/* ==========================================================
   FACPED — folha de estilos principal
   Paleta: azul-índigo + ciano, neutros claros, tipografia moderna.
   ========================================================== */

:root{
  --c-bg:#f6f7fb;
  --c-surface:#ffffff;
  --c-surface-alt:#eef2f7;
  --c-border:#e2e6ef;
  --c-text:#0f172a;
  --c-muted:#475569;
  --c-soft-muted:#64748b;
  --c-primary:#4f46e5;
  --c-primary-strong:#3730a3;
  --c-primary-soft:#e0e7ff;
  --c-accent:#0ea5e9;
  --c-accent-soft:#e0f2fe;
  --c-success:#059669;
  --c-success-soft:#d1fae5;
  --c-warning:#b45309;
  --c-danger:#b91c1c;
  --c-radius:14px;
  --c-shadow:0 1px 2px rgba(15,23,42,.06), 0 8px 24px rgba(15,23,42,.06);
  --c-shadow-strong:0 6px 32px rgba(15,23,42,.12);
  --c-font:'Inter','Segoe UI',system-ui,-apple-system,'Helvetica Neue',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--c-font);
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img,svg{max-width:100%;height:auto;display:block;}

a{color:var(--c-primary);text-decoration:none;}
a:hover{text-decoration:underline;}

h1,h2,h3,h4{line-height:1.25;color:var(--c-text);margin:0 0 .5em;}
h1{font-size:clamp(1.7rem,2.4vw,2.4rem);letter-spacing:-.01em;}
h2{font-size:clamp(1.3rem,1.8vw,1.7rem);margin-top:1.6em;}
h3{font-size:1.1rem;margin-top:1.2em;}

p{margin:0 0 1em;}

.container{max-width:1180px;margin:0 auto;padding:0 20px;}

/* ---------- header ---------- */
.site-header{
  background:rgba(255,255,255,.85);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--c-border);
  position:sticky;top:0;z-index:50;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 20px;
}
.brand{display:flex;align-items:center;gap:12px;color:var(--c-text);}
.brand:hover{text-decoration:none;}
.brand-mark{display:inline-flex;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text strong{font-size:1.15rem;letter-spacing:.05em;color:var(--c-primary-strong);}
.brand-text span{font-size:.78rem;color:var(--c-soft-muted);}

/* nav */
.primary-nav ul{list-style:none;display:flex;gap:6px;margin:0;padding:0;}
.primary-nav a,.submenu-toggle{
  display:inline-flex;align-items:center;background:none;border:0;
  font:inherit;color:var(--c-text);
  padding:8px 12px;border-radius:10px;cursor:pointer;
}
.primary-nav a:hover,.submenu-toggle:hover{background:var(--c-surface-alt);text-decoration:none;}
.has-submenu{position:relative;}
.has-submenu .submenu{
  position:absolute;top:100%;left:0;min-width:240px;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:12px;padding:8px;
  box-shadow:var(--c-shadow-strong);display:none;
}
.has-submenu:hover .submenu,.has-submenu:focus-within .submenu{display:block;}
.has-submenu .submenu li{display:block;}
.has-submenu .submenu a{display:block;padding:8px 10px;border-radius:8px;}

.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--c-text);margin:5px 0;border-radius:2px;transition:.2s;}

/* ---------- hero / home ---------- */
.hero{
  background:linear-gradient(135deg,#4f46e5 0%,#0ea5e9 100%);
  color:#fff;padding:64px 0 56px;
}
.hero .container{max-width:880px;}
.hero h1{color:#fff;font-size:clamp(2rem,4vw,2.8rem);margin-bottom:.4em;}
.hero p{font-size:1.1rem;color:rgba(255,255,255,.92);max-width:640px;margin-bottom:1.6em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:11px 18px;border-radius:10px;
  font-weight:600;border:1px solid transparent;cursor:pointer;transition:.15s;
}
.btn-primary{background:#fff;color:#4f46e5;}
.btn-primary:hover{background:#eef2ff;text-decoration:none;}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-ghost:hover{background:rgba(255,255,255,.12);text-decoration:none;}

/* ---------- cards grid ---------- */
.section{padding:48px 0;}
.section-head{margin-bottom:24px;}
.section-head .eyebrow{
  display:inline-block;background:var(--c-primary-soft);color:var(--c-primary-strong);
  padding:4px 10px;border-radius:999px;font-size:.78rem;font-weight:600;
  text-transform:uppercase;letter-spacing:.04em;
}
.section-head p{color:var(--c-muted);max-width:680px;}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;}
.card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--c-radius);
  overflow:hidden;display:flex;flex-direction:column;transition:.18s;
  box-shadow:var(--c-shadow);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--c-shadow-strong);border-color:#cdd5e2;}
.card-figure{
  aspect-ratio:16/9;background:var(--c-surface-alt);
  display:flex;align-items:center;justify-content:center;
  border-bottom:1px solid var(--c-border);
}
.card-figure svg{width:78%;height:78%;}
.card-body{padding:18px 18px 20px;flex:1;display:flex;flex-direction:column;}
.card-body h3{font-size:1.1rem;margin-bottom:.3em;color:var(--c-primary-strong);}
.card-body p{color:var(--c-muted);font-size:.95rem;flex:1;}
.card-link{
  margin-top:14px;display:inline-flex;align-items:center;gap:6px;font-weight:600;
  color:var(--c-primary);
}

/* ---------- calculator page ---------- */
.tool-page{padding:40px 0 64px;}
.tool-header{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;margin-bottom:24px;}
.tool-header .figure{margin:0;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--c-radius);padding:18px;display:flex;justify-content:center;}
.tool-header .figure svg{max-height:160px;}

.tool-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--c-radius);
  box-shadow:var(--c-shadow);padding:26px;
}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field label{font-weight:600;font-size:.92rem;color:var(--c-text);}
.field input,.field select{
  font:inherit;padding:11px 12px;border:1px solid var(--c-border);
  border-radius:10px;background:#fff;color:var(--c-text);min-height:44px;
  transition:border .15s, box-shadow .15s;
}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(79,70,229,.18);
}
.field-hint{font-size:.8rem;color:var(--c-soft-muted);}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;}
.btn-calc{background:var(--c-primary);color:#fff;border:0;}
.btn-calc:hover{background:var(--c-primary-strong);text-decoration:none;}
.btn-secondary{background:var(--c-surface-alt);color:var(--c-text);border:1px solid var(--c-border);}
.btn-secondary:hover{background:#dde3ee;text-decoration:none;}

.result-box{
  margin-top:20px;background:var(--c-primary-soft);
  border:1px solid #c7d2fe;color:var(--c-primary-strong);
  border-radius:12px;padding:18px;display:none;
}
.result-box.is-error{background:#fee2e2;border-color:#fca5a5;color:#991b1b;}
.result-box.is-success{display:block;}
.result-box h2{font-size:1.15rem;margin:0 0 .6em;}
.result-box ul{margin:0;padding-left:1.2em;}
.result-box ul li{margin-bottom:.25em;}
.result-box .kv{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px 20px;}
.result-box .kv span{font-weight:600;}

.ad-slot{
  margin:30px auto;padding:14px;border:1px dashed var(--c-border);
  background:repeating-linear-gradient(45deg,#fafbff,#fafbff 10px,#f1f3fb 10px,#f1f3fb 20px);
  border-radius:10px;color:var(--c-soft-muted);font-size:.85rem;text-align:center;
}

/* ---------- content sections ---------- */
.content{max-width:820px;margin:40px auto 0;}
.content p,.content li{color:var(--c-text);}
.content ul{padding-left:1.4em;}
.example{
  background:var(--c-surface-alt);border-left:4px solid var(--c-primary);
  padding:14px 16px;border-radius:0 10px 10px 0;margin:14px 0;
}
.example code{background:#fff;padding:2px 6px;border-radius:6px;border:1px solid var(--c-border);font-size:.92em;}

.faq details{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:10px;
  padding:14px 16px;margin:10px 0;
}
.faq summary{cursor:pointer;font-weight:600;color:var(--c-primary-strong);}
.faq details[open]{background:#f8f9fd;}
.faq details p{margin:10px 0 0;color:var(--c-muted);}

.related-calculators{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--c-radius);
  padding:24px;margin-top:36px;
}
.related-calculators h2{margin-top:0;}
.related-list{list-style:none;padding:0;margin:0;display:grid;gap:10px;}
@media(min-width:700px){.related-list{grid-template-columns:repeat(2,1fr);}}
.related-list a{
  display:flex;align-items:center;gap:10px;padding:12px;border:1px solid var(--c-border);
  border-radius:10px;color:var(--c-text);background:#fff;
}
.related-list a:hover{border-color:var(--c-primary);text-decoration:none;background:var(--c-primary-soft);}
.related-list a span.arrow{margin-left:auto;color:var(--c-primary);}

/* ---------- institutional pages ---------- */
.page-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--c-radius);
  padding:30px;box-shadow:var(--c-shadow);
}

/* ---------- footer ---------- */
.site-footer{
  background:#0f172a;color:#cbd5e1;padding:48px 0 0;margin-top:64px;
}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;}
.site-footer h2{color:#fff;font-size:1.05rem;margin-bottom:.7em;}
.site-footer a{color:#cbd5e1;}
.site-footer a:hover{color:#fff;}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;}
.footer-bottom{
  border-top:1px solid #1e293b;margin-top:32px;padding:16px 0;font-size:.85rem;color:#94a3b8;
}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}

/* ---------- back to top ---------- */
.back-to-top{
  position:fixed;right:20px;bottom:20px;width:42px;height:42px;border-radius:50%;
  background:var(--c-primary);color:#fff;border:0;cursor:pointer;font-size:1.2rem;
  box-shadow:var(--c-shadow-strong);display:none;align-items:center;justify-content:center;
}
.back-to-top[hidden]{display:none;}
.back-to-top.is-visible{display:flex;}

/* ---------- responsive ---------- */
@media(max-width:880px){
  .footer-inner{grid-template-columns:1fr 1fr;}
  .tool-header{padding:0;}
  .hero{padding:48px 0 40px;}
}
@media(max-width:760px){
  .nav-toggle{display:block;}
  .primary-nav{
    position:fixed;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--c-border);
    max-height:0;overflow:hidden;transition:.25s;
  }
  .primary-nav.is-open{max-height:80vh;overflow:auto;box-shadow:var(--c-shadow);}
  .primary-nav ul{flex-direction:column;align-items:stretch;padding:10px 16px;gap:0;}
  .primary-nav a,.submenu-toggle{width:100%;justify-content:space-between;border-radius:8px;}
  .has-submenu .submenu{position:static;box-shadow:none;border:0;background:transparent;padding:0 0 0 8px;}
  .has-submenu.open .submenu{display:block;}
  .footer-inner{grid-template-columns:1fr;}
  .tool-card{padding:20px;}
}
@media(max-width:480px){
  .form-grid{grid-template-columns:1fr;}
  .brand-text span{display:none;}
  .hero{padding:42px 0 36px;}
}