:root {
  --primary: #007bff;
  --secondary: #6c757d;
  --light: #f8f9fa;
  --dark: #343a40;
  --danger: #dc3545;
  --success: #28a745;
  --warning: #ffc107;
  --gray: #6c757d;
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  background-color: #fff;
  color: var(--dark);
  line-height: 1.6;
}

/* ===================== */
/* Header */
/* ===================== */
header {
  background: var(--primary);
  color: #fff;
  padding: 15px 20px;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo i {
  font-size: 26px;
}

.logo h1 {
  font-size: 22px;
}

.user-actions .digyo-btn {
  background: #fff;
  color: var(--primary);
  padding: 8px 14px;
  border-radius: 6px;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.3s;
}

.user-actions .digyo-btn:hover {
  background: var(--light);
}

/* ===================== */
/* Container e layout */
/* ===================== */
.container {
  width: 100%;
  max-width: 1000px;
  margin: 20px auto;
  padding: 0 20px;
}

.intro {
  margin-bottom: 20px;
}

h2 {
  margin-bottom: 10px;
  font-size: 20px;
}

/* ===================== */
/* Calculadoras */
/* ===================== */
.calculator-root {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.calculator-tabs {
  display: flex;
  border-bottom: 1px solid #ddd;
  margin-bottom: 15px;
}

.calculator-tab {
  background: none;
  border: none;
  padding: 10px 15px;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.3s;
}

.calculator-tab.active {
  border-bottom: 3px solid var(--primary);
  font-weight: bold;
}

.input-group {
  margin-bottom: 15px;
}

.input-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
}

.input-group input,
.input-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 15px;
}

/* ===================== */
/* Botões */
/* ===================== */
button {
  cursor: pointer;
}

.calculate-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 16px;
  transition: background 0.3s;
}

.calculate-btn.large {
  font-size: 18px;
  padding: 14px 24px;
}

.calculate-btn:hover {
  background: #0056b3;
}

.result-container {
  margin-top: 20px;
  display: none;
  border-top: 1px solid #eee;
  padding-top: 15px;
}

.result-container.show {
  display: block;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.result-title {
  font-size: 18px;
}

.result-actions button {
  margin-left: 5px;
  background: var(--light);
  border: 1px solid #ddd;
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 14px;
}

.result-actions button:hover {
  background: #e9ecef;
}

.result-value {
  margin-bottom: 10px;
}

.value {
  font-size: 20px;
  font-weight: bold;
}

.value-label {
  font-size: 14px;
  color: var(--secondary);
}

.recommendations h4 {
  margin-bottom: 8px;
}

.recommendation-list {
  list-style: disc;
  margin-left: 20px;
  color: var(--gray);
}

/* ===================== */
/* Breadcrumbs (SEO + UX) */
/* ===================== */
.breadcrumb {
  font-size: 14px;
  margin: 10px 20px;
  color: var(--gray);
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* ===================== */
/* Footer */
/* ===================== */
footer {
  background: var(--light);
  padding: 15px;
  text-align: center;
  font-size: 14px;
  margin-top: 20px;
  border-top: 1px solid #ddd;
}

footer nav a {
  color: var(--primary);
  margin: 0 8px;
  text-decoration: none;
}

footer nav a:hover {
  text-decoration: underline;
}
.text-center {
  text-align: center;
}

.cta-button {
  margin: 30px 0;
}

.big-btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 16px 30px;
  font-size: 20px;
  border-radius: 10px;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.3s, transform 0.2s;
}

.big-btn:hover {
  background: #0056b3;
  transform: scale(1.05);
}