/* ============================================
   XWareAI TrustRAG - Landing Page Styles
   Technologies Ltda. | Branding oficial
   Colores: negro #000000, rojo #FF0000,
   gris #3B4141, blanco #FFFFFF
   ============================================ */

:root {
  --color-black: #000000;
  --color-red: #FF0000;
  --color-white: #FFFFFF;
  --color-gray: #3B4141;
  --color-gray-light: #5A6060;
  --color-gray-dark: #1A1D1D;
  --color-gray-border: #2A2D2D;
  --font-primary: 'Inter', 'Roboto', 'Open Sans', Arial, sans-serif;
  --radius: 8px;
  --radius-sm: 4px;
  --transition: 0.3s ease;
  --max-width: 1200px;
  --header-height: 70px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-white);
  background-color: var(--color-black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
}

h1 {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  margin-bottom: 1rem;
  text-align: center;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-lead {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
}

/* Background hierarchy: gris #3B4141, negro #000, blanco #FFFFFF */
.section-dark {
  background-color: var(--color-black);
}

.section-gray {
  background-color: var(--color-gray);
}

.section-light {
  background-color: var(--color-white);
  color: var(--color-gray);
}

.section-light h2 {
  color: var(--color-black);
}

.section-light h3 {
  color: var(--color-black);
}

.section-light .section-lead {
  color: var(--color-gray);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  font-family: var(--font-primary);
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #CC0000;
  border-color: #CC0000;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--color-white);
  color: var(--color-black);
}

.section-light .btn-secondary {
  color: var(--color-black);
  border-color: var(--color-black);
}

.section-light .btn-secondary:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.05rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-black);
  z-index: 1000;
  border-bottom: 1px solid var(--color-gray-border);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-logo {
  flex-shrink: 0;
}

.logo-header {
  height: 30px;
  width: auto;
}

.header-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.header-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition);
}

.header-nav a:hover,
.header-nav a:focus-visible {
  color: var(--color-red);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: all var(--transition);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero */
.hero {
  background-color: var(--color-black);
  padding: calc(var(--header-height) + 3rem) 0 4rem;
  min-height: 600px;
  display: flex;
  align-items: center;
}

.hero-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: block;
  gap: 3rem;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background-color: rgba(255, 0, 0, 0.15);
  color: var(--color-red);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Hero diagram */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-diagram {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  width: 100%;
  max-width: 400px;
}

.diagram-step {
  display: flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--color-gray);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-red);
}

.diagram-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.doc-icon {
  background: linear-gradient(135deg, #FF0000 0%, #CC0000 100%);
}

.search-icon {
  background: linear-gradient(135deg, #3B4141 0%, #1A1D1D 100%);
  border: 2px solid var(--color-red);
}

.ai-icon {
  background: linear-gradient(135deg, #FF0000 0%, #3B4141 100%);
}

.diagram-step span {
  font-weight: 600;
  font-size: 1.05rem;
}

.diagram-arrow {
  width: 2px;
  height: 24px;
  background-color: var(--color-red);
  margin: 0 auto;
  position: relative;
}

.diagram-arrow::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--color-red);
}

/* Problem section */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.problem-card {
  background-color: #F5F5F5;
  padding: 1.5rem;
  border-radius: var(--radius);
  border-top: 3px solid var(--color-red);
}

.value-proposition {
  background-color: var(--color-gray);
  color: var(--color-white);
  padding: 2rem;
  border-radius: var(--radius);
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.value-proposition h3 {
  color: var(--color-red);
  margin-bottom: 1rem;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background-color: var(--color-gray-dark);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-gray-border);
  transition: border-color var(--transition);
}

.feature-card:hover {
  border-color: var(--color-red);
}

.feature-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-red);
  margin-bottom: 0.75rem;
  line-height: 1;
}

.feature-card h3 {
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Steps */
.steps-container {
  max-width: 800px;
  margin: 0 auto;
}

.step-item {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background-color: var(--color-red);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
}

.step-content {
  background-color: #F5F5F5;
  padding: 1.5rem;
  border-radius: var(--radius);
  flex: 1;
}

.step-content h3 {
  color: var(--color-black);
}

.step-content p {
  color: var(--color-gray);
  margin-bottom: 0;
}

.cta-intermediate {
  text-align: center;
  margin-top: 3rem;
  padding: 2rem;
  background-color: var(--color-black);
  border-radius: var(--radius);
}

.cta-intermediate h3 {
  color: var(--color-white);
  margin-bottom: 1.5rem;
}

/* Benefits */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.benefit-card {
  background-color: #F5F5F5;
  padding: 1.75rem;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-red);
}

.benefit-card h3 {
  color: var(--color-black);
}

.benefit-card p {
  color: var(--color-gray);
  margin-bottom: 0;
}

/* Use cases */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.usecase-card {
  background-color: var(--color-gray-dark);
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-gray-border);
  transition: transform var(--transition), border-color var(--transition);
}

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

.usecase-card h3 {
  color: var(--color-red);
  margin-bottom: 0.75rem;
}

.usecase-card p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 0;
}

/* Integrations */
.integrations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.integration-item {
  background-color: var(--color-white);
  padding: 1.75rem;
  border-radius: var(--radius);
  text-align: center;
  border: 2px solid transparent;
  transition: border-color var(--transition);
}

.integration-item:hover {
  border-color: var(--color-red);
}

.integration-item h3 {
  color: var(--color-black);
}

.integration-item p {
  color: var(--color-gray);
  margin-bottom: 0;
}

/* Architecture */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.arch-card {
  background-color: #F5F5F5;
  padding: 1.75rem;
  border-radius: var(--radius);
  border-top: 3px solid var(--color-gray);
}

.arch-card h3 {
  color: var(--color-black);
}

.arch-card p {
  color: var(--color-gray);
  margin-bottom: 0;
}

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

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

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  font-family: var(--font-primary);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-black);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
}

.faq-toggle {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  margin-left: 1rem;
}

.faq-toggle::before,
.faq-toggle::after {
  content: '';
  position: absolute;
  background-color: var(--color-red);
  transition: transform var(--transition);
}

.faq-toggle::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.faq-toggle::after {
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.faq-question[aria-expanded="true"] .faq-toggle::after {
  transform: translateX(-50%) rotate(90deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}

.faq-answer p {
  padding: 0 1.5rem 1.25rem;
  color: var(--color-gray);
  margin-bottom: 0;
}

/* Contact form */
.contact-wrapper {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-form {
  background-color: var(--color-gray-dark);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-gray-border);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-row .form-group {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: rgba(255, 255, 255, 0.9);
}

.required {
  color: var(--color-red);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--color-black);
  border: 1px solid var(--color-gray-border);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid var(--color-red);
  outline-offset: 1px;
  border-color: var(--color-red);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.form-error {
  display: block;
  color: var(--color-red);
  font-size: 0.8rem;
  margin-top: 0.4rem;
  min-height: 1em;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.form-checkbox input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-red);
  flex-shrink: 0;
}

.form-checkbox label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 0;
}

.form-checkbox a {
  color: var(--color-red);
  text-decoration: underline;
}

.form-actions {
  text-align: center;
}

.form-status {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.95rem;
  min-height: 1.5em;
}

.form-status.success {
  color: #4CAF50;
}

.form-status.error {
  color: var(--color-red);
}

.form-status.loading {
  color: rgba(255, 255, 255, 0.7);
}

#submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Contact direct */
.contact-direct {
  background-color: var(--color-gray);
  padding: 2rem;
  border-radius: var(--radius);
  align-self: start;
}

.contact-direct h3 {
  color: var(--color-white);
  margin-bottom: 1rem;
}

.contact-direct p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-link {
  color: var(--color-red);
  font-weight: 500;
  font-size: 0.95rem;
}

.contact-link:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  background-color: var(--color-black);
  padding: 3rem 0 0;
  border-top: 1px solid var(--color-gray-border);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-logo {
  max-width: 200px;
  width: 100%;
}

.footer-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
}

.footer-col h4 {
  color: var(--color-red);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col p,
.footer-col a,
.footer-col span {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--color-gray-border);
  padding: 1.5rem;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  margin-bottom: 0;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-visual {
    order: -1;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .header-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-black);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-gray-border);
    transform: translateY(-200%);
    transition: transform var(--transition);
    z-index: 999;
  }

  .header-nav.open {
    transform: translateY(0);
  }

  .menu-toggle {
    display: flex;
  }

  .header-actions .btn {
    display: none;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-row .form-group {
    margin-bottom: 1.5rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .step-item {
    flex-direction: column;
    gap: 0.75rem;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 2.5rem 0;
  }

  .hero {
    padding-top: calc(var(--header-height) + 2rem);
  }

  .container {
    padding: 0 1rem;
  }

  .header-container {
    padding: 0 1rem;
  }

  .contact-form {
    padding: 1.5rem;
  }
}

/* Accessibility */
:focus-visible {
  outline: 2px solid var(--color-red);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-red);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  z-index: 1001;
}

.skip-link:focus {
  top: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}