/* Linux4All — feuille de style maquette PHP
   Couleurs de marque : bleu #003399, bleu sombre #002266, jaune CTA #FFD700
*/
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root{
  --brand-blue:#003399;
  --brand-blue-dark:#002266;
  --brand-blue-light:#3a6fd1;
  --brand-yellow:#FFD700;
  --brand-orange:#f97316;
  --brand-green:#3aa04a;
  --brand-red:#e0463d;
  --bg:#ffffff;
  --fg:#1a2030;
  --muted:#5b6577;
  --border:#e4e7ee;
  --card:#ffffff;
  --radius:.75rem;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Space Grotesk','Inter',system-ui,sans-serif;
  color:var(--fg);
  background:var(--bg);
  line-height:1.55;
}
img{max-width:100%;display:block}
a{color:var(--brand-blue);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1100px;margin:0 auto;padding:0 1.25rem}
.muted{color:var(--muted)}
.text-center{text-align:center}

/* Header / nav */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(6px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:.85rem 1.25rem;gap:1rem}
.brand img{height:42px}
.nav-links{display:flex;align-items:center;gap:1.25rem}
.nav-links a{color:var(--fg);font-weight:500;font-size:.95rem}
.nav-links a.active{color:var(--brand-blue);font-weight:700}
.nav-links a.cta{background:var(--brand-yellow);color:var(--brand-blue-dark);padding:.5rem 1rem;border-radius:.5rem;font-weight:700}
.nav-links a.cta:hover{filter:brightness(1.08);text-decoration:none}
.nav-toggle{display:none}
.nav-burger{display:none;font-size:1.6rem;cursor:pointer;color:var(--brand-blue)}

.brand-stripe{height:4px;background:linear-gradient(90deg,
  var(--brand-green) 0 20%,
  var(--brand-blue-light) 20% 40%,
  var(--brand-orange) 40% 60%,
  var(--brand-yellow) 60% 80%,
  var(--brand-red) 80% 100%)}

/* Hero */
.hero{
  background:linear-gradient(145deg,var(--brand-blue-dark) 0%,var(--brand-blue) 55%,var(--brand-blue-light) 100%);
  color:#fff;padding:3.5rem 0;
}
.hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:2.5rem;align-items:center}
.hero h1{font-size:clamp(1.8rem,4vw,2.8rem);margin:0 0 1rem;line-height:1.15}
.hero p.lead{font-size:1.15rem;opacity:.92;margin:0 0 1.5rem}
.hero img{max-height:340px;margin:0 auto;filter:drop-shadow(0 10px 30px rgba(0,0,0,.25))}

/* Buttons */
.btn-cta{display:inline-block;background:var(--brand-yellow);color:var(--brand-blue-dark);
  font-weight:700;padding:.85rem 1.5rem;border-radius:.5rem;border:0;cursor:pointer;
  box-shadow:0 4px 14px rgba(0,0,0,.12);transition:transform .15s,filter .15s;text-decoration:none}
.btn-cta:hover{transform:translateY(-2px);filter:brightness(1.08);text-decoration:none}
.btn-primary{display:inline-block;background:var(--brand-blue);color:#fff;font-weight:600;
  padding:.75rem 1.25rem;border-radius:.5rem;text-decoration:none}
.btn-primary:hover{background:var(--brand-blue-dark);text-decoration:none}

/* Sections */
section{padding:3rem 0}
section h2{font-size:clamp(1.5rem,3vw,2rem);color:var(--brand-blue);margin:0 0 .5rem}
section h2.center,section h2.text-center{text-align:center}
.section-intro{color:var(--muted);max-width:680px;margin:0 auto 2rem;text-align:center}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.25rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.5rem;box-shadow:0 1px 3px rgba(0,0,0,.04);transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:0 8px 24px rgba(0,0,0,.08);transform:translateY(-3px)}
.card .icon{font-size:2rem;margin-bottom:.5rem}
.card h3{margin:0 0 .5rem;color:var(--brand-blue)}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.25rem;counter-reset:step}
.step{position:relative;background:#f6f8fc;border-radius:var(--radius);padding:1.5rem 1.25rem 1.25rem;border:1px solid var(--border)}
.step::before{counter-increment:step;content:counter(step);
  position:absolute;top:-14px;left:1rem;background:var(--brand-yellow);color:var(--brand-blue-dark);
  width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}
.step h3{margin:.25rem 0 .5rem;color:var(--brand-blue)}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--border);border-radius:.5rem;margin-bottom:.6rem;overflow:hidden}
.faq summary{padding:1rem 1.25rem;cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"▾";transition:transform .2s;color:var(--brand-blue)}
.faq details[open] summary::after{transform:rotate(180deg)}
.faq details[open] summary{color:var(--brand-blue);background:#f6f8fc}
.faq .answer{padding:0 1.25rem 1.25rem;color:var(--muted)}

/* Form */
.form{max-width:640px;margin:0 auto;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);padding:2rem;box-shadow:0 4px 18px rgba(0,0,0,.05)}
.form label{display:block;font-weight:600;margin:.85rem 0 .3rem;font-size:.95rem}
.form input,.form select,.form textarea{
  width:100%;padding:.7rem .85rem;border:1px solid var(--border);border-radius:.5rem;
  font-family:inherit;font-size:1rem;background:#fafbfd}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--brand-blue);border-color:var(--brand-blue)}
.form textarea{min-height:110px;resize:vertical}
.form .actions{margin-top:1.5rem;text-align:center}
.form .note{font-size:.85rem;color:var(--muted);margin-top:1rem;text-align:center}

.alert{padding:1rem 1.25rem;border-radius:.5rem;margin-bottom:1.5rem}
.alert.success{background:#e8f7ec;border:1px solid #b6e0c0;color:#1d6a2c}
.alert.error{background:#fdecea;border:1px solid #f3b8b3;color:#9a2a23}

/* Video embed */
.video-wrap{position:relative;padding-bottom:56.25%;height:0;border-radius:var(--radius);overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.15)}
.video-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* Iframe full */
.iframe-full{width:100%;height:80vh;border:0;display:block}

/* Footer */
.site-footer{background:#0a1633;color:#cfd6e6;margin-top:3rem;padding:2.5rem 0 1rem}
.site-footer h4{color:#fff;margin:0 0 .75rem}
.site-footer a{color:#cfd6e6}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:.4rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:2rem;padding-bottom:1.5rem;border-bottom:1px solid #1f2e55}
.footer-logo{height:40px;margin-bottom:.75rem;filter:brightness(0) invert(1)}
.footer-legal{padding-top:1rem;text-align:center;color:#8590ab}

/* Bg sections variants */
.bg-soft{background:#f6f8fc}

/* Responsive */
@media (max-width:820px){
  .nav-burger{display:block}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;
    flex-direction:column;align-items:stretch;padding:1rem 1.25rem;border-bottom:1px solid var(--border);gap:.6rem}
  .nav-toggle:checked ~ .nav-links{display:flex}
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .hero img{max-height:240px}
}

/* === Linux Angels === */
.angels-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:1.5rem; margin-top:2rem; }
.angel-card { display:flex; flex-direction:column; align-items:center; padding:1.5rem; background:#fff; border:1px solid #e5e7eb; border-radius:1rem; text-decoration:none; color:inherit; transition:transform .2s, box-shadow .2s; text-align:center; }
.angel-card:hover { transform:translateY(-4px); box-shadow:0 10px 30px rgba(0,51,153,.12); }
.angel-photo { width:140px; height:140px; border-radius:50%; overflow:hidden; background:#fff; box-shadow:0 4px 12px rgba(0,0,0,.1); margin-bottom:1rem; }
.angel-photo img { width:100%; height:100%; object-fit:cover; }
.angel-card h2 { font-size:1.25rem; margin:.25rem 0; color:#003399; }
.angel-card p { margin:.15rem 0; font-size:.95rem; }
.join-box { margin-top:3rem; padding:2rem; background:#f5f7fb; border:1px solid #e5e7eb; border-radius:1rem; text-align:center; }
.join-box h3 { margin:0 0 .5rem; color:#003399; }

/* === Landing page === */
.landing-grid { display:grid; grid-template-columns:1fr; gap:2rem; align-items:center; }
@media(min-width:768px){ .landing-grid { grid-template-columns:1.4fr 1fr; } }
.landing-photo img { width:100%; max-width:360px; border-radius:1rem; box-shadow:0 10px 30px rgba(0,0,0,.15); }
.badge { display:inline-block; background:#fee2e2; color:#b91c1c; padding:.4rem .8rem; border-radius:999px; font-size:.85rem; font-weight:600; margin-bottom:1rem; }
.accent { color:#facc15; }
.cta-row { display:flex; flex-wrap:wrap; gap:.75rem; margin-top:1.5rem; }
.btn-secondary { display:inline-block; padding:.75rem 1.25rem; background:#fff; color:#003399; border:2px solid #003399; border-radius:.5rem; text-decoration:none; font-weight:600; }
.btn-secondary:hover { background:#003399; color:#fff; }
.testimonial { background:#f5f7fb; border-left:4px solid #facc15; padding:1.5rem; border-radius:.5rem; font-style:italic; }
.testimonial footer { margin-top:.75rem; font-style:normal; color:#555; font-size:.9rem; }
.form-card { background:#fff; border:1px solid #e5e7eb; border-radius:1rem; padding:2rem; display:flex; flex-direction:column; gap:1rem; max-width:600px; }
.form-card label { display:flex; flex-direction:column; gap:.35rem; font-weight:600; color:#003399; }
.form-card input, .form-card textarea { padding:.65rem .8rem; border:1px solid #d1d5db; border-radius:.5rem; font:inherit; }
.form-card button { align-self:flex-start; }