/* KOVA — site de présentation · même identité que l'application (un accent bleu, fonds neutres, thème auto/clair/sombre) */
:root{color-scheme:light;--bg:#f6f7f9;--surface:#fff;--surface-2:#f1f3f6;--surface-3:#e6e9ee;--text:#15171c;--muted:#5f6674;--line:rgba(20,24,36,.11);--primary:#3f5fe0;--on-primary:#fff;--soft:rgba(63,95,224,.10);--ok:#1f9d6e;--shadow:0 8px 28px rgba(16,24,40,.08);--shadow-sm:0 2px 10px rgba(16,24,40,.06);--r:20px;--r-sm:14px}
:root[data-theme=dark]{color-scheme:dark;--bg:#0f1114;--surface:#171a1f;--surface-2:#1f2329;--surface-3:#292e36;--text:#eceef2;--muted:#a0a7b3;--line:rgba(255,255,255,.10);--primary:#7b93ff;--on-primary:#0f1114;--soft:rgba(123,147,255,.14);--shadow:0 10px 32px rgba(0,0,0,.45);--shadow-sm:0 4px 14px rgba(0,0,0,.35)}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--bg:#0f1114;--surface:#171a1f;--surface-2:#1f2329;--surface-3:#292e36;--text:#eceef2;--muted:#a0a7b3;--line:rgba(255,255,255,.10);--primary:#7b93ff;--on-primary:#0f1114;--soft:rgba(123,147,255,.14);--shadow:0 10px 32px rgba(0,0,0,.45);--shadow-sm:0 4px 14px rgba(0,0,0,.35)}}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}a{color:var(--primary);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--primary);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:12px;top:-60px;z-index:100;padding:10px 16px;border-radius:12px;background:var(--primary);color:var(--on-primary);font-weight:700;text-decoration:none}.skip:focus{top:12px}
.wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 clamp(16px,4vw,40px)}
.ico{width:1.25em;height:1.25em;flex:none;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;vertical-align:-.22em}
/* en-tête */
.top{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:14px;min-height:64px}
.brand{display:flex;align-items:center;color:var(--text);text-decoration:none;margin-right:auto}.brand svg{height:32px;width:auto}
.nav{display:flex;align-items:center;gap:4px}.nav a{padding:9px 13px;border-radius:12px;color:var(--muted);font-weight:650;font-size:.95rem;text-decoration:none}.nav a:hover,.nav a[aria-current=page]{color:var(--text);background:var(--surface-2)}
.tbtn{display:inline-grid;place-items:center;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--text);cursor:pointer}.tbtn:hover{background:var(--surface-2)}
.burger{display:none}
.tbtn .i-moon{display:none}:root[data-theme=dark] .tbtn .i-sun{display:none}:root[data-theme=dark] .tbtn .i-moon{display:inline}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]) .tbtn .i-sun{display:none}:root:not([data-theme=light]) .tbtn .i-moon{display:inline}}
@media(max-width:900px){.burger{display:inline-grid}.nav{position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:2px;padding:10px 16px 16px;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none}.nav.open{display:flex}.nav a{padding:13px 14px;font-size:1rem}.top .cta-top{display:none}}
/* boutons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:0 22px;border:2px solid var(--primary);border-radius:var(--r-sm);background:transparent;color:var(--primary);font:inherit;font-weight:750;text-decoration:none;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}.btn.primary{background:var(--primary);color:var(--on-primary)}.btn.sm{min-height:40px;padding:0 16px;font-size:.9rem}
.btns{display:flex;flex-wrap:wrap;gap:12px}
/* typographie et sections */
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em}h1{font-size:clamp(2.1rem,5vw,3.6rem)}h2{font-size:clamp(1.55rem,3.2vw,2.3rem)}h3{font-size:1.15rem;letter-spacing:-.01em}
p{margin:0 0 1em}.lead{font-size:clamp(1.05rem,1.6vw,1.22rem);color:var(--muted);max-width:58ch}.muted{color:var(--muted)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 14px;padding:6px 12px;border-radius:99px;background:var(--soft);color:var(--primary);font-weight:750;font-size:.82rem}
section{padding:clamp(40px,7vw,84px) 0}.band{background:var(--surface);border-block:1px solid var(--line)}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,6vw,80px);align-items:center;padding-block:clamp(32px,7vw,88px)}
.hero h1 em{font-style:normal;color:var(--primary)}
.sub{max-width:1160px;padding-block:clamp(32px,6vw,64px) 8px}.sub>*{max-width:760px}.sub p.lead{margin-bottom:0}
.crumb{display:flex;gap:8px;margin:0 0 14px;padding:0;list-style:none;font-size:.88rem;color:var(--muted)}.crumb li+li::before{content:"/";margin-right:8px;opacity:.6}.crumb a{color:var(--muted)}
.grid{display:grid;gap:18px}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:960px){.hero{grid-template-columns:1fr}.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.g3,.g2,.g4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:clamp(20px,3vw,28px);box-shadow:var(--shadow-sm)}
.card h3{display:flex;align-items:center;gap:10px}.card p{margin:0;color:var(--muted)}.card p+p{margin-top:.7em}
.chip{display:inline-grid;place-items:center;width:44px;height:44px;margin-bottom:14px;border-radius:14px;background:var(--soft);color:var(--primary)}.chip .ico{width:24px;height:24px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,6vw,72px);align-items:center}.split.rev>:first-child{order:2}
@media(max-width:900px){.split{grid-template-columns:1fr}.split.rev>:first-child{order:0}}
.ticks{list-style:none;margin:0 0 1.2em;padding:0;display:grid;gap:11px}.ticks li{display:flex;gap:11px;align-items:flex-start}.ticks .ico{color:var(--ok);margin-top:.2em}
.note{display:flex;gap:12px;padding:16px 18px;border:1px solid var(--line);border-left:4px solid var(--primary);border-radius:var(--r-sm);background:var(--surface);color:var(--muted)}.note strong{color:var(--text)}
.steps{counter-reset:s;list-style:none;margin:0;padding:0;display:grid;gap:14px}.steps li{counter-increment:s;display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface)}
.steps li::before{content:counter(s);flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--primary);color:var(--on-primary);font-weight:800}
details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);padding:4px 18px;margin:0 0 10px}summary{cursor:pointer;padding:14px 0;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:12px}summary::-webkit-details-marker{display:none}summary::after{content:"+";font-size:1.4rem;line-height:1;color:var(--primary)}details[open] summary::after{content:"−"}details p{color:var(--muted)}
.prose{max-width:760px}.prose h2{margin-top:1.6em;font-size:1.45rem}.prose h3{margin-top:1.3em}.prose li{margin-bottom:.4em}.prose .todo{background:var(--soft);padding:1px 7px;border-radius:6px;font-weight:700}
.cta{text-align:center;padding:clamp(28px,5vw,52px);border-radius:var(--r);background:var(--primary);color:var(--on-primary)}.cta p{opacity:.92;margin-left:auto;margin-right:auto;max-width:52ch}.cta .btns{justify-content:center}.cta .btn{border-color:var(--on-primary);color:var(--on-primary)}.cta .btn.light{background:var(--on-primary);color:var(--primary)}
/* maquettes de téléphone (dessinées en HTML/CSS) */
.stage{display:flex;justify-content:center;gap:18px;align-items:flex-end}
.phone{width:min(270px,76vw);aspect-ratio:9/18;padding:9px;border-radius:38px;background:#12151b;box-shadow:var(--shadow),0 0 0 1px rgba(255,255,255,.08) inset;position:relative}.phone.b{margin-bottom:-18px}
.screen{height:100%;border-radius:30px;overflow:hidden;background:var(--bg);display:flex;flex-direction:column;font-size:11px;line-height:1.35;color:var(--text)}
.sbar{display:flex;align-items:center;justify-content:space-between;padding:12px 14px 8px;background:var(--surface);border-bottom:1px solid var(--line);font-weight:800;font-size:13px}.sbar span{color:var(--primary)}
.mpost{margin:8px;padding:10px;background:var(--surface);border:1px solid var(--line);border-radius:14px}.mhead{display:flex;align-items:center;gap:8px;margin-bottom:7px}.av{width:26px;height:26px;border-radius:50%;background:var(--primary);color:var(--on-primary);display:grid;place-items:center;font-weight:800;font-size:11px}.av.o{background:#e08a00;color:#fff}.av.g{background:#1f9d6e;color:#fff}
.mhead b{display:block;font-size:11.5px}.mhead small{color:var(--muted);font-size:9.5px}.mimg{height:92px;margin:7px 0;border-radius:10px;background:linear-gradient(160deg,var(--surface-3),var(--soft));display:grid;place-items:center;color:var(--primary)}.mimg .ico{width:34px;height:34px}
.mact{display:flex;gap:14px;color:var(--muted);font-size:10px}.mact span{display:inline-flex;gap:4px;align-items:center}.mact .ico{width:14px;height:14px}
.chat{flex:1;display:flex;flex-direction:column;gap:6px;padding:10px;background:var(--surface-2)}.lockn{align-self:center;display:inline-flex;gap:5px;align-items:center;padding:4px 9px;border-radius:99px;background:var(--surface);color:var(--muted);font-size:9.5px}.lockn .ico{width:12px;height:12px;color:var(--ok)}
.b1{max-width:78%;padding:7px 10px;border-radius:12px;background:var(--surface);box-shadow:0 1px 2px rgba(16,24,40,.12)}.b1.me{align-self:flex-end;background:var(--primary);color:var(--on-primary)}.b1 small{display:block;text-align:right;opacity:.65;font-size:8.5px}
.b1.big{background:none;box-shadow:none;font-size:34px;line-height:1;padding:0}
.mbar{display:flex;gap:6px;align-items:center;padding:8px;background:var(--surface);border-top:1px solid var(--line)}.mbar i{flex:1;height:28px;border-radius:99px;background:var(--surface-2);color:var(--muted);font-style:normal;padding:6px 10px;font-size:10px}.mbar .ico{width:17px;height:17px;color:var(--muted)}
.cam{flex:1;background:radial-gradient(circle at 50% 38%,#2d5f4a,#101a16 72%);color:#fff;position:relative;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:8px;padding:0 0 10px}
.cam .rec{position:absolute;top:12px;left:50%;transform:translateX(-50%);padding:2px 10px;border-radius:99px;background:#e5342c;font-weight:800;font-size:10px}
.shut{width:54px;height:54px;border-radius:50%;border:3px solid #fff;display:grid;place-items:center}.shut i{width:38px;height:38px;border-radius:50%;background:#fff}
.camh{font-size:9px;opacity:.85}.tray{align-self:stretch;margin:0 8px;padding:6px;border-radius:12px 12px 0 0;background:rgba(14,16,22,.9);display:flex;gap:5px}.tray i{flex:1;aspect-ratio:1;border-radius:7px;background:#2a2f3b}.tray i:first-child{background:#3f5fe0}
.fcols{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:28px}@media(max-width:800px){.fcols{grid-template-columns:1fr 1fr}.fcols>:first-child{grid-column:1/-1}}
footer{padding:40px 0 28px;border-top:1px solid var(--line);background:var(--surface);color:var(--muted);font-size:.93rem}footer h2{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text);margin:0 0 12px}footer ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}footer a{color:var(--muted);text-decoration:none}footer a:hover{color:var(--primary);text-decoration:underline}
.legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:28px;padding-top:18px;border-top:1px solid var(--line);font-size:.85rem}
.sitemap{columns:2;gap:30px}@media(max-width:620px){.sitemap{columns:1}}.sitemap li{margin-bottom:8px;break-inside:avoid}
.err{min-height:56vh;display:grid;place-items:center;text-align:center;padding-block:60px}.err b{display:block;font-size:clamp(4rem,14vw,8rem);line-height:1;color:var(--primary);letter-spacing:-.04em}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.top,footer,.cta,.skip{display:none}}
.stage{max-width:100%}
@media(max-width:700px){.hero .stage .phone.b{display:none}.phone.b{margin-bottom:0}}
.b1.big .ico{width:44px;height:44px;color:#e08a00}