:root {
  --green: #138a5b;
  --green-dark: #0f6f4b;
  --blue: #17324d;
  --text: #1f2933;
  --muted: #667085;
  --light: #f3f6f8;
  --border: #d9e2ec;
  --white: #fff;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 16px clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--blue); }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--green);
  color: var(--white);
}
.site-nav { display: flex; align-items: center; gap: 18px; }
.site-nav a { color: var(--blue); font-weight: 600; }
.site-nav a.active { color: var(--green); }
.menu-toggle { display: none; }

.btn, button, .button-link {
  border: 0;
  border-radius: 8px;
  background: var(--green);
  color: var(--white);
  padding: 12px 18px;
  font-weight: 700;
  cursor: pointer;
  display: inline-block;
}
.btn.secondary { background: var(--blue); }
.btn.small { padding: 9px 14px; }

.hero {
  min-height: 580px;
  display: flex;
  align-items: center;
  padding: 64px clamp(18px, 5vw, 72px);
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(23, 50, 77, .94), rgba(19, 138, 91, .78)),
    url('/img/hero-smart-folha.svg') center/cover no-repeat;
}
.hero-content { max-width: 760px; }
.hero h1, .page-hero h1, .calc-intro h1 {
  margin: 0 0 16px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}
.hero p { font-size: 20px; max-width: 680px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 24px; }
.eyebrow { text-transform: uppercase; font-size: 13px; letter-spacing: 0; font-weight: 800; color: var(--green); }
.hero .eyebrow { color: #bcebd9; }

.section, .page-hero, .calculator-page, .contact-band, .cta-row, .authority {
  padding: 64px clamp(18px, 5vw, 72px);
}
.section-heading { max-width: 760px; margin-bottom: 28px; }
h2 { color: var(--blue); font-size: 30px; line-height: 1.2; margin: 0 0 14px; }
h3 { color: var(--blue); margin-top: 0; }
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
  background: var(--white);
}
.price { color: var(--green); font-weight: 700; }
.authority, .contact-band {
  background: var(--light);
}
.authority > div { max-width: 860px; }
.calculator-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}
.calculator-links a {
  padding: 18px;
  border: 1px solid var(--border);
  border-left: 5px solid var(--green);
  border-radius: 8px;
  font-weight: 700;
  color: var(--blue);
}
.calculator-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.calculator-switcher a {
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--blue);
  font-weight: 700;
  padding: 10px 14px;
  background: var(--white);
}
.calculator-switcher a.active {
  border-color: var(--green);
  background: #e8f7ef;
  color: var(--green-dark);
}
.calculators-index {
  max-width: 960px;
}
.calculators-index h1 {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.1;
}
.calculators-index p {
  max-width: 760px;
}

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 560px);
  gap: 32px;
  align-items: start;
}
.contact-band.single { display: block; }
form label { display: grid; gap: 6px; font-weight: 700; color: var(--blue); }
form label small { color: var(--muted); font-weight: 400; }
.check-row { grid-template-columns: auto 1fr; align-items: center; }
.check-row input { width: auto; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font: inherit;
  background: var(--white);
}
textarea { min-height: 120px; resize: vertical; }
.contact-form, .calculator-form, .save-simulation, .login-card {
  display: grid;
  gap: 14px;
}
.calculator-page {
  display: grid;
  grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}
.calc-intro { grid-column: 1 / -1; max-width: 850px; }
.result-panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  background: var(--light);
}
.result-list { display: grid; gap: 10px; margin-bottom: 18px; }
.result-list div { display: flex; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.notice, .alert { color: #8a4b13; background: #fff7e6; padding: 12px; border-radius: 8px; }
.success { color: #0f6f4b; background: #e8f7ef; padding: 12px; border-radius: 8px; }
.login-page { min-height: 70vh; display: grid; place-items: center; padding: 40px 18px; background: var(--light); }
.login-card { width: min(420px, 100%); background: var(--white); padding: 28px; border-radius: 8px; border: 1px solid var(--border); }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 32px clamp(18px, 5vw, 72px);
  background: var(--blue);
  color: var(--white);
}
.footer-links { display: flex; gap: 14px; flex-wrap: wrap; }
.whatsapp-float {
  position: fixed;
  right: 18px;
  bottom: 18px;
  background: var(--green);
  color: var(--white);
  padding: 12px 16px;
  border-radius: 8px;
  font-weight: 800;
}

@media (max-width: 760px) {
  .menu-toggle { display: block; }
  .site-nav { display: none; position: absolute; top: 71px; left: 0; right: 0; padding: 18px; background: var(--white); border-bottom: 1px solid var(--border); flex-direction: column; align-items: flex-start; }
  .site-nav.open { display: flex; }
  .hero { min-height: 520px; }
  .contact-band, .calculator-page { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; }
}