/* ==========================================================================
   Base & Variáveis (Dark Theme Premium)
   ========================================================================== */
:root {
  --color-bg: #0A0D14;
  --color-surface: #131824;
  --color-surface-hover: #1c2333;
  --color-primary: #00F0FF;
  --color-primary-glow: rgba(0, 240, 255, 0.4);
  --color-text: #E0E6ED;
  --color-text-muted: #94A3B8;
  --color-border: #1E293B;
  --color-success: #10B981;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(19, 24, 36, 0.7);
  --glass-border: 1px solid rgba(255, 255, 255, 0.05);
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a:hover {
  text-shadow: 0 0 8px var(--color-primary-glow);
}

ul { list-style: none; }

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

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4 {
  color: #FFFFFF;
  line-height: 1.2;
  margin-bottom: 1rem;
  font-weight: 700;
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; margin-top: 3rem; }
h3 { font-size: 1.5rem; margin-top: 2rem; }
p { margin-bottom: 1.5rem; color: var(--color-text-muted); }
strong { color: #FFFFFF; }

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

/* ==========================================================================
   Header & Nav
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--glass-border);
  z-index: 1000;
  transition: var(--transition);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

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

.logo img {
  height: 40px;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-bg);
  box-shadow: 0 4px 20px var(--color-primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 240, 255, 0.6);
  color: var(--color-bg);
  text-shadow: none;
}

.btn-whatsapp {
  background-color: #25D366;
  color: #fff;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
}

.btn-whatsapp:hover {
  background-color: #128C7E;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(37, 211, 102, 0.6);
}

/* Floating WhatsApp */
.floating-whatsapp {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  background-color: #25D366;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
  z-index: 999;
  transition: var(--transition);
  animation: pulse 2s infinite;
}

.floating-whatsapp:hover {
  transform: scale(1.1);
  color: white;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
  70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 10rem 0 6rem;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, rgba(0, 240, 255, 0.1) 0%, var(--color-bg) 60%);
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.25rem;
  max-width: 800px;
  margin: 0 auto 2.5rem;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   Content Formatting (SEO Focus)
   ========================================================================== */
.content-box {
  background: var(--color-surface);
  border: var(--glass-border);
  border-radius: 12px;
  padding: 2.5rem;
  margin-bottom: 3rem;
}

.content-box h2 {
  color: var(--color-primary);
  margin-top: 0;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1rem;
}

/* Lists */
.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.feature-item {
  background: var(--color-bg);
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.feature-item:hover {
  border-color: var(--color-primary);
  transform: translateY(-5px);
}

.feature-item h3 {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
  color: #fff;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th, td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

th {
  background: rgba(0, 240, 255, 0.05);
  color: var(--color-primary);
  font-weight: 600;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.5rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: var(--transition);
}

.faq-item.active .faq-question::after {
  content: '-';
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-item.active .faq-answer {
  padding-bottom: 1.5rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  color: #fff;
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-col ul li {
  margin-bottom: 0.8rem;
}

.footer-col ul li a {
  color: var(--color-text-muted);
}

.footer-col ul li a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ==========================================================================
   Animations & Utilities
   ========================================================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }

/* ==========================================================================
   Responsive (Mobile First adaptations above, Desktop overrides here)
   ========================================================================== */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .hero { padding: 8rem 0 4rem; }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--color-surface);
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
    transition: var(--transition);
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .floating-whatsapp {
    bottom: 1rem;
    right: 1rem;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }
  
  /* Mobile fixed CTA */
  .mobile-fixed-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--color-surface);
    padding: 1rem;
    border-top: 1px solid var(--color-border);
    z-index: 998;
    display: flex;
    justify-content: center;
  }
  
  .mobile-fixed-cta .btn {
    width: 100%;
  }
  
  .footer {
    padding-bottom: 80px; /* Space for mobile CTA */
  }
}

@media (min-width: 769px) {
  .mobile-fixed-cta {
    display: none;
  }
}

/* SEO Visually Hidden */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}