/* article-docs — página de chegada. Escuro, verde institucional e a cena 3D ao fundo. */
:root{
  --g:#2fbf55; --g-dk:#138a07; --g-lt:#7ee59a;
  --ink:#eef3ef; --ink-2:#a9b6ad; --line:rgba(255,255,255,.12);
  --bg:#0a0f0c; --bg-2:#0f1712; --card:rgba(255,255,255,.04);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:Georgia,"Times New Roman",serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* cena 3D e véu de leitura */
#cena{position:fixed;inset:0;width:100%;height:100%;display:block;z-index:0}
.veu{position:fixed;inset:0;z-index:1;pointer-events:none;
  /* escurece o suficiente para o texto ler, sem apagar a constelação */
  background:
    radial-gradient(ellipse 90% 55% at 50% 42%,rgba(10,15,12,.72) 0%,rgba(10,15,12,.42) 55%,rgba(10,15,12,.12) 100%),
    linear-gradient(180deg,rgba(10,15,12,.55) 0%,rgba(10,15,12,.15) 22%,rgba(10,15,12,.55) 78%,var(--bg) 100%)}
main,.lp-top,.lp-foot{position:relative;z-index:2}

/* topo */
.lp-top{display:flex;align-items:center;gap:22px;padding:16px 28px;
  backdrop-filter:blur(8px);background:rgba(10,15,12,.55);border-bottom:1px solid var(--line);
  position:sticky;top:0}
.lp-brand{display:flex;align-items:center;gap:9px;font-weight:600;letter-spacing:.2px}
.lp-brand img{border-radius:6px}
.lp-nav{display:flex;gap:20px;margin-left:14px;font-size:14px;color:var(--ink-2)}
.lp-nav a:hover{color:var(--g-lt)}
.lp-top-acts{margin-left:auto;display:flex;align-items:center;gap:12px}
.lp-lang{font-size:13px;color:var(--ink-2);border:1px solid var(--line);border-radius:16px;padding:6px 12px}
.lp-lang:hover{color:var(--ink);border-color:var(--g)}
.lp-btn{display:inline-block;background:var(--g-dk);color:#fff;border-radius:6px;padding:10px 18px;
  font-size:14px;font-weight:600;border:1px solid rgba(255,255,255,.08);
  transition:transform .14s ease,background .14s ease,box-shadow .14s ease}
.lp-btn:hover{background:var(--g);transform:translateY(-1px);box-shadow:0 8px 24px rgba(47,191,85,.22)}
.lp-btn.ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.lp-btn.ghost:hover{border-color:var(--g);background:rgba(47,191,85,.08);box-shadow:none}
.lp-btn.big{padding:14px 26px;font-size:15.5px}

/* hero */
.lp-hero{max-width:920px;margin:0 auto;padding:16vh 24px 12vh;text-align:center}
.lp-kicker{margin:0 0 18px;font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--g-lt)}
.lp-hero h1{margin:0 0 20px;font-family:var(--serif);font-weight:400;letter-spacing:-.5px;
  font-size:clamp(2.3rem,6.4vw,4.3rem);line-height:1.08}
.grad{background:linear-gradient(100deg,var(--g-lt),var(--g) 45%,#bff0cb);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lp-sub{margin:0 auto 32px;max-width:660px;font-size:clamp(1rem,2.1vw,1.16rem);color:var(--ink-2)}
.lp-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.lp-trust{margin:34px 0 0;font-family:var(--mono);font-size:12px;color:rgba(169,182,173,.7);letter-spacing:.04em}

/* seções */
.lp-sec{max-width:1120px;margin:0 auto;padding:8vh 24px}
.lp-sec h2,.lp-rule h2,.lp-final h2{font-family:var(--serif);font-weight:400;
  font-size:clamp(1.6rem,3.4vw,2.3rem);margin:0 0 34px;letter-spacing:-.3px}
.lp-steps{list-style:none;margin:0;padding:0;display:grid;gap:20px;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.lp-steps li{position:relative;padding:26px 22px;border:1px solid var(--line);border-radius:10px;
  background:rgba(10,15,12,.66);backdrop-filter:blur(6px)}
.lp-steps .num{font-family:var(--mono);font-size:12px;color:var(--g-lt);letter-spacing:.1em}
.lp-steps h3,.lp-card h3,.lp-who h3{margin:10px 0 8px;font-size:17px;font-weight:600}
.lp-steps p,.lp-card p,.lp-who p{margin:0;color:var(--ink-2);font-size:14.5px}

.lp-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.lp-card{padding:24px 22px;border:1px solid var(--line);border-radius:10px;background:rgba(10,15,12,.66);backdrop-filter:blur(6px);
  transition:transform .18s ease,border-color .18s ease,background .18s ease}
.lp-card:hover{transform:translateY(-3px);border-color:rgba(47,191,85,.4);background:rgba(47,191,85,.06)}
.lp-card .ico{display:grid;place-items:center;width:38px;height:38px;border-radius:9px;
  background:rgba(47,191,85,.12);color:var(--g-lt);font-size:18px}

.lp-rule{max-width:860px;margin:6vh auto;padding:38px 30px;border-radius:14px;text-align:center;
  border:1px solid rgba(47,191,85,.28);backdrop-filter:blur(6px);
  background:linear-gradient(180deg,rgba(47,191,85,.12),rgba(10,15,12,.72))}
.lp-rule p{margin:0;color:var(--ink);font-size:16.5px;line-height:1.7}
.lp-rule em{font-family:var(--mono);font-style:normal;color:var(--g-lt);font-size:15px}

.lp-who{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.lp-who > div{padding-left:16px;border-left:2px solid rgba(47,191,85,.35)}

.lp-final{max-width:720px;margin:0 auto;padding:10vh 24px 12vh;text-align:center}
.lp-final p{color:var(--ink-2);margin:0 0 28px}

.lp-foot{border-top:1px solid var(--line);padding:26px 28px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;color:var(--ink-2);font-size:13px;background:rgba(10,15,12,.6)}
.lp-foot p{margin:0}
.lp-foot-links{display:flex;gap:10px}
.lp-foot-links a:hover{color:var(--g-lt)}

/* entrada suave dos blocos */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.reveal.vis{opacity:1;transform:none}

@media (max-width:820px){
  .lp-top{padding:12px 16px;gap:12px}
  .lp-nav{display:none}
  .lp-hero{padding:11vh 18px 8vh}
  .lp-sec{padding:6vh 18px}
  .lp-rule{margin:4vh 16px;padding:26px 20px}
  .lp-btn.big{width:100%;text-align:center}
  .lp-cta{flex-direction:column}
  .lp-foot{flex-direction:column}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  #cena{display:none}
  .veu{background:radial-gradient(ellipse at 50% 0%,#12241a,var(--bg) 70%)}
}

/* crédito do autor */
.lp-credito{display:inline-block;margin-top:6px;color:rgba(169,182,173,.85)}
.lp-credito a{color:var(--g-lt);border-bottom:1px solid rgba(126,229,154,.35)}
.lp-credito a:hover{color:#bff0cb;border-bottom-color:var(--g-lt)}