/* Variáveis CSS para cores e tamanhos */
:root {
  --color-primary: #00B0F0;
  --color-secondary: #005F6A;
  --color-text: #2D3748;
  --color-text-light: #4A5568;
  --color-background: #FFFFFF;
  --color-background-light: #F7FAFC;
  --color-shadow: rgba(0, 0, 0, 0.1);
  --font-family: 'Inter', sans-serif;
  --font-weight-bold: 700;
  --font-weight-semibold: 600;
  --font-weight-medium: 500;
  --font-size-large: 2.5em;
  --font-size-medium: 1.5em;
  --font-size-small: 1em;
  --spacing-large: 80px;
  --spacing-medium: 40px;
  --spacing-small: 20px;
  --border-radius: 12px;
}

/* Reset básico */
body, h1, h2, h3, p, a, img {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Estilos globais */
body {
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: 1.6;
}

/* Scroll suave */
html {
  scroll-behavior: smooth;
}

/* Header */
header {
  background-color: var(--color-background);
  color: var(--color-text);
  padding: var(--spacing-small) 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: fixed;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 4px var(--color-shadow);
  top: 0;
}

.logo {
  max-width: 150px;
  height: auto;
}

nav {
  display: flex;
  gap: var(--spacing-small);
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  transition: color 0.3s;
}

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

.auth-buttons {
  display: flex;
  gap: var(--spacing-small);
  margin-right: 64px;
}

.auth-buttons a {
  color: var(--color-background);
  background-color: var(--color-primary);
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 20px;
  transition: background-color 0.3s;
  font-weight: var(--font-weight-bold);
}

.auth-buttons a:hover {
  background-color: var(--color-secondary);
}

.btn-login {
  color: var(--color-text-light);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  padding: 10px 20px;
  border-radius: 6px;
  transition: background-color 0.3s;
}

.btn-login:hover {
  background-color: var(--color-background-light);
}

a {
  color: var(--color-text-light);
  text-decoration: none;
  transition: color 0.3s;
}

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-background);
  padding: var(--spacing-large) 32px 80px;
  text-align: center;
  padding-top: calc(var(--spacing-small) * 2 + 150px);
  padding-top: 100px; /* Valor inicial estimado */
  position: relative;
  z-index: 999; /* Menor que o z-index do header */
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-bold);
  margin: 0 0 var(--spacing-small);
}

.hero p {
  font-size: var(--font-size-medium);
  line-height: 1.6;
  margin: 0 0 var(--spacing-medium);
}

.hero a {
  background-color: var(--color-primary);
  color: var(--color-background);
  padding: 15px 30px;
  text-decoration: none;
  border-radius: 30px;
  font-size: var(--font-size-medium);
  font-weight: var(--font-weight-bold);
  transition: background-color 0.3s;
}

.hero a:hover {
  background-color: var(--color-secondary);
}

.btn-primary {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #0056b3;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  margin: 20px;
}

.btn-primary:hover {
  background-color: #004080;
}

/* Conteúdo do modal */
.modal-content {
  background-color: white;
  margin: 10% auto;
  padding: 20px;
  border-radius: 8px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Botão de fechar */
.close {
  float: right;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
}

.close:hover {
  color: #ff0000;
}

/* Formulário */
form {
  display: flex;
  flex-direction: column;
}

label {
  margin-top: 10px;
  font-weight: bold;
}

input, textarea {
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 16px;
}

button[type="submit"] {
  margin-top: 20px;
  padding: 10px;
  background-color: #0056b3;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button[type="submit"]:hover {
  background-color: #004080;
}

/* Seção Sobre o Produto */
.about-product {
  background-color: var(--color-background);
  padding: var(--spacing-large) 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.about-content {
  text-align: left;
}

.about-content h2 {
  font-size: var(--font-size-large);
  color: var(--color-secondary);
  margin-bottom: var(--spacing-small);
  font-weight: var(--font-weight-bold);
}

.about-content .intro-text {
  font-size: var(--font-size-medium);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-small);
  font-weight: var(--font-weight-medium);
}

.about-content p {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-small);
  line-height: 1.6;
}

.about-content h3 {
  font-size: 1.8em;
  color: var(--color-text);
  margin-top: var(--spacing-medium);
  margin-bottom: var(--spacing-small);
  font-weight: var(--font-weight-semibold);
}

/* Seção de Benefícios */
.benefits {
  background-color: var(--color-background);
  padding: var(--spacing-large) 32px;
}

.benefits-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.benefits-content h2 {
  font-size: var(--font-size-large);
  color: var(--color-secondary);
  margin-bottom: var(--spacing-small);
  font-weight: var(--font-weight-bold);
}

.benefits-content .intro-text {
  font-size: var(--font-size-medium);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-medium);
  line-height: 1.6;
}

.benefits-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-small);
  justify-content: center;
}

.benefit-card {
  background-color: var(--color-background-light);
  padding: var(--spacing-medium);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 8px var(--color-shadow);
  flex: 1 1 calc(33.333% - var(--spacing-small));
  text-align: left;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.benefit-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 16px var(--color-shadow);
}

.benefit-card h3 {
  font-size: var(--font-size-medium);
  color: var(--color-primary);
  margin-bottom: 15px;
  font-weight: var(--font-weight-semibold);
}

.benefit-card ul {
  list-style-type: disc;
  margin-left: 20px;
  color: var(--color-text-light);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.benefit-card li {
  margin-bottom: 10px;
}

.ia-difference {
  margin-top: var(--spacing-large);
  text-align: left;
}

.ia-difference h3 {
  font-size: var(--font-size-large);
  color: var(--color-text);
  margin-bottom: var(--spacing-small);
  font-weight: var(--font-weight-bold);
}

.ia-difference p {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
  line-height: 1.6;
}

/* Seção de Funcionalidades Exclusivas */
.exclusive-features {
  background-color: var(--color-background-light);
  padding: var(--spacing-large) 32px;
}

.exclusive-features-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.exclusive-features-content h2 {
  font-size: var(--font-size-large);
  color: var(--color-secondary);
  margin-bottom: var(--spacing-small);
  font-weight: var(--font-weight-bold);
}

.exclusive-features-content .intro-text {
  font-size: var(--font-size-medium);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-medium);
  line-height: 1.6;
}

.features-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-small);
  justify-content: center;
}

.feature-card {
  background-color: var(--color-background);
  padding: var(--spacing-medium);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 8px var(--color-shadow);
  flex: 1 1 calc(33.333% - var(--spacing-small));
  text-align: left;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 16px var(--color-shadow);
}

.feature-card h3 {
  font-size: var(--font-size-medium);
  color: var(--color-primary);
  margin-bottom: 15px;
  font-weight: var(--font-weight-semibold);
}

.feature-card ul {
  list-style-type: disc;
  margin-left: 20px;
  color: var(--color-text-light);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.feature-card li {
  margin-bottom: 10px;
}

.why-advantage {
  margin-top: var(--spacing-large);
  text-align: left;
}

.why-advantage h3 {
  font-size: var(--font-size-large);
  color: var(--color-text);
  margin-bottom: var(--spacing-small);
  font-weight: var(--font-weight-bold);
}

.why-advantage ul {
  list-style-type: disc;
  margin-left: 20px;
  color: var(--color-text-light);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.why-advantage li {
  margin-bottom: 10px;
}

/* Seção de Arquitetura e Tecnologias Utilizadas */
.architecture {
  background-color: var(--color-background);
  padding: var(--spacing-large) 32px;
}

.architecture-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.architecture-content h2 {
  font-size: var(--font-size-large);
  color: var(--color-secondary);
  margin-bottom: var(--spacing-small);
  font-weight: var(--font-weight-bold);
}

.architecture-content .intro-text {
  font-size: var(--font-size-medium);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-medium);
  line-height: 1.6;
}

.architecture-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-small);
  justify-content: center;
}

.architecture-card {
  background-color: var(--color-background-light);
  padding: var(--spacing-medium);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 8px var(--color-shadow);
  flex: 1 1 calc(33.333% - var(--spacing-small));
  text-align: left;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.architecture-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 16px var(--color-shadow);
}

.architecture-card h3 {
  font-size: var(--font-size-medium);
  color: var(--color-primary);
  margin-bottom: 15px;
  font-weight: var(--font-weight-semibold);
}

.architecture-card ul {
  list-style-type: disc;
  margin-left: 20px;
  color: var(--color-text-light);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.architecture-card li {
  margin-bottom: 10px;
}

/* Footer */
footer {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-background);
  padding: var(--spacing-medium) 32px;
  text-align: left;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-left p {
  margin: 0;
  font-size: var(--font-size-small);
}

.footer-right .contact-info {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--spacing-medium);
}

.footer-right .contact-info li {
  display: flex;
  align-items: center;
}

.footer-right .contact-info a {
  color: var(--color-background);
  text-decoration: none;
  font-size: var(--font-size-small);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: opacity 0.3s;
}

.footer-right .contact-info a:hover {
  opacity: 0.8;
}

/* Ícones */
.fab, .fas {
  font-size: 1.2em;
}

/* Acessibilidade */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Responsividade */
@media (max-width: 768px) {
  header {
    padding: var(--spacing-small) 16px;
    flex-direction: column;
    align-items: flex-start;
  }

  .logo {
    max-width: 120px;
  }

  nav {
    flex-direction: column;
    gap: 10px;
    margin-top: var(--spacing-small);
  }

  .auth-buttons {
    margin-right: 0;
    margin-top: var(--spacing-small);
  }

  .auth-buttons a {
    padding: 8px 16px;
  }

  .hero {
    padding: var(--spacing-medium) 16px 60px;
  }

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

  .hero p {
    font-size: 1.2em;
  }

  .hero a {
    padding: 10px 20px;
    font-size: 1em;
  }

  .about-product, .benefits, .exclusive-features, .architecture {
    padding: var(--spacing-medium) 16px;
  }

  .benefits-grid, .features-grid, .architecture-grid {
    flex-direction: column;
  }

  .benefit-card, .feature-card, .architecture-card {
    flex: 1 1 100%;
    margin-bottom: var(--spacing-small);
  }

  .about-content h2, .benefits-content h2, .exclusive-features-content h2, .architecture-content h2 {
    font-size: 2em;
  }

  .about-content .intro-text, .benefits-content .intro-text, .exclusive-features-content .intro-text, .architecture-content .intro-text {
    font-size: 1.2em;
  }

  footer {
    padding: var(--spacing-medium) 16px;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-small);
  }

  .footer-right .contact-info {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-large: 2em;
    --font-size-medium: 1.2em;
    --font-size-small: 0.9em;
    --spacing-large: 40px;
    --spacing-medium: 20px;
    --spacing-small: 10px;
  }

  body {
    font-size: 14px;
  }
}