/* RETBA.app, landing cinématique. Charte RETBA (navy/teal/Cormorant) + échelle
   typographique déclarative façon pear.no. Fond sombre assumé, films en fond. */

/* ---------- polices auto-hébergées ---------- */
@font-face{font-family:Cormorant;src:url(/assets/fonts/cormorant-garamond-400-normal-latin.woff2) format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:Cormorant;src:url(/assets/fonts/cormorant-garamond-500-normal-latin.woff2) format('woff2');font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:Cormorant;src:url(/assets/fonts/cormorant-garamond-600-normal-latin.woff2) format('woff2');font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:Cormorant;src:url(/assets/fonts/cormorant-garamond-400-italic-latin.woff2) format('woff2');font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:Cormorant;src:url(/assets/fonts/cormorant-garamond-500-italic-latin.woff2) format('woff2');font-weight:500;font-style:italic;font-display:swap}
@font-face{font-family:Inter;src:url(/assets/fonts/inter-400-normal-latin.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:Inter;src:url(/assets/fonts/inter-500-normal-latin.woff2) format('woff2');font-weight:500;font-display:swap}
@font-face{font-family:Inter;src:url(/assets/fonts/inter-600-normal-latin.woff2) format('woff2');font-weight:600;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url(/assets/fonts/ibm-plex-mono-400-normal-latin.woff2) format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'IBM Plex Mono';src:url(/assets/fonts/ibm-plex-mono-500-normal-latin.woff2) format('woff2');font-weight:500;font-display:swap}

:root{
  --navy-950:#0a1122; --navy-900:#0f1830; --navy-850:#131e3a; --navy-800:#182544;
  --paper:#f4f1e9; --body:#c9d2e2; --muted:#8b97ad; --teal:#6fcabb;
  --hair:rgba(201,210,226,.14); --hair-2:rgba(201,210,226,.08);
  --rose:#d98b93; /* clin d'œil Lac Retba, usage minimal */
  --ease:cubic-bezier(0.16,1,0.3,1);
  --display:Cormorant,Georgia,serif;
  --sans:Inter,system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{overflow-x:clip}
html{scroll-behavior:smooth}
body{
  background:var(--navy-950); color:var(--body);
  font-family:var(--sans); font-size:17px; line-height:1.65;
  -webkit-font-smoothing:antialiased; font-synthesis:none;
}
a{color:inherit;text-decoration:none}
img,video{max-width:100%;display:block}
::selection{background:var(--teal);color:var(--navy-950)}

.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(20px,5vw,64px)}

/* ---------- kicker signature ---------- */
.kicker{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.24em;
  text-transform:uppercase;color:var(--teal);display:inline-flex;align-items:center;gap:.6em}
.kicker::before{content:"◆";font-size:9px;opacity:.9}
.kicker.muted{color:var(--muted)}
.kicker.muted::before{color:var(--teal)}

/* ---------- typo d'affichage ---------- */
.display{font-family:var(--display);font-weight:500;line-height:1.02;letter-spacing:-.01em;
  color:var(--paper);overflow-wrap:anywhere;min-width:0}
.display em{font-style:italic;color:var(--teal);font-weight:500}
.h-hero{font-size:clamp(2.9rem,7.2vw,6.4rem)}
.h-sec{font-size:clamp(2.1rem,4.6vw,3.9rem)}
.h-block{font-size:clamp(1.7rem,3vw,2.7rem)}
.lede{font-size:clamp(1.05rem,1.7vw,1.35rem);color:var(--body);max-width:56ch;line-height:1.55}

/* ---------- boutons ---------- */
.btn{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;
  display:inline-flex;align-items:center;gap:.7em;padding:15px 26px;border-radius:2px;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  border:1px solid transparent;cursor:pointer;white-space:nowrap}
.btn-primary{background:var(--paper);color:var(--navy-950)}
.btn-primary:hover{background:var(--teal);transform:translateY(-1px)}
.btn-ghost{border-color:var(--hair);color:var(--body)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn .arrow{transition:transform .2s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- nav ---------- */
.nav{position:absolute;top:0;left:0;right:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px clamp(20px,5vw,64px)}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:34px;height:34px;border-radius:6px;object-fit:cover}
.brand .wm{font-family:var(--display);font-size:22px;font-weight:600;color:var(--paper);letter-spacing:.01em}
.brand .wm b{color:var(--teal);font-weight:600}
.nav-cta{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--body);display:inline-flex;align-items:center;gap:.6em;transition:color .2s var(--ease)}
.nav-cta:hover{color:var(--teal)}

/* ---------- film / hero ---------- */
.film{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;overflow:hidden;
  background:var(--navy-900)}
.hero-shade{position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(180deg,rgba(10,17,34,.55) 0%,rgba(10,17,34,.2) 30%,rgba(10,17,34,.72) 78%,var(--navy-950) 100%),
    radial-gradient(120% 80% at 20% 90%,rgba(10,17,34,.6),transparent 60%)}
.hero-inner{position:relative;z-index:2;padding-bottom:clamp(48px,9vh,110px);padding-top:120px;width:100%}
.hero .kicker{margin-bottom:24px}
.hero .h-hero{max-width:16ch;margin-bottom:28px}
.hero .lede{margin-bottom:38px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.scroll-cue{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--muted);margin-left:auto;display:flex;align-items:center;gap:10px}
.scroll-cue i{width:1px;height:34px;background:linear-gradient(var(--teal),transparent);display:block;animation:cue 2.4s var(--ease) infinite}
@keyframes cue{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}55%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- manifeste ---------- */
/* ---------- sections déclaratives (manifeste + offre), même registre ---------- */
.manifesto{padding:clamp(90px,16vh,180px) 0;border-bottom:1px solid var(--hair-2)}
.offer{padding:clamp(84px,15vh,175px) 0;border-bottom:1px solid var(--hair-2)}
.big{font-family:var(--display);font-weight:500;line-height:1.16;
  font-size:clamp(1.9rem,4.2vw,3.5rem);color:var(--paper);letter-spacing:-.01em;max-width:22ch}
.big span{color:var(--muted)}
.big em{font-style:italic;color:var(--teal)}
.foot{margin-top:38px;max-width:62ch;color:var(--body);
  font-size:clamp(1.02rem,1.4vw,1.2rem);line-height:1.72}
.seq{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:42px;
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.seq span{display:inline-flex;align-items:center;gap:16px}
.seq span:not(:last-child)::after{content:"→";color:var(--teal);opacity:.75}

/* ---------- en-têtes de section (carte, faq) : empilés, jamais en split ---------- */
.sec-head{margin-bottom:clamp(40px,7vh,72px);max-width:64ch}
.sec-head .lede{margin-top:18px}

/* ---------- flux (bande film matrix, plein cadre) ---------- */
.stream{position:relative;min-height:76svh;display:flex;align-items:center;overflow:hidden;
  background:var(--navy-950);border-top:1px solid var(--hair-2);border-bottom:1px solid var(--hair-2)}
.stream-shade{position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(90deg,rgba(10,17,34,.92) 0%,rgba(10,17,34,.6) 52%,rgba(10,17,34,.32) 100%),
    linear-gradient(180deg,var(--navy-950) 0%,transparent 26%,transparent 72%,var(--navy-950) 100%)}
.stream-inner{position:relative;z-index:2;width:100%;padding:clamp(56px,10vh,112px) 0}
.stream .h-sec{max-width:20ch}
.stream .lede{margin-top:22px;max-width:52ch}

/* ---------- FAQ ---------- */
.faq{padding:clamp(70px,12vh,130px) 0}
.faq-list{margin-top:clamp(32px,5vh,56px);border-top:1px solid var(--hair)}
details.qa{border-bottom:1px solid var(--hair)}
details.qa summary{list-style:none;cursor:pointer;padding:26px 0;display:flex;
  justify-content:space-between;gap:24px;align-items:baseline}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary h3{font-family:var(--display);font-weight:500;font-size:clamp(1.3rem,2.2vw,1.8rem);
  color:var(--paper);line-height:1.15}
details.qa .sign{font-family:var(--mono);color:var(--teal);font-size:20px;line-height:1;flex:none;
  transition:transform .25s var(--ease)}
details.qa[open] .sign{transform:rotate(45deg)}
details.qa .ans{padding:0 0 28px;max-width:64ch;color:var(--body)}
details.qa .ans p+p{margin-top:12px}

/* ---------- footer cinématique ---------- */
.close{position:relative;min-height:82svh;display:flex;align-items:center;overflow:hidden;background:var(--navy-950)}
.close-shade{position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,var(--navy-950) 0%,rgba(10,17,34,.55) 34%,rgba(10,17,34,.78) 100%)}
.close-inner{position:relative;z-index:2;width:100%;padding:clamp(60px,12vh,120px) 0}
.close .h-sec{max-width:15ch;margin:20px 0 30px}
.close .h-sec em{font-style:italic;color:var(--teal)}
.foot-bar{border-top:1px solid var(--hair);background:var(--navy-950)}
.foot-bar .wrap{display:flex;flex-wrap:wrap;gap:16px 32px;justify-content:space-between;
  align-items:center;padding-top:26px;padding-bottom:26px}
.foot-bar .meta{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}

/* ---------- reveal au scroll ---------- */
.rise{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.rise.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important}
  .rise{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .film{display:none}
}

@media(max-width:560px){
  body{font-size:16px}
  .hero-actions{width:100%}
  .hero-actions .btn{flex:1;justify-content:center}
  .scroll-cue{display:none}
  .sec-head{flex-direction:column}
}