/* Calculadora Fácil BR — ultraleve, zero dependências */
:root{
  --ink:#152820;
  --paper:#ffffff;
  --mist:#eef4f0;
  --verde:#0f6b47;
  --verde-esc:#0a4d33;
  --ambar:#b97a0e;
  --linha:#d5e0d9;
  --cinza:#5c6b63;
  --radius:10px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  font-size:1.0625rem;
}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;line-height:1.2;font-weight:700}
h1{font-size:clamp(1.7rem,4vw,2.4rem);margin:.2em 0 .4em}
h2{font-size:1.45rem;margin:1.6em 0 .5em}
h3{font-size:1.15rem;margin:1.3em 0 .4em}
a{color:var(--verde)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--ambar);outline-offset:2px}
.wrap{max-width:880px;margin:0 auto;padding:0 1.1rem}

/* Cabeçalho */
header{border-bottom:3px solid var(--verde);background:var(--paper)}
.topo{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.6rem;padding:.9rem 0}
.marca{font-family:Georgia,serif;font-size:1.3rem;font-weight:700;color:var(--verde-esc);text-decoration:none}
.marca span{color:var(--ambar)}
nav a{margin-left:1rem;text-decoration:none;color:var(--ink);font-size:.95rem}
nav a[aria-current="page"]{color:var(--verde);font-weight:600;border-bottom:2px solid var(--verde)}
nav a:hover{color:var(--verde)}

/* Hero */
.hero{background:var(--mist);padding:2.2rem 0;border-bottom:1px solid var(--linha)}
.hero p{max-width:56ch;color:var(--cinza);margin:.2em 0 0}

main{padding:1.8rem 0 3rem}

/* Cartões */
.cards{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin:1.4rem 0}
.card{border:1px solid var(--linha);border-radius:var(--radius);padding:1.2rem;background:var(--paper)}
.card h2,.card h3{margin-top:0}
.card p{color:var(--cinza);font-size:.97rem}
.btn{display:inline-block;background:var(--verde);color:#fff;text-decoration:none;padding:.65rem 1.2rem;border-radius:8px;border:0;font-size:1rem;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--verde-esc)}
.btn-sec{background:transparent;color:var(--verde);border:2px solid var(--verde)}
.btn-sec:hover{background:var(--mist)}

/* Formulários */
form.calc{border:1px solid var(--linha);border-radius:var(--radius);padding:1.3rem;margin:1.2rem 0;background:var(--paper)}
.campo{margin-bottom:1rem}
.campo label{display:block;font-weight:600;font-size:.95rem;margin-bottom:.25rem}
.campo input,.campo select{width:100%;padding:.6rem .7rem;border:1px solid var(--linha);border-radius:8px;font-size:1rem;font-family:inherit;background:#fff;color:var(--ink)}
.campo .dica{font-size:.85rem;color:var(--cinza);margin:.2rem 0 0}
.linha-dupla{display:grid;gap:1rem;grid-template-columns:1fr 1fr}
@media(max-width:560px){.linha-dupla{grid-template-columns:1fr}}
.check{display:flex;align-items:center;gap:.5rem;font-size:.97rem}
.check input{width:auto}

/* Recibo de resultado — assinatura visual do site */
.recibo{
  display:none;
  margin:1.5rem 0;
  border:1px solid var(--linha);
  border-radius:var(--radius);
  background:#fdfdfb;
  box-shadow:0 2px 10px rgba(15,40,30,.07);
  overflow:hidden;
}
.recibo.aberto{display:block}
.recibo-cab{background:var(--verde);color:#fff;padding:.8rem 1.2rem;font-family:Georgia,serif;font-size:1.05rem}
.recibo table{width:100%;border-collapse:collapse;font-size:.98rem}
.recibo td{padding:.55rem 1.2rem;border-bottom:1px dashed var(--linha)}
.recibo td:last-child{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.recibo tr.total td{border-bottom:0;border-top:2px solid var(--ink);font-weight:700;font-size:1.15rem;padding-top:.8rem;padding-bottom:.9rem}
.recibo tr.total td:last-child{color:var(--verde-esc)}
.recibo .neg td:last-child{color:#a33}
.recibo-rodape{padding:.7rem 1.2rem 1rem;font-size:.83rem;color:var(--cinza);border-top:1px dashed var(--linha)}

/* Tabela simples */
table.plana{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.95rem}
table.plana th,table.plana td{padding:.5rem .6rem;border-bottom:1px solid var(--linha);text-align:right;font-variant-numeric:tabular-nums}
table.plana th:first-child,table.plana td:first-child{text-align:left}
table.plana th{background:var(--mist);font-size:.85rem;text-transform:uppercase;letter-spacing:.03em}

/* Artigos */
.lista-artigos{list-style:none;padding:0;margin:1.2rem 0}
.lista-artigos li{border-bottom:1px solid var(--linha);padding:1rem 0}
.lista-artigos a{font-family:Georgia,serif;font-size:1.2rem;text-decoration:none;color:var(--ink)}
.lista-artigos a:hover{color:var(--verde)}
.lista-artigos p{margin:.3rem 0 0;color:var(--cinza);font-size:.95rem}
article.post{max-width:68ch}
article.post p{margin:1em 0}
.aviso{background:#fff8ea;border:1px solid #ecd9a8;border-radius:8px;padding:.8rem 1rem;font-size:.9rem;color:#6b5310;margin:1.2rem 0}

/* Espaço reservado para anúncios */
.ad-slot{margin:1.6rem 0;text-align:center}

/* Rodapé */
footer{border-top:1px solid var(--linha);background:var(--mist);padding:1.6rem 0;font-size:.9rem;color:var(--cinza)}
footer nav{margin-bottom:.5rem}
footer nav a{margin:0 .8rem 0 0;color:var(--cinza)}
@media (prefers-reduced-motion:no-preference){
  .recibo.aberto{animation:surgir .25s ease-out}
  @keyframes surgir{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
}

/* FAQ */
.faq details{border:1px solid var(--linha);border-radius:8px;margin:.5rem 0;padding:.6rem .9rem;background:var(--paper)}
.faq summary{font-weight:600;cursor:pointer;font-size:.98rem}
.faq p{margin:.5rem 0 .2rem;color:var(--cinza);font-size:.95rem}