/* ============================================================
   Aviator Developers — aviatorusapp.site
   France, since 2020. B2B SaaS → consumer mobile.
   ============================================================ */

:root{
  --night:#0B1017;
  --night-2:#111823;
  --panel:#16202D;
  --panel-2:#1C2838;
  --edge:#243244;
  --edge-2:#334459;

  --amber:#F0A830;        /* instrument amber */
  --amber-deep:#C9861B;
  --altim:#5BD3E0;        /* altimeter cyan */
  --horizon:#7A93FF;      /* artificial horizon blue */
  --warn:#FF6B5E;

  --text:#EDF2F8;
  --text-2:#A6B4C6;
  --text-3:#6B7C93;
  --faint:#4A5A70;

  --line:#1D2836;
  --line-2:#2B3B4F;

  --r:10px;
  --maxw:1180px;
  --ease:cubic-bezier(.2,.65,.3,1);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:86px}

body{
  background:var(--night);color:var(--text);
  font-family:"Instrument Sans",-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,h4{font-family:"Instrument Sans",sans-serif;font-weight:600;letter-spacing:-.022em;line-height:1.1}
.serif{font-family:"Instrument Serif",Georgia,serif;font-weight:400;font-style:italic}
a{color:inherit;text-decoration:none}
ul{list-style:none}
svg{display:block}
code,.mono{font-family:"DM Mono",ui-monospace,Menlo,monospace}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 26px}

/* ---------- labels ---------- */
.tag{display:inline-flex;align-items:center;gap:10px;font-family:"DM Mono",monospace;
  font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--amber)}
.tag::before{content:"";width:20px;height:1px;background:var(--amber)}
.tag.c{color:var(--altim)}.tag.c::before{background:var(--altim)}
.tag.h{color:var(--horizon)}.tag.h::before{background:var(--horizon)}

.sec{padding:104px 0}
.sec-sm{padding:70px 0}
.head{max-width:650px;margin-bottom:52px}
.head h2{font-size:clamp(32px,4.8vw,52px);margin-top:16px}
.head p{color:var(--text-2);margin-top:16px;font-size:18px}
.head.mid{margin-inline:auto;text-align:center}
.head.mid .tag{justify-content:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:15px;
  padding:14px 28px;border:1px solid transparent;border-radius:40px;cursor:pointer;
  transition:transform .2s var(--ease),background .2s,border-color .2s,color .2s,box-shadow .2s}
.btn-amber{background:var(--amber);color:#0B1017;box-shadow:0 8px 24px rgba(240,168,48,.25)}
.btn-amber:hover{transform:translateY(-2px);background:var(--amber-deep);box-shadow:0 12px 32px rgba(240,168,48,.34)}
.btn-ghost{border-color:var(--edge-2);color:var(--text)}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber);transform:translateY(-2px)}

/* ---------- reveal: pure CSS, always ends visible ---------- */
.rv{animation:rvReveal .7s var(--ease) both}
@keyframes rvReveal{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.rv.d1{animation-delay:.08s}.rv.d2{animation-delay:.16s}.rv.d3{animation-delay:.24s}.rv.d4{animation-delay:.32s}

/* ============================================================
   HEADER
   ============================================================ */
.top{position:sticky;top:0;z-index:90;background:rgba(11,16,23,.84);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:border-color .25s}
.top.stuck{border-bottom-color:var(--line)}
.top-row{display:flex;align-items:center;justify-content:space-between;height:82px;gap:18px}

.brand{display:flex;align-items:center;gap:13px}
.brand-mark{width:40px;height:40px;flex:none}
.brand-mark .needle{transform-origin:20px 20px;animation:sweep 6s var(--ease) infinite}
@keyframes sweep{0%,100%{transform:rotate(-24deg)}50%{transform:rotate(26deg)}}
.brand-txt{font-weight:600;font-size:20px;letter-spacing:-.015em;line-height:1}
.brand-txt span{color:var(--amber)}
.brand-sub{display:block;font-family:"DM Mono",monospace;font-size:9.5px;letter-spacing:.16em;
  color:var(--faint);text-transform:uppercase;margin-top:4px}

.nav{display:none;gap:28px;align-items:center}
@media(min-width:1060px){.nav{display:flex}.top-cta{display:inline-flex}}
.nav a{font-weight:500;font-size:15px;color:var(--text-2);position:relative;padding:5px 0;transition:color .2s}
.nav a:hover{color:var(--text)}
.nav a.on{color:var(--amber)}
.nav a.on::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--amber);border-radius:2px}
.top-cta{display:none}

.burger{display:grid;place-items:center;width:42px;height:42px;border:1px solid var(--edge-2);border-radius:10px;background:transparent;cursor:pointer;flex:none}
.burger span{display:block;width:17px;height:2px;background:var(--text);border-radius:2px;transition:transform .28s,opacity .28s}
.burger span+span{margin-top:4px}
.burger.on span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger.on span:nth-child(2){opacity:0}
.burger.on span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
@media(min-width:1060px){.burger{display:none}}

.sheet{position:fixed;top:82px;left:0;right:0;z-index:89;background:var(--night-2);
  border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .36s var(--ease)}
.sheet.open{max-height:520px}
.sheet ul{padding:8px 26px 26px}
.sheet li+li{border-top:1px solid var(--line)}
.sheet a{display:block;padding:15px 0;font-weight:500;font-size:17px;color:var(--text-2)}
.sheet a.on{color:var(--amber)}

/* ============================================================
   HERO — horizon motif
   ============================================================ */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#0B1017 0%,#101824 55%,#0D141D 100%)}
.hero::before{content:"";position:absolute;left:0;right:0;top:58%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(122,147,255,.45),transparent)}
.hero::after{content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.015) 0 1px,transparent 1px 46px),
                   repeating-linear-gradient(90deg,rgba(255,255,255,.015) 0 1px,transparent 1px 46px);
  mask:radial-gradient(90% 70% at 50% 45%,#000,transparent 75%)}
.hero .wrap{position:relative;z-index:2;padding:92px 26px 96px}
.hero-grid{display:grid;gap:52px;align-items:center}
@media(min-width:980px){.hero-grid{grid-template-columns:1.1fr .9fr}}
.hero h1{font-size:clamp(40px,6.6vw,76px);letter-spacing:-.03em}
.hero h1 em{font-family:"Instrument Serif",Georgia,serif;font-style:italic;font-weight:400;color:var(--amber)}
.hero .lead{color:var(--text-2);font-size:clamp(17px,2vw,20px);margin-top:24px;max-width:52ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:13px;margin-top:34px}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:34px}
.pill{font-family:"DM Mono",monospace;font-size:12px;color:var(--text-2);border:1px solid var(--line-2);
  border-radius:30px;padding:7px 15px;background:rgba(22,32,45,.7)}
.pill b{color:var(--amber);font-weight:400}
.pill.c b{color:var(--altim)}

/* instrument dial */
.dial{display:flex;justify-content:center}
.dial svg{width:100%;max-width:360px;height:auto}
.dial .tick{stroke:var(--edge-2)}
.dial .arc{stroke-dasharray:420;stroke-dashoffset:420;animation:arc 2.2s var(--ease) .3s forwards}
@keyframes arc{to{stroke-dashoffset:120}}
.dial .hand{transform-origin:110px 110px;animation:hand 5s var(--ease) infinite}
@keyframes hand{0%,100%{transform:rotate(-38deg)}50%{transform:rotate(42deg)}}

/* ============================================================
   STRIP
   ============================================================ */
.strip{background:var(--night-2);overflow:hidden;padding:15px 0;border-bottom:1px solid var(--line)}
.strip-run{display:flex;gap:40px;width:max-content;animation:roll 40s linear infinite}
.strip:hover .strip-run{animation-play-state:paused}
@keyframes roll{to{transform:translateX(-50%)}}
.strip-run span{display:flex;align-items:center;gap:40px;white-space:nowrap;font-family:"DM Mono",monospace;
  font-size:13.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}
.strip-run i{font-style:normal;color:var(--amber)}

/* ============================================================
   CARDS
   ============================================================ */
.cards{display:grid;gap:22px;grid-template-columns:1fr}
@media(min-width:660px){.cards{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.cards.c3{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:32px 28px;
  transition:transform .26s var(--ease),box-shadow .26s,border-color .26s}
.card:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(0,0,0,.45);border-color:var(--edge-2)}
.card .ic{width:46px;height:46px;border-radius:10px;background:rgba(240,168,48,.1);display:grid;place-items:center;margin-bottom:18px}
.card .ic svg{width:23px;height:23px;stroke:var(--amber);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.card.c .ic{background:rgba(91,211,224,.1)}.card.c .ic svg{stroke:var(--altim)}
.card.h .ic{background:rgba(122,147,255,.1)}.card.h .ic svg{stroke:var(--horizon)}
.card h3{font-size:21px;margin-bottom:10px}
.card p{color:var(--text-2);font-size:15.5px}
.card .t{display:inline-block;margin-top:15px;font-family:"DM Mono",monospace;font-size:11px;
  letter-spacing:.09em;text-transform:uppercase;color:var(--faint)}

/* timeline */
.tl{position:relative;max-width:780px}
.tl::before{content:"";position:absolute;left:19px;top:10px;bottom:10px;width:1px;background:var(--line-2)}
.tl-item{position:relative;padding:0 0 42px 62px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:10px;top:3px;width:20px;height:20px;border-radius:50%;background:var(--night);
  border:1px solid var(--amber);display:grid;place-items:center}
.tl-dot::after{content:"";width:7px;height:7px;border-radius:50%;background:var(--amber)}
.tl-item .when{font-family:"DM Mono",monospace;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--amber)}
.tl-item h3{font-size:22px;margin:7px 0 9px}
.tl-item p{color:var(--text-2);font-size:16px}

/* steps */
.steps{counter-reset:s}
.step{counter-increment:s;display:grid;gap:8px 28px;grid-template-columns:1fr;padding:30px 0;border-top:1px solid var(--line)}
@media(min-width:840px){.step{grid-template-columns:76px 1fr 1.3fr;align-items:start}}
.step:last-child{border-bottom:1px solid var(--line)}
.step .no{font-family:"DM Mono",monospace;font-size:13px;color:var(--altim)}
.step .no::before{content:counter(s,decimal-leading-zero)}
.step h3{font-size:21px}
.step p{color:var(--text-2);font-size:16px}

/* figures */
.figs{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
@media(min-width:840px){.figs{grid-template-columns:repeat(4,1fr)}}
.fig{background:var(--panel);padding:34px 24px}
.fig b{display:block;font-size:40px;font-weight:600;color:var(--amber);line-height:1}
.fig.c b{color:var(--altim)}.fig.h b{color:var(--horizon)}
.fig span{font-family:"DM Mono",monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-3);margin-top:8px;display:block}

/* split */
.split{display:grid;gap:46px}
@media(min-width:920px){.split{grid-template-columns:1fr 1fr;gap:64px;align-items:center}}
.split p{color:var(--text-2);font-size:17px}
.split p+p{margin-top:15px}
.split strong{color:var(--text);font-weight:600}

/* checks */
.checks li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.checks li:last-child{border-bottom:0}
.checks svg{width:21px;height:21px;flex:none;stroke:var(--altim);fill:none;stroke-width:2.3;stroke-linecap:round;stroke-linejoin:round;margin-top:3px}
.checks.w svg{stroke:var(--warn)}
.checks b{display:block;font-weight:600;margin-bottom:2px}
.checks span{color:var(--text-2);font-size:15.5px}

/* note */
.note{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--amber);border-radius:var(--r);padding:24px 28px}
.note.c{border-left-color:var(--altim)}
.note.w{border-left-color:var(--warn)}
.note p{color:var(--text-2);font-size:16.5px}
.note p+p{margin-top:12px}
.note strong{color:var(--text)}

/* kv */
.kv{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--panel)}
.kv .row{display:flex;justify-content:space-between;gap:16px;padding:15px 20px;font-size:16px}
.kv .row+.row{border-top:1px solid var(--line)}
.kv .row span{color:var(--text-3)}
.kv .row b{font-family:"DM Mono",monospace;font-weight:400;font-size:14.5px;text-align:right;color:var(--text)}
.kv .row b.hl{color:var(--amber)}

.todo{background:rgba(240,168,48,.14);color:var(--amber);padding:1px 7px;border-radius:4px;font-family:"DM Mono",monospace;font-size:.84em}

/* banner */
.banner{position:relative;border-bottom:1px solid var(--line);padding:74px 0 58px;overflow:hidden;
  background:radial-gradient(90% 80% at 85% 0%,rgba(240,168,48,.1),transparent 55%)}
.banner.c{background:radial-gradient(90% 80% at 85% 0%,rgba(91,211,224,.1),transparent 55%)}
.banner.w{background:radial-gradient(90% 80% at 85% 0%,rgba(255,107,94,.1),transparent 55%)}
.banner h1{font-size:clamp(36px,5.8vw,64px);margin-top:16px}
.banner h1 em{font-family:"Instrument Serif",Georgia,serif;font-style:italic;font-weight:400;color:var(--amber)}
.banner p{color:var(--text-2);font-size:18.5px;margin-top:18px;max-width:60ch}

/* CTA */
.cta{border-radius:16px;padding:58px 36px;text-align:center;position:relative;overflow:hidden;
  background:radial-gradient(80% 120% at 50% 0%,rgba(240,168,48,.13),transparent 60%),var(--panel);border:1px solid var(--edge)}
.cta h2{font-size:clamp(28px,4.4vw,44px)}
.cta p{color:var(--text-2);margin:15px auto 28px;max-width:48ch;font-size:17px}
.mail-btn{display:inline-flex;align-items:center;gap:11px;font-family:"DM Mono",monospace;
  font-size:clamp(13.5px,1.9vw,17px);border:1px solid var(--edge-2);border-radius:40px;padding:14px 24px;
  background:var(--night-2);color:var(--text);transition:transform .2s var(--ease),border-color .2s;word-break:break-all}
.mail-btn:hover{transform:translateY(-2px);border-color:var(--amber)}
.mail-btn svg{width:18px;height:18px;stroke:var(--amber);fill:none;stroke-width:1.9;flex:none}

/* footer */
.foot{background:var(--night-2);border-top:1px solid var(--line);padding:56px 0 28px}
.foot-grid{display:grid;gap:34px;padding-bottom:32px;border-bottom:1px solid var(--line)}
@media(min-width:780px){.foot-grid{grid-template-columns:1.8fr 1fr 1fr 1fr}}
.foot-grid>div>p{color:var(--text-3);font-size:14.5px;margin-top:14px;max-width:34ch}
.foot h4{font-family:"DM Mono",monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin-bottom:15px}
.foot li{margin-bottom:10px}
.foot li a{color:var(--text-2);font-size:14.5px;transition:color .2s;word-break:break-word}
.foot li a:hover{color:var(--amber)}
.foot-end{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;padding-top:24px;font-size:13px;color:var(--faint)}
.foot-end .warn{color:var(--warn);font-family:"DM Mono",monospace;font-size:12px}

/* prose */
.prose{max-width:840px;padding:52px 0 84px}
.prose h2{font-size:25px;margin:38px 0 12px}
.prose h3{font-size:19px;margin:24px 0 9px}
.prose p,.prose li{color:var(--text-2);font-size:16.5px}
.prose p{margin-bottom:13px}
.prose ul{margin-bottom:17px}
.prose li{position:relative;padding-left:22px;margin-bottom:8px}
.prose li::before{content:"";position:absolute;left:4px;top:11px;width:7px;height:7px;background:var(--amber);transform:rotate(45deg)}
.prose a{color:var(--amber);border-bottom:1px solid rgba(240,168,48,.35)}
.prose .upd{font-family:"DM Mono",monospace;font-size:12.5px;color:var(--faint);margin-bottom:10px}
.prose code{font-family:"DM Mono",monospace;font-size:14px;background:var(--panel);padding:2px 6px;border-radius:4px;color:var(--amber)}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
}