/* =========================================================================
   Quaerion — Glossário Answer Intelligence
   Design System v1.0 (Junho 2026). Fundo preto puro, roxo accent, glass dark.
   Regras de ouro: token semântico > hex hardcoded · Space Grotesk + Inter Tight ·
   fundo #000 · MetallicDivider entre seções · kicker antes de heading · mobile-first.
   ========================================================================= */

/* ----------------------------------------------------------------------- *
 * 1. Tokens
 * ----------------------------------------------------------------------- */
:root {
  /* Cores principais */
  --background: #000000;
  --foreground: oklch(0.984 0.003 247.858);
  --quaerion-purple: #7B61FF;
  --violet-glow: #A78BFA;
  --gradient-quaerion: linear-gradient(135deg, #7B61FF 0%, #A78BFA 100%);
  --shadow-violet-glow: 0 0 40px -10px color-mix(in oklab, #7B61FF 55%, transparent);

  /* Escala neutra (dark) */
  --border-10: rgba(255, 255, 255, 0.10);
  --border-15: rgba(255, 255, 255, 0.15);
  --border-20: rgba(255, 255, 255, 0.20);
  --text-75: rgba(255, 255, 255, 0.75);
  --text-55: rgba(255, 255, 255, 0.55);
  --text-40: rgba(255, 255, 255, 0.40);
  --glass-5: rgba(255, 255, 255, 0.04);
  --glass-8: rgba(255, 255, 255, 0.08);

  /* Metálico */
  --metallic: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);

  /* Tipografia */
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-sans: "Inter Tight", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  /* Layout */
  --radius: 0.625rem;
  --container: 1280px;
  --nav-h: 68px;
}

/* ----------------------------------------------------------------------- *
 * 2. Reset base
 * ----------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

::selection { background: color-mix(in oklab, var(--quaerion-purple) 45%, transparent); color: #fff; }

/* Ambient glow de fundo */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(60vw 40vw at 78% -6%, color-mix(in oklab, var(--quaerion-purple) 16%, transparent), transparent 70%),
    radial-gradient(50vw 40vw at 10% 8%, color-mix(in oklab, var(--violet-glow) 8%, transparent), transparent 65%);
}

/* ----------------------------------------------------------------------- *
 * 3. Tipografia
 * ----------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  line-height: 1.05;
  font-weight: 600;
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4.5vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

.kicker {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-55);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.kicker b { color: var(--violet-glow); font-weight: 500; }
.kicker .dash { color: var(--text-40); letter-spacing: 0; }

.eyebrow-num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ----------------------------------------------------------------------- *
 * 4. Layout
 * ----------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
  position: relative;
  z-index: 1;
}
@media (min-width: 768px) { .container { padding-inline: 2.5rem; } }

section { padding-block: 4rem; position: relative; z-index: 1; }
@media (min-width: 768px) { section { padding-block: 6rem; } }

.section-head { max-width: 760px; margin-bottom: 2.5rem; }
.section-head h2 { margin-top: 0.9rem; }
.section-head p { margin-top: 1rem; color: var(--text-75); font-size: 1.05rem; }

/* Divisor metálico */
.metallic-divider {
  height: 1px;
  width: 100%;
  border: 0;
  background: var(--metallic);
  position: relative;
  z-index: 1;
}

/* ----------------------------------------------------------------------- *
 * 5. Navbar
 * ----------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: color-mix(in oklab, #000 72%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-10);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; letter-spacing: -0.02em; }
.brand img { height: 26px; width: auto; display: block; }
.brand .dot { width: 9px; height: 9px; border-radius: 2px; background: var(--gradient-quaerion); box-shadow: var(--shadow-violet-glow); }
.footer .brand img { height: 30px; }
.nav-links { display: none; gap: 1.75rem; font-size: 0.9rem; color: var(--text-75); }
.nav-links a { transition: color 0.2s; }
.nav-links a:hover { color: var(--foreground); }
.nav-right { display: flex; align-items: center; gap: 0.75rem; }

.lang-switch { position: relative; display: none; }
.lang-switch .lang-btn {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-75);
  border: 1px solid var(--border-15);
  border-radius: 6px;
  padding: 0.42rem 0.6rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: border-color 0.2s, color 0.2s;
}
.lang-switch .lang-btn:hover { color: var(--foreground); border-color: var(--border-20); }
.lang-switch .lang-btn .chev { transition: transform 0.25s; }
.lang-switch.open .lang-btn .chev { transform: rotate(180deg); }
.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 158px;
  list-style: none;
  margin: 0; padding: 0.3rem;
  background: color-mix(in oklab, #0a0a0a 88%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-15);
  border-radius: 8px;
  box-shadow: 0 12px 40px -12px rgba(0,0,0,0.7);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s cubic-bezier(0.2,0.7,0.2,1);
  z-index: 60;
}
.lang-switch.open .lang-menu { opacity: 1; transform: none; pointer-events: auto; }
.lang-menu li {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-75);
  padding: 0.5rem 0.65rem;
  border-radius: 5px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  transition: background 0.15s, color 0.15s;
}
.lang-menu li:hover { background: var(--glass-8); color: var(--foreground); }
.lang-menu li[aria-selected="true"] { color: var(--foreground); }
.lang-menu li[aria-selected="true"]::after { content: "✓"; margin-left: auto; color: var(--violet-glow); font-size: 0.8rem; }
.lang-menu li .flag { font-size: 1rem; line-height: 1; }

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: 1px solid var(--border-15);
  border-radius: 6px;
  padding: 0.5rem;
  cursor: pointer;
}
.nav-toggle span { width: 18px; height: 1.6px; background: var(--foreground); display: block; transition: 0.25s; }

@media (min-width: 900px) {
  .nav-links { display: flex; }
  .lang-switch { display: inline-block; }
  .nav-toggle { display: none; }
}

/* Drawer mobile */
.drawer {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 49;
  background: color-mix(in oklab, #000 94%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: 0.28s ease;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  overflow-y: auto;
}
.drawer.open { transform: none; opacity: 1; pointer-events: auto; }
.drawer a { padding: 0.85rem 0.25rem; font-family: var(--font-display); font-size: 1.1rem; border-bottom: 1px solid var(--border-10); color: var(--text-75); }
.drawer a:hover { color: var(--foreground); }
@media (min-width: 900px) { .drawer { display: none; } }

/* ----------------------------------------------------------------------- *
 * 6. QButton — viewfinder lock
 * ----------------------------------------------------------------------- */
.qbtn {
  --pad-x: 1.4rem;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  padding: 0.85rem var(--pad-x);
  border: 1px solid var(--border-20);
  border-radius: 4px;
  background: transparent;
  color: var(--foreground);
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition: color 0.35s ease, border-color 0.35s ease;
}
@media (min-width: 768px) { .qbtn { letter-spacing: 0.22em; font-size: 0.78rem; } }

.qbtn .qbtn__label { position: relative; z-index: 2; }
/* fill sweep */
.qbtn::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  transform: translateY(101%);
  transition: transform 0.42s cubic-bezier(0.2, 0.7, 0.2, 1);
}
/* brackets */
.qbtn .bkt { position: absolute; width: 9px; height: 9px; z-index: 3; opacity: 0.55; transition: 0.35s cubic-bezier(0.2,0.7,0.2,1); }
.qbtn .bkt::before, .qbtn .bkt::after { content: ""; position: absolute; background: currentColor; }
.qbtn .bkt::before { width: 100%; height: 1.4px; }
.qbtn .bkt::after { height: 100%; width: 1.4px; }
.qbtn .tl { top: 5px; left: 5px; } .qbtn .tl::before { top: 0; left: 0; } .qbtn .tl::after { top: 0; left: 0; }
.qbtn .tr { top: 5px; right: 5px; } .qbtn .tr::before { top: 0; right: 0; } .qbtn .tr::after { top: 0; right: 0; }
.qbtn .bl { bottom: 5px; left: 5px; } .qbtn .bl::before { bottom: 0; left: 0; } .qbtn .bl::after { bottom: 0; left: 0; }
.qbtn .br { bottom: 5px; right: 5px; } .qbtn .br::before { bottom: 0; right: 0; } .qbtn .br::after { bottom: 0; right: 0; }
.qbtn:hover .tl { transform: translate(-2px, -2px); opacity: 1; }
.qbtn:hover .tr { transform: translate(2px, -2px); opacity: 1; }
.qbtn:hover .bl { transform: translate(-2px, 2px); opacity: 1; }
.qbtn:hover .br { transform: translate(2px, 2px); opacity: 1; }

/* variantes */
.qbtn--light { background: #fff; color: #000; border-color: #fff; }
.qbtn--light::after { background: #000; }
.qbtn--light:hover { color: #fff; border-color: #000; }
.qbtn--light:hover::after { transform: none; }

.qbtn--ghost { color: var(--foreground); }
.qbtn--ghost::after { background: #fff; }
.qbtn--ghost:hover { color: #000; border-color: #fff; }
.qbtn--ghost:hover::after { transform: none; }

.qbtn--muted { background: var(--glass-8); border-color: var(--border-15); color: var(--text-75); }
.qbtn--muted::after { background: rgba(255,255,255,0.14); }
.qbtn--muted:hover { color: var(--foreground); }
.qbtn--muted:hover::after { transform: none; }

.qbtn--sm { padding: 0.6rem 1rem; font-size: 0.72rem; }
.qbtn--lg { padding: 1.05rem 2rem; font-size: 0.85rem; }

/* ----------------------------------------------------------------------- *
 * 7. Hero
 * ----------------------------------------------------------------------- */
.hero { padding-top: 4rem; padding-bottom: 3rem; }
@media (min-width: 768px) { .hero { padding-top: 6rem; padding-bottom: 4rem; } }
.hero h1 { margin: 1.25rem 0 0; max-width: 16ch; }
.hero .lede { margin-top: 1.5rem; max-width: 62ch; color: var(--text-75); font-size: 1.12rem; }
.hero .lede strong { color: var(--foreground); font-weight: 600; }

.hero-stats { display: flex; flex-wrap: wrap; gap: 1.5rem 2.5rem; margin-top: 2.25rem; }
.hero-stats .stat { display: flex; flex-direction: column; }
.hero-stats .num { font-family: var(--font-display); font-size: 2rem; letter-spacing: -0.02em; background: var(--gradient-quaerion); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats .lbl { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--text-55); margin-top: 0.15rem; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2.5rem; }

/* Search */
.search-wrap { margin-top: 2.5rem; max-width: 560px; position: relative; }
.search-input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--foreground);
  background: var(--glass-5);
  border: 1px solid var(--border-15);
  border-radius: 6px;
  padding: 0.95rem 1rem 0.95rem 2.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-input::placeholder { color: var(--text-40); }
.search-input:focus { outline: none; border-color: color-mix(in oklab, var(--quaerion-purple) 60%, transparent); box-shadow: var(--shadow-violet-glow); }
.search-wrap .ic { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--text-40); }
.search-count { margin-top: 0.6rem; font-size: 0.78rem; color: var(--text-55); font-family: var(--font-mono); }

/* ----------------------------------------------------------------------- *
 * 8. Pilares (tabela-mestra) — cards
 * ----------------------------------------------------------------------- */
.pillars { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 640px) { .pillars { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .pillars { grid-template-columns: repeat(4, 1fr); } }

.pillar-card {
  position: relative;
  background: var(--glass-5);
  border: 1px solid var(--border-10);
  border-radius: 14px;
  padding: 1.5rem 1.35rem;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s;
}
.pillar-card::before {
  content: "";
  position: absolute; inset: 0; opacity: 0; transition: opacity 0.3s; pointer-events: none;
  background: radial-gradient(120px 80px at 50% 0%, color-mix(in oklab, var(--quaerion-purple) 30%, transparent), transparent 70%);
}
.pillar-card:hover { border-color: var(--border-20); transform: translateY(-3px); }
.pillar-card:hover::before { opacity: 1; }
.pillar-card .p-tag { font-family: var(--font-mono); font-size: 0.72rem; color: var(--violet-glow); letter-spacing: 0.08em; }
.pillar-card h3 { font-size: 1.6rem; margin: 0.5rem 0 0.35rem; }
.pillar-card .p-q { font-size: 0.95rem; color: var(--text-75); font-style: italic; }
.pillar-card .p-phase { margin-top: 1rem; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--text-55); padding-top: 0.85rem; border-top: 1px solid var(--border-10); }

/* ----------------------------------------------------------------------- *
 * 9. Módulos + termos
 * ----------------------------------------------------------------------- */
.glossary-layout { display: grid; grid-template-columns: 1fr; gap: 2.5rem; }
@media (min-width: 1024px) { .glossary-layout { grid-template-columns: 232px 1fr; gap: 3.5rem; align-items: start; } }

/* TOC sticky */
.toc { display: none; }
@media (min-width: 1024px) {
  .toc {
    display: block;
    position: sticky;
    top: calc(var(--nav-h) + 2rem);
    max-height: calc(100vh - var(--nav-h) - 4rem);
    overflow-y: auto;
    padding-right: 0.5rem;
  }
}
.toc .toc-title { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--text-55); margin-bottom: 1rem; font-family: var(--font-display); }
.toc a { display: flex; gap: 0.6rem; padding: 0.45rem 0; font-size: 0.85rem; color: var(--text-55); border-left: 1px solid var(--border-10); padding-left: 0.85rem; margin-left: -1px; transition: color 0.2s, border-color 0.2s; }
.toc a .m-idx { font-family: var(--font-mono); color: var(--text-40); font-size: 0.75rem; }
.toc a:hover { color: var(--text-75); }
.toc a.active { color: var(--foreground); border-left-color: var(--quaerion-purple); }
.toc a.active .m-idx { color: var(--violet-glow); }

.modules { min-width: 0; }
.module { padding-top: 1rem; scroll-margin-top: calc(var(--nav-h) + 24px); }
.module + .module { margin-top: 3.5rem; }
.module-head { display: flex; align-items: baseline; gap: 0.9rem; margin-bottom: 0.4rem; }
.module-head .m-num { font-family: var(--font-mono); font-size: 0.8rem; color: var(--violet-glow); letter-spacing: 0.05em; }
.module-head h3 { font-size: clamp(1.35rem, 2.4vw, 1.85rem); }
.module-desc { color: var(--text-55); font-size: 0.95rem; margin-bottom: 1.5rem; max-width: 70ch; }

.term-grid { display: grid; grid-template-columns: 1fr; gap: 0.85rem; }
@media (min-width: 560px) { .term-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .term-grid { grid-template-columns: 1fr; } }
@media (min-width: 1280px) { .term-grid { grid-template-columns: 1fr 1fr; } }

.term {
  position: relative;
  background: var(--glass-5);
  border: 1px solid var(--border-10);
  border-radius: 6px;
  padding: 1.25rem 1.3rem 1.35rem;
  scroll-margin-top: calc(var(--nav-h) + 24px);
  transition: border-color 0.25s, background 0.25s;
}
.term:hover { border-color: var(--border-20); background: var(--glass-8); }
.term:target { border-color: color-mix(in oklab, var(--quaerion-purple) 60%, transparent); box-shadow: var(--shadow-violet-glow); }
.term-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 0.75rem; }
.term dt, .term .term-name { font-family: var(--font-display); font-size: 1.08rem; font-weight: 600; letter-spacing: -0.01em; color: var(--foreground); }
.term-name a.term-link { color: inherit; display: inline; text-decoration: none; background-image: linear-gradient(var(--violet-glow), var(--violet-glow)); background-size: 0% 1px; background-repeat: no-repeat; background-position: 0 100%; transition: background-size 0.3s ease, color 0.2s ease; }
.term-name a.term-link:hover { color: var(--violet-glow); background-size: 100% 1px; }
.term-name a.term-link .tl-ic { font-family: var(--font-mono); font-size: 0.7em; color: var(--text-40); margin-left: 0.28em; vertical-align: 0.08em; transition: color 0.2s, transform 0.2s; display: inline-block; }
.term-name a.term-link:hover .tl-ic { color: var(--violet-glow); transform: translate(1px, -1px); }
.term:hover .term-name a.term-link .tl-ic { color: var(--text-55); }
.term .term-pill { font-family: var(--font-mono); font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--violet-glow); border: 1px solid var(--border-15); border-radius: 999px; padding: 0.18rem 0.5rem; white-space: nowrap; flex-shrink: 0; }
.term dd, .term .term-def { margin: 0.6rem 0 0; color: var(--text-75); font-size: 0.94rem; line-height: 1.62; }
.term dd .abbr, .term .term-def b { color: var(--foreground); font-weight: 600; }
.term a.xref { color: var(--violet-glow); border-bottom: 1px solid color-mix(in oklab, var(--violet-glow) 40%, transparent); transition: color 0.2s; }
.term a.xref:hover { color: var(--foreground); }

.term-foot { margin-top: 0.95rem; display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.9rem; }
.term-foot .deep { font-size: 0.76rem; color: var(--text-55); display: inline-flex; align-items: center; gap: 0.4rem; }
.term-foot .deep a { color: var(--text-75); border-bottom: 1px solid var(--border-15); }
.term-foot .deep a:hover { color: var(--violet-glow); border-color: var(--violet-glow); }
.term-foot .deep .deep-sep { color: var(--text-40); margin: 0 0.15rem; border: 0; }
.copy-anchor { background: none; border: 1px solid var(--border-10); border-radius: 4px; color: var(--text-40); font-family: var(--font-mono); font-size: 0.68rem; padding: 0.2rem 0.4rem; cursor: pointer; transition: 0.2s; }
.copy-anchor:hover { color: var(--violet-glow); border-color: var(--border-20); }

/* estado de busca */
.term.hide, .module.hide { display: none; }
.no-results { display: none; color: var(--text-55); font-family: var(--font-mono); font-size: 0.9rem; padding: 2rem 0; }
.no-results.show { display: block; }

/* ----------------------------------------------------------------------- *
 * 10. Quadro-resumo (tabela de diretivas)
 * ----------------------------------------------------------------------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--border-10); border-radius: 10px; }
table.q-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 640px; }
.q-table th, .q-table td { text-align: left; padding: 0.85rem 1rem; border-bottom: 1px solid var(--border-10); }
.q-table thead th { font-family: var(--font-display); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-55); background: var(--glass-5); }
.q-table tbody tr:last-child td { border-bottom: 0; }
.q-table tbody td:first-child { color: var(--foreground); font-weight: 600; }
.q-table tbody tr:hover td { background: rgba(255,255,255,0.02); }

/* ----------------------------------------------------------------------- *
 * 11. Backlinks (blog + soluções)
 * ----------------------------------------------------------------------- */
.link-grid { display: grid; grid-template-columns: 1fr; gap: 0.85rem; }
@media (min-width: 640px) { .link-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .link-grid { grid-template-columns: repeat(3, 1fr); } }

.link-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  background: var(--glass-5);
  border: 1px solid var(--border-10);
  border-radius: 6px;
  padding: 1.25rem 1.3rem;
  transition: border-color 0.25s, transform 0.25s, background 0.25s;
  overflow: hidden;
}
.link-card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity 0.3s; pointer-events: none;
  background: radial-gradient(140px 80px at 80% 0%, color-mix(in oklab, var(--quaerion-purple) 24%, transparent), transparent 70%);
}
.link-card:hover { border-color: var(--border-20); transform: translateY(-3px); background: var(--glass-8); }
.link-card:hover::before { opacity: 1; }
.link-card .lc-tag { font-family: var(--font-mono); font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--violet-glow); }
.link-card .lc-title { font-family: var(--font-display); font-size: 1.02rem; font-weight: 600; letter-spacing: -0.01em; line-height: 1.25; }
.link-card .lc-arrow { margin-top: auto; padding-top: 0.5rem; color: var(--text-40); font-size: 0.8rem; display: inline-flex; align-items: center; gap: 0.4rem; transition: color 0.2s, gap 0.2s; }
.link-card:hover .lc-arrow { color: var(--violet-glow); gap: 0.7rem; }

.link-subhead { font-family: var(--font-display); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--text-55); margin: 2.5rem 0 1.1rem; }
.link-subhead:first-of-type { margin-top: 0; }

/* ----------------------------------------------------------------------- *
 * 12. FAQ (FAQPage)
 * ----------------------------------------------------------------------- */
.faq-list { display: flex; flex-direction: column; gap: 0.75rem; max-width: 860px; }
.faq-item { border: 1px solid var(--border-10); border-radius: 6px; background: var(--glass-5); overflow: hidden; transition: border-color 0.25s; }
.faq-item:hover { border-color: var(--border-15); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1.1rem 1.3rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev { flex-shrink: 0; color: var(--text-55); transition: transform 0.25s; }
.faq-item[open] summary .chev { transform: rotate(45deg); color: var(--violet-glow); }
.faq-item .faq-a { padding: 0 1.3rem 1.2rem; color: var(--text-75); font-size: 0.96rem; line-height: 1.65; }
.faq-item .faq-a a { color: var(--violet-glow); border-bottom: 1px solid color-mix(in oklab, var(--violet-glow) 40%, transparent); }

/* ----------------------------------------------------------------------- *
 * 13. CTA final
 * ----------------------------------------------------------------------- */
.cta {
  position: relative;
  border: 1px solid var(--border-15);
  border-radius: 16px;
  padding: 3rem 1.75rem;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(60% 120% at 50% 0%, color-mix(in oklab, var(--quaerion-purple) 18%, transparent), transparent 70%),
    var(--glass-5);
}
.cta h2 { max-width: 20ch; margin-inline: auto; }
.cta p { margin: 1.1rem auto 0; max-width: 56ch; color: var(--text-75); }
.cta .hero-cta { justify-content: center; margin-top: 2rem; }

/* ----------------------------------------------------------------------- *
 * 14. Footer
 * ----------------------------------------------------------------------- */
.footer { border-top: 1px solid var(--border-10); padding-block: 3.5rem 2.5rem; position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 720px) { .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2.5rem; } }
.footer .brand { margin-bottom: 1rem; }
.footer .f-tagline { color: var(--text-55); font-size: 0.92rem; max-width: 34ch; }
.footer .f-col h4 { font-family: var(--font-display); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--text-55); font-weight: 500; margin-bottom: 1rem; }
.footer .f-col a { display: block; padding: 0.35rem 0; color: var(--text-75); font-size: 0.9rem; transition: color 0.2s; }
.footer .f-col a:hover { color: var(--foreground); }
.footer-company { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border-10); color: var(--text-40); font-size: 0.78rem; line-height: 1.7; }
.footer-company strong { color: var(--text-55); font-weight: 500; }
.footer-company a { color: var(--text-55); border-bottom: 1px solid var(--border-15); transition: color 0.2s, border-color 0.2s; }
.footer-company a:hover { color: var(--violet-glow); border-color: var(--violet-glow); }
.footer-bottom { margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border-10); display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; justify-content: space-between; align-items: center; color: var(--text-40); font-size: 0.8rem; }
.footer-bottom .f-legal { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.footer-bottom a:hover { color: var(--text-75); }

/* ----------------------------------------------------------------------- *
 * 15. Scroll reveal
 * ----------------------------------------------------------------------- */
[data-reveal] { filter: blur(14px); opacity: 0.001; transform: translateY(16px); transition: filter 0.9s cubic-bezier(0.2,0.7,0.2,1), opacity 0.9s, transform 0.9s cubic-bezier(0.2,0.7,0.2,1); }
[data-reveal].in { filter: blur(0); opacity: 1; transform: none; }

/* back-to-top */
.to-top { position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 40; width: 42px; height: 42px; border-radius: 8px; border: 1px solid var(--border-15); background: color-mix(in oklab, #000 70%, transparent); backdrop-filter: blur(10px); color: var(--text-75); display: grid; place-items: center; cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(8px); transition: 0.3s; }
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { color: var(--foreground); border-color: var(--border-20); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  [data-reveal] { filter: none; opacity: 1; transform: none; }
}

/* ----------------------------------------------------------------------- *
 * 16. Autoria / byline (E-E-A-T)
 * ----------------------------------------------------------------------- */
.byline { display: flex; align-items: center; gap: 0.85rem; margin-top: 2rem; padding: 0.85rem 1rem; border: 1px solid var(--border-10); border-radius: 10px; background: var(--glass-5); width: fit-content; max-width: 100%; }
.byline .avatar { width: 42px; height: 42px; border-radius: 8px; flex-shrink: 0; background: var(--gradient-quaerion); display: grid; place-items: center; font-family: var(--font-display); font-weight: 600; color: #fff; box-shadow: var(--shadow-violet-glow); }
.byline .meta { display: flex; flex-direction: column; gap: 0.1rem; line-height: 1.35; }
.byline .meta .who { font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; letter-spacing: -0.01em; }
.byline .meta .who a { color: inherit; border-bottom: 1px solid var(--border-20); transition: color 0.2s, border-color 0.2s; }
.byline .meta .who a:hover { color: var(--violet-glow); border-color: var(--violet-glow); }
.byline .meta .role { font-size: 0.78rem; color: var(--text-55); }
.byline .meta .role .li { color: var(--violet-glow); }
.byline .sep { color: var(--text-40); }

/* ----------------------------------------------------------------------- *
 * 17. Timeline de fases (método)
 * ----------------------------------------------------------------------- */
.timeline { position: relative; display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 720px) { .timeline { grid-template-columns: 1fr 1fr; } }
.phase-card { position: relative; background: var(--glass-5); border: 1px solid var(--border-10); border-radius: 12px; padding: 1.5rem 1.4rem; overflow: hidden; transition: border-color 0.3s, transform 0.3s; }
.phase-card::before { content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity 0.3s; pointer-events: none; background: radial-gradient(140px 90px at 12% 0%, color-mix(in oklab, var(--quaerion-purple) 26%, transparent), transparent 70%); }
.phase-card:hover { border-color: var(--border-20); transform: translateY(-3px); }
.phase-card:hover::before { opacity: 1; }
.phase-card .p-idx { font-family: var(--font-mono); font-size: 0.72rem; color: var(--violet-glow); letter-spacing: 0.08em; }
.phase-card .p-when { float: right; font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-40); border: 1px solid var(--border-10); border-radius: 999px; padding: 0.16rem 0.5rem; }
.phase-card h3 { font-size: 1.4rem; margin: 0.5rem 0 0.5rem; }
.phase-card p { color: var(--text-75); font-size: 0.94rem; }
.phase-card ul { list-style: none; margin-top: 0.9rem; padding: 0; display: flex; flex-direction: column; gap: 0.45rem; }
.phase-card li { position: relative; padding-left: 1.2rem; font-size: 0.88rem; color: var(--text-75); }
.phase-card li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 6px; height: 6px; border-radius: 2px; background: var(--gradient-quaerion); }

.arc { display: grid; grid-template-columns: 1fr; gap: 0.85rem; }
@media (min-width: 760px) { .arc { grid-template-columns: repeat(3, 1fr); } }
.arc-step { border: 1px solid var(--border-10); border-radius: 10px; padding: 1.25rem 1.3rem; background: var(--glass-5); }
.arc-step .n { font-family: var(--font-mono); color: var(--violet-glow); font-size: 0.75rem; }
.arc-step h4 { font-family: var(--font-display); font-size: 1.15rem; margin: 0.35rem 0 0.4rem; letter-spacing: -0.01em; }
.arc-step p { color: var(--text-55); font-size: 0.85rem; }

.principles { display: grid; grid-template-columns: 1fr; gap: 0.85rem; }
@media (min-width: 640px) { .principles { grid-template-columns: 1fr 1fr; } }
.principle { display: flex; gap: 0.9rem; padding: 1.2rem 1.3rem; border: 1px solid var(--border-10); border-radius: 8px; background: var(--glass-5); }
.principle .pn { font-family: var(--font-mono); color: var(--violet-glow); font-size: 0.9rem; flex-shrink: 0; }
.principle h4 { font-family: var(--font-display); font-size: 1rem; margin-bottom: 0.3rem; letter-spacing: -0.01em; }
.principle p { color: var(--text-55); font-size: 0.88rem; }

/* ----------------------------------------------------------------------- *
 * 18. Filtros por pilar + índice A–Z (glossário)
 * ----------------------------------------------------------------------- */
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; }
.chip { font-family: var(--font-display); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-75); background: var(--glass-5); border: 1px solid var(--border-15); border-radius: 999px; padding: 0.45rem 0.9rem; cursor: pointer; transition: 0.2s; }
.chip:hover { border-color: var(--border-20); color: var(--foreground); }
.chip.active { background: #fff; color: #000; border-color: #fff; }
.chip[data-pillar="GEO"].active, .chip[data-pillar="AEO"].active, .chip[data-pillar="AIO"].active { background: var(--gradient-quaerion); color: #fff; border-color: transparent; box-shadow: var(--shadow-violet-glow); }

.az-index { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: 1rem; }
.az-index a, .az-index span { font-family: var(--font-mono); font-size: 0.78rem; width: 1.8rem; height: 1.8rem; display: grid; place-items: center; border-radius: 5px; border: 1px solid var(--border-10); color: var(--text-75); transition: 0.15s; }
.az-index a:hover { border-color: var(--violet-glow); color: var(--violet-glow); }
.az-index span { color: var(--text-40); opacity: 0.4; border-style: dashed; }

/* util */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.text-glow { background: var(--gradient-quaerion); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* =========================================================================
   ELEVATION PASS — craft, ritmo, profundidade, usabilidade
   (mantém o design system; refina a execução)
   ========================================================================= */

/* --- Tokens de pilar (tints da marca, para escaneabilidade) --- */
:root {
  --p-seo: rgba(255,255,255,0.55);
  --p-aeo: #7B61FF;
  --p-aio: #A78BFA;
  --p-geo: #C795FF;
}

/* --- Atmosfera: grão sutil (estático, sem blend-mode = barato no scroll) --- */
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.022;
  will-change: auto;
}

/* --- Ritmo mais firme (menos vazio) --- */
section { padding-block: 3.25rem; }
@media (min-width: 768px) { section { padding-block: 4.75rem; } }
.hero { padding-top: 3.25rem; padding-bottom: 2.5rem; }
@media (min-width: 768px) { .hero { padding-top: 4.5rem; padding-bottom: 3rem; } }
.section-head { margin-bottom: 2rem; }
.section-head h2 { margin-top: 0.7rem; }
/* headings editoriais um tom menores → menos "vazio gritante" */
.section-head h2 { font-size: clamp(1.75rem, 3.6vw, 2.9rem); }
.hero h1 { font-size: clamp(2.4rem, 5.4vw, 4.4rem); }

/* --- Divisor metálico com brilho central --- */
.metallic-divider { background: linear-gradient(90deg, transparent, rgba(255,255,255,0.28) 45%, color-mix(in oklab, var(--violet-glow) 55%, transparent) 50%, rgba(255,255,255,0.28) 55%, transparent); }

/* --- Motion: reveal blur-preview on-brand, sem flash preto --- */
[data-reveal] { filter: blur(8px); opacity: 0.4; transform: translateY(10px); transition: filter 0.6s cubic-bezier(0.2,0.7,0.2,1), opacity 0.6s ease, transform 0.6s cubic-bezier(0.2,0.7,0.2,1); }
[data-reveal].in { filter: none; opacity: 1; transform: none; }

/* --- Hero stats: mais presença --- */
.hero-stats { gap: 1rem 1.75rem; }
.hero-stats .stat { padding: 0.85rem 1.1rem 0.85rem 1rem; border: 1px solid var(--border-10); border-radius: 8px; background: var(--glass-5); border-left: 2px solid color-mix(in oklab, var(--quaerion-purple) 55%, transparent); }
.hero-stats .num { font-size: 1.7rem; }
.hero-stats .lbl { color: var(--text-55); }

/* --- Pilares: barra de acento por pilar --- */
.pillar-card { border-top: 2px solid; border-top-color: var(--p-seo); }
.pillars .pillar-card:nth-child(2) { border-top-color: var(--p-aeo); }
.pillars .pillar-card:nth-child(3) { border-top-color: var(--p-aio); }
.pillars .pillar-card:nth-child(4) { border-top-color: var(--p-geo); }
.pillar-card .p-tag { color: var(--text-40); }

/* --- Seção "cidade": 4 cards de analogia --- */
.analogy { display: grid; grid-template-columns: 1fr; gap: 0.85rem; margin-top: 1.75rem; }
@media (min-width: 640px) { .analogy { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .analogy { grid-template-columns: repeat(4, 1fr); } }
.analogy-card { position: relative; border: 1px solid var(--border-10); border-radius: 10px; padding: 1.35rem 1.3rem; background: var(--glass-5); overflow: hidden; transition: border-color 0.25s, transform 0.25s; }
.analogy-card::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--ac, var(--p-seo)); opacity: 0.8; }
.analogy-card:hover { border-color: var(--border-20); transform: translateY(-3px); }
.analogy-card .ac-p { font-family: var(--font-display); font-size: 1.35rem; letter-spacing: -0.02em; }
.analogy-card .ac-q { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-40); margin: 0.15rem 0 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; }
.analogy-card p { font-size: 0.9rem; color: var(--text-75); line-height: 1.55; }
.analogy-card[data-p="AEO"] { --ac: var(--p-aeo); } .analogy-card[data-p="AIO"] { --ac: var(--p-aio); } .analogy-card[data-p="GEO"] { --ac: var(--p-geo); }

/* --- Cards de termo: acento por pilar + hierarquia --- */
.term { border-left: 2px solid var(--border-10); transition: border-color 0.25s, background 0.25s, transform 0.2s; }
.term:hover { transform: translateY(-2px); }
.term[data-pillar="SEO"] { border-left-color: color-mix(in oklab, var(--p-seo) 45%, transparent); }
.term[data-pillar="AEO"] { border-left-color: color-mix(in oklab, var(--p-aeo) 60%, transparent); }
.term[data-pillar="AIO"] { border-left-color: color-mix(in oklab, var(--p-aio) 60%, transparent); }
.term[data-pillar="GEO"] { border-left-color: color-mix(in oklab, var(--p-geo) 65%, transparent); }
.term[data-pillar="AEO"]:hover { border-left-color: var(--p-aeo); }
.term[data-pillar="AIO"]:hover { border-left-color: var(--p-aio); }
.term[data-pillar="GEO"]:hover { border-left-color: var(--p-geo); }
.term[data-pillar="SEO"]:hover { border-left-color: var(--p-seo); }
/* pill por pilar */
.term .term-pill { color: var(--text-55); }
.term[data-pillar="AEO"] .term-pill { color: var(--p-aeo); border-color: color-mix(in oklab, var(--p-aeo) 35%, transparent); }
.term[data-pillar="AIO"] .term-pill { color: var(--p-aio); border-color: color-mix(in oklab, var(--p-aio) 35%, transparent); }
.term[data-pillar="GEO"] .term-pill { color: var(--p-geo); border-color: color-mix(in oklab, var(--p-geo) 35%, transparent); }
/* footer: afordância "ler artigo" mais clara */
.term-foot { margin-top: 1.1rem; padding-top: 0.85rem; border-top: 1px solid var(--border-10); justify-content: space-between; }
.term-foot .deep { font-size: 0.74rem; }
.term-foot .deep a { display: inline-flex; align-items: center; gap: 0.3rem; }
.copy-anchor { opacity: 0; transition: opacity 0.2s, color 0.2s, border-color 0.2s; }
.term:hover .copy-anchor, .term:focus-within .copy-anchor { opacity: 1; }
@media (hover: none) { .copy-anchor { opacity: 1; } }

/* --- Chips e A–Z mais tácteis --- */
.filters { gap: 0.55rem; }
.chip { padding: 0.5rem 1rem; }
.az-index a, .az-index span { width: 2rem; height: 2rem; }

/* ----------------------------------------------------------------------- *
 * TOOLBAR STICKY do glossário (busca + chips sempre acessíveis)
 * ----------------------------------------------------------------------- */
.gtoolbar {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  z-index: 45;
  background: color-mix(in oklab, #000 78%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-10);
  transform: translateY(-120%);
  opacity: 0;
  transition: transform 0.32s cubic-bezier(0.2,0.7,0.2,1), opacity 0.32s ease;
  pointer-events: none;
}
.gtoolbar.show { transform: none; opacity: 1; pointer-events: auto; }
.gtoolbar .gt-inner { display: flex; align-items: center; gap: 0.75rem; padding: 0.6rem 0; }
.gtoolbar .gt-search { position: relative; flex: 1 1 auto; min-width: 0; max-width: 340px; }
.gtoolbar .gt-search .ic { position: absolute; left: 0.7rem; top: 50%; transform: translateY(-50%); color: var(--text-40); pointer-events: none; }
.gtoolbar .gt-search input { width: 100%; font-family: var(--font-sans); font-size: 0.9rem; color: var(--foreground); background: var(--glass-5); border: 1px solid var(--border-15); border-radius: 6px; padding: 0.55rem 0.7rem 0.55rem 2.2rem; }
.gtoolbar .gt-search input:focus { outline: none; border-color: color-mix(in oklab, var(--quaerion-purple) 60%, transparent); }
.gtoolbar .gt-search input::placeholder { color: var(--text-40); }
.gtoolbar .gt-chips { display: none; gap: 0.4rem; }
.gtoolbar .gt-chips .chip { padding: 0.4rem 0.75rem; font-size: 0.68rem; }
.gtoolbar .gt-count { margin-left: auto; font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-55); white-space: nowrap; }
.gtoolbar .gt-kbd { display: none; font-family: var(--font-mono); font-size: 0.66rem; color: var(--text-40); border: 1px solid var(--border-10); border-radius: 4px; padding: 0.15rem 0.4rem; }
@media (min-width: 720px) { .gtoolbar .gt-chips { display: flex; } }
@media (min-width: 980px) { .gtoolbar .gt-kbd { display: inline-block; } }