/* =========================================================
   ONN/OFF Studio — Design system
   Sombre & tech · noir/cyan + accents rouges
   ========================================================= */
:root{
  --bg:#07090c; --bg2:#0b0e14; --panel:#10151e; --panel2:#141b26;
  --line:rgba(255,255,255,.09); --line2:rgba(255,255,255,.14);
  --text:#e9eef4; --muted:#97a3b2; --dim:#6b7686;
  --cyan:#00e5ff; --cyan-d:#0bb6cc; --teal:#19f0d0; --red:#e8323f; --red-d:#b81f2b;
  --r:16px; --r-sm:11px; --maxw:1160px;
  --shadow:0 24px 60px rgba(0,0,0,.45);
  --grad:linear-gradient(135deg,#00e5ff 0%,#19f0d0 100%);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  font-size:17px; line-height:1.65; -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:'Space Grotesk','Inter',sans-serif; line-height:1.1; margin:0 0 .5em; letter-spacing:-.02em; font-weight:700}
h1{font-size:clamp(2.3rem,5.2vw,4rem)}
h2{font-size:clamp(1.7rem,3.6vw,2.6rem)}
h3{font-size:1.25rem}
p{margin:0 0 1rem}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.accent{color:var(--cyan)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.muted{color:var(--muted)}
.eyebrow{font-family:'Space Grotesk';font-size:.78rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);margin-bottom:1rem}
.center{text-align:center}
.section{padding:96px 0;position:relative}
.section--tight{padding:64px 0}
.lead{font-size:1.15rem;color:var(--muted);max-width:60ch}

/* ---- glows / background fx ---- */
.glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;z-index:0;pointer-events:none}
.glow--cyan{background:radial-gradient(circle,rgba(0,229,255,.5),transparent 70%)}
.glow--red{background:radial-gradient(circle,rgba(232,50,63,.4),transparent 70%)}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:.5em;font-family:'Space Grotesk';font-weight:600;font-size:.97rem;
  padding:.82em 1.5em;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:.2s ease;white-space:nowrap}
.btn-primary{background:var(--grad);color:#04222a;box-shadow:0 10px 30px rgba(0,229,255,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(0,229,255,.34)}
.btn-ghost{border-color:var(--line2);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-sm{padding:.6em 1.1em;font-size:.88rem}

/* ---- header / nav ---- */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(7,9,12,.72);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;font-family:'Space Grotesk';font-weight:700;font-size:1.18rem;letter-spacing:-.02em}
.brand img{width:40px;height:40px}
.brand .slash{color:var(--red)}
.brand small{display:block;font-size:.6rem;letter-spacing:.28em;color:var(--cyan);font-weight:600}
.nav-links{display:flex;align-items:center;gap:30px;list-style:none;margin:0;padding:0}
.nav-links a{font-size:.95rem;color:var(--muted);font-weight:500;transition:.2s;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-26px;height:2px;background:var(--grad)}
.nav-cta{display:flex;align-items:center;gap:14px}
.burger{display:none;background:none;border:0;color:var(--text);cursor:pointer;padding:6px}
.burger svg{width:26px;height:26px}

/* ---- hero ---- */
.hero{position:relative;padding:88px 0 72px;overflow:hidden}
.hero .glow--cyan{width:640px;height:640px;top:-220px;right:-160px}
.hero .glow--red{width:420px;height:420px;bottom:-200px;left:-160px;opacity:.3}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center;position:relative;z-index:2}
.hero h1{margin-bottom:.35em}
.hero .lead{font-size:1.22rem}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.hero-meta{display:flex;gap:28px;margin-top:38px;flex-wrap:wrap}
.hero-meta div{font-size:.86rem;color:var(--muted)}
.hero-meta b{display:block;font-family:'Space Grotesk';font-size:1.5rem;color:var(--text);font-weight:700}
.hero-visual{position:relative}
.device{background:var(--panel);border:1px solid var(--line2);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.device .bar{display:flex;gap:7px;padding:13px 16px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.02)}
.device .bar i{width:11px;height:11px;border-radius:50%;background:#2a3340;display:block}
.device .bar i:first-child{background:var(--red)}
.device img{width:100%;display:block}
.hero-logo-badge{position:absolute;width:96px;height:96px;right:-18px;bottom:-22px;
  filter:drop-shadow(0 12px 24px rgba(0,0,0,.5))}

/* ---- pills row ---- */
.pillrow{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.pill{font-size:.84rem;color:var(--muted);border:1px solid var(--line);background:rgba(255,255,255,.02);
  padding:.45em 1em;border-radius:999px}
.pill::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--cyan);margin-right:8px;vertical-align:middle}

/* ---- cards / grids ---- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:28px;transition:.25s ease;position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);border-color:var(--line2);box-shadow:var(--shadow)}
.card .num{font-family:'Space Grotesk';font-size:2.4rem;font-weight:700;color:rgba(0,229,255,.16);position:absolute;top:14px;right:20px}
.card h3{margin-bottom:.4em}
.card p{color:var(--muted);font-size:.95rem;margin:0}
.card .ico{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(0,229,255,.1);border:1px solid rgba(0,229,255,.25);margin-bottom:18px}
.card .ico svg{width:24px;height:24px;stroke:var(--cyan);fill:none;stroke-width:1.7}
.card--accent{border-color:rgba(0,229,255,.3)}
.card-link{margin-top:16px;font-family:'Space Grotesk';font-weight:600;font-size:.9rem;color:var(--cyan);display:inline-flex;gap:6px}

/* ---- portfolio cards ---- */
.work{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.work:hover{transform:translateY(-4px);border-color:var(--line2);box-shadow:var(--shadow)}
.work-shot{aspect-ratio:1200/628;overflow:hidden;background:#05070a;border-bottom:1px solid var(--line)}
.work-shot img{width:100%;height:100%;object-fit:cover}
.work-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:6px;flex:1}
.work-body .cat{font-family:'Space Grotesk';font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.work-body h3{margin:.1em 0 .2em}
.work-body p{color:var(--muted);font-size:.93rem;margin:0 0 8px}
.work-meta{margin-top:auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.badge{font-family:'Space Grotesk';font-size:.68rem;font-weight:600;letter-spacing:.06em;padding:.3em .7em;border-radius:999px;text-transform:uppercase}
.badge-live{background:rgba(25,240,208,.14);color:var(--teal)}
.badge-flag{background:rgba(232,50,63,.16);color:#ff6b76}
.badge-dev{background:rgba(242,166,12,.16);color:#f3b34e}
.appicon{width:40px;height:40px;border-radius:10px;border:1px solid var(--line)}

/* ---- featured case ---- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:0;background:var(--panel);border:1px solid var(--line2);border-radius:var(--r);overflow:hidden}
.feature .media{background:#05070a;display:flex;align-items:center;justify-content:center;border-right:1px solid var(--line)}
.feature .media img{width:100%;height:100%;object-fit:cover}
.feature .body{padding:42px}
.feature .body h2{font-size:1.9rem}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}
.tags span{font-size:.8rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:.3em .8em}

/* ---- steps ---- */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.step{position:relative;padding-top:18px;border-top:2px solid var(--line2)}
.step .n{font-family:'Space Grotesk';font-weight:700;color:var(--cyan);font-size:1.5rem}
.step h4{margin:.3em 0 .3em;font-size:1.05rem}
.step p{color:var(--muted);font-size:.9rem;margin:0}

/* ---- CTA band ---- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(120deg,#0a1016,#0c1620);border:1px solid var(--line2);border-radius:24px;padding:56px;text-align:center}
.cta-band .glow--cyan{width:520px;height:520px;top:-260px;left:50%;transform:translateX(-50%);opacity:.4}
.cta-band h2{position:relative}
.cta-band .btn{position:relative}

/* ---- contact ---- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.field{margin-bottom:18px}
.field label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:7px;font-weight:500}
.field input,.field textarea{width:100%;background:var(--bg2);border:1px solid var(--line2);border-radius:11px;
  color:var(--text);padding:13px 15px;font:inherit;font-size:.95rem;transition:.2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(0,229,255,.12)}
.contact-info{display:flex;flex-direction:column;gap:18px}
.contact-info a{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--panel);transition:.2s}
.contact-info a:hover{border-color:var(--cyan);transform:translateX(3px)}
.contact-info .ci-ico{width:40px;height:40px;border-radius:10px;background:rgba(0,229,255,.1);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-info .ci-ico svg{width:20px;height:20px;stroke:var(--cyan);fill:none;stroke-width:1.7}
.contact-info b{display:block;font-family:'Space Grotesk'}
.contact-info span{font-size:.85rem;color:var(--muted)}

/* ---- page hero (inner) ---- */
.page-hero{position:relative;padding:70px 0 30px;overflow:hidden}
.page-hero .glow--cyan{width:480px;height:480px;top:-260px;right:-120px;opacity:.4}
.page-hero h1{font-size:clamp(2rem,4.4vw,3.2rem)}

/* ---- footer ---- */
.site-footer{border-top:1px solid var(--line);padding:54px 0 30px;background:var(--bg2);position:relative}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:36px}
.footer-top p{color:var(--muted);font-size:.92rem;max-width:34ch}
.footer-col h4{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--dim);font-family:'Space Grotesk'}
.footer-col a{display:block;color:var(--muted);font-size:.93rem;padding:5px 0;transition:.2s}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:22px;flex-wrap:wrap;gap:12px}
.footer-bottom small{color:var(--dim);font-size:.83rem}
.socials{display:flex;gap:12px}
.socials a{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--muted);transition:.2s}
.socials a:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.socials svg{width:18px;height:18px;fill:currentColor}

/* ---- reveal animation ---- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---- responsive ---- */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{max-width:520px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .feature{grid-template-columns:1fr}
  .feature .media{border-right:0;border-bottom:1px solid var(--line);min-height:240px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  body{font-size:16px}
  .section{padding:68px 0}
  .nav-links,.nav-cta .btn{display:none}
  .burger{display:inline-flex}
  .nav-links.open{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;gap:0;
    background:var(--bg2);border-bottom:1px solid var(--line);padding:10px 24px 20px}
  .nav-links.open a{padding:13px 0;border-bottom:1px solid var(--line);width:100%}
  .nav-links.open a.active::after{display:none}
  .grid-2,.grid-3,.grid-4,.steps,.footer-top{grid-template-columns:1fr}
  .cta-band{padding:40px 24px}
  .feature .body{padding:28px}
}


/* ---- page légale ---- */
.legal{max-width:80ch}
.legal article{padding:22px 0;border-top:1px solid var(--line)}
.legal article:first-child{border-top:0;padding-top:0}
.legal h2{font-size:1.35rem;color:var(--text);margin-bottom:.5em}
.legal p{color:var(--muted);font-size:.98rem}
.legal ul{margin:0 0 1rem;padding-left:1.2em;color:var(--muted);font-size:.98rem}
.legal li{margin-bottom:.35em}
.legal a{color:var(--cyan)}
.legal strong{color:var(--text)}

/* ===== Fond animé — carrousel plein site (charte ONN/OFF) ===== */
html{background:var(--bg)}
body{background:transparent}
.site-bg{position:fixed;inset:0;z-index:-2;overflow:hidden;pointer-events:none}
.site-bg__slide{position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;transition:opacity 2.2s ease-in-out;
  transform:scale(1.0);animation:bgZoom 30s ease-in-out infinite alternate}
.site-bg__slide.is-active{opacity:1}
@keyframes bgZoom{from{transform:scale(1.0)}to{transform:scale(1.045)}}
.site-veil{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(7,9,12,.86),rgba(7,9,12,.74) 42%,rgba(7,9,12,.92)),
    radial-gradient(1200px 620px at 12% -5%,rgba(0,229,255,.12),transparent 60%),
    radial-gradient(1000px 560px at 105% 105%,rgba(232,50,63,.10),transparent 60%)}
@media(prefers-reduced-motion:reduce){.site-bg__slide{animation:none;transform:none}}