.section-contact .card{
  border-radius: var(--arrondi2);
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(234,240,255,.14);
  backdrop-filter: blur(10px);
}

.section-contact label{
  font-weight: 900;
  margin-bottom: 10px;
}

.section-contact .form-control{
  border-radius: 14px;
  background: rgba(11,15,24,.62);
  border: 1px solid rgba(234,240,255,.14);
  color: var(--texte);
  padding: 12px 14px;
  height: auto;
}

.section-contact .form-control::placeholder{
  color: rgba(234,240,255,.42);
}

.section-contact .form-control:focus{
  background: rgba(11,15,24,.78);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(34,211,238,.15);
  color: var(--texte);
}

.section-contact .form-group{ margin-bottom: 24px; }

.section-contact .form-control.is-valid{
  border-color: var(--accent-cyan)!important;
  box-shadow: 0 0 0 3px rgba(34,211,238,.12);
}

.section-contact .form-control.is-invalid{
  border-color: var(--accent-rose)!important;
  box-shadow: 0 0 0 3px rgba(251,113,133,.12);
}

.invalid-feedback{ font-weight: 700; }

#formOk{
  border: 1px solid rgba(34,211,238,.35);
  background: rgba(34,211,238,.08);
  color: rgba(234,240,255,.95);
}

.chat-module{
  margin-top: 10px;
}

.chat-box{
  height: 300px;
  overflow-y: auto;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--bordure);
  background: rgba(11,15,24,.45);
  margin-bottom: 18px;
}

.chat-box .message{
  padding: 10px 12px;
  border-radius: 12px;
  margin-bottom: 10px;

  background: rgba(255,255,255,.04);
  border: 1px solid rgba(234,240,255,.08);
}

.chat-box .message strong{
  color: var(--accent-cyan);
}

.chat-module .form-control{
  background: rgba(11,15,24,.62);
  border: 1px solid rgba(234,240,255,.14);
  color: var(--texte);
}

.footer{
  margin-top: auto;
  background: rgba(8,10,16,.90);
  border-top: 1px solid var(--bordure);
  padding: 26px 0;
}

.footer .nav-link{
  color: var(--texte-gris);
  font-weight: 800;
  padding-top: .35rem;
  padding-bottom: .35rem;
}

.footer .nav-link:hover{
  color: var(--texte);
}

@media (max-width:576px){
  .hero{ min-height: 78vh; }

  .section-pad{ padding: 70px 0; }
  .section-contact{ padding: 70px 0; }

  .card-body{ padding: 22px;}
  .hero-content{ padding: 34px 12px; }

  .chat-box{ height: 260px; }
}