:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --border-soft: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
    sans-serif;
  background: var(--bg-page);
  color: var(--text-main);
}

header {
  border-bottom: 1px solid var(--border-soft);
  background: #ffffffcc;
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.top-bar {
  max-width: 960px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.logo-mark {
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
}

.logo-text {
  font-size: 16px;
}

.main-nav {
  display: flex;
  gap: 12px;
  font-size: 14px;
}

.main-nav a {
  text-decoration: none;
  color: var(--text-muted);
}

.main-nav a:hover {
  color: var(--primary);
}

.hero {
  padding: 32px 16px 8px;
}

.hero-content {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  font-size: 26px;
  margin-bottom: 8px;
}

.hero-subtitle {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
}

.calculator-section {
  padding: 16px;
}

.calculator-card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: 16px;
  padding: 20px 18px 22px;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  border: 1px solid #e5e7eb;
}

.calculator-card h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.calculator-text {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.calculator-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-group {
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 13px;
  margin-bottom: 4px;
  color: var(--text-main);
}

.form-group input[type='text'],
.form-group input[type='date'] {
  width: 100%;
  padding: 10px 11px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  font-size: 14px;
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.12);
}

.btn-primary {
  margin-top: 4px;
  width: 100%;
  padding: 11px 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.resultado-wrapper {
  margin-top: 18px;
  padding-top: 10px;
  border-top: 1px dashed var(--border-soft);
  text-align: left;
}

.resultado-titulo {
  font-size: 15px;
  margin-bottom: 4px;
}

.resultado-texto {
  font-size: 15px;
}

.extra-info {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.info-section,
.faq-section {
  padding: 20px 16px 8px;
}

.info-container,
.faq-container {
  max-width: 960px;
  margin: 0 auto;
}

.info-container h2,
.faq-container h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.info-container p,
.info-container ul {
  font-size: 14px;
  color: var(--text-muted);
}

.info-container ul {
  padding-left: 18px;
}

.faq-item {
  background: #ffffff;
  border-radius: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border-soft);
  margin-bottom: 10px;
}

.faq-item h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.faq-item p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}

.site-footer {
  margin-top: 18px;
  padding: 16px 12px 22px;
  border-top: 1px solid var(--border-soft);
  background: #ffffff;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--primary);
}

/* Ajustes em telas maiores */
@media (min-width: 768px) {
  .hero h1 {
    font-size: 30px;
  }

  .calculator-card {
    padding: 24px 24px 26px;
  }
}