/* ---------- 3 · Como funciona (o papel) ---------- */
/* a transição 2 → 3: a noite vira papel numa curva de horizonte, com a luz do amanhecer na borda */
.como{margin-top:-64px;border-radius:50% 50% 0 0 / 64px 64px 0 0;padding-top:clamp(120px,13vw,170px);box-shadow:0 -1px 0 rgb(255 198 26 / .55),0 -18px 60px -10px rgb(255 198 26 / .28)}
.como::before{content:"";position:absolute;inset:0 0 auto;height:420px;z-index:-1;background:radial-gradient(60% 100% at 50% 0%,rgb(255 214 120 / .35),transparent 70%)}
.como__cab{max-width:860px}
.como__cab h2 span{display:block;margin-top:.35em;font-family:var(--texto);font-weight:500;font-size:clamp(18px,1.6vw,22px);letter-spacing:0;line-height:1.5;color:var(--tinta-2)}
.passos{--cena-h:220px;list-style:none;padding:0;margin:clamp(40px,5vw,64px) 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2vw,28px);position:relative}
/* o fio que atravessa os 3 passos, na altura dos números, acendendo com a rolagem */
.passos::before,.passos::after{content:"";position:absolute;left:4%;right:4%;top:calc(var(--cena-h) + 2px);height:2px;z-index:0}
.passos::before{background:var(--linha-papel)}
.passos::after{background:linear-gradient(90deg,var(--sol),var(--folha));transform-origin:left;transform:scaleX(0);transition:transform 1.6s var(--ease) .4s}
.passos.visto::after{transform:scaleX(1)}
@supports (animation-timeline: view()){ .passos::after{transition:none;animation:enche-x linear both;animation-timeline:view();animation-range:entry 30% cover 55%} @keyframes enche-x{to{transform:scaleX(1)}} }
.passo{position:relative;z-index:1;background:#fffdf8;border:1px solid var(--linha-papel);border-radius:24px;padding:0 0 26px;overflow:hidden;box-shadow:0 1px 0 rgb(10 28 43 / .04),0 24px 48px -32px rgb(10 28 43 / .35)}
.passo h3{margin:16px 24px 0;font-family:var(--manchete);font-weight:var(--m-peso);font-size:clamp(22px,1.9vw,26px);letter-spacing:-.02em;color:var(--tinta)}
.passo p{margin:8px 24px 0;color:var(--tinta-2)}
.passo__n{position:relative;z-index:1;display:inline-grid;place-items:center;margin:-22px 0 0 24px;width:44px;height:44px;border-radius:50%;background:var(--tinta);color:var(--sol);font:800 15px/1 var(--manchete);box-shadow:0 0 0 6px #fffdf8}
.cena{position:relative;height:var(--cena-h);background:linear-gradient(180deg,#f3ede1,#efe7d7);overflow:hidden;border-bottom:1px solid var(--linha-papel)}
.cena::after{content:"";position:absolute;inset:0;z-index:0;background:radial-gradient(60% 70% at 50% 0%,rgb(255 255 255 / .55),transparent 70%);pointer-events:none}
.cena > *{z-index:1}
.tela-cel{z-index:2}
/* 01: a conta sobe e é enviada */
.tela-cel{position:absolute;left:50%;top:26px;translate:-50% 0;width:150px;height:230px;border-radius:26px;background:var(--tinta);box-shadow:0 20px 40px -18px rgb(10 28 43 / .6)}
.doc{position:absolute;left:14px;right:14px;top:22px;padding:12px;border-radius:10px;background:#fffdf8;display:grid;gap:6px;transition:transform 1s var(--ease) .6s,opacity .5s var(--ease) 1.2s}
.doc__cab{font:700 10px var(--texto);letter-spacing:.08em;text-transform:uppercase;color:var(--tinta-3)}
.doc__l{height:5px;border-radius:3px;background:#e4dccb}.doc__l--c{width:60%}
.doc b{font:800 18px var(--manchete);color:var(--tinta)}
.envio{position:absolute;left:50%;top:150px;translate:-50% 0;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--sol);color:var(--tinta);transition:transform .6s var(--ease) .3s}
.envio svg{width:20px;height:20px}
.ok{position:absolute;left:50%;top:70px;translate:-50% 0;display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:999px;background:var(--folha);color:#062a13;font:700 13px var(--texto);white-space:nowrap;opacity:0;transform:scale(.8);transition:opacity .4s var(--ease) 1.4s,transform .5s cubic-bezier(.3,1.5,.5,1) 1.4s}
.ok svg{width:16px;height:16px}
.passo.visto .doc{transform:translateY(-140px);opacity:0}
.passo.visto .envio{transform:translateY(-12px)}
.passo.visto .ok{opacity:1;transform:none}
/* 02: usina → UNE → casa, com os créditos passando */
.c2-no{z-index:2!important;position:absolute;top:46%;translate:-50% -50%;width:64px;height:64px;border-radius:20px;display:grid;place-items:center;background:#fffdf8;border:1px solid var(--linha-papel);box-shadow:0 14px 30px -18px rgb(10 28 43 / .5);color:var(--tinta);z-index:1}
.c2-no svg{width:30px;height:30px}
.c2-no--usina{left:18%;color:#b07d00}.c2-no--casa{left:82%;color:#178c3c}
.c2-no--une{left:50%;width:84px;height:84px;border-radius:26px;background:var(--tinta)}
.c2-no--une img{width:54px;height:54px}
.c2-trilha{z-index:0!important;position:absolute;left:18%;top:46%;width:64%;height:60px;translate:0 -50%;overflow:visible}
.c2-trilha path{fill:none;stroke:var(--sol);stroke-width:3;stroke-dasharray:6 8;stroke-linecap:round;vector-effect:non-scaling-stroke}
.c2-cred{position:absolute;left:18%;top:46%;width:12px;height:12px;margin:-6px 0 0 -6px;border-radius:50%;background:var(--sol);box-shadow:0 0 0 4px rgb(255 198 26 / .25),0 0 14px 3px rgb(255 198 26 / .6);opacity:0;z-index:2}
.passo.visto .c2-cred{animation:c2-vai 2.2s cubic-bezier(.45,0,.35,1) 2 both}
.passo.visto .c2-cred:nth-of-type(2){animation-delay:.45s}.passo.visto .c2-cred:nth-of-type(3){animation-delay:.9s}
@keyframes c2-vai{0%{left:18%;opacity:0}10%{opacity:1}90%{opacity:1}100%{left:82%;opacity:0}}
.c2-rot{position:absolute;left:50%;bottom:18px;translate:-50% 0;font:700 11px var(--texto);letter-spacing:.1em;text-transform:uppercase;color:#b07d00;white-space:nowrap}
/* 03: a conta cai */
.barras{position:absolute;left:24px;right:24px;bottom:22px;height:120px;display:flex;align-items:flex-end;gap:10px}
.barras i{flex:1;height:calc(var(--h) * 100%);border-radius:8px 8px 3px 3px;background:#d9cfbb;transform-origin:bottom;transform:scaleY(.05);transition:transform .9s var(--ease)}
.barras i.une{background:linear-gradient(180deg,var(--folha),#1fa84a)}
.barras .menos{position:absolute;left:calc(50% + 5px);right:0;top:-34px;text-align:center;font:800 14px var(--manchete);color:#178c3c;opacity:0;transform:translateY(6px);transition:opacity .5s var(--ease) 1.2s,transform .5s var(--ease) 1.2s}
.barras .menos::after{content:"";display:block;height:2px;margin:4px 10% 0;background:currentColor;opacity:.4}
.passo.visto .barras .menos{opacity:1;transform:none}
.passo.visto .barras i{transform:scaleY(1)}
.passo.visto .barras i:nth-child(2){transition-delay:.08s}.passo.visto .barras i:nth-child(3){transition-delay:.16s}.passo.visto .barras i:nth-child(4){transition-delay:.5s}.passo.visto .barras i:nth-child(5){transition-delay:.58s}.passo.visto .barras i:nth-child(6){transition-delay:.66s}
.c3-conta{position:absolute;left:20px;top:18px;padding:10px 14px;border-radius:14px;background:#fffdf8;border:1px solid var(--linha-papel);box-shadow:0 14px 30px -18px rgb(10 28 43 / .5);display:grid;gap:2px;text-align:left;z-index:2}
.c3-conta > span:first-child{font:700 10px var(--texto);letter-spacing:.08em;text-transform:uppercase;color:var(--tinta-3)}
.c3-conta s{font:600 13px var(--texto);color:var(--tinta-3)}
.c3-conta b{font:800 26px/1 var(--manchete);color:#178c3c;letter-spacing:-.02em}
.como__pe{margin-top:clamp(32px,4vw,48px);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 24px}
.selos{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}
.selos li{padding:9px 14px;border-radius:999px;background:#fffdf8;border:1px solid var(--linha-papel);font-weight:600;font-size:14px;color:var(--tinta-2)}
.selos li::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--folha);margin-right:8px;translate:0 -1px}
.botao--tinta{background:var(--tinta);color:var(--papel)}.botao--tinta:hover{background:#06131e;transform:translateY(-1px)}
@media (max-width:1000px){.passos{grid-template-columns:1fr;max-width:560px}.passos::before,.passos::after{display:none}}
@media (max-width:560px){.como{border-radius:50% 50% 0 0 / 34px 34px 0 0;margin-top:-34px}.como__pe .botao{width:100%}}
@media (prefers-reduced-motion:reduce){.passo .doc{transform:translateY(-140px);opacity:0}.passo .ok{opacity:1;transform:none}.barras i{transform:none}.c2-cred{display:none}}