/* ==========================================================================
   DevFlux (vonluqi.online) — Folha de Estilos Oficial
   100% estático, sem fontes/CDNs externas, suporte a tema escuro/claro
   ========================================================================== */

:root {
  /* Paleta Padrão — Modo Escuro */
  --bg-color: #0B0614;
  --surface-color: #140C24;
  --surface-alt: #1D1233;
  --border-color: #2A1B45;
  --border-hover: #3E2963;
  --text-color: #EDE9FE;
  --text-secondary: #A69CC6;
  --text-muted: #7A6F9B;
  --accent-color: #8B5CF6;
  --accent-hover: #A78BFA;
  --accent-2: #22D3EE;
  --accent-2-hover: #67E8F9;
  --link-color: #A78BFA;
  --link-hover: #C4B5FD;
  --code-bg: #1F1338;
  --code-border: #352356;
  --callout-bg: rgba(139, 92, 246, 0.08);
  --callout-border: #8B5CF6;
  --header-bg: rgba(11, 6, 20, 0.85);
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  --chip-bg: rgba(139, 92, 246, 0.15);
  --chip-border: rgba(139, 92, 246, 0.3);
  --chip-text: #C4B5FD;
  --btn-primary-bg: #8B5CF6;
  --btn-primary-text: #FFFFFF;
  --btn-secondary-bg: #1D1233;
  --btn-secondary-border: #2A1B45;
  --btn-secondary-text: #EDE9FE;
  --grid-line: rgba(139, 92, 246, 0.04);
}

@media (prefers-color-scheme: light) {
  :root {
    /* Paleta Alternativa — Modo Claro */
    --bg-color: #FAF8FF;
    --surface-color: #FFFFFF;
    --surface-alt: #F3EEFC;
    --border-color: #E6E0F5;
    --border-hover: #D0C4EB;
    --text-color: #1A1033;
    --text-secondary: #5B5276;
    --text-muted: #847A9F;
    --accent-color: #6D28D9;
    --accent-hover: #5B21B6;
    --accent-2: #0891B2;
    --accent-2-hover: #0E7490;
    --link-color: #6D28D9;
    --link-hover: #4C1D95;
    --code-bg: #F4EFFF;
    --code-border: #E2D7F7;
    --callout-bg: rgba(109, 40, 217, 0.05);
    --callout-border: #6D28D9;
    --header-bg: rgba(250, 248, 255, 0.85);
    --card-shadow: 0 4px 20px rgba(26, 16, 51, 0.05);
    --chip-bg: rgba(109, 40, 217, 0.08);
    --chip-border: rgba(109, 40, 217, 0.2);
    --chip-text: #6D28D9;
    --btn-primary-bg: #6D28D9;
    --btn-primary-text: #FFFFFF;
    --btn-secondary-bg: #FFFFFF;
    --btn-secondary-border: #E6E0F5;
    --btn-secondary-text: #1A1033;
    --grid-line: rgba(109, 40, 217, 0.04);
  }
}

/* ==========================================================================
   Reset e Estrutura Básica
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-color);
  background-color: var(--bg-color);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.15), transparent 70%),
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
  background-position: 0 0, -1px -1px, -1px -1px;
  background-repeat: no-repeat, repeat, repeat;
  padding-top: 5rem;
  margin: 0;
}

/* Acessibilidade: Skip Link e Foco Visível */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--accent-color);
  color: #ffffff;
  padding: 0.5rem 1rem;
  z-index: 1000;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}

/* Container de Conteúdo */
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

/* ==========================================================================
   Cabeçalho Fixo
   ========================================================================== */

header.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  background-color: var(--header-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-link {
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-color);
}

.brand-flux {
  background: linear-gradient(135deg, var(--accent-color), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.brand-sub {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

nav.main-nav a:hover {
  color: var(--text-color);
  background-color: var(--surface-alt);
}

nav.main-nav a[aria-current="page"] {
  color: var(--text-color);
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  font-weight: 600;
}

/* ==========================================================================
   Tipografia
   ========================================================================== */

h1, h2, h3, h4 {
  color: var(--text-color);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.25;
}

h1 {
  font-size: 2.25rem;
  margin-top: 1rem;
  margin-bottom: 0.75rem;
}

h2 {
  font-size: 1.45rem;
  margin-top: 0;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.15rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1.25rem;
  color: var(--text-color);
}

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

li {
  margin-bottom: 0.5rem;
}

a {
  color: var(--link-color);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
  background-color: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.15rem 0.4rem;
  border-radius: 5px;
  color: var(--accent-hover);
  word-break: break-all;
}

/* ==========================================================================
   Componentes: Cards, Chips, Callout, Sumário
   ========================================================================== */

/* Cards de Seção */
.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.25rem 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--card-shadow);
}

/* Chips / Selos */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: var(--chip-bg);
  border: 1px solid var(--chip-border);
  color: var(--chip-text);
  padding: 0.3rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: 1rem;
}

.page-header {
  text-align: center;
  padding: 2rem 0 2.5rem;
}

.page-header h1 {
  margin-bottom: 0.75rem;
}

/* Sumário Clicável */
.table-of-contents {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem 2rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--card-shadow);
}

.table-of-contents h2 {
  font-size: 1.2rem;
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.table-of-contents ol {
  margin: 0;
  padding-left: 1.35rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

.table-of-contents a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
}

.table-of-contents a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* Bloco de Destaque (Limited Use) */
.callout-limited-use {
  background-color: var(--callout-bg);
  border-left: 4px solid var(--callout-border);
  border-radius: 0 12px 12px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.callout-limited-use p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Página Inicial (Hero, Plataformas, CTA)
   ========================================================================== */

.hero {
  text-align: center;
  padding: 2.5rem 0 3.5rem;
}

.hero h1 {
  font-size: 2.5rem;
  letter-spacing: -0.035em;
  margin-bottom: 1.25rem;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
}

/* Grid de 3 Cards de Plataformas */
.platform-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.platform-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem 1.25rem;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
}

.platform-card h3 {
  font-size: 1.15rem;
  margin-top: 0;
  margin-bottom: 0.6rem;
  color: var(--text-color);
}

.platform-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.55;
}

/* Banner de CTA / Botões Legais */
.cta-banner {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2.25rem 2rem;
  text-align: center;
  margin-bottom: 2.5rem;
  box-shadow: var(--card-shadow);
}

.cta-banner h2 {
  margin-bottom: 0.5rem;
}

.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.1s ease, background-color 0.15s ease, border-color 0.15s ease;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--btn-secondary-bg);
  border: 1px solid var(--btn-secondary-border);
  color: var(--btn-secondary-text);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  background-color: var(--surface-alt);
}

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

footer.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-align: center;
}

.footer-links {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin: 0 0 1.25rem;
  padding: 0;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.footer-copy {
  margin: 0 0 0.5rem;
  color: var(--text-color);
  font-weight: 500;
}

.footer-contact {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-contact a {
  color: var(--text-secondary);
}

/* ==========================================================================
   Responsividade Mobile (até 640px)
   ========================================================================== */

@media (max-width: 640px) {
  body {
    padding-top: 6.5rem;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.6rem 1rem;
    gap: 0.5rem;
  }

  nav.main-nav ul {
    gap: 0.4rem;
    flex-wrap: wrap;
  }

  nav.main-nav a {
    padding: 0.25rem 0.5rem;
    font-size: 0.9rem;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .platform-cards {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 1.5rem 1.25rem;
  }

  .table-of-contents {
    padding: 1.5rem 1.25rem;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .btn {
    text-align: center;
  }
}