/* ===================================================================
   RAIX Design System — Tokens e Estilos Globais
   Direção Visual: Inter (corpo) + JetBrains Mono (técnico)
   Paleta: Azul-marinho sóbrio + Esmeralda + Dourado discreto
   =================================================================== */

/* Inter hospedada no próprio site (sem requisição a terceiros).
   Fonte: rsms/inter v4.1, licença SIL OFL 1.1 (fonts/LICENSE-Inter.txt). */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/InterVariable.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/InterVariable-Italic.woff2') format('woff2');
}

/* JetBrains Mono hospedada no próprio site (trechos técnicos).
   Fonte: JetBrains/JetBrainsMono v2.304, licença SIL OFL 1.1 (fonts/LICENSE-JetBrainsMono.txt). */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/JetBrainsMono-Regular.woff2') format('woff2');
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/JetBrainsMono-Medium.woff2') format('woff2');
}

:root {
  /* Fundos */
  --bg-deep: #0B1325;
  --bg-surface: #1E2432;
  --bg-surface-hover: #263040;

  /* Texto */
  --text-primary: #F5F7FA;
  --text-secondary: #8A93A6;
  --text-muted: #5A6478;

  /* Ação */
  --accent-green: #00E676;
  --accent-green-hover: #00C853;
  --accent-green-text: #0B1325;

  /* Premium */
  --accent-gold: #D4AF37;
  --accent-gold-muted: rgba(212, 175, 55, 0.15);

  /* Erro */
  --accent-error: #E5484D;

  /* Bordas */
  --border-subtle: rgba(138, 147, 166, 0.15);
  --border-focus: rgba(0, 230, 118, 0.4);

  /* Tipografia */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Espaçamento */
  --container-max: 1120px;
  --section-padding: 6rem 1.5rem;
  --card-radius: 12px;
  --btn-radius: 8px;

  /* Transições */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--accent-green-hover);
}

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

/* ===================================================================
   Container
   =================================================================== */

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

/* ===================================================================
   Header / Navegação
   =================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 19, 37, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
}

.logo img {
  height: 32px;
  width: 32px;
  border-radius: 6px;
}

.logo-accent {
  color: var(--accent-green);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-desktop a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-desktop a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-green);
  border-radius: 1px;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

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

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

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

.nav-mobile {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(11, 19, 37, 0.98);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.5rem;
  list-style: none;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--btn-radius);
  transition: all var(--transition-fast);
}

.nav-mobile a:hover,
.nav-mobile a.active {
  color: var(--text-primary);
  background: var(--bg-surface);
}

/* ===================================================================
   Hero
   =================================================================== */

.hero {
  padding: 10rem 1.5rem 6rem;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background: var(--accent-gold-muted);
  color: var(--accent-gold);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.hero h1 span {
  color: var(--accent-green);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

/* ===================================================================
   Botões
   =================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--btn-radius);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-green);
  color: var(--accent-green-text);
}

.btn-primary:hover {
  background: var(--accent-green-hover);
  color: var(--accent-green-text);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 230, 118, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-outline:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  transform: translateY(-1px);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ===================================================================
   Seções
   =================================================================== */

.section {
  padding: var(--section-padding);
}

.section-alt {
  background: var(--bg-surface);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.section-center {
  text-align: center;
}

.section-center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ===================================================================
   Cards
   =================================================================== */

.card-grid {
  display: grid;
  gap: 1.5rem;
}

.card-grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
}

.card-grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  padding: 2rem;
  transition: all var(--transition-normal);
}

.section-alt .card {
  background: var(--bg-deep);
}

.card:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 230, 118, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent-green);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===================================================================
   Feature list (Segurança)
   =================================================================== */

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.feature-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.feature-bullet {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  margin-top: 0.55rem;
}

.feature-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===================================================================
   Honesty note
   =================================================================== */

.honesty-note {
  background: var(--bg-surface);
  border-left: 3px solid var(--accent-gold);
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
  padding: 1.5rem 2rem;
  margin-top: 3rem;
}

.section-alt .honesty-note {
  background: var(--bg-deep);
}

.honesty-note p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.honesty-note strong {
  color: var(--accent-gold);
}

/* ===================================================================
   PQC badge
   =================================================================== */

.pqc-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--accent-gold);
  border-radius: 100px;
  color: var(--accent-gold);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  margin-top: 1.5rem;
}

/* ===================================================================
   Contato
   =================================================================== */

.contact-block {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-email {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-green);
  margin: 1.5rem 0;
  display: block;
}

/* ===================================================================
   Trust line
   =================================================================== */

.trust-line {
  text-align: center;
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.trust-line p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-family: var(--font-mono);
}

/* ===================================================================
   Rodapé
   =================================================================== */

.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 1.5rem 2rem;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  line-height: 1.6;
}

.footer-links h4 {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

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

.footer-bottom {
  max-width: var(--container-max);
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===================================================================
   Page header (páginas internas)
   =================================================================== */

.page-header {
  padding: 8rem 1.5rem 3rem;
  text-align: center;
}

.page-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===================================================================
   Prose (conteúdo textual longo)
   =================================================================== */

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

.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  color: var(--text-primary);
}

.prose h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
}

.prose p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.prose ul, .prose ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.prose li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

/* ===================================================================
   Responsividade
   =================================================================== */

@media (max-width: 768px) {
  :root {
    --section-padding: 4rem 1.25rem;
  }

  .nav-desktop {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    padding: 8rem 1.25rem 4rem;
  }

  .footer-inner {
    flex-direction: column;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .card-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===================================================================
   Classes utilitárias (substituem inline styles)
   =================================================================== */

.card-grid-narrow {
  max-width: 640px;
  margin: 0 auto;
}

.card-center {
  text-align: center;
}

.card-icon-center {
  margin: 0 auto 1.25rem;
}

.honesty-note-narrow {
  max-width: 640px;
  margin: 3rem auto 0;
}

.prose-left {
  text-align: left;
}

.honesty-note-prose {
  max-width: 720px;
  margin: 0 auto;
}

.feature-list-prose {
  max-width: 720px;
}

.contact-description {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-btn {
  margin-top: 1.5rem;
}

.code-highlight {
  font-family: var(--font-mono);
  color: var(--accent-green);
  font-size: 0.85rem;
}

.card-grid-prose {
  max-width: 720px;
  margin: 0 auto;
}