/* ============================================================================
   usekos.com · sistema de design
   Paleta da marca: azul #01B1FF (detalhe) / #0374B5 (ação) · laranja #FD8000
   Regra que governa tudo: azul = ação e máquina; laranja = decisão humana.
   ========================================================================== */
:root{
  --paper:#F5F6F3;
  --card:#FFFFFF;
  --ink:#15181C;
  --steel:#5B6570;
  --line:#E1E3DE;
  --signal:#0374B5;
  --signal-dark:#025E92;
  --bright:#01B1FF;
  --human:#C25E00;
  --human-dot:#FD8000;
  --dark:#101317;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Archivo',system-ui,sans-serif;background:var(--paper);color:var(--ink);
     font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.hl-human{color:var(--human);font-weight:600}

/* revelação */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}
.rv.d1{transition-delay:.1s}.rv.d2{transition-delay:.22s}.rv.d3{transition-delay:.34s}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  .log-line{animation:none!important;opacity:1!important}
  .rail::before{transform:none!important}
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* nav */
nav{position:sticky;top:0;z-index:50;background:rgba(245,246,243,.88);
    backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo img{height:30px;width:auto;display:block}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{text-decoration:none;font-size:15px;font-weight:500;color:var(--steel)}
.nav-links a:hover{color:var(--ink)}
.nav-links a.on{color:var(--signal);font-weight:600}
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--signal);color:#fff;
     text-decoration:none;font-weight:600;font-size:16px;padding:13px 24px;border-radius:8px;
     transition:background .2s,transform .2s}
.btn:hover{background:var(--signal-dark);transform:translateY(-1px)}
.btn:focus-visible,a:focus-visible{outline:3px solid var(--signal);outline-offset:3px}
.btn.small{padding:9px 16px;font-size:14px}
.btn svg{flex:none}
@media(max-width:860px){.nav-links a:not(.btn){display:none}}

/* hero */
.hero{padding:84px 0 64px}
.hero.curto{padding:72px 0 56px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:40px}}
.eyebrow{font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--steel);
         text-transform:lowercase;display:flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--bright)}
h1{font-size:clamp(36px,4.9vw,55px);font-weight:900;line-height:1.05;letter-spacing:-.03em;margin:18px 0 22px}
h1 em{font-style:normal;color:var(--signal)}
.lead{font-size:19px;color:var(--steel);max-width:34em;margin-bottom:32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.ghost{font-weight:600;font-size:16px;text-decoration:none;color:var(--ink);
       border-bottom:2px solid var(--signal);padding-bottom:2px}
.ghost:hover{color:var(--signal)}
.hero-visual{position:relative}
.hero-photo{border-radius:14px;overflow:hidden;aspect-ratio:4/4.2;box-shadow:0 24px 60px -24px rgba(16,19,23,.35)}
.hero-photo img{width:100%;height:100%;object-fit:cover}
.log-card{position:absolute;left:-42px;bottom:30px;width:min(340px,86%);background:var(--dark);
          color:#C6CCD2;border-radius:12px;padding:18px 20px 14px;
          font-family:var(--mono);font-size:12.5px;line-height:2.05;
          box-shadow:0 20px 50px -18px rgba(16,19,23,.55)}
@media(max-width:900px){.log-card{left:16px;bottom:18px}}
.log-head{display:flex;gap:6px;margin-bottom:10px}
.log-head i{width:9px;height:9px;border-radius:50%;background:#2C333B;display:block}
.log-line{display:flex;justify-content:space-between;gap:12px;opacity:0;white-space:nowrap;overflow:hidden}
.log-line .h{color:#525C66}
.log-line.human .t{color:#FF9D42;font-weight:500}
.log-line:nth-child(2){animation:lg .5s .5s forwards}
.log-line:nth-child(3){animation:lg .5s 1.4s forwards}
.log-line:nth-child(4){animation:lg .5s 2.3s forwards}
.log-line:nth-child(5){animation:lg .5s 3.2s forwards}
.log-line:nth-child(6){animation:lg .5s 4.1s forwards}
@keyframes lg{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.log-foot{margin-top:10px;padding-top:10px;border-top:1px solid #232930;color:#525C66;font-size:11.5px}

/* números do problema */
.nums{background:var(--dark);color:#EDEFF1}
.nums .wrap{padding-top:56px;padding-bottom:56px}
.nums-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
@media(max-width:800px){.nums-grid{grid-template-columns:1fr;gap:28px}}
.num b{display:block;font-size:clamp(38px,4.5vw,54px);font-weight:900;letter-spacing:-.03em;
       color:var(--bright);line-height:1}
.num span{display:block;margin-top:10px;font-size:15.5px;color:#B9C0C7}
.num i{display:block;margin-top:8px;font-style:normal;font-family:var(--mono);font-size:11.5px;color:#6A737C}

/* seções */
section{padding:96px 0;scroll-margin-top:70px}
.sec-head{max-width:660px;margin-bottom:56px}
h2{font-size:clamp(30px,3.8vw,44px);font-weight:900;letter-spacing:-.025em;line-height:1.1;margin:14px 0 16px}
.sec-head p{color:var(--steel);font-size:18px}

/* diagnóstico / listas com foto */
.prob-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
@media(max-width:900px){.prob-grid{grid-template-columns:1fr}}
.prob-photo{border-radius:14px;overflow:hidden;aspect-ratio:4/3}
.prob-photo img{width:100%;height:100%;object-fit:cover;filter:saturate(.85)}
.prob-list{display:flex;flex-direction:column}
.prob-item{padding:22px 0;border-top:1px solid var(--line)}
.prob-item:last-child{border-bottom:1px solid var(--line)}
.prob-item b{display:block;font-size:19px;font-weight:800;letter-spacing:-.01em;margin-bottom:6px}
.prob-item p{color:var(--steel);font-size:16px}
.photo-credit{font-family:var(--mono);font-size:11px;color:var(--steel);margin-top:8px}

/* as três frentes (cards-link) */
.tres{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.frentes{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.frentes{grid-template-columns:1fr}}
.frente{display:block;text-decoration:none;background:var(--paper);border:1px solid var(--line);
        border-radius:14px;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease}
.frente:hover{transform:translateY(-5px);box-shadow:0 22px 46px -22px rgba(16,19,23,.28)}
.f-foto{aspect-ratio:16/9;overflow:hidden}
.f-foto img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.frente:hover .f-foto img{transform:scale(1.04)}
.frente .ev{font-family:var(--mono);font-size:12.5px;color:var(--steel);padding:18px 24px 0}
.frente .ev.human{color:var(--human);font-weight:500}
.frente h3{font-size:22px;font-weight:800;letter-spacing:-.015em;padding:6px 24px 0}
.frente p:not(.ev){color:var(--steel);font-size:15.5px;padding:8px 24px 0}
.f-link{display:inline-block;margin:14px 24px 22px;font-weight:600;font-size:15px;color:var(--signal)}
.frente:hover .f-link{text-decoration:underline}

/* cadeia de eventos */
.chain{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.rail{position:relative;max-width:760px;margin:0 auto}
.rail::before{content:"";position:absolute;left:19px;top:8px;bottom:8px;width:2px;
              background:linear-gradient(var(--bright) 0 0);background-color:var(--line);
              background-repeat:no-repeat;background-size:100% calc(var(--draw,0)*100%);
              transition:background-size .2s linear}
.step{position:relative;padding:0 0 52px 72px}
.step:last-child{padding-bottom:0}
.node{position:absolute;left:8px;top:2px;width:24px;height:24px;border-radius:50%;
      background:var(--card);border:2px solid var(--steel);display:flex;align-items:center;justify-content:center}
.node i{width:8px;height:8px;border-radius:50%;background:var(--steel);display:block}
.step.human .node{border-color:var(--human-dot)}
.step.human .node i{background:var(--human-dot)}
.ev{font-family:var(--mono);font-size:13px;color:var(--steel);letter-spacing:.02em}
.step.human .ev{color:var(--human);font-weight:500}
.step h3{font-size:23px;font-weight:800;letter-spacing:-.015em;margin:6px 0 8px}
.step p{color:var(--steel);max-width:36em}
.step .who{display:inline-block;font-size:13px;font-weight:600;margin-top:12px;
           padding:4px 12px;border-radius:20px;border:1px solid var(--line);color:var(--steel)}
.step.human .who{border-color:rgba(253,128,0,.5);color:var(--human)}
.chain-note{max-width:760px;margin:64px auto 0;padding:26px 30px;border-radius:12px;
            background:var(--paper);border:1px solid var(--line);display:flex;gap:18px;align-items:flex-start}
.chain-note .ico{flex:none;width:40px;height:40px;border-radius:10px;background:var(--dark);
                 display:flex;align-items:center;justify-content:center}
.chain-note b{display:block;margin-bottom:4px;font-size:17px}
.chain-note p{color:var(--steel);font-size:15.5px}

/* princípios / regras */
.prin-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media(max-width:800px){.prin-grid{grid-template-columns:1fr}}
.prin{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:34px 32px;
      transition:transform .25s ease,box-shadow .25s ease}
.prin:hover{transform:translateY(-4px);box-shadow:0 18px 40px -22px rgba(16,19,23,.25)}
.prin .num{font-family:var(--mono);font-size:13px;color:var(--signal);font-weight:500}
.prin h3{font-size:21px;font-weight:800;letter-spacing:-.015em;margin:12px 0 10px}
.prin p{color:var(--steel);font-size:16px}

/* statement escuro */
.state{background:var(--dark);color:#EDEFF1}
.state-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:center}
@media(max-width:900px){.state-grid{grid-template-columns:1fr;gap:40px}}
.state-photo{border-radius:14px;overflow:hidden;aspect-ratio:4/3.4}
.state-photo img{width:100%;height:100%;object-fit:cover}
.state .eyebrow{color:#8A939C}
.state h2{color:#fff}
.state p.big{font-size:19px;color:#B9C0C7;margin-bottom:18px}
.state p.big b{color:#fff}

/* CTA */
.cta{position:relative;overflow:hidden;background:var(--dark)}
.cta-bg{position:absolute;inset:0;opacity:.28}
.cta-bg img{width:100%;height:100%;object-fit:cover}
.cta-in{position:relative;text-align:center;max-width:680px;margin:0 auto;padding:110px 24px}
.cta h2{color:#fff;font-size:clamp(32px,4.4vw,48px)}
.cta p{color:#C4CAD0;font-size:19px;margin:18px 0 36px}
.cta .btn{font-size:18px;padding:17px 34px}
.cta .fine{font-family:var(--mono);font-size:12.5px;color:#7A838C;margin-top:22px}

/* rodapé */
footer{padding:40px 0;border-top:1px solid var(--line)}
.foot-in{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.foot-links{display:flex;gap:10px;align-items:center;font-size:13.5px;color:var(--steel)}
.foot-links a{color:var(--steel);text-decoration:none}
.foot-links a:hover{color:var(--ink)}
footer p{font-size:13.5px;color:var(--steel)}
footer p a{color:var(--steel)}