/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

/* CSS CSS Reset & Variables */
:root {
  /* Color Palette - Light Theme Default */
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f5f9;
  --bg-card: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.8);
  --border-color: #e2e8f0;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --primary-color: #1e3a8a; /* Deep Trust Blue */
  --primary-hover: #1e40af;
  --primary-light: #eff6ff;
  
  --accent-green: #059669; /* Emerald Green */
  --accent-green-hover: #047857;
  --accent-green-light: #ecfdf5;
  
  --accent-blue: #0284c7; /* Cyan/Sky Blue */
  --accent-blue-light: #f0f9ff;
  
  --accent-yellow: #d97706;
  --accent-yellow-light: #fef3c7;
  
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px rgba(30, 58, 138, 0.08);
  --shadow-glow-green: 0 0 20px rgba(5, 150, 105, 0.1);
  
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s ease;
}

/* Dark Theme Variables */
body.dark-mode {
  --bg-base: #070b13; /* Deep dark space */
  --bg-surface: #0f1524;
  --bg-surface-hover: #172033;
  --bg-card: #121a2e;
  --bg-header: rgba(15, 21, 36, 0.85);
  --border-color: #1e293b;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --primary-color: #3b82f6; /* Modern Blue */
  --primary-hover: #60a5fa;
  --primary-light: #172554;
  
  --accent-green: #10b981; /* Bright Emerald */
  --accent-green-hover: #34d399;
  --accent-green-light: #064e3b;
  
  --accent-blue: #38bdf8;
  --accent-blue-light: #0c4a6e;
  
  --accent-yellow: #fbbf24;
  --accent-yellow-light: #78350f;
  
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px rgba(59, 130, 246, 0.15);
  --shadow-glow-green: 0 0 25px rgba(16, 185, 129, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

p {
  color: var(--text-secondary);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navigation */
header {
  position: sticky;
  top: 0;
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-primary);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-green));
  color: white;
  font-size: 1.2rem;
}

.logo-text span {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}

/* Theme Toggle Switch */
.theme-switch-wrapper {
  display: flex;
  align-items: center;
}

.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  background-color: var(--bg-card);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-surface-hover);
  transform: translateY(-2px);
  border-color: var(--primary-color);
}

.theme-toggle-btn .sun-icon {
  display: none;
}

body.dark-mode .theme-toggle-btn .moon-icon {
  display: none;
}

body.dark-mode .theme-toggle-btn .sun-icon {
  display: block;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 60px 0 40px;
  background: radial-gradient(circle at 50% 0%, var(--primary-light), transparent 60%);
  transition: background var(--transition-slow);
}

.hero h1 {
  margin-bottom: 16px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero p {
  font-size: 1.15rem;
  max-width: 650px;
  margin: 0 auto;
}

/* Dashboard Grid Layout */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 30px;
  margin-bottom: 40px;
}

@media (max-width: 992px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

/* Card Styles */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-glow);
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

/* Form Styles */
.form-group {
  margin-bottom: 22px;
}

.form-label-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-value-badge {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary-color);
  font-family: var(--font-heading);
}

.input-icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 16px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: var(--bg-surface);
  box-shadow: 0 0 0 4px var(--primary-light);
}

.input-with-prefix {
  padding-left: 42px;
}

/* Input Sync Grid (Entrada R$ e %) */
.sync-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 15px;
}

/* Range Sliders */
.range-slider-container {
  margin-top: 10px;
  display: flex;
  align-items: center;
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border-color);
  outline: none;
  transition: background 0.3s;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  border: 2px solid var(--bg-surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: var(--accent-green);
}

.range-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  border: 2px solid var(--bg-surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.range-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
  background: var(--accent-green);
}

/* Prazo Button Grid */
.prazo-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.prazo-btn {
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 8px 4px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}

.prazo-btn:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--text-muted);
}

.prazo-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

/* System Toggle Selector (Price vs SAC) */
.amort-toggle-wrapper {
  display: flex;
  background-color: var(--bg-base);
  padding: 6px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  position: relative;
  z-index: 1;
}

.amort-toggle-btn {
  flex: 1;
  text-align: center;
  padding: 10px 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  z-index: 2;
}

.amort-toggle-btn.active {
  color: white;
  background-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

body.dark-mode .amort-toggle-btn.active {
  background-color: var(--primary-color);
}

/* Accordion for Optional Fields */
.accordion-item {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background-color: var(--bg-base);
  margin-top: 15px;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.accordion-header {
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-secondary);
  user-select: none;
  transition: background-color var(--transition-fast);
}

.accordion-header:hover {
  background-color: var(--bg-surface-hover);
}

.accordion-header-icon {
  transition: transform var(--transition-normal);
  font-size: 1.1rem;
}

.accordion-item.open .accordion-header-icon {
  transform: rotate(180deg);
}

.accordion-item.open {
  background-color: var(--bg-card);
  border-color: var(--primary-color);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease-out;
}

.accordion-item.open .accordion-content {
  max-height: 500px; /* high enough to cover contents */
}

.accordion-body {
  padding: 20px;
  border-top: 1px solid var(--border-color);
}

/* Results Formatting */
.kpi-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 25px;
}

.kpi-card {
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 18px;
  text-align: center;
  transition: all var(--transition-fast);
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-color);
}

.kpi-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.kpi-value {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-heading);
}

.kpi-value.highlight {
  color: var(--accent-green);
}

/* Savings Banner */
.savings-banner {
  background: linear-gradient(135deg, var(--accent-green-light), rgba(5, 150, 105, 0.05));
  border: 1px dashed var(--accent-green);
  border-radius: var(--border-radius-md);
  padding: 20px;
  margin-bottom: 25px;
  display: none; /* Shown dynamically in JS */
  align-items: flex-start;
  gap: 15px;
  box-shadow: var(--shadow-glow-green);
  animation: slideDown var(--transition-normal) forwards;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.savings-icon {
  font-size: 1.8rem;
  color: var(--accent-green);
  line-height: 1;
}

.savings-title {
  font-weight: 700;
  color: var(--accent-green);
  margin-bottom: 4px;
  font-family: var(--font-heading);
}

.savings-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.savings-text strong {
  color: var(--text-primary);
}

/* Side-by-Side Savings / Comparison Card */
.comparison-container {
  background-color: var(--bg-base);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  padding: 20px;
  margin-bottom: 25px;
}

.comparison-header {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 12px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.comparison-option {
  padding: 12px;
  border-radius: var(--border-radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
}

.comparison-option.recommended {
  border-color: var(--accent-green);
  box-shadow: 0 0 10px rgba(5, 150, 105, 0.08);
  position: relative;
}

.comparison-badge {
  position: absolute;
  top: -8px;
  right: 10px;
  background-color: var(--accent-green);
  color: white;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
}

.comp-name {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.comp-val {
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-heading);
}

.comp-detail {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.comparison-savings-summary {
  margin-top: 15px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
}

.comparison-savings-summary span {
  color: var(--accent-green);
  font-weight: 700;
}

/* Chart Styles */
.chart-container {
  position: relative;
  margin: 0 auto;
  height: 260px;
  width: 100%;
  max-width: 260px;
}

/* Amortization Table Section */
.table-section {
  margin-bottom: 50px;
}

.table-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 20px;
}

.table-controls {
  display: flex;
  align-items: center;
  gap: 15px;
}

/* Period Toggle Button */
.period-toggle {
  display: flex;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 4px;
  border-radius: 8px;
}

.period-btn {
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.period-btn.active {
  background-color: var(--primary-color);
  color: white;
}

/* Button Export */
.btn-export {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--accent-green);
  color: white;
  border: none;
  padding: 10px 18px;
  border-radius: var(--border-radius-md);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.btn-export:hover {
  background-color: var(--accent-green-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(5, 150, 105, 0.2);
}

/* Table Wrapper for Responsiveness */
.table-responsive-wrapper {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  background-color: var(--bg-card);
  margin-bottom: 20px;
}

.amort-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.amort-table th {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
  font-weight: 700;
  padding: 16px 20px;
  font-family: var(--font-heading);
  border-bottom: 2px solid var(--border-color);
}

.amort-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.amort-table tbody tr:last-child td {
  border-bottom: none;
}

.amort-table tbody tr:hover {
  background-color: var(--bg-surface-hover);
}

/* Pagination Control styling */
.pagination-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
  margin-top: 15px;
}

.pagination-info {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.pagination-buttons {
  display: flex;
  gap: 6px;
}

.page-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.page-btn:hover:not(:disabled) {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background-color: var(--primary-light);
}

.page-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* SEO Content Section / FAQ Section */
.seo-section {
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

.seo-section h2 {
  margin-bottom: 35px;
  text-align: center;
  position: relative;
  padding-bottom: 15px;
}

.seo-section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-green));
  border-radius: 2px;
}

.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 25px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-card {
  background-color: var(--bg-base);
  border-radius: var(--border-radius-md);
  padding: 25px;
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.faq-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.faq-card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-card h3::before {
  content: '?';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 800;
}

.faq-card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Footer Section */
footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.footer-logo {
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 25px;
}

.footer-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

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

/* Responsive Overrides */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.6rem;
  }
  .hero {
    padding: 40px 0 25px;
  }
  .card {
    padding: 20px;
  }
  .kpi-grid {
    grid-template-columns: 1fr;
  }
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  .prazo-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .table-header-row {
    flex-direction: column;
    align-items: stretch;
  }
  .table-controls {
    flex-direction: column;
    align-items: stretch;
  }
  .period-toggle {
    justify-content: center;
  }
  .btn-export {
    justify-content: center;
  }
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  .footer-links {
    justify-content: center;
  }
}

/* Quick Navigation */
html { scroll-behavior: smooth; }
.quick-nav { display: flex; gap: 12px; margin: 16px auto 24px; flex-wrap: wrap; justify-content: center; max-width: 1200px; padding: 0 24px; }
.quick-nav-btn { padding: 8px 20px; border-radius: 50px; background: #4F46E5; color: #fff; font-weight: 600; font-size: 0.9rem; text-decoration: none; transition: opacity 0.2s; }
.quick-nav-btn:hover { opacity: 0.85; }