/* ========================================
   Adentrai — Design System
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0F1117;
  --bg-light: #161822;
  --bg-card: #1C1F2E;
  --primary: #7C5CFC;
  --primary-dark: #6344E0;
  --secondary: #00D4AA;
  --text: #E8E6F0;
  --text-muted: #9994B8;
  --accent: #FFB347;
  --border: #2A2D3E;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --max-width: 1120px;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Playfair Display', serif;
  line-height: 1.2;
  font-weight: 700;
}

a {
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

ul {
  list-style: none;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.25rem;
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 48px;
  font-size: 1.05rem;
}

.highlight {
  color: var(--primary);
}

.highlight-green {
  color: var(--secondary);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-primary {
  background: var(--accent);
  color: #1a1a1a;
}

.btn-primary:hover {
  background: #ffc46b;
  color: #1a1a1a;
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* --- Header / Nav --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}

.nav-logo span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 10px 24px;
  font-size: 0.85rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
  padding-top: 64px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(124, 92, 252, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(124, 92, 252, 0.15);
  border: 1px solid rgba(124, 92, 252, 0.3);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.35rem;
  color: var(--text);
  margin-bottom: 12px;
  font-weight: 500;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero-disclaimer {
  font-size: 0.78rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto;
  opacity: 0.7;
}

/* --- O que e --- */
.about {
  background: var(--bg-light);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  text-align: left;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1.02rem;
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 380px;
}

.about-card-msg {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.about-card-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 600;
}

.avatar-user {
  background: rgba(0, 212, 170, 0.2);
  color: var(--secondary);
}

.avatar-ai {
  background: rgba(124, 92, 252, 0.2);
  color: var(--primary);
}

.about-card-bubble {
  background: var(--bg-light);
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- Como Funciona --- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s, transform 0.3s;
}

.step-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(124, 92, 252, 0.15);
  color: var(--primary);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.step-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}

.step-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.step-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
}

/* --- Diferenciais --- */
.features {
  background: var(--bg-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s, transform 0.3s;
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.5rem;
}

.feature-icon-purple {
  background: rgba(124, 92, 252, 0.15);
}

.feature-icon-green {
  background: rgba(0, 212, 170, 0.15);
}

.feature-icon-amber {
  background: rgba(255, 179, 71, 0.15);
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.93rem;
}

/* --- Planos / Pricing --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s, transform 0.3s;
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  border-color: var(--primary);
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.pricing-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.pricing-card .price-period {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-card .price small {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-features {
  flex: 1;
  margin-bottom: 24px;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 0.93rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li::before {
  content: '';
  width: 20px;
  height: 20px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300D4AA' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/contain no-repeat;
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
  justify-content: center;
}

/* --- FAQ --- */
.faq {
  background: var(--bg-light);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  text-align: left;
  font-family: 'Inter', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  gap: 16px;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: transform 0.3s;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

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

.faq-answer-inner {
  padding-bottom: 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* --- CTA Final --- */
.cta-section {
  text-align: center;
  padding: 80px 0;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-size: 2.25rem;
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
}

/* --- Footer --- */
.footer {
  background: var(--bg-light);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.footer-brand h3 span {
  color: var(--primary);
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 300px;
}

.footer-col h4 {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 4px 0;
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.6;
}

.footer-bottom .cnpj {
  margin-top: 8px;
  font-size: 0.78rem;
  opacity: 0.6;
}

/* --- Legal Pages (privacidade, termos) --- */
.legal-page {
  padding-top: 100px;
  padding-bottom: 80px;
}

.legal-content {
  max-width: 780px;
  margin: 0 auto;
}

.legal-content h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.legal-content .legal-updated {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 40px;
}

.legal-content h2 {
  font-size: 1.4rem;
  margin-top: 40px;
  margin-bottom: 12px;
  color: var(--primary);
}

.legal-content h3 {
  font-size: 1.1rem;
  margin-top: 24px;
  margin-bottom: 8px;
  font-family: 'Inter', sans-serif;
}

.legal-content p {
  color: var(--text-muted);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.legal-content ul,
.legal-content ol {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 12px;
}

.legal-content ol {
  list-style: decimal;
}

.legal-content li {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.legal-content strong {
  color: var(--text);
}

.legal-content a {
  color: var(--secondary);
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.legal-back:hover {
  color: var(--text);
}

/* --- Responsive --- */

/* Tablet */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-text h2 {
    text-align: center;
  }

  .about-text p {
    text-align: center;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .footer-brand p {
    max-width: 100%;
  }

  /* Nav mobile */
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: rgba(15, 17, 23, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* Mobile small */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .container {
    padding: 0 16px;
  }

  .step-card,
  .feature-card,
  .pricing-card {
    padding: 24px 20px;
  }
}