/* Front-facing base styles and layout */
:root{
  --bg:#0b0f19;
  --fg:#e6e9f2;
  --muted:#9aa3b2;
  --accent:#6dd6ff;
  --accent2:#4ffcaa;
  --surface:#121727;
  --panel:#0f1524;
  --border:#1a2033;
  --radius:16px;
  --font:Inter, "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  --heading-font:Inter, "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:radial-gradient(1200px 800px at 70% 30%, rgba(109,214,255,.12), rgba(0,0,0,0) 55%), var(--bg);
  color:var(--fg);
  font-family:var(--font, ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Arial);
}
a{color:inherit}
.skip{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip:focus{left:16px;top:12px;width:auto;height:auto;background:#000;color:#fff;padding:8px 12px;border-radius:8px;z-index:9999}

/* Calque particules plein ecran */
#particles-js{position:fixed;inset:0;z-index:-1;pointer-events:none}

.container{width:min(1100px, 92%);margin-inline:auto}
/* Header */
.site-header{position:sticky;top:0;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);background:linear-gradient(180deg, rgba(7,7,16,.85), rgba(7,7,16,.25) 60%, transparent);z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-family:var(--heading-font, var(--font))}
.brand .logo{width:28px;height:28px;border-radius:10px;background:var(--panel);display:grid;place-items:center;box-shadow:0 2px 8px rgba(0,0,0,.4);border:1px solid var(--border)}
.brand .logo:before{content:"";width:14px;height:14px;background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:50%}

/* NAV desktop */
.nav{display:flex;gap:22px;align-items:center}
.nav a{position:relative;text-decoration:none;opacity:.95;padding:8px 2px;font-family:var(--heading-font, var(--font))}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;transform:scaleX(0);transform-origin:0 50%;transition:transform .25s ease;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.nav a:hover::after,.nav a:focus-visible::after,.nav a.active::after{transform:scaleX(1)}
.nav .btn{padding:10px 14px;border-radius:12px;background:var(--surface);box-shadow:inset 0 1px 0 rgba(255,255,255,.06);border:1px solid var(--border)}

/* NAV mobile */
.nav-toggle{display:none;position:relative;isolation:isolate;background:var(--surface);border:0;color:var(--fg);padding:10px 12px;border-radius:10px}
.nav-toggle .bars{width:20px;height:12px;position:relative;display:inline-block}
.nav-toggle .bars::before,.nav-toggle .bars::after,.nav-toggle .bar{content:"";position:absolute;left:0;right:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.nav-toggle .bar{top:5px}
.nav-toggle .bars::before{top:0}
.nav-toggle .bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bars::after{transform:translateY(-5px) rotate(-45deg)}
.nav-toggle[aria-expanded="true"] .bar{transform:scaleX(0)}

@media (max-width:800px){
  .nav-toggle{display:inline-flex;align-items:center;gap:8px}
  /* Mobile menu drops in the flow (no overlay) */
  .nav{display:none;position:static;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:12px 16px;flex-direction:column;min-width:auto;margin-top:10px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
  .nav a{padding:10px 2px}
  .nav[aria-expanded="true"]{display:flex}
}

/* Hero */
.hero{padding:120px 0 80px;text-align:center}
.hero h1{font-size:clamp(32px,6vw,64px);line-height:1.05;margin:0 0 12px;font-family:var(--heading-font, var(--font))}
.lead{font-size:clamp(16px,2.2vw,20px);color:var(--muted);margin:0 auto 24px;max-width:860px}
.cta-row{display:flex;gap:12px;justify-content:center}
.btn{display:inline-block;text-decoration:none;border:1px solid var(--border);background:linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));padding:12px 18px;border-radius:var(--radius);color:var(--fg);box-shadow:0 10px 30px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.06)}
.btn.ghost{background:transparent;border:1px solid var(--border)}

/* Sections */
.section{padding:64px 0}
.section h2{font-size:clamp(22px,4vw,32px);margin:0 0 24px;font-family:var(--heading-font, var(--font))}
.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;min-height:140px;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.portfolio{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.tile{display:flex;flex-direction:column;text-decoration:none;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.tile-img{height:140px;background:linear-gradient(135deg, var(--accent) 0%, var(--accent2) 70%), radial-gradient(600px 240px at 70% 30%, rgba(255,255,255,.08), transparent 60%), #0a0f1e; background-size:cover; background-position:center}
.tile span{padding:12px 14px;color:var(--muted)}
/* Articles */
.posts{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.post .post-body{padding:12px 14px;display:grid;gap:6px}
.post strong{font-weight:700;font-family:var(--heading-font, var(--font))}
.post .post-meta{color:var(--muted)}
/* Home Articles (stories style) */
.stories{grid-template-columns:repeat(12,1fr);gap:16px}
@media(min-width:720px){.stories{gap:18px}}
@media(min-width:960px){.stories{gap:20px}}
.story{grid-column:span 12;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;box-shadow:0 10px 30px rgba(0,0,0,.2)}
@media(min-width:720px){.story{grid-column:span 6}}
@media(min-width:1024px){.story{grid-column:span 4}}
.story-link{display:flex;flex-direction:column;text-decoration:none;color:inherit;height:100%}
.story-img{aspect-ratio:16/10;background:var(--panel);background-size:cover;background-position:center;border-bottom:1px solid var(--border)}
.story-body{padding:16px 16px 18px;display:grid;gap:8px}
.story-meta{font-size:12px;letter-spacing:.04em;color:var(--muted);text-transform:uppercase;display:flex;align-items:center;gap:8px}
.story-chip{display:inline-block;padding:2px 6px;border-radius:999px;background:var(--surface);border:1px solid var(--border)}
.story-title{font-size:clamp(16px,2.2vw,20px);margin:0;font-family:var(--heading-font, var(--font))}
.story-excerpt{margin:0;color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;counter-reset:s}
.steps li{list-style:none;background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:14px;position:relative}
.steps li:before{counter-increment:s;content:counter(s);position:absolute;top:10px;right:12px;font-size:12px;color:var(--muted)}

/* Contact */
.contact{display:grid;gap:12px}
.contact .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.contact .row.end{align-items:center;grid-template-columns:1fr auto}
label{display:grid;gap:6px;font-size:14px;color:var(--muted)}
input,textarea{padding:12px 12px;border-radius:12px;border:1px solid var(--border);background:var(--panel);color:var(--fg)}
.checkbox{display:flex;align-items:center;gap:8px}
#form-status{font-size:14px;color:var(--muted)}

/* Footer */
.site-footer{padding:24px 0;color:var(--muted);opacity:.9}