/* ==========================================================================
   Compre Sempre USA — sistema visual do site
   Direção: porcelana, alumínio e vidro (o mundo de uma Apple Store).
   O azul-elétrico é o único acento e aparece só em ação e varredura;
   verde e vermelho ficam reservados para estado de estoque.
   ========================================================================== */

:root{
  --bg:#F1F4F6;
  --surface:#FFFFFF;
  --surface-2:#F7F9FA;
  --ink:#0B1215;
  --ink-dim:#5C6E76;
  --edge:#DBE3E7;
  --edge-soft:#EAEFF2;

  --volt:#1533E0;
  --volt-deep:#0E27B6;
  --volt-wash:#E9EDFD;

  --live:#0A7F45;
  --live-wash:#E2F1E9;
  --out:#9E2F27;
  --out-wash:#F6E8E6;

  --dark-bg:#080D0F;
  --dark-ink:#EEF4F5;
  --dark-dim:#8FA3AA;
  --dark-edge:#1D272B;

  --display:"Bricolage Grotesque",-apple-system,BlinkMacSystemFont,sans-serif;
  --body:"Public Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --wrap:1180px;
  --gutter:24px;
  --radius:14px;
  --radius-sm:8px;
}

@media (prefers-color-scheme:dark){
  :root{
    --bg:#080F12;
    --surface:#101A1E;
    --surface-2:#16232A;
    --ink:#E8F1F3;
    --ink-dim:#92A6AD;
    --edge:#223036;
    --edge-soft:#182329;

    --volt:#7B90FF;
    --volt-deep:#93A5FF;
    --volt-wash:#151E45;

    --live:#43D18C;
    --live-wash:#0F2A20;
    --out:#FF8378;
    --out-wash:#2B1917;

    --dark-bg:#04080A;
    --dark-ink:#EEF4F5;
    --dark-dim:#8FA3AA;
    --dark-edge:#162024;
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body);
  font-size:17px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gutter)}
.narrow{max-width:62ch}

a{color:var(--volt);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2.5px solid var(--volt);outline-offset:3px;border-radius:3px}

/* ---------------------------------------------------------------- tipografia */
.display{
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(2.7rem,6.4vw,5rem);
  line-height:.98;
  letter-spacing:-.035em;
  margin:0;
  text-wrap:balance;
}
h2{
  font-family:var(--display);
  font-weight:700;
  font-size:clamp(1.8rem,3.4vw,2.7rem);
  line-height:1.08;
  letter-spacing:-.028em;
  margin:0 0 14px;
  text-wrap:balance;
}
h3{
  font-family:var(--display);
  font-weight:600;
  font-size:1.15rem;
  letter-spacing:-.015em;
  margin:0 0 6px;
}
p{margin:0 0 18px}
.lead{font-size:clamp(1.1rem,1.7vw,1.3rem);color:var(--ink-dim);line-height:1.5}

.eyebrow{
  font-family:var(--mono);
  font-size:.7rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ink-dim);
  margin:0 0 16px;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::after{content:"";flex:1;height:1px;background:var(--edge);max-width:80px}

/* ---------------------------------------------------------------- estrutura */
.band{padding:clamp(64px,9vw,120px) 0}
.band-surface{background:var(--surface);border-block:1px solid var(--edge)}
.band-dark{
  --ink:#EEF4F5;
  --ink-dim:#93A6AD;
  --edge:#1D272B;
  --edge-soft:#1D272B;
  --volt:#98A8FF;   /* legivel sobre quase-preto nos dois temas */
  --out:#FF8B80;
  --live:#4BD695;
  background:var(--dark-bg);
  color:var(--ink);
}

/* ---------------------------------------------------------------- controles */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:var(--body);font-size:1rem;font-weight:600;letter-spacing:-.01em;
  padding:14px 26px;border-radius:var(--radius-sm);border:1px solid transparent;
  background:var(--volt);color:#fff;cursor:pointer;
  transition:transform .12s ease,background .12s ease;
}
.btn:hover{background:var(--volt-deep);text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-quiet{background:transparent;color:var(--ink);border-color:var(--edge)}
.btn-quiet:hover{background:var(--surface);border-color:var(--ink-dim);color:var(--ink)}
.btn-lg{padding:17px 32px;font-size:1.05rem}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}

/* ---------------------------------------------------------------- navegação */
.nav{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;
}
.brand{
  font-family:var(--display);font-weight:700;font-size:1.08rem;
  letter-spacing:-.03em;color:var(--ink);display:inline-flex;align-items:center;gap:9px;
  white-space:nowrap;
}
.brand:hover{text-decoration:none}
.brand-mark{
  width:11px;height:11px;border-radius:50%;
  background:var(--live);
  box-shadow:0 0 0 4px var(--live-wash);
  flex:none;
}
.nav-actions{display:flex;align-items:center;gap:10px}
.rotulo-curto{display:none}

@media(max-width:620px){
  /* A barra de topo tem pouco espaço: a marca não quebra, o login perde a
     moldura de botão e o CTA encurta. */
  .nav{padding:16px 0}
  .brand{font-size:.98rem;white-space:nowrap}
  .nav-actions{gap:4px}
  .nav-actions .btn-quiet{background:none;border-color:transparent;padding:10px 8px;font-size:.94rem}
  .nav-actions .btn{padding:11px 16px;font-size:.94rem}
  .rotulo-largo{display:none}
  .rotulo-curto{display:inline}
}

/* ---------------------------------------------------------------- rodapé */
.foot{
  border-top:1px solid var(--edge);
  padding:44px 0 60px;
  color:var(--ink-dim);
  font-size:.9rem;
}
.foot-links{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:16px}
.foot-legal{max-width:70ch;line-height:1.55}

/* ---------------------------------------------------------------- utilidades */
.mono{font-family:var(--mono);font-size:.85em;letter-spacing:-.01em}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.tnum{font-variant-numeric:tabular-nums}

/* ---------------------------------------------------------------- documentos
   Páginas de texto corrido: robô, termos, privacidade. */
.doc{padding:clamp(40px,6vw,72px) 0 clamp(60px,8vw,96px);max-width:74ch}
.doc h1{font-size:clamp(2.1rem,4.6vw,3.2rem)}
.doc h2{font-size:clamp(1.35rem,2.3vw,1.8rem);margin:44px 0 12px}
.doc h2:first-of-type{margin-top:34px}
.doc h3{margin:26px 0 6px}
.doc p,.doc li{color:var(--ink-dim)}
.doc ul{padding-left:0;list-style:none;margin:0 0 20px}
.doc li{display:flex;gap:12px;padding:9px 0;border-top:1px solid var(--edge-soft);line-height:1.55}
.doc li:first-child{border-top:0}
.doc li svg{flex:none;margin-top:5px}
.doc code{
  font-family:var(--mono);font-size:.86em;background:var(--volt-wash);
  padding:1px 6px;border-radius:4px;color:var(--ink);
}
.doc-date{
  font-family:var(--mono);font-size:.75rem;letter-spacing:.06em;color:var(--ink-dim);
  border-top:1px solid var(--edge);padding-top:16px;margin-top:40px;
}
.doc-todo{
  border-left:2px solid var(--volt);background:var(--volt-wash);
  padding:14px 18px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:.92rem;color:var(--ink);margin:0 0 26px;
}