/* ================================================================
   StepsFlow — linha do tempo em zigue-zague com caminho progressivo.
   Reimplementação vanilla do componente Framer "StepsFlow": mesmos
   mecanismos (caminho que preenche com o scroll, pontos, números com
   mola, imagens entrando de baixo), sem React nem framer-motion.
   Carregado só na página que usa (via $extra_head).
   ================================================================ */

.sf{position:relative;z-index:1;background:var(--bg);padding:96px 0}
.sf__head{max-width:var(--maxw);margin:0 auto 64px;padding:0 var(--pad)}
.sf__head h2{margin-top:16px;max-width:20ch}

.sf__flow{
  position:relative;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);
  display:flex;flex-direction:column;gap:0;
}

/* ---------- o caminho ---------- */
.sf__trilho{
  position:absolute;left:50%;top:0;bottom:0;width:1px;transform:translateX(-.5px);
  background:var(--line);z-index:0;
}
.sf__trilho::after{                       /* preenchimento que cresce com o scroll */
  content:"";position:absolute;left:0;top:0;width:100%;
  height:calc(var(--sf-progresso,0) * 100%);
  background:var(--ink);
  transition:height .12s linear;
}

/* ---------- um passo ---------- */
.sf__p{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr 96px 1fr;align-items:center;
  gap:0;padding:52px 0;
}
.sf__p:first-child{padding-top:0}
.sf__p:last-child{padding-bottom:0}

.sf__midia{grid-column:1;padding-right:64px}
.sf__corpo{grid-column:3;padding-left:64px}
/* zigue-zague: nos pares, inverte os lados */
.sf__p:nth-child(even) .sf__midia{grid-column:3;padding-right:0;padding-left:64px}
.sf__p:nth-child(even) .sf__corpo{grid-column:1;padding-left:0;padding-right:64px;text-align:right}
.sf__p:nth-child(even) .sf__n{margin-left:auto}
.sf__p:nth-child(even) .sf__n::after{order:-1}

/* ---------- ponto no caminho ---------- */
.sf__ponto{
  grid-column:2;justify-self:center;
  width:13px;height:13px;border-radius:50%;
  background:var(--bg);border:1px solid var(--line);
  position:relative;z-index:2;
  transition:background .45s ease,border-color .45s ease,transform .45s cubic-bezier(.22,.61,.36,1);
}
.sf__p.is-on .sf__ponto{background:var(--ink);border-color:var(--ink);transform:scale(1.32)}

/* ---------- imagem ---------- */
.sf__midia figure{overflow:hidden;border:1px solid var(--line);background:var(--bg-2)}
.sf__midia img{
  width:100%;height:auto;display:block;
  opacity:0;transform:translateY(38px) scale(1.05);
  transition:opacity .6s cubic-bezier(.42,0,.58,1),transform .8s cubic-bezier(.42,0,.58,1);
}
.sf__p.is-on .sf__midia img{opacity:1;transform:none}

/* ---------- texto ---------- */
.sf__n{
  display:flex;align-items:center;gap:16px;
  font-family:var(--display);font-size:15px;letter-spacing:.12em;color:var(--muted);
  opacity:0;transform:translateY(14px);
  transition:opacity .5s cubic-bezier(.42,0,.58,1) .15s,transform .5s cubic-bezier(.42,0,.58,1) .15s,color .45s ease;
}
.sf__n::after{content:"";height:1px;width:0;background:var(--ink);transition:width .7s cubic-bezier(.22,.61,.36,1) .25s}
.sf__p.is-on .sf__n{opacity:1;transform:none;color:var(--ink)}
.sf__p.is-on .sf__n::after{width:44px}

.sf__corpo h3{
  font-size:clamp(24px,2.8vw,32px);margin:14px 0 10px;
  opacity:0;transform:translateY(18px);
  transition:opacity .5s cubic-bezier(.42,0,.58,1) .15s,transform .5s cubic-bezier(.42,0,.58,1) .15s;
}
.sf__corpo p{
  font-size:16.5px;line-height:1.68;color:var(--ink-2);max-width:42ch;
  opacity:0;transform:translateY(18px);
  transition:opacity .5s cubic-bezier(.42,0,.58,1) .3s,transform .5s cubic-bezier(.42,0,.58,1) .3s;
}
.sf__p:nth-child(even) .sf__corpo p{margin-left:auto}
.sf__p.is-on .sf__corpo h3,
.sf__p.is-on .sf__corpo p{opacity:1;transform:none}

/* ---------- responsivo ---------- */
@media (max-width:860px){
  .sf{padding:64px 0}
  .sf__head{margin-bottom:40px}
  /* empilha: caminho encosta à esquerda e todo o conteúdo vai para a direita */
  .sf__flow{padding-left:calc(var(--pad) + 30px)}
  .sf__trilho{left:var(--pad);transform:none}
  .sf__p{grid-template-columns:1fr;padding:34px 0;gap:18px}
  .sf__midia,.sf__corpo,
  .sf__p:nth-child(even) .sf__midia,
  .sf__p:nth-child(even) .sf__corpo{
    grid-column:1;padding:0;text-align:left;
  }
  .sf__p:nth-child(even) .sf__corpo p{margin-left:0}
  .sf__p:nth-child(even) .sf__n{margin-left:0}
  .sf__midia{order:2;max-width:320px}
  .sf__corpo{order:1}
  .sf__ponto{position:absolute;left:calc(-30px - var(--pad) + var(--pad) - 6px);top:40px;grid-column:1}
  .sf__corpo h3{font-size:22px}
  .sf__corpo p{font-size:15.5px;max-width:none}
}

@media (prefers-reduced-motion:reduce){
  .sf__midia img,.sf__n,.sf__corpo h3,.sf__corpo p{opacity:1;transform:none;transition:none}
  .sf__n::after{width:44px}
  .sf__trilho::after{transition:none}
}