@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

:root{
  --bg: #f4f6fb;
  --bg-soft: #e2ebfb;
  --card: #ffffff;
  --text: #1f2430;
  --text-soft: #6c7282;
  --accent: #0f4c81;
  --accent-strong: #0b3560;
  --accent-soft: #edf3ff;
  --border: rgba(15, 28, 57, 0.14);
  --radius: 14px;
  --shadow: 0 12px 30px rgba(15, 28, 57, 0.12);
}

*{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(15,76,129,0.12) 0, transparent 55%),
    radial-gradient(circle at bottom right, rgba(136,166,223,0.16) 0, transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.6;
}

.hidden{
  display:none !important;
}

.container{
  width:min(1150px, 92vw);
  margin-inline:auto;
}

/* HEADER */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(244,246,251,0.96);
  backdrop-filter: blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:10px 0;
  flex-wrap:wrap;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:inherit;
  text-decoration:none;
}
.brand-logo{
  max-height:56px;
  width:auto;
  object-fit:contain;
  border-radius:8px;
  border:1px solid var(--border);
  background:#fff;
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.1;
}
.brand-name{
  font-weight:700;
  letter-spacing:0.2px;
}
.brand-sub{
  font-size:0.85rem;
  color:var(--text-soft);
}

.nav{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-end;
}
.nav a{
  color:var(--text-soft);
  text-decoration:none;
  font-weight:500;
  font-size:0.9rem;
  padding:6px 10px;
  border-radius:999px;
  transition: background .15s ease, color .15s ease;
}
.nav a:hover{
  color:#ffffff;
  background:var(--accent);
}

.lang-toggle{
  background:#ffffff;
  color:var(--accent-strong);
  border:1px solid var(--border);
  padding:7px 13px;
  border-radius:999px;
  cursor:pointer;
  font-weight:600;
  font-size:0.9rem;
  transition: background .15s ease, transform .15s ease, box-shadow .15s ease;
}
.lang-toggle:hover{
  background:#e5ebf5;
  transform:translateY(-1px);
  box-shadow:0 6px 16px rgba(15,28,57,0.15);
}

/* HERO */
.hero{
  position:relative;
  padding:80px 0 60px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:-10% -10% auto -10%;
  height:520px;
  background:
    radial-gradient(900px 480px at 10% 10%, rgba(15,76,129,0.22), transparent 60%),
    radial-gradient(700px 420px at 90% 20%, rgba(60,120,200,0.2), transparent 60%),
    linear-gradient(to bottom, #f4f6fb, transparent);
  pointer-events:none;
}
.hero-inner{
  display:grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap:24px;
  align-items:center;
  position:relative;
}
.hero h1{
  font-size:clamp(2rem, 3.2vw, 3rem);
  line-height:1.1;
  margin:0 0 12px;
  color:var(--accent-strong); /* texte foncé */
  text-shadow:none;
}
.hero-lead{
  color:var(--text); /* texte foncé */
  font-size:clamp(1rem, 1.3vw, 1.12rem);
  max-width:58ch;
}
.hero-badges{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:18px 0 22px;
}
.hero-badges span{
  font-size:0.9rem;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,0.35);
  background:rgba(4,30,70,0.6);
  color:#f4f7ff;
}

.hero-cta{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 16px;
  border-radius:999px;
  text-decoration:none;
  font-weight:600;
  border:1px solid transparent;
  transition: transform .15s ease, background .2s ease, border .2s ease, box-shadow .2s ease;
  cursor:pointer;
  font-size:0.95rem;
}

.btn-primary{
  background:#ffffff;
  color:var(--accent-strong);
  border-color:transparent;
  box-shadow:0 10px 20px rgba(4,30,70,0.35);
}
.btn-primary:hover{
  transform:translateY(-1px);
  background:var(--accent-soft);
}

.btn-ghost{
  background:rgba(4,30,70,0.12);
  color:#ffffff;
  border-color:rgba(255,255,255,0.4);
}
.btn-ghost:hover{
  transform:translateY(-1px);
  background:rgba(4,30,70,0.22);
}

.hero-card{
  background:rgba(255,255,255,0.92);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}
.hero-card h3{
  margin-top:0;
  color:var(--accent-strong);
}

/* SECTIONS */
.section{
  padding:60px 0;
}
.section-alt{
  background:linear-gradient(135deg, var(--bg-soft), #f4f6fb);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}

.section-header{
  margin-bottom:22px;
}
.section-header h2{
  font-size:clamp(1.6rem, 2.3vw, 2.1rem);
  margin:0 0 8px;
  color:var(--accent-strong);
}
.section-header p{
  color:var(--text-soft);
  max-width:70ch;
}

/* GRID / CARDS */
.grid{
  display:grid;
  gap:14px;
}
.services-grid{
  grid-template-columns: repeat(3, 1fr);
}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}
.card h3{
  margin-top:0;
  color:var(--accent-strong);
}

/* PROJECTS */
.projects{
  display:grid;
  gap:18px;
}
.project-card{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:16px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:14px;
  box-shadow:var(--shadow);
}
.project-gallery{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:8px;
}
.project-gallery img{
  width:100%;
  height:140px;
  object-fit:cover;
  border-radius:10px;
  border:1px solid var(--border);
  transition: transform .25s ease, filter .25s ease, box-shadow .25s ease;
  will-change: transform;
}
.project-gallery img:hover{
  transform: scale(1.05);
  filter: brightness(1.05);
  box-shadow:0 8px 18px rgba(15,28,57,0.25);
}
.project-content h3{
  margin-top:4px;
  color:var(--accent-strong);
}
.project-content ul{
  padding-left:18px;
  margin:8px 0 0;
}
.project-content li{
  margin-bottom:6px;
  color:var(--text-soft);
}
.project-meta{
  margin:4px 0 8px;
  font-size:0.9rem;
  color:var(--text-soft);
  font-style:italic;
}

/* TEAM */
.team-grid{
  grid-template-columns: repeat(2, 1fr);
}
.team-card{
  display:grid;
  grid-template-columns: 160px 1fr;
  gap:14px;
  align-items:center;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:14px;
  box-shadow:var(--shadow);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.team-card:hover{
  transform: translateY(-3px);
  border-color: rgba(15,76,129,0.3);
  box-shadow:0 16px 32px rgba(15,28,57,0.25);
}
.team-photo{
  width:160px;
  height:160px;
  border-radius:12px;
  overflow:hidden;
  border:1px solid var(--border);
  background:#d8dde8;
}
.team-photo img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition: transform .35s ease, filter .35s ease;
  will-change: transform;
}
.team-card:hover .team-photo img{
  transform: scale(1.06);
  filter: brightness(1.04);
}
.team-info h3{
  margin:0 0 4px;
  color:var(--accent-strong);
}
.team-role{
  margin:0 0 8px;
  font-weight:600;
  color:var(--accent);
  font-size:0.98rem;
}
.team-info p{
  margin:0;
  color:var(--text-soft);
}

/* ABOUT */
.about{
  display:grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap:16px;
}
.about-highlight{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}
.about-highlight h3{
  margin-top:0;
  color:var(--accent-strong);
}
.trust-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
  margin-top:14px;
}
.trust-item{
  padding:12px;
  border:1px dashed var(--border);
  border-radius:12px;
  background:#f7f9ff;
}
.trust-label{
  font-size:.85rem;
  color:var(--text-soft);
  display:block;
}
.trust-value{
  font-weight:600;
  color:var(--accent-strong);
}

/* PROCESS */
.process-grid{
  grid-template-columns: repeat(4, 1fr);
}
.step{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  position:relative;
  box-shadow:var(--shadow);
}
.step-num{
  width:36px;
  height:36px;
  border-radius:10px;
  display:grid;
  place-items:center;
  font-weight:700;
  background:#e2ebfb;
  border:1px solid var(--border);
  margin-bottom:8px;
  color:var(--accent-strong);
}
.step h3{
  margin:0 0 6px;
  color:var(--accent-strong);
}
.step p{
  margin:0;
  color:var(--text-soft);
}

/* CONTACT */
.contact{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:16px;
}
.contact-card,
.form-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}
.contact-card h2{
  margin-top:0;
  color:var(--accent-strong);
}
.contact-list{
  display:grid;
  gap:10px;
  margin-top:12px;
}
.contact-list .label{
  display:block;
  font-size:.85rem;
  color:var(--text-soft);
}
.contact-list a{
  color:var(--accent-strong);
  text-decoration:none;
}
.contact-list a:hover{
  text-decoration:underline;
}

form label{
  display:grid;
  gap:6px;
  margin-bottom:10px;
}
form h3{
  margin-top:0;
  color:var(--accent-strong);
}
input,
select,
textarea{
  width:100%;
  padding:11px 12px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#ffffff;
  color:var(--text);
  outline:none;
  font-family:inherit;
  font-size:0.95rem;
}
input:focus,
select:focus,
textarea:focus{
  border-color:rgba(15,76,129,0.6);
  box-shadow:0 0 0 1px rgba(15,76,129,0.12);
}

/* FOOTER */
.footer{
  border-top:1px solid var(--border);
  padding:18px 0;
  background:linear-gradient(135deg, #dfe8fb, #f4f6fb);
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  color:var(--text-soft);
  font-size:.95rem;
  flex-wrap:wrap;
}
.to-top{
  color:var(--accent-strong);
  text-decoration:none;
  font-weight:500;
}
.to-top:hover{
  text-decoration:underline;
}

/* LIGHTBOX */
.lightbox{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.45);
  display:none;
  align-items:center;
  justify-content:center;
  z-index:100;
}
.lightbox.active{
  display:flex;
}
.lightbox-inner{
  max-width:25vw;  /* environ 1/4 de la largeur de l’écran sur desktop */
  max-height:70vh;
  background:#ffffff;
  padding:10px;
  border-radius:14px;
  box-shadow:0 18px 45px rgba(0,0,0,0.4);
}
.lightbox-inner img{
  display:block;
  max-width:100%;
  max-height:100%;
  border-radius:10px;
}

/* Responsive lightbox */
@media (max-width: 900px){
  .lightbox-inner{
    max-width:90vw;
    max-height:80vh;
  }
}

/* PAGE MERCI / ERREUR FORMULAIRE */
.thankyou-body{
  margin:0;
  font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(15,76,129,0.12) 0, transparent 55%),
    radial-gradient(circle at bottom right, rgba(136,166,223,0.16) 0, transparent 55%),
    var(--bg);
  color:var(--text);
}

.thankyou-wrapper{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
}

.thankyou-card{
  max-width:460px;
  width:100%;
  background:var(--card);
  border-radius:var(--radius);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  padding:24px 22px;
  text-align:center;
}

.thankyou-card h1{
  margin-top:0;
  margin-bottom:10px;
  font-size:1.8rem;
  color:var(--accent-strong);
}

.thankyou-card p{
  margin-top:0;
  margin-bottom:18px;
  color:var(--text-soft);
}

/* RESPONSIVE */
@media (max-width: 980px){
  .hero-inner{
    grid-template-columns:1fr;
  }
  .services-grid{
    grid-template-columns: repeat(2, 1fr);
  }
  .project-card{
    grid-template-columns:1fr;
  }
  .about{
    grid-template-columns:1fr;
  }
  .process-grid{
    grid-template-columns: repeat(2, 1fr);
  }
  .contact{
    grid-template-columns:1fr;
  }
  .team-grid{
    grid-template-columns:1fr;
  }
  .team-card{
    grid-template-columns: 140px 1fr;
  }
  .team-photo{
    width:140px;
    height:140px;
  }
}

@media (max-width: 768px){
  .header-inner{
    flex-direction:column;
    align-items:flex-start;
  }
  .nav{
    width:100%;
  }
}

@media (max-width: 560px){
  .services-grid{
    grid-template-columns:1fr;
  }
  .project-gallery{
    grid-template-columns: repeat(2, 1fr);
  }
  .project-gallery img{
    height:120px;
  }
  .process-grid{
    grid-template-columns:1fr;
  }
  .team-card{
    grid-template-columns:1fr;
    text-align:center;
  }
  .team-photo{
    width:180px;
    height:180px;
    margin:0 auto;
  }
}